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bbf6f052 | 1 | /* Convert tree expression to rtl instructions, for GNU compiler. |
c85f7c16 | 2 | Copyright (C) 1988, 92-97, 1998 Free Software Foundation, Inc. |
bbf6f052 RK |
3 | |
4 | This file is part of GNU CC. | |
5 | ||
6 | GNU CC is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU CC is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU CC; see the file COPYING. If not, write to | |
940d9d63 RK |
18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
bbf6f052 RK |
20 | |
21 | ||
22 | #include "config.h" | |
670ee920 | 23 | #include "system.h" |
ca695ac9 | 24 | #include "machmode.h" |
bbf6f052 RK |
25 | #include "rtl.h" |
26 | #include "tree.h" | |
ca695ac9 | 27 | #include "obstack.h" |
bbf6f052 | 28 | #include "flags.h" |
bf76bb5a | 29 | #include "regs.h" |
4ed67205 | 30 | #include "hard-reg-set.h" |
3d195391 | 31 | #include "except.h" |
bbf6f052 RK |
32 | #include "function.h" |
33 | #include "insn-flags.h" | |
34 | #include "insn-codes.h" | |
bbf6f052 | 35 | #include "insn-config.h" |
d6f4ec51 KG |
36 | /* Include expr.h after insn-config.h so we get HAVE_conditional_move. */ |
37 | #include "expr.h" | |
bbf6f052 RK |
38 | #include "recog.h" |
39 | #include "output.h" | |
bbf6f052 | 40 | #include "typeclass.h" |
ca55abae | 41 | #include "defaults.h" |
10f0ad3d | 42 | #include "toplev.h" |
bbf6f052 RK |
43 | |
44 | #define CEIL(x,y) (((x) + (y) - 1) / (y)) | |
45 | ||
46 | /* Decide whether a function's arguments should be processed | |
bbc8a071 RK |
47 | from first to last or from last to first. |
48 | ||
49 | They should if the stack and args grow in opposite directions, but | |
50 | only if we have push insns. */ | |
bbf6f052 | 51 | |
bbf6f052 | 52 | #ifdef PUSH_ROUNDING |
bbc8a071 | 53 | |
3319a347 | 54 | #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD) |
bbf6f052 RK |
55 | #define PUSH_ARGS_REVERSED /* If it's last to first */ |
56 | #endif | |
bbc8a071 | 57 | |
bbf6f052 RK |
58 | #endif |
59 | ||
60 | #ifndef STACK_PUSH_CODE | |
61 | #ifdef STACK_GROWS_DOWNWARD | |
62 | #define STACK_PUSH_CODE PRE_DEC | |
63 | #else | |
64 | #define STACK_PUSH_CODE PRE_INC | |
65 | #endif | |
66 | #endif | |
67 | ||
68 | /* Like STACK_BOUNDARY but in units of bytes, not bits. */ | |
69 | #define STACK_BYTES (STACK_BOUNDARY / BITS_PER_UNIT) | |
70 | ||
18543a22 ILT |
71 | /* Assume that case vectors are not pc-relative. */ |
72 | #ifndef CASE_VECTOR_PC_RELATIVE | |
73 | #define CASE_VECTOR_PC_RELATIVE 0 | |
74 | #endif | |
75 | ||
bbf6f052 RK |
76 | /* If this is nonzero, we do not bother generating VOLATILE |
77 | around volatile memory references, and we are willing to | |
78 | output indirect addresses. If cse is to follow, we reject | |
79 | indirect addresses so a useful potential cse is generated; | |
80 | if it is used only once, instruction combination will produce | |
81 | the same indirect address eventually. */ | |
82 | int cse_not_expected; | |
83 | ||
84 | /* Nonzero to generate code for all the subroutines within an | |
85 | expression before generating the upper levels of the expression. | |
86 | Nowadays this is never zero. */ | |
87 | int do_preexpand_calls = 1; | |
88 | ||
89 | /* Number of units that we should eventually pop off the stack. | |
90 | These are the arguments to function calls that have already returned. */ | |
91 | int pending_stack_adjust; | |
92 | ||
93 | /* Nonzero means stack pops must not be deferred, and deferred stack | |
94 | pops must not be output. It is nonzero inside a function call, | |
95 | inside a conditional expression, inside a statement expression, | |
96 | and in other cases as well. */ | |
97 | int inhibit_defer_pop; | |
98 | ||
bbf6f052 RK |
99 | /* Nonzero means __builtin_saveregs has already been done in this function. |
100 | The value is the pseudoreg containing the value __builtin_saveregs | |
101 | returned. */ | |
102 | static rtx saveregs_value; | |
103 | ||
dcf76fff TW |
104 | /* Similarly for __builtin_apply_args. */ |
105 | static rtx apply_args_value; | |
106 | ||
cff48d8f RH |
107 | /* Nonzero if the machine description has been fixed to accept |
108 | CONSTANT_P_RTX patterns. We will emit a warning and continue | |
109 | if we find we must actually use such a beast. */ | |
110 | static int can_handle_constant_p; | |
111 | ||
956d6950 JL |
112 | /* Don't check memory usage, since code is being emitted to check a memory |
113 | usage. Used when flag_check_memory_usage is true, to avoid infinite | |
114 | recursion. */ | |
115 | static int in_check_memory_usage; | |
116 | ||
4969d05d RK |
117 | /* This structure is used by move_by_pieces to describe the move to |
118 | be performed. */ | |
4969d05d RK |
119 | struct move_by_pieces |
120 | { | |
121 | rtx to; | |
122 | rtx to_addr; | |
123 | int autinc_to; | |
124 | int explicit_inc_to; | |
e9cf6a97 | 125 | int to_struct; |
4969d05d RK |
126 | rtx from; |
127 | rtx from_addr; | |
128 | int autinc_from; | |
129 | int explicit_inc_from; | |
e9cf6a97 | 130 | int from_struct; |
4969d05d RK |
131 | int len; |
132 | int offset; | |
133 | int reverse; | |
134 | }; | |
135 | ||
9de08200 RK |
136 | /* This structure is used by clear_by_pieces to describe the clear to |
137 | be performed. */ | |
138 | ||
139 | struct clear_by_pieces | |
140 | { | |
141 | rtx to; | |
142 | rtx to_addr; | |
143 | int autinc_to; | |
144 | int explicit_inc_to; | |
145 | int to_struct; | |
146 | int len; | |
147 | int offset; | |
148 | int reverse; | |
149 | }; | |
150 | ||
292b1216 | 151 | extern struct obstack permanent_obstack; |
4ed67205 | 152 | extern rtx arg_pointer_save_area; |
c02bd5d9 | 153 | |
03566575 JW |
154 | static rtx get_push_address PROTO ((int)); |
155 | ||
4969d05d RK |
156 | static rtx enqueue_insn PROTO((rtx, rtx)); |
157 | static int queued_subexp_p PROTO((rtx)); | |
158 | static void init_queue PROTO((void)); | |
4969d05d | 159 | static int move_by_pieces_ninsns PROTO((unsigned int, int)); |
eae4b970 | 160 | static void move_by_pieces_1 PROTO((rtx (*) (rtx, ...), enum machine_mode, |
4969d05d | 161 | struct move_by_pieces *)); |
9de08200 | 162 | static void clear_by_pieces PROTO((rtx, int, int)); |
eae4b970 | 163 | static void clear_by_pieces_1 PROTO((rtx (*) (rtx, ...), enum machine_mode, |
9de08200 RK |
164 | struct clear_by_pieces *)); |
165 | static int is_zeros_p PROTO((tree)); | |
166 | static int mostly_zeros_p PROTO((tree)); | |
d77fac3b JL |
167 | static void store_constructor_field PROTO((rtx, int, int, enum machine_mode, |
168 | tree, tree, int)); | |
e1a43f73 | 169 | static void store_constructor PROTO((tree, rtx, int)); |
4969d05d | 170 | static rtx store_field PROTO((rtx, int, int, enum machine_mode, tree, |
ece32014 MM |
171 | enum machine_mode, int, int, |
172 | int, int)); | |
e009aaf3 JL |
173 | static enum memory_use_mode |
174 | get_memory_usage_from_modifier PROTO((enum expand_modifier)); | |
4969d05d RK |
175 | static tree save_noncopied_parts PROTO((tree, tree)); |
176 | static tree init_noncopied_parts PROTO((tree, tree)); | |
e5e809f4 | 177 | static int safe_from_p PROTO((rtx, tree, int)); |
4969d05d | 178 | static int fixed_type_p PROTO((tree)); |
01c8a7c8 | 179 | static rtx var_rtx PROTO((tree)); |
4969d05d RK |
180 | static int get_pointer_alignment PROTO((tree, unsigned)); |
181 | static tree string_constant PROTO((tree, tree *)); | |
182 | static tree c_strlen PROTO((tree)); | |
55a6ba9f | 183 | static rtx get_memory_rtx PROTO((tree)); |
307b821c RK |
184 | static rtx expand_builtin PROTO((tree, rtx, rtx, |
185 | enum machine_mode, int)); | |
0006469d TW |
186 | static int apply_args_size PROTO((void)); |
187 | static int apply_result_size PROTO((void)); | |
188 | static rtx result_vector PROTO((int, rtx)); | |
189 | static rtx expand_builtin_apply_args PROTO((void)); | |
190 | static rtx expand_builtin_apply PROTO((rtx, rtx, rtx)); | |
191 | static void expand_builtin_return PROTO((rtx)); | |
7b8b9722 | 192 | static rtx expand_increment PROTO((tree, int, int)); |
4969d05d RK |
193 | static void preexpand_calls PROTO((tree)); |
194 | static void do_jump_by_parts_greater PROTO((tree, int, rtx, rtx)); | |
195 | static void do_jump_by_parts_equality PROTO((tree, rtx, rtx)); | |
4969d05d RK |
196 | static void do_jump_for_compare PROTO((rtx, rtx, rtx)); |
197 | static rtx compare PROTO((tree, enum rtx_code, enum rtx_code)); | |
198 | static rtx do_store_flag PROTO((tree, rtx, enum machine_mode, int)); | |
bbf6f052 | 199 | |
4fa52007 RK |
200 | /* Record for each mode whether we can move a register directly to or |
201 | from an object of that mode in memory. If we can't, we won't try | |
202 | to use that mode directly when accessing a field of that mode. */ | |
203 | ||
204 | static char direct_load[NUM_MACHINE_MODES]; | |
205 | static char direct_store[NUM_MACHINE_MODES]; | |
206 | ||
7e24ffc9 HPN |
207 | /* If a memory-to-memory move would take MOVE_RATIO or more simple |
208 | move-instruction sequences, we will do a movstr or libcall instead. */ | |
bbf6f052 RK |
209 | |
210 | #ifndef MOVE_RATIO | |
266007a7 | 211 | #if defined (HAVE_movstrqi) || defined (HAVE_movstrhi) || defined (HAVE_movstrsi) || defined (HAVE_movstrdi) || defined (HAVE_movstrti) |
bbf6f052 RK |
212 | #define MOVE_RATIO 2 |
213 | #else | |
996d9dac MM |
214 | /* If we are optimizing for space (-Os), cut down the default move ratio */ |
215 | #define MOVE_RATIO (optimize_size ? 3 : 15) | |
bbf6f052 RK |
216 | #endif |
217 | #endif | |
e87b4f3f | 218 | |
266007a7 | 219 | /* This array records the insn_code of insns to perform block moves. */ |
e6677db3 | 220 | enum insn_code movstr_optab[NUM_MACHINE_MODES]; |
266007a7 | 221 | |
9de08200 RK |
222 | /* This array records the insn_code of insns to perform block clears. */ |
223 | enum insn_code clrstr_optab[NUM_MACHINE_MODES]; | |
224 | ||
0f41302f | 225 | /* SLOW_UNALIGNED_ACCESS is non-zero if unaligned accesses are very slow. */ |
e87b4f3f RS |
226 | |
227 | #ifndef SLOW_UNALIGNED_ACCESS | |
c7a7ac46 | 228 | #define SLOW_UNALIGNED_ACCESS STRICT_ALIGNMENT |
e87b4f3f | 229 | #endif |
0006469d TW |
230 | |
231 | /* Register mappings for target machines without register windows. */ | |
232 | #ifndef INCOMING_REGNO | |
233 | #define INCOMING_REGNO(OUT) (OUT) | |
234 | #endif | |
235 | #ifndef OUTGOING_REGNO | |
236 | #define OUTGOING_REGNO(IN) (IN) | |
237 | #endif | |
bbf6f052 | 238 | \f |
4fa52007 | 239 | /* This is run once per compilation to set up which modes can be used |
266007a7 | 240 | directly in memory and to initialize the block move optab. */ |
4fa52007 RK |
241 | |
242 | void | |
243 | init_expr_once () | |
244 | { | |
245 | rtx insn, pat; | |
246 | enum machine_mode mode; | |
cff48d8f | 247 | int num_clobbers; |
9ec36da5 JL |
248 | rtx mem, mem1; |
249 | char *free_point; | |
250 | ||
251 | start_sequence (); | |
252 | ||
253 | /* Since we are on the permanent obstack, we must be sure we save this | |
254 | spot AFTER we call start_sequence, since it will reuse the rtl it | |
255 | makes. */ | |
256 | free_point = (char *) oballoc (0); | |
257 | ||
e2549997 RS |
258 | /* Try indexing by frame ptr and try by stack ptr. |
259 | It is known that on the Convex the stack ptr isn't a valid index. | |
260 | With luck, one or the other is valid on any machine. */ | |
9ec36da5 JL |
261 | mem = gen_rtx_MEM (VOIDmode, stack_pointer_rtx); |
262 | mem1 = gen_rtx_MEM (VOIDmode, frame_pointer_rtx); | |
4fa52007 | 263 | |
38a448ca | 264 | insn = emit_insn (gen_rtx_SET (0, NULL_RTX, NULL_RTX)); |
4fa52007 RK |
265 | pat = PATTERN (insn); |
266 | ||
267 | for (mode = VOIDmode; (int) mode < NUM_MACHINE_MODES; | |
268 | mode = (enum machine_mode) ((int) mode + 1)) | |
269 | { | |
270 | int regno; | |
271 | rtx reg; | |
4fa52007 RK |
272 | |
273 | direct_load[(int) mode] = direct_store[(int) mode] = 0; | |
274 | PUT_MODE (mem, mode); | |
e2549997 | 275 | PUT_MODE (mem1, mode); |
4fa52007 | 276 | |
e6fe56a4 RK |
277 | /* See if there is some register that can be used in this mode and |
278 | directly loaded or stored from memory. */ | |
279 | ||
7308a047 RS |
280 | if (mode != VOIDmode && mode != BLKmode) |
281 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER | |
282 | && (direct_load[(int) mode] == 0 || direct_store[(int) mode] == 0); | |
283 | regno++) | |
284 | { | |
285 | if (! HARD_REGNO_MODE_OK (regno, mode)) | |
286 | continue; | |
e6fe56a4 | 287 | |
38a448ca | 288 | reg = gen_rtx_REG (mode, regno); |
e6fe56a4 | 289 | |
7308a047 RS |
290 | SET_SRC (pat) = mem; |
291 | SET_DEST (pat) = reg; | |
292 | if (recog (pat, insn, &num_clobbers) >= 0) | |
293 | direct_load[(int) mode] = 1; | |
e6fe56a4 | 294 | |
e2549997 RS |
295 | SET_SRC (pat) = mem1; |
296 | SET_DEST (pat) = reg; | |
297 | if (recog (pat, insn, &num_clobbers) >= 0) | |
298 | direct_load[(int) mode] = 1; | |
299 | ||
7308a047 RS |
300 | SET_SRC (pat) = reg; |
301 | SET_DEST (pat) = mem; | |
302 | if (recog (pat, insn, &num_clobbers) >= 0) | |
303 | direct_store[(int) mode] = 1; | |
e2549997 RS |
304 | |
305 | SET_SRC (pat) = reg; | |
306 | SET_DEST (pat) = mem1; | |
307 | if (recog (pat, insn, &num_clobbers) >= 0) | |
308 | direct_store[(int) mode] = 1; | |
7308a047 | 309 | } |
4fa52007 RK |
310 | } |
311 | ||
cff48d8f RH |
312 | /* Find out if CONSTANT_P_RTX is accepted. */ |
313 | SET_DEST (pat) = gen_rtx_REG (TYPE_MODE (integer_type_node), | |
314 | FIRST_PSEUDO_REGISTER); | |
315 | SET_SRC (pat) = gen_rtx_CONSTANT_P_RTX (TYPE_MODE (integer_type_node), | |
316 | SET_DEST (pat)); | |
317 | if (recog (pat, insn, &num_clobbers) >= 0) | |
318 | can_handle_constant_p = 1; | |
319 | ||
4fa52007 | 320 | end_sequence (); |
9ec36da5 | 321 | obfree (free_point); |
4fa52007 | 322 | } |
cff48d8f | 323 | |
bbf6f052 RK |
324 | /* This is run at the start of compiling a function. */ |
325 | ||
326 | void | |
327 | init_expr () | |
328 | { | |
329 | init_queue (); | |
330 | ||
331 | pending_stack_adjust = 0; | |
332 | inhibit_defer_pop = 0; | |
bbf6f052 | 333 | saveregs_value = 0; |
0006469d | 334 | apply_args_value = 0; |
e87b4f3f | 335 | forced_labels = 0; |
bbf6f052 RK |
336 | } |
337 | ||
338 | /* Save all variables describing the current status into the structure *P. | |
339 | This is used before starting a nested function. */ | |
340 | ||
341 | void | |
342 | save_expr_status (p) | |
343 | struct function *p; | |
344 | { | |
345 | /* Instead of saving the postincrement queue, empty it. */ | |
346 | emit_queue (); | |
347 | ||
348 | p->pending_stack_adjust = pending_stack_adjust; | |
349 | p->inhibit_defer_pop = inhibit_defer_pop; | |
bbf6f052 | 350 | p->saveregs_value = saveregs_value; |
0006469d | 351 | p->apply_args_value = apply_args_value; |
e87b4f3f | 352 | p->forced_labels = forced_labels; |
bbf6f052 RK |
353 | |
354 | pending_stack_adjust = 0; | |
355 | inhibit_defer_pop = 0; | |
bbf6f052 | 356 | saveregs_value = 0; |
0006469d | 357 | apply_args_value = 0; |
e87b4f3f | 358 | forced_labels = 0; |
bbf6f052 RK |
359 | } |
360 | ||
361 | /* Restore all variables describing the current status from the structure *P. | |
362 | This is used after a nested function. */ | |
363 | ||
364 | void | |
365 | restore_expr_status (p) | |
366 | struct function *p; | |
367 | { | |
368 | pending_stack_adjust = p->pending_stack_adjust; | |
369 | inhibit_defer_pop = p->inhibit_defer_pop; | |
bbf6f052 | 370 | saveregs_value = p->saveregs_value; |
0006469d | 371 | apply_args_value = p->apply_args_value; |
e87b4f3f | 372 | forced_labels = p->forced_labels; |
bbf6f052 RK |
373 | } |
374 | \f | |
375 | /* Manage the queue of increment instructions to be output | |
376 | for POSTINCREMENT_EXPR expressions, etc. */ | |
377 | ||
378 | static rtx pending_chain; | |
379 | ||
380 | /* Queue up to increment (or change) VAR later. BODY says how: | |
381 | BODY should be the same thing you would pass to emit_insn | |
382 | to increment right away. It will go to emit_insn later on. | |
383 | ||
384 | The value is a QUEUED expression to be used in place of VAR | |
385 | where you want to guarantee the pre-incrementation value of VAR. */ | |
386 | ||
387 | static rtx | |
388 | enqueue_insn (var, body) | |
389 | rtx var, body; | |
390 | { | |
38a448ca RH |
391 | pending_chain = gen_rtx_QUEUED (GET_MODE (var), |
392 | var, NULL_RTX, NULL_RTX, body, | |
393 | pending_chain); | |
bbf6f052 RK |
394 | return pending_chain; |
395 | } | |
396 | ||
397 | /* Use protect_from_queue to convert a QUEUED expression | |
398 | into something that you can put immediately into an instruction. | |
399 | If the queued incrementation has not happened yet, | |
400 | protect_from_queue returns the variable itself. | |
401 | If the incrementation has happened, protect_from_queue returns a temp | |
402 | that contains a copy of the old value of the variable. | |
403 | ||
404 | Any time an rtx which might possibly be a QUEUED is to be put | |
405 | into an instruction, it must be passed through protect_from_queue first. | |
406 | QUEUED expressions are not meaningful in instructions. | |
407 | ||
408 | Do not pass a value through protect_from_queue and then hold | |
409 | on to it for a while before putting it in an instruction! | |
410 | If the queue is flushed in between, incorrect code will result. */ | |
411 | ||
412 | rtx | |
413 | protect_from_queue (x, modify) | |
414 | register rtx x; | |
415 | int modify; | |
416 | { | |
417 | register RTX_CODE code = GET_CODE (x); | |
418 | ||
419 | #if 0 /* A QUEUED can hang around after the queue is forced out. */ | |
420 | /* Shortcut for most common case. */ | |
421 | if (pending_chain == 0) | |
422 | return x; | |
423 | #endif | |
424 | ||
425 | if (code != QUEUED) | |
426 | { | |
e9baa644 RK |
427 | /* A special hack for read access to (MEM (QUEUED ...)) to facilitate |
428 | use of autoincrement. Make a copy of the contents of the memory | |
429 | location rather than a copy of the address, but not if the value is | |
430 | of mode BLKmode. Don't modify X in place since it might be | |
431 | shared. */ | |
bbf6f052 RK |
432 | if (code == MEM && GET_MODE (x) != BLKmode |
433 | && GET_CODE (XEXP (x, 0)) == QUEUED && !modify) | |
434 | { | |
435 | register rtx y = XEXP (x, 0); | |
38a448ca | 436 | register rtx new = gen_rtx_MEM (GET_MODE (x), QUEUED_VAR (y)); |
e9baa644 RK |
437 | |
438 | MEM_IN_STRUCT_P (new) = MEM_IN_STRUCT_P (x); | |
439 | RTX_UNCHANGING_P (new) = RTX_UNCHANGING_P (x); | |
440 | MEM_VOLATILE_P (new) = MEM_VOLATILE_P (x); | |
41472af8 | 441 | MEM_ALIAS_SET (new) = MEM_ALIAS_SET (x); |
e9baa644 | 442 | |
bbf6f052 RK |
443 | if (QUEUED_INSN (y)) |
444 | { | |
e9baa644 RK |
445 | register rtx temp = gen_reg_rtx (GET_MODE (new)); |
446 | emit_insn_before (gen_move_insn (temp, new), | |
bbf6f052 RK |
447 | QUEUED_INSN (y)); |
448 | return temp; | |
449 | } | |
e9baa644 | 450 | return new; |
bbf6f052 RK |
451 | } |
452 | /* Otherwise, recursively protect the subexpressions of all | |
453 | the kinds of rtx's that can contain a QUEUED. */ | |
454 | if (code == MEM) | |
3f15938e RS |
455 | { |
456 | rtx tem = protect_from_queue (XEXP (x, 0), 0); | |
457 | if (tem != XEXP (x, 0)) | |
458 | { | |
459 | x = copy_rtx (x); | |
460 | XEXP (x, 0) = tem; | |
461 | } | |
462 | } | |
bbf6f052 RK |
463 | else if (code == PLUS || code == MULT) |
464 | { | |
3f15938e RS |
465 | rtx new0 = protect_from_queue (XEXP (x, 0), 0); |
466 | rtx new1 = protect_from_queue (XEXP (x, 1), 0); | |
467 | if (new0 != XEXP (x, 0) || new1 != XEXP (x, 1)) | |
468 | { | |
469 | x = copy_rtx (x); | |
470 | XEXP (x, 0) = new0; | |
471 | XEXP (x, 1) = new1; | |
472 | } | |
bbf6f052 RK |
473 | } |
474 | return x; | |
475 | } | |
476 | /* If the increment has not happened, use the variable itself. */ | |
477 | if (QUEUED_INSN (x) == 0) | |
478 | return QUEUED_VAR (x); | |
479 | /* If the increment has happened and a pre-increment copy exists, | |
480 | use that copy. */ | |
481 | if (QUEUED_COPY (x) != 0) | |
482 | return QUEUED_COPY (x); | |
483 | /* The increment has happened but we haven't set up a pre-increment copy. | |
484 | Set one up now, and use it. */ | |
485 | QUEUED_COPY (x) = gen_reg_rtx (GET_MODE (QUEUED_VAR (x))); | |
486 | emit_insn_before (gen_move_insn (QUEUED_COPY (x), QUEUED_VAR (x)), | |
487 | QUEUED_INSN (x)); | |
488 | return QUEUED_COPY (x); | |
489 | } | |
490 | ||
491 | /* Return nonzero if X contains a QUEUED expression: | |
492 | if it contains anything that will be altered by a queued increment. | |
493 | We handle only combinations of MEM, PLUS, MINUS and MULT operators | |
494 | since memory addresses generally contain only those. */ | |
495 | ||
496 | static int | |
497 | queued_subexp_p (x) | |
498 | rtx x; | |
499 | { | |
500 | register enum rtx_code code = GET_CODE (x); | |
501 | switch (code) | |
502 | { | |
503 | case QUEUED: | |
504 | return 1; | |
505 | case MEM: | |
506 | return queued_subexp_p (XEXP (x, 0)); | |
507 | case MULT: | |
508 | case PLUS: | |
509 | case MINUS: | |
e9a25f70 JL |
510 | return (queued_subexp_p (XEXP (x, 0)) |
511 | || queued_subexp_p (XEXP (x, 1))); | |
512 | default: | |
513 | return 0; | |
bbf6f052 | 514 | } |
bbf6f052 RK |
515 | } |
516 | ||
517 | /* Perform all the pending incrementations. */ | |
518 | ||
519 | void | |
520 | emit_queue () | |
521 | { | |
522 | register rtx p; | |
381127e8 | 523 | while ((p = pending_chain)) |
bbf6f052 | 524 | { |
41b083c4 R |
525 | rtx body = QUEUED_BODY (p); |
526 | ||
527 | if (GET_CODE (body) == SEQUENCE) | |
528 | { | |
529 | QUEUED_INSN (p) = XVECEXP (QUEUED_BODY (p), 0, 0); | |
530 | emit_insn (QUEUED_BODY (p)); | |
531 | } | |
532 | else | |
533 | QUEUED_INSN (p) = emit_insn (QUEUED_BODY (p)); | |
bbf6f052 RK |
534 | pending_chain = QUEUED_NEXT (p); |
535 | } | |
536 | } | |
537 | ||
538 | static void | |
539 | init_queue () | |
540 | { | |
541 | if (pending_chain) | |
542 | abort (); | |
543 | } | |
544 | \f | |
545 | /* Copy data from FROM to TO, where the machine modes are not the same. | |
546 | Both modes may be integer, or both may be floating. | |
547 | UNSIGNEDP should be nonzero if FROM is an unsigned type. | |
548 | This causes zero-extension instead of sign-extension. */ | |
549 | ||
550 | void | |
551 | convert_move (to, from, unsignedp) | |
552 | register rtx to, from; | |
553 | int unsignedp; | |
554 | { | |
555 | enum machine_mode to_mode = GET_MODE (to); | |
556 | enum machine_mode from_mode = GET_MODE (from); | |
557 | int to_real = GET_MODE_CLASS (to_mode) == MODE_FLOAT; | |
558 | int from_real = GET_MODE_CLASS (from_mode) == MODE_FLOAT; | |
559 | enum insn_code code; | |
560 | rtx libcall; | |
561 | ||
562 | /* rtx code for making an equivalent value. */ | |
563 | enum rtx_code equiv_code = (unsignedp ? ZERO_EXTEND : SIGN_EXTEND); | |
564 | ||
565 | to = protect_from_queue (to, 1); | |
566 | from = protect_from_queue (from, 0); | |
567 | ||
568 | if (to_real != from_real) | |
569 | abort (); | |
570 | ||
1499e0a8 RK |
571 | /* If FROM is a SUBREG that indicates that we have already done at least |
572 | the required extension, strip it. We don't handle such SUBREGs as | |
573 | TO here. */ | |
574 | ||
575 | if (GET_CODE (from) == SUBREG && SUBREG_PROMOTED_VAR_P (from) | |
576 | && (GET_MODE_SIZE (GET_MODE (SUBREG_REG (from))) | |
577 | >= GET_MODE_SIZE (to_mode)) | |
578 | && SUBREG_PROMOTED_UNSIGNED_P (from) == unsignedp) | |
579 | from = gen_lowpart (to_mode, from), from_mode = to_mode; | |
580 | ||
581 | if (GET_CODE (to) == SUBREG && SUBREG_PROMOTED_VAR_P (to)) | |
582 | abort (); | |
583 | ||
bbf6f052 RK |
584 | if (to_mode == from_mode |
585 | || (from_mode == VOIDmode && CONSTANT_P (from))) | |
586 | { | |
587 | emit_move_insn (to, from); | |
588 | return; | |
589 | } | |
590 | ||
591 | if (to_real) | |
592 | { | |
81d79e2c RS |
593 | rtx value; |
594 | ||
2b01c326 | 595 | if (GET_MODE_BITSIZE (from_mode) < GET_MODE_BITSIZE (to_mode)) |
b424402e | 596 | { |
2b01c326 RK |
597 | /* Try converting directly if the insn is supported. */ |
598 | if ((code = can_extend_p (to_mode, from_mode, 0)) | |
599 | != CODE_FOR_nothing) | |
600 | { | |
601 | emit_unop_insn (code, to, from, UNKNOWN); | |
602 | return; | |
603 | } | |
bbf6f052 | 604 | } |
2b01c326 | 605 | |
b424402e RS |
606 | #ifdef HAVE_trunchfqf2 |
607 | if (HAVE_trunchfqf2 && from_mode == HFmode && to_mode == QFmode) | |
608 | { | |
609 | emit_unop_insn (CODE_FOR_trunchfqf2, to, from, UNKNOWN); | |
610 | return; | |
611 | } | |
612 | #endif | |
704af6a1 JL |
613 | #ifdef HAVE_trunctqfqf2 |
614 | if (HAVE_trunctqfqf2 && from_mode == TQFmode && to_mode == QFmode) | |
615 | { | |
616 | emit_unop_insn (CODE_FOR_trunctqfqf2, to, from, UNKNOWN); | |
617 | return; | |
618 | } | |
619 | #endif | |
b424402e RS |
620 | #ifdef HAVE_truncsfqf2 |
621 | if (HAVE_truncsfqf2 && from_mode == SFmode && to_mode == QFmode) | |
622 | { | |
623 | emit_unop_insn (CODE_FOR_truncsfqf2, to, from, UNKNOWN); | |
624 | return; | |
625 | } | |
626 | #endif | |
627 | #ifdef HAVE_truncdfqf2 | |
628 | if (HAVE_truncdfqf2 && from_mode == DFmode && to_mode == QFmode) | |
629 | { | |
630 | emit_unop_insn (CODE_FOR_truncdfqf2, to, from, UNKNOWN); | |
631 | return; | |
632 | } | |
633 | #endif | |
634 | #ifdef HAVE_truncxfqf2 | |
635 | if (HAVE_truncxfqf2 && from_mode == XFmode && to_mode == QFmode) | |
636 | { | |
637 | emit_unop_insn (CODE_FOR_truncxfqf2, to, from, UNKNOWN); | |
638 | return; | |
639 | } | |
640 | #endif | |
641 | #ifdef HAVE_trunctfqf2 | |
642 | if (HAVE_trunctfqf2 && from_mode == TFmode && to_mode == QFmode) | |
643 | { | |
644 | emit_unop_insn (CODE_FOR_trunctfqf2, to, from, UNKNOWN); | |
645 | return; | |
646 | } | |
647 | #endif | |
03747aa3 RK |
648 | |
649 | #ifdef HAVE_trunctqfhf2 | |
650 | if (HAVE_trunctqfhf2 && from_mode == TQFmode && to_mode == HFmode) | |
651 | { | |
652 | emit_unop_insn (CODE_FOR_trunctqfhf2, to, from, UNKNOWN); | |
653 | return; | |
654 | } | |
655 | #endif | |
b424402e RS |
656 | #ifdef HAVE_truncsfhf2 |
657 | if (HAVE_truncsfhf2 && from_mode == SFmode && to_mode == HFmode) | |
658 | { | |
659 | emit_unop_insn (CODE_FOR_truncsfhf2, to, from, UNKNOWN); | |
660 | return; | |
661 | } | |
662 | #endif | |
663 | #ifdef HAVE_truncdfhf2 | |
664 | if (HAVE_truncdfhf2 && from_mode == DFmode && to_mode == HFmode) | |
665 | { | |
666 | emit_unop_insn (CODE_FOR_truncdfhf2, to, from, UNKNOWN); | |
667 | return; | |
668 | } | |
669 | #endif | |
670 | #ifdef HAVE_truncxfhf2 | |
671 | if (HAVE_truncxfhf2 && from_mode == XFmode && to_mode == HFmode) | |
672 | { | |
673 | emit_unop_insn (CODE_FOR_truncxfhf2, to, from, UNKNOWN); | |
674 | return; | |
675 | } | |
676 | #endif | |
677 | #ifdef HAVE_trunctfhf2 | |
678 | if (HAVE_trunctfhf2 && from_mode == TFmode && to_mode == HFmode) | |
679 | { | |
680 | emit_unop_insn (CODE_FOR_trunctfhf2, to, from, UNKNOWN); | |
681 | return; | |
682 | } | |
683 | #endif | |
2b01c326 RK |
684 | |
685 | #ifdef HAVE_truncsftqf2 | |
686 | if (HAVE_truncsftqf2 && from_mode == SFmode && to_mode == TQFmode) | |
687 | { | |
688 | emit_unop_insn (CODE_FOR_truncsftqf2, to, from, UNKNOWN); | |
689 | return; | |
690 | } | |
691 | #endif | |
692 | #ifdef HAVE_truncdftqf2 | |
693 | if (HAVE_truncdftqf2 && from_mode == DFmode && to_mode == TQFmode) | |
694 | { | |
695 | emit_unop_insn (CODE_FOR_truncdftqf2, to, from, UNKNOWN); | |
696 | return; | |
697 | } | |
698 | #endif | |
699 | #ifdef HAVE_truncxftqf2 | |
700 | if (HAVE_truncxftqf2 && from_mode == XFmode && to_mode == TQFmode) | |
701 | { | |
702 | emit_unop_insn (CODE_FOR_truncxftqf2, to, from, UNKNOWN); | |
703 | return; | |
704 | } | |
705 | #endif | |
706 | #ifdef HAVE_trunctftqf2 | |
707 | if (HAVE_trunctftqf2 && from_mode == TFmode && to_mode == TQFmode) | |
708 | { | |
709 | emit_unop_insn (CODE_FOR_trunctftqf2, to, from, UNKNOWN); | |
710 | return; | |
711 | } | |
712 | #endif | |
713 | ||
bbf6f052 RK |
714 | #ifdef HAVE_truncdfsf2 |
715 | if (HAVE_truncdfsf2 && from_mode == DFmode && to_mode == SFmode) | |
716 | { | |
717 | emit_unop_insn (CODE_FOR_truncdfsf2, to, from, UNKNOWN); | |
718 | return; | |
719 | } | |
720 | #endif | |
b092b471 JW |
721 | #ifdef HAVE_truncxfsf2 |
722 | if (HAVE_truncxfsf2 && from_mode == XFmode && to_mode == SFmode) | |
723 | { | |
724 | emit_unop_insn (CODE_FOR_truncxfsf2, to, from, UNKNOWN); | |
725 | return; | |
726 | } | |
727 | #endif | |
bbf6f052 RK |
728 | #ifdef HAVE_trunctfsf2 |
729 | if (HAVE_trunctfsf2 && from_mode == TFmode && to_mode == SFmode) | |
730 | { | |
731 | emit_unop_insn (CODE_FOR_trunctfsf2, to, from, UNKNOWN); | |
732 | return; | |
733 | } | |
734 | #endif | |
b092b471 JW |
735 | #ifdef HAVE_truncxfdf2 |
736 | if (HAVE_truncxfdf2 && from_mode == XFmode && to_mode == DFmode) | |
737 | { | |
738 | emit_unop_insn (CODE_FOR_truncxfdf2, to, from, UNKNOWN); | |
739 | return; | |
740 | } | |
741 | #endif | |
bbf6f052 RK |
742 | #ifdef HAVE_trunctfdf2 |
743 | if (HAVE_trunctfdf2 && from_mode == TFmode && to_mode == DFmode) | |
744 | { | |
745 | emit_unop_insn (CODE_FOR_trunctfdf2, to, from, UNKNOWN); | |
746 | return; | |
747 | } | |
748 | #endif | |
749 | ||
b092b471 JW |
750 | libcall = (rtx) 0; |
751 | switch (from_mode) | |
752 | { | |
753 | case SFmode: | |
754 | switch (to_mode) | |
755 | { | |
756 | case DFmode: | |
757 | libcall = extendsfdf2_libfunc; | |
758 | break; | |
759 | ||
760 | case XFmode: | |
761 | libcall = extendsfxf2_libfunc; | |
762 | break; | |
763 | ||
764 | case TFmode: | |
765 | libcall = extendsftf2_libfunc; | |
766 | break; | |
e9a25f70 JL |
767 | |
768 | default: | |
769 | break; | |
b092b471 JW |
770 | } |
771 | break; | |
772 | ||
773 | case DFmode: | |
774 | switch (to_mode) | |
775 | { | |
776 | case SFmode: | |
777 | libcall = truncdfsf2_libfunc; | |
778 | break; | |
779 | ||
780 | case XFmode: | |
781 | libcall = extenddfxf2_libfunc; | |
782 | break; | |
783 | ||
784 | case TFmode: | |
785 | libcall = extenddftf2_libfunc; | |
786 | break; | |
e9a25f70 JL |
787 | |
788 | default: | |
789 | break; | |
b092b471 JW |
790 | } |
791 | break; | |
792 | ||
793 | case XFmode: | |
794 | switch (to_mode) | |
795 | { | |
796 | case SFmode: | |
797 | libcall = truncxfsf2_libfunc; | |
798 | break; | |
799 | ||
800 | case DFmode: | |
801 | libcall = truncxfdf2_libfunc; | |
802 | break; | |
e9a25f70 JL |
803 | |
804 | default: | |
805 | break; | |
b092b471 JW |
806 | } |
807 | break; | |
808 | ||
809 | case TFmode: | |
810 | switch (to_mode) | |
811 | { | |
812 | case SFmode: | |
813 | libcall = trunctfsf2_libfunc; | |
814 | break; | |
815 | ||
816 | case DFmode: | |
817 | libcall = trunctfdf2_libfunc; | |
818 | break; | |
e9a25f70 JL |
819 | |
820 | default: | |
821 | break; | |
b092b471 JW |
822 | } |
823 | break; | |
e9a25f70 JL |
824 | |
825 | default: | |
826 | break; | |
b092b471 JW |
827 | } |
828 | ||
829 | if (libcall == (rtx) 0) | |
830 | /* This conversion is not implemented yet. */ | |
bbf6f052 RK |
831 | abort (); |
832 | ||
81d79e2c RS |
833 | value = emit_library_call_value (libcall, NULL_RTX, 1, to_mode, |
834 | 1, from, from_mode); | |
835 | emit_move_insn (to, value); | |
bbf6f052 RK |
836 | return; |
837 | } | |
838 | ||
839 | /* Now both modes are integers. */ | |
840 | ||
841 | /* Handle expanding beyond a word. */ | |
842 | if (GET_MODE_BITSIZE (from_mode) < GET_MODE_BITSIZE (to_mode) | |
843 | && GET_MODE_BITSIZE (to_mode) > BITS_PER_WORD) | |
844 | { | |
845 | rtx insns; | |
846 | rtx lowpart; | |
847 | rtx fill_value; | |
848 | rtx lowfrom; | |
849 | int i; | |
850 | enum machine_mode lowpart_mode; | |
851 | int nwords = CEIL (GET_MODE_SIZE (to_mode), UNITS_PER_WORD); | |
852 | ||
853 | /* Try converting directly if the insn is supported. */ | |
854 | if ((code = can_extend_p (to_mode, from_mode, unsignedp)) | |
855 | != CODE_FOR_nothing) | |
856 | { | |
cd1b4b44 RK |
857 | /* If FROM is a SUBREG, put it into a register. Do this |
858 | so that we always generate the same set of insns for | |
859 | better cse'ing; if an intermediate assignment occurred, | |
860 | we won't be doing the operation directly on the SUBREG. */ | |
861 | if (optimize > 0 && GET_CODE (from) == SUBREG) | |
862 | from = force_reg (from_mode, from); | |
bbf6f052 RK |
863 | emit_unop_insn (code, to, from, equiv_code); |
864 | return; | |
865 | } | |
866 | /* Next, try converting via full word. */ | |
867 | else if (GET_MODE_BITSIZE (from_mode) < BITS_PER_WORD | |
868 | && ((code = can_extend_p (to_mode, word_mode, unsignedp)) | |
869 | != CODE_FOR_nothing)) | |
870 | { | |
a81fee56 | 871 | if (GET_CODE (to) == REG) |
38a448ca | 872 | emit_insn (gen_rtx_CLOBBER (VOIDmode, to)); |
bbf6f052 RK |
873 | convert_move (gen_lowpart (word_mode, to), from, unsignedp); |
874 | emit_unop_insn (code, to, | |
875 | gen_lowpart (word_mode, to), equiv_code); | |
876 | return; | |
877 | } | |
878 | ||
879 | /* No special multiword conversion insn; do it by hand. */ | |
880 | start_sequence (); | |
881 | ||
5c5033c3 RK |
882 | /* Since we will turn this into a no conflict block, we must ensure |
883 | that the source does not overlap the target. */ | |
884 | ||
885 | if (reg_overlap_mentioned_p (to, from)) | |
886 | from = force_reg (from_mode, from); | |
887 | ||
bbf6f052 RK |
888 | /* Get a copy of FROM widened to a word, if necessary. */ |
889 | if (GET_MODE_BITSIZE (from_mode) < BITS_PER_WORD) | |
890 | lowpart_mode = word_mode; | |
891 | else | |
892 | lowpart_mode = from_mode; | |
893 | ||
894 | lowfrom = convert_to_mode (lowpart_mode, from, unsignedp); | |
895 | ||
896 | lowpart = gen_lowpart (lowpart_mode, to); | |
897 | emit_move_insn (lowpart, lowfrom); | |
898 | ||
899 | /* Compute the value to put in each remaining word. */ | |
900 | if (unsignedp) | |
901 | fill_value = const0_rtx; | |
902 | else | |
903 | { | |
904 | #ifdef HAVE_slt | |
905 | if (HAVE_slt | |
906 | && insn_operand_mode[(int) CODE_FOR_slt][0] == word_mode | |
907 | && STORE_FLAG_VALUE == -1) | |
908 | { | |
906c4e36 RK |
909 | emit_cmp_insn (lowfrom, const0_rtx, NE, NULL_RTX, |
910 | lowpart_mode, 0, 0); | |
bbf6f052 RK |
911 | fill_value = gen_reg_rtx (word_mode); |
912 | emit_insn (gen_slt (fill_value)); | |
913 | } | |
914 | else | |
915 | #endif | |
916 | { | |
917 | fill_value | |
918 | = expand_shift (RSHIFT_EXPR, lowpart_mode, lowfrom, | |
919 | size_int (GET_MODE_BITSIZE (lowpart_mode) - 1), | |
906c4e36 | 920 | NULL_RTX, 0); |
bbf6f052 RK |
921 | fill_value = convert_to_mode (word_mode, fill_value, 1); |
922 | } | |
923 | } | |
924 | ||
925 | /* Fill the remaining words. */ | |
926 | for (i = GET_MODE_SIZE (lowpart_mode) / UNITS_PER_WORD; i < nwords; i++) | |
927 | { | |
928 | int index = (WORDS_BIG_ENDIAN ? nwords - i - 1 : i); | |
929 | rtx subword = operand_subword (to, index, 1, to_mode); | |
930 | ||
931 | if (subword == 0) | |
932 | abort (); | |
933 | ||
934 | if (fill_value != subword) | |
935 | emit_move_insn (subword, fill_value); | |
936 | } | |
937 | ||
938 | insns = get_insns (); | |
939 | end_sequence (); | |
940 | ||
906c4e36 | 941 | emit_no_conflict_block (insns, to, from, NULL_RTX, |
38a448ca | 942 | gen_rtx_fmt_e (equiv_code, to_mode, copy_rtx (from))); |
bbf6f052 RK |
943 | return; |
944 | } | |
945 | ||
d3c64ee3 RS |
946 | /* Truncating multi-word to a word or less. */ |
947 | if (GET_MODE_BITSIZE (from_mode) > BITS_PER_WORD | |
948 | && GET_MODE_BITSIZE (to_mode) <= BITS_PER_WORD) | |
bbf6f052 | 949 | { |
431a6eca JW |
950 | if (!((GET_CODE (from) == MEM |
951 | && ! MEM_VOLATILE_P (from) | |
952 | && direct_load[(int) to_mode] | |
953 | && ! mode_dependent_address_p (XEXP (from, 0))) | |
954 | || GET_CODE (from) == REG | |
955 | || GET_CODE (from) == SUBREG)) | |
956 | from = force_reg (from_mode, from); | |
bbf6f052 RK |
957 | convert_move (to, gen_lowpart (word_mode, from), 0); |
958 | return; | |
959 | } | |
960 | ||
961 | /* Handle pointer conversion */ /* SPEE 900220 */ | |
e5e809f4 JL |
962 | if (to_mode == PQImode) |
963 | { | |
964 | if (from_mode != QImode) | |
965 | from = convert_to_mode (QImode, from, unsignedp); | |
966 | ||
967 | #ifdef HAVE_truncqipqi2 | |
968 | if (HAVE_truncqipqi2) | |
969 | { | |
970 | emit_unop_insn (CODE_FOR_truncqipqi2, to, from, UNKNOWN); | |
971 | return; | |
972 | } | |
973 | #endif /* HAVE_truncqipqi2 */ | |
974 | abort (); | |
975 | } | |
976 | ||
977 | if (from_mode == PQImode) | |
978 | { | |
979 | if (to_mode != QImode) | |
980 | { | |
981 | from = convert_to_mode (QImode, from, unsignedp); | |
982 | from_mode = QImode; | |
983 | } | |
984 | else | |
985 | { | |
986 | #ifdef HAVE_extendpqiqi2 | |
987 | if (HAVE_extendpqiqi2) | |
988 | { | |
989 | emit_unop_insn (CODE_FOR_extendpqiqi2, to, from, UNKNOWN); | |
990 | return; | |
991 | } | |
992 | #endif /* HAVE_extendpqiqi2 */ | |
993 | abort (); | |
994 | } | |
995 | } | |
996 | ||
bbf6f052 RK |
997 | if (to_mode == PSImode) |
998 | { | |
999 | if (from_mode != SImode) | |
1000 | from = convert_to_mode (SImode, from, unsignedp); | |
1001 | ||
1f584163 DE |
1002 | #ifdef HAVE_truncsipsi2 |
1003 | if (HAVE_truncsipsi2) | |
bbf6f052 | 1004 | { |
1f584163 | 1005 | emit_unop_insn (CODE_FOR_truncsipsi2, to, from, UNKNOWN); |
bbf6f052 RK |
1006 | return; |
1007 | } | |
1f584163 | 1008 | #endif /* HAVE_truncsipsi2 */ |
bbf6f052 RK |
1009 | abort (); |
1010 | } | |
1011 | ||
1012 | if (from_mode == PSImode) | |
1013 | { | |
1014 | if (to_mode != SImode) | |
1015 | { | |
1016 | from = convert_to_mode (SImode, from, unsignedp); | |
1017 | from_mode = SImode; | |
1018 | } | |
1019 | else | |
1020 | { | |
1f584163 DE |
1021 | #ifdef HAVE_extendpsisi2 |
1022 | if (HAVE_extendpsisi2) | |
bbf6f052 | 1023 | { |
1f584163 | 1024 | emit_unop_insn (CODE_FOR_extendpsisi2, to, from, UNKNOWN); |
bbf6f052 RK |
1025 | return; |
1026 | } | |
1f584163 | 1027 | #endif /* HAVE_extendpsisi2 */ |
bbf6f052 RK |
1028 | abort (); |
1029 | } | |
1030 | } | |
1031 | ||
0407367d RK |
1032 | if (to_mode == PDImode) |
1033 | { | |
1034 | if (from_mode != DImode) | |
1035 | from = convert_to_mode (DImode, from, unsignedp); | |
1036 | ||
1037 | #ifdef HAVE_truncdipdi2 | |
1038 | if (HAVE_truncdipdi2) | |
1039 | { | |
1040 | emit_unop_insn (CODE_FOR_truncdipdi2, to, from, UNKNOWN); | |
1041 | return; | |
1042 | } | |
1043 | #endif /* HAVE_truncdipdi2 */ | |
1044 | abort (); | |
1045 | } | |
1046 | ||
1047 | if (from_mode == PDImode) | |
1048 | { | |
1049 | if (to_mode != DImode) | |
1050 | { | |
1051 | from = convert_to_mode (DImode, from, unsignedp); | |
1052 | from_mode = DImode; | |
1053 | } | |
1054 | else | |
1055 | { | |
1056 | #ifdef HAVE_extendpdidi2 | |
1057 | if (HAVE_extendpdidi2) | |
1058 | { | |
1059 | emit_unop_insn (CODE_FOR_extendpdidi2, to, from, UNKNOWN); | |
1060 | return; | |
1061 | } | |
1062 | #endif /* HAVE_extendpdidi2 */ | |
1063 | abort (); | |
1064 | } | |
1065 | } | |
1066 | ||
bbf6f052 RK |
1067 | /* Now follow all the conversions between integers |
1068 | no more than a word long. */ | |
1069 | ||
1070 | /* For truncation, usually we can just refer to FROM in a narrower mode. */ | |
1071 | if (GET_MODE_BITSIZE (to_mode) < GET_MODE_BITSIZE (from_mode) | |
1072 | && TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (to_mode), | |
d3c64ee3 | 1073 | GET_MODE_BITSIZE (from_mode))) |
bbf6f052 | 1074 | { |
d3c64ee3 RS |
1075 | if (!((GET_CODE (from) == MEM |
1076 | && ! MEM_VOLATILE_P (from) | |
1077 | && direct_load[(int) to_mode] | |
1078 | && ! mode_dependent_address_p (XEXP (from, 0))) | |
1079 | || GET_CODE (from) == REG | |
1080 | || GET_CODE (from) == SUBREG)) | |
1081 | from = force_reg (from_mode, from); | |
34aa3599 RK |
1082 | if (GET_CODE (from) == REG && REGNO (from) < FIRST_PSEUDO_REGISTER |
1083 | && ! HARD_REGNO_MODE_OK (REGNO (from), to_mode)) | |
1084 | from = copy_to_reg (from); | |
bbf6f052 RK |
1085 | emit_move_insn (to, gen_lowpart (to_mode, from)); |
1086 | return; | |
1087 | } | |
1088 | ||
d3c64ee3 | 1089 | /* Handle extension. */ |
bbf6f052 RK |
1090 | if (GET_MODE_BITSIZE (to_mode) > GET_MODE_BITSIZE (from_mode)) |
1091 | { | |
1092 | /* Convert directly if that works. */ | |
1093 | if ((code = can_extend_p (to_mode, from_mode, unsignedp)) | |
1094 | != CODE_FOR_nothing) | |
1095 | { | |
1096 | emit_unop_insn (code, to, from, equiv_code); | |
1097 | return; | |
1098 | } | |
1099 | else | |
1100 | { | |
1101 | enum machine_mode intermediate; | |
1102 | ||
1103 | /* Search for a mode to convert via. */ | |
1104 | for (intermediate = from_mode; intermediate != VOIDmode; | |
1105 | intermediate = GET_MODE_WIDER_MODE (intermediate)) | |
930b4e39 RK |
1106 | if (((can_extend_p (to_mode, intermediate, unsignedp) |
1107 | != CODE_FOR_nothing) | |
1108 | || (GET_MODE_SIZE (to_mode) < GET_MODE_SIZE (intermediate) | |
1109 | && TRULY_NOOP_TRUNCATION (to_mode, intermediate))) | |
bbf6f052 RK |
1110 | && (can_extend_p (intermediate, from_mode, unsignedp) |
1111 | != CODE_FOR_nothing)) | |
1112 | { | |
1113 | convert_move (to, convert_to_mode (intermediate, from, | |
1114 | unsignedp), unsignedp); | |
1115 | return; | |
1116 | } | |
1117 | ||
1118 | /* No suitable intermediate mode. */ | |
1119 | abort (); | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | /* Support special truncate insns for certain modes. */ | |
1124 | ||
1125 | if (from_mode == DImode && to_mode == SImode) | |
1126 | { | |
1127 | #ifdef HAVE_truncdisi2 | |
1128 | if (HAVE_truncdisi2) | |
1129 | { | |
1130 | emit_unop_insn (CODE_FOR_truncdisi2, to, from, UNKNOWN); | |
1131 | return; | |
1132 | } | |
1133 | #endif | |
1134 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1135 | return; | |
1136 | } | |
1137 | ||
1138 | if (from_mode == DImode && to_mode == HImode) | |
1139 | { | |
1140 | #ifdef HAVE_truncdihi2 | |
1141 | if (HAVE_truncdihi2) | |
1142 | { | |
1143 | emit_unop_insn (CODE_FOR_truncdihi2, to, from, UNKNOWN); | |
1144 | return; | |
1145 | } | |
1146 | #endif | |
1147 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1148 | return; | |
1149 | } | |
1150 | ||
1151 | if (from_mode == DImode && to_mode == QImode) | |
1152 | { | |
1153 | #ifdef HAVE_truncdiqi2 | |
1154 | if (HAVE_truncdiqi2) | |
1155 | { | |
1156 | emit_unop_insn (CODE_FOR_truncdiqi2, to, from, UNKNOWN); | |
1157 | return; | |
1158 | } | |
1159 | #endif | |
1160 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1161 | return; | |
1162 | } | |
1163 | ||
1164 | if (from_mode == SImode && to_mode == HImode) | |
1165 | { | |
1166 | #ifdef HAVE_truncsihi2 | |
1167 | if (HAVE_truncsihi2) | |
1168 | { | |
1169 | emit_unop_insn (CODE_FOR_truncsihi2, to, from, UNKNOWN); | |
1170 | return; | |
1171 | } | |
1172 | #endif | |
1173 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1174 | return; | |
1175 | } | |
1176 | ||
1177 | if (from_mode == SImode && to_mode == QImode) | |
1178 | { | |
1179 | #ifdef HAVE_truncsiqi2 | |
1180 | if (HAVE_truncsiqi2) | |
1181 | { | |
1182 | emit_unop_insn (CODE_FOR_truncsiqi2, to, from, UNKNOWN); | |
1183 | return; | |
1184 | } | |
1185 | #endif | |
1186 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1187 | return; | |
1188 | } | |
1189 | ||
1190 | if (from_mode == HImode && to_mode == QImode) | |
1191 | { | |
1192 | #ifdef HAVE_trunchiqi2 | |
1193 | if (HAVE_trunchiqi2) | |
1194 | { | |
1195 | emit_unop_insn (CODE_FOR_trunchiqi2, to, from, UNKNOWN); | |
1196 | return; | |
1197 | } | |
1198 | #endif | |
1199 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1200 | return; | |
1201 | } | |
1202 | ||
b9bcad65 RK |
1203 | if (from_mode == TImode && to_mode == DImode) |
1204 | { | |
1205 | #ifdef HAVE_trunctidi2 | |
1206 | if (HAVE_trunctidi2) | |
1207 | { | |
1208 | emit_unop_insn (CODE_FOR_trunctidi2, to, from, UNKNOWN); | |
1209 | return; | |
1210 | } | |
1211 | #endif | |
1212 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1213 | return; | |
1214 | } | |
1215 | ||
1216 | if (from_mode == TImode && to_mode == SImode) | |
1217 | { | |
1218 | #ifdef HAVE_trunctisi2 | |
1219 | if (HAVE_trunctisi2) | |
1220 | { | |
1221 | emit_unop_insn (CODE_FOR_trunctisi2, to, from, UNKNOWN); | |
1222 | return; | |
1223 | } | |
1224 | #endif | |
1225 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1226 | return; | |
1227 | } | |
1228 | ||
1229 | if (from_mode == TImode && to_mode == HImode) | |
1230 | { | |
1231 | #ifdef HAVE_trunctihi2 | |
1232 | if (HAVE_trunctihi2) | |
1233 | { | |
1234 | emit_unop_insn (CODE_FOR_trunctihi2, to, from, UNKNOWN); | |
1235 | return; | |
1236 | } | |
1237 | #endif | |
1238 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1239 | return; | |
1240 | } | |
1241 | ||
1242 | if (from_mode == TImode && to_mode == QImode) | |
1243 | { | |
1244 | #ifdef HAVE_trunctiqi2 | |
1245 | if (HAVE_trunctiqi2) | |
1246 | { | |
1247 | emit_unop_insn (CODE_FOR_trunctiqi2, to, from, UNKNOWN); | |
1248 | return; | |
1249 | } | |
1250 | #endif | |
1251 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1252 | return; | |
1253 | } | |
1254 | ||
bbf6f052 RK |
1255 | /* Handle truncation of volatile memrefs, and so on; |
1256 | the things that couldn't be truncated directly, | |
1257 | and for which there was no special instruction. */ | |
1258 | if (GET_MODE_BITSIZE (to_mode) < GET_MODE_BITSIZE (from_mode)) | |
1259 | { | |
1260 | rtx temp = force_reg (to_mode, gen_lowpart (to_mode, from)); | |
1261 | emit_move_insn (to, temp); | |
1262 | return; | |
1263 | } | |
1264 | ||
1265 | /* Mode combination is not recognized. */ | |
1266 | abort (); | |
1267 | } | |
1268 | ||
1269 | /* Return an rtx for a value that would result | |
1270 | from converting X to mode MODE. | |
1271 | Both X and MODE may be floating, or both integer. | |
1272 | UNSIGNEDP is nonzero if X is an unsigned value. | |
1273 | This can be done by referring to a part of X in place | |
5d901c31 RS |
1274 | or by copying to a new temporary with conversion. |
1275 | ||
1276 | This function *must not* call protect_from_queue | |
1277 | except when putting X into an insn (in which case convert_move does it). */ | |
bbf6f052 RK |
1278 | |
1279 | rtx | |
1280 | convert_to_mode (mode, x, unsignedp) | |
1281 | enum machine_mode mode; | |
1282 | rtx x; | |
1283 | int unsignedp; | |
5ffe63ed RS |
1284 | { |
1285 | return convert_modes (mode, VOIDmode, x, unsignedp); | |
1286 | } | |
1287 | ||
1288 | /* Return an rtx for a value that would result | |
1289 | from converting X from mode OLDMODE to mode MODE. | |
1290 | Both modes may be floating, or both integer. | |
1291 | UNSIGNEDP is nonzero if X is an unsigned value. | |
1292 | ||
1293 | This can be done by referring to a part of X in place | |
1294 | or by copying to a new temporary with conversion. | |
1295 | ||
1296 | You can give VOIDmode for OLDMODE, if you are sure X has a nonvoid mode. | |
1297 | ||
1298 | This function *must not* call protect_from_queue | |
1299 | except when putting X into an insn (in which case convert_move does it). */ | |
1300 | ||
1301 | rtx | |
1302 | convert_modes (mode, oldmode, x, unsignedp) | |
1303 | enum machine_mode mode, oldmode; | |
1304 | rtx x; | |
1305 | int unsignedp; | |
bbf6f052 RK |
1306 | { |
1307 | register rtx temp; | |
5ffe63ed | 1308 | |
1499e0a8 RK |
1309 | /* If FROM is a SUBREG that indicates that we have already done at least |
1310 | the required extension, strip it. */ | |
1311 | ||
1312 | if (GET_CODE (x) == SUBREG && SUBREG_PROMOTED_VAR_P (x) | |
1313 | && GET_MODE_SIZE (GET_MODE (SUBREG_REG (x))) >= GET_MODE_SIZE (mode) | |
1314 | && SUBREG_PROMOTED_UNSIGNED_P (x) == unsignedp) | |
1315 | x = gen_lowpart (mode, x); | |
bbf6f052 | 1316 | |
64791b18 RK |
1317 | if (GET_MODE (x) != VOIDmode) |
1318 | oldmode = GET_MODE (x); | |
1319 | ||
5ffe63ed | 1320 | if (mode == oldmode) |
bbf6f052 RK |
1321 | return x; |
1322 | ||
1323 | /* There is one case that we must handle specially: If we are converting | |
906c4e36 | 1324 | a CONST_INT into a mode whose size is twice HOST_BITS_PER_WIDE_INT and |
bbf6f052 RK |
1325 | we are to interpret the constant as unsigned, gen_lowpart will do |
1326 | the wrong if the constant appears negative. What we want to do is | |
1327 | make the high-order word of the constant zero, not all ones. */ | |
1328 | ||
1329 | if (unsignedp && GET_MODE_CLASS (mode) == MODE_INT | |
906c4e36 | 1330 | && GET_MODE_BITSIZE (mode) == 2 * HOST_BITS_PER_WIDE_INT |
bbf6f052 | 1331 | && GET_CODE (x) == CONST_INT && INTVAL (x) < 0) |
96ff8a16 ILT |
1332 | { |
1333 | HOST_WIDE_INT val = INTVAL (x); | |
1334 | ||
1335 | if (oldmode != VOIDmode | |
1336 | && HOST_BITS_PER_WIDE_INT > GET_MODE_BITSIZE (oldmode)) | |
1337 | { | |
1338 | int width = GET_MODE_BITSIZE (oldmode); | |
1339 | ||
1340 | /* We need to zero extend VAL. */ | |
1341 | val &= ((HOST_WIDE_INT) 1 << width) - 1; | |
1342 | } | |
1343 | ||
1344 | return immed_double_const (val, (HOST_WIDE_INT) 0, mode); | |
1345 | } | |
bbf6f052 RK |
1346 | |
1347 | /* We can do this with a gen_lowpart if both desired and current modes | |
1348 | are integer, and this is either a constant integer, a register, or a | |
ba2e110c RK |
1349 | non-volatile MEM. Except for the constant case where MODE is no |
1350 | wider than HOST_BITS_PER_WIDE_INT, we must be narrowing the operand. */ | |
bbf6f052 | 1351 | |
ba2e110c RK |
1352 | if ((GET_CODE (x) == CONST_INT |
1353 | && GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT) | |
bbf6f052 | 1354 | || (GET_MODE_CLASS (mode) == MODE_INT |
5ffe63ed | 1355 | && GET_MODE_CLASS (oldmode) == MODE_INT |
bbf6f052 | 1356 | && (GET_CODE (x) == CONST_DOUBLE |
5ffe63ed | 1357 | || (GET_MODE_SIZE (mode) <= GET_MODE_SIZE (oldmode) |
d57c66da JW |
1358 | && ((GET_CODE (x) == MEM && ! MEM_VOLATILE_P (x) |
1359 | && direct_load[(int) mode]) | |
2bf29316 JW |
1360 | || (GET_CODE (x) == REG |
1361 | && TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (mode), | |
1362 | GET_MODE_BITSIZE (GET_MODE (x))))))))) | |
ba2e110c RK |
1363 | { |
1364 | /* ?? If we don't know OLDMODE, we have to assume here that | |
1365 | X does not need sign- or zero-extension. This may not be | |
1366 | the case, but it's the best we can do. */ | |
1367 | if (GET_CODE (x) == CONST_INT && oldmode != VOIDmode | |
1368 | && GET_MODE_SIZE (mode) > GET_MODE_SIZE (oldmode)) | |
1369 | { | |
1370 | HOST_WIDE_INT val = INTVAL (x); | |
1371 | int width = GET_MODE_BITSIZE (oldmode); | |
1372 | ||
1373 | /* We must sign or zero-extend in this case. Start by | |
1374 | zero-extending, then sign extend if we need to. */ | |
1375 | val &= ((HOST_WIDE_INT) 1 << width) - 1; | |
1376 | if (! unsignedp | |
1377 | && (val & ((HOST_WIDE_INT) 1 << (width - 1)))) | |
1378 | val |= (HOST_WIDE_INT) (-1) << width; | |
1379 | ||
1380 | return GEN_INT (val); | |
1381 | } | |
1382 | ||
1383 | return gen_lowpart (mode, x); | |
1384 | } | |
bbf6f052 RK |
1385 | |
1386 | temp = gen_reg_rtx (mode); | |
1387 | convert_move (temp, x, unsignedp); | |
1388 | return temp; | |
1389 | } | |
1390 | \f | |
1391 | /* Generate several move instructions to copy LEN bytes | |
1392 | from block FROM to block TO. (These are MEM rtx's with BLKmode). | |
1393 | The caller must pass FROM and TO | |
1394 | through protect_from_queue before calling. | |
1395 | ALIGN (in bytes) is maximum alignment we can assume. */ | |
1396 | ||
2e245dac | 1397 | void |
bbf6f052 RK |
1398 | move_by_pieces (to, from, len, align) |
1399 | rtx to, from; | |
1400 | int len, align; | |
1401 | { | |
1402 | struct move_by_pieces data; | |
1403 | rtx to_addr = XEXP (to, 0), from_addr = XEXP (from, 0); | |
e87b4f3f | 1404 | int max_size = MOVE_MAX + 1; |
bbf6f052 RK |
1405 | |
1406 | data.offset = 0; | |
1407 | data.to_addr = to_addr; | |
1408 | data.from_addr = from_addr; | |
1409 | data.to = to; | |
1410 | data.from = from; | |
1411 | data.autinc_to | |
1412 | = (GET_CODE (to_addr) == PRE_INC || GET_CODE (to_addr) == PRE_DEC | |
1413 | || GET_CODE (to_addr) == POST_INC || GET_CODE (to_addr) == POST_DEC); | |
1414 | data.autinc_from | |
1415 | = (GET_CODE (from_addr) == PRE_INC || GET_CODE (from_addr) == PRE_DEC | |
1416 | || GET_CODE (from_addr) == POST_INC | |
1417 | || GET_CODE (from_addr) == POST_DEC); | |
1418 | ||
1419 | data.explicit_inc_from = 0; | |
1420 | data.explicit_inc_to = 0; | |
1421 | data.reverse | |
1422 | = (GET_CODE (to_addr) == PRE_DEC || GET_CODE (to_addr) == POST_DEC); | |
1423 | if (data.reverse) data.offset = len; | |
1424 | data.len = len; | |
1425 | ||
e9cf6a97 JW |
1426 | data.to_struct = MEM_IN_STRUCT_P (to); |
1427 | data.from_struct = MEM_IN_STRUCT_P (from); | |
1428 | ||
bbf6f052 RK |
1429 | /* If copying requires more than two move insns, |
1430 | copy addresses to registers (to make displacements shorter) | |
1431 | and use post-increment if available. */ | |
1432 | if (!(data.autinc_from && data.autinc_to) | |
1433 | && move_by_pieces_ninsns (len, align) > 2) | |
1434 | { | |
1435 | #ifdef HAVE_PRE_DECREMENT | |
1436 | if (data.reverse && ! data.autinc_from) | |
1437 | { | |
1438 | data.from_addr = copy_addr_to_reg (plus_constant (from_addr, len)); | |
1439 | data.autinc_from = 1; | |
1440 | data.explicit_inc_from = -1; | |
1441 | } | |
1442 | #endif | |
1443 | #ifdef HAVE_POST_INCREMENT | |
1444 | if (! data.autinc_from) | |
1445 | { | |
1446 | data.from_addr = copy_addr_to_reg (from_addr); | |
1447 | data.autinc_from = 1; | |
1448 | data.explicit_inc_from = 1; | |
1449 | } | |
1450 | #endif | |
1451 | if (!data.autinc_from && CONSTANT_P (from_addr)) | |
1452 | data.from_addr = copy_addr_to_reg (from_addr); | |
1453 | #ifdef HAVE_PRE_DECREMENT | |
1454 | if (data.reverse && ! data.autinc_to) | |
1455 | { | |
1456 | data.to_addr = copy_addr_to_reg (plus_constant (to_addr, len)); | |
1457 | data.autinc_to = 1; | |
1458 | data.explicit_inc_to = -1; | |
1459 | } | |
1460 | #endif | |
1461 | #ifdef HAVE_POST_INCREMENT | |
1462 | if (! data.reverse && ! data.autinc_to) | |
1463 | { | |
1464 | data.to_addr = copy_addr_to_reg (to_addr); | |
1465 | data.autinc_to = 1; | |
1466 | data.explicit_inc_to = 1; | |
1467 | } | |
1468 | #endif | |
1469 | if (!data.autinc_to && CONSTANT_P (to_addr)) | |
1470 | data.to_addr = copy_addr_to_reg (to_addr); | |
1471 | } | |
1472 | ||
c7a7ac46 | 1473 | if (! SLOW_UNALIGNED_ACCESS |
e87b4f3f | 1474 | || align > MOVE_MAX || align >= BIGGEST_ALIGNMENT / BITS_PER_UNIT) |
bbf6f052 | 1475 | align = MOVE_MAX; |
bbf6f052 RK |
1476 | |
1477 | /* First move what we can in the largest integer mode, then go to | |
1478 | successively smaller modes. */ | |
1479 | ||
1480 | while (max_size > 1) | |
1481 | { | |
1482 | enum machine_mode mode = VOIDmode, tmode; | |
1483 | enum insn_code icode; | |
1484 | ||
e7c33f54 RK |
1485 | for (tmode = GET_CLASS_NARROWEST_MODE (MODE_INT); |
1486 | tmode != VOIDmode; tmode = GET_MODE_WIDER_MODE (tmode)) | |
1487 | if (GET_MODE_SIZE (tmode) < max_size) | |
bbf6f052 RK |
1488 | mode = tmode; |
1489 | ||
1490 | if (mode == VOIDmode) | |
1491 | break; | |
1492 | ||
1493 | icode = mov_optab->handlers[(int) mode].insn_code; | |
1494 | if (icode != CODE_FOR_nothing | |
1495 | && align >= MIN (BIGGEST_ALIGNMENT / BITS_PER_UNIT, | |
1496 | GET_MODE_SIZE (mode))) | |
1497 | move_by_pieces_1 (GEN_FCN (icode), mode, &data); | |
1498 | ||
1499 | max_size = GET_MODE_SIZE (mode); | |
1500 | } | |
1501 | ||
1502 | /* The code above should have handled everything. */ | |
2a8e278c | 1503 | if (data.len > 0) |
bbf6f052 RK |
1504 | abort (); |
1505 | } | |
1506 | ||
1507 | /* Return number of insns required to move L bytes by pieces. | |
1508 | ALIGN (in bytes) is maximum alignment we can assume. */ | |
1509 | ||
1510 | static int | |
1511 | move_by_pieces_ninsns (l, align) | |
1512 | unsigned int l; | |
1513 | int align; | |
1514 | { | |
1515 | register int n_insns = 0; | |
e87b4f3f | 1516 | int max_size = MOVE_MAX + 1; |
bbf6f052 | 1517 | |
c7a7ac46 | 1518 | if (! SLOW_UNALIGNED_ACCESS |
e87b4f3f | 1519 | || align > MOVE_MAX || align >= BIGGEST_ALIGNMENT / BITS_PER_UNIT) |
bbf6f052 | 1520 | align = MOVE_MAX; |
bbf6f052 RK |
1521 | |
1522 | while (max_size > 1) | |
1523 | { | |
1524 | enum machine_mode mode = VOIDmode, tmode; | |
1525 | enum insn_code icode; | |
1526 | ||
e7c33f54 RK |
1527 | for (tmode = GET_CLASS_NARROWEST_MODE (MODE_INT); |
1528 | tmode != VOIDmode; tmode = GET_MODE_WIDER_MODE (tmode)) | |
1529 | if (GET_MODE_SIZE (tmode) < max_size) | |
bbf6f052 RK |
1530 | mode = tmode; |
1531 | ||
1532 | if (mode == VOIDmode) | |
1533 | break; | |
1534 | ||
1535 | icode = mov_optab->handlers[(int) mode].insn_code; | |
1536 | if (icode != CODE_FOR_nothing | |
1537 | && align >= MIN (BIGGEST_ALIGNMENT / BITS_PER_UNIT, | |
1538 | GET_MODE_SIZE (mode))) | |
1539 | n_insns += l / GET_MODE_SIZE (mode), l %= GET_MODE_SIZE (mode); | |
1540 | ||
1541 | max_size = GET_MODE_SIZE (mode); | |
1542 | } | |
1543 | ||
1544 | return n_insns; | |
1545 | } | |
1546 | ||
1547 | /* Subroutine of move_by_pieces. Move as many bytes as appropriate | |
1548 | with move instructions for mode MODE. GENFUN is the gen_... function | |
1549 | to make a move insn for that mode. DATA has all the other info. */ | |
1550 | ||
1551 | static void | |
1552 | move_by_pieces_1 (genfun, mode, data) | |
eae4b970 | 1553 | rtx (*genfun) PROTO ((rtx, ...)); |
bbf6f052 RK |
1554 | enum machine_mode mode; |
1555 | struct move_by_pieces *data; | |
1556 | { | |
1557 | register int size = GET_MODE_SIZE (mode); | |
1558 | register rtx to1, from1; | |
1559 | ||
1560 | while (data->len >= size) | |
1561 | { | |
1562 | if (data->reverse) data->offset -= size; | |
1563 | ||
1564 | to1 = (data->autinc_to | |
38a448ca | 1565 | ? gen_rtx_MEM (mode, data->to_addr) |
effbcc6a RK |
1566 | : copy_rtx (change_address (data->to, mode, |
1567 | plus_constant (data->to_addr, | |
1568 | data->offset)))); | |
e9cf6a97 | 1569 | MEM_IN_STRUCT_P (to1) = data->to_struct; |
effbcc6a | 1570 | |
db3cf6fb MS |
1571 | from1 |
1572 | = (data->autinc_from | |
38a448ca | 1573 | ? gen_rtx_MEM (mode, data->from_addr) |
db3cf6fb MS |
1574 | : copy_rtx (change_address (data->from, mode, |
1575 | plus_constant (data->from_addr, | |
1576 | data->offset)))); | |
e9cf6a97 | 1577 | MEM_IN_STRUCT_P (from1) = data->from_struct; |
bbf6f052 RK |
1578 | |
1579 | #ifdef HAVE_PRE_DECREMENT | |
1580 | if (data->explicit_inc_to < 0) | |
906c4e36 | 1581 | emit_insn (gen_add2_insn (data->to_addr, GEN_INT (-size))); |
bbf6f052 | 1582 | if (data->explicit_inc_from < 0) |
906c4e36 | 1583 | emit_insn (gen_add2_insn (data->from_addr, GEN_INT (-size))); |
bbf6f052 RK |
1584 | #endif |
1585 | ||
1586 | emit_insn ((*genfun) (to1, from1)); | |
1587 | #ifdef HAVE_POST_INCREMENT | |
1588 | if (data->explicit_inc_to > 0) | |
906c4e36 | 1589 | emit_insn (gen_add2_insn (data->to_addr, GEN_INT (size))); |
bbf6f052 | 1590 | if (data->explicit_inc_from > 0) |
906c4e36 | 1591 | emit_insn (gen_add2_insn (data->from_addr, GEN_INT (size))); |
bbf6f052 RK |
1592 | #endif |
1593 | ||
1594 | if (! data->reverse) data->offset += size; | |
1595 | ||
1596 | data->len -= size; | |
1597 | } | |
1598 | } | |
1599 | \f | |
1600 | /* Emit code to move a block Y to a block X. | |
1601 | This may be done with string-move instructions, | |
1602 | with multiple scalar move instructions, or with a library call. | |
1603 | ||
1604 | Both X and Y must be MEM rtx's (perhaps inside VOLATILE) | |
1605 | with mode BLKmode. | |
1606 | SIZE is an rtx that says how long they are. | |
1607 | ALIGN is the maximum alignment we can assume they have, | |
e9a25f70 | 1608 | measured in bytes. |
bbf6f052 | 1609 | |
e9a25f70 JL |
1610 | Return the address of the new block, if memcpy is called and returns it, |
1611 | 0 otherwise. */ | |
1612 | ||
1613 | rtx | |
bbf6f052 RK |
1614 | emit_block_move (x, y, size, align) |
1615 | rtx x, y; | |
1616 | rtx size; | |
1617 | int align; | |
1618 | { | |
e9a25f70 | 1619 | rtx retval = 0; |
52cf7115 JL |
1620 | #ifdef TARGET_MEM_FUNCTIONS |
1621 | static tree fn; | |
1622 | tree call_expr, arg_list; | |
1623 | #endif | |
e9a25f70 | 1624 | |
bbf6f052 RK |
1625 | if (GET_MODE (x) != BLKmode) |
1626 | abort (); | |
1627 | ||
1628 | if (GET_MODE (y) != BLKmode) | |
1629 | abort (); | |
1630 | ||
1631 | x = protect_from_queue (x, 1); | |
1632 | y = protect_from_queue (y, 0); | |
5d901c31 | 1633 | size = protect_from_queue (size, 0); |
bbf6f052 RK |
1634 | |
1635 | if (GET_CODE (x) != MEM) | |
1636 | abort (); | |
1637 | if (GET_CODE (y) != MEM) | |
1638 | abort (); | |
1639 | if (size == 0) | |
1640 | abort (); | |
1641 | ||
1642 | if (GET_CODE (size) == CONST_INT | |
906c4e36 | 1643 | && (move_by_pieces_ninsns (INTVAL (size), align) < MOVE_RATIO)) |
bbf6f052 RK |
1644 | move_by_pieces (x, y, INTVAL (size), align); |
1645 | else | |
1646 | { | |
1647 | /* Try the most limited insn first, because there's no point | |
1648 | including more than one in the machine description unless | |
1649 | the more limited one has some advantage. */ | |
266007a7 | 1650 | |
0bba3f6f | 1651 | rtx opalign = GEN_INT (align); |
266007a7 RK |
1652 | enum machine_mode mode; |
1653 | ||
1654 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); mode != VOIDmode; | |
1655 | mode = GET_MODE_WIDER_MODE (mode)) | |
bbf6f052 | 1656 | { |
266007a7 | 1657 | enum insn_code code = movstr_optab[(int) mode]; |
266007a7 RK |
1658 | |
1659 | if (code != CODE_FOR_nothing | |
803090c4 RK |
1660 | /* We don't need MODE to be narrower than BITS_PER_HOST_WIDE_INT |
1661 | here because if SIZE is less than the mode mask, as it is | |
8008b228 | 1662 | returned by the macro, it will definitely be less than the |
803090c4 | 1663 | actual mode mask. */ |
8ca00751 RK |
1664 | && ((GET_CODE (size) == CONST_INT |
1665 | && ((unsigned HOST_WIDE_INT) INTVAL (size) | |
e5e809f4 | 1666 | <= (GET_MODE_MASK (mode) >> 1))) |
8ca00751 | 1667 | || GET_MODE_BITSIZE (mode) >= BITS_PER_WORD) |
0bba3f6f RK |
1668 | && (insn_operand_predicate[(int) code][0] == 0 |
1669 | || (*insn_operand_predicate[(int) code][0]) (x, BLKmode)) | |
1670 | && (insn_operand_predicate[(int) code][1] == 0 | |
1671 | || (*insn_operand_predicate[(int) code][1]) (y, BLKmode)) | |
1672 | && (insn_operand_predicate[(int) code][3] == 0 | |
1673 | || (*insn_operand_predicate[(int) code][3]) (opalign, | |
1674 | VOIDmode))) | |
bbf6f052 | 1675 | { |
1ba1e2a8 | 1676 | rtx op2; |
266007a7 RK |
1677 | rtx last = get_last_insn (); |
1678 | rtx pat; | |
1679 | ||
1ba1e2a8 | 1680 | op2 = convert_to_mode (mode, size, 1); |
0bba3f6f RK |
1681 | if (insn_operand_predicate[(int) code][2] != 0 |
1682 | && ! (*insn_operand_predicate[(int) code][2]) (op2, mode)) | |
266007a7 RK |
1683 | op2 = copy_to_mode_reg (mode, op2); |
1684 | ||
1685 | pat = GEN_FCN ((int) code) (x, y, op2, opalign); | |
1686 | if (pat) | |
1687 | { | |
1688 | emit_insn (pat); | |
e9a25f70 | 1689 | return 0; |
266007a7 RK |
1690 | } |
1691 | else | |
1692 | delete_insns_since (last); | |
bbf6f052 RK |
1693 | } |
1694 | } | |
bbf6f052 RK |
1695 | |
1696 | #ifdef TARGET_MEM_FUNCTIONS | |
52cf7115 JL |
1697 | /* It is incorrect to use the libcall calling conventions to call |
1698 | memcpy in this context. | |
1699 | ||
1700 | This could be a user call to memcpy and the user may wish to | |
1701 | examine the return value from memcpy. | |
1702 | ||
1703 | For targets where libcalls and normal calls have different conventions | |
1704 | for returning pointers, we could end up generating incorrect code. | |
1705 | ||
1706 | So instead of using a libcall sequence we build up a suitable | |
1707 | CALL_EXPR and expand the call in the normal fashion. */ | |
1708 | if (fn == NULL_TREE) | |
1709 | { | |
1710 | tree fntype; | |
1711 | ||
1712 | /* This was copied from except.c, I don't know if all this is | |
1713 | necessary in this context or not. */ | |
1714 | fn = get_identifier ("memcpy"); | |
1715 | push_obstacks_nochange (); | |
1716 | end_temporary_allocation (); | |
1717 | fntype = build_pointer_type (void_type_node); | |
1718 | fntype = build_function_type (fntype, NULL_TREE); | |
1719 | fn = build_decl (FUNCTION_DECL, fn, fntype); | |
1720 | DECL_EXTERNAL (fn) = 1; | |
1721 | TREE_PUBLIC (fn) = 1; | |
1722 | DECL_ARTIFICIAL (fn) = 1; | |
1723 | make_decl_rtl (fn, NULL_PTR, 1); | |
1724 | assemble_external (fn); | |
1725 | pop_obstacks (); | |
1726 | } | |
1727 | ||
1728 | /* We need to make an argument list for the function call. | |
1729 | ||
1730 | memcpy has three arguments, the first two are void * addresses and | |
1731 | the last is a size_t byte count for the copy. */ | |
1732 | arg_list | |
1733 | = build_tree_list (NULL_TREE, | |
1734 | make_tree (build_pointer_type (void_type_node), | |
1735 | XEXP (x, 0))); | |
1736 | TREE_CHAIN (arg_list) | |
1737 | = build_tree_list (NULL_TREE, | |
1738 | make_tree (build_pointer_type (void_type_node), | |
1739 | XEXP (y, 0))); | |
1740 | TREE_CHAIN (TREE_CHAIN (arg_list)) | |
1741 | = build_tree_list (NULL_TREE, make_tree (sizetype, size)); | |
1742 | TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (arg_list))) = NULL_TREE; | |
1743 | ||
1744 | /* Now we have to build up the CALL_EXPR itself. */ | |
1745 | call_expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn); | |
1746 | call_expr = build (CALL_EXPR, TREE_TYPE (TREE_TYPE (fn)), | |
1747 | call_expr, arg_list, NULL_TREE); | |
1748 | TREE_SIDE_EFFECTS (call_expr) = 1; | |
1749 | ||
1750 | retval = expand_expr (call_expr, NULL_RTX, VOIDmode, 0); | |
bbf6f052 | 1751 | #else |
d562e42e | 1752 | emit_library_call (bcopy_libfunc, 0, |
bbf6f052 RK |
1753 | VOIDmode, 3, XEXP (y, 0), Pmode, |
1754 | XEXP (x, 0), Pmode, | |
3b6f75e2 JW |
1755 | convert_to_mode (TYPE_MODE (integer_type_node), size, |
1756 | TREE_UNSIGNED (integer_type_node)), | |
1757 | TYPE_MODE (integer_type_node)); | |
bbf6f052 RK |
1758 | #endif |
1759 | } | |
e9a25f70 JL |
1760 | |
1761 | return retval; | |
bbf6f052 RK |
1762 | } |
1763 | \f | |
1764 | /* Copy all or part of a value X into registers starting at REGNO. | |
1765 | The number of registers to be filled is NREGS. */ | |
1766 | ||
1767 | void | |
1768 | move_block_to_reg (regno, x, nregs, mode) | |
1769 | int regno; | |
1770 | rtx x; | |
1771 | int nregs; | |
1772 | enum machine_mode mode; | |
1773 | { | |
1774 | int i; | |
381127e8 RL |
1775 | #ifdef HAVE_load_multiple |
1776 | rtx pat; | |
1777 | rtx last; | |
1778 | #endif | |
bbf6f052 | 1779 | |
72bb9717 RK |
1780 | if (nregs == 0) |
1781 | return; | |
1782 | ||
bbf6f052 RK |
1783 | if (CONSTANT_P (x) && ! LEGITIMATE_CONSTANT_P (x)) |
1784 | x = validize_mem (force_const_mem (mode, x)); | |
1785 | ||
1786 | /* See if the machine can do this with a load multiple insn. */ | |
1787 | #ifdef HAVE_load_multiple | |
c3a02afe | 1788 | if (HAVE_load_multiple) |
bbf6f052 | 1789 | { |
c3a02afe | 1790 | last = get_last_insn (); |
38a448ca | 1791 | pat = gen_load_multiple (gen_rtx_REG (word_mode, regno), x, |
c3a02afe RK |
1792 | GEN_INT (nregs)); |
1793 | if (pat) | |
1794 | { | |
1795 | emit_insn (pat); | |
1796 | return; | |
1797 | } | |
1798 | else | |
1799 | delete_insns_since (last); | |
bbf6f052 | 1800 | } |
bbf6f052 RK |
1801 | #endif |
1802 | ||
1803 | for (i = 0; i < nregs; i++) | |
38a448ca | 1804 | emit_move_insn (gen_rtx_REG (word_mode, regno + i), |
bbf6f052 RK |
1805 | operand_subword_force (x, i, mode)); |
1806 | } | |
1807 | ||
1808 | /* Copy all or part of a BLKmode value X out of registers starting at REGNO. | |
0040593d JW |
1809 | The number of registers to be filled is NREGS. SIZE indicates the number |
1810 | of bytes in the object X. */ | |
1811 | ||
bbf6f052 RK |
1812 | |
1813 | void | |
0040593d | 1814 | move_block_from_reg (regno, x, nregs, size) |
bbf6f052 RK |
1815 | int regno; |
1816 | rtx x; | |
1817 | int nregs; | |
0040593d | 1818 | int size; |
bbf6f052 RK |
1819 | { |
1820 | int i; | |
381127e8 RL |
1821 | #ifdef HAVE_store_multiple |
1822 | rtx pat; | |
1823 | rtx last; | |
1824 | #endif | |
58a32c5c | 1825 | enum machine_mode mode; |
bbf6f052 | 1826 | |
58a32c5c DE |
1827 | /* If SIZE is that of a mode no bigger than a word, just use that |
1828 | mode's store operation. */ | |
1829 | if (size <= UNITS_PER_WORD | |
1830 | && (mode = mode_for_size (size * BITS_PER_UNIT, MODE_INT, 0)) != BLKmode) | |
1831 | { | |
1832 | emit_move_insn (change_address (x, mode, NULL), | |
38a448ca | 1833 | gen_rtx_REG (mode, regno)); |
58a32c5c DE |
1834 | return; |
1835 | } | |
1836 | ||
0040593d | 1837 | /* Blocks smaller than a word on a BYTES_BIG_ENDIAN machine must be aligned |
58a32c5c DE |
1838 | to the left before storing to memory. Note that the previous test |
1839 | doesn't handle all cases (e.g. SIZE == 3). */ | |
0040593d JW |
1840 | if (size < UNITS_PER_WORD && BYTES_BIG_ENDIAN) |
1841 | { | |
1842 | rtx tem = operand_subword (x, 0, 1, BLKmode); | |
1843 | rtx shift; | |
1844 | ||
1845 | if (tem == 0) | |
1846 | abort (); | |
1847 | ||
1848 | shift = expand_shift (LSHIFT_EXPR, word_mode, | |
38a448ca | 1849 | gen_rtx_REG (word_mode, regno), |
0040593d JW |
1850 | build_int_2 ((UNITS_PER_WORD - size) |
1851 | * BITS_PER_UNIT, 0), NULL_RTX, 0); | |
1852 | emit_move_insn (tem, shift); | |
1853 | return; | |
1854 | } | |
1855 | ||
bbf6f052 RK |
1856 | /* See if the machine can do this with a store multiple insn. */ |
1857 | #ifdef HAVE_store_multiple | |
c3a02afe | 1858 | if (HAVE_store_multiple) |
bbf6f052 | 1859 | { |
c3a02afe | 1860 | last = get_last_insn (); |
38a448ca | 1861 | pat = gen_store_multiple (x, gen_rtx_REG (word_mode, regno), |
c3a02afe RK |
1862 | GEN_INT (nregs)); |
1863 | if (pat) | |
1864 | { | |
1865 | emit_insn (pat); | |
1866 | return; | |
1867 | } | |
1868 | else | |
1869 | delete_insns_since (last); | |
bbf6f052 | 1870 | } |
bbf6f052 RK |
1871 | #endif |
1872 | ||
1873 | for (i = 0; i < nregs; i++) | |
1874 | { | |
1875 | rtx tem = operand_subword (x, i, 1, BLKmode); | |
1876 | ||
1877 | if (tem == 0) | |
1878 | abort (); | |
1879 | ||
38a448ca | 1880 | emit_move_insn (tem, gen_rtx_REG (word_mode, regno + i)); |
bbf6f052 RK |
1881 | } |
1882 | } | |
1883 | ||
aac5cc16 RH |
1884 | /* Emit code to move a block SRC to a block DST, where DST is non-consecutive |
1885 | registers represented by a PARALLEL. SSIZE represents the total size of | |
1886 | block SRC in bytes, or -1 if not known. ALIGN is the known alignment of | |
1887 | SRC in bits. */ | |
1888 | /* ??? If SSIZE % UNITS_PER_WORD != 0, we make the blatent assumption that | |
1889 | the balance will be in what would be the low-order memory addresses, i.e. | |
1890 | left justified for big endian, right justified for little endian. This | |
1891 | happens to be true for the targets currently using this support. If this | |
1892 | ever changes, a new target macro along the lines of FUNCTION_ARG_PADDING | |
1893 | would be needed. */ | |
fffa9c1d JW |
1894 | |
1895 | void | |
aac5cc16 RH |
1896 | emit_group_load (dst, orig_src, ssize, align) |
1897 | rtx dst, orig_src; | |
1898 | int align, ssize; | |
fffa9c1d | 1899 | { |
aac5cc16 RH |
1900 | rtx *tmps, src; |
1901 | int start, i; | |
fffa9c1d | 1902 | |
aac5cc16 | 1903 | if (GET_CODE (dst) != PARALLEL) |
fffa9c1d JW |
1904 | abort (); |
1905 | ||
1906 | /* Check for a NULL entry, used to indicate that the parameter goes | |
1907 | both on the stack and in registers. */ | |
aac5cc16 RH |
1908 | if (XEXP (XVECEXP (dst, 0, 0), 0)) |
1909 | start = 0; | |
fffa9c1d | 1910 | else |
aac5cc16 RH |
1911 | start = 1; |
1912 | ||
1913 | tmps = (rtx *) alloca (sizeof(rtx) * XVECLEN (dst, 0)); | |
1914 | ||
1915 | /* If we won't be loading directly from memory, protect the real source | |
1916 | from strange tricks we might play. */ | |
1917 | src = orig_src; | |
1918 | if (GET_CODE (src) != MEM) | |
1919 | { | |
1920 | src = gen_reg_rtx (GET_MODE (orig_src)); | |
1921 | emit_move_insn (src, orig_src); | |
1922 | } | |
1923 | ||
1924 | /* Process the pieces. */ | |
1925 | for (i = start; i < XVECLEN (dst, 0); i++) | |
1926 | { | |
1927 | enum machine_mode mode = GET_MODE (XEXP (XVECEXP (dst, 0, i), 0)); | |
1928 | int bytepos = INTVAL (XEXP (XVECEXP (dst, 0, i), 1)); | |
1929 | int bytelen = GET_MODE_SIZE (mode); | |
1930 | int shift = 0; | |
1931 | ||
1932 | /* Handle trailing fragments that run over the size of the struct. */ | |
1933 | if (ssize >= 0 && bytepos + bytelen > ssize) | |
1934 | { | |
1935 | shift = (bytelen - (ssize - bytepos)) * BITS_PER_UNIT; | |
1936 | bytelen = ssize - bytepos; | |
1937 | if (bytelen <= 0) | |
1938 | abort(); | |
1939 | } | |
1940 | ||
1941 | /* Optimize the access just a bit. */ | |
1942 | if (GET_CODE (src) == MEM | |
1943 | && align*BITS_PER_UNIT >= GET_MODE_ALIGNMENT (mode) | |
1944 | && bytepos*BITS_PER_UNIT % GET_MODE_ALIGNMENT (mode) == 0 | |
1945 | && bytelen == GET_MODE_SIZE (mode)) | |
1946 | { | |
1947 | tmps[i] = gen_reg_rtx (mode); | |
1948 | emit_move_insn (tmps[i], | |
1949 | change_address (src, mode, | |
1950 | plus_constant (XEXP (src, 0), | |
1951 | bytepos))); | |
fffa9c1d JW |
1952 | } |
1953 | else | |
aac5cc16 RH |
1954 | { |
1955 | tmps[i] = extract_bit_field (src, bytelen*BITS_PER_UNIT, | |
1956 | bytepos*BITS_PER_UNIT, 1, NULL_RTX, | |
1957 | mode, mode, align, ssize); | |
1958 | } | |
fffa9c1d | 1959 | |
aac5cc16 RH |
1960 | if (BYTES_BIG_ENDIAN && shift) |
1961 | { | |
1962 | expand_binop (mode, ashl_optab, tmps[i], GEN_INT (shift), | |
1963 | tmps[i], 0, OPTAB_WIDEN); | |
1964 | } | |
fffa9c1d | 1965 | } |
aac5cc16 RH |
1966 | emit_queue(); |
1967 | ||
1968 | /* Copy the extracted pieces into the proper (probable) hard regs. */ | |
1969 | for (i = start; i < XVECLEN (dst, 0); i++) | |
1970 | emit_move_insn (XEXP (XVECEXP (dst, 0, i), 0), tmps[i]); | |
fffa9c1d JW |
1971 | } |
1972 | ||
aac5cc16 RH |
1973 | /* Emit code to move a block SRC to a block DST, where SRC is non-consecutive |
1974 | registers represented by a PARALLEL. SSIZE represents the total size of | |
1975 | block DST, or -1 if not known. ALIGN is the known alignment of DST. */ | |
fffa9c1d JW |
1976 | |
1977 | void | |
aac5cc16 RH |
1978 | emit_group_store (orig_dst, src, ssize, align) |
1979 | rtx orig_dst, src; | |
1980 | int ssize, align; | |
fffa9c1d | 1981 | { |
aac5cc16 RH |
1982 | rtx *tmps, dst; |
1983 | int start, i; | |
fffa9c1d | 1984 | |
aac5cc16 | 1985 | if (GET_CODE (src) != PARALLEL) |
fffa9c1d JW |
1986 | abort (); |
1987 | ||
1988 | /* Check for a NULL entry, used to indicate that the parameter goes | |
1989 | both on the stack and in registers. */ | |
aac5cc16 RH |
1990 | if (XEXP (XVECEXP (src, 0, 0), 0)) |
1991 | start = 0; | |
fffa9c1d | 1992 | else |
aac5cc16 RH |
1993 | start = 1; |
1994 | ||
1995 | tmps = (rtx *) alloca (sizeof(rtx) * XVECLEN (src, 0)); | |
fffa9c1d | 1996 | |
aac5cc16 RH |
1997 | /* Copy the (probable) hard regs into pseudos. */ |
1998 | for (i = start; i < XVECLEN (src, 0); i++) | |
fffa9c1d | 1999 | { |
aac5cc16 RH |
2000 | rtx reg = XEXP (XVECEXP (src, 0, i), 0); |
2001 | tmps[i] = gen_reg_rtx (GET_MODE (reg)); | |
2002 | emit_move_insn (tmps[i], reg); | |
2003 | } | |
2004 | emit_queue(); | |
fffa9c1d | 2005 | |
aac5cc16 RH |
2006 | /* If we won't be storing directly into memory, protect the real destination |
2007 | from strange tricks we might play. */ | |
2008 | dst = orig_dst; | |
2009 | if (GET_CODE (dst) != MEM) | |
2010 | { | |
2011 | dst = gen_reg_rtx (GET_MODE (orig_dst)); | |
2012 | /* Make life a bit easier for combine. */ | |
2013 | emit_move_insn (dst, const0_rtx); | |
2014 | } | |
2015 | else if (! MEM_IN_STRUCT_P (dst)) | |
2016 | { | |
2017 | /* store_bit_field requires that memory operations have | |
2018 | mem_in_struct_p set; we might not. */ | |
fffa9c1d | 2019 | |
aac5cc16 RH |
2020 | dst = copy_rtx (orig_dst); |
2021 | MEM_IN_STRUCT_P (dst) = 1; | |
2022 | } | |
2023 | ||
2024 | /* Process the pieces. */ | |
2025 | for (i = start; i < XVECLEN (src, 0); i++) | |
2026 | { | |
2027 | int bytepos = INTVAL (XEXP (XVECEXP (src, 0, i), 1)); | |
2028 | enum machine_mode mode = GET_MODE (tmps[i]); | |
2029 | int bytelen = GET_MODE_SIZE (mode); | |
2030 | ||
2031 | /* Handle trailing fragments that run over the size of the struct. */ | |
2032 | if (ssize >= 0 && bytepos + bytelen > ssize) | |
71bc0330 | 2033 | { |
aac5cc16 RH |
2034 | if (BYTES_BIG_ENDIAN) |
2035 | { | |
2036 | int shift = (bytelen - (ssize - bytepos)) * BITS_PER_UNIT; | |
2037 | expand_binop (mode, ashr_optab, tmps[i], GEN_INT (shift), | |
2038 | tmps[i], 0, OPTAB_WIDEN); | |
2039 | } | |
2040 | bytelen = ssize - bytepos; | |
71bc0330 | 2041 | } |
fffa9c1d | 2042 | |
aac5cc16 RH |
2043 | /* Optimize the access just a bit. */ |
2044 | if (GET_CODE (dst) == MEM | |
2045 | && align*BITS_PER_UNIT >= GET_MODE_ALIGNMENT (mode) | |
2046 | && bytepos*BITS_PER_UNIT % GET_MODE_ALIGNMENT (mode) == 0 | |
2047 | && bytelen == GET_MODE_SIZE (mode)) | |
2048 | { | |
2049 | emit_move_insn (change_address (dst, mode, | |
2050 | plus_constant (XEXP (dst, 0), | |
2051 | bytepos)), | |
2052 | tmps[i]); | |
2053 | } | |
2054 | else | |
2055 | { | |
2056 | store_bit_field (dst, bytelen*BITS_PER_UNIT, bytepos*BITS_PER_UNIT, | |
2057 | mode, tmps[i], align, ssize); | |
2058 | } | |
fffa9c1d | 2059 | } |
aac5cc16 RH |
2060 | emit_queue(); |
2061 | ||
2062 | /* Copy from the pseudo into the (probable) hard reg. */ | |
2063 | if (GET_CODE (dst) == REG) | |
2064 | emit_move_insn (orig_dst, dst); | |
fffa9c1d JW |
2065 | } |
2066 | ||
94b25f81 RK |
2067 | /* Add a USE expression for REG to the (possibly empty) list pointed |
2068 | to by CALL_FUSAGE. REG must denote a hard register. */ | |
bbf6f052 RK |
2069 | |
2070 | void | |
b3f8cf4a RK |
2071 | use_reg (call_fusage, reg) |
2072 | rtx *call_fusage, reg; | |
2073 | { | |
0304dfbb DE |
2074 | if (GET_CODE (reg) != REG |
2075 | || REGNO (reg) >= FIRST_PSEUDO_REGISTER) | |
b3f8cf4a RK |
2076 | abort(); |
2077 | ||
2078 | *call_fusage | |
38a448ca RH |
2079 | = gen_rtx_EXPR_LIST (VOIDmode, |
2080 | gen_rtx_USE (VOIDmode, reg), *call_fusage); | |
b3f8cf4a RK |
2081 | } |
2082 | ||
94b25f81 RK |
2083 | /* Add USE expressions to *CALL_FUSAGE for each of NREGS consecutive regs, |
2084 | starting at REGNO. All of these registers must be hard registers. */ | |
b3f8cf4a RK |
2085 | |
2086 | void | |
0304dfbb DE |
2087 | use_regs (call_fusage, regno, nregs) |
2088 | rtx *call_fusage; | |
bbf6f052 RK |
2089 | int regno; |
2090 | int nregs; | |
2091 | { | |
0304dfbb | 2092 | int i; |
bbf6f052 | 2093 | |
0304dfbb DE |
2094 | if (regno + nregs > FIRST_PSEUDO_REGISTER) |
2095 | abort (); | |
2096 | ||
2097 | for (i = 0; i < nregs; i++) | |
38a448ca | 2098 | use_reg (call_fusage, gen_rtx_REG (reg_raw_mode[regno + i], regno + i)); |
bbf6f052 | 2099 | } |
fffa9c1d JW |
2100 | |
2101 | /* Add USE expressions to *CALL_FUSAGE for each REG contained in the | |
2102 | PARALLEL REGS. This is for calls that pass values in multiple | |
2103 | non-contiguous locations. The Irix 6 ABI has examples of this. */ | |
2104 | ||
2105 | void | |
2106 | use_group_regs (call_fusage, regs) | |
2107 | rtx *call_fusage; | |
2108 | rtx regs; | |
2109 | { | |
2110 | int i; | |
2111 | ||
6bd35f86 DE |
2112 | for (i = 0; i < XVECLEN (regs, 0); i++) |
2113 | { | |
2114 | rtx reg = XEXP (XVECEXP (regs, 0, i), 0); | |
fffa9c1d | 2115 | |
6bd35f86 DE |
2116 | /* A NULL entry means the parameter goes both on the stack and in |
2117 | registers. This can also be a MEM for targets that pass values | |
2118 | partially on the stack and partially in registers. */ | |
e9a25f70 | 2119 | if (reg != 0 && GET_CODE (reg) == REG) |
6bd35f86 DE |
2120 | use_reg (call_fusage, reg); |
2121 | } | |
fffa9c1d | 2122 | } |
bbf6f052 | 2123 | \f |
9de08200 RK |
2124 | /* Generate several move instructions to clear LEN bytes of block TO. |
2125 | (A MEM rtx with BLKmode). The caller must pass TO through | |
2126 | protect_from_queue before calling. ALIGN (in bytes) is maximum alignment | |
2127 | we can assume. */ | |
2128 | ||
2129 | static void | |
2130 | clear_by_pieces (to, len, align) | |
2131 | rtx to; | |
2132 | int len, align; | |
2133 | { | |
2134 | struct clear_by_pieces data; | |
2135 | rtx to_addr = XEXP (to, 0); | |
2136 | int max_size = MOVE_MAX + 1; | |
2137 | ||
2138 | data.offset = 0; | |
2139 | data.to_addr = to_addr; | |
2140 | data.to = to; | |
2141 | data.autinc_to | |
2142 | = (GET_CODE (to_addr) == PRE_INC || GET_CODE (to_addr) == PRE_DEC | |
2143 | || GET_CODE (to_addr) == POST_INC || GET_CODE (to_addr) == POST_DEC); | |
2144 | ||
2145 | data.explicit_inc_to = 0; | |
2146 | data.reverse | |
2147 | = (GET_CODE (to_addr) == PRE_DEC || GET_CODE (to_addr) == POST_DEC); | |
2148 | if (data.reverse) data.offset = len; | |
2149 | data.len = len; | |
2150 | ||
2151 | data.to_struct = MEM_IN_STRUCT_P (to); | |
2152 | ||
2153 | /* If copying requires more than two move insns, | |
2154 | copy addresses to registers (to make displacements shorter) | |
2155 | and use post-increment if available. */ | |
2156 | if (!data.autinc_to | |
2157 | && move_by_pieces_ninsns (len, align) > 2) | |
2158 | { | |
2159 | #ifdef HAVE_PRE_DECREMENT | |
2160 | if (data.reverse && ! data.autinc_to) | |
2161 | { | |
2162 | data.to_addr = copy_addr_to_reg (plus_constant (to_addr, len)); | |
2163 | data.autinc_to = 1; | |
2164 | data.explicit_inc_to = -1; | |
2165 | } | |
2166 | #endif | |
2167 | #ifdef HAVE_POST_INCREMENT | |
2168 | if (! data.reverse && ! data.autinc_to) | |
2169 | { | |
2170 | data.to_addr = copy_addr_to_reg (to_addr); | |
2171 | data.autinc_to = 1; | |
2172 | data.explicit_inc_to = 1; | |
2173 | } | |
2174 | #endif | |
2175 | if (!data.autinc_to && CONSTANT_P (to_addr)) | |
2176 | data.to_addr = copy_addr_to_reg (to_addr); | |
2177 | } | |
2178 | ||
2179 | if (! SLOW_UNALIGNED_ACCESS | |
2180 | || align > MOVE_MAX || align >= BIGGEST_ALIGNMENT / BITS_PER_UNIT) | |
2181 | align = MOVE_MAX; | |
2182 | ||
2183 | /* First move what we can in the largest integer mode, then go to | |
2184 | successively smaller modes. */ | |
2185 | ||
2186 | while (max_size > 1) | |
2187 | { | |
2188 | enum machine_mode mode = VOIDmode, tmode; | |
2189 | enum insn_code icode; | |
2190 | ||
2191 | for (tmode = GET_CLASS_NARROWEST_MODE (MODE_INT); | |
2192 | tmode != VOIDmode; tmode = GET_MODE_WIDER_MODE (tmode)) | |
2193 | if (GET_MODE_SIZE (tmode) < max_size) | |
2194 | mode = tmode; | |
2195 | ||
2196 | if (mode == VOIDmode) | |
2197 | break; | |
2198 | ||
2199 | icode = mov_optab->handlers[(int) mode].insn_code; | |
2200 | if (icode != CODE_FOR_nothing | |
2201 | && align >= MIN (BIGGEST_ALIGNMENT / BITS_PER_UNIT, | |
2202 | GET_MODE_SIZE (mode))) | |
2203 | clear_by_pieces_1 (GEN_FCN (icode), mode, &data); | |
2204 | ||
2205 | max_size = GET_MODE_SIZE (mode); | |
2206 | } | |
2207 | ||
2208 | /* The code above should have handled everything. */ | |
2209 | if (data.len != 0) | |
2210 | abort (); | |
2211 | } | |
2212 | ||
2213 | /* Subroutine of clear_by_pieces. Clear as many bytes as appropriate | |
2214 | with move instructions for mode MODE. GENFUN is the gen_... function | |
2215 | to make a move insn for that mode. DATA has all the other info. */ | |
2216 | ||
2217 | static void | |
2218 | clear_by_pieces_1 (genfun, mode, data) | |
eae4b970 | 2219 | rtx (*genfun) PROTO ((rtx, ...)); |
9de08200 RK |
2220 | enum machine_mode mode; |
2221 | struct clear_by_pieces *data; | |
2222 | { | |
2223 | register int size = GET_MODE_SIZE (mode); | |
2224 | register rtx to1; | |
2225 | ||
2226 | while (data->len >= size) | |
2227 | { | |
2228 | if (data->reverse) data->offset -= size; | |
2229 | ||
2230 | to1 = (data->autinc_to | |
38a448ca | 2231 | ? gen_rtx_MEM (mode, data->to_addr) |
effbcc6a RK |
2232 | : copy_rtx (change_address (data->to, mode, |
2233 | plus_constant (data->to_addr, | |
2234 | data->offset)))); | |
9de08200 RK |
2235 | MEM_IN_STRUCT_P (to1) = data->to_struct; |
2236 | ||
2237 | #ifdef HAVE_PRE_DECREMENT | |
2238 | if (data->explicit_inc_to < 0) | |
2239 | emit_insn (gen_add2_insn (data->to_addr, GEN_INT (-size))); | |
2240 | #endif | |
2241 | ||
2242 | emit_insn ((*genfun) (to1, const0_rtx)); | |
2243 | #ifdef HAVE_POST_INCREMENT | |
2244 | if (data->explicit_inc_to > 0) | |
2245 | emit_insn (gen_add2_insn (data->to_addr, GEN_INT (size))); | |
2246 | #endif | |
2247 | ||
2248 | if (! data->reverse) data->offset += size; | |
2249 | ||
2250 | data->len -= size; | |
2251 | } | |
2252 | } | |
2253 | \f | |
bbf6f052 | 2254 | /* Write zeros through the storage of OBJECT. |
9de08200 | 2255 | If OBJECT has BLKmode, SIZE is its length in bytes and ALIGN is |
e9a25f70 | 2256 | the maximum alignment we can is has, measured in bytes. |
bbf6f052 | 2257 | |
e9a25f70 JL |
2258 | If we call a function that returns the length of the block, return it. */ |
2259 | ||
2260 | rtx | |
9de08200 | 2261 | clear_storage (object, size, align) |
bbf6f052 | 2262 | rtx object; |
4c08eef0 | 2263 | rtx size; |
9de08200 | 2264 | int align; |
bbf6f052 | 2265 | { |
52cf7115 JL |
2266 | #ifdef TARGET_MEM_FUNCTIONS |
2267 | static tree fn; | |
2268 | tree call_expr, arg_list; | |
2269 | #endif | |
e9a25f70 JL |
2270 | rtx retval = 0; |
2271 | ||
bbf6f052 RK |
2272 | if (GET_MODE (object) == BLKmode) |
2273 | { | |
9de08200 RK |
2274 | object = protect_from_queue (object, 1); |
2275 | size = protect_from_queue (size, 0); | |
2276 | ||
2277 | if (GET_CODE (size) == CONST_INT | |
2278 | && (move_by_pieces_ninsns (INTVAL (size), align) < MOVE_RATIO)) | |
2279 | clear_by_pieces (object, INTVAL (size), align); | |
2280 | ||
2281 | else | |
2282 | { | |
2283 | /* Try the most limited insn first, because there's no point | |
2284 | including more than one in the machine description unless | |
2285 | the more limited one has some advantage. */ | |
2286 | ||
2287 | rtx opalign = GEN_INT (align); | |
2288 | enum machine_mode mode; | |
2289 | ||
2290 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); mode != VOIDmode; | |
2291 | mode = GET_MODE_WIDER_MODE (mode)) | |
2292 | { | |
2293 | enum insn_code code = clrstr_optab[(int) mode]; | |
2294 | ||
2295 | if (code != CODE_FOR_nothing | |
2296 | /* We don't need MODE to be narrower than | |
2297 | BITS_PER_HOST_WIDE_INT here because if SIZE is less than | |
2298 | the mode mask, as it is returned by the macro, it will | |
2299 | definitely be less than the actual mode mask. */ | |
2300 | && ((GET_CODE (size) == CONST_INT | |
2301 | && ((unsigned HOST_WIDE_INT) INTVAL (size) | |
e5e809f4 | 2302 | <= (GET_MODE_MASK (mode) >> 1))) |
9de08200 RK |
2303 | || GET_MODE_BITSIZE (mode) >= BITS_PER_WORD) |
2304 | && (insn_operand_predicate[(int) code][0] == 0 | |
2305 | || (*insn_operand_predicate[(int) code][0]) (object, | |
2306 | BLKmode)) | |
2307 | && (insn_operand_predicate[(int) code][2] == 0 | |
2308 | || (*insn_operand_predicate[(int) code][2]) (opalign, | |
2309 | VOIDmode))) | |
2310 | { | |
2311 | rtx op1; | |
2312 | rtx last = get_last_insn (); | |
2313 | rtx pat; | |
2314 | ||
2315 | op1 = convert_to_mode (mode, size, 1); | |
2316 | if (insn_operand_predicate[(int) code][1] != 0 | |
2317 | && ! (*insn_operand_predicate[(int) code][1]) (op1, | |
2318 | mode)) | |
2319 | op1 = copy_to_mode_reg (mode, op1); | |
2320 | ||
2321 | pat = GEN_FCN ((int) code) (object, op1, opalign); | |
2322 | if (pat) | |
2323 | { | |
2324 | emit_insn (pat); | |
e9a25f70 | 2325 | return 0; |
9de08200 RK |
2326 | } |
2327 | else | |
2328 | delete_insns_since (last); | |
2329 | } | |
2330 | } | |
2331 | ||
2332 | ||
bbf6f052 | 2333 | #ifdef TARGET_MEM_FUNCTIONS |
52cf7115 JL |
2334 | /* It is incorrect to use the libcall calling conventions to call |
2335 | memset in this context. | |
2336 | ||
2337 | This could be a user call to memset and the user may wish to | |
2338 | examine the return value from memset. | |
2339 | ||
2340 | For targets where libcalls and normal calls have different conventions | |
2341 | for returning pointers, we could end up generating incorrect code. | |
2342 | ||
2343 | So instead of using a libcall sequence we build up a suitable | |
2344 | CALL_EXPR and expand the call in the normal fashion. */ | |
2345 | if (fn == NULL_TREE) | |
2346 | { | |
2347 | tree fntype; | |
2348 | ||
2349 | /* This was copied from except.c, I don't know if all this is | |
2350 | necessary in this context or not. */ | |
2351 | fn = get_identifier ("memset"); | |
2352 | push_obstacks_nochange (); | |
2353 | end_temporary_allocation (); | |
2354 | fntype = build_pointer_type (void_type_node); | |
2355 | fntype = build_function_type (fntype, NULL_TREE); | |
2356 | fn = build_decl (FUNCTION_DECL, fn, fntype); | |
2357 | DECL_EXTERNAL (fn) = 1; | |
2358 | TREE_PUBLIC (fn) = 1; | |
2359 | DECL_ARTIFICIAL (fn) = 1; | |
2360 | make_decl_rtl (fn, NULL_PTR, 1); | |
2361 | assemble_external (fn); | |
2362 | pop_obstacks (); | |
2363 | } | |
2364 | ||
2365 | /* We need to make an argument list for the function call. | |
2366 | ||
2367 | memset has three arguments, the first is a void * addresses, the | |
2368 | second a integer with the initialization value, the last is a size_t | |
2369 | byte count for the copy. */ | |
2370 | arg_list | |
2371 | = build_tree_list (NULL_TREE, | |
2372 | make_tree (build_pointer_type (void_type_node), | |
2373 | XEXP (object, 0))); | |
2374 | TREE_CHAIN (arg_list) | |
2375 | = build_tree_list (NULL_TREE, | |
2376 | make_tree (integer_type_node, const0_rtx)); | |
2377 | TREE_CHAIN (TREE_CHAIN (arg_list)) | |
2378 | = build_tree_list (NULL_TREE, make_tree (sizetype, size)); | |
2379 | TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (arg_list))) = NULL_TREE; | |
2380 | ||
2381 | /* Now we have to build up the CALL_EXPR itself. */ | |
2382 | call_expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn); | |
2383 | call_expr = build (CALL_EXPR, TREE_TYPE (TREE_TYPE (fn)), | |
2384 | call_expr, arg_list, NULL_TREE); | |
2385 | TREE_SIDE_EFFECTS (call_expr) = 1; | |
2386 | ||
2387 | retval = expand_expr (call_expr, NULL_RTX, VOIDmode, 0); | |
bbf6f052 | 2388 | #else |
9de08200 RK |
2389 | emit_library_call (bzero_libfunc, 0, |
2390 | VOIDmode, 2, | |
2391 | XEXP (object, 0), Pmode, | |
e9a25f70 JL |
2392 | convert_to_mode |
2393 | (TYPE_MODE (integer_type_node), size, | |
2394 | TREE_UNSIGNED (integer_type_node)), | |
9de08200 | 2395 | TYPE_MODE (integer_type_node)); |
bbf6f052 | 2396 | #endif |
9de08200 | 2397 | } |
bbf6f052 RK |
2398 | } |
2399 | else | |
66ed0683 | 2400 | emit_move_insn (object, CONST0_RTX (GET_MODE (object))); |
e9a25f70 JL |
2401 | |
2402 | return retval; | |
bbf6f052 RK |
2403 | } |
2404 | ||
2405 | /* Generate code to copy Y into X. | |
2406 | Both Y and X must have the same mode, except that | |
2407 | Y can be a constant with VOIDmode. | |
2408 | This mode cannot be BLKmode; use emit_block_move for that. | |
2409 | ||
2410 | Return the last instruction emitted. */ | |
2411 | ||
2412 | rtx | |
2413 | emit_move_insn (x, y) | |
2414 | rtx x, y; | |
2415 | { | |
2416 | enum machine_mode mode = GET_MODE (x); | |
bbf6f052 RK |
2417 | |
2418 | x = protect_from_queue (x, 1); | |
2419 | y = protect_from_queue (y, 0); | |
2420 | ||
2421 | if (mode == BLKmode || (GET_MODE (y) != mode && GET_MODE (y) != VOIDmode)) | |
2422 | abort (); | |
2423 | ||
2424 | if (CONSTANT_P (y) && ! LEGITIMATE_CONSTANT_P (y)) | |
2425 | y = force_const_mem (mode, y); | |
2426 | ||
2427 | /* If X or Y are memory references, verify that their addresses are valid | |
2428 | for the machine. */ | |
2429 | if (GET_CODE (x) == MEM | |
2430 | && ((! memory_address_p (GET_MODE (x), XEXP (x, 0)) | |
2431 | && ! push_operand (x, GET_MODE (x))) | |
2432 | || (flag_force_addr | |
2433 | && CONSTANT_ADDRESS_P (XEXP (x, 0))))) | |
2434 | x = change_address (x, VOIDmode, XEXP (x, 0)); | |
2435 | ||
2436 | if (GET_CODE (y) == MEM | |
2437 | && (! memory_address_p (GET_MODE (y), XEXP (y, 0)) | |
2438 | || (flag_force_addr | |
2439 | && CONSTANT_ADDRESS_P (XEXP (y, 0))))) | |
2440 | y = change_address (y, VOIDmode, XEXP (y, 0)); | |
2441 | ||
2442 | if (mode == BLKmode) | |
2443 | abort (); | |
2444 | ||
261c4230 RS |
2445 | return emit_move_insn_1 (x, y); |
2446 | } | |
2447 | ||
2448 | /* Low level part of emit_move_insn. | |
2449 | Called just like emit_move_insn, but assumes X and Y | |
2450 | are basically valid. */ | |
2451 | ||
2452 | rtx | |
2453 | emit_move_insn_1 (x, y) | |
2454 | rtx x, y; | |
2455 | { | |
2456 | enum machine_mode mode = GET_MODE (x); | |
2457 | enum machine_mode submode; | |
2458 | enum mode_class class = GET_MODE_CLASS (mode); | |
2459 | int i; | |
2460 | ||
bbf6f052 RK |
2461 | if (mov_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing) |
2462 | return | |
2463 | emit_insn (GEN_FCN (mov_optab->handlers[(int) mode].insn_code) (x, y)); | |
2464 | ||
89742723 | 2465 | /* Expand complex moves by moving real part and imag part, if possible. */ |
7308a047 | 2466 | else if ((class == MODE_COMPLEX_FLOAT || class == MODE_COMPLEX_INT) |
d0c76654 RK |
2467 | && BLKmode != (submode = mode_for_size ((GET_MODE_UNIT_SIZE (mode) |
2468 | * BITS_PER_UNIT), | |
2469 | (class == MODE_COMPLEX_INT | |
2470 | ? MODE_INT : MODE_FLOAT), | |
2471 | 0)) | |
7308a047 RS |
2472 | && (mov_optab->handlers[(int) submode].insn_code |
2473 | != CODE_FOR_nothing)) | |
2474 | { | |
2475 | /* Don't split destination if it is a stack push. */ | |
2476 | int stack = push_operand (x, GET_MODE (x)); | |
7308a047 | 2477 | |
7308a047 RS |
2478 | /* If this is a stack, push the highpart first, so it |
2479 | will be in the argument order. | |
2480 | ||
2481 | In that case, change_address is used only to convert | |
2482 | the mode, not to change the address. */ | |
c937357e RS |
2483 | if (stack) |
2484 | { | |
e33c0d66 RS |
2485 | /* Note that the real part always precedes the imag part in memory |
2486 | regardless of machine's endianness. */ | |
c937357e RS |
2487 | #ifdef STACK_GROWS_DOWNWARD |
2488 | emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code) | |
38a448ca | 2489 | (gen_rtx_MEM (submode, (XEXP (x, 0))), |
e33c0d66 | 2490 | gen_imagpart (submode, y))); |
c937357e | 2491 | emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code) |
38a448ca | 2492 | (gen_rtx_MEM (submode, (XEXP (x, 0))), |
e33c0d66 | 2493 | gen_realpart (submode, y))); |
c937357e RS |
2494 | #else |
2495 | emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code) | |
38a448ca | 2496 | (gen_rtx_MEM (submode, (XEXP (x, 0))), |
e33c0d66 | 2497 | gen_realpart (submode, y))); |
c937357e | 2498 | emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code) |
38a448ca | 2499 | (gen_rtx_MEM (submode, (XEXP (x, 0))), |
e33c0d66 | 2500 | gen_imagpart (submode, y))); |
c937357e RS |
2501 | #endif |
2502 | } | |
2503 | else | |
2504 | { | |
2638126a BS |
2505 | /* Show the output dies here. */ |
2506 | if (x != y) | |
9e6a5703 | 2507 | emit_insn (gen_rtx_CLOBBER (VOIDmode, x)); |
2638126a | 2508 | |
c937357e | 2509 | emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code) |
976ff203 | 2510 | (gen_realpart (submode, x), gen_realpart (submode, y))); |
c937357e | 2511 | emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code) |
976ff203 | 2512 | (gen_imagpart (submode, x), gen_imagpart (submode, y))); |
c937357e | 2513 | } |
7308a047 | 2514 | |
7a1ab50a | 2515 | return get_last_insn (); |
7308a047 RS |
2516 | } |
2517 | ||
bbf6f052 RK |
2518 | /* This will handle any multi-word mode that lacks a move_insn pattern. |
2519 | However, you will get better code if you define such patterns, | |
2520 | even if they must turn into multiple assembler instructions. */ | |
a4320483 | 2521 | else if (GET_MODE_SIZE (mode) > UNITS_PER_WORD) |
bbf6f052 RK |
2522 | { |
2523 | rtx last_insn = 0; | |
6551fa4d | 2524 | |
a98c9f1a RK |
2525 | #ifdef PUSH_ROUNDING |
2526 | ||
2527 | /* If X is a push on the stack, do the push now and replace | |
2528 | X with a reference to the stack pointer. */ | |
2529 | if (push_operand (x, GET_MODE (x))) | |
2530 | { | |
2531 | anti_adjust_stack (GEN_INT (GET_MODE_SIZE (GET_MODE (x)))); | |
2532 | x = change_address (x, VOIDmode, stack_pointer_rtx); | |
2533 | } | |
2534 | #endif | |
2535 | ||
15a7a8ec | 2536 | /* Show the output dies here. */ |
43e046cb | 2537 | if (x != y) |
38a448ca | 2538 | emit_insn (gen_rtx_CLOBBER (VOIDmode, x)); |
15a7a8ec | 2539 | |
bbf6f052 RK |
2540 | for (i = 0; |
2541 | i < (GET_MODE_SIZE (mode) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD; | |
2542 | i++) | |
2543 | { | |
2544 | rtx xpart = operand_subword (x, i, 1, mode); | |
2545 | rtx ypart = operand_subword (y, i, 1, mode); | |
2546 | ||
2547 | /* If we can't get a part of Y, put Y into memory if it is a | |
2548 | constant. Otherwise, force it into a register. If we still | |
2549 | can't get a part of Y, abort. */ | |
2550 | if (ypart == 0 && CONSTANT_P (y)) | |
2551 | { | |
2552 | y = force_const_mem (mode, y); | |
2553 | ypart = operand_subword (y, i, 1, mode); | |
2554 | } | |
2555 | else if (ypart == 0) | |
2556 | ypart = operand_subword_force (y, i, mode); | |
2557 | ||
2558 | if (xpart == 0 || ypart == 0) | |
2559 | abort (); | |
2560 | ||
2561 | last_insn = emit_move_insn (xpart, ypart); | |
2562 | } | |
6551fa4d | 2563 | |
bbf6f052 RK |
2564 | return last_insn; |
2565 | } | |
2566 | else | |
2567 | abort (); | |
2568 | } | |
2569 | \f | |
2570 | /* Pushing data onto the stack. */ | |
2571 | ||
2572 | /* Push a block of length SIZE (perhaps variable) | |
2573 | and return an rtx to address the beginning of the block. | |
2574 | Note that it is not possible for the value returned to be a QUEUED. | |
2575 | The value may be virtual_outgoing_args_rtx. | |
2576 | ||
2577 | EXTRA is the number of bytes of padding to push in addition to SIZE. | |
2578 | BELOW nonzero means this padding comes at low addresses; | |
2579 | otherwise, the padding comes at high addresses. */ | |
2580 | ||
2581 | rtx | |
2582 | push_block (size, extra, below) | |
2583 | rtx size; | |
2584 | int extra, below; | |
2585 | { | |
2586 | register rtx temp; | |
88f63c77 RK |
2587 | |
2588 | size = convert_modes (Pmode, ptr_mode, size, 1); | |
bbf6f052 RK |
2589 | if (CONSTANT_P (size)) |
2590 | anti_adjust_stack (plus_constant (size, extra)); | |
2591 | else if (GET_CODE (size) == REG && extra == 0) | |
2592 | anti_adjust_stack (size); | |
2593 | else | |
2594 | { | |
2595 | rtx temp = copy_to_mode_reg (Pmode, size); | |
2596 | if (extra != 0) | |
906c4e36 | 2597 | temp = expand_binop (Pmode, add_optab, temp, GEN_INT (extra), |
bbf6f052 RK |
2598 | temp, 0, OPTAB_LIB_WIDEN); |
2599 | anti_adjust_stack (temp); | |
2600 | } | |
2601 | ||
2602 | #ifdef STACK_GROWS_DOWNWARD | |
2603 | temp = virtual_outgoing_args_rtx; | |
2604 | if (extra != 0 && below) | |
2605 | temp = plus_constant (temp, extra); | |
2606 | #else | |
2607 | if (GET_CODE (size) == CONST_INT) | |
2608 | temp = plus_constant (virtual_outgoing_args_rtx, | |
2609 | - INTVAL (size) - (below ? 0 : extra)); | |
2610 | else if (extra != 0 && !below) | |
38a448ca | 2611 | temp = gen_rtx_PLUS (Pmode, virtual_outgoing_args_rtx, |
bbf6f052 RK |
2612 | negate_rtx (Pmode, plus_constant (size, extra))); |
2613 | else | |
38a448ca | 2614 | temp = gen_rtx_PLUS (Pmode, virtual_outgoing_args_rtx, |
bbf6f052 RK |
2615 | negate_rtx (Pmode, size)); |
2616 | #endif | |
2617 | ||
2618 | return memory_address (GET_CLASS_NARROWEST_MODE (MODE_INT), temp); | |
2619 | } | |
2620 | ||
87e38d84 | 2621 | rtx |
bbf6f052 RK |
2622 | gen_push_operand () |
2623 | { | |
38a448ca | 2624 | return gen_rtx_fmt_e (STACK_PUSH_CODE, Pmode, stack_pointer_rtx); |
bbf6f052 RK |
2625 | } |
2626 | ||
921b3427 RK |
2627 | /* Return an rtx for the address of the beginning of a as-if-it-was-pushed |
2628 | block of SIZE bytes. */ | |
2629 | ||
2630 | static rtx | |
2631 | get_push_address (size) | |
2632 | int size; | |
2633 | { | |
2634 | register rtx temp; | |
2635 | ||
2636 | if (STACK_PUSH_CODE == POST_DEC) | |
38a448ca | 2637 | temp = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (size)); |
921b3427 | 2638 | else if (STACK_PUSH_CODE == POST_INC) |
38a448ca | 2639 | temp = gen_rtx_MINUS (Pmode, stack_pointer_rtx, GEN_INT (size)); |
921b3427 RK |
2640 | else |
2641 | temp = stack_pointer_rtx; | |
2642 | ||
c85f7c16 | 2643 | return copy_to_reg (temp); |
921b3427 RK |
2644 | } |
2645 | ||
bbf6f052 RK |
2646 | /* Generate code to push X onto the stack, assuming it has mode MODE and |
2647 | type TYPE. | |
2648 | MODE is redundant except when X is a CONST_INT (since they don't | |
2649 | carry mode info). | |
2650 | SIZE is an rtx for the size of data to be copied (in bytes), | |
2651 | needed only if X is BLKmode. | |
2652 | ||
2653 | ALIGN (in bytes) is maximum alignment we can assume. | |
2654 | ||
cd048831 RK |
2655 | If PARTIAL and REG are both nonzero, then copy that many of the first |
2656 | words of X into registers starting with REG, and push the rest of X. | |
bbf6f052 RK |
2657 | The amount of space pushed is decreased by PARTIAL words, |
2658 | rounded *down* to a multiple of PARM_BOUNDARY. | |
2659 | REG must be a hard register in this case. | |
cd048831 RK |
2660 | If REG is zero but PARTIAL is not, take any all others actions for an |
2661 | argument partially in registers, but do not actually load any | |
2662 | registers. | |
bbf6f052 RK |
2663 | |
2664 | EXTRA is the amount in bytes of extra space to leave next to this arg. | |
6dc42e49 | 2665 | This is ignored if an argument block has already been allocated. |
bbf6f052 RK |
2666 | |
2667 | On a machine that lacks real push insns, ARGS_ADDR is the address of | |
2668 | the bottom of the argument block for this call. We use indexing off there | |
2669 | to store the arg. On machines with push insns, ARGS_ADDR is 0 when a | |
2670 | argument block has not been preallocated. | |
2671 | ||
e5e809f4 JL |
2672 | ARGS_SO_FAR is the size of args previously pushed for this call. |
2673 | ||
2674 | REG_PARM_STACK_SPACE is nonzero if functions require stack space | |
2675 | for arguments passed in registers. If nonzero, it will be the number | |
2676 | of bytes required. */ | |
bbf6f052 RK |
2677 | |
2678 | void | |
2679 | emit_push_insn (x, mode, type, size, align, partial, reg, extra, | |
e5e809f4 | 2680 | args_addr, args_so_far, reg_parm_stack_space) |
bbf6f052 RK |
2681 | register rtx x; |
2682 | enum machine_mode mode; | |
2683 | tree type; | |
2684 | rtx size; | |
2685 | int align; | |
2686 | int partial; | |
2687 | rtx reg; | |
2688 | int extra; | |
2689 | rtx args_addr; | |
2690 | rtx args_so_far; | |
e5e809f4 | 2691 | int reg_parm_stack_space; |
bbf6f052 RK |
2692 | { |
2693 | rtx xinner; | |
2694 | enum direction stack_direction | |
2695 | #ifdef STACK_GROWS_DOWNWARD | |
2696 | = downward; | |
2697 | #else | |
2698 | = upward; | |
2699 | #endif | |
2700 | ||
2701 | /* Decide where to pad the argument: `downward' for below, | |
2702 | `upward' for above, or `none' for don't pad it. | |
2703 | Default is below for small data on big-endian machines; else above. */ | |
2704 | enum direction where_pad = FUNCTION_ARG_PADDING (mode, type); | |
2705 | ||
2706 | /* Invert direction if stack is post-update. */ | |
2707 | if (STACK_PUSH_CODE == POST_INC || STACK_PUSH_CODE == POST_DEC) | |
2708 | if (where_pad != none) | |
2709 | where_pad = (where_pad == downward ? upward : downward); | |
2710 | ||
2711 | xinner = x = protect_from_queue (x, 0); | |
2712 | ||
2713 | if (mode == BLKmode) | |
2714 | { | |
2715 | /* Copy a block into the stack, entirely or partially. */ | |
2716 | ||
2717 | register rtx temp; | |
2718 | int used = partial * UNITS_PER_WORD; | |
2719 | int offset = used % (PARM_BOUNDARY / BITS_PER_UNIT); | |
2720 | int skip; | |
2721 | ||
2722 | if (size == 0) | |
2723 | abort (); | |
2724 | ||
2725 | used -= offset; | |
2726 | ||
2727 | /* USED is now the # of bytes we need not copy to the stack | |
2728 | because registers will take care of them. */ | |
2729 | ||
2730 | if (partial != 0) | |
2731 | xinner = change_address (xinner, BLKmode, | |
2732 | plus_constant (XEXP (xinner, 0), used)); | |
2733 | ||
2734 | /* If the partial register-part of the arg counts in its stack size, | |
2735 | skip the part of stack space corresponding to the registers. | |
2736 | Otherwise, start copying to the beginning of the stack space, | |
2737 | by setting SKIP to 0. */ | |
e5e809f4 | 2738 | skip = (reg_parm_stack_space == 0) ? 0 : used; |
bbf6f052 RK |
2739 | |
2740 | #ifdef PUSH_ROUNDING | |
2741 | /* Do it with several push insns if that doesn't take lots of insns | |
2742 | and if there is no difficulty with push insns that skip bytes | |
2743 | on the stack for alignment purposes. */ | |
2744 | if (args_addr == 0 | |
2745 | && GET_CODE (size) == CONST_INT | |
2746 | && skip == 0 | |
2747 | && (move_by_pieces_ninsns ((unsigned) INTVAL (size) - used, align) | |
2748 | < MOVE_RATIO) | |
bbf6f052 RK |
2749 | /* Here we avoid the case of a structure whose weak alignment |
2750 | forces many pushes of a small amount of data, | |
2751 | and such small pushes do rounding that causes trouble. */ | |
c7a7ac46 | 2752 | && ((! SLOW_UNALIGNED_ACCESS) |
e87b4f3f | 2753 | || align >= BIGGEST_ALIGNMENT / BITS_PER_UNIT |
bbf6f052 | 2754 | || PUSH_ROUNDING (align) == align) |
bbf6f052 RK |
2755 | && PUSH_ROUNDING (INTVAL (size)) == INTVAL (size)) |
2756 | { | |
2757 | /* Push padding now if padding above and stack grows down, | |
2758 | or if padding below and stack grows up. | |
2759 | But if space already allocated, this has already been done. */ | |
2760 | if (extra && args_addr == 0 | |
2761 | && where_pad != none && where_pad != stack_direction) | |
906c4e36 | 2762 | anti_adjust_stack (GEN_INT (extra)); |
bbf6f052 | 2763 | |
38a448ca | 2764 | move_by_pieces (gen_rtx_MEM (BLKmode, gen_push_operand ()), xinner, |
bbf6f052 | 2765 | INTVAL (size) - used, align); |
921b3427 | 2766 | |
956d6950 | 2767 | if (flag_check_memory_usage && ! in_check_memory_usage) |
921b3427 RK |
2768 | { |
2769 | rtx temp; | |
2770 | ||
956d6950 | 2771 | in_check_memory_usage = 1; |
921b3427 | 2772 | temp = get_push_address (INTVAL(size) - used); |
c85f7c16 | 2773 | if (GET_CODE (x) == MEM && type && AGGREGATE_TYPE_P (type)) |
921b3427 RK |
2774 | emit_library_call (chkr_copy_bitmap_libfunc, 1, VOIDmode, 3, |
2775 | temp, ptr_mode, | |
2776 | XEXP (xinner, 0), ptr_mode, | |
2777 | GEN_INT (INTVAL(size) - used), | |
2778 | TYPE_MODE (sizetype)); | |
2779 | else | |
2780 | emit_library_call (chkr_set_right_libfunc, 1, VOIDmode, 3, | |
2781 | temp, ptr_mode, | |
2782 | GEN_INT (INTVAL(size) - used), | |
2783 | TYPE_MODE (sizetype), | |
956d6950 JL |
2784 | GEN_INT (MEMORY_USE_RW), |
2785 | TYPE_MODE (integer_type_node)); | |
2786 | in_check_memory_usage = 0; | |
921b3427 | 2787 | } |
bbf6f052 RK |
2788 | } |
2789 | else | |
2790 | #endif /* PUSH_ROUNDING */ | |
2791 | { | |
2792 | /* Otherwise make space on the stack and copy the data | |
2793 | to the address of that space. */ | |
2794 | ||
2795 | /* Deduct words put into registers from the size we must copy. */ | |
2796 | if (partial != 0) | |
2797 | { | |
2798 | if (GET_CODE (size) == CONST_INT) | |
906c4e36 | 2799 | size = GEN_INT (INTVAL (size) - used); |
bbf6f052 RK |
2800 | else |
2801 | size = expand_binop (GET_MODE (size), sub_optab, size, | |
906c4e36 RK |
2802 | GEN_INT (used), NULL_RTX, 0, |
2803 | OPTAB_LIB_WIDEN); | |
bbf6f052 RK |
2804 | } |
2805 | ||
2806 | /* Get the address of the stack space. | |
2807 | In this case, we do not deal with EXTRA separately. | |
2808 | A single stack adjust will do. */ | |
2809 | if (! args_addr) | |
2810 | { | |
2811 | temp = push_block (size, extra, where_pad == downward); | |
2812 | extra = 0; | |
2813 | } | |
2814 | else if (GET_CODE (args_so_far) == CONST_INT) | |
2815 | temp = memory_address (BLKmode, | |
2816 | plus_constant (args_addr, | |
2817 | skip + INTVAL (args_so_far))); | |
2818 | else | |
2819 | temp = memory_address (BLKmode, | |
38a448ca RH |
2820 | plus_constant (gen_rtx_PLUS (Pmode, |
2821 | args_addr, | |
2822 | args_so_far), | |
bbf6f052 | 2823 | skip)); |
956d6950 | 2824 | if (flag_check_memory_usage && ! in_check_memory_usage) |
921b3427 RK |
2825 | { |
2826 | rtx target; | |
2827 | ||
956d6950 | 2828 | in_check_memory_usage = 1; |
921b3427 | 2829 | target = copy_to_reg (temp); |
c85f7c16 | 2830 | if (GET_CODE (x) == MEM && type && AGGREGATE_TYPE_P (type)) |
921b3427 RK |
2831 | emit_library_call (chkr_copy_bitmap_libfunc, 1, VOIDmode, 3, |
2832 | target, ptr_mode, | |
2833 | XEXP (xinner, 0), ptr_mode, | |
2834 | size, TYPE_MODE (sizetype)); | |
2835 | else | |
2836 | emit_library_call (chkr_set_right_libfunc, 1, VOIDmode, 3, | |
2837 | target, ptr_mode, | |
2838 | size, TYPE_MODE (sizetype), | |
956d6950 JL |
2839 | GEN_INT (MEMORY_USE_RW), |
2840 | TYPE_MODE (integer_type_node)); | |
2841 | in_check_memory_usage = 0; | |
921b3427 | 2842 | } |
bbf6f052 RK |
2843 | |
2844 | /* TEMP is the address of the block. Copy the data there. */ | |
2845 | if (GET_CODE (size) == CONST_INT | |
2846 | && (move_by_pieces_ninsns ((unsigned) INTVAL (size), align) | |
2847 | < MOVE_RATIO)) | |
2848 | { | |
38a448ca | 2849 | move_by_pieces (gen_rtx_MEM (BLKmode, temp), xinner, |
bbf6f052 RK |
2850 | INTVAL (size), align); |
2851 | goto ret; | |
2852 | } | |
e5e809f4 | 2853 | else |
bbf6f052 | 2854 | { |
e5e809f4 JL |
2855 | rtx opalign = GEN_INT (align); |
2856 | enum machine_mode mode; | |
9e6a5703 | 2857 | rtx target = gen_rtx_MEM (BLKmode, temp); |
e5e809f4 JL |
2858 | |
2859 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); | |
2860 | mode != VOIDmode; | |
2861 | mode = GET_MODE_WIDER_MODE (mode)) | |
c841050e | 2862 | { |
e5e809f4 JL |
2863 | enum insn_code code = movstr_optab[(int) mode]; |
2864 | ||
2865 | if (code != CODE_FOR_nothing | |
2866 | && ((GET_CODE (size) == CONST_INT | |
2867 | && ((unsigned HOST_WIDE_INT) INTVAL (size) | |
2868 | <= (GET_MODE_MASK (mode) >> 1))) | |
2869 | || GET_MODE_BITSIZE (mode) >= BITS_PER_WORD) | |
2870 | && (insn_operand_predicate[(int) code][0] == 0 | |
2871 | || ((*insn_operand_predicate[(int) code][0]) | |
2872 | (target, BLKmode))) | |
2873 | && (insn_operand_predicate[(int) code][1] == 0 | |
2874 | || ((*insn_operand_predicate[(int) code][1]) | |
2875 | (xinner, BLKmode))) | |
2876 | && (insn_operand_predicate[(int) code][3] == 0 | |
2877 | || ((*insn_operand_predicate[(int) code][3]) | |
2878 | (opalign, VOIDmode)))) | |
2879 | { | |
2880 | rtx op2 = convert_to_mode (mode, size, 1); | |
2881 | rtx last = get_last_insn (); | |
2882 | rtx pat; | |
2883 | ||
2884 | if (insn_operand_predicate[(int) code][2] != 0 | |
2885 | && ! ((*insn_operand_predicate[(int) code][2]) | |
2886 | (op2, mode))) | |
2887 | op2 = copy_to_mode_reg (mode, op2); | |
2888 | ||
2889 | pat = GEN_FCN ((int) code) (target, xinner, | |
2890 | op2, opalign); | |
2891 | if (pat) | |
2892 | { | |
2893 | emit_insn (pat); | |
2894 | goto ret; | |
2895 | } | |
2896 | else | |
2897 | delete_insns_since (last); | |
2898 | } | |
c841050e | 2899 | } |
bbf6f052 | 2900 | } |
bbf6f052 RK |
2901 | |
2902 | #ifndef ACCUMULATE_OUTGOING_ARGS | |
2903 | /* If the source is referenced relative to the stack pointer, | |
2904 | copy it to another register to stabilize it. We do not need | |
2905 | to do this if we know that we won't be changing sp. */ | |
2906 | ||
2907 | if (reg_mentioned_p (virtual_stack_dynamic_rtx, temp) | |
2908 | || reg_mentioned_p (virtual_outgoing_args_rtx, temp)) | |
2909 | temp = copy_to_reg (temp); | |
2910 | #endif | |
2911 | ||
2912 | /* Make inhibit_defer_pop nonzero around the library call | |
2913 | to force it to pop the bcopy-arguments right away. */ | |
2914 | NO_DEFER_POP; | |
2915 | #ifdef TARGET_MEM_FUNCTIONS | |
d562e42e | 2916 | emit_library_call (memcpy_libfunc, 0, |
bbf6f052 | 2917 | VOIDmode, 3, temp, Pmode, XEXP (xinner, 0), Pmode, |
0fa83258 RK |
2918 | convert_to_mode (TYPE_MODE (sizetype), |
2919 | size, TREE_UNSIGNED (sizetype)), | |
26ba80fc | 2920 | TYPE_MODE (sizetype)); |
bbf6f052 | 2921 | #else |
d562e42e | 2922 | emit_library_call (bcopy_libfunc, 0, |
bbf6f052 | 2923 | VOIDmode, 3, XEXP (xinner, 0), Pmode, temp, Pmode, |
3b6f75e2 JW |
2924 | convert_to_mode (TYPE_MODE (integer_type_node), |
2925 | size, | |
2926 | TREE_UNSIGNED (integer_type_node)), | |
2927 | TYPE_MODE (integer_type_node)); | |
bbf6f052 RK |
2928 | #endif |
2929 | OK_DEFER_POP; | |
2930 | } | |
2931 | } | |
2932 | else if (partial > 0) | |
2933 | { | |
2934 | /* Scalar partly in registers. */ | |
2935 | ||
2936 | int size = GET_MODE_SIZE (mode) / UNITS_PER_WORD; | |
2937 | int i; | |
2938 | int not_stack; | |
2939 | /* # words of start of argument | |
2940 | that we must make space for but need not store. */ | |
2941 | int offset = partial % (PARM_BOUNDARY / BITS_PER_WORD); | |
2942 | int args_offset = INTVAL (args_so_far); | |
2943 | int skip; | |
2944 | ||
2945 | /* Push padding now if padding above and stack grows down, | |
2946 | or if padding below and stack grows up. | |
2947 | But if space already allocated, this has already been done. */ | |
2948 | if (extra && args_addr == 0 | |
2949 | && where_pad != none && where_pad != stack_direction) | |
906c4e36 | 2950 | anti_adjust_stack (GEN_INT (extra)); |
bbf6f052 RK |
2951 | |
2952 | /* If we make space by pushing it, we might as well push | |
2953 | the real data. Otherwise, we can leave OFFSET nonzero | |
2954 | and leave the space uninitialized. */ | |
2955 | if (args_addr == 0) | |
2956 | offset = 0; | |
2957 | ||
2958 | /* Now NOT_STACK gets the number of words that we don't need to | |
2959 | allocate on the stack. */ | |
2960 | not_stack = partial - offset; | |
2961 | ||
2962 | /* If the partial register-part of the arg counts in its stack size, | |
2963 | skip the part of stack space corresponding to the registers. | |
2964 | Otherwise, start copying to the beginning of the stack space, | |
2965 | by setting SKIP to 0. */ | |
e5e809f4 | 2966 | skip = (reg_parm_stack_space == 0) ? 0 : not_stack; |
bbf6f052 RK |
2967 | |
2968 | if (CONSTANT_P (x) && ! LEGITIMATE_CONSTANT_P (x)) | |
2969 | x = validize_mem (force_const_mem (mode, x)); | |
2970 | ||
2971 | /* If X is a hard register in a non-integer mode, copy it into a pseudo; | |
2972 | SUBREGs of such registers are not allowed. */ | |
2973 | if ((GET_CODE (x) == REG && REGNO (x) < FIRST_PSEUDO_REGISTER | |
2974 | && GET_MODE_CLASS (GET_MODE (x)) != MODE_INT)) | |
2975 | x = copy_to_reg (x); | |
2976 | ||
2977 | /* Loop over all the words allocated on the stack for this arg. */ | |
2978 | /* We can do it by words, because any scalar bigger than a word | |
2979 | has a size a multiple of a word. */ | |
2980 | #ifndef PUSH_ARGS_REVERSED | |
2981 | for (i = not_stack; i < size; i++) | |
2982 | #else | |
2983 | for (i = size - 1; i >= not_stack; i--) | |
2984 | #endif | |
2985 | if (i >= not_stack + offset) | |
2986 | emit_push_insn (operand_subword_force (x, i, mode), | |
906c4e36 RK |
2987 | word_mode, NULL_TREE, NULL_RTX, align, 0, NULL_RTX, |
2988 | 0, args_addr, | |
2989 | GEN_INT (args_offset + ((i - not_stack + skip) | |
e5e809f4 JL |
2990 | * UNITS_PER_WORD)), |
2991 | reg_parm_stack_space); | |
bbf6f052 RK |
2992 | } |
2993 | else | |
2994 | { | |
2995 | rtx addr; | |
921b3427 | 2996 | rtx target = NULL_RTX; |
bbf6f052 RK |
2997 | |
2998 | /* Push padding now if padding above and stack grows down, | |
2999 | or if padding below and stack grows up. | |
3000 | But if space already allocated, this has already been done. */ | |
3001 | if (extra && args_addr == 0 | |
3002 | && where_pad != none && where_pad != stack_direction) | |
906c4e36 | 3003 | anti_adjust_stack (GEN_INT (extra)); |
bbf6f052 RK |
3004 | |
3005 | #ifdef PUSH_ROUNDING | |
3006 | if (args_addr == 0) | |
3007 | addr = gen_push_operand (); | |
3008 | else | |
3009 | #endif | |
921b3427 RK |
3010 | { |
3011 | if (GET_CODE (args_so_far) == CONST_INT) | |
3012 | addr | |
3013 | = memory_address (mode, | |
3014 | plus_constant (args_addr, | |
3015 | INTVAL (args_so_far))); | |
3016 | else | |
38a448ca RH |
3017 | addr = memory_address (mode, gen_rtx_PLUS (Pmode, args_addr, |
3018 | args_so_far)); | |
921b3427 RK |
3019 | target = addr; |
3020 | } | |
bbf6f052 | 3021 | |
38a448ca | 3022 | emit_move_insn (gen_rtx_MEM (mode, addr), x); |
921b3427 | 3023 | |
956d6950 | 3024 | if (flag_check_memory_usage && ! in_check_memory_usage) |
921b3427 | 3025 | { |
956d6950 | 3026 | in_check_memory_usage = 1; |
921b3427 RK |
3027 | if (target == 0) |
3028 | target = get_push_address (GET_MODE_SIZE (mode)); | |
3029 | ||
c85f7c16 | 3030 | if (GET_CODE (x) == MEM && type && AGGREGATE_TYPE_P (type)) |
921b3427 RK |
3031 | emit_library_call (chkr_copy_bitmap_libfunc, 1, VOIDmode, 3, |
3032 | target, ptr_mode, | |
3033 | XEXP (x, 0), ptr_mode, | |
3034 | GEN_INT (GET_MODE_SIZE (mode)), | |
3035 | TYPE_MODE (sizetype)); | |
3036 | else | |
3037 | emit_library_call (chkr_set_right_libfunc, 1, VOIDmode, 3, | |
3038 | target, ptr_mode, | |
3039 | GEN_INT (GET_MODE_SIZE (mode)), | |
3040 | TYPE_MODE (sizetype), | |
956d6950 JL |
3041 | GEN_INT (MEMORY_USE_RW), |
3042 | TYPE_MODE (integer_type_node)); | |
3043 | in_check_memory_usage = 0; | |
921b3427 | 3044 | } |
bbf6f052 RK |
3045 | } |
3046 | ||
3047 | ret: | |
3048 | /* If part should go in registers, copy that part | |
3049 | into the appropriate registers. Do this now, at the end, | |
3050 | since mem-to-mem copies above may do function calls. */ | |
cd048831 | 3051 | if (partial > 0 && reg != 0) |
fffa9c1d JW |
3052 | { |
3053 | /* Handle calls that pass values in multiple non-contiguous locations. | |
3054 | The Irix 6 ABI has examples of this. */ | |
3055 | if (GET_CODE (reg) == PARALLEL) | |
aac5cc16 | 3056 | emit_group_load (reg, x, -1, align); /* ??? size? */ |
fffa9c1d JW |
3057 | else |
3058 | move_block_to_reg (REGNO (reg), x, partial, mode); | |
3059 | } | |
bbf6f052 RK |
3060 | |
3061 | if (extra && args_addr == 0 && where_pad == stack_direction) | |
906c4e36 | 3062 | anti_adjust_stack (GEN_INT (extra)); |
bbf6f052 RK |
3063 | } |
3064 | \f | |
bbf6f052 RK |
3065 | /* Expand an assignment that stores the value of FROM into TO. |
3066 | If WANT_VALUE is nonzero, return an rtx for the value of TO. | |
709f5be1 RS |
3067 | (This may contain a QUEUED rtx; |
3068 | if the value is constant, this rtx is a constant.) | |
3069 | Otherwise, the returned value is NULL_RTX. | |
bbf6f052 RK |
3070 | |
3071 | SUGGEST_REG is no longer actually used. | |
3072 | It used to mean, copy the value through a register | |
3073 | and return that register, if that is possible. | |
709f5be1 | 3074 | We now use WANT_VALUE to decide whether to do this. */ |
bbf6f052 RK |
3075 | |
3076 | rtx | |
3077 | expand_assignment (to, from, want_value, suggest_reg) | |
3078 | tree to, from; | |
3079 | int want_value; | |
3080 | int suggest_reg; | |
3081 | { | |
3082 | register rtx to_rtx = 0; | |
3083 | rtx result; | |
3084 | ||
3085 | /* Don't crash if the lhs of the assignment was erroneous. */ | |
3086 | ||
3087 | if (TREE_CODE (to) == ERROR_MARK) | |
709f5be1 RS |
3088 | { |
3089 | result = expand_expr (from, NULL_RTX, VOIDmode, 0); | |
3090 | return want_value ? result : NULL_RTX; | |
3091 | } | |
bbf6f052 RK |
3092 | |
3093 | /* Assignment of a structure component needs special treatment | |
3094 | if the structure component's rtx is not simply a MEM. | |
6be58303 JW |
3095 | Assignment of an array element at a constant index, and assignment of |
3096 | an array element in an unaligned packed structure field, has the same | |
3097 | problem. */ | |
bbf6f052 | 3098 | |
08293add RK |
3099 | if (TREE_CODE (to) == COMPONENT_REF || TREE_CODE (to) == BIT_FIELD_REF |
3100 | || TREE_CODE (to) == ARRAY_REF) | |
bbf6f052 RK |
3101 | { |
3102 | enum machine_mode mode1; | |
3103 | int bitsize; | |
3104 | int bitpos; | |
7bb0943f | 3105 | tree offset; |
bbf6f052 RK |
3106 | int unsignedp; |
3107 | int volatilep = 0; | |
0088fcb1 | 3108 | tree tem; |
d78d243c | 3109 | int alignment; |
0088fcb1 RK |
3110 | |
3111 | push_temp_slots (); | |
839c4796 RK |
3112 | tem = get_inner_reference (to, &bitsize, &bitpos, &offset, &mode1, |
3113 | &unsignedp, &volatilep, &alignment); | |
bbf6f052 RK |
3114 | |
3115 | /* If we are going to use store_bit_field and extract_bit_field, | |
3116 | make sure to_rtx will be safe for multiple use. */ | |
3117 | ||
3118 | if (mode1 == VOIDmode && want_value) | |
3119 | tem = stabilize_reference (tem); | |
3120 | ||
921b3427 | 3121 | to_rtx = expand_expr (tem, NULL_RTX, VOIDmode, EXPAND_MEMORY_USE_DONT); |
7bb0943f RS |
3122 | if (offset != 0) |
3123 | { | |
906c4e36 | 3124 | rtx offset_rtx = expand_expr (offset, NULL_RTX, VOIDmode, 0); |
7bb0943f RS |
3125 | |
3126 | if (GET_CODE (to_rtx) != MEM) | |
3127 | abort (); | |
bd070e1a RH |
3128 | |
3129 | if (GET_MODE (offset_rtx) != ptr_mode) | |
3130 | { | |
3131 | #ifdef POINTERS_EXTEND_UNSIGNED | |
822a3443 | 3132 | offset_rtx = convert_memory_address (ptr_mode, offset_rtx); |
bd070e1a RH |
3133 | #else |
3134 | offset_rtx = convert_to_mode (ptr_mode, offset_rtx, 0); | |
3135 | #endif | |
3136 | } | |
3137 | ||
89752202 HB |
3138 | if (GET_CODE (to_rtx) == MEM |
3139 | && GET_MODE (to_rtx) == BLKmode | |
3140 | && bitsize | |
3141 | && (bitpos % bitsize) == 0 | |
3142 | && (bitsize % GET_MODE_ALIGNMENT (mode1)) == 0 | |
3143 | && (alignment * BITS_PER_UNIT) == GET_MODE_ALIGNMENT (mode1)) | |
3144 | { | |
3145 | rtx temp = change_address (to_rtx, mode1, | |
3146 | plus_constant (XEXP (to_rtx, 0), | |
3147 | (bitpos / | |
3148 | BITS_PER_UNIT))); | |
3149 | if (GET_CODE (XEXP (temp, 0)) == REG) | |
3150 | to_rtx = temp; | |
3151 | else | |
3152 | to_rtx = change_address (to_rtx, mode1, | |
3153 | force_reg (GET_MODE (XEXP (temp, 0)), | |
3154 | XEXP (temp, 0))); | |
3155 | bitpos = 0; | |
3156 | } | |
3157 | ||
7bb0943f | 3158 | to_rtx = change_address (to_rtx, VOIDmode, |
38a448ca RH |
3159 | gen_rtx_PLUS (ptr_mode, XEXP (to_rtx, 0), |
3160 | force_reg (ptr_mode, offset_rtx))); | |
7bb0943f | 3161 | } |
bbf6f052 RK |
3162 | if (volatilep) |
3163 | { | |
3164 | if (GET_CODE (to_rtx) == MEM) | |
01188446 JW |
3165 | { |
3166 | /* When the offset is zero, to_rtx is the address of the | |
3167 | structure we are storing into, and hence may be shared. | |
3168 | We must make a new MEM before setting the volatile bit. */ | |
3169 | if (offset == 0) | |
effbcc6a RK |
3170 | to_rtx = copy_rtx (to_rtx); |
3171 | ||
01188446 JW |
3172 | MEM_VOLATILE_P (to_rtx) = 1; |
3173 | } | |
bbf6f052 RK |
3174 | #if 0 /* This was turned off because, when a field is volatile |
3175 | in an object which is not volatile, the object may be in a register, | |
3176 | and then we would abort over here. */ | |
3177 | else | |
3178 | abort (); | |
3179 | #endif | |
3180 | } | |
3181 | ||
956d6950 JL |
3182 | if (TREE_CODE (to) == COMPONENT_REF |
3183 | && TREE_READONLY (TREE_OPERAND (to, 1))) | |
3184 | { | |
8bd6ecc2 | 3185 | if (offset == 0) |
956d6950 JL |
3186 | to_rtx = copy_rtx (to_rtx); |
3187 | ||
3188 | RTX_UNCHANGING_P (to_rtx) = 1; | |
3189 | } | |
3190 | ||
921b3427 RK |
3191 | /* Check the access. */ |
3192 | if (flag_check_memory_usage && GET_CODE (to_rtx) == MEM) | |
3193 | { | |
3194 | rtx to_addr; | |
3195 | int size; | |
3196 | int best_mode_size; | |
3197 | enum machine_mode best_mode; | |
3198 | ||
3199 | best_mode = get_best_mode (bitsize, bitpos, | |
3200 | TYPE_ALIGN (TREE_TYPE (tem)), | |
3201 | mode1, volatilep); | |
3202 | if (best_mode == VOIDmode) | |
3203 | best_mode = QImode; | |
3204 | ||
3205 | best_mode_size = GET_MODE_BITSIZE (best_mode); | |
3206 | to_addr = plus_constant (XEXP (to_rtx, 0), (bitpos / BITS_PER_UNIT)); | |
3207 | size = CEIL ((bitpos % best_mode_size) + bitsize, best_mode_size); | |
3208 | size *= GET_MODE_SIZE (best_mode); | |
3209 | ||
3210 | /* Check the access right of the pointer. */ | |
e9a25f70 JL |
3211 | if (size) |
3212 | emit_library_call (chkr_check_addr_libfunc, 1, VOIDmode, 3, | |
3213 | to_addr, ptr_mode, | |
3214 | GEN_INT (size), TYPE_MODE (sizetype), | |
956d6950 JL |
3215 | GEN_INT (MEMORY_USE_WO), |
3216 | TYPE_MODE (integer_type_node)); | |
921b3427 RK |
3217 | } |
3218 | ||
bbf6f052 RK |
3219 | result = store_field (to_rtx, bitsize, bitpos, mode1, from, |
3220 | (want_value | |
3221 | /* Spurious cast makes HPUX compiler happy. */ | |
3222 | ? (enum machine_mode) TYPE_MODE (TREE_TYPE (to)) | |
3223 | : VOIDmode), | |
3224 | unsignedp, | |
3225 | /* Required alignment of containing datum. */ | |
d78d243c | 3226 | alignment, |
ece32014 MM |
3227 | int_size_in_bytes (TREE_TYPE (tem)), |
3228 | get_alias_set (to)); | |
bbf6f052 RK |
3229 | preserve_temp_slots (result); |
3230 | free_temp_slots (); | |
0088fcb1 | 3231 | pop_temp_slots (); |
bbf6f052 | 3232 | |
709f5be1 RS |
3233 | /* If the value is meaningful, convert RESULT to the proper mode. |
3234 | Otherwise, return nothing. */ | |
5ffe63ed RS |
3235 | return (want_value ? convert_modes (TYPE_MODE (TREE_TYPE (to)), |
3236 | TYPE_MODE (TREE_TYPE (from)), | |
3237 | result, | |
3238 | TREE_UNSIGNED (TREE_TYPE (to))) | |
709f5be1 | 3239 | : NULL_RTX); |
bbf6f052 RK |
3240 | } |
3241 | ||
cd1db108 RS |
3242 | /* If the rhs is a function call and its value is not an aggregate, |
3243 | call the function before we start to compute the lhs. | |
3244 | This is needed for correct code for cases such as | |
3245 | val = setjmp (buf) on machines where reference to val | |
1ad87b63 RK |
3246 | requires loading up part of an address in a separate insn. |
3247 | ||
3248 | Don't do this if TO is a VAR_DECL whose DECL_RTL is REG since it might be | |
3249 | a promoted variable where the zero- or sign- extension needs to be done. | |
3250 | Handling this in the normal way is safe because no computation is done | |
3251 | before the call. */ | |
3252 | if (TREE_CODE (from) == CALL_EXPR && ! aggregate_value_p (from) | |
b35cd3c1 | 3253 | && TREE_CODE (TYPE_SIZE (TREE_TYPE (from))) == INTEGER_CST |
1ad87b63 | 3254 | && ! (TREE_CODE (to) == VAR_DECL && GET_CODE (DECL_RTL (to)) == REG)) |
cd1db108 | 3255 | { |
0088fcb1 RK |
3256 | rtx value; |
3257 | ||
3258 | push_temp_slots (); | |
3259 | value = expand_expr (from, NULL_RTX, VOIDmode, 0); | |
cd1db108 | 3260 | if (to_rtx == 0) |
921b3427 | 3261 | to_rtx = expand_expr (to, NULL_RTX, VOIDmode, EXPAND_MEMORY_USE_WO); |
aaf87c45 | 3262 | |
fffa9c1d JW |
3263 | /* Handle calls that return values in multiple non-contiguous locations. |
3264 | The Irix 6 ABI has examples of this. */ | |
3265 | if (GET_CODE (to_rtx) == PARALLEL) | |
aac5cc16 RH |
3266 | emit_group_load (to_rtx, value, int_size_in_bytes (TREE_TYPE (from)), |
3267 | TYPE_ALIGN (TREE_TYPE (from)) / BITS_PER_UNIT); | |
fffa9c1d | 3268 | else if (GET_MODE (to_rtx) == BLKmode) |
db3ec607 | 3269 | emit_block_move (to_rtx, value, expr_size (from), |
ff9b5bd8 | 3270 | TYPE_ALIGN (TREE_TYPE (from)) / BITS_PER_UNIT); |
aaf87c45 JL |
3271 | else |
3272 | emit_move_insn (to_rtx, value); | |
cd1db108 RS |
3273 | preserve_temp_slots (to_rtx); |
3274 | free_temp_slots (); | |
0088fcb1 | 3275 | pop_temp_slots (); |
709f5be1 | 3276 | return want_value ? to_rtx : NULL_RTX; |
cd1db108 RS |
3277 | } |
3278 | ||
bbf6f052 RK |
3279 | /* Ordinary treatment. Expand TO to get a REG or MEM rtx. |
3280 | Don't re-expand if it was expanded already (in COMPONENT_REF case). */ | |
3281 | ||
3282 | if (to_rtx == 0) | |
41472af8 MM |
3283 | { |
3284 | to_rtx = expand_expr (to, NULL_RTX, VOIDmode, EXPAND_MEMORY_USE_WO); | |
3285 | if (GET_CODE (to_rtx) == MEM) | |
3286 | MEM_ALIAS_SET (to_rtx) = get_alias_set (to); | |
3287 | } | |
bbf6f052 | 3288 | |
86d38d25 RS |
3289 | /* Don't move directly into a return register. */ |
3290 | if (TREE_CODE (to) == RESULT_DECL && GET_CODE (to_rtx) == REG) | |
3291 | { | |
0088fcb1 RK |
3292 | rtx temp; |
3293 | ||
3294 | push_temp_slots (); | |
3295 | temp = expand_expr (from, 0, GET_MODE (to_rtx), 0); | |
86d38d25 RS |
3296 | emit_move_insn (to_rtx, temp); |
3297 | preserve_temp_slots (to_rtx); | |
3298 | free_temp_slots (); | |
0088fcb1 | 3299 | pop_temp_slots (); |
709f5be1 | 3300 | return want_value ? to_rtx : NULL_RTX; |
86d38d25 RS |
3301 | } |
3302 | ||
bbf6f052 RK |
3303 | /* In case we are returning the contents of an object which overlaps |
3304 | the place the value is being stored, use a safe function when copying | |
3305 | a value through a pointer into a structure value return block. */ | |
3306 | if (TREE_CODE (to) == RESULT_DECL && TREE_CODE (from) == INDIRECT_REF | |
3307 | && current_function_returns_struct | |
3308 | && !current_function_returns_pcc_struct) | |
3309 | { | |
0088fcb1 RK |
3310 | rtx from_rtx, size; |
3311 | ||
3312 | push_temp_slots (); | |
33a20d10 | 3313 | size = expr_size (from); |
921b3427 RK |
3314 | from_rtx = expand_expr (from, NULL_RTX, VOIDmode, |
3315 | EXPAND_MEMORY_USE_DONT); | |
3316 | ||
3317 | /* Copy the rights of the bitmap. */ | |
3318 | if (flag_check_memory_usage) | |
3319 | emit_library_call (chkr_copy_bitmap_libfunc, 1, VOIDmode, 3, | |
3320 | XEXP (to_rtx, 0), ptr_mode, | |
3321 | XEXP (from_rtx, 0), ptr_mode, | |
3322 | convert_to_mode (TYPE_MODE (sizetype), | |
3323 | size, TREE_UNSIGNED (sizetype)), | |
3324 | TYPE_MODE (sizetype)); | |
bbf6f052 RK |
3325 | |
3326 | #ifdef TARGET_MEM_FUNCTIONS | |
d562e42e | 3327 | emit_library_call (memcpy_libfunc, 0, |
bbf6f052 RK |
3328 | VOIDmode, 3, XEXP (to_rtx, 0), Pmode, |
3329 | XEXP (from_rtx, 0), Pmode, | |
0fa83258 RK |
3330 | convert_to_mode (TYPE_MODE (sizetype), |
3331 | size, TREE_UNSIGNED (sizetype)), | |
26ba80fc | 3332 | TYPE_MODE (sizetype)); |
bbf6f052 | 3333 | #else |
d562e42e | 3334 | emit_library_call (bcopy_libfunc, 0, |
bbf6f052 RK |
3335 | VOIDmode, 3, XEXP (from_rtx, 0), Pmode, |
3336 | XEXP (to_rtx, 0), Pmode, | |
3b6f75e2 JW |
3337 | convert_to_mode (TYPE_MODE (integer_type_node), |
3338 | size, TREE_UNSIGNED (integer_type_node)), | |
3339 | TYPE_MODE (integer_type_node)); | |
bbf6f052 RK |
3340 | #endif |
3341 | ||
3342 | preserve_temp_slots (to_rtx); | |
3343 | free_temp_slots (); | |
0088fcb1 | 3344 | pop_temp_slots (); |
709f5be1 | 3345 | return want_value ? to_rtx : NULL_RTX; |
bbf6f052 RK |
3346 | } |
3347 | ||
3348 | /* Compute FROM and store the value in the rtx we got. */ | |
3349 | ||
0088fcb1 | 3350 | push_temp_slots (); |
bbf6f052 RK |
3351 | result = store_expr (from, to_rtx, want_value); |
3352 | preserve_temp_slots (result); | |
3353 | free_temp_slots (); | |
0088fcb1 | 3354 | pop_temp_slots (); |
709f5be1 | 3355 | return want_value ? result : NULL_RTX; |
bbf6f052 RK |
3356 | } |
3357 | ||
3358 | /* Generate code for computing expression EXP, | |
3359 | and storing the value into TARGET. | |
bbf6f052 RK |
3360 | TARGET may contain a QUEUED rtx. |
3361 | ||
709f5be1 RS |
3362 | If WANT_VALUE is nonzero, return a copy of the value |
3363 | not in TARGET, so that we can be sure to use the proper | |
3364 | value in a containing expression even if TARGET has something | |
3365 | else stored in it. If possible, we copy the value through a pseudo | |
3366 | and return that pseudo. Or, if the value is constant, we try to | |
3367 | return the constant. In some cases, we return a pseudo | |
3368 | copied *from* TARGET. | |
3369 | ||
3370 | If the mode is BLKmode then we may return TARGET itself. | |
3371 | It turns out that in BLKmode it doesn't cause a problem. | |
3372 | because C has no operators that could combine two different | |
3373 | assignments into the same BLKmode object with different values | |
3374 | with no sequence point. Will other languages need this to | |
3375 | be more thorough? | |
3376 | ||
3377 | If WANT_VALUE is 0, we return NULL, to make sure | |
3378 | to catch quickly any cases where the caller uses the value | |
3379 | and fails to set WANT_VALUE. */ | |
bbf6f052 RK |
3380 | |
3381 | rtx | |
709f5be1 | 3382 | store_expr (exp, target, want_value) |
bbf6f052 RK |
3383 | register tree exp; |
3384 | register rtx target; | |
709f5be1 | 3385 | int want_value; |
bbf6f052 RK |
3386 | { |
3387 | register rtx temp; | |
3388 | int dont_return_target = 0; | |
3389 | ||
3390 | if (TREE_CODE (exp) == COMPOUND_EXPR) | |
3391 | { | |
3392 | /* Perform first part of compound expression, then assign from second | |
3393 | part. */ | |
3394 | expand_expr (TREE_OPERAND (exp, 0), const0_rtx, VOIDmode, 0); | |
3395 | emit_queue (); | |
709f5be1 | 3396 | return store_expr (TREE_OPERAND (exp, 1), target, want_value); |
bbf6f052 RK |
3397 | } |
3398 | else if (TREE_CODE (exp) == COND_EXPR && GET_MODE (target) == BLKmode) | |
3399 | { | |
3400 | /* For conditional expression, get safe form of the target. Then | |
3401 | test the condition, doing the appropriate assignment on either | |
3402 | side. This avoids the creation of unnecessary temporaries. | |
3403 | For non-BLKmode, it is more efficient not to do this. */ | |
3404 | ||
3405 | rtx lab1 = gen_label_rtx (), lab2 = gen_label_rtx (); | |
3406 | ||
3407 | emit_queue (); | |
3408 | target = protect_from_queue (target, 1); | |
3409 | ||
dabf8373 | 3410 | do_pending_stack_adjust (); |
bbf6f052 RK |
3411 | NO_DEFER_POP; |
3412 | jumpifnot (TREE_OPERAND (exp, 0), lab1); | |
956d6950 | 3413 | start_cleanup_deferral (); |
709f5be1 | 3414 | store_expr (TREE_OPERAND (exp, 1), target, 0); |
956d6950 | 3415 | end_cleanup_deferral (); |
bbf6f052 RK |
3416 | emit_queue (); |
3417 | emit_jump_insn (gen_jump (lab2)); | |
3418 | emit_barrier (); | |
3419 | emit_label (lab1); | |
956d6950 | 3420 | start_cleanup_deferral (); |
709f5be1 | 3421 | store_expr (TREE_OPERAND (exp, 2), target, 0); |
956d6950 | 3422 | end_cleanup_deferral (); |
bbf6f052 RK |
3423 | emit_queue (); |
3424 | emit_label (lab2); | |
3425 | OK_DEFER_POP; | |
a3a58acc | 3426 | |
709f5be1 | 3427 | return want_value ? target : NULL_RTX; |
bbf6f052 | 3428 | } |
709f5be1 | 3429 | else if (want_value && GET_CODE (target) == MEM && ! MEM_VOLATILE_P (target) |
bbf6f052 RK |
3430 | && GET_MODE (target) != BLKmode) |
3431 | /* If target is in memory and caller wants value in a register instead, | |
3432 | arrange that. Pass TARGET as target for expand_expr so that, | |
709f5be1 | 3433 | if EXP is another assignment, WANT_VALUE will be nonzero for it. |
c2e6aff6 RS |
3434 | We know expand_expr will not use the target in that case. |
3435 | Don't do this if TARGET is volatile because we are supposed | |
3436 | to write it and then read it. */ | |
bbf6f052 | 3437 | { |
906c4e36 | 3438 | temp = expand_expr (exp, cse_not_expected ? NULL_RTX : target, |
bbf6f052 RK |
3439 | GET_MODE (target), 0); |
3440 | if (GET_MODE (temp) != BLKmode && GET_MODE (temp) != VOIDmode) | |
3441 | temp = copy_to_reg (temp); | |
3442 | dont_return_target = 1; | |
3443 | } | |
3444 | else if (queued_subexp_p (target)) | |
709f5be1 RS |
3445 | /* If target contains a postincrement, let's not risk |
3446 | using it as the place to generate the rhs. */ | |
bbf6f052 RK |
3447 | { |
3448 | if (GET_MODE (target) != BLKmode && GET_MODE (target) != VOIDmode) | |
3449 | { | |
3450 | /* Expand EXP into a new pseudo. */ | |
3451 | temp = gen_reg_rtx (GET_MODE (target)); | |
3452 | temp = expand_expr (exp, temp, GET_MODE (target), 0); | |
3453 | } | |
3454 | else | |
906c4e36 | 3455 | temp = expand_expr (exp, NULL_RTX, GET_MODE (target), 0); |
709f5be1 RS |
3456 | |
3457 | /* If target is volatile, ANSI requires accessing the value | |
3458 | *from* the target, if it is accessed. So make that happen. | |
3459 | In no case return the target itself. */ | |
3460 | if (! MEM_VOLATILE_P (target) && want_value) | |
3461 | dont_return_target = 1; | |
bbf6f052 | 3462 | } |
1499e0a8 RK |
3463 | else if (GET_CODE (target) == SUBREG && SUBREG_PROMOTED_VAR_P (target)) |
3464 | /* If this is an scalar in a register that is stored in a wider mode | |
3465 | than the declared mode, compute the result into its declared mode | |
3466 | and then convert to the wider mode. Our value is the computed | |
3467 | expression. */ | |
3468 | { | |
5a32d038 | 3469 | /* If we don't want a value, we can do the conversion inside EXP, |
f635a84d RK |
3470 | which will often result in some optimizations. Do the conversion |
3471 | in two steps: first change the signedness, if needed, then | |
ab6c58f1 RK |
3472 | the extend. But don't do this if the type of EXP is a subtype |
3473 | of something else since then the conversion might involve | |
3474 | more than just converting modes. */ | |
3475 | if (! want_value && INTEGRAL_TYPE_P (TREE_TYPE (exp)) | |
3476 | && TREE_TYPE (TREE_TYPE (exp)) == 0) | |
f635a84d RK |
3477 | { |
3478 | if (TREE_UNSIGNED (TREE_TYPE (exp)) | |
3479 | != SUBREG_PROMOTED_UNSIGNED_P (target)) | |
3480 | exp | |
3481 | = convert | |
3482 | (signed_or_unsigned_type (SUBREG_PROMOTED_UNSIGNED_P (target), | |
3483 | TREE_TYPE (exp)), | |
3484 | exp); | |
3485 | ||
3486 | exp = convert (type_for_mode (GET_MODE (SUBREG_REG (target)), | |
3487 | SUBREG_PROMOTED_UNSIGNED_P (target)), | |
3488 | exp); | |
3489 | } | |
5a32d038 | 3490 | |
1499e0a8 | 3491 | temp = expand_expr (exp, NULL_RTX, VOIDmode, 0); |
b258707c | 3492 | |
766f36c7 | 3493 | /* If TEMP is a volatile MEM and we want a result value, make |
f29369b9 RK |
3494 | the access now so it gets done only once. Likewise if |
3495 | it contains TARGET. */ | |
3496 | if (GET_CODE (temp) == MEM && want_value | |
3497 | && (MEM_VOLATILE_P (temp) | |
3498 | || reg_mentioned_p (SUBREG_REG (target), XEXP (temp, 0)))) | |
766f36c7 RK |
3499 | temp = copy_to_reg (temp); |
3500 | ||
b258707c RS |
3501 | /* If TEMP is a VOIDmode constant, use convert_modes to make |
3502 | sure that we properly convert it. */ | |
3503 | if (CONSTANT_P (temp) && GET_MODE (temp) == VOIDmode) | |
3504 | temp = convert_modes (GET_MODE (SUBREG_REG (target)), | |
3505 | TYPE_MODE (TREE_TYPE (exp)), temp, | |
3506 | SUBREG_PROMOTED_UNSIGNED_P (target)); | |
3507 | ||
1499e0a8 RK |
3508 | convert_move (SUBREG_REG (target), temp, |
3509 | SUBREG_PROMOTED_UNSIGNED_P (target)); | |
709f5be1 | 3510 | return want_value ? temp : NULL_RTX; |
1499e0a8 | 3511 | } |
bbf6f052 RK |
3512 | else |
3513 | { | |
3514 | temp = expand_expr (exp, target, GET_MODE (target), 0); | |
766f36c7 | 3515 | /* Return TARGET if it's a specified hardware register. |
709f5be1 RS |
3516 | If TARGET is a volatile mem ref, either return TARGET |
3517 | or return a reg copied *from* TARGET; ANSI requires this. | |
3518 | ||
3519 | Otherwise, if TEMP is not TARGET, return TEMP | |
3520 | if it is constant (for efficiency), | |
3521 | or if we really want the correct value. */ | |
bbf6f052 RK |
3522 | if (!(target && GET_CODE (target) == REG |
3523 | && REGNO (target) < FIRST_PSEUDO_REGISTER) | |
709f5be1 | 3524 | && !(GET_CODE (target) == MEM && MEM_VOLATILE_P (target)) |
effbcc6a | 3525 | && ! rtx_equal_p (temp, target) |
709f5be1 | 3526 | && (CONSTANT_P (temp) || want_value)) |
bbf6f052 RK |
3527 | dont_return_target = 1; |
3528 | } | |
3529 | ||
b258707c RS |
3530 | /* If TEMP is a VOIDmode constant and the mode of the type of EXP is not |
3531 | the same as that of TARGET, adjust the constant. This is needed, for | |
3532 | example, in case it is a CONST_DOUBLE and we want only a word-sized | |
3533 | value. */ | |
3534 | if (CONSTANT_P (temp) && GET_MODE (temp) == VOIDmode | |
c1da1f33 | 3535 | && TREE_CODE (exp) != ERROR_MARK |
b258707c RS |
3536 | && GET_MODE (target) != TYPE_MODE (TREE_TYPE (exp))) |
3537 | temp = convert_modes (GET_MODE (target), TYPE_MODE (TREE_TYPE (exp)), | |
3538 | temp, TREE_UNSIGNED (TREE_TYPE (exp))); | |
3539 | ||
921b3427 RK |
3540 | if (flag_check_memory_usage |
3541 | && GET_CODE (target) == MEM | |
3542 | && AGGREGATE_TYPE_P (TREE_TYPE (exp))) | |
3543 | { | |
3544 | if (GET_CODE (temp) == MEM) | |
3545 | emit_library_call (chkr_copy_bitmap_libfunc, 1, VOIDmode, 3, | |
3546 | XEXP (target, 0), ptr_mode, | |
3547 | XEXP (temp, 0), ptr_mode, | |
3548 | expr_size (exp), TYPE_MODE (sizetype)); | |
3549 | else | |
3550 | emit_library_call (chkr_check_addr_libfunc, 1, VOIDmode, 3, | |
3551 | XEXP (target, 0), ptr_mode, | |
3552 | expr_size (exp), TYPE_MODE (sizetype), | |
956d6950 JL |
3553 | GEN_INT (MEMORY_USE_WO), |
3554 | TYPE_MODE (integer_type_node)); | |
921b3427 RK |
3555 | } |
3556 | ||
bbf6f052 RK |
3557 | /* If value was not generated in the target, store it there. |
3558 | Convert the value to TARGET's type first if nec. */ | |
3559 | ||
6036acbb R |
3560 | if ((! rtx_equal_p (temp, target) |
3561 | || side_effects_p (temp) | |
3562 | || side_effects_p (target)) | |
3563 | && TREE_CODE (exp) != ERROR_MARK) | |
bbf6f052 RK |
3564 | { |
3565 | target = protect_from_queue (target, 1); | |
3566 | if (GET_MODE (temp) != GET_MODE (target) | |
f0348c25 | 3567 | && GET_MODE (temp) != VOIDmode) |
bbf6f052 RK |
3568 | { |
3569 | int unsignedp = TREE_UNSIGNED (TREE_TYPE (exp)); | |
3570 | if (dont_return_target) | |
3571 | { | |
3572 | /* In this case, we will return TEMP, | |
3573 | so make sure it has the proper mode. | |
3574 | But don't forget to store the value into TARGET. */ | |
3575 | temp = convert_to_mode (GET_MODE (target), temp, unsignedp); | |
3576 | emit_move_insn (target, temp); | |
3577 | } | |
3578 | else | |
3579 | convert_move (target, temp, unsignedp); | |
3580 | } | |
3581 | ||
3582 | else if (GET_MODE (temp) == BLKmode && TREE_CODE (exp) == STRING_CST) | |
3583 | { | |
3584 | /* Handle copying a string constant into an array. | |
3585 | The string constant may be shorter than the array. | |
3586 | So copy just the string's actual length, and clear the rest. */ | |
3587 | rtx size; | |
22619c3f | 3588 | rtx addr; |
bbf6f052 | 3589 | |
e87b4f3f RS |
3590 | /* Get the size of the data type of the string, |
3591 | which is actually the size of the target. */ | |
3592 | size = expr_size (exp); | |
3593 | if (GET_CODE (size) == CONST_INT | |
3594 | && INTVAL (size) < TREE_STRING_LENGTH (exp)) | |
3595 | emit_block_move (target, temp, size, | |
3596 | TYPE_ALIGN (TREE_TYPE (exp)) / BITS_PER_UNIT); | |
3597 | else | |
bbf6f052 | 3598 | { |
e87b4f3f RS |
3599 | /* Compute the size of the data to copy from the string. */ |
3600 | tree copy_size | |
c03b7665 | 3601 | = size_binop (MIN_EXPR, |
b50d17a1 | 3602 | make_tree (sizetype, size), |
c03b7665 RK |
3603 | convert (sizetype, |
3604 | build_int_2 (TREE_STRING_LENGTH (exp), 0))); | |
906c4e36 RK |
3605 | rtx copy_size_rtx = expand_expr (copy_size, NULL_RTX, |
3606 | VOIDmode, 0); | |
e87b4f3f RS |
3607 | rtx label = 0; |
3608 | ||
3609 | /* Copy that much. */ | |
3610 | emit_block_move (target, temp, copy_size_rtx, | |
3611 | TYPE_ALIGN (TREE_TYPE (exp)) / BITS_PER_UNIT); | |
3612 | ||
88f63c77 RK |
3613 | /* Figure out how much is left in TARGET that we have to clear. |
3614 | Do all calculations in ptr_mode. */ | |
3615 | ||
3616 | addr = XEXP (target, 0); | |
3617 | addr = convert_modes (ptr_mode, Pmode, addr, 1); | |
3618 | ||
e87b4f3f RS |
3619 | if (GET_CODE (copy_size_rtx) == CONST_INT) |
3620 | { | |
88f63c77 | 3621 | addr = plus_constant (addr, TREE_STRING_LENGTH (exp)); |
22619c3f | 3622 | size = plus_constant (size, - TREE_STRING_LENGTH (exp)); |
e87b4f3f RS |
3623 | } |
3624 | else | |
3625 | { | |
88f63c77 RK |
3626 | addr = force_reg (ptr_mode, addr); |
3627 | addr = expand_binop (ptr_mode, add_optab, addr, | |
906c4e36 RK |
3628 | copy_size_rtx, NULL_RTX, 0, |
3629 | OPTAB_LIB_WIDEN); | |
e87b4f3f | 3630 | |
88f63c77 | 3631 | size = expand_binop (ptr_mode, sub_optab, size, |
906c4e36 RK |
3632 | copy_size_rtx, NULL_RTX, 0, |
3633 | OPTAB_LIB_WIDEN); | |
e87b4f3f | 3634 | |
906c4e36 | 3635 | emit_cmp_insn (size, const0_rtx, LT, NULL_RTX, |
e87b4f3f RS |
3636 | GET_MODE (size), 0, 0); |
3637 | label = gen_label_rtx (); | |
3638 | emit_jump_insn (gen_blt (label)); | |
3639 | } | |
3640 | ||
3641 | if (size != const0_rtx) | |
3642 | { | |
921b3427 RK |
3643 | /* Be sure we can write on ADDR. */ |
3644 | if (flag_check_memory_usage) | |
3645 | emit_library_call (chkr_check_addr_libfunc, 1, VOIDmode, 3, | |
3646 | addr, ptr_mode, | |
3647 | size, TYPE_MODE (sizetype), | |
956d6950 JL |
3648 | GEN_INT (MEMORY_USE_WO), |
3649 | TYPE_MODE (integer_type_node)); | |
bbf6f052 | 3650 | #ifdef TARGET_MEM_FUNCTIONS |
3b6f75e2 | 3651 | emit_library_call (memset_libfunc, 0, VOIDmode, 3, |
86242483 | 3652 | addr, ptr_mode, |
3b6f75e2 JW |
3653 | const0_rtx, TYPE_MODE (integer_type_node), |
3654 | convert_to_mode (TYPE_MODE (sizetype), | |
3655 | size, | |
3656 | TREE_UNSIGNED (sizetype)), | |
3657 | TYPE_MODE (sizetype)); | |
bbf6f052 | 3658 | #else |
d562e42e | 3659 | emit_library_call (bzero_libfunc, 0, VOIDmode, 2, |
86242483 | 3660 | addr, ptr_mode, |
3b6f75e2 JW |
3661 | convert_to_mode (TYPE_MODE (integer_type_node), |
3662 | size, | |
3663 | TREE_UNSIGNED (integer_type_node)), | |
3664 | TYPE_MODE (integer_type_node)); | |
bbf6f052 | 3665 | #endif |
e87b4f3f | 3666 | } |
22619c3f | 3667 | |
e87b4f3f RS |
3668 | if (label) |
3669 | emit_label (label); | |
bbf6f052 RK |
3670 | } |
3671 | } | |
fffa9c1d JW |
3672 | /* Handle calls that return values in multiple non-contiguous locations. |
3673 | The Irix 6 ABI has examples of this. */ | |
3674 | else if (GET_CODE (target) == PARALLEL) | |
aac5cc16 RH |
3675 | emit_group_load (target, temp, int_size_in_bytes (TREE_TYPE (exp)), |
3676 | TYPE_ALIGN (TREE_TYPE (exp)) / BITS_PER_UNIT); | |
bbf6f052 RK |
3677 | else if (GET_MODE (temp) == BLKmode) |
3678 | emit_block_move (target, temp, expr_size (exp), | |
3679 | TYPE_ALIGN (TREE_TYPE (exp)) / BITS_PER_UNIT); | |
3680 | else | |
3681 | emit_move_insn (target, temp); | |
3682 | } | |
709f5be1 | 3683 | |
766f36c7 RK |
3684 | /* If we don't want a value, return NULL_RTX. */ |
3685 | if (! want_value) | |
3686 | return NULL_RTX; | |
3687 | ||
3688 | /* If we are supposed to return TEMP, do so as long as it isn't a MEM. | |
3689 | ??? The latter test doesn't seem to make sense. */ | |
3690 | else if (dont_return_target && GET_CODE (temp) != MEM) | |
bbf6f052 | 3691 | return temp; |
766f36c7 RK |
3692 | |
3693 | /* Return TARGET itself if it is a hard register. */ | |
3694 | else if (want_value && GET_MODE (target) != BLKmode | |
3695 | && ! (GET_CODE (target) == REG | |
3696 | && REGNO (target) < FIRST_PSEUDO_REGISTER)) | |
709f5be1 | 3697 | return copy_to_reg (target); |
766f36c7 RK |
3698 | |
3699 | else | |
709f5be1 | 3700 | return target; |
bbf6f052 RK |
3701 | } |
3702 | \f | |
9de08200 RK |
3703 | /* Return 1 if EXP just contains zeros. */ |
3704 | ||
3705 | static int | |
3706 | is_zeros_p (exp) | |
3707 | tree exp; | |
3708 | { | |
3709 | tree elt; | |
3710 | ||
3711 | switch (TREE_CODE (exp)) | |
3712 | { | |
3713 | case CONVERT_EXPR: | |
3714 | case NOP_EXPR: | |
3715 | case NON_LVALUE_EXPR: | |
3716 | return is_zeros_p (TREE_OPERAND (exp, 0)); | |
3717 | ||
3718 | case INTEGER_CST: | |
3719 | return TREE_INT_CST_LOW (exp) == 0 && TREE_INT_CST_HIGH (exp) == 0; | |
3720 | ||
3721 | case COMPLEX_CST: | |
3722 | return | |
3723 | is_zeros_p (TREE_REALPART (exp)) && is_zeros_p (TREE_IMAGPART (exp)); | |
3724 | ||
3725 | case REAL_CST: | |
41c9120b | 3726 | return REAL_VALUES_IDENTICAL (TREE_REAL_CST (exp), dconst0); |
9de08200 RK |
3727 | |
3728 | case CONSTRUCTOR: | |
e1a43f73 PB |
3729 | if (TREE_TYPE (exp) && TREE_CODE (TREE_TYPE (exp)) == SET_TYPE) |
3730 | return CONSTRUCTOR_ELTS (exp) == NULL_TREE; | |
9de08200 RK |
3731 | for (elt = CONSTRUCTOR_ELTS (exp); elt; elt = TREE_CHAIN (elt)) |
3732 | if (! is_zeros_p (TREE_VALUE (elt))) | |
3733 | return 0; | |
3734 | ||
3735 | return 1; | |
e9a25f70 JL |
3736 | |
3737 | default: | |
3738 | return 0; | |
9de08200 | 3739 | } |
9de08200 RK |
3740 | } |
3741 | ||
3742 | /* Return 1 if EXP contains mostly (3/4) zeros. */ | |
3743 | ||
3744 | static int | |
3745 | mostly_zeros_p (exp) | |
3746 | tree exp; | |
3747 | { | |
9de08200 RK |
3748 | if (TREE_CODE (exp) == CONSTRUCTOR) |
3749 | { | |
e1a43f73 PB |
3750 | int elts = 0, zeros = 0; |
3751 | tree elt = CONSTRUCTOR_ELTS (exp); | |
3752 | if (TREE_TYPE (exp) && TREE_CODE (TREE_TYPE (exp)) == SET_TYPE) | |
3753 | { | |
3754 | /* If there are no ranges of true bits, it is all zero. */ | |
3755 | return elt == NULL_TREE; | |
3756 | } | |
3757 | for (; elt; elt = TREE_CHAIN (elt)) | |
3758 | { | |
3759 | /* We do not handle the case where the index is a RANGE_EXPR, | |
3760 | so the statistic will be somewhat inaccurate. | |
3761 | We do make a more accurate count in store_constructor itself, | |
3762 | so since this function is only used for nested array elements, | |
0f41302f | 3763 | this should be close enough. */ |
e1a43f73 PB |
3764 | if (mostly_zeros_p (TREE_VALUE (elt))) |
3765 | zeros++; | |
3766 | elts++; | |
3767 | } | |
9de08200 RK |
3768 | |
3769 | return 4 * zeros >= 3 * elts; | |
3770 | } | |
3771 | ||
3772 | return is_zeros_p (exp); | |
3773 | } | |
3774 | \f | |
e1a43f73 PB |
3775 | /* Helper function for store_constructor. |
3776 | TARGET, BITSIZE, BITPOS, MODE, EXP are as for store_field. | |
3777 | TYPE is the type of the CONSTRUCTOR, not the element type. | |
23ccec44 JW |
3778 | CLEARED is as for store_constructor. |
3779 | ||
3780 | This provides a recursive shortcut back to store_constructor when it isn't | |
3781 | necessary to go through store_field. This is so that we can pass through | |
3782 | the cleared field to let store_constructor know that we may not have to | |
3783 | clear a substructure if the outer structure has already been cleared. */ | |
e1a43f73 PB |
3784 | |
3785 | static void | |
3786 | store_constructor_field (target, bitsize, bitpos, | |
3787 | mode, exp, type, cleared) | |
3788 | rtx target; | |
3789 | int bitsize, bitpos; | |
3790 | enum machine_mode mode; | |
3791 | tree exp, type; | |
3792 | int cleared; | |
3793 | { | |
3794 | if (TREE_CODE (exp) == CONSTRUCTOR | |
23ccec44 JW |
3795 | && bitpos % BITS_PER_UNIT == 0 |
3796 | /* If we have a non-zero bitpos for a register target, then we just | |
3797 | let store_field do the bitfield handling. This is unlikely to | |
3798 | generate unnecessary clear instructions anyways. */ | |
3799 | && (bitpos == 0 || GET_CODE (target) == MEM)) | |
e1a43f73 | 3800 | { |
126e5b0d JW |
3801 | if (bitpos != 0) |
3802 | target = change_address (target, VOIDmode, | |
3803 | plus_constant (XEXP (target, 0), | |
3804 | bitpos / BITS_PER_UNIT)); | |
3805 | store_constructor (exp, target, cleared); | |
e1a43f73 PB |
3806 | } |
3807 | else | |
3808 | store_field (target, bitsize, bitpos, mode, exp, | |
3809 | VOIDmode, 0, TYPE_ALIGN (type) / BITS_PER_UNIT, | |
ece32014 | 3810 | int_size_in_bytes (type), 0); |
e1a43f73 PB |
3811 | } |
3812 | ||
bbf6f052 | 3813 | /* Store the value of constructor EXP into the rtx TARGET. |
e1a43f73 | 3814 | TARGET is either a REG or a MEM. |
0f41302f | 3815 | CLEARED is true if TARGET is known to have been zero'd. */ |
bbf6f052 RK |
3816 | |
3817 | static void | |
e1a43f73 | 3818 | store_constructor (exp, target, cleared) |
bbf6f052 RK |
3819 | tree exp; |
3820 | rtx target; | |
e1a43f73 | 3821 | int cleared; |
bbf6f052 | 3822 | { |
4af3895e | 3823 | tree type = TREE_TYPE (exp); |
34c73909 | 3824 | rtx exp_size = expr_size (exp); |
4af3895e | 3825 | |
bbf6f052 RK |
3826 | /* We know our target cannot conflict, since safe_from_p has been called. */ |
3827 | #if 0 | |
3828 | /* Don't try copying piece by piece into a hard register | |
3829 | since that is vulnerable to being clobbered by EXP. | |
3830 | Instead, construct in a pseudo register and then copy it all. */ | |
3831 | if (GET_CODE (target) == REG && REGNO (target) < FIRST_PSEUDO_REGISTER) | |
3832 | { | |
3833 | rtx temp = gen_reg_rtx (GET_MODE (target)); | |
e1a43f73 | 3834 | store_constructor (exp, temp, 0); |
bbf6f052 RK |
3835 | emit_move_insn (target, temp); |
3836 | return; | |
3837 | } | |
3838 | #endif | |
3839 | ||
e44842fe RK |
3840 | if (TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE |
3841 | || TREE_CODE (type) == QUAL_UNION_TYPE) | |
bbf6f052 RK |
3842 | { |
3843 | register tree elt; | |
3844 | ||
4af3895e | 3845 | /* Inform later passes that the whole union value is dead. */ |
e44842fe RK |
3846 | if (TREE_CODE (type) == UNION_TYPE |
3847 | || TREE_CODE (type) == QUAL_UNION_TYPE) | |
38a448ca | 3848 | emit_insn (gen_rtx_CLOBBER (VOIDmode, target)); |
4af3895e JVA |
3849 | |
3850 | /* If we are building a static constructor into a register, | |
3851 | set the initial value as zero so we can fold the value into | |
67225c15 RK |
3852 | a constant. But if more than one register is involved, |
3853 | this probably loses. */ | |
3854 | else if (GET_CODE (target) == REG && TREE_STATIC (exp) | |
3855 | && GET_MODE_SIZE (GET_MODE (target)) <= UNITS_PER_WORD) | |
9de08200 RK |
3856 | { |
3857 | if (! cleared) | |
e9a25f70 | 3858 | emit_move_insn (target, CONST0_RTX (GET_MODE (target))); |
4af3895e | 3859 | |
9de08200 RK |
3860 | cleared = 1; |
3861 | } | |
3862 | ||
3863 | /* If the constructor has fewer fields than the structure | |
3864 | or if we are initializing the structure to mostly zeros, | |
bbf6f052 | 3865 | clear the whole structure first. */ |
9de08200 RK |
3866 | else if ((list_length (CONSTRUCTOR_ELTS (exp)) |
3867 | != list_length (TYPE_FIELDS (type))) | |
3868 | || mostly_zeros_p (exp)) | |
3869 | { | |
3870 | if (! cleared) | |
3871 | clear_storage (target, expr_size (exp), | |
3872 | TYPE_ALIGN (type) / BITS_PER_UNIT); | |
3873 | ||
3874 | cleared = 1; | |
3875 | } | |
bbf6f052 RK |
3876 | else |
3877 | /* Inform later passes that the old value is dead. */ | |
38a448ca | 3878 | emit_insn (gen_rtx_CLOBBER (VOIDmode, target)); |
bbf6f052 RK |
3879 | |
3880 | /* Store each element of the constructor into | |
3881 | the corresponding field of TARGET. */ | |
3882 | ||
3883 | for (elt = CONSTRUCTOR_ELTS (exp); elt; elt = TREE_CHAIN (elt)) | |
3884 | { | |
3885 | register tree field = TREE_PURPOSE (elt); | |
34c73909 | 3886 | tree value = TREE_VALUE (elt); |
bbf6f052 RK |
3887 | register enum machine_mode mode; |
3888 | int bitsize; | |
b50d17a1 | 3889 | int bitpos = 0; |
bbf6f052 | 3890 | int unsignedp; |
b50d17a1 RK |
3891 | tree pos, constant = 0, offset = 0; |
3892 | rtx to_rtx = target; | |
bbf6f052 | 3893 | |
f32fd778 RS |
3894 | /* Just ignore missing fields. |
3895 | We cleared the whole structure, above, | |
3896 | if any fields are missing. */ | |
3897 | if (field == 0) | |
3898 | continue; | |
3899 | ||
e1a43f73 PB |
3900 | if (cleared && is_zeros_p (TREE_VALUE (elt))) |
3901 | continue; | |
9de08200 | 3902 | |
bbf6f052 RK |
3903 | bitsize = TREE_INT_CST_LOW (DECL_SIZE (field)); |
3904 | unsignedp = TREE_UNSIGNED (field); | |
3905 | mode = DECL_MODE (field); | |
3906 | if (DECL_BIT_FIELD (field)) | |
3907 | mode = VOIDmode; | |
3908 | ||
b50d17a1 RK |
3909 | pos = DECL_FIELD_BITPOS (field); |
3910 | if (TREE_CODE (pos) == INTEGER_CST) | |
3911 | constant = pos; | |
3912 | else if (TREE_CODE (pos) == PLUS_EXPR | |
3913 | && TREE_CODE (TREE_OPERAND (pos, 1)) == INTEGER_CST) | |
3914 | constant = TREE_OPERAND (pos, 1), offset = TREE_OPERAND (pos, 0); | |
3915 | else | |
3916 | offset = pos; | |
3917 | ||
3918 | if (constant) | |
cd11b87e | 3919 | bitpos = TREE_INT_CST_LOW (constant); |
b50d17a1 RK |
3920 | |
3921 | if (offset) | |
3922 | { | |
3923 | rtx offset_rtx; | |
3924 | ||
3925 | if (contains_placeholder_p (offset)) | |
3926 | offset = build (WITH_RECORD_EXPR, sizetype, | |
956d6950 | 3927 | offset, make_tree (TREE_TYPE (exp), target)); |
bbf6f052 | 3928 | |
b50d17a1 RK |
3929 | offset = size_binop (FLOOR_DIV_EXPR, offset, |
3930 | size_int (BITS_PER_UNIT)); | |
bbf6f052 | 3931 | |
b50d17a1 RK |
3932 | offset_rtx = expand_expr (offset, NULL_RTX, VOIDmode, 0); |
3933 | if (GET_CODE (to_rtx) != MEM) | |
3934 | abort (); | |
3935 | ||
bd070e1a RH |
3936 | if (GET_MODE (offset_rtx) != ptr_mode) |
3937 | { | |
3938 | #ifdef POINTERS_EXTEND_UNSIGNED | |
822a3443 | 3939 | offset_rtx = convert_memory_address (ptr_mode, offset_rtx); |
bd070e1a RH |
3940 | #else |
3941 | offset_rtx = convert_to_mode (ptr_mode, offset_rtx, 0); | |
3942 | #endif | |
3943 | } | |
3944 | ||
b50d17a1 RK |
3945 | to_rtx |
3946 | = change_address (to_rtx, VOIDmode, | |
38a448ca | 3947 | gen_rtx_PLUS (ptr_mode, XEXP (to_rtx, 0), |
88f63c77 | 3948 | force_reg (ptr_mode, offset_rtx))); |
b50d17a1 | 3949 | } |
cf04eb80 RK |
3950 | if (TREE_READONLY (field)) |
3951 | { | |
9151b3bf | 3952 | if (GET_CODE (to_rtx) == MEM) |
effbcc6a RK |
3953 | to_rtx = copy_rtx (to_rtx); |
3954 | ||
cf04eb80 RK |
3955 | RTX_UNCHANGING_P (to_rtx) = 1; |
3956 | } | |
3957 | ||
34c73909 R |
3958 | #ifdef WORD_REGISTER_OPERATIONS |
3959 | /* If this initializes a field that is smaller than a word, at the | |
3960 | start of a word, try to widen it to a full word. | |
3961 | This special case allows us to output C++ member function | |
3962 | initializations in a form that the optimizers can understand. */ | |
3963 | if (constant | |
3964 | && GET_CODE (target) == REG | |
3965 | && bitsize < BITS_PER_WORD | |
3966 | && bitpos % BITS_PER_WORD == 0 | |
3967 | && GET_MODE_CLASS (mode) == MODE_INT | |
3968 | && TREE_CODE (value) == INTEGER_CST | |
3969 | && GET_CODE (exp_size) == CONST_INT | |
3970 | && bitpos + BITS_PER_WORD <= INTVAL (exp_size) * BITS_PER_UNIT) | |
3971 | { | |
3972 | tree type = TREE_TYPE (value); | |
3973 | if (TYPE_PRECISION (type) < BITS_PER_WORD) | |
3974 | { | |
3975 | type = type_for_size (BITS_PER_WORD, TREE_UNSIGNED (type)); | |
3976 | value = convert (type, value); | |
3977 | } | |
3978 | if (BYTES_BIG_ENDIAN) | |
3979 | value | |
3980 | = fold (build (LSHIFT_EXPR, type, value, | |
3981 | build_int_2 (BITS_PER_WORD - bitsize, 0))); | |
3982 | bitsize = BITS_PER_WORD; | |
3983 | mode = word_mode; | |
3984 | } | |
3985 | #endif | |
e1a43f73 | 3986 | store_constructor_field (to_rtx, bitsize, bitpos, |
34c73909 | 3987 | mode, value, type, cleared); |
bbf6f052 RK |
3988 | } |
3989 | } | |
4af3895e | 3990 | else if (TREE_CODE (type) == ARRAY_TYPE) |
bbf6f052 RK |
3991 | { |
3992 | register tree elt; | |
3993 | register int i; | |
e1a43f73 | 3994 | int need_to_clear; |
4af3895e | 3995 | tree domain = TYPE_DOMAIN (type); |
906c4e36 RK |
3996 | HOST_WIDE_INT minelt = TREE_INT_CST_LOW (TYPE_MIN_VALUE (domain)); |
3997 | HOST_WIDE_INT maxelt = TREE_INT_CST_LOW (TYPE_MAX_VALUE (domain)); | |
4af3895e | 3998 | tree elttype = TREE_TYPE (type); |
bbf6f052 | 3999 | |
e1a43f73 | 4000 | /* If the constructor has fewer elements than the array, |
38e01259 | 4001 | clear the whole array first. Similarly if this is |
e1a43f73 PB |
4002 | static constructor of a non-BLKmode object. */ |
4003 | if (cleared || (GET_CODE (target) == REG && TREE_STATIC (exp))) | |
4004 | need_to_clear = 1; | |
4005 | else | |
4006 | { | |
4007 | HOST_WIDE_INT count = 0, zero_count = 0; | |
4008 | need_to_clear = 0; | |
4009 | /* This loop is a more accurate version of the loop in | |
4010 | mostly_zeros_p (it handles RANGE_EXPR in an index). | |
4011 | It is also needed to check for missing elements. */ | |
4012 | for (elt = CONSTRUCTOR_ELTS (exp); | |
4013 | elt != NULL_TREE; | |
df0faff1 | 4014 | elt = TREE_CHAIN (elt)) |
e1a43f73 PB |
4015 | { |
4016 | tree index = TREE_PURPOSE (elt); | |
4017 | HOST_WIDE_INT this_node_count; | |
4018 | if (index != NULL_TREE && TREE_CODE (index) == RANGE_EXPR) | |
4019 | { | |
4020 | tree lo_index = TREE_OPERAND (index, 0); | |
4021 | tree hi_index = TREE_OPERAND (index, 1); | |
4022 | if (TREE_CODE (lo_index) != INTEGER_CST | |
4023 | || TREE_CODE (hi_index) != INTEGER_CST) | |
4024 | { | |
4025 | need_to_clear = 1; | |
4026 | break; | |
4027 | } | |
4028 | this_node_count = TREE_INT_CST_LOW (hi_index) | |
4029 | - TREE_INT_CST_LOW (lo_index) + 1; | |
4030 | } | |
4031 | else | |
4032 | this_node_count = 1; | |
4033 | count += this_node_count; | |
4034 | if (mostly_zeros_p (TREE_VALUE (elt))) | |
4035 | zero_count += this_node_count; | |
4036 | } | |
8e958f70 | 4037 | /* Clear the entire array first if there are any missing elements, |
0f41302f | 4038 | or if the incidence of zero elements is >= 75%. */ |
8e958f70 PB |
4039 | if (count < maxelt - minelt + 1 |
4040 | || 4 * zero_count >= 3 * count) | |
e1a43f73 PB |
4041 | need_to_clear = 1; |
4042 | } | |
4043 | if (need_to_clear) | |
9de08200 RK |
4044 | { |
4045 | if (! cleared) | |
4046 | clear_storage (target, expr_size (exp), | |
4047 | TYPE_ALIGN (type) / BITS_PER_UNIT); | |
9de08200 RK |
4048 | cleared = 1; |
4049 | } | |
bbf6f052 RK |
4050 | else |
4051 | /* Inform later passes that the old value is dead. */ | |
38a448ca | 4052 | emit_insn (gen_rtx_CLOBBER (VOIDmode, target)); |
bbf6f052 RK |
4053 | |
4054 | /* Store each element of the constructor into | |
4055 | the corresponding element of TARGET, determined | |
4056 | by counting the elements. */ | |
4057 | for (elt = CONSTRUCTOR_ELTS (exp), i = 0; | |
4058 | elt; | |
4059 | elt = TREE_CHAIN (elt), i++) | |
4060 | { | |
4061 | register enum machine_mode mode; | |
4062 | int bitsize; | |
4063 | int bitpos; | |
4064 | int unsignedp; | |
e1a43f73 | 4065 | tree value = TREE_VALUE (elt); |
03dc44a6 RS |
4066 | tree index = TREE_PURPOSE (elt); |
4067 | rtx xtarget = target; | |
bbf6f052 | 4068 | |
e1a43f73 PB |
4069 | if (cleared && is_zeros_p (value)) |
4070 | continue; | |
9de08200 | 4071 | |
bbf6f052 RK |
4072 | mode = TYPE_MODE (elttype); |
4073 | bitsize = GET_MODE_BITSIZE (mode); | |
4074 | unsignedp = TREE_UNSIGNED (elttype); | |
4075 | ||
e1a43f73 PB |
4076 | if (index != NULL_TREE && TREE_CODE (index) == RANGE_EXPR) |
4077 | { | |
4078 | tree lo_index = TREE_OPERAND (index, 0); | |
4079 | tree hi_index = TREE_OPERAND (index, 1); | |
4080 | rtx index_r, pos_rtx, addr, hi_r, loop_top, loop_end; | |
4081 | struct nesting *loop; | |
05c0b405 PB |
4082 | HOST_WIDE_INT lo, hi, count; |
4083 | tree position; | |
e1a43f73 | 4084 | |
0f41302f | 4085 | /* If the range is constant and "small", unroll the loop. */ |
e1a43f73 | 4086 | if (TREE_CODE (lo_index) == INTEGER_CST |
05c0b405 PB |
4087 | && TREE_CODE (hi_index) == INTEGER_CST |
4088 | && (lo = TREE_INT_CST_LOW (lo_index), | |
4089 | hi = TREE_INT_CST_LOW (hi_index), | |
4090 | count = hi - lo + 1, | |
4091 | (GET_CODE (target) != MEM | |
4092 | || count <= 2 | |
4093 | || (TREE_CODE (TYPE_SIZE (elttype)) == INTEGER_CST | |
4094 | && TREE_INT_CST_LOW (TYPE_SIZE (elttype)) * count | |
4095 | <= 40 * 8)))) | |
e1a43f73 | 4096 | { |
05c0b405 PB |
4097 | lo -= minelt; hi -= minelt; |
4098 | for (; lo <= hi; lo++) | |
e1a43f73 | 4099 | { |
05c0b405 PB |
4100 | bitpos = lo * TREE_INT_CST_LOW (TYPE_SIZE (elttype)); |
4101 | store_constructor_field (target, bitsize, bitpos, | |
4102 | mode, value, type, cleared); | |
e1a43f73 PB |
4103 | } |
4104 | } | |
4105 | else | |
4106 | { | |
4107 | hi_r = expand_expr (hi_index, NULL_RTX, VOIDmode, 0); | |
4108 | loop_top = gen_label_rtx (); | |
4109 | loop_end = gen_label_rtx (); | |
4110 | ||
4111 | unsignedp = TREE_UNSIGNED (domain); | |
4112 | ||
4113 | index = build_decl (VAR_DECL, NULL_TREE, domain); | |
4114 | ||
4115 | DECL_RTL (index) = index_r | |
4116 | = gen_reg_rtx (promote_mode (domain, DECL_MODE (index), | |
4117 | &unsignedp, 0)); | |
4118 | ||
4119 | if (TREE_CODE (value) == SAVE_EXPR | |
4120 | && SAVE_EXPR_RTL (value) == 0) | |
4121 | { | |
0f41302f MS |
4122 | /* Make sure value gets expanded once before the |
4123 | loop. */ | |
e1a43f73 PB |
4124 | expand_expr (value, const0_rtx, VOIDmode, 0); |
4125 | emit_queue (); | |
4126 | } | |
4127 | store_expr (lo_index, index_r, 0); | |
4128 | loop = expand_start_loop (0); | |
4129 | ||
0f41302f | 4130 | /* Assign value to element index. */ |
e1a43f73 PB |
4131 | position = size_binop (EXACT_DIV_EXPR, TYPE_SIZE (elttype), |
4132 | size_int (BITS_PER_UNIT)); | |
4133 | position = size_binop (MULT_EXPR, | |
4134 | size_binop (MINUS_EXPR, index, | |
4135 | TYPE_MIN_VALUE (domain)), | |
4136 | position); | |
4137 | pos_rtx = expand_expr (position, 0, VOIDmode, 0); | |
38a448ca | 4138 | addr = gen_rtx_PLUS (Pmode, XEXP (target, 0), pos_rtx); |
e1a43f73 PB |
4139 | xtarget = change_address (target, mode, addr); |
4140 | if (TREE_CODE (value) == CONSTRUCTOR) | |
05c0b405 | 4141 | store_constructor (value, xtarget, cleared); |
e1a43f73 PB |
4142 | else |
4143 | store_expr (value, xtarget, 0); | |
4144 | ||
4145 | expand_exit_loop_if_false (loop, | |
4146 | build (LT_EXPR, integer_type_node, | |
4147 | index, hi_index)); | |
4148 | ||
4149 | expand_increment (build (PREINCREMENT_EXPR, | |
4150 | TREE_TYPE (index), | |
7b8b9722 | 4151 | index, integer_one_node), 0, 0); |
e1a43f73 PB |
4152 | expand_end_loop (); |
4153 | emit_label (loop_end); | |
4154 | ||
4155 | /* Needed by stupid register allocation. to extend the | |
4156 | lifetime of pseudo-regs used by target past the end | |
4157 | of the loop. */ | |
38a448ca | 4158 | emit_insn (gen_rtx_USE (GET_MODE (target), target)); |
e1a43f73 PB |
4159 | } |
4160 | } | |
4161 | else if ((index != 0 && TREE_CODE (index) != INTEGER_CST) | |
5b6c44ff | 4162 | || TREE_CODE (TYPE_SIZE (elttype)) != INTEGER_CST) |
03dc44a6 | 4163 | { |
e1a43f73 | 4164 | rtx pos_rtx, addr; |
03dc44a6 RS |
4165 | tree position; |
4166 | ||
5b6c44ff RK |
4167 | if (index == 0) |
4168 | index = size_int (i); | |
4169 | ||
e1a43f73 PB |
4170 | if (minelt) |
4171 | index = size_binop (MINUS_EXPR, index, | |
4172 | TYPE_MIN_VALUE (domain)); | |
5b6c44ff RK |
4173 | position = size_binop (EXACT_DIV_EXPR, TYPE_SIZE (elttype), |
4174 | size_int (BITS_PER_UNIT)); | |
4175 | position = size_binop (MULT_EXPR, index, position); | |
03dc44a6 | 4176 | pos_rtx = expand_expr (position, 0, VOIDmode, 0); |
38a448ca | 4177 | addr = gen_rtx_PLUS (Pmode, XEXP (target, 0), pos_rtx); |
03dc44a6 | 4178 | xtarget = change_address (target, mode, addr); |
e1a43f73 | 4179 | store_expr (value, xtarget, 0); |
03dc44a6 RS |
4180 | } |
4181 | else | |
4182 | { | |
4183 | if (index != 0) | |
7c314719 | 4184 | bitpos = ((TREE_INT_CST_LOW (index) - minelt) |
03dc44a6 RS |
4185 | * TREE_INT_CST_LOW (TYPE_SIZE (elttype))); |
4186 | else | |
4187 | bitpos = (i * TREE_INT_CST_LOW (TYPE_SIZE (elttype))); | |
e1a43f73 PB |
4188 | store_constructor_field (target, bitsize, bitpos, |
4189 | mode, value, type, cleared); | |
03dc44a6 | 4190 | } |
bbf6f052 RK |
4191 | } |
4192 | } | |
071a6595 PB |
4193 | /* set constructor assignments */ |
4194 | else if (TREE_CODE (type) == SET_TYPE) | |
4195 | { | |
e1a43f73 | 4196 | tree elt = CONSTRUCTOR_ELTS (exp); |
e1a43f73 | 4197 | int nbytes = int_size_in_bytes (type), nbits; |
071a6595 PB |
4198 | tree domain = TYPE_DOMAIN (type); |
4199 | tree domain_min, domain_max, bitlength; | |
4200 | ||
9faa82d8 | 4201 | /* The default implementation strategy is to extract the constant |
071a6595 PB |
4202 | parts of the constructor, use that to initialize the target, |
4203 | and then "or" in whatever non-constant ranges we need in addition. | |
4204 | ||
4205 | If a large set is all zero or all ones, it is | |
4206 | probably better to set it using memset (if available) or bzero. | |
4207 | Also, if a large set has just a single range, it may also be | |
4208 | better to first clear all the first clear the set (using | |
0f41302f | 4209 | bzero/memset), and set the bits we want. */ |
071a6595 | 4210 | |
0f41302f | 4211 | /* Check for all zeros. */ |
e1a43f73 | 4212 | if (elt == NULL_TREE) |
071a6595 | 4213 | { |
e1a43f73 PB |
4214 | if (!cleared) |
4215 | clear_storage (target, expr_size (exp), | |
4216 | TYPE_ALIGN (type) / BITS_PER_UNIT); | |
071a6595 PB |
4217 | return; |
4218 | } | |
4219 | ||
071a6595 PB |
4220 | domain_min = convert (sizetype, TYPE_MIN_VALUE (domain)); |
4221 | domain_max = convert (sizetype, TYPE_MAX_VALUE (domain)); | |
4222 | bitlength = size_binop (PLUS_EXPR, | |
4223 | size_binop (MINUS_EXPR, domain_max, domain_min), | |
4224 | size_one_node); | |
4225 | ||
e1a43f73 PB |
4226 | if (nbytes < 0 || TREE_CODE (bitlength) != INTEGER_CST) |
4227 | abort (); | |
4228 | nbits = TREE_INT_CST_LOW (bitlength); | |
4229 | ||
4230 | /* For "small" sets, or "medium-sized" (up to 32 bytes) sets that | |
4231 | are "complicated" (more than one range), initialize (the | |
4232 | constant parts) by copying from a constant. */ | |
4233 | if (GET_MODE (target) != BLKmode || nbits <= 2 * BITS_PER_WORD | |
4234 | || (nbytes <= 32 && TREE_CHAIN (elt) != NULL_TREE)) | |
071a6595 | 4235 | { |
b4ee5a72 PB |
4236 | int set_word_size = TYPE_ALIGN (TREE_TYPE (exp)); |
4237 | enum machine_mode mode = mode_for_size (set_word_size, MODE_INT, 1); | |
0f41302f | 4238 | char *bit_buffer = (char *) alloca (nbits); |
b4ee5a72 PB |
4239 | HOST_WIDE_INT word = 0; |
4240 | int bit_pos = 0; | |
4241 | int ibit = 0; | |
0f41302f | 4242 | int offset = 0; /* In bytes from beginning of set. */ |
e1a43f73 | 4243 | elt = get_set_constructor_bits (exp, bit_buffer, nbits); |
b4ee5a72 | 4244 | for (;;) |
071a6595 | 4245 | { |
b4ee5a72 PB |
4246 | if (bit_buffer[ibit]) |
4247 | { | |
b09f3348 | 4248 | if (BYTES_BIG_ENDIAN) |
b4ee5a72 PB |
4249 | word |= (1 << (set_word_size - 1 - bit_pos)); |
4250 | else | |
4251 | word |= 1 << bit_pos; | |
4252 | } | |
4253 | bit_pos++; ibit++; | |
4254 | if (bit_pos >= set_word_size || ibit == nbits) | |
071a6595 | 4255 | { |
e1a43f73 PB |
4256 | if (word != 0 || ! cleared) |
4257 | { | |
4258 | rtx datum = GEN_INT (word); | |
4259 | rtx to_rtx; | |
0f41302f MS |
4260 | /* The assumption here is that it is safe to use |
4261 | XEXP if the set is multi-word, but not if | |
4262 | it's single-word. */ | |
e1a43f73 PB |
4263 | if (GET_CODE (target) == MEM) |
4264 | { | |
4265 | to_rtx = plus_constant (XEXP (target, 0), offset); | |
4266 | to_rtx = change_address (target, mode, to_rtx); | |
4267 | } | |
4268 | else if (offset == 0) | |
4269 | to_rtx = target; | |
4270 | else | |
4271 | abort (); | |
4272 | emit_move_insn (to_rtx, datum); | |
4273 | } | |
b4ee5a72 PB |
4274 | if (ibit == nbits) |
4275 | break; | |
4276 | word = 0; | |
4277 | bit_pos = 0; | |
4278 | offset += set_word_size / BITS_PER_UNIT; | |
071a6595 PB |
4279 | } |
4280 | } | |
071a6595 | 4281 | } |
e1a43f73 PB |
4282 | else if (!cleared) |
4283 | { | |
0f41302f | 4284 | /* Don't bother clearing storage if the set is all ones. */ |
e1a43f73 PB |
4285 | if (TREE_CHAIN (elt) != NULL_TREE |
4286 | || (TREE_PURPOSE (elt) == NULL_TREE | |
4287 | ? nbits != 1 | |
4288 | : (TREE_CODE (TREE_VALUE (elt)) != INTEGER_CST | |
4289 | || TREE_CODE (TREE_PURPOSE (elt)) != INTEGER_CST | |
4290 | || (TREE_INT_CST_LOW (TREE_VALUE (elt)) | |
4291 | - TREE_INT_CST_LOW (TREE_PURPOSE (elt)) + 1 | |
4292 | != nbits)))) | |
4293 | clear_storage (target, expr_size (exp), | |
4294 | TYPE_ALIGN (type) / BITS_PER_UNIT); | |
4295 | } | |
4296 | ||
4297 | for (; elt != NULL_TREE; elt = TREE_CHAIN (elt)) | |
071a6595 PB |
4298 | { |
4299 | /* start of range of element or NULL */ | |
4300 | tree startbit = TREE_PURPOSE (elt); | |
4301 | /* end of range of element, or element value */ | |
4302 | tree endbit = TREE_VALUE (elt); | |
381127e8 | 4303 | #ifdef TARGET_MEM_FUNCTIONS |
071a6595 | 4304 | HOST_WIDE_INT startb, endb; |
381127e8 | 4305 | #endif |
071a6595 PB |
4306 | rtx bitlength_rtx, startbit_rtx, endbit_rtx, targetx; |
4307 | ||
4308 | bitlength_rtx = expand_expr (bitlength, | |
4309 | NULL_RTX, MEM, EXPAND_CONST_ADDRESS); | |
4310 | ||
4311 | /* handle non-range tuple element like [ expr ] */ | |
4312 | if (startbit == NULL_TREE) | |
4313 | { | |
4314 | startbit = save_expr (endbit); | |
4315 | endbit = startbit; | |
4316 | } | |
4317 | startbit = convert (sizetype, startbit); | |
4318 | endbit = convert (sizetype, endbit); | |
4319 | if (! integer_zerop (domain_min)) | |
4320 | { | |
4321 | startbit = size_binop (MINUS_EXPR, startbit, domain_min); | |
4322 | endbit = size_binop (MINUS_EXPR, endbit, domain_min); | |
4323 | } | |
4324 | startbit_rtx = expand_expr (startbit, NULL_RTX, MEM, | |
4325 | EXPAND_CONST_ADDRESS); | |
4326 | endbit_rtx = expand_expr (endbit, NULL_RTX, MEM, | |
4327 | EXPAND_CONST_ADDRESS); | |
4328 | ||
4329 | if (REG_P (target)) | |
4330 | { | |
4331 | targetx = assign_stack_temp (GET_MODE (target), | |
4332 | GET_MODE_SIZE (GET_MODE (target)), | |
4333 | 0); | |
4334 | emit_move_insn (targetx, target); | |
4335 | } | |
4336 | else if (GET_CODE (target) == MEM) | |
4337 | targetx = target; | |
4338 | else | |
4339 | abort (); | |
4340 | ||
4341 | #ifdef TARGET_MEM_FUNCTIONS | |
4342 | /* Optimization: If startbit and endbit are | |
9faa82d8 | 4343 | constants divisible by BITS_PER_UNIT, |
0f41302f | 4344 | call memset instead. */ |
071a6595 PB |
4345 | if (TREE_CODE (startbit) == INTEGER_CST |
4346 | && TREE_CODE (endbit) == INTEGER_CST | |
4347 | && (startb = TREE_INT_CST_LOW (startbit)) % BITS_PER_UNIT == 0 | |
e1a43f73 | 4348 | && (endb = TREE_INT_CST_LOW (endbit) + 1) % BITS_PER_UNIT == 0) |
071a6595 | 4349 | { |
071a6595 PB |
4350 | emit_library_call (memset_libfunc, 0, |
4351 | VOIDmode, 3, | |
e1a43f73 PB |
4352 | plus_constant (XEXP (targetx, 0), |
4353 | startb / BITS_PER_UNIT), | |
071a6595 | 4354 | Pmode, |
3b6f75e2 | 4355 | constm1_rtx, TYPE_MODE (integer_type_node), |
071a6595 | 4356 | GEN_INT ((endb - startb) / BITS_PER_UNIT), |
3b6f75e2 | 4357 | TYPE_MODE (sizetype)); |
071a6595 PB |
4358 | } |
4359 | else | |
4360 | #endif | |
4361 | { | |
38a448ca | 4362 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__setbits"), |
071a6595 PB |
4363 | 0, VOIDmode, 4, XEXP (targetx, 0), Pmode, |
4364 | bitlength_rtx, TYPE_MODE (sizetype), | |
4365 | startbit_rtx, TYPE_MODE (sizetype), | |
4366 | endbit_rtx, TYPE_MODE (sizetype)); | |
4367 | } | |
4368 | if (REG_P (target)) | |
4369 | emit_move_insn (target, targetx); | |
4370 | } | |
4371 | } | |
bbf6f052 RK |
4372 | |
4373 | else | |
4374 | abort (); | |
4375 | } | |
4376 | ||
4377 | /* Store the value of EXP (an expression tree) | |
4378 | into a subfield of TARGET which has mode MODE and occupies | |
4379 | BITSIZE bits, starting BITPOS bits from the start of TARGET. | |
4380 | If MODE is VOIDmode, it means that we are storing into a bit-field. | |
4381 | ||
4382 | If VALUE_MODE is VOIDmode, return nothing in particular. | |
4383 | UNSIGNEDP is not used in this case. | |
4384 | ||
4385 | Otherwise, return an rtx for the value stored. This rtx | |
4386 | has mode VALUE_MODE if that is convenient to do. | |
4387 | In this case, UNSIGNEDP must be nonzero if the value is an unsigned type. | |
4388 | ||
4389 | ALIGN is the alignment that TARGET is known to have, measured in bytes. | |
ece32014 MM |
4390 | TOTAL_SIZE is the size in bytes of the structure, or -1 if varying. |
4391 | ||
4392 | ALIAS_SET is the alias set for the destination. This value will | |
4393 | (in general) be different from that for TARGET, since TARGET is a | |
4394 | reference to the containing structure. */ | |
bbf6f052 RK |
4395 | |
4396 | static rtx | |
4397 | store_field (target, bitsize, bitpos, mode, exp, value_mode, | |
ece32014 | 4398 | unsignedp, align, total_size, alias_set) |
bbf6f052 RK |
4399 | rtx target; |
4400 | int bitsize, bitpos; | |
4401 | enum machine_mode mode; | |
4402 | tree exp; | |
4403 | enum machine_mode value_mode; | |
4404 | int unsignedp; | |
4405 | int align; | |
4406 | int total_size; | |
ece32014 | 4407 | int alias_set; |
bbf6f052 | 4408 | { |
906c4e36 | 4409 | HOST_WIDE_INT width_mask = 0; |
bbf6f052 | 4410 | |
e9a25f70 JL |
4411 | if (TREE_CODE (exp) == ERROR_MARK) |
4412 | return const0_rtx; | |
4413 | ||
906c4e36 RK |
4414 | if (bitsize < HOST_BITS_PER_WIDE_INT) |
4415 | width_mask = ((HOST_WIDE_INT) 1 << bitsize) - 1; | |
bbf6f052 RK |
4416 | |
4417 | /* If we are storing into an unaligned field of an aligned union that is | |
4418 | in a register, we may have the mode of TARGET being an integer mode but | |
4419 | MODE == BLKmode. In that case, get an aligned object whose size and | |
4420 | alignment are the same as TARGET and store TARGET into it (we can avoid | |
4421 | the store if the field being stored is the entire width of TARGET). Then | |
4422 | call ourselves recursively to store the field into a BLKmode version of | |
4423 | that object. Finally, load from the object into TARGET. This is not | |
4424 | very efficient in general, but should only be slightly more expensive | |
4425 | than the otherwise-required unaligned accesses. Perhaps this can be | |
4426 | cleaned up later. */ | |
4427 | ||
4428 | if (mode == BLKmode | |
4429 | && (GET_CODE (target) == REG || GET_CODE (target) == SUBREG)) | |
4430 | { | |
4431 | rtx object = assign_stack_temp (GET_MODE (target), | |
4432 | GET_MODE_SIZE (GET_MODE (target)), 0); | |
4433 | rtx blk_object = copy_rtx (object); | |
4434 | ||
24a13950 JW |
4435 | MEM_IN_STRUCT_P (object) = 1; |
4436 | MEM_IN_STRUCT_P (blk_object) = 1; | |
bbf6f052 RK |
4437 | PUT_MODE (blk_object, BLKmode); |
4438 | ||
4439 | if (bitsize != GET_MODE_BITSIZE (GET_MODE (target))) | |
4440 | emit_move_insn (object, target); | |
4441 | ||
4442 | store_field (blk_object, bitsize, bitpos, mode, exp, VOIDmode, 0, | |
ece32014 | 4443 | align, total_size, alias_set); |
bbf6f052 | 4444 | |
46093b97 RS |
4445 | /* Even though we aren't returning target, we need to |
4446 | give it the updated value. */ | |
bbf6f052 RK |
4447 | emit_move_insn (target, object); |
4448 | ||
46093b97 | 4449 | return blk_object; |
bbf6f052 RK |
4450 | } |
4451 | ||
4452 | /* If the structure is in a register or if the component | |
4453 | is a bit field, we cannot use addressing to access it. | |
4454 | Use bit-field techniques or SUBREG to store in it. */ | |
4455 | ||
4fa52007 RK |
4456 | if (mode == VOIDmode |
4457 | || (mode != BLKmode && ! direct_store[(int) mode]) | |
4458 | || GET_CODE (target) == REG | |
c980ac49 | 4459 | || GET_CODE (target) == SUBREG |
ccc98036 RS |
4460 | /* If the field isn't aligned enough to store as an ordinary memref, |
4461 | store it as a bit field. */ | |
c7a7ac46 | 4462 | || (SLOW_UNALIGNED_ACCESS |
ccc98036 | 4463 | && align * BITS_PER_UNIT < GET_MODE_ALIGNMENT (mode)) |
c7a7ac46 | 4464 | || (SLOW_UNALIGNED_ACCESS && bitpos % GET_MODE_ALIGNMENT (mode) != 0)) |
bbf6f052 | 4465 | { |
906c4e36 | 4466 | rtx temp = expand_expr (exp, NULL_RTX, VOIDmode, 0); |
bbd6cf73 | 4467 | |
ef19912d RK |
4468 | /* If BITSIZE is narrower than the size of the type of EXP |
4469 | we will be narrowing TEMP. Normally, what's wanted are the | |
4470 | low-order bits. However, if EXP's type is a record and this is | |
4471 | big-endian machine, we want the upper BITSIZE bits. */ | |
4472 | if (BYTES_BIG_ENDIAN && GET_MODE_CLASS (GET_MODE (temp)) == MODE_INT | |
4473 | && bitsize < GET_MODE_BITSIZE (GET_MODE (temp)) | |
4474 | && TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE) | |
4475 | temp = expand_shift (RSHIFT_EXPR, GET_MODE (temp), temp, | |
4476 | size_int (GET_MODE_BITSIZE (GET_MODE (temp)) | |
4477 | - bitsize), | |
4478 | temp, 1); | |
4479 | ||
bbd6cf73 RK |
4480 | /* Unless MODE is VOIDmode or BLKmode, convert TEMP to |
4481 | MODE. */ | |
4482 | if (mode != VOIDmode && mode != BLKmode | |
4483 | && mode != TYPE_MODE (TREE_TYPE (exp))) | |
4484 | temp = convert_modes (mode, TYPE_MODE (TREE_TYPE (exp)), temp, 1); | |
4485 | ||
a281e72d RK |
4486 | /* If the modes of TARGET and TEMP are both BLKmode, both |
4487 | must be in memory and BITPOS must be aligned on a byte | |
4488 | boundary. If so, we simply do a block copy. */ | |
4489 | if (GET_MODE (target) == BLKmode && GET_MODE (temp) == BLKmode) | |
4490 | { | |
4491 | if (GET_CODE (target) != MEM || GET_CODE (temp) != MEM | |
4492 | || bitpos % BITS_PER_UNIT != 0) | |
4493 | abort (); | |
4494 | ||
0086427c RK |
4495 | target = change_address (target, VOIDmode, |
4496 | plus_constant (XEXP (target, 0), | |
a281e72d RK |
4497 | bitpos / BITS_PER_UNIT)); |
4498 | ||
4499 | emit_block_move (target, temp, | |
4500 | GEN_INT ((bitsize + BITS_PER_UNIT - 1) | |
4501 | / BITS_PER_UNIT), | |
4502 | 1); | |
4503 | ||
4504 | return value_mode == VOIDmode ? const0_rtx : target; | |
4505 | } | |
4506 | ||
bbf6f052 RK |
4507 | /* Store the value in the bitfield. */ |
4508 | store_bit_field (target, bitsize, bitpos, mode, temp, align, total_size); | |
4509 | if (value_mode != VOIDmode) | |
4510 | { | |
4511 | /* The caller wants an rtx for the value. */ | |
4512 | /* If possible, avoid refetching from the bitfield itself. */ | |
4513 | if (width_mask != 0 | |
4514 | && ! (GET_CODE (target) == MEM && MEM_VOLATILE_P (target))) | |
5c4d7cfb | 4515 | { |
9074de27 | 4516 | tree count; |
5c4d7cfb | 4517 | enum machine_mode tmode; |
86a2c12a | 4518 | |
5c4d7cfb RS |
4519 | if (unsignedp) |
4520 | return expand_and (temp, GEN_INT (width_mask), NULL_RTX); | |
4521 | tmode = GET_MODE (temp); | |
86a2c12a RS |
4522 | if (tmode == VOIDmode) |
4523 | tmode = value_mode; | |
5c4d7cfb RS |
4524 | count = build_int_2 (GET_MODE_BITSIZE (tmode) - bitsize, 0); |
4525 | temp = expand_shift (LSHIFT_EXPR, tmode, temp, count, 0, 0); | |
4526 | return expand_shift (RSHIFT_EXPR, tmode, temp, count, 0, 0); | |
4527 | } | |
bbf6f052 | 4528 | return extract_bit_field (target, bitsize, bitpos, unsignedp, |
906c4e36 RK |
4529 | NULL_RTX, value_mode, 0, align, |
4530 | total_size); | |
bbf6f052 RK |
4531 | } |
4532 | return const0_rtx; | |
4533 | } | |
4534 | else | |
4535 | { | |
4536 | rtx addr = XEXP (target, 0); | |
4537 | rtx to_rtx; | |
4538 | ||
4539 | /* If a value is wanted, it must be the lhs; | |
4540 | so make the address stable for multiple use. */ | |
4541 | ||
4542 | if (value_mode != VOIDmode && GET_CODE (addr) != REG | |
4543 | && ! CONSTANT_ADDRESS_P (addr) | |
4544 | /* A frame-pointer reference is already stable. */ | |
4545 | && ! (GET_CODE (addr) == PLUS | |
4546 | && GET_CODE (XEXP (addr, 1)) == CONST_INT | |
4547 | && (XEXP (addr, 0) == virtual_incoming_args_rtx | |
4548 | || XEXP (addr, 0) == virtual_stack_vars_rtx))) | |
4549 | addr = copy_to_reg (addr); | |
4550 | ||
4551 | /* Now build a reference to just the desired component. */ | |
4552 | ||
effbcc6a RK |
4553 | to_rtx = copy_rtx (change_address (target, mode, |
4554 | plus_constant (addr, | |
4555 | (bitpos | |
4556 | / BITS_PER_UNIT)))); | |
bbf6f052 | 4557 | MEM_IN_STRUCT_P (to_rtx) = 1; |
ece32014 | 4558 | MEM_ALIAS_SET (to_rtx) = alias_set; |
bbf6f052 RK |
4559 | |
4560 | return store_expr (exp, to_rtx, value_mode != VOIDmode); | |
4561 | } | |
4562 | } | |
4563 | \f | |
4564 | /* Given an expression EXP that may be a COMPONENT_REF, a BIT_FIELD_REF, | |
4565 | or an ARRAY_REF, look for nested COMPONENT_REFs, BIT_FIELD_REFs, or | |
742920c7 | 4566 | ARRAY_REFs and find the ultimate containing object, which we return. |
bbf6f052 RK |
4567 | |
4568 | We set *PBITSIZE to the size in bits that we want, *PBITPOS to the | |
4569 | bit position, and *PUNSIGNEDP to the signedness of the field. | |
7bb0943f RS |
4570 | If the position of the field is variable, we store a tree |
4571 | giving the variable offset (in units) in *POFFSET. | |
4572 | This offset is in addition to the bit position. | |
4573 | If the position is not variable, we store 0 in *POFFSET. | |
839c4796 RK |
4574 | We set *PALIGNMENT to the alignment in bytes of the address that will be |
4575 | computed. This is the alignment of the thing we return if *POFFSET | |
4576 | is zero, but can be more less strictly aligned if *POFFSET is nonzero. | |
bbf6f052 RK |
4577 | |
4578 | If any of the extraction expressions is volatile, | |
4579 | we store 1 in *PVOLATILEP. Otherwise we don't change that. | |
4580 | ||
4581 | If the field is a bit-field, *PMODE is set to VOIDmode. Otherwise, it | |
4582 | is a mode that can be used to access the field. In that case, *PBITSIZE | |
e7c33f54 RK |
4583 | is redundant. |
4584 | ||
4585 | If the field describes a variable-sized object, *PMODE is set to | |
4586 | VOIDmode and *PBITSIZE is set to -1. An access cannot be made in | |
839c4796 | 4587 | this case, but the address of the object can be found. */ |
bbf6f052 RK |
4588 | |
4589 | tree | |
4969d05d | 4590 | get_inner_reference (exp, pbitsize, pbitpos, poffset, pmode, |
839c4796 | 4591 | punsignedp, pvolatilep, palignment) |
bbf6f052 RK |
4592 | tree exp; |
4593 | int *pbitsize; | |
4594 | int *pbitpos; | |
7bb0943f | 4595 | tree *poffset; |
bbf6f052 RK |
4596 | enum machine_mode *pmode; |
4597 | int *punsignedp; | |
4598 | int *pvolatilep; | |
839c4796 | 4599 | int *palignment; |
bbf6f052 | 4600 | { |
b50d17a1 | 4601 | tree orig_exp = exp; |
bbf6f052 RK |
4602 | tree size_tree = 0; |
4603 | enum machine_mode mode = VOIDmode; | |
742920c7 | 4604 | tree offset = integer_zero_node; |
839c4796 | 4605 | int alignment = BIGGEST_ALIGNMENT; |
bbf6f052 RK |
4606 | |
4607 | if (TREE_CODE (exp) == COMPONENT_REF) | |
4608 | { | |
4609 | size_tree = DECL_SIZE (TREE_OPERAND (exp, 1)); | |
4610 | if (! DECL_BIT_FIELD (TREE_OPERAND (exp, 1))) | |
4611 | mode = DECL_MODE (TREE_OPERAND (exp, 1)); | |
4612 | *punsignedp = TREE_UNSIGNED (TREE_OPERAND (exp, 1)); | |
4613 | } | |
4614 | else if (TREE_CODE (exp) == BIT_FIELD_REF) | |
4615 | { | |
4616 | size_tree = TREE_OPERAND (exp, 1); | |
4617 | *punsignedp = TREE_UNSIGNED (exp); | |
4618 | } | |
4619 | else | |
4620 | { | |
4621 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
4622 | *pbitsize = GET_MODE_BITSIZE (mode); | |
4623 | *punsignedp = TREE_UNSIGNED (TREE_TYPE (exp)); | |
4624 | } | |
4625 | ||
4626 | if (size_tree) | |
4627 | { | |
4628 | if (TREE_CODE (size_tree) != INTEGER_CST) | |
e7c33f54 RK |
4629 | mode = BLKmode, *pbitsize = -1; |
4630 | else | |
4631 | *pbitsize = TREE_INT_CST_LOW (size_tree); | |
bbf6f052 RK |
4632 | } |
4633 | ||
4634 | /* Compute cumulative bit-offset for nested component-refs and array-refs, | |
4635 | and find the ultimate containing object. */ | |
4636 | ||
4637 | *pbitpos = 0; | |
4638 | ||
4639 | while (1) | |
4640 | { | |
7bb0943f | 4641 | if (TREE_CODE (exp) == COMPONENT_REF || TREE_CODE (exp) == BIT_FIELD_REF) |
bbf6f052 | 4642 | { |
7bb0943f RS |
4643 | tree pos = (TREE_CODE (exp) == COMPONENT_REF |
4644 | ? DECL_FIELD_BITPOS (TREE_OPERAND (exp, 1)) | |
4645 | : TREE_OPERAND (exp, 2)); | |
e6d8c385 | 4646 | tree constant = integer_zero_node, var = pos; |
bbf6f052 | 4647 | |
e7f3c83f RK |
4648 | /* If this field hasn't been filled in yet, don't go |
4649 | past it. This should only happen when folding expressions | |
4650 | made during type construction. */ | |
4651 | if (pos == 0) | |
4652 | break; | |
4653 | ||
e6d8c385 RK |
4654 | /* Assume here that the offset is a multiple of a unit. |
4655 | If not, there should be an explicitly added constant. */ | |
4656 | if (TREE_CODE (pos) == PLUS_EXPR | |
4657 | && TREE_CODE (TREE_OPERAND (pos, 1)) == INTEGER_CST) | |
4658 | constant = TREE_OPERAND (pos, 1), var = TREE_OPERAND (pos, 0); | |
7bb0943f | 4659 | else if (TREE_CODE (pos) == INTEGER_CST) |
e6d8c385 RK |
4660 | constant = pos, var = integer_zero_node; |
4661 | ||
4662 | *pbitpos += TREE_INT_CST_LOW (constant); | |
8d8c9ba9 RK |
4663 | offset = size_binop (PLUS_EXPR, offset, |
4664 | size_binop (EXACT_DIV_EXPR, var, | |
4665 | size_int (BITS_PER_UNIT))); | |
bbf6f052 | 4666 | } |
bbf6f052 | 4667 | |
742920c7 | 4668 | else if (TREE_CODE (exp) == ARRAY_REF) |
bbf6f052 | 4669 | { |
742920c7 RK |
4670 | /* This code is based on the code in case ARRAY_REF in expand_expr |
4671 | below. We assume here that the size of an array element is | |
4672 | always an integral multiple of BITS_PER_UNIT. */ | |
4673 | ||
4674 | tree index = TREE_OPERAND (exp, 1); | |
4675 | tree domain = TYPE_DOMAIN (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
4676 | tree low_bound | |
4677 | = domain ? TYPE_MIN_VALUE (domain) : integer_zero_node; | |
4678 | tree index_type = TREE_TYPE (index); | |
ead17059 | 4679 | tree xindex; |
742920c7 | 4680 | |
4c08eef0 | 4681 | if (TYPE_PRECISION (index_type) != TYPE_PRECISION (sizetype)) |
742920c7 | 4682 | { |
4c08eef0 RK |
4683 | index = convert (type_for_size (TYPE_PRECISION (sizetype), 0), |
4684 | index); | |
742920c7 RK |
4685 | index_type = TREE_TYPE (index); |
4686 | } | |
4687 | ||
74a4fbfc DB |
4688 | /* Optimize the special-case of a zero lower bound. |
4689 | ||
4690 | We convert the low_bound to sizetype to avoid some problems | |
4691 | with constant folding. (E.g. suppose the lower bound is 1, | |
4692 | and its mode is QI. Without the conversion, (ARRAY | |
4693 | +(INDEX-(unsigned char)1)) becomes ((ARRAY+(-(unsigned char)1)) | |
4694 | +INDEX), which becomes (ARRAY+255+INDEX). Oops!) | |
4695 | ||
4696 | But sizetype isn't quite right either (especially if | |
4697 | the lowbound is negative). FIXME */ | |
4698 | ||
ca0f2220 | 4699 | if (! integer_zerop (low_bound)) |
74a4fbfc DB |
4700 | index = fold (build (MINUS_EXPR, index_type, index, |
4701 | convert (sizetype, low_bound))); | |
ca0f2220 | 4702 | |
f8dac6eb R |
4703 | if (TREE_CODE (index) == INTEGER_CST) |
4704 | { | |
4705 | index = convert (sbitsizetype, index); | |
4706 | index_type = TREE_TYPE (index); | |
4707 | } | |
4708 | ||
ead17059 RH |
4709 | xindex = fold (build (MULT_EXPR, sbitsizetype, index, |
4710 | convert (sbitsizetype, | |
4711 | TYPE_SIZE (TREE_TYPE (exp))))); | |
742920c7 | 4712 | |
ead17059 RH |
4713 | if (TREE_CODE (xindex) == INTEGER_CST |
4714 | && TREE_INT_CST_HIGH (xindex) == 0) | |
4715 | *pbitpos += TREE_INT_CST_LOW (xindex); | |
742920c7 | 4716 | else |
956d6950 | 4717 | { |
ead17059 RH |
4718 | /* Either the bit offset calculated above is not constant, or |
4719 | it overflowed. In either case, redo the multiplication | |
4720 | against the size in units. This is especially important | |
4721 | in the non-constant case to avoid a division at runtime. */ | |
4722 | xindex = fold (build (MULT_EXPR, ssizetype, index, | |
4723 | convert (ssizetype, | |
4724 | TYPE_SIZE_UNIT (TREE_TYPE (exp))))); | |
4725 | ||
4726 | if (contains_placeholder_p (xindex)) | |
4727 | xindex = build (WITH_RECORD_EXPR, sizetype, xindex, exp); | |
4728 | ||
4729 | offset = size_binop (PLUS_EXPR, offset, xindex); | |
956d6950 | 4730 | } |
bbf6f052 RK |
4731 | } |
4732 | else if (TREE_CODE (exp) != NON_LVALUE_EXPR | |
4733 | && ! ((TREE_CODE (exp) == NOP_EXPR | |
4734 | || TREE_CODE (exp) == CONVERT_EXPR) | |
7f62854a RK |
4735 | && ! (TREE_CODE (TREE_TYPE (exp)) == UNION_TYPE |
4736 | && (TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) | |
4737 | != UNION_TYPE)) | |
bbf6f052 RK |
4738 | && (TYPE_MODE (TREE_TYPE (exp)) |
4739 | == TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0)))))) | |
4740 | break; | |
7bb0943f RS |
4741 | |
4742 | /* If any reference in the chain is volatile, the effect is volatile. */ | |
4743 | if (TREE_THIS_VOLATILE (exp)) | |
4744 | *pvolatilep = 1; | |
839c4796 RK |
4745 | |
4746 | /* If the offset is non-constant already, then we can't assume any | |
4747 | alignment more than the alignment here. */ | |
4748 | if (! integer_zerop (offset)) | |
4749 | alignment = MIN (alignment, TYPE_ALIGN (TREE_TYPE (exp))); | |
4750 | ||
bbf6f052 RK |
4751 | exp = TREE_OPERAND (exp, 0); |
4752 | } | |
4753 | ||
839c4796 RK |
4754 | if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'd') |
4755 | alignment = MIN (alignment, DECL_ALIGN (exp)); | |
9293498f | 4756 | else if (TREE_TYPE (exp) != 0) |
839c4796 RK |
4757 | alignment = MIN (alignment, TYPE_ALIGN (TREE_TYPE (exp))); |
4758 | ||
742920c7 RK |
4759 | if (integer_zerop (offset)) |
4760 | offset = 0; | |
4761 | ||
b50d17a1 RK |
4762 | if (offset != 0 && contains_placeholder_p (offset)) |
4763 | offset = build (WITH_RECORD_EXPR, sizetype, offset, orig_exp); | |
4764 | ||
bbf6f052 | 4765 | *pmode = mode; |
7bb0943f | 4766 | *poffset = offset; |
839c4796 | 4767 | *palignment = alignment / BITS_PER_UNIT; |
bbf6f052 RK |
4768 | return exp; |
4769 | } | |
921b3427 RK |
4770 | |
4771 | /* Subroutine of expand_exp: compute memory_usage from modifier. */ | |
4772 | static enum memory_use_mode | |
4773 | get_memory_usage_from_modifier (modifier) | |
4774 | enum expand_modifier modifier; | |
4775 | { | |
4776 | switch (modifier) | |
4777 | { | |
4778 | case EXPAND_NORMAL: | |
e5e809f4 | 4779 | case EXPAND_SUM: |
921b3427 RK |
4780 | return MEMORY_USE_RO; |
4781 | break; | |
4782 | case EXPAND_MEMORY_USE_WO: | |
4783 | return MEMORY_USE_WO; | |
4784 | break; | |
4785 | case EXPAND_MEMORY_USE_RW: | |
4786 | return MEMORY_USE_RW; | |
4787 | break; | |
921b3427 | 4788 | case EXPAND_MEMORY_USE_DONT: |
e5e809f4 JL |
4789 | /* EXPAND_CONST_ADDRESS and EXPAND_INITIALIZER are converted into |
4790 | MEMORY_USE_DONT, because they are modifiers to a call of | |
4791 | expand_expr in the ADDR_EXPR case of expand_expr. */ | |
921b3427 | 4792 | case EXPAND_CONST_ADDRESS: |
e5e809f4 | 4793 | case EXPAND_INITIALIZER: |
921b3427 RK |
4794 | return MEMORY_USE_DONT; |
4795 | case EXPAND_MEMORY_USE_BAD: | |
4796 | default: | |
4797 | abort (); | |
4798 | } | |
4799 | } | |
bbf6f052 RK |
4800 | \f |
4801 | /* Given an rtx VALUE that may contain additions and multiplications, | |
4802 | return an equivalent value that just refers to a register or memory. | |
4803 | This is done by generating instructions to perform the arithmetic | |
c45a13a6 RK |
4804 | and returning a pseudo-register containing the value. |
4805 | ||
4806 | The returned value may be a REG, SUBREG, MEM or constant. */ | |
bbf6f052 RK |
4807 | |
4808 | rtx | |
4809 | force_operand (value, target) | |
4810 | rtx value, target; | |
4811 | { | |
4812 | register optab binoptab = 0; | |
4813 | /* Use a temporary to force order of execution of calls to | |
4814 | `force_operand'. */ | |
4815 | rtx tmp; | |
4816 | register rtx op2; | |
4817 | /* Use subtarget as the target for operand 0 of a binary operation. */ | |
4818 | register rtx subtarget = (target != 0 && GET_CODE (target) == REG ? target : 0); | |
4819 | ||
8b015896 RH |
4820 | /* Check for a PIC address load. */ |
4821 | if (flag_pic | |
4822 | && (GET_CODE (value) == PLUS || GET_CODE (value) == MINUS) | |
4823 | && XEXP (value, 0) == pic_offset_table_rtx | |
4824 | && (GET_CODE (XEXP (value, 1)) == SYMBOL_REF | |
4825 | || GET_CODE (XEXP (value, 1)) == LABEL_REF | |
4826 | || GET_CODE (XEXP (value, 1)) == CONST)) | |
4827 | { | |
4828 | if (!subtarget) | |
4829 | subtarget = gen_reg_rtx (GET_MODE (value)); | |
4830 | emit_move_insn (subtarget, value); | |
4831 | return subtarget; | |
4832 | } | |
4833 | ||
bbf6f052 RK |
4834 | if (GET_CODE (value) == PLUS) |
4835 | binoptab = add_optab; | |
4836 | else if (GET_CODE (value) == MINUS) | |
4837 | binoptab = sub_optab; | |
4838 | else if (GET_CODE (value) == MULT) | |
4839 | { | |
4840 | op2 = XEXP (value, 1); | |
4841 | if (!CONSTANT_P (op2) | |
4842 | && !(GET_CODE (op2) == REG && op2 != subtarget)) | |
4843 | subtarget = 0; | |
4844 | tmp = force_operand (XEXP (value, 0), subtarget); | |
4845 | return expand_mult (GET_MODE (value), tmp, | |
906c4e36 | 4846 | force_operand (op2, NULL_RTX), |
bbf6f052 RK |
4847 | target, 0); |
4848 | } | |
4849 | ||
4850 | if (binoptab) | |
4851 | { | |
4852 | op2 = XEXP (value, 1); | |
4853 | if (!CONSTANT_P (op2) | |
4854 | && !(GET_CODE (op2) == REG && op2 != subtarget)) | |
4855 | subtarget = 0; | |
4856 | if (binoptab == sub_optab && GET_CODE (op2) == CONST_INT) | |
4857 | { | |
4858 | binoptab = add_optab; | |
4859 | op2 = negate_rtx (GET_MODE (value), op2); | |
4860 | } | |
4861 | ||
4862 | /* Check for an addition with OP2 a constant integer and our first | |
4863 | operand a PLUS of a virtual register and something else. In that | |
4864 | case, we want to emit the sum of the virtual register and the | |
4865 | constant first and then add the other value. This allows virtual | |
4866 | register instantiation to simply modify the constant rather than | |
4867 | creating another one around this addition. */ | |
4868 | if (binoptab == add_optab && GET_CODE (op2) == CONST_INT | |
4869 | && GET_CODE (XEXP (value, 0)) == PLUS | |
4870 | && GET_CODE (XEXP (XEXP (value, 0), 0)) == REG | |
4871 | && REGNO (XEXP (XEXP (value, 0), 0)) >= FIRST_VIRTUAL_REGISTER | |
4872 | && REGNO (XEXP (XEXP (value, 0), 0)) <= LAST_VIRTUAL_REGISTER) | |
4873 | { | |
4874 | rtx temp = expand_binop (GET_MODE (value), binoptab, | |
4875 | XEXP (XEXP (value, 0), 0), op2, | |
4876 | subtarget, 0, OPTAB_LIB_WIDEN); | |
4877 | return expand_binop (GET_MODE (value), binoptab, temp, | |
4878 | force_operand (XEXP (XEXP (value, 0), 1), 0), | |
4879 | target, 0, OPTAB_LIB_WIDEN); | |
4880 | } | |
4881 | ||
4882 | tmp = force_operand (XEXP (value, 0), subtarget); | |
4883 | return expand_binop (GET_MODE (value), binoptab, tmp, | |
906c4e36 | 4884 | force_operand (op2, NULL_RTX), |
bbf6f052 | 4885 | target, 0, OPTAB_LIB_WIDEN); |
8008b228 | 4886 | /* We give UNSIGNEDP = 0 to expand_binop |
bbf6f052 RK |
4887 | because the only operations we are expanding here are signed ones. */ |
4888 | } | |
4889 | return value; | |
4890 | } | |
4891 | \f | |
4892 | /* Subroutine of expand_expr: | |
4893 | save the non-copied parts (LIST) of an expr (LHS), and return a list | |
4894 | which can restore these values to their previous values, | |
4895 | should something modify their storage. */ | |
4896 | ||
4897 | static tree | |
4898 | save_noncopied_parts (lhs, list) | |
4899 | tree lhs; | |
4900 | tree list; | |
4901 | { | |
4902 | tree tail; | |
4903 | tree parts = 0; | |
4904 | ||
4905 | for (tail = list; tail; tail = TREE_CHAIN (tail)) | |
4906 | if (TREE_CODE (TREE_VALUE (tail)) == TREE_LIST) | |
4907 | parts = chainon (parts, save_noncopied_parts (lhs, TREE_VALUE (tail))); | |
4908 | else | |
4909 | { | |
4910 | tree part = TREE_VALUE (tail); | |
4911 | tree part_type = TREE_TYPE (part); | |
906c4e36 | 4912 | tree to_be_saved = build (COMPONENT_REF, part_type, lhs, part); |
06089a8b | 4913 | rtx target = assign_temp (part_type, 0, 1, 1); |
bbf6f052 | 4914 | if (! memory_address_p (TYPE_MODE (part_type), XEXP (target, 0))) |
906c4e36 | 4915 | target = change_address (target, TYPE_MODE (part_type), NULL_RTX); |
bbf6f052 | 4916 | parts = tree_cons (to_be_saved, |
906c4e36 RK |
4917 | build (RTL_EXPR, part_type, NULL_TREE, |
4918 | (tree) target), | |
bbf6f052 RK |
4919 | parts); |
4920 | store_expr (TREE_PURPOSE (parts), RTL_EXPR_RTL (TREE_VALUE (parts)), 0); | |
4921 | } | |
4922 | return parts; | |
4923 | } | |
4924 | ||
4925 | /* Subroutine of expand_expr: | |
4926 | record the non-copied parts (LIST) of an expr (LHS), and return a list | |
4927 | which specifies the initial values of these parts. */ | |
4928 | ||
4929 | static tree | |
4930 | init_noncopied_parts (lhs, list) | |
4931 | tree lhs; | |
4932 | tree list; | |
4933 | { | |
4934 | tree tail; | |
4935 | tree parts = 0; | |
4936 | ||
4937 | for (tail = list; tail; tail = TREE_CHAIN (tail)) | |
4938 | if (TREE_CODE (TREE_VALUE (tail)) == TREE_LIST) | |
4939 | parts = chainon (parts, init_noncopied_parts (lhs, TREE_VALUE (tail))); | |
4940 | else | |
4941 | { | |
4942 | tree part = TREE_VALUE (tail); | |
4943 | tree part_type = TREE_TYPE (part); | |
906c4e36 | 4944 | tree to_be_initialized = build (COMPONENT_REF, part_type, lhs, part); |
bbf6f052 RK |
4945 | parts = tree_cons (TREE_PURPOSE (tail), to_be_initialized, parts); |
4946 | } | |
4947 | return parts; | |
4948 | } | |
4949 | ||
4950 | /* Subroutine of expand_expr: return nonzero iff there is no way that | |
e5e809f4 JL |
4951 | EXP can reference X, which is being modified. TOP_P is nonzero if this |
4952 | call is going to be used to determine whether we need a temporary | |
ff439b5f CB |
4953 | for EXP, as opposed to a recursive call to this function. |
4954 | ||
4955 | It is always safe for this routine to return zero since it merely | |
4956 | searches for optimization opportunities. */ | |
bbf6f052 RK |
4957 | |
4958 | static int | |
e5e809f4 | 4959 | safe_from_p (x, exp, top_p) |
bbf6f052 RK |
4960 | rtx x; |
4961 | tree exp; | |
e5e809f4 | 4962 | int top_p; |
bbf6f052 RK |
4963 | { |
4964 | rtx exp_rtl = 0; | |
4965 | int i, nops; | |
ff439b5f CB |
4966 | static int save_expr_count; |
4967 | static int save_expr_size = 0; | |
4968 | static tree *save_expr_rewritten; | |
4969 | static tree save_expr_trees[256]; | |
bbf6f052 | 4970 | |
6676e72f RK |
4971 | if (x == 0 |
4972 | /* If EXP has varying size, we MUST use a target since we currently | |
8f6562d0 PB |
4973 | have no way of allocating temporaries of variable size |
4974 | (except for arrays that have TYPE_ARRAY_MAX_SIZE set). | |
4975 | So we assume here that something at a higher level has prevented a | |
f4510f37 | 4976 | clash. This is somewhat bogus, but the best we can do. Only |
e5e809f4 JL |
4977 | do this when X is BLKmode and when we are at the top level. */ |
4978 | || (top_p && TREE_TYPE (exp) != 0 && TYPE_SIZE (TREE_TYPE (exp)) != 0 | |
f4510f37 | 4979 | && TREE_CODE (TYPE_SIZE (TREE_TYPE (exp))) != INTEGER_CST |
8f6562d0 PB |
4980 | && (TREE_CODE (TREE_TYPE (exp)) != ARRAY_TYPE |
4981 | || TYPE_ARRAY_MAX_SIZE (TREE_TYPE (exp)) == NULL_TREE | |
4982 | || TREE_CODE (TYPE_ARRAY_MAX_SIZE (TREE_TYPE (exp))) | |
4983 | != INTEGER_CST) | |
f4510f37 | 4984 | && GET_MODE (x) == BLKmode)) |
bbf6f052 RK |
4985 | return 1; |
4986 | ||
ff439b5f CB |
4987 | if (top_p && save_expr_size == 0) |
4988 | { | |
4989 | int rtn; | |
4990 | ||
4991 | save_expr_count = 0; | |
4992 | save_expr_size = sizeof (save_expr_trees) / sizeof (save_expr_trees[0]); | |
4993 | save_expr_rewritten = &save_expr_trees[0]; | |
4994 | ||
4995 | rtn = safe_from_p (x, exp, 1); | |
4996 | ||
4997 | for (i = 0; i < save_expr_count; ++i) | |
4998 | { | |
4999 | if (TREE_CODE (save_expr_trees[i]) != ERROR_MARK) | |
5000 | abort (); | |
5001 | TREE_SET_CODE (save_expr_trees[i], SAVE_EXPR); | |
5002 | } | |
5003 | ||
5004 | save_expr_size = 0; | |
5005 | ||
5006 | return rtn; | |
5007 | } | |
5008 | ||
bbf6f052 RK |
5009 | /* If this is a subreg of a hard register, declare it unsafe, otherwise, |
5010 | find the underlying pseudo. */ | |
5011 | if (GET_CODE (x) == SUBREG) | |
5012 | { | |
5013 | x = SUBREG_REG (x); | |
5014 | if (GET_CODE (x) == REG && REGNO (x) < FIRST_PSEUDO_REGISTER) | |
5015 | return 0; | |
5016 | } | |
5017 | ||
5018 | /* If X is a location in the outgoing argument area, it is always safe. */ | |
5019 | if (GET_CODE (x) == MEM | |
5020 | && (XEXP (x, 0) == virtual_outgoing_args_rtx | |
5021 | || (GET_CODE (XEXP (x, 0)) == PLUS | |
5022 | && XEXP (XEXP (x, 0), 0) == virtual_outgoing_args_rtx))) | |
5023 | return 1; | |
5024 | ||
5025 | switch (TREE_CODE_CLASS (TREE_CODE (exp))) | |
5026 | { | |
5027 | case 'd': | |
5028 | exp_rtl = DECL_RTL (exp); | |
5029 | break; | |
5030 | ||
5031 | case 'c': | |
5032 | return 1; | |
5033 | ||
5034 | case 'x': | |
5035 | if (TREE_CODE (exp) == TREE_LIST) | |
f32fd778 | 5036 | return ((TREE_VALUE (exp) == 0 |
e5e809f4 | 5037 | || safe_from_p (x, TREE_VALUE (exp), 0)) |
bbf6f052 | 5038 | && (TREE_CHAIN (exp) == 0 |
e5e809f4 | 5039 | || safe_from_p (x, TREE_CHAIN (exp), 0))); |
ff439b5f CB |
5040 | else if (TREE_CODE (exp) == ERROR_MARK) |
5041 | return 1; /* An already-visited SAVE_EXPR? */ | |
bbf6f052 RK |
5042 | else |
5043 | return 0; | |
5044 | ||
5045 | case '1': | |
e5e809f4 | 5046 | return safe_from_p (x, TREE_OPERAND (exp, 0), 0); |
bbf6f052 RK |
5047 | |
5048 | case '2': | |
5049 | case '<': | |
e5e809f4 JL |
5050 | return (safe_from_p (x, TREE_OPERAND (exp, 0), 0) |
5051 | && safe_from_p (x, TREE_OPERAND (exp, 1), 0)); | |
bbf6f052 RK |
5052 | |
5053 | case 'e': | |
5054 | case 'r': | |
5055 | /* Now do code-specific tests. EXP_RTL is set to any rtx we find in | |
5056 | the expression. If it is set, we conflict iff we are that rtx or | |
5057 | both are in memory. Otherwise, we check all operands of the | |
5058 | expression recursively. */ | |
5059 | ||
5060 | switch (TREE_CODE (exp)) | |
5061 | { | |
5062 | case ADDR_EXPR: | |
e44842fe | 5063 | return (staticp (TREE_OPERAND (exp, 0)) |
e5e809f4 JL |
5064 | || safe_from_p (x, TREE_OPERAND (exp, 0), 0) |
5065 | || TREE_STATIC (exp)); | |
bbf6f052 RK |
5066 | |
5067 | case INDIRECT_REF: | |
5068 | if (GET_CODE (x) == MEM) | |
5069 | return 0; | |
5070 | break; | |
5071 | ||
5072 | case CALL_EXPR: | |
5073 | exp_rtl = CALL_EXPR_RTL (exp); | |
5074 | if (exp_rtl == 0) | |
5075 | { | |
5076 | /* Assume that the call will clobber all hard registers and | |
5077 | all of memory. */ | |
5078 | if ((GET_CODE (x) == REG && REGNO (x) < FIRST_PSEUDO_REGISTER) | |
5079 | || GET_CODE (x) == MEM) | |
5080 | return 0; | |
5081 | } | |
5082 | ||
5083 | break; | |
5084 | ||
5085 | case RTL_EXPR: | |
3bb5826a RK |
5086 | /* If a sequence exists, we would have to scan every instruction |
5087 | in the sequence to see if it was safe. This is probably not | |
5088 | worthwhile. */ | |
5089 | if (RTL_EXPR_SEQUENCE (exp)) | |
bbf6f052 RK |
5090 | return 0; |
5091 | ||
3bb5826a | 5092 | exp_rtl = RTL_EXPR_RTL (exp); |
bbf6f052 RK |
5093 | break; |
5094 | ||
5095 | case WITH_CLEANUP_EXPR: | |
5096 | exp_rtl = RTL_EXPR_RTL (exp); | |
5097 | break; | |
5098 | ||
5dab5552 | 5099 | case CLEANUP_POINT_EXPR: |
e5e809f4 | 5100 | return safe_from_p (x, TREE_OPERAND (exp, 0), 0); |
5dab5552 | 5101 | |
bbf6f052 RK |
5102 | case SAVE_EXPR: |
5103 | exp_rtl = SAVE_EXPR_RTL (exp); | |
ff439b5f CB |
5104 | if (exp_rtl) |
5105 | break; | |
5106 | ||
5107 | /* This SAVE_EXPR might appear many times in the top-level | |
5108 | safe_from_p() expression, and if it has a complex | |
5109 | subexpression, examining it multiple times could result | |
5110 | in a combinatorial explosion. E.g. on an Alpha | |
5111 | running at least 200MHz, a Fortran test case compiled with | |
5112 | optimization took about 28 minutes to compile -- even though | |
5113 | it was only a few lines long, and the complicated line causing | |
5114 | so much time to be spent in the earlier version of safe_from_p() | |
5115 | had only 293 or so unique nodes. | |
5116 | ||
5117 | So, turn this SAVE_EXPR into an ERROR_MARK for now, but remember | |
5118 | where it is so we can turn it back in the top-level safe_from_p() | |
5119 | when we're done. */ | |
5120 | ||
5121 | /* For now, don't bother re-sizing the array. */ | |
5122 | if (save_expr_count >= save_expr_size) | |
5123 | return 0; | |
5124 | save_expr_rewritten[save_expr_count++] = exp; | |
ff439b5f CB |
5125 | |
5126 | nops = tree_code_length[(int) SAVE_EXPR]; | |
5127 | for (i = 0; i < nops; i++) | |
ff59bfe6 JM |
5128 | { |
5129 | tree operand = TREE_OPERAND (exp, i); | |
5130 | if (operand == NULL_TREE) | |
5131 | continue; | |
5132 | TREE_SET_CODE (exp, ERROR_MARK); | |
5133 | if (!safe_from_p (x, operand, 0)) | |
5134 | return 0; | |
5135 | TREE_SET_CODE (exp, SAVE_EXPR); | |
5136 | } | |
5137 | TREE_SET_CODE (exp, ERROR_MARK); | |
ff439b5f | 5138 | return 1; |
bbf6f052 | 5139 | |
8129842c RS |
5140 | case BIND_EXPR: |
5141 | /* The only operand we look at is operand 1. The rest aren't | |
5142 | part of the expression. */ | |
e5e809f4 | 5143 | return safe_from_p (x, TREE_OPERAND (exp, 1), 0); |
8129842c | 5144 | |
bbf6f052 | 5145 | case METHOD_CALL_EXPR: |
0f41302f | 5146 | /* This takes a rtx argument, but shouldn't appear here. */ |
bbf6f052 | 5147 | abort (); |
e9a25f70 JL |
5148 | |
5149 | default: | |
5150 | break; | |
bbf6f052 RK |
5151 | } |
5152 | ||
5153 | /* If we have an rtx, we do not need to scan our operands. */ | |
5154 | if (exp_rtl) | |
5155 | break; | |
5156 | ||
5157 | nops = tree_code_length[(int) TREE_CODE (exp)]; | |
5158 | for (i = 0; i < nops; i++) | |
5159 | if (TREE_OPERAND (exp, i) != 0 | |
e5e809f4 | 5160 | && ! safe_from_p (x, TREE_OPERAND (exp, i), 0)) |
bbf6f052 RK |
5161 | return 0; |
5162 | } | |
5163 | ||
5164 | /* If we have an rtl, find any enclosed object. Then see if we conflict | |
5165 | with it. */ | |
5166 | if (exp_rtl) | |
5167 | { | |
5168 | if (GET_CODE (exp_rtl) == SUBREG) | |
5169 | { | |
5170 | exp_rtl = SUBREG_REG (exp_rtl); | |
5171 | if (GET_CODE (exp_rtl) == REG | |
5172 | && REGNO (exp_rtl) < FIRST_PSEUDO_REGISTER) | |
5173 | return 0; | |
5174 | } | |
5175 | ||
5176 | /* If the rtl is X, then it is not safe. Otherwise, it is unless both | |
5177 | are memory and EXP is not readonly. */ | |
5178 | return ! (rtx_equal_p (x, exp_rtl) | |
5179 | || (GET_CODE (x) == MEM && GET_CODE (exp_rtl) == MEM | |
5180 | && ! TREE_READONLY (exp))); | |
5181 | } | |
5182 | ||
5183 | /* If we reach here, it is safe. */ | |
5184 | return 1; | |
5185 | } | |
5186 | ||
5187 | /* Subroutine of expand_expr: return nonzero iff EXP is an | |
5188 | expression whose type is statically determinable. */ | |
5189 | ||
5190 | static int | |
5191 | fixed_type_p (exp) | |
5192 | tree exp; | |
5193 | { | |
5194 | if (TREE_CODE (exp) == PARM_DECL | |
5195 | || TREE_CODE (exp) == VAR_DECL | |
5196 | || TREE_CODE (exp) == CALL_EXPR || TREE_CODE (exp) == TARGET_EXPR | |
5197 | || TREE_CODE (exp) == COMPONENT_REF | |
5198 | || TREE_CODE (exp) == ARRAY_REF) | |
5199 | return 1; | |
5200 | return 0; | |
5201 | } | |
01c8a7c8 RK |
5202 | |
5203 | /* Subroutine of expand_expr: return rtx if EXP is a | |
5204 | variable or parameter; else return 0. */ | |
5205 | ||
5206 | static rtx | |
5207 | var_rtx (exp) | |
5208 | tree exp; | |
5209 | { | |
5210 | STRIP_NOPS (exp); | |
5211 | switch (TREE_CODE (exp)) | |
5212 | { | |
5213 | case PARM_DECL: | |
5214 | case VAR_DECL: | |
5215 | return DECL_RTL (exp); | |
5216 | default: | |
5217 | return 0; | |
5218 | } | |
5219 | } | |
dbecbbe4 JL |
5220 | |
5221 | #ifdef MAX_INTEGER_COMPUTATION_MODE | |
5222 | void | |
5223 | check_max_integer_computation_mode (exp) | |
5224 | tree exp; | |
5225 | { | |
5226 | enum tree_code code = TREE_CODE (exp); | |
5227 | enum machine_mode mode; | |
5228 | ||
71bca506 JL |
5229 | /* We must allow conversions of constants to MAX_INTEGER_COMPUTATION_MODE. */ |
5230 | if (code == NOP_EXPR | |
5231 | && TREE_CODE (TREE_OPERAND (exp, 0)) == INTEGER_CST) | |
5232 | return; | |
5233 | ||
dbecbbe4 JL |
5234 | /* First check the type of the overall operation. We need only look at |
5235 | unary, binary and relational operations. */ | |
5236 | if (TREE_CODE_CLASS (code) == '1' | |
5237 | || TREE_CODE_CLASS (code) == '2' | |
5238 | || TREE_CODE_CLASS (code) == '<') | |
5239 | { | |
5240 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
5241 | if (GET_MODE_CLASS (mode) == MODE_INT | |
5242 | && mode > MAX_INTEGER_COMPUTATION_MODE) | |
5243 | fatal ("unsupported wide integer operation"); | |
5244 | } | |
5245 | ||
5246 | /* Check operand of a unary op. */ | |
5247 | if (TREE_CODE_CLASS (code) == '1') | |
5248 | { | |
5249 | mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
5250 | if (GET_MODE_CLASS (mode) == MODE_INT | |
5251 | && mode > MAX_INTEGER_COMPUTATION_MODE) | |
5252 | fatal ("unsupported wide integer operation"); | |
5253 | } | |
5254 | ||
5255 | /* Check operands of a binary/comparison op. */ | |
5256 | if (TREE_CODE_CLASS (code) == '2' || TREE_CODE_CLASS (code) == '<') | |
5257 | { | |
5258 | mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
5259 | if (GET_MODE_CLASS (mode) == MODE_INT | |
5260 | && mode > MAX_INTEGER_COMPUTATION_MODE) | |
5261 | fatal ("unsupported wide integer operation"); | |
5262 | ||
5263 | mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 1))); | |
5264 | if (GET_MODE_CLASS (mode) == MODE_INT | |
5265 | && mode > MAX_INTEGER_COMPUTATION_MODE) | |
5266 | fatal ("unsupported wide integer operation"); | |
5267 | } | |
5268 | } | |
5269 | #endif | |
5270 | ||
bbf6f052 RK |
5271 | \f |
5272 | /* expand_expr: generate code for computing expression EXP. | |
5273 | An rtx for the computed value is returned. The value is never null. | |
5274 | In the case of a void EXP, const0_rtx is returned. | |
5275 | ||
5276 | The value may be stored in TARGET if TARGET is nonzero. | |
5277 | TARGET is just a suggestion; callers must assume that | |
5278 | the rtx returned may not be the same as TARGET. | |
5279 | ||
5280 | If TARGET is CONST0_RTX, it means that the value will be ignored. | |
5281 | ||
5282 | If TMODE is not VOIDmode, it suggests generating the | |
5283 | result in mode TMODE. But this is done only when convenient. | |
5284 | Otherwise, TMODE is ignored and the value generated in its natural mode. | |
5285 | TMODE is just a suggestion; callers must assume that | |
5286 | the rtx returned may not have mode TMODE. | |
5287 | ||
d6a5ac33 RK |
5288 | Note that TARGET may have neither TMODE nor MODE. In that case, it |
5289 | probably will not be used. | |
bbf6f052 RK |
5290 | |
5291 | If MODIFIER is EXPAND_SUM then when EXP is an addition | |
5292 | we can return an rtx of the form (MULT (REG ...) (CONST_INT ...)) | |
5293 | or a nest of (PLUS ...) and (MINUS ...) where the terms are | |
5294 | products as above, or REG or MEM, or constant. | |
5295 | Ordinarily in such cases we would output mul or add instructions | |
5296 | and then return a pseudo reg containing the sum. | |
5297 | ||
5298 | EXPAND_INITIALIZER is much like EXPAND_SUM except that | |
5299 | it also marks a label as absolutely required (it can't be dead). | |
26fcb35a | 5300 | It also makes a ZERO_EXTEND or SIGN_EXTEND instead of emitting extend insns. |
d6a5ac33 RK |
5301 | This is used for outputting expressions used in initializers. |
5302 | ||
5303 | EXPAND_CONST_ADDRESS says that it is okay to return a MEM | |
5304 | with a constant address even if that address is not normally legitimate. | |
5305 | EXPAND_INITIALIZER and EXPAND_SUM also have this effect. */ | |
bbf6f052 RK |
5306 | |
5307 | rtx | |
5308 | expand_expr (exp, target, tmode, modifier) | |
5309 | register tree exp; | |
5310 | rtx target; | |
5311 | enum machine_mode tmode; | |
5312 | enum expand_modifier modifier; | |
5313 | { | |
b50d17a1 RK |
5314 | /* Chain of pending expressions for PLACEHOLDER_EXPR to replace. |
5315 | This is static so it will be accessible to our recursive callees. */ | |
5316 | static tree placeholder_list = 0; | |
bbf6f052 RK |
5317 | register rtx op0, op1, temp; |
5318 | tree type = TREE_TYPE (exp); | |
5319 | int unsignedp = TREE_UNSIGNED (type); | |
5320 | register enum machine_mode mode = TYPE_MODE (type); | |
5321 | register enum tree_code code = TREE_CODE (exp); | |
5322 | optab this_optab; | |
5323 | /* Use subtarget as the target for operand 0 of a binary operation. */ | |
5324 | rtx subtarget = (target != 0 && GET_CODE (target) == REG ? target : 0); | |
5325 | rtx original_target = target; | |
dd27116b RK |
5326 | int ignore = (target == const0_rtx |
5327 | || ((code == NON_LVALUE_EXPR || code == NOP_EXPR | |
4d87de75 RS |
5328 | || code == CONVERT_EXPR || code == REFERENCE_EXPR |
5329 | || code == COND_EXPR) | |
dd27116b | 5330 | && TREE_CODE (type) == VOID_TYPE)); |
bbf6f052 | 5331 | tree context; |
921b3427 RK |
5332 | /* Used by check-memory-usage to make modifier read only. */ |
5333 | enum expand_modifier ro_modifier; | |
bbf6f052 | 5334 | |
921b3427 RK |
5335 | /* Make a read-only version of the modifier. */ |
5336 | if (modifier == EXPAND_NORMAL || modifier == EXPAND_SUM | |
5337 | || modifier == EXPAND_CONST_ADDRESS || modifier == EXPAND_INITIALIZER) | |
5338 | ro_modifier = modifier; | |
5339 | else | |
5340 | ro_modifier = EXPAND_NORMAL; | |
ca695ac9 | 5341 | |
bbf6f052 RK |
5342 | /* Don't use hard regs as subtargets, because the combiner |
5343 | can only handle pseudo regs. */ | |
5344 | if (subtarget && REGNO (subtarget) < FIRST_PSEUDO_REGISTER) | |
5345 | subtarget = 0; | |
5346 | /* Avoid subtargets inside loops, | |
5347 | since they hide some invariant expressions. */ | |
5348 | if (preserve_subexpressions_p ()) | |
5349 | subtarget = 0; | |
5350 | ||
dd27116b RK |
5351 | /* If we are going to ignore this result, we need only do something |
5352 | if there is a side-effect somewhere in the expression. If there | |
b50d17a1 RK |
5353 | is, short-circuit the most common cases here. Note that we must |
5354 | not call expand_expr with anything but const0_rtx in case this | |
5355 | is an initial expansion of a size that contains a PLACEHOLDER_EXPR. */ | |
bbf6f052 | 5356 | |
dd27116b RK |
5357 | if (ignore) |
5358 | { | |
5359 | if (! TREE_SIDE_EFFECTS (exp)) | |
5360 | return const0_rtx; | |
5361 | ||
5362 | /* Ensure we reference a volatile object even if value is ignored. */ | |
5363 | if (TREE_THIS_VOLATILE (exp) | |
5364 | && TREE_CODE (exp) != FUNCTION_DECL | |
5365 | && mode != VOIDmode && mode != BLKmode) | |
5366 | { | |
921b3427 | 5367 | temp = expand_expr (exp, NULL_RTX, VOIDmode, ro_modifier); |
dd27116b RK |
5368 | if (GET_CODE (temp) == MEM) |
5369 | temp = copy_to_reg (temp); | |
5370 | return const0_rtx; | |
5371 | } | |
5372 | ||
5373 | if (TREE_CODE_CLASS (code) == '1') | |
5374 | return expand_expr (TREE_OPERAND (exp, 0), const0_rtx, | |
921b3427 | 5375 | VOIDmode, ro_modifier); |
dd27116b RK |
5376 | else if (TREE_CODE_CLASS (code) == '2' |
5377 | || TREE_CODE_CLASS (code) == '<') | |
5378 | { | |
921b3427 RK |
5379 | expand_expr (TREE_OPERAND (exp, 0), const0_rtx, VOIDmode, ro_modifier); |
5380 | expand_expr (TREE_OPERAND (exp, 1), const0_rtx, VOIDmode, ro_modifier); | |
dd27116b RK |
5381 | return const0_rtx; |
5382 | } | |
5383 | else if ((code == TRUTH_ANDIF_EXPR || code == TRUTH_ORIF_EXPR) | |
5384 | && ! TREE_SIDE_EFFECTS (TREE_OPERAND (exp, 1))) | |
5385 | /* If the second operand has no side effects, just evaluate | |
0f41302f | 5386 | the first. */ |
dd27116b | 5387 | return expand_expr (TREE_OPERAND (exp, 0), const0_rtx, |
921b3427 | 5388 | VOIDmode, ro_modifier); |
dd27116b | 5389 | |
90764a87 | 5390 | target = 0; |
dd27116b | 5391 | } |
bbf6f052 | 5392 | |
dbecbbe4 | 5393 | #ifdef MAX_INTEGER_COMPUTATION_MODE |
ce3c0b53 JL |
5394 | if (target |
5395 | && TREE_CODE (exp) != INTEGER_CST | |
5396 | && TREE_CODE (exp) != PARM_DECL | |
ee06cc21 JL |
5397 | && TREE_CODE (exp) != ARRAY_REF |
5398 | && TREE_CODE (exp) != COMPONENT_REF | |
5399 | && TREE_CODE (exp) != BIT_FIELD_REF | |
5400 | && TREE_CODE (exp) != INDIRECT_REF | |
ce3c0b53 | 5401 | && TREE_CODE (exp) != VAR_DECL) |
dbecbbe4 JL |
5402 | { |
5403 | enum machine_mode mode = GET_MODE (target); | |
5404 | ||
5405 | if (GET_MODE_CLASS (mode) == MODE_INT | |
5406 | && mode > MAX_INTEGER_COMPUTATION_MODE) | |
5407 | fatal ("unsupported wide integer operation"); | |
5408 | } | |
5409 | ||
71bca506 | 5410 | if (TREE_CODE (exp) != INTEGER_CST |
ce3c0b53 | 5411 | && TREE_CODE (exp) != PARM_DECL |
ee06cc21 JL |
5412 | && TREE_CODE (exp) != ARRAY_REF |
5413 | && TREE_CODE (exp) != COMPONENT_REF | |
5414 | && TREE_CODE (exp) != BIT_FIELD_REF | |
5415 | && TREE_CODE (exp) != INDIRECT_REF | |
ce3c0b53 | 5416 | && TREE_CODE (exp) != VAR_DECL |
71bca506 | 5417 | && GET_MODE_CLASS (tmode) == MODE_INT |
dbecbbe4 JL |
5418 | && tmode > MAX_INTEGER_COMPUTATION_MODE) |
5419 | fatal ("unsupported wide integer operation"); | |
5420 | ||
5421 | check_max_integer_computation_mode (exp); | |
5422 | #endif | |
5423 | ||
e44842fe RK |
5424 | /* If will do cse, generate all results into pseudo registers |
5425 | since 1) that allows cse to find more things | |
5426 | and 2) otherwise cse could produce an insn the machine | |
5427 | cannot support. */ | |
5428 | ||
bbf6f052 RK |
5429 | if (! cse_not_expected && mode != BLKmode && target |
5430 | && (GET_CODE (target) != REG || REGNO (target) < FIRST_PSEUDO_REGISTER)) | |
5431 | target = subtarget; | |
5432 | ||
bbf6f052 RK |
5433 | switch (code) |
5434 | { | |
5435 | case LABEL_DECL: | |
b552441b RS |
5436 | { |
5437 | tree function = decl_function_context (exp); | |
5438 | /* Handle using a label in a containing function. */ | |
d0977240 RK |
5439 | if (function != current_function_decl |
5440 | && function != inline_function_decl && function != 0) | |
b552441b RS |
5441 | { |
5442 | struct function *p = find_function_data (function); | |
5443 | /* Allocate in the memory associated with the function | |
5444 | that the label is in. */ | |
5445 | push_obstacks (p->function_obstack, | |
5446 | p->function_maybepermanent_obstack); | |
5447 | ||
38a448ca RH |
5448 | p->forced_labels = gen_rtx_EXPR_LIST (VOIDmode, |
5449 | label_rtx (exp), | |
5450 | p->forced_labels); | |
b552441b RS |
5451 | pop_obstacks (); |
5452 | } | |
5453 | else if (modifier == EXPAND_INITIALIZER) | |
38a448ca RH |
5454 | forced_labels = gen_rtx_EXPR_LIST (VOIDmode, |
5455 | label_rtx (exp), forced_labels); | |
5456 | temp = gen_rtx_MEM (FUNCTION_MODE, | |
5457 | gen_rtx_LABEL_REF (Pmode, label_rtx (exp))); | |
d0977240 RK |
5458 | if (function != current_function_decl |
5459 | && function != inline_function_decl && function != 0) | |
26fcb35a RS |
5460 | LABEL_REF_NONLOCAL_P (XEXP (temp, 0)) = 1; |
5461 | return temp; | |
b552441b | 5462 | } |
bbf6f052 RK |
5463 | |
5464 | case PARM_DECL: | |
5465 | if (DECL_RTL (exp) == 0) | |
5466 | { | |
5467 | error_with_decl (exp, "prior parameter's size depends on `%s'"); | |
4af3895e | 5468 | return CONST0_RTX (mode); |
bbf6f052 RK |
5469 | } |
5470 | ||
0f41302f | 5471 | /* ... fall through ... */ |
d6a5ac33 | 5472 | |
bbf6f052 | 5473 | case VAR_DECL: |
2dca20cd RS |
5474 | /* If a static var's type was incomplete when the decl was written, |
5475 | but the type is complete now, lay out the decl now. */ | |
5476 | if (DECL_SIZE (exp) == 0 && TYPE_SIZE (TREE_TYPE (exp)) != 0 | |
5477 | && (TREE_STATIC (exp) || DECL_EXTERNAL (exp))) | |
5478 | { | |
5479 | push_obstacks_nochange (); | |
5480 | end_temporary_allocation (); | |
5481 | layout_decl (exp, 0); | |
5482 | PUT_MODE (DECL_RTL (exp), DECL_MODE (exp)); | |
5483 | pop_obstacks (); | |
5484 | } | |
d6a5ac33 | 5485 | |
921b3427 RK |
5486 | /* Only check automatic variables. Currently, function arguments are |
5487 | not checked (this can be done at compile-time with prototypes). | |
5488 | Aggregates are not checked. */ | |
5489 | if (flag_check_memory_usage && code == VAR_DECL | |
5490 | && GET_CODE (DECL_RTL (exp)) == MEM | |
5491 | && DECL_CONTEXT (exp) != NULL_TREE | |
5492 | && ! TREE_STATIC (exp) | |
5493 | && ! AGGREGATE_TYPE_P (TREE_TYPE (exp))) | |
5494 | { | |
5495 | enum memory_use_mode memory_usage; | |
5496 | memory_usage = get_memory_usage_from_modifier (modifier); | |
5497 | ||
5498 | if (memory_usage != MEMORY_USE_DONT) | |
5499 | emit_library_call (chkr_check_addr_libfunc, 1, VOIDmode, 3, | |
5500 | XEXP (DECL_RTL (exp), 0), ptr_mode, | |
5501 | GEN_INT (int_size_in_bytes (type)), | |
5502 | TYPE_MODE (sizetype), | |
956d6950 JL |
5503 | GEN_INT (memory_usage), |
5504 | TYPE_MODE (integer_type_node)); | |
921b3427 RK |
5505 | } |
5506 | ||
0f41302f | 5507 | /* ... fall through ... */ |
d6a5ac33 | 5508 | |
2dca20cd | 5509 | case FUNCTION_DECL: |
bbf6f052 RK |
5510 | case RESULT_DECL: |
5511 | if (DECL_RTL (exp) == 0) | |
5512 | abort (); | |
d6a5ac33 | 5513 | |
e44842fe RK |
5514 | /* Ensure variable marked as used even if it doesn't go through |
5515 | a parser. If it hasn't be used yet, write out an external | |
5516 | definition. */ | |
5517 | if (! TREE_USED (exp)) | |
5518 | { | |
5519 | assemble_external (exp); | |
5520 | TREE_USED (exp) = 1; | |
5521 | } | |
5522 | ||
dc6d66b3 RK |
5523 | /* Show we haven't gotten RTL for this yet. */ |
5524 | temp = 0; | |
5525 | ||
bbf6f052 RK |
5526 | /* Handle variables inherited from containing functions. */ |
5527 | context = decl_function_context (exp); | |
5528 | ||
5529 | /* We treat inline_function_decl as an alias for the current function | |
5530 | because that is the inline function whose vars, types, etc. | |
5531 | are being merged into the current function. | |
5532 | See expand_inline_function. */ | |
d6a5ac33 | 5533 | |
bbf6f052 RK |
5534 | if (context != 0 && context != current_function_decl |
5535 | && context != inline_function_decl | |
5536 | /* If var is static, we don't need a static chain to access it. */ | |
5537 | && ! (GET_CODE (DECL_RTL (exp)) == MEM | |
5538 | && CONSTANT_P (XEXP (DECL_RTL (exp), 0)))) | |
5539 | { | |
5540 | rtx addr; | |
5541 | ||
5542 | /* Mark as non-local and addressable. */ | |
81feeecb | 5543 | DECL_NONLOCAL (exp) = 1; |
38ee6ed9 JM |
5544 | if (DECL_NO_STATIC_CHAIN (current_function_decl)) |
5545 | abort (); | |
bbf6f052 RK |
5546 | mark_addressable (exp); |
5547 | if (GET_CODE (DECL_RTL (exp)) != MEM) | |
5548 | abort (); | |
5549 | addr = XEXP (DECL_RTL (exp), 0); | |
5550 | if (GET_CODE (addr) == MEM) | |
38a448ca RH |
5551 | addr = gen_rtx_MEM (Pmode, |
5552 | fix_lexical_addr (XEXP (addr, 0), exp)); | |
bbf6f052 RK |
5553 | else |
5554 | addr = fix_lexical_addr (addr, exp); | |
dc6d66b3 | 5555 | temp = change_address (DECL_RTL (exp), mode, addr); |
bbf6f052 | 5556 | } |
4af3895e | 5557 | |
bbf6f052 RK |
5558 | /* This is the case of an array whose size is to be determined |
5559 | from its initializer, while the initializer is still being parsed. | |
5560 | See expand_decl. */ | |
d6a5ac33 | 5561 | |
dc6d66b3 RK |
5562 | else if (GET_CODE (DECL_RTL (exp)) == MEM |
5563 | && GET_CODE (XEXP (DECL_RTL (exp), 0)) == REG) | |
5564 | temp = change_address (DECL_RTL (exp), GET_MODE (DECL_RTL (exp)), | |
bbf6f052 | 5565 | XEXP (DECL_RTL (exp), 0)); |
d6a5ac33 RK |
5566 | |
5567 | /* If DECL_RTL is memory, we are in the normal case and either | |
5568 | the address is not valid or it is not a register and -fforce-addr | |
5569 | is specified, get the address into a register. */ | |
5570 | ||
dc6d66b3 RK |
5571 | else if (GET_CODE (DECL_RTL (exp)) == MEM |
5572 | && modifier != EXPAND_CONST_ADDRESS | |
5573 | && modifier != EXPAND_SUM | |
5574 | && modifier != EXPAND_INITIALIZER | |
5575 | && (! memory_address_p (DECL_MODE (exp), | |
5576 | XEXP (DECL_RTL (exp), 0)) | |
5577 | || (flag_force_addr | |
5578 | && GET_CODE (XEXP (DECL_RTL (exp), 0)) != REG))) | |
5579 | temp = change_address (DECL_RTL (exp), VOIDmode, | |
d6a5ac33 | 5580 | copy_rtx (XEXP (DECL_RTL (exp), 0))); |
1499e0a8 | 5581 | |
dc6d66b3 RK |
5582 | /* If we got something, return it. But first, set the alignment |
5583 | the address is a register. */ | |
5584 | if (temp != 0) | |
5585 | { | |
5586 | if (GET_CODE (temp) == MEM && GET_CODE (XEXP (temp, 0)) == REG) | |
5587 | mark_reg_pointer (XEXP (temp, 0), | |
5588 | DECL_ALIGN (exp) / BITS_PER_UNIT); | |
5589 | ||
5590 | return temp; | |
5591 | } | |
5592 | ||
1499e0a8 RK |
5593 | /* If the mode of DECL_RTL does not match that of the decl, it |
5594 | must be a promoted value. We return a SUBREG of the wanted mode, | |
5595 | but mark it so that we know that it was already extended. */ | |
5596 | ||
5597 | if (GET_CODE (DECL_RTL (exp)) == REG | |
5598 | && GET_MODE (DECL_RTL (exp)) != mode) | |
5599 | { | |
1499e0a8 RK |
5600 | /* Get the signedness used for this variable. Ensure we get the |
5601 | same mode we got when the variable was declared. */ | |
78911e8b RK |
5602 | if (GET_MODE (DECL_RTL (exp)) |
5603 | != promote_mode (type, DECL_MODE (exp), &unsignedp, 0)) | |
1499e0a8 RK |
5604 | abort (); |
5605 | ||
38a448ca | 5606 | temp = gen_rtx_SUBREG (mode, DECL_RTL (exp), 0); |
1499e0a8 RK |
5607 | SUBREG_PROMOTED_VAR_P (temp) = 1; |
5608 | SUBREG_PROMOTED_UNSIGNED_P (temp) = unsignedp; | |
5609 | return temp; | |
5610 | } | |
5611 | ||
bbf6f052 RK |
5612 | return DECL_RTL (exp); |
5613 | ||
5614 | case INTEGER_CST: | |
5615 | return immed_double_const (TREE_INT_CST_LOW (exp), | |
5616 | TREE_INT_CST_HIGH (exp), | |
5617 | mode); | |
5618 | ||
5619 | case CONST_DECL: | |
921b3427 RK |
5620 | return expand_expr (DECL_INITIAL (exp), target, VOIDmode, |
5621 | EXPAND_MEMORY_USE_BAD); | |
bbf6f052 RK |
5622 | |
5623 | case REAL_CST: | |
5624 | /* If optimized, generate immediate CONST_DOUBLE | |
5625 | which will be turned into memory by reload if necessary. | |
5626 | ||
5627 | We used to force a register so that loop.c could see it. But | |
5628 | this does not allow gen_* patterns to perform optimizations with | |
5629 | the constants. It also produces two insns in cases like "x = 1.0;". | |
5630 | On most machines, floating-point constants are not permitted in | |
5631 | many insns, so we'd end up copying it to a register in any case. | |
5632 | ||
5633 | Now, we do the copying in expand_binop, if appropriate. */ | |
5634 | return immed_real_const (exp); | |
5635 | ||
5636 | case COMPLEX_CST: | |
5637 | case STRING_CST: | |
5638 | if (! TREE_CST_RTL (exp)) | |
5639 | output_constant_def (exp); | |
5640 | ||
5641 | /* TREE_CST_RTL probably contains a constant address. | |
5642 | On RISC machines where a constant address isn't valid, | |
5643 | make some insns to get that address into a register. */ | |
5644 | if (GET_CODE (TREE_CST_RTL (exp)) == MEM | |
5645 | && modifier != EXPAND_CONST_ADDRESS | |
5646 | && modifier != EXPAND_INITIALIZER | |
5647 | && modifier != EXPAND_SUM | |
d6a5ac33 RK |
5648 | && (! memory_address_p (mode, XEXP (TREE_CST_RTL (exp), 0)) |
5649 | || (flag_force_addr | |
5650 | && GET_CODE (XEXP (TREE_CST_RTL (exp), 0)) != REG))) | |
bbf6f052 RK |
5651 | return change_address (TREE_CST_RTL (exp), VOIDmode, |
5652 | copy_rtx (XEXP (TREE_CST_RTL (exp), 0))); | |
5653 | return TREE_CST_RTL (exp); | |
5654 | ||
bf1e5319 | 5655 | case EXPR_WITH_FILE_LOCATION: |
b24f65cd APB |
5656 | { |
5657 | rtx to_return; | |
5658 | char *saved_input_filename = input_filename; | |
5659 | int saved_lineno = lineno; | |
5660 | input_filename = EXPR_WFL_FILENAME (exp); | |
5661 | lineno = EXPR_WFL_LINENO (exp); | |
5662 | if (EXPR_WFL_EMIT_LINE_NOTE (exp)) | |
5663 | emit_line_note (input_filename, lineno); | |
5664 | /* Possibly avoid switching back and force here */ | |
5665 | to_return = expand_expr (EXPR_WFL_NODE (exp), target, tmode, modifier); | |
5666 | input_filename = saved_input_filename; | |
5667 | lineno = saved_lineno; | |
5668 | return to_return; | |
5669 | } | |
bf1e5319 | 5670 | |
bbf6f052 RK |
5671 | case SAVE_EXPR: |
5672 | context = decl_function_context (exp); | |
d6a5ac33 | 5673 | |
d0977240 RK |
5674 | /* If this SAVE_EXPR was at global context, assume we are an |
5675 | initialization function and move it into our context. */ | |
5676 | if (context == 0) | |
5677 | SAVE_EXPR_CONTEXT (exp) = current_function_decl; | |
5678 | ||
bbf6f052 RK |
5679 | /* We treat inline_function_decl as an alias for the current function |
5680 | because that is the inline function whose vars, types, etc. | |
5681 | are being merged into the current function. | |
5682 | See expand_inline_function. */ | |
5683 | if (context == current_function_decl || context == inline_function_decl) | |
5684 | context = 0; | |
5685 | ||
5686 | /* If this is non-local, handle it. */ | |
5687 | if (context) | |
5688 | { | |
d0977240 RK |
5689 | /* The following call just exists to abort if the context is |
5690 | not of a containing function. */ | |
5691 | find_function_data (context); | |
5692 | ||
bbf6f052 RK |
5693 | temp = SAVE_EXPR_RTL (exp); |
5694 | if (temp && GET_CODE (temp) == REG) | |
5695 | { | |
5696 | put_var_into_stack (exp); | |
5697 | temp = SAVE_EXPR_RTL (exp); | |
5698 | } | |
5699 | if (temp == 0 || GET_CODE (temp) != MEM) | |
5700 | abort (); | |
5701 | return change_address (temp, mode, | |
5702 | fix_lexical_addr (XEXP (temp, 0), exp)); | |
5703 | } | |
5704 | if (SAVE_EXPR_RTL (exp) == 0) | |
5705 | { | |
06089a8b RK |
5706 | if (mode == VOIDmode) |
5707 | temp = const0_rtx; | |
5708 | else | |
e5e809f4 | 5709 | temp = assign_temp (type, 3, 0, 0); |
1499e0a8 | 5710 | |
bbf6f052 | 5711 | SAVE_EXPR_RTL (exp) = temp; |
bbf6f052 | 5712 | if (!optimize && GET_CODE (temp) == REG) |
38a448ca RH |
5713 | save_expr_regs = gen_rtx_EXPR_LIST (VOIDmode, temp, |
5714 | save_expr_regs); | |
ff78f773 RK |
5715 | |
5716 | /* If the mode of TEMP does not match that of the expression, it | |
5717 | must be a promoted value. We pass store_expr a SUBREG of the | |
5718 | wanted mode but mark it so that we know that it was already | |
5719 | extended. Note that `unsignedp' was modified above in | |
5720 | this case. */ | |
5721 | ||
5722 | if (GET_CODE (temp) == REG && GET_MODE (temp) != mode) | |
5723 | { | |
38a448ca | 5724 | temp = gen_rtx_SUBREG (mode, SAVE_EXPR_RTL (exp), 0); |
ff78f773 RK |
5725 | SUBREG_PROMOTED_VAR_P (temp) = 1; |
5726 | SUBREG_PROMOTED_UNSIGNED_P (temp) = unsignedp; | |
5727 | } | |
5728 | ||
4c7a0be9 | 5729 | if (temp == const0_rtx) |
921b3427 RK |
5730 | expand_expr (TREE_OPERAND (exp, 0), const0_rtx, VOIDmode, |
5731 | EXPAND_MEMORY_USE_BAD); | |
4c7a0be9 JW |
5732 | else |
5733 | store_expr (TREE_OPERAND (exp, 0), temp, 0); | |
e5e809f4 JL |
5734 | |
5735 | TREE_USED (exp) = 1; | |
bbf6f052 | 5736 | } |
1499e0a8 RK |
5737 | |
5738 | /* If the mode of SAVE_EXPR_RTL does not match that of the expression, it | |
5739 | must be a promoted value. We return a SUBREG of the wanted mode, | |
0f41302f | 5740 | but mark it so that we know that it was already extended. */ |
1499e0a8 RK |
5741 | |
5742 | if (GET_CODE (SAVE_EXPR_RTL (exp)) == REG | |
5743 | && GET_MODE (SAVE_EXPR_RTL (exp)) != mode) | |
5744 | { | |
e70d22c8 RK |
5745 | /* Compute the signedness and make the proper SUBREG. */ |
5746 | promote_mode (type, mode, &unsignedp, 0); | |
38a448ca | 5747 | temp = gen_rtx_SUBREG (mode, SAVE_EXPR_RTL (exp), 0); |
1499e0a8 RK |
5748 | SUBREG_PROMOTED_VAR_P (temp) = 1; |
5749 | SUBREG_PROMOTED_UNSIGNED_P (temp) = unsignedp; | |
5750 | return temp; | |
5751 | } | |
5752 | ||
bbf6f052 RK |
5753 | return SAVE_EXPR_RTL (exp); |
5754 | ||
679163cf MS |
5755 | case UNSAVE_EXPR: |
5756 | { | |
5757 | rtx temp; | |
5758 | temp = expand_expr (TREE_OPERAND (exp, 0), target, tmode, modifier); | |
5759 | TREE_OPERAND (exp, 0) = unsave_expr_now (TREE_OPERAND (exp, 0)); | |
5760 | return temp; | |
5761 | } | |
5762 | ||
b50d17a1 | 5763 | case PLACEHOLDER_EXPR: |
e9a25f70 JL |
5764 | { |
5765 | tree placeholder_expr; | |
5766 | ||
5767 | /* If there is an object on the head of the placeholder list, | |
e5e809f4 | 5768 | see if some object in it of type TYPE or a pointer to it. For |
e9a25f70 JL |
5769 | further information, see tree.def. */ |
5770 | for (placeholder_expr = placeholder_list; | |
5771 | placeholder_expr != 0; | |
5772 | placeholder_expr = TREE_CHAIN (placeholder_expr)) | |
5773 | { | |
5774 | tree need_type = TYPE_MAIN_VARIANT (type); | |
5775 | tree object = 0; | |
5776 | tree old_list = placeholder_list; | |
5777 | tree elt; | |
5778 | ||
e5e809f4 JL |
5779 | /* Find the outermost reference that is of the type we want. |
5780 | If none, see if any object has a type that is a pointer to | |
5781 | the type we want. */ | |
5782 | for (elt = TREE_PURPOSE (placeholder_expr); | |
5783 | elt != 0 && object == 0; | |
5784 | elt | |
5785 | = ((TREE_CODE (elt) == COMPOUND_EXPR | |
5786 | || TREE_CODE (elt) == COND_EXPR) | |
5787 | ? TREE_OPERAND (elt, 1) | |
5788 | : (TREE_CODE_CLASS (TREE_CODE (elt)) == 'r' | |
5789 | || TREE_CODE_CLASS (TREE_CODE (elt)) == '1' | |
5790 | || TREE_CODE_CLASS (TREE_CODE (elt)) == '2' | |
5791 | || TREE_CODE_CLASS (TREE_CODE (elt)) == 'e') | |
5792 | ? TREE_OPERAND (elt, 0) : 0)) | |
5793 | if (TYPE_MAIN_VARIANT (TREE_TYPE (elt)) == need_type) | |
5794 | object = elt; | |
e9a25f70 | 5795 | |
e9a25f70 | 5796 | for (elt = TREE_PURPOSE (placeholder_expr); |
e5e809f4 JL |
5797 | elt != 0 && object == 0; |
5798 | elt | |
5799 | = ((TREE_CODE (elt) == COMPOUND_EXPR | |
5800 | || TREE_CODE (elt) == COND_EXPR) | |
5801 | ? TREE_OPERAND (elt, 1) | |
5802 | : (TREE_CODE_CLASS (TREE_CODE (elt)) == 'r' | |
5803 | || TREE_CODE_CLASS (TREE_CODE (elt)) == '1' | |
5804 | || TREE_CODE_CLASS (TREE_CODE (elt)) == '2' | |
5805 | || TREE_CODE_CLASS (TREE_CODE (elt)) == 'e') | |
5806 | ? TREE_OPERAND (elt, 0) : 0)) | |
5807 | if (POINTER_TYPE_P (TREE_TYPE (elt)) | |
5808 | && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (elt))) | |
e9a25f70 | 5809 | == need_type)) |
e5e809f4 | 5810 | object = build1 (INDIRECT_REF, need_type, elt); |
dc500fa1 | 5811 | |
e9a25f70 | 5812 | if (object != 0) |
2cde2255 | 5813 | { |
e9a25f70 JL |
5814 | /* Expand this object skipping the list entries before |
5815 | it was found in case it is also a PLACEHOLDER_EXPR. | |
5816 | In that case, we want to translate it using subsequent | |
5817 | entries. */ | |
5818 | placeholder_list = TREE_CHAIN (placeholder_expr); | |
5819 | temp = expand_expr (object, original_target, tmode, | |
5820 | ro_modifier); | |
5821 | placeholder_list = old_list; | |
5822 | return temp; | |
2cde2255 | 5823 | } |
e9a25f70 JL |
5824 | } |
5825 | } | |
b50d17a1 RK |
5826 | |
5827 | /* We can't find the object or there was a missing WITH_RECORD_EXPR. */ | |
5828 | abort (); | |
5829 | ||
5830 | case WITH_RECORD_EXPR: | |
5831 | /* Put the object on the placeholder list, expand our first operand, | |
5832 | and pop the list. */ | |
5833 | placeholder_list = tree_cons (TREE_OPERAND (exp, 1), NULL_TREE, | |
5834 | placeholder_list); | |
5835 | target = expand_expr (TREE_OPERAND (exp, 0), original_target, | |
921b3427 | 5836 | tmode, ro_modifier); |
b50d17a1 RK |
5837 | placeholder_list = TREE_CHAIN (placeholder_list); |
5838 | return target; | |
5839 | ||
bbf6f052 | 5840 | case EXIT_EXPR: |
e44842fe RK |
5841 | expand_exit_loop_if_false (NULL_PTR, |
5842 | invert_truthvalue (TREE_OPERAND (exp, 0))); | |
bbf6f052 RK |
5843 | return const0_rtx; |
5844 | ||
f42e28dd APB |
5845 | case LABELED_BLOCK_EXPR: |
5846 | if (LABELED_BLOCK_BODY (exp)) | |
5847 | expand_expr_stmt (LABELED_BLOCK_BODY (exp)); | |
5848 | emit_label (label_rtx (LABELED_BLOCK_LABEL (exp))); | |
5849 | return const0_rtx; | |
5850 | ||
5851 | case EXIT_BLOCK_EXPR: | |
5852 | if (EXIT_BLOCK_RETURN (exp)) | |
5853 | really_sorry ("returned value in block_exit_expr"); | |
5854 | expand_goto (LABELED_BLOCK_LABEL (EXIT_BLOCK_LABELED_BLOCK (exp))); | |
5855 | return const0_rtx; | |
5856 | ||
bbf6f052 | 5857 | case LOOP_EXPR: |
0088fcb1 | 5858 | push_temp_slots (); |
bbf6f052 RK |
5859 | expand_start_loop (1); |
5860 | expand_expr_stmt (TREE_OPERAND (exp, 0)); | |
5861 | expand_end_loop (); | |
0088fcb1 | 5862 | pop_temp_slots (); |
bbf6f052 RK |
5863 | |
5864 | return const0_rtx; | |
5865 | ||
5866 | case BIND_EXPR: | |
5867 | { | |
5868 | tree vars = TREE_OPERAND (exp, 0); | |
5869 | int vars_need_expansion = 0; | |
5870 | ||
5871 | /* Need to open a binding contour here because | |
e976b8b2 | 5872 | if there are any cleanups they must be contained here. */ |
bbf6f052 RK |
5873 | expand_start_bindings (0); |
5874 | ||
2df53c0b RS |
5875 | /* Mark the corresponding BLOCK for output in its proper place. */ |
5876 | if (TREE_OPERAND (exp, 2) != 0 | |
5877 | && ! TREE_USED (TREE_OPERAND (exp, 2))) | |
5878 | insert_block (TREE_OPERAND (exp, 2)); | |
bbf6f052 RK |
5879 | |
5880 | /* If VARS have not yet been expanded, expand them now. */ | |
5881 | while (vars) | |
5882 | { | |
5883 | if (DECL_RTL (vars) == 0) | |
5884 | { | |
5885 | vars_need_expansion = 1; | |
5886 | expand_decl (vars); | |
5887 | } | |
5888 | expand_decl_init (vars); | |
5889 | vars = TREE_CHAIN (vars); | |
5890 | } | |
5891 | ||
921b3427 | 5892 | temp = expand_expr (TREE_OPERAND (exp, 1), target, tmode, ro_modifier); |
bbf6f052 RK |
5893 | |
5894 | expand_end_bindings (TREE_OPERAND (exp, 0), 0, 0); | |
5895 | ||
5896 | return temp; | |
5897 | } | |
5898 | ||
5899 | case RTL_EXPR: | |
83b853c9 JM |
5900 | if (RTL_EXPR_SEQUENCE (exp)) |
5901 | { | |
5902 | if (RTL_EXPR_SEQUENCE (exp) == const0_rtx) | |
5903 | abort (); | |
5904 | emit_insns (RTL_EXPR_SEQUENCE (exp)); | |
5905 | RTL_EXPR_SEQUENCE (exp) = const0_rtx; | |
5906 | } | |
99310285 | 5907 | preserve_rtl_expr_result (RTL_EXPR_RTL (exp)); |
ca814259 | 5908 | free_temps_for_rtl_expr (exp); |
bbf6f052 RK |
5909 | return RTL_EXPR_RTL (exp); |
5910 | ||
5911 | case CONSTRUCTOR: | |
dd27116b RK |
5912 | /* If we don't need the result, just ensure we evaluate any |
5913 | subexpressions. */ | |
5914 | if (ignore) | |
5915 | { | |
5916 | tree elt; | |
5917 | for (elt = CONSTRUCTOR_ELTS (exp); elt; elt = TREE_CHAIN (elt)) | |
921b3427 RK |
5918 | expand_expr (TREE_VALUE (elt), const0_rtx, VOIDmode, |
5919 | EXPAND_MEMORY_USE_BAD); | |
dd27116b RK |
5920 | return const0_rtx; |
5921 | } | |
3207b172 | 5922 | |
4af3895e JVA |
5923 | /* All elts simple constants => refer to a constant in memory. But |
5924 | if this is a non-BLKmode mode, let it store a field at a time | |
5925 | since that should make a CONST_INT or CONST_DOUBLE when we | |
3207b172 | 5926 | fold. Likewise, if we have a target we can use, it is best to |
d720b9d1 RK |
5927 | store directly into the target unless the type is large enough |
5928 | that memcpy will be used. If we are making an initializer and | |
3207b172 | 5929 | all operands are constant, put it in memory as well. */ |
dd27116b | 5930 | else if ((TREE_STATIC (exp) |
3207b172 | 5931 | && ((mode == BLKmode |
e5e809f4 | 5932 | && ! (target != 0 && safe_from_p (target, exp, 1))) |
d720b9d1 RK |
5933 | || TREE_ADDRESSABLE (exp) |
5934 | || (TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST | |
5935 | && (move_by_pieces_ninsns | |
67225c15 RK |
5936 | (TREE_INT_CST_LOW (TYPE_SIZE (type))/BITS_PER_UNIT, |
5937 | TYPE_ALIGN (type) / BITS_PER_UNIT) | |
9862dea9 | 5938 | >= MOVE_RATIO) |
9de08200 | 5939 | && ! mostly_zeros_p (exp)))) |
dd27116b | 5940 | || (modifier == EXPAND_INITIALIZER && TREE_CONSTANT (exp))) |
bbf6f052 RK |
5941 | { |
5942 | rtx constructor = output_constant_def (exp); | |
b552441b RS |
5943 | if (modifier != EXPAND_CONST_ADDRESS |
5944 | && modifier != EXPAND_INITIALIZER | |
5945 | && modifier != EXPAND_SUM | |
d6a5ac33 RK |
5946 | && (! memory_address_p (GET_MODE (constructor), |
5947 | XEXP (constructor, 0)) | |
5948 | || (flag_force_addr | |
5949 | && GET_CODE (XEXP (constructor, 0)) != REG))) | |
bbf6f052 RK |
5950 | constructor = change_address (constructor, VOIDmode, |
5951 | XEXP (constructor, 0)); | |
5952 | return constructor; | |
5953 | } | |
5954 | ||
bbf6f052 RK |
5955 | else |
5956 | { | |
e9ac02a6 JW |
5957 | /* Handle calls that pass values in multiple non-contiguous |
5958 | locations. The Irix 6 ABI has examples of this. */ | |
e5e809f4 | 5959 | if (target == 0 || ! safe_from_p (target, exp, 1) |
e9ac02a6 | 5960 | || GET_CODE (target) == PARALLEL) |
06089a8b RK |
5961 | { |
5962 | if (mode != BLKmode && ! TREE_ADDRESSABLE (exp)) | |
5963 | target = gen_reg_rtx (tmode != VOIDmode ? tmode : mode); | |
5964 | else | |
5965 | target = assign_temp (type, 0, 1, 1); | |
5966 | } | |
07604beb RK |
5967 | |
5968 | if (TREE_READONLY (exp)) | |
5969 | { | |
9151b3bf | 5970 | if (GET_CODE (target) == MEM) |
effbcc6a RK |
5971 | target = copy_rtx (target); |
5972 | ||
07604beb RK |
5973 | RTX_UNCHANGING_P (target) = 1; |
5974 | } | |
5975 | ||
e1a43f73 | 5976 | store_constructor (exp, target, 0); |
bbf6f052 RK |
5977 | return target; |
5978 | } | |
5979 | ||
5980 | case INDIRECT_REF: | |
5981 | { | |
5982 | tree exp1 = TREE_OPERAND (exp, 0); | |
5983 | tree exp2; | |
7581a30f JW |
5984 | tree index; |
5985 | tree string = string_constant (exp1, &index); | |
5986 | int i; | |
5987 | ||
06eaa86f | 5988 | /* Try to optimize reads from const strings. */ |
7581a30f JW |
5989 | if (string |
5990 | && TREE_CODE (string) == STRING_CST | |
5991 | && TREE_CODE (index) == INTEGER_CST | |
5992 | && !TREE_INT_CST_HIGH (index) | |
5993 | && (i = TREE_INT_CST_LOW (index)) < TREE_STRING_LENGTH (string) | |
5994 | && GET_MODE_CLASS (mode) == MODE_INT | |
06eaa86f JW |
5995 | && GET_MODE_SIZE (mode) == 1 |
5996 | && modifier != EXPAND_MEMORY_USE_WO) | |
7581a30f | 5997 | return GEN_INT (TREE_STRING_POINTER (string)[i]); |
bbf6f052 | 5998 | |
405f0da6 JW |
5999 | op0 = expand_expr (exp1, NULL_RTX, VOIDmode, EXPAND_SUM); |
6000 | op0 = memory_address (mode, op0); | |
8c8a8e34 | 6001 | |
921b3427 RK |
6002 | if (flag_check_memory_usage && !AGGREGATE_TYPE_P (TREE_TYPE (exp))) |
6003 | { | |
6004 | enum memory_use_mode memory_usage; | |
6005 | memory_usage = get_memory_usage_from_modifier (modifier); | |
6006 | ||
6007 | if (memory_usage != MEMORY_USE_DONT) | |
c85f7c16 JL |
6008 | { |
6009 | in_check_memory_usage = 1; | |
6010 | emit_library_call (chkr_check_addr_libfunc, 1, VOIDmode, 3, | |
6011 | op0, ptr_mode, | |
6012 | GEN_INT (int_size_in_bytes (type)), | |
6013 | TYPE_MODE (sizetype), | |
6014 | GEN_INT (memory_usage), | |
6015 | TYPE_MODE (integer_type_node)); | |
6016 | in_check_memory_usage = 0; | |
6017 | } | |
921b3427 RK |
6018 | } |
6019 | ||
38a448ca | 6020 | temp = gen_rtx_MEM (mode, op0); |
8c8a8e34 JW |
6021 | /* If address was computed by addition, |
6022 | mark this as an element of an aggregate. */ | |
9ec36da5 JL |
6023 | if (TREE_CODE (exp1) == PLUS_EXPR |
6024 | || (TREE_CODE (exp1) == SAVE_EXPR | |
6025 | && TREE_CODE (TREE_OPERAND (exp1, 0)) == PLUS_EXPR) | |
05e3bdb9 | 6026 | || AGGREGATE_TYPE_P (TREE_TYPE (exp)) |
8c8a8e34 JW |
6027 | || (TREE_CODE (exp1) == ADDR_EXPR |
6028 | && (exp2 = TREE_OPERAND (exp1, 0)) | |
b5f88157 | 6029 | && AGGREGATE_TYPE_P (TREE_TYPE (exp2)))) |
8c8a8e34 | 6030 | MEM_IN_STRUCT_P (temp) = 1; |
b5f88157 JL |
6031 | |
6032 | /* If the pointer is actually a REFERENCE_TYPE, this could be pointing | |
6033 | into some aggregate too. In theory we could fold this into the | |
6034 | previous check and use rtx_addr_varies_p there too. | |
6035 | ||
6036 | However, this seems safer. */ | |
6037 | if (!MEM_IN_STRUCT_P (temp) | |
6038 | && (TREE_CODE (TREE_TYPE (exp1)) == REFERENCE_TYPE | |
6039 | /* This may have been an array reference to the first element | |
6040 | that was optimized away from being an addition. */ | |
6041 | || (TREE_CODE (exp1) == NOP_EXPR | |
6042 | && ((TREE_CODE (TREE_TYPE (TREE_OPERAND (exp1, 0))) | |
6043 | == REFERENCE_TYPE) | |
6044 | || ((TREE_CODE (TREE_TYPE (TREE_OPERAND (exp1, 0))) | |
6045 | == POINTER_TYPE) | |
6046 | && (AGGREGATE_TYPE_P | |
6047 | (TREE_TYPE (TREE_TYPE | |
6048 | (TREE_OPERAND (exp1, 0)))))))))) | |
6049 | MEM_IN_STRUCT_P (temp) = ! rtx_addr_varies_p (temp); | |
6050 | ||
2c4c436a | 6051 | MEM_VOLATILE_P (temp) = TREE_THIS_VOLATILE (exp) | flag_volatile; |
41472af8 | 6052 | MEM_ALIAS_SET (temp) = get_alias_set (exp); |
1125706f RK |
6053 | |
6054 | /* It is incorrect to set RTX_UNCHANGING_P from TREE_READONLY | |
6055 | here, because, in C and C++, the fact that a location is accessed | |
6056 | through a pointer to const does not mean that the value there can | |
6057 | never change. Languages where it can never change should | |
6058 | also set TREE_STATIC. */ | |
5cb7a25a | 6059 | RTX_UNCHANGING_P (temp) = TREE_READONLY (exp) & TREE_STATIC (exp); |
8c8a8e34 JW |
6060 | return temp; |
6061 | } | |
bbf6f052 RK |
6062 | |
6063 | case ARRAY_REF: | |
742920c7 RK |
6064 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) != ARRAY_TYPE) |
6065 | abort (); | |
bbf6f052 | 6066 | |
bbf6f052 | 6067 | { |
742920c7 RK |
6068 | tree array = TREE_OPERAND (exp, 0); |
6069 | tree domain = TYPE_DOMAIN (TREE_TYPE (array)); | |
6070 | tree low_bound = domain ? TYPE_MIN_VALUE (domain) : integer_zero_node; | |
6071 | tree index = TREE_OPERAND (exp, 1); | |
6072 | tree index_type = TREE_TYPE (index); | |
08293add | 6073 | HOST_WIDE_INT i; |
b50d17a1 | 6074 | |
d4c89139 PB |
6075 | /* Optimize the special-case of a zero lower bound. |
6076 | ||
6077 | We convert the low_bound to sizetype to avoid some problems | |
6078 | with constant folding. (E.g. suppose the lower bound is 1, | |
6079 | and its mode is QI. Without the conversion, (ARRAY | |
6080 | +(INDEX-(unsigned char)1)) becomes ((ARRAY+(-(unsigned char)1)) | |
6081 | +INDEX), which becomes (ARRAY+255+INDEX). Oops!) | |
6082 | ||
6083 | But sizetype isn't quite right either (especially if | |
6084 | the lowbound is negative). FIXME */ | |
6085 | ||
742920c7 | 6086 | if (! integer_zerop (low_bound)) |
d4c89139 PB |
6087 | index = fold (build (MINUS_EXPR, index_type, index, |
6088 | convert (sizetype, low_bound))); | |
742920c7 | 6089 | |
742920c7 | 6090 | /* Fold an expression like: "foo"[2]. |
ad2e7dd0 RK |
6091 | This is not done in fold so it won't happen inside &. |
6092 | Don't fold if this is for wide characters since it's too | |
6093 | difficult to do correctly and this is a very rare case. */ | |
742920c7 RK |
6094 | |
6095 | if (TREE_CODE (array) == STRING_CST | |
6096 | && TREE_CODE (index) == INTEGER_CST | |
6097 | && !TREE_INT_CST_HIGH (index) | |
307b821c | 6098 | && (i = TREE_INT_CST_LOW (index)) < TREE_STRING_LENGTH (array) |
ad2e7dd0 RK |
6099 | && GET_MODE_CLASS (mode) == MODE_INT |
6100 | && GET_MODE_SIZE (mode) == 1) | |
307b821c | 6101 | return GEN_INT (TREE_STRING_POINTER (array)[i]); |
bbf6f052 | 6102 | |
742920c7 RK |
6103 | /* If this is a constant index into a constant array, |
6104 | just get the value from the array. Handle both the cases when | |
6105 | we have an explicit constructor and when our operand is a variable | |
6106 | that was declared const. */ | |
4af3895e | 6107 | |
742920c7 RK |
6108 | if (TREE_CODE (array) == CONSTRUCTOR && ! TREE_SIDE_EFFECTS (array)) |
6109 | { | |
6110 | if (TREE_CODE (index) == INTEGER_CST | |
6111 | && TREE_INT_CST_HIGH (index) == 0) | |
6112 | { | |
6113 | tree elem = CONSTRUCTOR_ELTS (TREE_OPERAND (exp, 0)); | |
6114 | ||
6115 | i = TREE_INT_CST_LOW (index); | |
6116 | while (elem && i--) | |
6117 | elem = TREE_CHAIN (elem); | |
6118 | if (elem) | |
6119 | return expand_expr (fold (TREE_VALUE (elem)), target, | |
921b3427 | 6120 | tmode, ro_modifier); |
742920c7 RK |
6121 | } |
6122 | } | |
4af3895e | 6123 | |
742920c7 RK |
6124 | else if (optimize >= 1 |
6125 | && TREE_READONLY (array) && ! TREE_SIDE_EFFECTS (array) | |
6126 | && TREE_CODE (array) == VAR_DECL && DECL_INITIAL (array) | |
6127 | && TREE_CODE (DECL_INITIAL (array)) != ERROR_MARK) | |
6128 | { | |
08293add | 6129 | if (TREE_CODE (index) == INTEGER_CST) |
742920c7 RK |
6130 | { |
6131 | tree init = DECL_INITIAL (array); | |
6132 | ||
6133 | i = TREE_INT_CST_LOW (index); | |
6134 | if (TREE_CODE (init) == CONSTRUCTOR) | |
6135 | { | |
6136 | tree elem = CONSTRUCTOR_ELTS (init); | |
6137 | ||
03dc44a6 RS |
6138 | while (elem |
6139 | && !tree_int_cst_equal (TREE_PURPOSE (elem), index)) | |
742920c7 RK |
6140 | elem = TREE_CHAIN (elem); |
6141 | if (elem) | |
6142 | return expand_expr (fold (TREE_VALUE (elem)), target, | |
921b3427 | 6143 | tmode, ro_modifier); |
742920c7 RK |
6144 | } |
6145 | else if (TREE_CODE (init) == STRING_CST | |
08293add RK |
6146 | && TREE_INT_CST_HIGH (index) == 0 |
6147 | && (TREE_INT_CST_LOW (index) | |
6148 | < TREE_STRING_LENGTH (init))) | |
6149 | return (GEN_INT | |
6150 | (TREE_STRING_POINTER | |
6151 | (init)[TREE_INT_CST_LOW (index)])); | |
742920c7 RK |
6152 | } |
6153 | } | |
6154 | } | |
8c8a8e34 | 6155 | |
08293add | 6156 | /* ... fall through ... */ |
bbf6f052 RK |
6157 | |
6158 | case COMPONENT_REF: | |
6159 | case BIT_FIELD_REF: | |
4af3895e | 6160 | /* If the operand is a CONSTRUCTOR, we can just extract the |
7a0b7b9a RK |
6161 | appropriate field if it is present. Don't do this if we have |
6162 | already written the data since we want to refer to that copy | |
6163 | and varasm.c assumes that's what we'll do. */ | |
4af3895e | 6164 | if (code != ARRAY_REF |
7a0b7b9a RK |
6165 | && TREE_CODE (TREE_OPERAND (exp, 0)) == CONSTRUCTOR |
6166 | && TREE_CST_RTL (TREE_OPERAND (exp, 0)) == 0) | |
4af3895e JVA |
6167 | { |
6168 | tree elt; | |
6169 | ||
6170 | for (elt = CONSTRUCTOR_ELTS (TREE_OPERAND (exp, 0)); elt; | |
6171 | elt = TREE_CHAIN (elt)) | |
86b5812c RK |
6172 | if (TREE_PURPOSE (elt) == TREE_OPERAND (exp, 1) |
6173 | /* We can normally use the value of the field in the | |
6174 | CONSTRUCTOR. However, if this is a bitfield in | |
6175 | an integral mode that we can fit in a HOST_WIDE_INT, | |
6176 | we must mask only the number of bits in the bitfield, | |
6177 | since this is done implicitly by the constructor. If | |
6178 | the bitfield does not meet either of those conditions, | |
6179 | we can't do this optimization. */ | |
6180 | && (! DECL_BIT_FIELD (TREE_PURPOSE (elt)) | |
6181 | || ((GET_MODE_CLASS (DECL_MODE (TREE_PURPOSE (elt))) | |
6182 | == MODE_INT) | |
6183 | && (GET_MODE_BITSIZE (DECL_MODE (TREE_PURPOSE (elt))) | |
6184 | <= HOST_BITS_PER_WIDE_INT)))) | |
6185 | { | |
6186 | op0 = expand_expr (TREE_VALUE (elt), target, tmode, modifier); | |
6187 | if (DECL_BIT_FIELD (TREE_PURPOSE (elt))) | |
6188 | { | |
6189 | int bitsize = DECL_FIELD_SIZE (TREE_PURPOSE (elt)); | |
86b5812c RK |
6190 | |
6191 | if (TREE_UNSIGNED (TREE_TYPE (TREE_PURPOSE (elt)))) | |
6192 | { | |
6193 | op1 = GEN_INT (((HOST_WIDE_INT) 1 << bitsize) - 1); | |
6194 | op0 = expand_and (op0, op1, target); | |
6195 | } | |
6196 | else | |
6197 | { | |
e5e809f4 JL |
6198 | enum machine_mode imode |
6199 | = TYPE_MODE (TREE_TYPE (TREE_PURPOSE (elt))); | |
86b5812c | 6200 | tree count |
e5e809f4 JL |
6201 | = build_int_2 (GET_MODE_BITSIZE (imode) - bitsize, |
6202 | 0); | |
86b5812c RK |
6203 | |
6204 | op0 = expand_shift (LSHIFT_EXPR, imode, op0, count, | |
6205 | target, 0); | |
6206 | op0 = expand_shift (RSHIFT_EXPR, imode, op0, count, | |
6207 | target, 0); | |
6208 | } | |
6209 | } | |
6210 | ||
6211 | return op0; | |
6212 | } | |
4af3895e JVA |
6213 | } |
6214 | ||
bbf6f052 RK |
6215 | { |
6216 | enum machine_mode mode1; | |
6217 | int bitsize; | |
6218 | int bitpos; | |
7bb0943f | 6219 | tree offset; |
bbf6f052 | 6220 | int volatilep = 0; |
034f9101 | 6221 | int alignment; |
839c4796 RK |
6222 | tree tem = get_inner_reference (exp, &bitsize, &bitpos, &offset, |
6223 | &mode1, &unsignedp, &volatilep, | |
6224 | &alignment); | |
bbf6f052 | 6225 | |
e7f3c83f RK |
6226 | /* If we got back the original object, something is wrong. Perhaps |
6227 | we are evaluating an expression too early. In any event, don't | |
6228 | infinitely recurse. */ | |
6229 | if (tem == exp) | |
6230 | abort (); | |
6231 | ||
3d27140a | 6232 | /* If TEM's type is a union of variable size, pass TARGET to the inner |
b74f5ff2 RK |
6233 | computation, since it will need a temporary and TARGET is known |
6234 | to have to do. This occurs in unchecked conversion in Ada. */ | |
6235 | ||
6236 | op0 = expand_expr (tem, | |
6237 | (TREE_CODE (TREE_TYPE (tem)) == UNION_TYPE | |
6238 | && (TREE_CODE (TYPE_SIZE (TREE_TYPE (tem))) | |
6239 | != INTEGER_CST) | |
6240 | ? target : NULL_RTX), | |
4ed67205 | 6241 | VOIDmode, |
e5e809f4 JL |
6242 | modifier == EXPAND_INITIALIZER |
6243 | ? modifier : EXPAND_NORMAL); | |
bbf6f052 | 6244 | |
8c8a8e34 | 6245 | /* If this is a constant, put it into a register if it is a |
8008b228 | 6246 | legitimate constant and memory if it isn't. */ |
8c8a8e34 JW |
6247 | if (CONSTANT_P (op0)) |
6248 | { | |
6249 | enum machine_mode mode = TYPE_MODE (TREE_TYPE (tem)); | |
f2878c6b | 6250 | if (mode != BLKmode && LEGITIMATE_CONSTANT_P (op0)) |
8c8a8e34 JW |
6251 | op0 = force_reg (mode, op0); |
6252 | else | |
6253 | op0 = validize_mem (force_const_mem (mode, op0)); | |
6254 | } | |
6255 | ||
7bb0943f RS |
6256 | if (offset != 0) |
6257 | { | |
906c4e36 | 6258 | rtx offset_rtx = expand_expr (offset, NULL_RTX, VOIDmode, 0); |
7bb0943f RS |
6259 | |
6260 | if (GET_CODE (op0) != MEM) | |
6261 | abort (); | |
2d48c13d JL |
6262 | |
6263 | if (GET_MODE (offset_rtx) != ptr_mode) | |
bd070e1a | 6264 | { |
2d48c13d | 6265 | #ifdef POINTERS_EXTEND_UNSIGNED |
822a3443 | 6266 | offset_rtx = convert_memory_address (ptr_mode, offset_rtx); |
2d48c13d | 6267 | #else |
bd070e1a | 6268 | offset_rtx = convert_to_mode (ptr_mode, offset_rtx, 0); |
2d48c13d | 6269 | #endif |
bd070e1a | 6270 | } |
2d48c13d | 6271 | |
89752202 HB |
6272 | if (GET_CODE (op0) == MEM |
6273 | && GET_MODE (op0) == BLKmode | |
6274 | && bitsize | |
6275 | && (bitpos % bitsize) == 0 | |
6276 | && (bitsize % GET_MODE_ALIGNMENT (mode1)) == 0 | |
6277 | && (alignment * BITS_PER_UNIT) == GET_MODE_ALIGNMENT (mode1)) | |
6278 | { | |
6279 | rtx temp = change_address (op0, mode1, | |
6280 | plus_constant (XEXP (op0, 0), | |
6281 | (bitpos / | |
6282 | BITS_PER_UNIT))); | |
6283 | if (GET_CODE (XEXP (temp, 0)) == REG) | |
6284 | op0 = temp; | |
6285 | else | |
6286 | op0 = change_address (op0, mode1, | |
6287 | force_reg (GET_MODE (XEXP (temp, 0)), | |
6288 | XEXP (temp, 0))); | |
6289 | bitpos = 0; | |
6290 | } | |
6291 | ||
6292 | ||
7bb0943f | 6293 | op0 = change_address (op0, VOIDmode, |
38a448ca RH |
6294 | gen_rtx_PLUS (ptr_mode, XEXP (op0, 0), |
6295 | force_reg (ptr_mode, offset_rtx))); | |
7bb0943f RS |
6296 | } |
6297 | ||
bbf6f052 RK |
6298 | /* Don't forget about volatility even if this is a bitfield. */ |
6299 | if (GET_CODE (op0) == MEM && volatilep && ! MEM_VOLATILE_P (op0)) | |
6300 | { | |
6301 | op0 = copy_rtx (op0); | |
6302 | MEM_VOLATILE_P (op0) = 1; | |
6303 | } | |
6304 | ||
921b3427 RK |
6305 | /* Check the access. */ |
6306 | if (flag_check_memory_usage && GET_CODE (op0) == MEM) | |
6307 | { | |
6308 | enum memory_use_mode memory_usage; | |
6309 | memory_usage = get_memory_usage_from_modifier (modifier); | |
6310 | ||
6311 | if (memory_usage != MEMORY_USE_DONT) | |
6312 | { | |
6313 | rtx to; | |
6314 | int size; | |
6315 | ||
6316 | to = plus_constant (XEXP (op0, 0), (bitpos / BITS_PER_UNIT)); | |
6317 | size = (bitpos % BITS_PER_UNIT) + bitsize + BITS_PER_UNIT - 1; | |
6318 | ||
6319 | /* Check the access right of the pointer. */ | |
e9a25f70 JL |
6320 | if (size > BITS_PER_UNIT) |
6321 | emit_library_call (chkr_check_addr_libfunc, 1, VOIDmode, 3, | |
6322 | to, ptr_mode, | |
6323 | GEN_INT (size / BITS_PER_UNIT), | |
6324 | TYPE_MODE (sizetype), | |
956d6950 JL |
6325 | GEN_INT (memory_usage), |
6326 | TYPE_MODE (integer_type_node)); | |
921b3427 RK |
6327 | } |
6328 | } | |
6329 | ||
ccc98036 RS |
6330 | /* In cases where an aligned union has an unaligned object |
6331 | as a field, we might be extracting a BLKmode value from | |
6332 | an integer-mode (e.g., SImode) object. Handle this case | |
6333 | by doing the extract into an object as wide as the field | |
6334 | (which we know to be the width of a basic mode), then | |
f2420d0b JW |
6335 | storing into memory, and changing the mode to BLKmode. |
6336 | If we ultimately want the address (EXPAND_CONST_ADDRESS or | |
6337 | EXPAND_INITIALIZER), then we must not copy to a temporary. */ | |
bbf6f052 | 6338 | if (mode1 == VOIDmode |
ccc98036 | 6339 | || GET_CODE (op0) == REG || GET_CODE (op0) == SUBREG |
f9409c3a | 6340 | || (modifier != EXPAND_CONST_ADDRESS |
f9409c3a | 6341 | && modifier != EXPAND_INITIALIZER |
c2722ef6 RK |
6342 | && ((mode1 != BLKmode && ! direct_load[(int) mode1] |
6343 | && GET_MODE_CLASS (mode) != MODE_COMPLEX_INT | |
6344 | && GET_MODE_CLASS (mode) != MODE_COMPLEX_FLOAT) | |
f9409c3a JW |
6345 | /* If the field isn't aligned enough to fetch as a memref, |
6346 | fetch it as a bit field. */ | |
6347 | || (SLOW_UNALIGNED_ACCESS | |
6348 | && ((TYPE_ALIGN (TREE_TYPE (tem)) < GET_MODE_ALIGNMENT (mode)) | |
6349 | || (bitpos % GET_MODE_ALIGNMENT (mode) != 0)))))) | |
bbf6f052 | 6350 | { |
bbf6f052 RK |
6351 | enum machine_mode ext_mode = mode; |
6352 | ||
6353 | if (ext_mode == BLKmode) | |
6354 | ext_mode = mode_for_size (bitsize, MODE_INT, 1); | |
6355 | ||
6356 | if (ext_mode == BLKmode) | |
a281e72d RK |
6357 | { |
6358 | /* In this case, BITPOS must start at a byte boundary and | |
6359 | TARGET, if specified, must be a MEM. */ | |
6360 | if (GET_CODE (op0) != MEM | |
6361 | || (target != 0 && GET_CODE (target) != MEM) | |
6362 | || bitpos % BITS_PER_UNIT != 0) | |
6363 | abort (); | |
6364 | ||
6365 | op0 = change_address (op0, VOIDmode, | |
6366 | plus_constant (XEXP (op0, 0), | |
6367 | bitpos / BITS_PER_UNIT)); | |
6368 | if (target == 0) | |
6369 | target = assign_temp (type, 0, 1, 1); | |
6370 | ||
6371 | emit_block_move (target, op0, | |
6372 | GEN_INT ((bitsize + BITS_PER_UNIT - 1) | |
6373 | / BITS_PER_UNIT), | |
6374 | 1); | |
6375 | ||
6376 | return target; | |
6377 | } | |
bbf6f052 | 6378 | |
dc6d66b3 RK |
6379 | op0 = validize_mem (op0); |
6380 | ||
6381 | if (GET_CODE (op0) == MEM && GET_CODE (XEXP (op0, 0)) == REG) | |
6382 | mark_reg_pointer (XEXP (op0, 0), alignment); | |
6383 | ||
6384 | op0 = extract_bit_field (op0, bitsize, bitpos, | |
bbf6f052 | 6385 | unsignedp, target, ext_mode, ext_mode, |
034f9101 | 6386 | alignment, |
bbf6f052 | 6387 | int_size_in_bytes (TREE_TYPE (tem))); |
ef19912d RK |
6388 | |
6389 | /* If the result is a record type and BITSIZE is narrower than | |
6390 | the mode of OP0, an integral mode, and this is a big endian | |
6391 | machine, we must put the field into the high-order bits. */ | |
6392 | if (TREE_CODE (type) == RECORD_TYPE && BYTES_BIG_ENDIAN | |
6393 | && GET_MODE_CLASS (GET_MODE (op0)) == MODE_INT | |
6394 | && bitsize < GET_MODE_BITSIZE (GET_MODE (op0))) | |
6395 | op0 = expand_shift (LSHIFT_EXPR, GET_MODE (op0), op0, | |
6396 | size_int (GET_MODE_BITSIZE (GET_MODE (op0)) | |
6397 | - bitsize), | |
6398 | op0, 1); | |
6399 | ||
bbf6f052 RK |
6400 | if (mode == BLKmode) |
6401 | { | |
6402 | rtx new = assign_stack_temp (ext_mode, | |
6403 | bitsize / BITS_PER_UNIT, 0); | |
6404 | ||
6405 | emit_move_insn (new, op0); | |
6406 | op0 = copy_rtx (new); | |
6407 | PUT_MODE (op0, BLKmode); | |
092dded9 | 6408 | MEM_IN_STRUCT_P (op0) = 1; |
bbf6f052 RK |
6409 | } |
6410 | ||
6411 | return op0; | |
6412 | } | |
6413 | ||
05019f83 RK |
6414 | /* If the result is BLKmode, use that to access the object |
6415 | now as well. */ | |
6416 | if (mode == BLKmode) | |
6417 | mode1 = BLKmode; | |
6418 | ||
bbf6f052 RK |
6419 | /* Get a reference to just this component. */ |
6420 | if (modifier == EXPAND_CONST_ADDRESS | |
6421 | || modifier == EXPAND_SUM || modifier == EXPAND_INITIALIZER) | |
38a448ca RH |
6422 | op0 = gen_rtx_MEM (mode1, plus_constant (XEXP (op0, 0), |
6423 | (bitpos / BITS_PER_UNIT))); | |
bbf6f052 RK |
6424 | else |
6425 | op0 = change_address (op0, mode1, | |
6426 | plus_constant (XEXP (op0, 0), | |
6427 | (bitpos / BITS_PER_UNIT))); | |
41472af8 MM |
6428 | |
6429 | if (GET_CODE (op0) == MEM) | |
6430 | MEM_ALIAS_SET (op0) = get_alias_set (exp); | |
6431 | ||
dc6d66b3 RK |
6432 | if (GET_CODE (XEXP (op0, 0)) == REG) |
6433 | mark_reg_pointer (XEXP (op0, 0), alignment); | |
6434 | ||
bbf6f052 RK |
6435 | MEM_IN_STRUCT_P (op0) = 1; |
6436 | MEM_VOLATILE_P (op0) |= volatilep; | |
0d15e60c | 6437 | if (mode == mode1 || mode1 == BLKmode || mode1 == tmode |
08bbd316 | 6438 | || modifier == EXPAND_CONST_ADDRESS |
0d15e60c | 6439 | || modifier == EXPAND_INITIALIZER) |
bbf6f052 | 6440 | return op0; |
0d15e60c | 6441 | else if (target == 0) |
bbf6f052 | 6442 | target = gen_reg_rtx (tmode != VOIDmode ? tmode : mode); |
0d15e60c | 6443 | |
bbf6f052 RK |
6444 | convert_move (target, op0, unsignedp); |
6445 | return target; | |
6446 | } | |
6447 | ||
bbf6f052 RK |
6448 | /* Intended for a reference to a buffer of a file-object in Pascal. |
6449 | But it's not certain that a special tree code will really be | |
6450 | necessary for these. INDIRECT_REF might work for them. */ | |
6451 | case BUFFER_REF: | |
6452 | abort (); | |
6453 | ||
7308a047 | 6454 | case IN_EXPR: |
7308a047 | 6455 | { |
d6a5ac33 RK |
6456 | /* Pascal set IN expression. |
6457 | ||
6458 | Algorithm: | |
6459 | rlo = set_low - (set_low%bits_per_word); | |
6460 | the_word = set [ (index - rlo)/bits_per_word ]; | |
6461 | bit_index = index % bits_per_word; | |
6462 | bitmask = 1 << bit_index; | |
6463 | return !!(the_word & bitmask); */ | |
6464 | ||
7308a047 RS |
6465 | tree set = TREE_OPERAND (exp, 0); |
6466 | tree index = TREE_OPERAND (exp, 1); | |
d6a5ac33 | 6467 | int iunsignedp = TREE_UNSIGNED (TREE_TYPE (index)); |
7308a047 | 6468 | tree set_type = TREE_TYPE (set); |
7308a047 RS |
6469 | tree set_low_bound = TYPE_MIN_VALUE (TYPE_DOMAIN (set_type)); |
6470 | tree set_high_bound = TYPE_MAX_VALUE (TYPE_DOMAIN (set_type)); | |
d6a5ac33 RK |
6471 | rtx index_val = expand_expr (index, 0, VOIDmode, 0); |
6472 | rtx lo_r = expand_expr (set_low_bound, 0, VOIDmode, 0); | |
6473 | rtx hi_r = expand_expr (set_high_bound, 0, VOIDmode, 0); | |
6474 | rtx setval = expand_expr (set, 0, VOIDmode, 0); | |
6475 | rtx setaddr = XEXP (setval, 0); | |
6476 | enum machine_mode index_mode = TYPE_MODE (TREE_TYPE (index)); | |
7308a047 RS |
6477 | rtx rlow; |
6478 | rtx diff, quo, rem, addr, bit, result; | |
7308a047 | 6479 | |
d6a5ac33 RK |
6480 | preexpand_calls (exp); |
6481 | ||
6482 | /* If domain is empty, answer is no. Likewise if index is constant | |
6483 | and out of bounds. */ | |
51723711 | 6484 | if (((TREE_CODE (set_high_bound) == INTEGER_CST |
d6a5ac33 | 6485 | && TREE_CODE (set_low_bound) == INTEGER_CST |
51723711 | 6486 | && tree_int_cst_lt (set_high_bound, set_low_bound)) |
d6a5ac33 RK |
6487 | || (TREE_CODE (index) == INTEGER_CST |
6488 | && TREE_CODE (set_low_bound) == INTEGER_CST | |
6489 | && tree_int_cst_lt (index, set_low_bound)) | |
6490 | || (TREE_CODE (set_high_bound) == INTEGER_CST | |
6491 | && TREE_CODE (index) == INTEGER_CST | |
6492 | && tree_int_cst_lt (set_high_bound, index)))) | |
7308a047 RS |
6493 | return const0_rtx; |
6494 | ||
d6a5ac33 RK |
6495 | if (target == 0) |
6496 | target = gen_reg_rtx (tmode != VOIDmode ? tmode : mode); | |
7308a047 RS |
6497 | |
6498 | /* If we get here, we have to generate the code for both cases | |
6499 | (in range and out of range). */ | |
6500 | ||
6501 | op0 = gen_label_rtx (); | |
6502 | op1 = gen_label_rtx (); | |
6503 | ||
6504 | if (! (GET_CODE (index_val) == CONST_INT | |
6505 | && GET_CODE (lo_r) == CONST_INT)) | |
6506 | { | |
17938e57 | 6507 | emit_cmp_insn (index_val, lo_r, LT, NULL_RTX, |
d6a5ac33 | 6508 | GET_MODE (index_val), iunsignedp, 0); |
7308a047 RS |
6509 | emit_jump_insn (gen_blt (op1)); |
6510 | } | |
6511 | ||
6512 | if (! (GET_CODE (index_val) == CONST_INT | |
6513 | && GET_CODE (hi_r) == CONST_INT)) | |
6514 | { | |
17938e57 | 6515 | emit_cmp_insn (index_val, hi_r, GT, NULL_RTX, |
d6a5ac33 | 6516 | GET_MODE (index_val), iunsignedp, 0); |
7308a047 RS |
6517 | emit_jump_insn (gen_bgt (op1)); |
6518 | } | |
6519 | ||
6520 | /* Calculate the element number of bit zero in the first word | |
6521 | of the set. */ | |
6522 | if (GET_CODE (lo_r) == CONST_INT) | |
17938e57 RK |
6523 | rlow = GEN_INT (INTVAL (lo_r) |
6524 | & ~ ((HOST_WIDE_INT) 1 << BITS_PER_UNIT)); | |
7308a047 | 6525 | else |
17938e57 RK |
6526 | rlow = expand_binop (index_mode, and_optab, lo_r, |
6527 | GEN_INT (~((HOST_WIDE_INT) 1 << BITS_PER_UNIT)), | |
d6a5ac33 | 6528 | NULL_RTX, iunsignedp, OPTAB_LIB_WIDEN); |
7308a047 | 6529 | |
d6a5ac33 RK |
6530 | diff = expand_binop (index_mode, sub_optab, index_val, rlow, |
6531 | NULL_RTX, iunsignedp, OPTAB_LIB_WIDEN); | |
7308a047 RS |
6532 | |
6533 | quo = expand_divmod (0, TRUNC_DIV_EXPR, index_mode, diff, | |
d6a5ac33 | 6534 | GEN_INT (BITS_PER_UNIT), NULL_RTX, iunsignedp); |
7308a047 | 6535 | rem = expand_divmod (1, TRUNC_MOD_EXPR, index_mode, index_val, |
d6a5ac33 RK |
6536 | GEN_INT (BITS_PER_UNIT), NULL_RTX, iunsignedp); |
6537 | ||
7308a047 | 6538 | addr = memory_address (byte_mode, |
d6a5ac33 RK |
6539 | expand_binop (index_mode, add_optab, diff, |
6540 | setaddr, NULL_RTX, iunsignedp, | |
17938e57 | 6541 | OPTAB_LIB_WIDEN)); |
d6a5ac33 | 6542 | |
7308a047 RS |
6543 | /* Extract the bit we want to examine */ |
6544 | bit = expand_shift (RSHIFT_EXPR, byte_mode, | |
38a448ca | 6545 | gen_rtx_MEM (byte_mode, addr), |
17938e57 RK |
6546 | make_tree (TREE_TYPE (index), rem), |
6547 | NULL_RTX, 1); | |
6548 | result = expand_binop (byte_mode, and_optab, bit, const1_rtx, | |
6549 | GET_MODE (target) == byte_mode ? target : 0, | |
7308a047 | 6550 | 1, OPTAB_LIB_WIDEN); |
17938e57 RK |
6551 | |
6552 | if (result != target) | |
6553 | convert_move (target, result, 1); | |
7308a047 RS |
6554 | |
6555 | /* Output the code to handle the out-of-range case. */ | |
6556 | emit_jump (op0); | |
6557 | emit_label (op1); | |
6558 | emit_move_insn (target, const0_rtx); | |
6559 | emit_label (op0); | |
6560 | return target; | |
6561 | } | |
6562 | ||
bbf6f052 RK |
6563 | case WITH_CLEANUP_EXPR: |
6564 | if (RTL_EXPR_RTL (exp) == 0) | |
6565 | { | |
6566 | RTL_EXPR_RTL (exp) | |
921b3427 | 6567 | = expand_expr (TREE_OPERAND (exp, 0), target, tmode, ro_modifier); |
e976b8b2 MS |
6568 | expand_decl_cleanup (NULL_TREE, TREE_OPERAND (exp, 2)); |
6569 | ||
bbf6f052 RK |
6570 | /* That's it for this cleanup. */ |
6571 | TREE_OPERAND (exp, 2) = 0; | |
6572 | } | |
6573 | return RTL_EXPR_RTL (exp); | |
6574 | ||
5dab5552 MS |
6575 | case CLEANUP_POINT_EXPR: |
6576 | { | |
d93d4205 | 6577 | extern int temp_slot_level; |
e976b8b2 MS |
6578 | /* Start a new binding layer that will keep track of all cleanup |
6579 | actions to be performed. */ | |
6580 | expand_start_bindings (0); | |
6581 | ||
d93d4205 | 6582 | target_temp_slot_level = temp_slot_level; |
e976b8b2 | 6583 | |
921b3427 | 6584 | op0 = expand_expr (TREE_OPERAND (exp, 0), target, tmode, ro_modifier); |
f283f66b JM |
6585 | /* If we're going to use this value, load it up now. */ |
6586 | if (! ignore) | |
6587 | op0 = force_not_mem (op0); | |
d93d4205 | 6588 | preserve_temp_slots (op0); |
e976b8b2 | 6589 | expand_end_bindings (NULL_TREE, 0, 0); |
5dab5552 MS |
6590 | } |
6591 | return op0; | |
6592 | ||
bbf6f052 RK |
6593 | case CALL_EXPR: |
6594 | /* Check for a built-in function. */ | |
6595 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == ADDR_EXPR | |
d6a5ac33 RK |
6596 | && (TREE_CODE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0)) |
6597 | == FUNCTION_DECL) | |
bbf6f052 RK |
6598 | && DECL_BUILT_IN (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))) |
6599 | return expand_builtin (exp, target, subtarget, tmode, ignore); | |
d6a5ac33 | 6600 | |
bbf6f052 RK |
6601 | /* If this call was expanded already by preexpand_calls, |
6602 | just return the result we got. */ | |
6603 | if (CALL_EXPR_RTL (exp) != 0) | |
6604 | return CALL_EXPR_RTL (exp); | |
d6a5ac33 | 6605 | |
8129842c | 6606 | return expand_call (exp, target, ignore); |
bbf6f052 RK |
6607 | |
6608 | case NON_LVALUE_EXPR: | |
6609 | case NOP_EXPR: | |
6610 | case CONVERT_EXPR: | |
6611 | case REFERENCE_EXPR: | |
bbf6f052 RK |
6612 | if (TREE_CODE (type) == UNION_TYPE) |
6613 | { | |
6614 | tree valtype = TREE_TYPE (TREE_OPERAND (exp, 0)); | |
6615 | if (target == 0) | |
06089a8b RK |
6616 | { |
6617 | if (mode != BLKmode) | |
6618 | target = gen_reg_rtx (tmode != VOIDmode ? tmode : mode); | |
6619 | else | |
6620 | target = assign_temp (type, 0, 1, 1); | |
6621 | } | |
d6a5ac33 | 6622 | |
bbf6f052 RK |
6623 | if (GET_CODE (target) == MEM) |
6624 | /* Store data into beginning of memory target. */ | |
6625 | store_expr (TREE_OPERAND (exp, 0), | |
1499e0a8 RK |
6626 | change_address (target, TYPE_MODE (valtype), 0), 0); |
6627 | ||
bbf6f052 RK |
6628 | else if (GET_CODE (target) == REG) |
6629 | /* Store this field into a union of the proper type. */ | |
6630 | store_field (target, GET_MODE_BITSIZE (TYPE_MODE (valtype)), 0, | |
6631 | TYPE_MODE (valtype), TREE_OPERAND (exp, 0), | |
6632 | VOIDmode, 0, 1, | |
ece32014 MM |
6633 | int_size_in_bytes (TREE_TYPE (TREE_OPERAND (exp, 0))), |
6634 | 0); | |
bbf6f052 RK |
6635 | else |
6636 | abort (); | |
6637 | ||
6638 | /* Return the entire union. */ | |
6639 | return target; | |
6640 | } | |
d6a5ac33 | 6641 | |
7f62854a RK |
6642 | if (mode == TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0)))) |
6643 | { | |
6644 | op0 = expand_expr (TREE_OPERAND (exp, 0), target, VOIDmode, | |
921b3427 | 6645 | ro_modifier); |
7f62854a RK |
6646 | |
6647 | /* If the signedness of the conversion differs and OP0 is | |
6648 | a promoted SUBREG, clear that indication since we now | |
6649 | have to do the proper extension. */ | |
6650 | if (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0))) != unsignedp | |
6651 | && GET_CODE (op0) == SUBREG) | |
6652 | SUBREG_PROMOTED_VAR_P (op0) = 0; | |
6653 | ||
6654 | return op0; | |
6655 | } | |
6656 | ||
1499e0a8 | 6657 | op0 = expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, mode, 0); |
12342f90 RS |
6658 | if (GET_MODE (op0) == mode) |
6659 | return op0; | |
12342f90 | 6660 | |
d6a5ac33 RK |
6661 | /* If OP0 is a constant, just convert it into the proper mode. */ |
6662 | if (CONSTANT_P (op0)) | |
6663 | return | |
6664 | convert_modes (mode, TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))), | |
6665 | op0, TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))); | |
12342f90 | 6666 | |
26fcb35a | 6667 | if (modifier == EXPAND_INITIALIZER) |
38a448ca | 6668 | return gen_rtx_fmt_e (unsignedp ? ZERO_EXTEND : SIGN_EXTEND, mode, op0); |
d6a5ac33 | 6669 | |
bbf6f052 | 6670 | if (target == 0) |
d6a5ac33 RK |
6671 | return |
6672 | convert_to_mode (mode, op0, | |
6673 | TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))); | |
bbf6f052 | 6674 | else |
d6a5ac33 RK |
6675 | convert_move (target, op0, |
6676 | TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))); | |
bbf6f052 RK |
6677 | return target; |
6678 | ||
6679 | case PLUS_EXPR: | |
0f41302f MS |
6680 | /* We come here from MINUS_EXPR when the second operand is a |
6681 | constant. */ | |
bbf6f052 RK |
6682 | plus_expr: |
6683 | this_optab = add_optab; | |
6684 | ||
6685 | /* If we are adding a constant, an RTL_EXPR that is sp, fp, or ap, and | |
6686 | something else, make sure we add the register to the constant and | |
6687 | then to the other thing. This case can occur during strength | |
6688 | reduction and doing it this way will produce better code if the | |
6689 | frame pointer or argument pointer is eliminated. | |
6690 | ||
6691 | fold-const.c will ensure that the constant is always in the inner | |
6692 | PLUS_EXPR, so the only case we need to do anything about is if | |
6693 | sp, ap, or fp is our second argument, in which case we must swap | |
6694 | the innermost first argument and our second argument. */ | |
6695 | ||
6696 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == PLUS_EXPR | |
6697 | && TREE_CODE (TREE_OPERAND (TREE_OPERAND (exp, 0), 1)) == INTEGER_CST | |
6698 | && TREE_CODE (TREE_OPERAND (exp, 1)) == RTL_EXPR | |
6699 | && (RTL_EXPR_RTL (TREE_OPERAND (exp, 1)) == frame_pointer_rtx | |
6700 | || RTL_EXPR_RTL (TREE_OPERAND (exp, 1)) == stack_pointer_rtx | |
6701 | || RTL_EXPR_RTL (TREE_OPERAND (exp, 1)) == arg_pointer_rtx)) | |
6702 | { | |
6703 | tree t = TREE_OPERAND (exp, 1); | |
6704 | ||
6705 | TREE_OPERAND (exp, 1) = TREE_OPERAND (TREE_OPERAND (exp, 0), 0); | |
6706 | TREE_OPERAND (TREE_OPERAND (exp, 0), 0) = t; | |
6707 | } | |
6708 | ||
88f63c77 | 6709 | /* If the result is to be ptr_mode and we are adding an integer to |
bbf6f052 RK |
6710 | something, we might be forming a constant. So try to use |
6711 | plus_constant. If it produces a sum and we can't accept it, | |
6712 | use force_operand. This allows P = &ARR[const] to generate | |
6713 | efficient code on machines where a SYMBOL_REF is not a valid | |
6714 | address. | |
6715 | ||
6716 | If this is an EXPAND_SUM call, always return the sum. */ | |
c980ac49 | 6717 | if (modifier == EXPAND_SUM || modifier == EXPAND_INITIALIZER |
88f63c77 | 6718 | || mode == ptr_mode) |
bbf6f052 | 6719 | { |
c980ac49 RS |
6720 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == INTEGER_CST |
6721 | && GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT | |
6722 | && TREE_CONSTANT (TREE_OPERAND (exp, 1))) | |
6723 | { | |
6724 | op1 = expand_expr (TREE_OPERAND (exp, 1), subtarget, VOIDmode, | |
6725 | EXPAND_SUM); | |
6726 | op1 = plus_constant (op1, TREE_INT_CST_LOW (TREE_OPERAND (exp, 0))); | |
6727 | if (modifier != EXPAND_SUM && modifier != EXPAND_INITIALIZER) | |
6728 | op1 = force_operand (op1, target); | |
6729 | return op1; | |
6730 | } | |
bbf6f052 | 6731 | |
c980ac49 RS |
6732 | else if (TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST |
6733 | && GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_INT | |
6734 | && TREE_CONSTANT (TREE_OPERAND (exp, 0))) | |
6735 | { | |
6736 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, | |
6737 | EXPAND_SUM); | |
6738 | if (! CONSTANT_P (op0)) | |
6739 | { | |
6740 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, | |
6741 | VOIDmode, modifier); | |
709f5be1 RS |
6742 | /* Don't go to both_summands if modifier |
6743 | says it's not right to return a PLUS. */ | |
6744 | if (modifier != EXPAND_SUM && modifier != EXPAND_INITIALIZER) | |
6745 | goto binop2; | |
c980ac49 RS |
6746 | goto both_summands; |
6747 | } | |
6748 | op0 = plus_constant (op0, TREE_INT_CST_LOW (TREE_OPERAND (exp, 1))); | |
6749 | if (modifier != EXPAND_SUM && modifier != EXPAND_INITIALIZER) | |
6750 | op0 = force_operand (op0, target); | |
6751 | return op0; | |
6752 | } | |
bbf6f052 RK |
6753 | } |
6754 | ||
6755 | /* No sense saving up arithmetic to be done | |
6756 | if it's all in the wrong mode to form part of an address. | |
6757 | And force_operand won't know whether to sign-extend or | |
6758 | zero-extend. */ | |
6759 | if ((modifier != EXPAND_SUM && modifier != EXPAND_INITIALIZER) | |
88f63c77 | 6760 | || mode != ptr_mode) |
c980ac49 | 6761 | goto binop; |
bbf6f052 RK |
6762 | |
6763 | preexpand_calls (exp); | |
e5e809f4 | 6764 | if (! safe_from_p (subtarget, TREE_OPERAND (exp, 1), 1)) |
bbf6f052 RK |
6765 | subtarget = 0; |
6766 | ||
921b3427 RK |
6767 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, ro_modifier); |
6768 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, ro_modifier); | |
bbf6f052 | 6769 | |
c980ac49 | 6770 | both_summands: |
bbf6f052 RK |
6771 | /* Make sure any term that's a sum with a constant comes last. */ |
6772 | if (GET_CODE (op0) == PLUS | |
6773 | && CONSTANT_P (XEXP (op0, 1))) | |
6774 | { | |
6775 | temp = op0; | |
6776 | op0 = op1; | |
6777 | op1 = temp; | |
6778 | } | |
6779 | /* If adding to a sum including a constant, | |
6780 | associate it to put the constant outside. */ | |
6781 | if (GET_CODE (op1) == PLUS | |
6782 | && CONSTANT_P (XEXP (op1, 1))) | |
6783 | { | |
6784 | rtx constant_term = const0_rtx; | |
6785 | ||
6786 | temp = simplify_binary_operation (PLUS, mode, XEXP (op1, 0), op0); | |
6787 | if (temp != 0) | |
6788 | op0 = temp; | |
6f90e075 JW |
6789 | /* Ensure that MULT comes first if there is one. */ |
6790 | else if (GET_CODE (op0) == MULT) | |
38a448ca | 6791 | op0 = gen_rtx_PLUS (mode, op0, XEXP (op1, 0)); |
bbf6f052 | 6792 | else |
38a448ca | 6793 | op0 = gen_rtx_PLUS (mode, XEXP (op1, 0), op0); |
bbf6f052 RK |
6794 | |
6795 | /* Let's also eliminate constants from op0 if possible. */ | |
6796 | op0 = eliminate_constant_term (op0, &constant_term); | |
6797 | ||
6798 | /* CONSTANT_TERM and XEXP (op1, 1) are known to be constant, so | |
6799 | their sum should be a constant. Form it into OP1, since the | |
6800 | result we want will then be OP0 + OP1. */ | |
6801 | ||
6802 | temp = simplify_binary_operation (PLUS, mode, constant_term, | |
6803 | XEXP (op1, 1)); | |
6804 | if (temp != 0) | |
6805 | op1 = temp; | |
6806 | else | |
38a448ca | 6807 | op1 = gen_rtx_PLUS (mode, constant_term, XEXP (op1, 1)); |
bbf6f052 RK |
6808 | } |
6809 | ||
6810 | /* Put a constant term last and put a multiplication first. */ | |
6811 | if (CONSTANT_P (op0) || GET_CODE (op1) == MULT) | |
6812 | temp = op1, op1 = op0, op0 = temp; | |
6813 | ||
6814 | temp = simplify_binary_operation (PLUS, mode, op0, op1); | |
38a448ca | 6815 | return temp ? temp : gen_rtx_PLUS (mode, op0, op1); |
bbf6f052 RK |
6816 | |
6817 | case MINUS_EXPR: | |
ea87523e RK |
6818 | /* For initializers, we are allowed to return a MINUS of two |
6819 | symbolic constants. Here we handle all cases when both operands | |
6820 | are constant. */ | |
bbf6f052 RK |
6821 | /* Handle difference of two symbolic constants, |
6822 | for the sake of an initializer. */ | |
6823 | if ((modifier == EXPAND_SUM || modifier == EXPAND_INITIALIZER) | |
6824 | && really_constant_p (TREE_OPERAND (exp, 0)) | |
6825 | && really_constant_p (TREE_OPERAND (exp, 1))) | |
6826 | { | |
906c4e36 | 6827 | rtx op0 = expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, |
921b3427 | 6828 | VOIDmode, ro_modifier); |
906c4e36 | 6829 | rtx op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, |
921b3427 | 6830 | VOIDmode, ro_modifier); |
ea87523e | 6831 | |
ea87523e RK |
6832 | /* If the last operand is a CONST_INT, use plus_constant of |
6833 | the negated constant. Else make the MINUS. */ | |
6834 | if (GET_CODE (op1) == CONST_INT) | |
6835 | return plus_constant (op0, - INTVAL (op1)); | |
6836 | else | |
38a448ca | 6837 | return gen_rtx_MINUS (mode, op0, op1); |
bbf6f052 RK |
6838 | } |
6839 | /* Convert A - const to A + (-const). */ | |
6840 | if (TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST) | |
6841 | { | |
ae431183 RK |
6842 | tree negated = fold (build1 (NEGATE_EXPR, type, |
6843 | TREE_OPERAND (exp, 1))); | |
6844 | ||
6845 | /* Deal with the case where we can't negate the constant | |
6846 | in TYPE. */ | |
6847 | if (TREE_UNSIGNED (type) || TREE_OVERFLOW (negated)) | |
6848 | { | |
6849 | tree newtype = signed_type (type); | |
6850 | tree newop0 = convert (newtype, TREE_OPERAND (exp, 0)); | |
6851 | tree newop1 = convert (newtype, TREE_OPERAND (exp, 1)); | |
6852 | tree newneg = fold (build1 (NEGATE_EXPR, newtype, newop1)); | |
6853 | ||
6854 | if (! TREE_OVERFLOW (newneg)) | |
6855 | return expand_expr (convert (type, | |
6856 | build (PLUS_EXPR, newtype, | |
6857 | newop0, newneg)), | |
921b3427 | 6858 | target, tmode, ro_modifier); |
ae431183 RK |
6859 | } |
6860 | else | |
6861 | { | |
6862 | exp = build (PLUS_EXPR, type, TREE_OPERAND (exp, 0), negated); | |
6863 | goto plus_expr; | |
6864 | } | |
bbf6f052 RK |
6865 | } |
6866 | this_optab = sub_optab; | |
6867 | goto binop; | |
6868 | ||
6869 | case MULT_EXPR: | |
6870 | preexpand_calls (exp); | |
6871 | /* If first operand is constant, swap them. | |
6872 | Thus the following special case checks need only | |
6873 | check the second operand. */ | |
6874 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == INTEGER_CST) | |
6875 | { | |
6876 | register tree t1 = TREE_OPERAND (exp, 0); | |
6877 | TREE_OPERAND (exp, 0) = TREE_OPERAND (exp, 1); | |
6878 | TREE_OPERAND (exp, 1) = t1; | |
6879 | } | |
6880 | ||
6881 | /* Attempt to return something suitable for generating an | |
6882 | indexed address, for machines that support that. */ | |
6883 | ||
88f63c77 | 6884 | if (modifier == EXPAND_SUM && mode == ptr_mode |
bbf6f052 | 6885 | && TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST |
906c4e36 | 6886 | && GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT) |
bbf6f052 | 6887 | { |
921b3427 RK |
6888 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, |
6889 | EXPAND_SUM); | |
bbf6f052 RK |
6890 | |
6891 | /* Apply distributive law if OP0 is x+c. */ | |
6892 | if (GET_CODE (op0) == PLUS | |
6893 | && GET_CODE (XEXP (op0, 1)) == CONST_INT) | |
38a448ca RH |
6894 | return gen_rtx_PLUS (mode, |
6895 | gen_rtx_MULT (mode, XEXP (op0, 0), | |
6896 | GEN_INT (TREE_INT_CST_LOW (TREE_OPERAND (exp, 1)))), | |
906c4e36 RK |
6897 | GEN_INT (TREE_INT_CST_LOW (TREE_OPERAND (exp, 1)) |
6898 | * INTVAL (XEXP (op0, 1)))); | |
bbf6f052 RK |
6899 | |
6900 | if (GET_CODE (op0) != REG) | |
906c4e36 | 6901 | op0 = force_operand (op0, NULL_RTX); |
bbf6f052 RK |
6902 | if (GET_CODE (op0) != REG) |
6903 | op0 = copy_to_mode_reg (mode, op0); | |
6904 | ||
38a448ca RH |
6905 | return gen_rtx_MULT (mode, op0, |
6906 | GEN_INT (TREE_INT_CST_LOW (TREE_OPERAND (exp, 1)))); | |
bbf6f052 RK |
6907 | } |
6908 | ||
e5e809f4 | 6909 | if (! safe_from_p (subtarget, TREE_OPERAND (exp, 1), 1)) |
bbf6f052 RK |
6910 | subtarget = 0; |
6911 | ||
6912 | /* Check for multiplying things that have been extended | |
6913 | from a narrower type. If this machine supports multiplying | |
6914 | in that narrower type with a result in the desired type, | |
6915 | do it that way, and avoid the explicit type-conversion. */ | |
6916 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == NOP_EXPR | |
6917 | && TREE_CODE (type) == INTEGER_TYPE | |
6918 | && (TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))) | |
6919 | < TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (exp, 0)))) | |
6920 | && ((TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST | |
6921 | && int_fits_type_p (TREE_OPERAND (exp, 1), | |
6922 | TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))) | |
6923 | /* Don't use a widening multiply if a shift will do. */ | |
6924 | && ((GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 1)))) | |
906c4e36 | 6925 | > HOST_BITS_PER_WIDE_INT) |
bbf6f052 RK |
6926 | || exact_log2 (TREE_INT_CST_LOW (TREE_OPERAND (exp, 1))) < 0)) |
6927 | || | |
6928 | (TREE_CODE (TREE_OPERAND (exp, 1)) == NOP_EXPR | |
6929 | && (TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 1), 0))) | |
6930 | == | |
6931 | TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0)))) | |
6932 | /* If both operands are extended, they must either both | |
6933 | be zero-extended or both be sign-extended. */ | |
6934 | && (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 1), 0))) | |
6935 | == | |
6936 | TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))))))) | |
6937 | { | |
6938 | enum machine_mode innermode | |
6939 | = TYPE_MODE (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))); | |
b10af0c8 TG |
6940 | optab other_optab = (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))) |
6941 | ? smul_widen_optab : umul_widen_optab); | |
bbf6f052 RK |
6942 | this_optab = (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))) |
6943 | ? umul_widen_optab : smul_widen_optab); | |
b10af0c8 | 6944 | if (mode == GET_MODE_WIDER_MODE (innermode)) |
bbf6f052 | 6945 | { |
b10af0c8 TG |
6946 | if (this_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing) |
6947 | { | |
6948 | op0 = expand_expr (TREE_OPERAND (TREE_OPERAND (exp, 0), 0), | |
6949 | NULL_RTX, VOIDmode, 0); | |
6950 | if (TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST) | |
6951 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, | |
6952 | VOIDmode, 0); | |
6953 | else | |
6954 | op1 = expand_expr (TREE_OPERAND (TREE_OPERAND (exp, 1), 0), | |
6955 | NULL_RTX, VOIDmode, 0); | |
6956 | goto binop2; | |
6957 | } | |
6958 | else if (other_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing | |
6959 | && innermode == word_mode) | |
6960 | { | |
6961 | rtx htem; | |
6962 | op0 = expand_expr (TREE_OPERAND (TREE_OPERAND (exp, 0), 0), | |
6963 | NULL_RTX, VOIDmode, 0); | |
6964 | if (TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST) | |
6965 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, | |
6966 | VOIDmode, 0); | |
6967 | else | |
6968 | op1 = expand_expr (TREE_OPERAND (TREE_OPERAND (exp, 1), 0), | |
6969 | NULL_RTX, VOIDmode, 0); | |
6970 | temp = expand_binop (mode, other_optab, op0, op1, target, | |
6971 | unsignedp, OPTAB_LIB_WIDEN); | |
6972 | htem = expand_mult_highpart_adjust (innermode, | |
6973 | gen_highpart (innermode, temp), | |
6974 | op0, op1, | |
6975 | gen_highpart (innermode, temp), | |
6976 | unsignedp); | |
6977 | emit_move_insn (gen_highpart (innermode, temp), htem); | |
6978 | return temp; | |
6979 | } | |
bbf6f052 RK |
6980 | } |
6981 | } | |
6982 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
906c4e36 | 6983 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
6984 | return expand_mult (mode, op0, op1, target, unsignedp); |
6985 | ||
6986 | case TRUNC_DIV_EXPR: | |
6987 | case FLOOR_DIV_EXPR: | |
6988 | case CEIL_DIV_EXPR: | |
6989 | case ROUND_DIV_EXPR: | |
6990 | case EXACT_DIV_EXPR: | |
6991 | preexpand_calls (exp); | |
e5e809f4 | 6992 | if (! safe_from_p (subtarget, TREE_OPERAND (exp, 1), 1)) |
bbf6f052 RK |
6993 | subtarget = 0; |
6994 | /* Possible optimization: compute the dividend with EXPAND_SUM | |
6995 | then if the divisor is constant can optimize the case | |
6996 | where some terms of the dividend have coeffs divisible by it. */ | |
6997 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
906c4e36 | 6998 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
6999 | return expand_divmod (0, code, mode, op0, op1, target, unsignedp); |
7000 | ||
7001 | case RDIV_EXPR: | |
7002 | this_optab = flodiv_optab; | |
7003 | goto binop; | |
7004 | ||
7005 | case TRUNC_MOD_EXPR: | |
7006 | case FLOOR_MOD_EXPR: | |
7007 | case CEIL_MOD_EXPR: | |
7008 | case ROUND_MOD_EXPR: | |
7009 | preexpand_calls (exp); | |
e5e809f4 | 7010 | if (! safe_from_p (subtarget, TREE_OPERAND (exp, 1), 1)) |
bbf6f052 RK |
7011 | subtarget = 0; |
7012 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
906c4e36 | 7013 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
7014 | return expand_divmod (1, code, mode, op0, op1, target, unsignedp); |
7015 | ||
7016 | case FIX_ROUND_EXPR: | |
7017 | case FIX_FLOOR_EXPR: | |
7018 | case FIX_CEIL_EXPR: | |
7019 | abort (); /* Not used for C. */ | |
7020 | ||
7021 | case FIX_TRUNC_EXPR: | |
906c4e36 | 7022 | op0 = expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
7023 | if (target == 0) |
7024 | target = gen_reg_rtx (mode); | |
7025 | expand_fix (target, op0, unsignedp); | |
7026 | return target; | |
7027 | ||
7028 | case FLOAT_EXPR: | |
906c4e36 | 7029 | op0 = expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
7030 | if (target == 0) |
7031 | target = gen_reg_rtx (mode); | |
7032 | /* expand_float can't figure out what to do if FROM has VOIDmode. | |
7033 | So give it the correct mode. With -O, cse will optimize this. */ | |
7034 | if (GET_MODE (op0) == VOIDmode) | |
7035 | op0 = copy_to_mode_reg (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))), | |
7036 | op0); | |
7037 | expand_float (target, op0, | |
7038 | TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))); | |
7039 | return target; | |
7040 | ||
7041 | case NEGATE_EXPR: | |
5b22bee8 | 7042 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); |
bbf6f052 RK |
7043 | temp = expand_unop (mode, neg_optab, op0, target, 0); |
7044 | if (temp == 0) | |
7045 | abort (); | |
7046 | return temp; | |
7047 | ||
7048 | case ABS_EXPR: | |
7049 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
7050 | ||
2d7050fd | 7051 | /* Handle complex values specially. */ |
d6a5ac33 RK |
7052 | if (GET_MODE_CLASS (mode) == MODE_COMPLEX_INT |
7053 | || GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT) | |
7054 | return expand_complex_abs (mode, op0, target, unsignedp); | |
2d7050fd | 7055 | |
bbf6f052 RK |
7056 | /* Unsigned abs is simply the operand. Testing here means we don't |
7057 | risk generating incorrect code below. */ | |
7058 | if (TREE_UNSIGNED (type)) | |
7059 | return op0; | |
7060 | ||
2e5ec6cf | 7061 | return expand_abs (mode, op0, target, unsignedp, |
e5e809f4 | 7062 | safe_from_p (target, TREE_OPERAND (exp, 0), 1)); |
bbf6f052 RK |
7063 | |
7064 | case MAX_EXPR: | |
7065 | case MIN_EXPR: | |
7066 | target = original_target; | |
e5e809f4 | 7067 | if (target == 0 || ! safe_from_p (target, TREE_OPERAND (exp, 1), 1) |
fc155707 | 7068 | || (GET_CODE (target) == MEM && MEM_VOLATILE_P (target)) |
d6a5ac33 | 7069 | || GET_MODE (target) != mode |
bbf6f052 RK |
7070 | || (GET_CODE (target) == REG |
7071 | && REGNO (target) < FIRST_PSEUDO_REGISTER)) | |
7072 | target = gen_reg_rtx (mode); | |
906c4e36 | 7073 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
7074 | op0 = expand_expr (TREE_OPERAND (exp, 0), target, VOIDmode, 0); |
7075 | ||
7076 | /* First try to do it with a special MIN or MAX instruction. | |
7077 | If that does not win, use a conditional jump to select the proper | |
7078 | value. */ | |
7079 | this_optab = (TREE_UNSIGNED (type) | |
7080 | ? (code == MIN_EXPR ? umin_optab : umax_optab) | |
7081 | : (code == MIN_EXPR ? smin_optab : smax_optab)); | |
7082 | ||
7083 | temp = expand_binop (mode, this_optab, op0, op1, target, unsignedp, | |
7084 | OPTAB_WIDEN); | |
7085 | if (temp != 0) | |
7086 | return temp; | |
7087 | ||
fa2981d8 JW |
7088 | /* At this point, a MEM target is no longer useful; we will get better |
7089 | code without it. */ | |
7090 | ||
7091 | if (GET_CODE (target) == MEM) | |
7092 | target = gen_reg_rtx (mode); | |
7093 | ||
ee456b1c RK |
7094 | if (target != op0) |
7095 | emit_move_insn (target, op0); | |
d6a5ac33 | 7096 | |
bbf6f052 | 7097 | op0 = gen_label_rtx (); |
d6a5ac33 | 7098 | |
f81497d9 RS |
7099 | /* If this mode is an integer too wide to compare properly, |
7100 | compare word by word. Rely on cse to optimize constant cases. */ | |
d6a5ac33 | 7101 | if (GET_MODE_CLASS (mode) == MODE_INT && !can_compare_p (mode)) |
bbf6f052 | 7102 | { |
f81497d9 | 7103 | if (code == MAX_EXPR) |
d6a5ac33 RK |
7104 | do_jump_by_parts_greater_rtx (mode, TREE_UNSIGNED (type), |
7105 | target, op1, NULL_RTX, op0); | |
bbf6f052 | 7106 | else |
d6a5ac33 RK |
7107 | do_jump_by_parts_greater_rtx (mode, TREE_UNSIGNED (type), |
7108 | op1, target, NULL_RTX, op0); | |
ee456b1c | 7109 | emit_move_insn (target, op1); |
bbf6f052 | 7110 | } |
f81497d9 RS |
7111 | else |
7112 | { | |
7113 | if (code == MAX_EXPR) | |
7114 | temp = (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 1))) | |
ee456b1c RK |
7115 | ? compare_from_rtx (target, op1, GEU, 1, mode, NULL_RTX, 0) |
7116 | : compare_from_rtx (target, op1, GE, 0, mode, NULL_RTX, 0)); | |
f81497d9 RS |
7117 | else |
7118 | temp = (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 1))) | |
ee456b1c RK |
7119 | ? compare_from_rtx (target, op1, LEU, 1, mode, NULL_RTX, 0) |
7120 | : compare_from_rtx (target, op1, LE, 0, mode, NULL_RTX, 0)); | |
f81497d9 | 7121 | if (temp == const0_rtx) |
ee456b1c | 7122 | emit_move_insn (target, op1); |
f81497d9 RS |
7123 | else if (temp != const_true_rtx) |
7124 | { | |
7125 | if (bcc_gen_fctn[(int) GET_CODE (temp)] != 0) | |
7126 | emit_jump_insn ((*bcc_gen_fctn[(int) GET_CODE (temp)]) (op0)); | |
7127 | else | |
7128 | abort (); | |
ee456b1c | 7129 | emit_move_insn (target, op1); |
f81497d9 RS |
7130 | } |
7131 | } | |
bbf6f052 RK |
7132 | emit_label (op0); |
7133 | return target; | |
7134 | ||
bbf6f052 RK |
7135 | case BIT_NOT_EXPR: |
7136 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
7137 | temp = expand_unop (mode, one_cmpl_optab, op0, target, 1); | |
7138 | if (temp == 0) | |
7139 | abort (); | |
7140 | return temp; | |
7141 | ||
7142 | case FFS_EXPR: | |
7143 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
7144 | temp = expand_unop (mode, ffs_optab, op0, target, 1); | |
7145 | if (temp == 0) | |
7146 | abort (); | |
7147 | return temp; | |
7148 | ||
d6a5ac33 RK |
7149 | /* ??? Can optimize bitwise operations with one arg constant. |
7150 | Can optimize (a bitwise1 n) bitwise2 (a bitwise3 b) | |
7151 | and (a bitwise1 b) bitwise2 b (etc) | |
7152 | but that is probably not worth while. */ | |
7153 | ||
7154 | /* BIT_AND_EXPR is for bitwise anding. TRUTH_AND_EXPR is for anding two | |
7155 | boolean values when we want in all cases to compute both of them. In | |
7156 | general it is fastest to do TRUTH_AND_EXPR by computing both operands | |
7157 | as actual zero-or-1 values and then bitwise anding. In cases where | |
7158 | there cannot be any side effects, better code would be made by | |
7159 | treating TRUTH_AND_EXPR like TRUTH_ANDIF_EXPR; but the question is | |
7160 | how to recognize those cases. */ | |
7161 | ||
bbf6f052 RK |
7162 | case TRUTH_AND_EXPR: |
7163 | case BIT_AND_EXPR: | |
7164 | this_optab = and_optab; | |
7165 | goto binop; | |
7166 | ||
bbf6f052 RK |
7167 | case TRUTH_OR_EXPR: |
7168 | case BIT_IOR_EXPR: | |
7169 | this_optab = ior_optab; | |
7170 | goto binop; | |
7171 | ||
874726a8 | 7172 | case TRUTH_XOR_EXPR: |
bbf6f052 RK |
7173 | case BIT_XOR_EXPR: |
7174 | this_optab = xor_optab; | |
7175 | goto binop; | |
7176 | ||
7177 | case LSHIFT_EXPR: | |
7178 | case RSHIFT_EXPR: | |
7179 | case LROTATE_EXPR: | |
7180 | case RROTATE_EXPR: | |
7181 | preexpand_calls (exp); | |
e5e809f4 | 7182 | if (! safe_from_p (subtarget, TREE_OPERAND (exp, 1), 1)) |
bbf6f052 RK |
7183 | subtarget = 0; |
7184 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
7185 | return expand_shift (code, mode, op0, TREE_OPERAND (exp, 1), target, | |
7186 | unsignedp); | |
7187 | ||
d6a5ac33 RK |
7188 | /* Could determine the answer when only additive constants differ. Also, |
7189 | the addition of one can be handled by changing the condition. */ | |
bbf6f052 RK |
7190 | case LT_EXPR: |
7191 | case LE_EXPR: | |
7192 | case GT_EXPR: | |
7193 | case GE_EXPR: | |
7194 | case EQ_EXPR: | |
7195 | case NE_EXPR: | |
7196 | preexpand_calls (exp); | |
7197 | temp = do_store_flag (exp, target, tmode != VOIDmode ? tmode : mode, 0); | |
7198 | if (temp != 0) | |
7199 | return temp; | |
d6a5ac33 | 7200 | |
0f41302f | 7201 | /* For foo != 0, load foo, and if it is nonzero load 1 instead. */ |
bbf6f052 RK |
7202 | if (code == NE_EXPR && integer_zerop (TREE_OPERAND (exp, 1)) |
7203 | && original_target | |
7204 | && GET_CODE (original_target) == REG | |
7205 | && (GET_MODE (original_target) | |
7206 | == TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))))) | |
7207 | { | |
d6a5ac33 RK |
7208 | temp = expand_expr (TREE_OPERAND (exp, 0), original_target, |
7209 | VOIDmode, 0); | |
7210 | ||
bbf6f052 RK |
7211 | if (temp != original_target) |
7212 | temp = copy_to_reg (temp); | |
d6a5ac33 | 7213 | |
bbf6f052 | 7214 | op1 = gen_label_rtx (); |
906c4e36 | 7215 | emit_cmp_insn (temp, const0_rtx, EQ, NULL_RTX, |
bbf6f052 RK |
7216 | GET_MODE (temp), unsignedp, 0); |
7217 | emit_jump_insn (gen_beq (op1)); | |
7218 | emit_move_insn (temp, const1_rtx); | |
7219 | emit_label (op1); | |
7220 | return temp; | |
7221 | } | |
d6a5ac33 | 7222 | |
bbf6f052 RK |
7223 | /* If no set-flag instruction, must generate a conditional |
7224 | store into a temporary variable. Drop through | |
7225 | and handle this like && and ||. */ | |
7226 | ||
7227 | case TRUTH_ANDIF_EXPR: | |
7228 | case TRUTH_ORIF_EXPR: | |
e44842fe | 7229 | if (! ignore |
e5e809f4 | 7230 | && (target == 0 || ! safe_from_p (target, exp, 1) |
e44842fe RK |
7231 | /* Make sure we don't have a hard reg (such as function's return |
7232 | value) live across basic blocks, if not optimizing. */ | |
7233 | || (!optimize && GET_CODE (target) == REG | |
7234 | && REGNO (target) < FIRST_PSEUDO_REGISTER))) | |
bbf6f052 | 7235 | target = gen_reg_rtx (tmode != VOIDmode ? tmode : mode); |
e44842fe RK |
7236 | |
7237 | if (target) | |
7238 | emit_clr_insn (target); | |
7239 | ||
bbf6f052 RK |
7240 | op1 = gen_label_rtx (); |
7241 | jumpifnot (exp, op1); | |
e44842fe RK |
7242 | |
7243 | if (target) | |
7244 | emit_0_to_1_insn (target); | |
7245 | ||
bbf6f052 | 7246 | emit_label (op1); |
e44842fe | 7247 | return ignore ? const0_rtx : target; |
bbf6f052 RK |
7248 | |
7249 | case TRUTH_NOT_EXPR: | |
7250 | op0 = expand_expr (TREE_OPERAND (exp, 0), target, VOIDmode, 0); | |
7251 | /* The parser is careful to generate TRUTH_NOT_EXPR | |
7252 | only with operands that are always zero or one. */ | |
906c4e36 | 7253 | temp = expand_binop (mode, xor_optab, op0, const1_rtx, |
bbf6f052 RK |
7254 | target, 1, OPTAB_LIB_WIDEN); |
7255 | if (temp == 0) | |
7256 | abort (); | |
7257 | return temp; | |
7258 | ||
7259 | case COMPOUND_EXPR: | |
7260 | expand_expr (TREE_OPERAND (exp, 0), const0_rtx, VOIDmode, 0); | |
7261 | emit_queue (); | |
7262 | return expand_expr (TREE_OPERAND (exp, 1), | |
7263 | (ignore ? const0_rtx : target), | |
7264 | VOIDmode, 0); | |
7265 | ||
7266 | case COND_EXPR: | |
ac01eace RK |
7267 | /* If we would have a "singleton" (see below) were it not for a |
7268 | conversion in each arm, bring that conversion back out. */ | |
7269 | if (TREE_CODE (TREE_OPERAND (exp, 1)) == NOP_EXPR | |
7270 | && TREE_CODE (TREE_OPERAND (exp, 2)) == NOP_EXPR | |
7271 | && (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 1), 0)) | |
7272 | == TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 2), 0)))) | |
7273 | { | |
7274 | tree true = TREE_OPERAND (TREE_OPERAND (exp, 1), 0); | |
7275 | tree false = TREE_OPERAND (TREE_OPERAND (exp, 2), 0); | |
7276 | ||
7277 | if ((TREE_CODE_CLASS (TREE_CODE (true)) == '2' | |
7278 | && operand_equal_p (false, TREE_OPERAND (true, 0), 0)) | |
7279 | || (TREE_CODE_CLASS (TREE_CODE (false)) == '2' | |
7280 | && operand_equal_p (true, TREE_OPERAND (false, 0), 0)) | |
7281 | || (TREE_CODE_CLASS (TREE_CODE (true)) == '1' | |
7282 | && operand_equal_p (false, TREE_OPERAND (true, 0), 0)) | |
7283 | || (TREE_CODE_CLASS (TREE_CODE (false)) == '1' | |
7284 | && operand_equal_p (true, TREE_OPERAND (false, 0), 0))) | |
7285 | return expand_expr (build1 (NOP_EXPR, type, | |
7286 | build (COND_EXPR, TREE_TYPE (true), | |
7287 | TREE_OPERAND (exp, 0), | |
7288 | true, false)), | |
7289 | target, tmode, modifier); | |
7290 | } | |
7291 | ||
bbf6f052 RK |
7292 | { |
7293 | /* Note that COND_EXPRs whose type is a structure or union | |
7294 | are required to be constructed to contain assignments of | |
7295 | a temporary variable, so that we can evaluate them here | |
7296 | for side effect only. If type is void, we must do likewise. */ | |
7297 | ||
7298 | /* If an arm of the branch requires a cleanup, | |
7299 | only that cleanup is performed. */ | |
7300 | ||
7301 | tree singleton = 0; | |
7302 | tree binary_op = 0, unary_op = 0; | |
bbf6f052 RK |
7303 | |
7304 | /* If this is (A ? 1 : 0) and A is a condition, just evaluate it and | |
7305 | convert it to our mode, if necessary. */ | |
7306 | if (integer_onep (TREE_OPERAND (exp, 1)) | |
7307 | && integer_zerop (TREE_OPERAND (exp, 2)) | |
7308 | && TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 0))) == '<') | |
7309 | { | |
dd27116b RK |
7310 | if (ignore) |
7311 | { | |
7312 | expand_expr (TREE_OPERAND (exp, 0), const0_rtx, VOIDmode, | |
921b3427 | 7313 | ro_modifier); |
dd27116b RK |
7314 | return const0_rtx; |
7315 | } | |
7316 | ||
921b3427 | 7317 | op0 = expand_expr (TREE_OPERAND (exp, 0), target, mode, ro_modifier); |
bbf6f052 RK |
7318 | if (GET_MODE (op0) == mode) |
7319 | return op0; | |
d6a5ac33 | 7320 | |
bbf6f052 RK |
7321 | if (target == 0) |
7322 | target = gen_reg_rtx (mode); | |
7323 | convert_move (target, op0, unsignedp); | |
7324 | return target; | |
7325 | } | |
7326 | ||
ac01eace RK |
7327 | /* Check for X ? A + B : A. If we have this, we can copy A to the |
7328 | output and conditionally add B. Similarly for unary operations. | |
7329 | Don't do this if X has side-effects because those side effects | |
7330 | might affect A or B and the "?" operation is a sequence point in | |
7331 | ANSI. (operand_equal_p tests for side effects.) */ | |
bbf6f052 RK |
7332 | |
7333 | if (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 1))) == '2' | |
7334 | && operand_equal_p (TREE_OPERAND (exp, 2), | |
7335 | TREE_OPERAND (TREE_OPERAND (exp, 1), 0), 0)) | |
7336 | singleton = TREE_OPERAND (exp, 2), binary_op = TREE_OPERAND (exp, 1); | |
7337 | else if (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 2))) == '2' | |
7338 | && operand_equal_p (TREE_OPERAND (exp, 1), | |
7339 | TREE_OPERAND (TREE_OPERAND (exp, 2), 0), 0)) | |
7340 | singleton = TREE_OPERAND (exp, 1), binary_op = TREE_OPERAND (exp, 2); | |
7341 | else if (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 1))) == '1' | |
7342 | && operand_equal_p (TREE_OPERAND (exp, 2), | |
7343 | TREE_OPERAND (TREE_OPERAND (exp, 1), 0), 0)) | |
7344 | singleton = TREE_OPERAND (exp, 2), unary_op = TREE_OPERAND (exp, 1); | |
7345 | else if (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 2))) == '1' | |
7346 | && operand_equal_p (TREE_OPERAND (exp, 1), | |
7347 | TREE_OPERAND (TREE_OPERAND (exp, 2), 0), 0)) | |
7348 | singleton = TREE_OPERAND (exp, 1), unary_op = TREE_OPERAND (exp, 2); | |
7349 | ||
01c8a7c8 RK |
7350 | /* If we are not to produce a result, we have no target. Otherwise, |
7351 | if a target was specified use it; it will not be used as an | |
7352 | intermediate target unless it is safe. If no target, use a | |
7353 | temporary. */ | |
7354 | ||
7355 | if (ignore) | |
7356 | temp = 0; | |
7357 | else if (original_target | |
e5e809f4 | 7358 | && (safe_from_p (original_target, TREE_OPERAND (exp, 0), 1) |
01c8a7c8 RK |
7359 | || (singleton && GET_CODE (original_target) == REG |
7360 | && REGNO (original_target) >= FIRST_PSEUDO_REGISTER | |
7361 | && original_target == var_rtx (singleton))) | |
7362 | && GET_MODE (original_target) == mode | |
7c00d1fe RK |
7363 | #ifdef HAVE_conditional_move |
7364 | && (! can_conditionally_move_p (mode) | |
7365 | || GET_CODE (original_target) == REG | |
7366 | || TREE_ADDRESSABLE (type)) | |
7367 | #endif | |
01c8a7c8 RK |
7368 | && ! (GET_CODE (original_target) == MEM |
7369 | && MEM_VOLATILE_P (original_target))) | |
7370 | temp = original_target; | |
7371 | else if (TREE_ADDRESSABLE (type)) | |
7372 | abort (); | |
7373 | else | |
7374 | temp = assign_temp (type, 0, 0, 1); | |
7375 | ||
ac01eace RK |
7376 | /* If we had X ? A + C : A, with C a constant power of 2, and we can |
7377 | do the test of X as a store-flag operation, do this as | |
7378 | A + ((X != 0) << log C). Similarly for other simple binary | |
7379 | operators. Only do for C == 1 if BRANCH_COST is low. */ | |
dd27116b | 7380 | if (temp && singleton && binary_op |
bbf6f052 RK |
7381 | && (TREE_CODE (binary_op) == PLUS_EXPR |
7382 | || TREE_CODE (binary_op) == MINUS_EXPR | |
7383 | || TREE_CODE (binary_op) == BIT_IOR_EXPR | |
9fbd9f58 | 7384 | || TREE_CODE (binary_op) == BIT_XOR_EXPR) |
ac01eace RK |
7385 | && (BRANCH_COST >= 3 ? integer_pow2p (TREE_OPERAND (binary_op, 1)) |
7386 | : integer_onep (TREE_OPERAND (binary_op, 1))) | |
bbf6f052 RK |
7387 | && TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 0))) == '<') |
7388 | { | |
7389 | rtx result; | |
7390 | optab boptab = (TREE_CODE (binary_op) == PLUS_EXPR ? add_optab | |
7391 | : TREE_CODE (binary_op) == MINUS_EXPR ? sub_optab | |
7392 | : TREE_CODE (binary_op) == BIT_IOR_EXPR ? ior_optab | |
2d444001 | 7393 | : xor_optab); |
bbf6f052 RK |
7394 | |
7395 | /* If we had X ? A : A + 1, do this as A + (X == 0). | |
7396 | ||
7397 | We have to invert the truth value here and then put it | |
7398 | back later if do_store_flag fails. We cannot simply copy | |
7399 | TREE_OPERAND (exp, 0) to another variable and modify that | |
7400 | because invert_truthvalue can modify the tree pointed to | |
7401 | by its argument. */ | |
7402 | if (singleton == TREE_OPERAND (exp, 1)) | |
7403 | TREE_OPERAND (exp, 0) | |
7404 | = invert_truthvalue (TREE_OPERAND (exp, 0)); | |
7405 | ||
7406 | result = do_store_flag (TREE_OPERAND (exp, 0), | |
e5e809f4 | 7407 | (safe_from_p (temp, singleton, 1) |
906c4e36 | 7408 | ? temp : NULL_RTX), |
bbf6f052 RK |
7409 | mode, BRANCH_COST <= 1); |
7410 | ||
ac01eace RK |
7411 | if (result != 0 && ! integer_onep (TREE_OPERAND (binary_op, 1))) |
7412 | result = expand_shift (LSHIFT_EXPR, mode, result, | |
7413 | build_int_2 (tree_log2 | |
7414 | (TREE_OPERAND | |
7415 | (binary_op, 1)), | |
7416 | 0), | |
e5e809f4 | 7417 | (safe_from_p (temp, singleton, 1) |
ac01eace RK |
7418 | ? temp : NULL_RTX), 0); |
7419 | ||
bbf6f052 RK |
7420 | if (result) |
7421 | { | |
906c4e36 | 7422 | op1 = expand_expr (singleton, NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
7423 | return expand_binop (mode, boptab, op1, result, temp, |
7424 | unsignedp, OPTAB_LIB_WIDEN); | |
7425 | } | |
7426 | else if (singleton == TREE_OPERAND (exp, 1)) | |
7427 | TREE_OPERAND (exp, 0) | |
7428 | = invert_truthvalue (TREE_OPERAND (exp, 0)); | |
7429 | } | |
7430 | ||
dabf8373 | 7431 | do_pending_stack_adjust (); |
bbf6f052 RK |
7432 | NO_DEFER_POP; |
7433 | op0 = gen_label_rtx (); | |
7434 | ||
7435 | if (singleton && ! TREE_SIDE_EFFECTS (TREE_OPERAND (exp, 0))) | |
7436 | { | |
7437 | if (temp != 0) | |
7438 | { | |
7439 | /* If the target conflicts with the other operand of the | |
7440 | binary op, we can't use it. Also, we can't use the target | |
7441 | if it is a hard register, because evaluating the condition | |
7442 | might clobber it. */ | |
7443 | if ((binary_op | |
e5e809f4 | 7444 | && ! safe_from_p (temp, TREE_OPERAND (binary_op, 1), 1)) |
bbf6f052 RK |
7445 | || (GET_CODE (temp) == REG |
7446 | && REGNO (temp) < FIRST_PSEUDO_REGISTER)) | |
7447 | temp = gen_reg_rtx (mode); | |
7448 | store_expr (singleton, temp, 0); | |
7449 | } | |
7450 | else | |
906c4e36 | 7451 | expand_expr (singleton, |
2937cf87 | 7452 | ignore ? const0_rtx : NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
7453 | if (singleton == TREE_OPERAND (exp, 1)) |
7454 | jumpif (TREE_OPERAND (exp, 0), op0); | |
7455 | else | |
7456 | jumpifnot (TREE_OPERAND (exp, 0), op0); | |
7457 | ||
956d6950 | 7458 | start_cleanup_deferral (); |
bbf6f052 RK |
7459 | if (binary_op && temp == 0) |
7460 | /* Just touch the other operand. */ | |
7461 | expand_expr (TREE_OPERAND (binary_op, 1), | |
906c4e36 | 7462 | ignore ? const0_rtx : NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
7463 | else if (binary_op) |
7464 | store_expr (build (TREE_CODE (binary_op), type, | |
7465 | make_tree (type, temp), | |
7466 | TREE_OPERAND (binary_op, 1)), | |
7467 | temp, 0); | |
7468 | else | |
7469 | store_expr (build1 (TREE_CODE (unary_op), type, | |
7470 | make_tree (type, temp)), | |
7471 | temp, 0); | |
7472 | op1 = op0; | |
bbf6f052 | 7473 | } |
bbf6f052 RK |
7474 | /* Check for A op 0 ? A : FOO and A op 0 ? FOO : A where OP is any |
7475 | comparison operator. If we have one of these cases, set the | |
7476 | output to A, branch on A (cse will merge these two references), | |
7477 | then set the output to FOO. */ | |
7478 | else if (temp | |
7479 | && TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 0))) == '<' | |
7480 | && integer_zerop (TREE_OPERAND (TREE_OPERAND (exp, 0), 1)) | |
7481 | && operand_equal_p (TREE_OPERAND (TREE_OPERAND (exp, 0), 0), | |
7482 | TREE_OPERAND (exp, 1), 0) | |
e9a25f70 JL |
7483 | && (! TREE_SIDE_EFFECTS (TREE_OPERAND (exp, 0)) |
7484 | || TREE_CODE (TREE_OPERAND (exp, 1)) == SAVE_EXPR) | |
e5e809f4 | 7485 | && safe_from_p (temp, TREE_OPERAND (exp, 2), 1)) |
bbf6f052 RK |
7486 | { |
7487 | if (GET_CODE (temp) == REG && REGNO (temp) < FIRST_PSEUDO_REGISTER) | |
7488 | temp = gen_reg_rtx (mode); | |
7489 | store_expr (TREE_OPERAND (exp, 1), temp, 0); | |
7490 | jumpif (TREE_OPERAND (exp, 0), op0); | |
5dab5552 | 7491 | |
956d6950 | 7492 | start_cleanup_deferral (); |
bbf6f052 RK |
7493 | store_expr (TREE_OPERAND (exp, 2), temp, 0); |
7494 | op1 = op0; | |
7495 | } | |
7496 | else if (temp | |
7497 | && TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 0))) == '<' | |
7498 | && integer_zerop (TREE_OPERAND (TREE_OPERAND (exp, 0), 1)) | |
7499 | && operand_equal_p (TREE_OPERAND (TREE_OPERAND (exp, 0), 0), | |
7500 | TREE_OPERAND (exp, 2), 0) | |
e9a25f70 JL |
7501 | && (! TREE_SIDE_EFFECTS (TREE_OPERAND (exp, 0)) |
7502 | || TREE_CODE (TREE_OPERAND (exp, 2)) == SAVE_EXPR) | |
e5e809f4 | 7503 | && safe_from_p (temp, TREE_OPERAND (exp, 1), 1)) |
bbf6f052 RK |
7504 | { |
7505 | if (GET_CODE (temp) == REG && REGNO (temp) < FIRST_PSEUDO_REGISTER) | |
7506 | temp = gen_reg_rtx (mode); | |
7507 | store_expr (TREE_OPERAND (exp, 2), temp, 0); | |
7508 | jumpifnot (TREE_OPERAND (exp, 0), op0); | |
5dab5552 | 7509 | |
956d6950 | 7510 | start_cleanup_deferral (); |
bbf6f052 RK |
7511 | store_expr (TREE_OPERAND (exp, 1), temp, 0); |
7512 | op1 = op0; | |
7513 | } | |
7514 | else | |
7515 | { | |
7516 | op1 = gen_label_rtx (); | |
7517 | jumpifnot (TREE_OPERAND (exp, 0), op0); | |
5dab5552 | 7518 | |
956d6950 | 7519 | start_cleanup_deferral (); |
bbf6f052 RK |
7520 | if (temp != 0) |
7521 | store_expr (TREE_OPERAND (exp, 1), temp, 0); | |
7522 | else | |
906c4e36 RK |
7523 | expand_expr (TREE_OPERAND (exp, 1), |
7524 | ignore ? const0_rtx : NULL_RTX, VOIDmode, 0); | |
956d6950 | 7525 | end_cleanup_deferral (); |
bbf6f052 RK |
7526 | emit_queue (); |
7527 | emit_jump_insn (gen_jump (op1)); | |
7528 | emit_barrier (); | |
7529 | emit_label (op0); | |
956d6950 | 7530 | start_cleanup_deferral (); |
bbf6f052 RK |
7531 | if (temp != 0) |
7532 | store_expr (TREE_OPERAND (exp, 2), temp, 0); | |
7533 | else | |
906c4e36 RK |
7534 | expand_expr (TREE_OPERAND (exp, 2), |
7535 | ignore ? const0_rtx : NULL_RTX, VOIDmode, 0); | |
bbf6f052 RK |
7536 | } |
7537 | ||
956d6950 | 7538 | end_cleanup_deferral (); |
bbf6f052 RK |
7539 | |
7540 | emit_queue (); | |
7541 | emit_label (op1); | |
7542 | OK_DEFER_POP; | |
5dab5552 | 7543 | |
bbf6f052 RK |
7544 | return temp; |
7545 | } | |
7546 | ||
7547 | case TARGET_EXPR: | |
7548 | { | |
7549 | /* Something needs to be initialized, but we didn't know | |
7550 | where that thing was when building the tree. For example, | |
7551 | it could be the return value of a function, or a parameter | |
7552 | to a function which lays down in the stack, or a temporary | |
7553 | variable which must be passed by reference. | |
7554 | ||
7555 | We guarantee that the expression will either be constructed | |
7556 | or copied into our original target. */ | |
7557 | ||
7558 | tree slot = TREE_OPERAND (exp, 0); | |
2a888d4c | 7559 | tree cleanups = NULL_TREE; |
5c062816 | 7560 | tree exp1; |
bbf6f052 RK |
7561 | |
7562 | if (TREE_CODE (slot) != VAR_DECL) | |
7563 | abort (); | |
7564 | ||
9c51f375 RK |
7565 | if (! ignore) |
7566 | target = original_target; | |
7567 | ||
bbf6f052 RK |
7568 | if (target == 0) |
7569 | { | |
7570 | if (DECL_RTL (slot) != 0) | |
ac993f4f MS |
7571 | { |
7572 | target = DECL_RTL (slot); | |
5c062816 | 7573 | /* If we have already expanded the slot, so don't do |
ac993f4f | 7574 | it again. (mrs) */ |
5c062816 MS |
7575 | if (TREE_OPERAND (exp, 1) == NULL_TREE) |
7576 | return target; | |
ac993f4f | 7577 | } |
bbf6f052 RK |
7578 | else |
7579 | { | |
e9a25f70 | 7580 | target = assign_temp (type, 2, 0, 1); |
bbf6f052 RK |
7581 | /* All temp slots at this level must not conflict. */ |
7582 | preserve_temp_slots (target); | |
7583 | DECL_RTL (slot) = target; | |
e9a25f70 JL |
7584 | if (TREE_ADDRESSABLE (slot)) |
7585 | { | |
7586 | TREE_ADDRESSABLE (slot) = 0; | |
7587 | mark_addressable (slot); | |
7588 | } | |
bbf6f052 | 7589 | |
e287fd6e RK |
7590 | /* Since SLOT is not known to the called function |
7591 | to belong to its stack frame, we must build an explicit | |
7592 | cleanup. This case occurs when we must build up a reference | |
7593 | to pass the reference as an argument. In this case, | |
7594 | it is very likely that such a reference need not be | |
7595 | built here. */ | |
7596 | ||
7597 | if (TREE_OPERAND (exp, 2) == 0) | |
7598 | TREE_OPERAND (exp, 2) = maybe_build_cleanup (slot); | |
2a888d4c | 7599 | cleanups = TREE_OPERAND (exp, 2); |
e287fd6e | 7600 | } |
bbf6f052 RK |
7601 | } |
7602 | else | |
7603 | { | |
7604 | /* This case does occur, when expanding a parameter which | |
7605 | needs to be constructed on the stack. The target | |
7606 | is the actual stack address that we want to initialize. | |
7607 | The function we call will perform the cleanup in this case. */ | |
7608 | ||
8c042b47 RS |
7609 | /* If we have already assigned it space, use that space, |
7610 | not target that we were passed in, as our target | |
7611 | parameter is only a hint. */ | |
7612 | if (DECL_RTL (slot) != 0) | |
7613 | { | |
7614 | target = DECL_RTL (slot); | |
7615 | /* If we have already expanded the slot, so don't do | |
7616 | it again. (mrs) */ | |
7617 | if (TREE_OPERAND (exp, 1) == NULL_TREE) | |
7618 | return target; | |
7619 | } | |
21002281 JW |
7620 | else |
7621 | { | |
7622 | DECL_RTL (slot) = target; | |
7623 | /* If we must have an addressable slot, then make sure that | |
7624 | the RTL that we just stored in slot is OK. */ | |
7625 | if (TREE_ADDRESSABLE (slot)) | |
7626 | { | |
7627 | TREE_ADDRESSABLE (slot) = 0; | |
7628 | mark_addressable (slot); | |
7629 | } | |
7630 | } | |
bbf6f052 RK |
7631 | } |
7632 | ||
4847c938 | 7633 | exp1 = TREE_OPERAND (exp, 3) = TREE_OPERAND (exp, 1); |
5c062816 MS |
7634 | /* Mark it as expanded. */ |
7635 | TREE_OPERAND (exp, 1) = NULL_TREE; | |
7636 | ||
e5e809f4 | 7637 | TREE_USED (slot) = 1; |
41531e5b | 7638 | store_expr (exp1, target, 0); |
61d6b1cc | 7639 | |
e976b8b2 | 7640 | expand_decl_cleanup (NULL_TREE, cleanups); |
61d6b1cc | 7641 | |
41531e5b | 7642 | return target; |
bbf6f052 RK |
7643 | } |
7644 | ||
7645 | case INIT_EXPR: | |
7646 | { | |
7647 | tree lhs = TREE_OPERAND (exp, 0); | |
7648 | tree rhs = TREE_OPERAND (exp, 1); | |
7649 | tree noncopied_parts = 0; | |
7650 | tree lhs_type = TREE_TYPE (lhs); | |
7651 | ||
7652 | temp = expand_assignment (lhs, rhs, ! ignore, original_target != 0); | |
7653 | if (TYPE_NONCOPIED_PARTS (lhs_type) != 0 && !fixed_type_p (rhs)) | |
7654 | noncopied_parts = init_noncopied_parts (stabilize_reference (lhs), | |
7655 | TYPE_NONCOPIED_PARTS (lhs_type)); | |
7656 | while (noncopied_parts != 0) | |
7657 | { | |
7658 | expand_assignment (TREE_VALUE (noncopied_parts), | |
7659 | TREE_PURPOSE (noncopied_parts), 0, 0); | |
7660 | noncopied_parts = TREE_CHAIN (noncopied_parts); | |
7661 | } | |
7662 | return temp; | |
7663 | } | |
7664 | ||
7665 | case MODIFY_EXPR: | |
7666 | { | |
7667 | /* If lhs is complex, expand calls in rhs before computing it. | |
7668 | That's so we don't compute a pointer and save it over a call. | |
7669 | If lhs is simple, compute it first so we can give it as a | |
7670 | target if the rhs is just a call. This avoids an extra temp and copy | |
7671 | and that prevents a partial-subsumption which makes bad code. | |
7672 | Actually we could treat component_ref's of vars like vars. */ | |
7673 | ||
7674 | tree lhs = TREE_OPERAND (exp, 0); | |
7675 | tree rhs = TREE_OPERAND (exp, 1); | |
7676 | tree noncopied_parts = 0; | |
7677 | tree lhs_type = TREE_TYPE (lhs); | |
7678 | ||
7679 | temp = 0; | |
7680 | ||
7681 | if (TREE_CODE (lhs) != VAR_DECL | |
7682 | && TREE_CODE (lhs) != RESULT_DECL | |
b60334e8 RK |
7683 | && TREE_CODE (lhs) != PARM_DECL |
7684 | && ! (TREE_CODE (lhs) == INDIRECT_REF | |
7685 | && TYPE_READONLY (TREE_TYPE (TREE_OPERAND (lhs, 0))))) | |
bbf6f052 RK |
7686 | preexpand_calls (exp); |
7687 | ||
7688 | /* Check for |= or &= of a bitfield of size one into another bitfield | |
7689 | of size 1. In this case, (unless we need the result of the | |
7690 | assignment) we can do this more efficiently with a | |
7691 | test followed by an assignment, if necessary. | |
7692 | ||
7693 | ??? At this point, we can't get a BIT_FIELD_REF here. But if | |
7694 | things change so we do, this code should be enhanced to | |
7695 | support it. */ | |
7696 | if (ignore | |
7697 | && TREE_CODE (lhs) == COMPONENT_REF | |
7698 | && (TREE_CODE (rhs) == BIT_IOR_EXPR | |
7699 | || TREE_CODE (rhs) == BIT_AND_EXPR) | |
7700 | && TREE_OPERAND (rhs, 0) == lhs | |
7701 | && TREE_CODE (TREE_OPERAND (rhs, 1)) == COMPONENT_REF | |
7702 | && TREE_INT_CST_LOW (DECL_SIZE (TREE_OPERAND (lhs, 1))) == 1 | |
7703 | && TREE_INT_CST_LOW (DECL_SIZE (TREE_OPERAND (TREE_OPERAND (rhs, 1), 1))) == 1) | |
7704 | { | |
7705 | rtx label = gen_label_rtx (); | |
7706 | ||
7707 | do_jump (TREE_OPERAND (rhs, 1), | |
7708 | TREE_CODE (rhs) == BIT_IOR_EXPR ? label : 0, | |
7709 | TREE_CODE (rhs) == BIT_AND_EXPR ? label : 0); | |
7710 | expand_assignment (lhs, convert (TREE_TYPE (rhs), | |
7711 | (TREE_CODE (rhs) == BIT_IOR_EXPR | |
7712 | ? integer_one_node | |
7713 | : integer_zero_node)), | |
7714 | 0, 0); | |
e7c33f54 | 7715 | do_pending_stack_adjust (); |
bbf6f052 RK |
7716 | emit_label (label); |
7717 | return const0_rtx; | |
7718 | } | |
7719 | ||
7720 | if (TYPE_NONCOPIED_PARTS (lhs_type) != 0 | |
7721 | && ! (fixed_type_p (lhs) && fixed_type_p (rhs))) | |
7722 | noncopied_parts = save_noncopied_parts (stabilize_reference (lhs), | |
7723 | TYPE_NONCOPIED_PARTS (lhs_type)); | |
7724 | ||
7725 | temp = expand_assignment (lhs, rhs, ! ignore, original_target != 0); | |
7726 | while (noncopied_parts != 0) | |
7727 | { | |
7728 | expand_assignment (TREE_PURPOSE (noncopied_parts), | |
7729 | TREE_VALUE (noncopied_parts), 0, 0); | |
7730 | noncopied_parts = TREE_CHAIN (noncopied_parts); | |
7731 | } | |
7732 | return temp; | |
7733 | } | |
7734 | ||
6e7f84a7 APB |
7735 | case RETURN_EXPR: |
7736 | if (!TREE_OPERAND (exp, 0)) | |
7737 | expand_null_return (); | |
7738 | else | |
7739 | expand_return (TREE_OPERAND (exp, 0)); | |
7740 | return const0_rtx; | |
7741 | ||
bbf6f052 RK |
7742 | case PREINCREMENT_EXPR: |
7743 | case PREDECREMENT_EXPR: | |
7b8b9722 | 7744 | return expand_increment (exp, 0, ignore); |
bbf6f052 RK |
7745 | |
7746 | case POSTINCREMENT_EXPR: | |
7747 | case POSTDECREMENT_EXPR: | |
7748 | /* Faster to treat as pre-increment if result is not used. */ | |
7b8b9722 | 7749 | return expand_increment (exp, ! ignore, ignore); |
bbf6f052 RK |
7750 | |
7751 | case ADDR_EXPR: | |
987c71d9 | 7752 | /* If nonzero, TEMP will be set to the address of something that might |
0f41302f | 7753 | be a MEM corresponding to a stack slot. */ |
987c71d9 RK |
7754 | temp = 0; |
7755 | ||
bbf6f052 RK |
7756 | /* Are we taking the address of a nested function? */ |
7757 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == FUNCTION_DECL | |
38ee6ed9 | 7758 | && decl_function_context (TREE_OPERAND (exp, 0)) != 0 |
e5e809f4 JL |
7759 | && ! DECL_NO_STATIC_CHAIN (TREE_OPERAND (exp, 0)) |
7760 | && ! TREE_STATIC (exp)) | |
bbf6f052 RK |
7761 | { |
7762 | op0 = trampoline_address (TREE_OPERAND (exp, 0)); | |
7763 | op0 = force_operand (op0, target); | |
7764 | } | |
682ba3a6 RK |
7765 | /* If we are taking the address of something erroneous, just |
7766 | return a zero. */ | |
7767 | else if (TREE_CODE (TREE_OPERAND (exp, 0)) == ERROR_MARK) | |
7768 | return const0_rtx; | |
bbf6f052 RK |
7769 | else |
7770 | { | |
e287fd6e RK |
7771 | /* We make sure to pass const0_rtx down if we came in with |
7772 | ignore set, to avoid doing the cleanups twice for something. */ | |
7773 | op0 = expand_expr (TREE_OPERAND (exp, 0), | |
7774 | ignore ? const0_rtx : NULL_RTX, VOIDmode, | |
bbf6f052 RK |
7775 | (modifier == EXPAND_INITIALIZER |
7776 | ? modifier : EXPAND_CONST_ADDRESS)); | |
896102d0 | 7777 | |
119af78a RK |
7778 | /* If we are going to ignore the result, OP0 will have been set |
7779 | to const0_rtx, so just return it. Don't get confused and | |
7780 | think we are taking the address of the constant. */ | |
7781 | if (ignore) | |
7782 | return op0; | |
7783 | ||
3539e816 MS |
7784 | op0 = protect_from_queue (op0, 0); |
7785 | ||
896102d0 RK |
7786 | /* We would like the object in memory. If it is a constant, |
7787 | we can have it be statically allocated into memory. For | |
682ba3a6 | 7788 | a non-constant (REG, SUBREG or CONCAT), we need to allocate some |
896102d0 RK |
7789 | memory and store the value into it. */ |
7790 | ||
7791 | if (CONSTANT_P (op0)) | |
7792 | op0 = force_const_mem (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))), | |
7793 | op0); | |
987c71d9 | 7794 | else if (GET_CODE (op0) == MEM) |
af5b53ed RK |
7795 | { |
7796 | mark_temp_addr_taken (op0); | |
7797 | temp = XEXP (op0, 0); | |
7798 | } | |
896102d0 | 7799 | |
682ba3a6 | 7800 | else if (GET_CODE (op0) == REG || GET_CODE (op0) == SUBREG |
6c8538cc | 7801 | || GET_CODE (op0) == CONCAT || GET_CODE (op0) == ADDRESSOF) |
896102d0 RK |
7802 | { |
7803 | /* If this object is in a register, it must be not | |
0f41302f | 7804 | be BLKmode. */ |
896102d0 | 7805 | tree inner_type = TREE_TYPE (TREE_OPERAND (exp, 0)); |
06089a8b | 7806 | rtx memloc = assign_temp (inner_type, 1, 1, 1); |
896102d0 | 7807 | |
7a0b7b9a | 7808 | mark_temp_addr_taken (memloc); |
896102d0 RK |
7809 | emit_move_insn (memloc, op0); |
7810 | op0 = memloc; | |
7811 | } | |
7812 | ||
bbf6f052 RK |
7813 | if (GET_CODE (op0) != MEM) |
7814 | abort (); | |
7815 | ||
7816 | if (modifier == EXPAND_SUM || modifier == EXPAND_INITIALIZER) | |
88f63c77 RK |
7817 | { |
7818 | temp = XEXP (op0, 0); | |
7819 | #ifdef POINTERS_EXTEND_UNSIGNED | |
7820 | if (GET_MODE (temp) == Pmode && GET_MODE (temp) != mode | |
7821 | && mode == ptr_mode) | |
9fcfcce7 | 7822 | temp = convert_memory_address (ptr_mode, temp); |
88f63c77 RK |
7823 | #endif |
7824 | return temp; | |
7825 | } | |
987c71d9 | 7826 | |
bbf6f052 RK |
7827 | op0 = force_operand (XEXP (op0, 0), target); |
7828 | } | |
987c71d9 | 7829 | |
bbf6f052 | 7830 | if (flag_force_addr && GET_CODE (op0) != REG) |
987c71d9 RK |
7831 | op0 = force_reg (Pmode, op0); |
7832 | ||
dc6d66b3 RK |
7833 | if (GET_CODE (op0) == REG |
7834 | && ! REG_USERVAR_P (op0)) | |
7835 | mark_reg_pointer (op0, TYPE_ALIGN (TREE_TYPE (type)) / BITS_PER_UNIT); | |
987c71d9 RK |
7836 | |
7837 | /* If we might have had a temp slot, add an equivalent address | |
7838 | for it. */ | |
7839 | if (temp != 0) | |
7840 | update_temp_slot_address (temp, op0); | |
7841 | ||
88f63c77 RK |
7842 | #ifdef POINTERS_EXTEND_UNSIGNED |
7843 | if (GET_MODE (op0) == Pmode && GET_MODE (op0) != mode | |
7844 | && mode == ptr_mode) | |
9fcfcce7 | 7845 | op0 = convert_memory_address (ptr_mode, op0); |
88f63c77 RK |
7846 | #endif |
7847 | ||
bbf6f052 RK |
7848 | return op0; |
7849 | ||
7850 | case ENTRY_VALUE_EXPR: | |
7851 | abort (); | |
7852 | ||
7308a047 RS |
7853 | /* COMPLEX type for Extended Pascal & Fortran */ |
7854 | case COMPLEX_EXPR: | |
7855 | { | |
7856 | enum machine_mode mode = TYPE_MODE (TREE_TYPE (TREE_TYPE (exp))); | |
6551fa4d | 7857 | rtx insns; |
7308a047 RS |
7858 | |
7859 | /* Get the rtx code of the operands. */ | |
7860 | op0 = expand_expr (TREE_OPERAND (exp, 0), 0, VOIDmode, 0); | |
7861 | op1 = expand_expr (TREE_OPERAND (exp, 1), 0, VOIDmode, 0); | |
7862 | ||
7863 | if (! target) | |
7864 | target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp))); | |
7865 | ||
6551fa4d | 7866 | start_sequence (); |
7308a047 RS |
7867 | |
7868 | /* Move the real (op0) and imaginary (op1) parts to their location. */ | |
2d7050fd RS |
7869 | emit_move_insn (gen_realpart (mode, target), op0); |
7870 | emit_move_insn (gen_imagpart (mode, target), op1); | |
7308a047 | 7871 | |
6551fa4d JW |
7872 | insns = get_insns (); |
7873 | end_sequence (); | |
7874 | ||
7308a047 | 7875 | /* Complex construction should appear as a single unit. */ |
6551fa4d JW |
7876 | /* If TARGET is a CONCAT, we got insns like RD = RS, ID = IS, |
7877 | each with a separate pseudo as destination. | |
7878 | It's not correct for flow to treat them as a unit. */ | |
6d6e61ce | 7879 | if (GET_CODE (target) != CONCAT) |
6551fa4d JW |
7880 | emit_no_conflict_block (insns, target, op0, op1, NULL_RTX); |
7881 | else | |
7882 | emit_insns (insns); | |
7308a047 RS |
7883 | |
7884 | return target; | |
7885 | } | |
7886 | ||
7887 | case REALPART_EXPR: | |
2d7050fd RS |
7888 | op0 = expand_expr (TREE_OPERAND (exp, 0), 0, VOIDmode, 0); |
7889 | return gen_realpart (mode, op0); | |
7308a047 RS |
7890 | |
7891 | case IMAGPART_EXPR: | |
2d7050fd RS |
7892 | op0 = expand_expr (TREE_OPERAND (exp, 0), 0, VOIDmode, 0); |
7893 | return gen_imagpart (mode, op0); | |
7308a047 RS |
7894 | |
7895 | case CONJ_EXPR: | |
7896 | { | |
62acb978 | 7897 | enum machine_mode partmode = TYPE_MODE (TREE_TYPE (TREE_TYPE (exp))); |
7308a047 | 7898 | rtx imag_t; |
6551fa4d | 7899 | rtx insns; |
7308a047 RS |
7900 | |
7901 | op0 = expand_expr (TREE_OPERAND (exp, 0), 0, VOIDmode, 0); | |
7902 | ||
7903 | if (! target) | |
d6a5ac33 | 7904 | target = gen_reg_rtx (mode); |
7308a047 | 7905 | |
6551fa4d | 7906 | start_sequence (); |
7308a047 RS |
7907 | |
7908 | /* Store the realpart and the negated imagpart to target. */ | |
62acb978 RK |
7909 | emit_move_insn (gen_realpart (partmode, target), |
7910 | gen_realpart (partmode, op0)); | |
7308a047 | 7911 | |
62acb978 RK |
7912 | imag_t = gen_imagpart (partmode, target); |
7913 | temp = expand_unop (partmode, neg_optab, | |
7914 | gen_imagpart (partmode, op0), imag_t, 0); | |
7308a047 RS |
7915 | if (temp != imag_t) |
7916 | emit_move_insn (imag_t, temp); | |
7917 | ||
6551fa4d JW |
7918 | insns = get_insns (); |
7919 | end_sequence (); | |
7920 | ||
d6a5ac33 RK |
7921 | /* Conjugate should appear as a single unit |
7922 | If TARGET is a CONCAT, we got insns like RD = RS, ID = - IS, | |
6551fa4d JW |
7923 | each with a separate pseudo as destination. |
7924 | It's not correct for flow to treat them as a unit. */ | |
6d6e61ce | 7925 | if (GET_CODE (target) != CONCAT) |
6551fa4d JW |
7926 | emit_no_conflict_block (insns, target, op0, NULL_RTX, NULL_RTX); |
7927 | else | |
7928 | emit_insns (insns); | |
7308a047 RS |
7929 | |
7930 | return target; | |
7931 | } | |
7932 | ||
e976b8b2 MS |
7933 | case TRY_CATCH_EXPR: |
7934 | { | |
7935 | tree handler = TREE_OPERAND (exp, 1); | |
7936 | ||
7937 | expand_eh_region_start (); | |
7938 | ||
7939 | op0 = expand_expr (TREE_OPERAND (exp, 0), 0, VOIDmode, 0); | |
7940 | ||
7941 | expand_eh_region_end (handler); | |
7942 | ||
7943 | return op0; | |
7944 | } | |
7945 | ||
7946 | case POPDCC_EXPR: | |
7947 | { | |
7948 | rtx dcc = get_dynamic_cleanup_chain (); | |
38a448ca | 7949 | emit_move_insn (dcc, validize_mem (gen_rtx_MEM (Pmode, dcc))); |
e976b8b2 MS |
7950 | return const0_rtx; |
7951 | } | |
7952 | ||
7953 | case POPDHC_EXPR: | |
7954 | { | |
7955 | rtx dhc = get_dynamic_handler_chain (); | |
38a448ca | 7956 | emit_move_insn (dhc, validize_mem (gen_rtx_MEM (Pmode, dhc))); |
e976b8b2 MS |
7957 | return const0_rtx; |
7958 | } | |
7959 | ||
bbf6f052 | 7960 | case ERROR_MARK: |
66538193 RS |
7961 | op0 = CONST0_RTX (tmode); |
7962 | if (op0 != 0) | |
7963 | return op0; | |
bbf6f052 RK |
7964 | return const0_rtx; |
7965 | ||
7966 | default: | |
90764a87 | 7967 | return (*lang_expand_expr) (exp, original_target, tmode, modifier); |
bbf6f052 RK |
7968 | } |
7969 | ||
7970 | /* Here to do an ordinary binary operator, generating an instruction | |
7971 | from the optab already placed in `this_optab'. */ | |
7972 | binop: | |
7973 | preexpand_calls (exp); | |
e5e809f4 | 7974 | if (! safe_from_p (subtarget, TREE_OPERAND (exp, 1), 1)) |
bbf6f052 RK |
7975 | subtarget = 0; |
7976 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
906c4e36 | 7977 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
7978 | binop2: |
7979 | temp = expand_binop (mode, this_optab, op0, op1, target, | |
7980 | unsignedp, OPTAB_LIB_WIDEN); | |
7981 | if (temp == 0) | |
7982 | abort (); | |
7983 | return temp; | |
7984 | } | |
bbf6f052 | 7985 | |
bbf6f052 | 7986 | |
b93a436e JL |
7987 | \f |
7988 | /* Return the alignment in bits of EXP, a pointer valued expression. | |
7989 | But don't return more than MAX_ALIGN no matter what. | |
7990 | The alignment returned is, by default, the alignment of the thing that | |
7991 | EXP points to (if it is not a POINTER_TYPE, 0 is returned). | |
7992 | ||
7993 | Otherwise, look at the expression to see if we can do better, i.e., if the | |
7994 | expression is actually pointing at an object whose alignment is tighter. */ | |
0f41302f | 7995 | |
b93a436e JL |
7996 | static int |
7997 | get_pointer_alignment (exp, max_align) | |
7998 | tree exp; | |
7999 | unsigned max_align; | |
bbf6f052 | 8000 | { |
b93a436e JL |
8001 | unsigned align, inner; |
8002 | ||
8003 | if (TREE_CODE (TREE_TYPE (exp)) != POINTER_TYPE) | |
8004 | return 0; | |
8005 | ||
8006 | align = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp))); | |
8007 | align = MIN (align, max_align); | |
8008 | ||
8009 | while (1) | |
bbf6f052 | 8010 | { |
b93a436e | 8011 | switch (TREE_CODE (exp)) |
bbf6f052 | 8012 | { |
b93a436e JL |
8013 | case NOP_EXPR: |
8014 | case CONVERT_EXPR: | |
8015 | case NON_LVALUE_EXPR: | |
8016 | exp = TREE_OPERAND (exp, 0); | |
8017 | if (TREE_CODE (TREE_TYPE (exp)) != POINTER_TYPE) | |
8018 | return align; | |
8019 | inner = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp))); | |
8020 | align = MIN (inner, max_align); | |
8021 | break; | |
8022 | ||
8023 | case PLUS_EXPR: | |
8024 | /* If sum of pointer + int, restrict our maximum alignment to that | |
8025 | imposed by the integer. If not, we can't do any better than | |
8026 | ALIGN. */ | |
8027 | if (TREE_CODE (TREE_OPERAND (exp, 1)) != INTEGER_CST) | |
8028 | return align; | |
8029 | ||
8030 | while (((TREE_INT_CST_LOW (TREE_OPERAND (exp, 1)) * BITS_PER_UNIT) | |
8031 | & (max_align - 1)) | |
8032 | != 0) | |
8033 | max_align >>= 1; | |
8034 | ||
8035 | exp = TREE_OPERAND (exp, 0); | |
8036 | break; | |
8037 | ||
8038 | case ADDR_EXPR: | |
8039 | /* See what we are pointing at and look at its alignment. */ | |
8040 | exp = TREE_OPERAND (exp, 0); | |
8041 | if (TREE_CODE (exp) == FUNCTION_DECL) | |
8042 | align = FUNCTION_BOUNDARY; | |
8043 | else if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'd') | |
8044 | align = DECL_ALIGN (exp); | |
8045 | #ifdef CONSTANT_ALIGNMENT | |
8046 | else if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'c') | |
8047 | align = CONSTANT_ALIGNMENT (exp, align); | |
c02bd5d9 | 8048 | #endif |
b93a436e | 8049 | return MIN (align, max_align); |
c02bd5d9 | 8050 | |
b93a436e JL |
8051 | default: |
8052 | return align; | |
8053 | } | |
8054 | } | |
8055 | } | |
8056 | \f | |
8057 | /* Return the tree node and offset if a given argument corresponds to | |
8058 | a string constant. */ | |
8059 | ||
8060 | static tree | |
8061 | string_constant (arg, ptr_offset) | |
8062 | tree arg; | |
8063 | tree *ptr_offset; | |
8064 | { | |
8065 | STRIP_NOPS (arg); | |
8066 | ||
8067 | if (TREE_CODE (arg) == ADDR_EXPR | |
8068 | && TREE_CODE (TREE_OPERAND (arg, 0)) == STRING_CST) | |
8069 | { | |
8070 | *ptr_offset = integer_zero_node; | |
8071 | return TREE_OPERAND (arg, 0); | |
8072 | } | |
8073 | else if (TREE_CODE (arg) == PLUS_EXPR) | |
8074 | { | |
8075 | tree arg0 = TREE_OPERAND (arg, 0); | |
8076 | tree arg1 = TREE_OPERAND (arg, 1); | |
8077 | ||
8078 | STRIP_NOPS (arg0); | |
8079 | STRIP_NOPS (arg1); | |
8080 | ||
8081 | if (TREE_CODE (arg0) == ADDR_EXPR | |
8082 | && TREE_CODE (TREE_OPERAND (arg0, 0)) == STRING_CST) | |
bbf6f052 | 8083 | { |
b93a436e JL |
8084 | *ptr_offset = arg1; |
8085 | return TREE_OPERAND (arg0, 0); | |
bbf6f052 | 8086 | } |
b93a436e JL |
8087 | else if (TREE_CODE (arg1) == ADDR_EXPR |
8088 | && TREE_CODE (TREE_OPERAND (arg1, 0)) == STRING_CST) | |
bbf6f052 | 8089 | { |
b93a436e JL |
8090 | *ptr_offset = arg0; |
8091 | return TREE_OPERAND (arg1, 0); | |
bbf6f052 | 8092 | } |
b93a436e | 8093 | } |
ca695ac9 | 8094 | |
b93a436e JL |
8095 | return 0; |
8096 | } | |
ca695ac9 | 8097 | |
b93a436e JL |
8098 | /* Compute the length of a C string. TREE_STRING_LENGTH is not the right |
8099 | way, because it could contain a zero byte in the middle. | |
8100 | TREE_STRING_LENGTH is the size of the character array, not the string. | |
ca695ac9 | 8101 | |
b93a436e JL |
8102 | Unfortunately, string_constant can't access the values of const char |
8103 | arrays with initializers, so neither can we do so here. */ | |
e87b4f3f | 8104 | |
b93a436e JL |
8105 | static tree |
8106 | c_strlen (src) | |
8107 | tree src; | |
8108 | { | |
8109 | tree offset_node; | |
8110 | int offset, max; | |
8111 | char *ptr; | |
e7c33f54 | 8112 | |
b93a436e JL |
8113 | src = string_constant (src, &offset_node); |
8114 | if (src == 0) | |
8115 | return 0; | |
8116 | max = TREE_STRING_LENGTH (src); | |
8117 | ptr = TREE_STRING_POINTER (src); | |
8118 | if (offset_node && TREE_CODE (offset_node) != INTEGER_CST) | |
8119 | { | |
8120 | /* If the string has an internal zero byte (e.g., "foo\0bar"), we can't | |
8121 | compute the offset to the following null if we don't know where to | |
8122 | start searching for it. */ | |
8123 | int i; | |
8124 | for (i = 0; i < max; i++) | |
8125 | if (ptr[i] == 0) | |
8126 | return 0; | |
8127 | /* We don't know the starting offset, but we do know that the string | |
8128 | has no internal zero bytes. We can assume that the offset falls | |
8129 | within the bounds of the string; otherwise, the programmer deserves | |
8130 | what he gets. Subtract the offset from the length of the string, | |
8131 | and return that. */ | |
8132 | /* This would perhaps not be valid if we were dealing with named | |
8133 | arrays in addition to literal string constants. */ | |
8134 | return size_binop (MINUS_EXPR, size_int (max), offset_node); | |
8135 | } | |
e7c33f54 | 8136 | |
b93a436e JL |
8137 | /* We have a known offset into the string. Start searching there for |
8138 | a null character. */ | |
8139 | if (offset_node == 0) | |
8140 | offset = 0; | |
8141 | else | |
8142 | { | |
8143 | /* Did we get a long long offset? If so, punt. */ | |
8144 | if (TREE_INT_CST_HIGH (offset_node) != 0) | |
8145 | return 0; | |
8146 | offset = TREE_INT_CST_LOW (offset_node); | |
8147 | } | |
8148 | /* If the offset is known to be out of bounds, warn, and call strlen at | |
8149 | runtime. */ | |
8150 | if (offset < 0 || offset > max) | |
8151 | { | |
8152 | warning ("offset outside bounds of constant string"); | |
8153 | return 0; | |
8154 | } | |
8155 | /* Use strlen to search for the first zero byte. Since any strings | |
8156 | constructed with build_string will have nulls appended, we win even | |
8157 | if we get handed something like (char[4])"abcd". | |
e7c33f54 | 8158 | |
b93a436e JL |
8159 | Since OFFSET is our starting index into the string, no further |
8160 | calculation is needed. */ | |
8161 | return size_int (strlen (ptr + offset)); | |
8162 | } | |
1bbddf11 | 8163 | |
b93a436e JL |
8164 | rtx |
8165 | expand_builtin_return_addr (fndecl_code, count, tem) | |
8166 | enum built_in_function fndecl_code; | |
8167 | int count; | |
8168 | rtx tem; | |
8169 | { | |
8170 | int i; | |
e7c33f54 | 8171 | |
b93a436e JL |
8172 | /* Some machines need special handling before we can access |
8173 | arbitrary frames. For example, on the sparc, we must first flush | |
8174 | all register windows to the stack. */ | |
8175 | #ifdef SETUP_FRAME_ADDRESSES | |
8176 | if (count > 0) | |
8177 | SETUP_FRAME_ADDRESSES (); | |
8178 | #endif | |
e87b4f3f | 8179 | |
b93a436e JL |
8180 | /* On the sparc, the return address is not in the frame, it is in a |
8181 | register. There is no way to access it off of the current frame | |
8182 | pointer, but it can be accessed off the previous frame pointer by | |
8183 | reading the value from the register window save area. */ | |
8184 | #ifdef RETURN_ADDR_IN_PREVIOUS_FRAME | |
8185 | if (fndecl_code == BUILT_IN_RETURN_ADDRESS) | |
8186 | count--; | |
8187 | #endif | |
60bac6ea | 8188 | |
b93a436e JL |
8189 | /* Scan back COUNT frames to the specified frame. */ |
8190 | for (i = 0; i < count; i++) | |
8191 | { | |
8192 | /* Assume the dynamic chain pointer is in the word that the | |
8193 | frame address points to, unless otherwise specified. */ | |
8194 | #ifdef DYNAMIC_CHAIN_ADDRESS | |
8195 | tem = DYNAMIC_CHAIN_ADDRESS (tem); | |
8196 | #endif | |
8197 | tem = memory_address (Pmode, tem); | |
8198 | tem = copy_to_reg (gen_rtx_MEM (Pmode, tem)); | |
8199 | } | |
ca695ac9 | 8200 | |
b93a436e JL |
8201 | /* For __builtin_frame_address, return what we've got. */ |
8202 | if (fndecl_code == BUILT_IN_FRAME_ADDRESS) | |
8203 | return tem; | |
e9a25f70 | 8204 | |
b93a436e JL |
8205 | /* For __builtin_return_address, Get the return address from that |
8206 | frame. */ | |
8207 | #ifdef RETURN_ADDR_RTX | |
8208 | tem = RETURN_ADDR_RTX (count, tem); | |
8209 | #else | |
8210 | tem = memory_address (Pmode, | |
8211 | plus_constant (tem, GET_MODE_SIZE (Pmode))); | |
8212 | tem = gen_rtx_MEM (Pmode, tem); | |
8213 | #endif | |
8214 | return tem; | |
8215 | } | |
e9a25f70 | 8216 | |
b93a436e JL |
8217 | /* __builtin_setjmp is passed a pointer to an array of five words (not |
8218 | all will be used on all machines). It operates similarly to the C | |
8219 | library function of the same name, but is more efficient. Much of | |
8220 | the code below (and for longjmp) is copied from the handling of | |
8221 | non-local gotos. | |
ca695ac9 | 8222 | |
b93a436e JL |
8223 | NOTE: This is intended for use by GNAT and the exception handling |
8224 | scheme in the compiler and will only work in the method used by | |
8225 | them. */ | |
e9a25f70 | 8226 | |
b93a436e | 8227 | rtx |
6fd1c67b | 8228 | expand_builtin_setjmp (buf_addr, target, first_label, next_label) |
b93a436e JL |
8229 | rtx buf_addr; |
8230 | rtx target; | |
6fd1c67b | 8231 | rtx first_label, next_label; |
b93a436e | 8232 | { |
6fd1c67b | 8233 | rtx lab1 = gen_label_rtx (); |
a260abc9 DE |
8234 | enum machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL); |
8235 | enum machine_mode value_mode; | |
b93a436e | 8236 | rtx stack_save; |
e9a25f70 | 8237 | |
b93a436e | 8238 | value_mode = TYPE_MODE (integer_type_node); |
ca695ac9 | 8239 | |
b93a436e JL |
8240 | #ifdef POINTERS_EXTEND_UNSIGNED |
8241 | buf_addr = convert_memory_address (Pmode, buf_addr); | |
8242 | #endif | |
d7f21d63 | 8243 | |
b93a436e | 8244 | buf_addr = force_reg (Pmode, buf_addr); |
d7f21d63 | 8245 | |
b93a436e JL |
8246 | if (target == 0 || GET_CODE (target) != REG |
8247 | || REGNO (target) < FIRST_PSEUDO_REGISTER) | |
8248 | target = gen_reg_rtx (value_mode); | |
d7f21d63 | 8249 | |
b93a436e | 8250 | emit_queue (); |
d7f21d63 | 8251 | |
9ec36da5 JL |
8252 | /* We store the frame pointer and the address of lab1 in the buffer |
8253 | and use the rest of it for the stack save area, which is | |
8254 | machine-dependent. */ | |
8255 | ||
0bc02db4 MS |
8256 | #ifndef BUILTIN_SETJMP_FRAME_VALUE |
8257 | #define BUILTIN_SETJMP_FRAME_VALUE virtual_stack_vars_rtx | |
8258 | #endif | |
8259 | ||
b93a436e | 8260 | emit_move_insn (gen_rtx_MEM (Pmode, buf_addr), |
0bc02db4 | 8261 | BUILTIN_SETJMP_FRAME_VALUE); |
6fd1c67b RH |
8262 | emit_move_insn (validize_mem |
8263 | (gen_rtx_MEM (Pmode, | |
b93a436e JL |
8264 | plus_constant (buf_addr, |
8265 | GET_MODE_SIZE (Pmode)))), | |
6fd1c67b | 8266 | gen_rtx_LABEL_REF (Pmode, lab1)); |
d7f21d63 | 8267 | |
b93a436e JL |
8268 | stack_save = gen_rtx_MEM (sa_mode, |
8269 | plus_constant (buf_addr, | |
8270 | 2 * GET_MODE_SIZE (Pmode))); | |
8271 | emit_stack_save (SAVE_NONLOCAL, &stack_save, NULL_RTX); | |
e9a25f70 | 8272 | |
6fd1c67b RH |
8273 | /* If there is further processing to do, do it. */ |
8274 | #ifdef HAVE_builtin_setjmp_setup | |
8275 | if (HAVE_builtin_setjmp_setup) | |
8276 | emit_insn (gen_builtin_setjmp_setup (buf_addr)); | |
b93a436e | 8277 | #endif |
d7f21d63 | 8278 | |
6fd1c67b | 8279 | /* Set TARGET to zero and branch to the first-time-through label. */ |
b93a436e | 8280 | emit_move_insn (target, const0_rtx); |
6fd1c67b | 8281 | emit_jump_insn (gen_jump (first_label)); |
b93a436e JL |
8282 | emit_barrier (); |
8283 | emit_label (lab1); | |
d7f21d63 | 8284 | |
6fd1c67b RH |
8285 | /* Tell flow about the strange goings on. */ |
8286 | current_function_has_nonlocal_label = 1; | |
8287 | ||
8288 | /* Clobber the FP when we get here, so we have to make sure it's | |
8289 | marked as used by this function. */ | |
b93a436e | 8290 | emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx)); |
e9a25f70 | 8291 | |
b93a436e JL |
8292 | /* Mark the static chain as clobbered here so life information |
8293 | doesn't get messed up for it. */ | |
8294 | emit_insn (gen_rtx_CLOBBER (VOIDmode, static_chain_rtx)); | |
d7f21d63 | 8295 | |
b93a436e JL |
8296 | /* Now put in the code to restore the frame pointer, and argument |
8297 | pointer, if needed. The code below is from expand_end_bindings | |
8298 | in stmt.c; see detailed documentation there. */ | |
8299 | #ifdef HAVE_nonlocal_goto | |
8300 | if (! HAVE_nonlocal_goto) | |
8301 | #endif | |
8302 | emit_move_insn (virtual_stack_vars_rtx, hard_frame_pointer_rtx); | |
ca695ac9 | 8303 | |
b93a436e JL |
8304 | #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM |
8305 | if (fixed_regs[ARG_POINTER_REGNUM]) | |
8306 | { | |
8307 | #ifdef ELIMINABLE_REGS | |
081f5e7e | 8308 | int i; |
b93a436e | 8309 | static struct elims {int from, to;} elim_regs[] = ELIMINABLE_REGS; |
ca695ac9 | 8310 | |
b93a436e JL |
8311 | for (i = 0; i < sizeof elim_regs / sizeof elim_regs[0]; i++) |
8312 | if (elim_regs[i].from == ARG_POINTER_REGNUM | |
8313 | && elim_regs[i].to == HARD_FRAME_POINTER_REGNUM) | |
8314 | break; | |
ca695ac9 | 8315 | |
b93a436e JL |
8316 | if (i == sizeof elim_regs / sizeof elim_regs [0]) |
8317 | #endif | |
8318 | { | |
8319 | /* Now restore our arg pointer from the address at which it | |
8320 | was saved in our stack frame. | |
8321 | If there hasn't be space allocated for it yet, make | |
8322 | some now. */ | |
8323 | if (arg_pointer_save_area == 0) | |
8324 | arg_pointer_save_area | |
8325 | = assign_stack_local (Pmode, GET_MODE_SIZE (Pmode), 0); | |
8326 | emit_move_insn (virtual_incoming_args_rtx, | |
8327 | copy_to_reg (arg_pointer_save_area)); | |
8328 | } | |
8329 | } | |
8330 | #endif | |
ca695ac9 | 8331 | |
6fd1c67b RH |
8332 | #ifdef HAVE_builtin_setjmp_receiver |
8333 | if (HAVE_builtin_setjmp_receiver) | |
8334 | emit_insn (gen_builtin_setjmp_receiver (lab1)); | |
8335 | else | |
8336 | #endif | |
b93a436e | 8337 | #ifdef HAVE_nonlocal_goto_receiver |
6fd1c67b RH |
8338 | if (HAVE_nonlocal_goto_receiver) |
8339 | emit_insn (gen_nonlocal_goto_receiver ()); | |
8340 | else | |
b93a436e | 8341 | #endif |
081f5e7e KG |
8342 | { |
8343 | ; /* Nothing */ | |
8344 | } | |
6fd1c67b RH |
8345 | |
8346 | /* Set TARGET, and branch to the next-time-through label. */ | |
3e2b9a3d | 8347 | emit_move_insn (target, const1_rtx); |
6fd1c67b RH |
8348 | emit_jump_insn (gen_jump (next_label)); |
8349 | emit_barrier (); | |
ca695ac9 | 8350 | |
6fd1c67b RH |
8351 | return target; |
8352 | } | |
ca695ac9 | 8353 | |
6fd1c67b RH |
8354 | void |
8355 | expand_builtin_longjmp (buf_addr, value) | |
8356 | rtx buf_addr, value; | |
8357 | { | |
8358 | rtx fp, lab, stack; | |
a260abc9 | 8359 | enum machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL); |
ca695ac9 | 8360 | |
6fd1c67b RH |
8361 | #ifdef POINTERS_EXTEND_UNSIGNED |
8362 | buf_addr = convert_memory_address (Pmode, buf_addr); | |
b93a436e | 8363 | #endif |
6fd1c67b RH |
8364 | buf_addr = force_reg (Pmode, buf_addr); |
8365 | ||
3e2b9a3d JW |
8366 | /* We used to store value in static_chain_rtx, but that fails if pointers |
8367 | are smaller than integers. We instead require that the user must pass | |
8368 | a second argument of 1, because that is what builtin_setjmp will | |
8369 | return. This also makes EH slightly more efficient, since we are no | |
8370 | longer copying around a value that we don't care about. */ | |
8371 | if (value != const1_rtx) | |
8372 | abort (); | |
6fd1c67b RH |
8373 | |
8374 | #ifdef HAVE_builtin_longjmp | |
8375 | if (HAVE_builtin_longjmp) | |
3e2b9a3d | 8376 | emit_insn (gen_builtin_longjmp (buf_addr)); |
6fd1c67b | 8377 | else |
b93a436e | 8378 | #endif |
6fd1c67b RH |
8379 | { |
8380 | fp = gen_rtx_MEM (Pmode, buf_addr); | |
8381 | lab = gen_rtx_MEM (Pmode, plus_constant (buf_addr, | |
8382 | GET_MODE_SIZE (Pmode))); | |
e9a25f70 | 8383 | |
6fd1c67b RH |
8384 | stack = gen_rtx_MEM (sa_mode, plus_constant (buf_addr, |
8385 | 2 * GET_MODE_SIZE (Pmode))); | |
8386 | ||
8387 | /* Pick up FP, label, and SP from the block and jump. This code is | |
8388 | from expand_goto in stmt.c; see there for detailed comments. */ | |
8389 | #if HAVE_nonlocal_goto | |
8390 | if (HAVE_nonlocal_goto) | |
3e2b9a3d JW |
8391 | /* We have to pass a value to the nonlocal_goto pattern that will |
8392 | get copied into the static_chain pointer, but it does not matter | |
8393 | what that value is, because builtin_setjmp does not use it. */ | |
6fd1c67b RH |
8394 | emit_insn (gen_nonlocal_goto (value, fp, stack, lab)); |
8395 | else | |
b93a436e | 8396 | #endif |
6fd1c67b RH |
8397 | { |
8398 | lab = copy_to_reg (lab); | |
60bac6ea | 8399 | |
6fd1c67b RH |
8400 | emit_move_insn (hard_frame_pointer_rtx, fp); |
8401 | emit_stack_restore (SAVE_NONLOCAL, stack, NULL_RTX); | |
8402 | ||
8403 | emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx)); | |
8404 | emit_insn (gen_rtx_USE (VOIDmode, stack_pointer_rtx)); | |
6fd1c67b RH |
8405 | emit_indirect_jump (lab); |
8406 | } | |
8407 | } | |
b93a436e | 8408 | } |
60bac6ea | 8409 | |
55a6ba9f JC |
8410 | static rtx |
8411 | get_memory_rtx (exp) | |
8412 | tree exp; | |
8413 | { | |
8414 | rtx mem; | |
8415 | int is_aggregate; | |
8416 | ||
8417 | mem = gen_rtx_MEM (BLKmode, | |
8418 | memory_address (BLKmode, | |
8419 | expand_expr (exp, NULL_RTX, | |
8420 | ptr_mode, EXPAND_SUM))); | |
8421 | ||
8422 | RTX_UNCHANGING_P (mem) = TREE_READONLY (exp); | |
8423 | ||
8424 | /* Figure out the type of the object pointed to. Set MEM_IN_STRUCT_P | |
8425 | if the value is the address of a structure or if the expression is | |
8426 | cast to a pointer to structure type. */ | |
8427 | is_aggregate = 0; | |
8428 | ||
8429 | while (TREE_CODE (exp) == NOP_EXPR) | |
8430 | { | |
8431 | tree cast_type = TREE_TYPE (exp); | |
8432 | if (TREE_CODE (cast_type) == POINTER_TYPE | |
8433 | && AGGREGATE_TYPE_P (TREE_TYPE (cast_type))) | |
8434 | { | |
8435 | is_aggregate = 1; | |
8436 | break; | |
8437 | } | |
8438 | exp = TREE_OPERAND (exp, 0); | |
8439 | } | |
8440 | ||
8441 | if (is_aggregate == 0) | |
8442 | { | |
8443 | tree type; | |
8444 | ||
8445 | if (TREE_CODE (exp) == ADDR_EXPR) | |
8446 | /* If this is the address of an object, check whether the | |
8447 | object is an array. */ | |
8448 | type = TREE_TYPE (TREE_OPERAND (exp, 0)); | |
8449 | else | |
8450 | type = TREE_TYPE (TREE_TYPE (exp)); | |
8451 | is_aggregate = AGGREGATE_TYPE_P (type); | |
8452 | } | |
8453 | ||
8454 | MEM_IN_STRUCT_P (mem) = is_aggregate; | |
8455 | return mem; | |
8456 | } | |
8457 | ||
b93a436e JL |
8458 | \f |
8459 | /* Expand an expression EXP that calls a built-in function, | |
8460 | with result going to TARGET if that's convenient | |
8461 | (and in mode MODE if that's convenient). | |
8462 | SUBTARGET may be used as the target for computing one of EXP's operands. | |
8463 | IGNORE is nonzero if the value is to be ignored. */ | |
60bac6ea | 8464 | |
b93a436e JL |
8465 | #define CALLED_AS_BUILT_IN(NODE) \ |
8466 | (!strncmp (IDENTIFIER_POINTER (DECL_NAME (NODE)), "__builtin_", 10)) | |
60bac6ea | 8467 | |
b93a436e JL |
8468 | static rtx |
8469 | expand_builtin (exp, target, subtarget, mode, ignore) | |
8470 | tree exp; | |
8471 | rtx target; | |
8472 | rtx subtarget; | |
8473 | enum machine_mode mode; | |
8474 | int ignore; | |
8475 | { | |
8476 | tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0); | |
8477 | tree arglist = TREE_OPERAND (exp, 1); | |
8478 | rtx op0; | |
8479 | rtx lab1, insns; | |
8480 | enum machine_mode value_mode = TYPE_MODE (TREE_TYPE (exp)); | |
8481 | optab builtin_optab; | |
60bac6ea | 8482 | |
b93a436e JL |
8483 | switch (DECL_FUNCTION_CODE (fndecl)) |
8484 | { | |
8485 | case BUILT_IN_ABS: | |
8486 | case BUILT_IN_LABS: | |
8487 | case BUILT_IN_FABS: | |
8488 | /* build_function_call changes these into ABS_EXPR. */ | |
8489 | abort (); | |
4ed67205 | 8490 | |
b93a436e JL |
8491 | case BUILT_IN_SIN: |
8492 | case BUILT_IN_COS: | |
8493 | /* Treat these like sqrt, but only if the user asks for them. */ | |
8494 | if (! flag_fast_math) | |
8495 | break; | |
8496 | case BUILT_IN_FSQRT: | |
8497 | /* If not optimizing, call the library function. */ | |
8498 | if (! optimize) | |
8499 | break; | |
4ed67205 | 8500 | |
b93a436e JL |
8501 | if (arglist == 0 |
8502 | /* Arg could be wrong type if user redeclared this fcn wrong. */ | |
8503 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != REAL_TYPE) | |
4ed67205 RK |
8504 | break; |
8505 | ||
b93a436e JL |
8506 | /* Stabilize and compute the argument. */ |
8507 | if (TREE_CODE (TREE_VALUE (arglist)) != VAR_DECL | |
8508 | && TREE_CODE (TREE_VALUE (arglist)) != PARM_DECL) | |
8509 | { | |
8510 | exp = copy_node (exp); | |
8511 | arglist = copy_node (arglist); | |
8512 | TREE_OPERAND (exp, 1) = arglist; | |
8513 | TREE_VALUE (arglist) = save_expr (TREE_VALUE (arglist)); | |
8514 | } | |
8515 | op0 = expand_expr (TREE_VALUE (arglist), subtarget, VOIDmode, 0); | |
b089937a | 8516 | |
b93a436e JL |
8517 | /* Make a suitable register to place result in. */ |
8518 | target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp))); | |
7565a035 | 8519 | |
b93a436e JL |
8520 | emit_queue (); |
8521 | start_sequence (); | |
7565a035 | 8522 | |
b93a436e JL |
8523 | switch (DECL_FUNCTION_CODE (fndecl)) |
8524 | { | |
8525 | case BUILT_IN_SIN: | |
8526 | builtin_optab = sin_optab; break; | |
8527 | case BUILT_IN_COS: | |
8528 | builtin_optab = cos_optab; break; | |
8529 | case BUILT_IN_FSQRT: | |
8530 | builtin_optab = sqrt_optab; break; | |
8531 | default: | |
8532 | abort (); | |
8533 | } | |
4ed67205 | 8534 | |
b93a436e JL |
8535 | /* Compute into TARGET. |
8536 | Set TARGET to wherever the result comes back. */ | |
8537 | target = expand_unop (TYPE_MODE (TREE_TYPE (TREE_VALUE (arglist))), | |
8538 | builtin_optab, op0, target, 0); | |
8539 | ||
8540 | /* If we were unable to expand via the builtin, stop the | |
8541 | sequence (without outputting the insns) and break, causing | |
38e01259 | 8542 | a call to the library function. */ |
b93a436e | 8543 | if (target == 0) |
4ed67205 | 8544 | { |
b93a436e JL |
8545 | end_sequence (); |
8546 | break; | |
8547 | } | |
4ed67205 | 8548 | |
b93a436e JL |
8549 | /* Check the results by default. But if flag_fast_math is turned on, |
8550 | then assume sqrt will always be called with valid arguments. */ | |
4ed67205 | 8551 | |
b93a436e JL |
8552 | if (! flag_fast_math) |
8553 | { | |
8554 | /* Don't define the builtin FP instructions | |
8555 | if your machine is not IEEE. */ | |
8556 | if (TARGET_FLOAT_FORMAT != IEEE_FLOAT_FORMAT) | |
8557 | abort (); | |
4ed67205 | 8558 | |
b93a436e | 8559 | lab1 = gen_label_rtx (); |
ca55abae | 8560 | |
b93a436e JL |
8561 | /* Test the result; if it is NaN, set errno=EDOM because |
8562 | the argument was not in the domain. */ | |
8563 | emit_cmp_insn (target, target, EQ, 0, GET_MODE (target), 0, 0); | |
8564 | emit_jump_insn (gen_beq (lab1)); | |
8565 | ||
8566 | #ifdef TARGET_EDOM | |
8567 | { | |
8568 | #ifdef GEN_ERRNO_RTX | |
8569 | rtx errno_rtx = GEN_ERRNO_RTX; | |
8570 | #else | |
8571 | rtx errno_rtx | |
8572 | = gen_rtx_MEM (word_mode, gen_rtx_SYMBOL_REF (Pmode, "errno")); | |
8573 | #endif | |
e87b4f3f | 8574 | |
b93a436e JL |
8575 | emit_move_insn (errno_rtx, GEN_INT (TARGET_EDOM)); |
8576 | } | |
8577 | #else | |
8578 | /* We can't set errno=EDOM directly; let the library call do it. | |
8579 | Pop the arguments right away in case the call gets deleted. */ | |
8580 | NO_DEFER_POP; | |
8581 | expand_call (exp, target, 0); | |
8582 | OK_DEFER_POP; | |
8583 | #endif | |
e7c33f54 | 8584 | |
b93a436e JL |
8585 | emit_label (lab1); |
8586 | } | |
0006469d | 8587 | |
b93a436e JL |
8588 | /* Output the entire sequence. */ |
8589 | insns = get_insns (); | |
8590 | end_sequence (); | |
8591 | emit_insns (insns); | |
8592 | ||
8593 | return target; | |
0006469d | 8594 | |
b93a436e JL |
8595 | case BUILT_IN_FMOD: |
8596 | break; | |
0006469d | 8597 | |
b93a436e JL |
8598 | /* __builtin_apply_args returns block of memory allocated on |
8599 | the stack into which is stored the arg pointer, structure | |
8600 | value address, static chain, and all the registers that might | |
8601 | possibly be used in performing a function call. The code is | |
8602 | moved to the start of the function so the incoming values are | |
8603 | saved. */ | |
8604 | case BUILT_IN_APPLY_ARGS: | |
8605 | /* Don't do __builtin_apply_args more than once in a function. | |
8606 | Save the result of the first call and reuse it. */ | |
8607 | if (apply_args_value != 0) | |
8608 | return apply_args_value; | |
8609 | { | |
8610 | /* When this function is called, it means that registers must be | |
8611 | saved on entry to this function. So we migrate the | |
8612 | call to the first insn of this function. */ | |
8613 | rtx temp; | |
8614 | rtx seq; | |
0006469d | 8615 | |
b93a436e JL |
8616 | start_sequence (); |
8617 | temp = expand_builtin_apply_args (); | |
8618 | seq = get_insns (); | |
8619 | end_sequence (); | |
0006469d | 8620 | |
b93a436e | 8621 | apply_args_value = temp; |
0006469d | 8622 | |
b93a436e JL |
8623 | /* Put the sequence after the NOTE that starts the function. |
8624 | If this is inside a SEQUENCE, make the outer-level insn | |
8625 | chain current, so the code is placed at the start of the | |
8626 | function. */ | |
8627 | push_topmost_sequence (); | |
8628 | emit_insns_before (seq, NEXT_INSN (get_insns ())); | |
8629 | pop_topmost_sequence (); | |
8630 | return temp; | |
8631 | } | |
0006469d | 8632 | |
b93a436e JL |
8633 | /* __builtin_apply (FUNCTION, ARGUMENTS, ARGSIZE) invokes |
8634 | FUNCTION with a copy of the parameters described by | |
8635 | ARGUMENTS, and ARGSIZE. It returns a block of memory | |
8636 | allocated on the stack into which is stored all the registers | |
8637 | that might possibly be used for returning the result of a | |
8638 | function. ARGUMENTS is the value returned by | |
8639 | __builtin_apply_args. ARGSIZE is the number of bytes of | |
8640 | arguments that must be copied. ??? How should this value be | |
8641 | computed? We'll also need a safe worst case value for varargs | |
8642 | functions. */ | |
8643 | case BUILT_IN_APPLY: | |
8644 | if (arglist == 0 | |
8645 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
e5e809f4 | 8646 | || ! POINTER_TYPE_P (TREE_TYPE (TREE_VALUE (arglist))) |
b93a436e JL |
8647 | || TREE_CHAIN (arglist) == 0 |
8648 | || TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (arglist)))) != POINTER_TYPE | |
8649 | || TREE_CHAIN (TREE_CHAIN (arglist)) == 0 | |
8650 | || TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))))) != INTEGER_TYPE) | |
8651 | return const0_rtx; | |
8652 | else | |
8653 | { | |
8654 | int i; | |
8655 | tree t; | |
8656 | rtx ops[3]; | |
0006469d | 8657 | |
b93a436e JL |
8658 | for (t = arglist, i = 0; t; t = TREE_CHAIN (t), i++) |
8659 | ops[i] = expand_expr (TREE_VALUE (t), NULL_RTX, VOIDmode, 0); | |
bbf6f052 | 8660 | |
b93a436e JL |
8661 | return expand_builtin_apply (ops[0], ops[1], ops[2]); |
8662 | } | |
bbf6f052 | 8663 | |
b93a436e JL |
8664 | /* __builtin_return (RESULT) causes the function to return the |
8665 | value described by RESULT. RESULT is address of the block of | |
8666 | memory returned by __builtin_apply. */ | |
8667 | case BUILT_IN_RETURN: | |
8668 | if (arglist | |
8669 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
8670 | && TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) == POINTER_TYPE) | |
8671 | expand_builtin_return (expand_expr (TREE_VALUE (arglist), | |
8672 | NULL_RTX, VOIDmode, 0)); | |
8673 | return const0_rtx; | |
ca695ac9 | 8674 | |
b93a436e JL |
8675 | case BUILT_IN_SAVEREGS: |
8676 | /* Don't do __builtin_saveregs more than once in a function. | |
8677 | Save the result of the first call and reuse it. */ | |
8678 | if (saveregs_value != 0) | |
8679 | return saveregs_value; | |
8680 | { | |
8681 | /* When this function is called, it means that registers must be | |
8682 | saved on entry to this function. So we migrate the | |
8683 | call to the first insn of this function. */ | |
8684 | rtx temp; | |
8685 | rtx seq; | |
ca695ac9 | 8686 | |
b93a436e JL |
8687 | /* Now really call the function. `expand_call' does not call |
8688 | expand_builtin, so there is no danger of infinite recursion here. */ | |
8689 | start_sequence (); | |
ca695ac9 | 8690 | |
b93a436e JL |
8691 | #ifdef EXPAND_BUILTIN_SAVEREGS |
8692 | /* Do whatever the machine needs done in this case. */ | |
8693 | temp = EXPAND_BUILTIN_SAVEREGS (arglist); | |
8694 | #else | |
8695 | /* The register where the function returns its value | |
8696 | is likely to have something else in it, such as an argument. | |
8697 | So preserve that register around the call. */ | |
ca695ac9 | 8698 | |
b93a436e JL |
8699 | if (value_mode != VOIDmode) |
8700 | { | |
8701 | rtx valreg = hard_libcall_value (value_mode); | |
8702 | rtx saved_valreg = gen_reg_rtx (value_mode); | |
ca695ac9 | 8703 | |
b93a436e JL |
8704 | emit_move_insn (saved_valreg, valreg); |
8705 | temp = expand_call (exp, target, ignore); | |
8706 | emit_move_insn (valreg, saved_valreg); | |
ca695ac9 JB |
8707 | } |
8708 | else | |
b93a436e JL |
8709 | /* Generate the call, putting the value in a pseudo. */ |
8710 | temp = expand_call (exp, target, ignore); | |
8711 | #endif | |
bbf6f052 | 8712 | |
b93a436e JL |
8713 | seq = get_insns (); |
8714 | end_sequence (); | |
bbf6f052 | 8715 | |
b93a436e | 8716 | saveregs_value = temp; |
bbf6f052 | 8717 | |
b93a436e JL |
8718 | /* Put the sequence after the NOTE that starts the function. |
8719 | If this is inside a SEQUENCE, make the outer-level insn | |
8720 | chain current, so the code is placed at the start of the | |
8721 | function. */ | |
8722 | push_topmost_sequence (); | |
8723 | emit_insns_before (seq, NEXT_INSN (get_insns ())); | |
8724 | pop_topmost_sequence (); | |
8725 | return temp; | |
8726 | } | |
bbf6f052 | 8727 | |
b93a436e JL |
8728 | /* __builtin_args_info (N) returns word N of the arg space info |
8729 | for the current function. The number and meanings of words | |
8730 | is controlled by the definition of CUMULATIVE_ARGS. */ | |
8731 | case BUILT_IN_ARGS_INFO: | |
8732 | { | |
8733 | int nwords = sizeof (CUMULATIVE_ARGS) / sizeof (int); | |
b93a436e | 8734 | int *word_ptr = (int *) ¤t_function_args_info; |
381127e8 RL |
8735 | #if 0 |
8736 | /* These are used by the code below that is if 0'ed away */ | |
8737 | int i; | |
b93a436e | 8738 | tree type, elts, result; |
381127e8 | 8739 | #endif |
bbf6f052 | 8740 | |
b93a436e JL |
8741 | if (sizeof (CUMULATIVE_ARGS) % sizeof (int) != 0) |
8742 | fatal ("CUMULATIVE_ARGS type defined badly; see %s, line %d", | |
8743 | __FILE__, __LINE__); | |
bbf6f052 | 8744 | |
b93a436e JL |
8745 | if (arglist != 0) |
8746 | { | |
8747 | tree arg = TREE_VALUE (arglist); | |
8748 | if (TREE_CODE (arg) != INTEGER_CST) | |
8749 | error ("argument of `__builtin_args_info' must be constant"); | |
8750 | else | |
8751 | { | |
8752 | int wordnum = TREE_INT_CST_LOW (arg); | |
bbf6f052 | 8753 | |
b93a436e JL |
8754 | if (wordnum < 0 || wordnum >= nwords || TREE_INT_CST_HIGH (arg)) |
8755 | error ("argument of `__builtin_args_info' out of range"); | |
8756 | else | |
8757 | return GEN_INT (word_ptr[wordnum]); | |
8758 | } | |
bbf6f052 RK |
8759 | } |
8760 | else | |
b93a436e | 8761 | error ("missing argument in `__builtin_args_info'"); |
bbf6f052 | 8762 | |
b93a436e | 8763 | return const0_rtx; |
bbf6f052 | 8764 | |
b93a436e JL |
8765 | #if 0 |
8766 | for (i = 0; i < nwords; i++) | |
8767 | elts = tree_cons (NULL_TREE, build_int_2 (word_ptr[i], 0)); | |
bbf6f052 | 8768 | |
b93a436e JL |
8769 | type = build_array_type (integer_type_node, |
8770 | build_index_type (build_int_2 (nwords, 0))); | |
8771 | result = build (CONSTRUCTOR, type, NULL_TREE, nreverse (elts)); | |
8772 | TREE_CONSTANT (result) = 1; | |
8773 | TREE_STATIC (result) = 1; | |
8774 | result = build (INDIRECT_REF, build_pointer_type (type), result); | |
8775 | TREE_CONSTANT (result) = 1; | |
8776 | return expand_expr (result, NULL_RTX, VOIDmode, EXPAND_MEMORY_USE_BAD); | |
8777 | #endif | |
8778 | } | |
8779 | ||
8780 | /* Return the address of the first anonymous stack arg. */ | |
8781 | case BUILT_IN_NEXT_ARG: | |
ca695ac9 | 8782 | { |
b93a436e JL |
8783 | tree fntype = TREE_TYPE (current_function_decl); |
8784 | ||
8785 | if ((TYPE_ARG_TYPES (fntype) == 0 | |
8786 | || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (fntype))) | |
8787 | == void_type_node)) | |
8788 | && ! current_function_varargs) | |
8789 | { | |
8790 | error ("`va_start' used in function with fixed args"); | |
8791 | return const0_rtx; | |
8792 | } | |
8793 | ||
8794 | if (arglist) | |
8795 | { | |
8796 | tree last_parm = tree_last (DECL_ARGUMENTS (current_function_decl)); | |
8797 | tree arg = TREE_VALUE (arglist); | |
8798 | ||
8799 | /* Strip off all nops for the sake of the comparison. This | |
8800 | is not quite the same as STRIP_NOPS. It does more. | |
8801 | We must also strip off INDIRECT_EXPR for C++ reference | |
8802 | parameters. */ | |
8803 | while (TREE_CODE (arg) == NOP_EXPR | |
8804 | || TREE_CODE (arg) == CONVERT_EXPR | |
8805 | || TREE_CODE (arg) == NON_LVALUE_EXPR | |
8806 | || TREE_CODE (arg) == INDIRECT_REF) | |
8807 | arg = TREE_OPERAND (arg, 0); | |
8808 | if (arg != last_parm) | |
8809 | warning ("second parameter of `va_start' not last named argument"); | |
8810 | } | |
8811 | else if (! current_function_varargs) | |
8812 | /* Evidently an out of date version of <stdarg.h>; can't validate | |
8813 | va_start's second argument, but can still work as intended. */ | |
8814 | warning ("`__builtin_next_arg' called without an argument"); | |
bbf6f052 RK |
8815 | } |
8816 | ||
b93a436e JL |
8817 | return expand_binop (Pmode, add_optab, |
8818 | current_function_internal_arg_pointer, | |
8819 | current_function_arg_offset_rtx, | |
8820 | NULL_RTX, 0, OPTAB_LIB_WIDEN); | |
ca695ac9 | 8821 | |
b93a436e JL |
8822 | case BUILT_IN_CLASSIFY_TYPE: |
8823 | if (arglist != 0) | |
8824 | { | |
8825 | tree type = TREE_TYPE (TREE_VALUE (arglist)); | |
8826 | enum tree_code code = TREE_CODE (type); | |
8827 | if (code == VOID_TYPE) | |
8828 | return GEN_INT (void_type_class); | |
8829 | if (code == INTEGER_TYPE) | |
8830 | return GEN_INT (integer_type_class); | |
8831 | if (code == CHAR_TYPE) | |
8832 | return GEN_INT (char_type_class); | |
8833 | if (code == ENUMERAL_TYPE) | |
8834 | return GEN_INT (enumeral_type_class); | |
8835 | if (code == BOOLEAN_TYPE) | |
8836 | return GEN_INT (boolean_type_class); | |
8837 | if (code == POINTER_TYPE) | |
8838 | return GEN_INT (pointer_type_class); | |
8839 | if (code == REFERENCE_TYPE) | |
8840 | return GEN_INT (reference_type_class); | |
8841 | if (code == OFFSET_TYPE) | |
8842 | return GEN_INT (offset_type_class); | |
8843 | if (code == REAL_TYPE) | |
8844 | return GEN_INT (real_type_class); | |
8845 | if (code == COMPLEX_TYPE) | |
8846 | return GEN_INT (complex_type_class); | |
8847 | if (code == FUNCTION_TYPE) | |
8848 | return GEN_INT (function_type_class); | |
8849 | if (code == METHOD_TYPE) | |
8850 | return GEN_INT (method_type_class); | |
8851 | if (code == RECORD_TYPE) | |
8852 | return GEN_INT (record_type_class); | |
8853 | if (code == UNION_TYPE || code == QUAL_UNION_TYPE) | |
8854 | return GEN_INT (union_type_class); | |
8855 | if (code == ARRAY_TYPE) | |
8856 | { | |
8857 | if (TYPE_STRING_FLAG (type)) | |
8858 | return GEN_INT (string_type_class); | |
8859 | else | |
8860 | return GEN_INT (array_type_class); | |
8861 | } | |
8862 | if (code == SET_TYPE) | |
8863 | return GEN_INT (set_type_class); | |
8864 | if (code == FILE_TYPE) | |
8865 | return GEN_INT (file_type_class); | |
8866 | if (code == LANG_TYPE) | |
8867 | return GEN_INT (lang_type_class); | |
8868 | } | |
8869 | return GEN_INT (no_type_class); | |
ca695ac9 | 8870 | |
b93a436e JL |
8871 | case BUILT_IN_CONSTANT_P: |
8872 | if (arglist == 0) | |
8873 | return const0_rtx; | |
8874 | else | |
8875 | { | |
8876 | tree arg = TREE_VALUE (arglist); | |
ca695ac9 | 8877 | |
b93a436e | 8878 | STRIP_NOPS (arg); |
cff48d8f RH |
8879 | if (really_constant_p (arg) |
8880 | || (TREE_CODE (arg) == ADDR_EXPR | |
8881 | && TREE_CODE (TREE_OPERAND (arg, 0)) == STRING_CST)) | |
8882 | return const1_rtx; | |
8883 | ||
8884 | /* Only emit CONSTANT_P_RTX if CSE will be run. | |
8885 | Moreover, we don't want to expand trees that have side effects, | |
8886 | as the original __builtin_constant_p did not evaluate its | |
8887 | argument at all, and we would break existing usage by changing | |
8888 | this. This quirk was generally useful, eliminating a bit of hair | |
8889 | in the writing of the macros that use this function. Now the | |
8890 | same thing can be better accomplished in an inline function. */ | |
8891 | ||
8892 | if (! cse_not_expected && ! TREE_SIDE_EFFECTS (arg)) | |
8893 | { | |
8894 | /* Lazy fixup of old code: issue a warning and fail the test. */ | |
8895 | if (! can_handle_constant_p) | |
8896 | { | |
8897 | warning ("Delayed evaluation of __builtin_constant_p not supported on this target."); | |
8898 | warning ("Please report this as a bug to egcs-bugs@cygnus.com."); | |
8899 | return const0_rtx; | |
8900 | } | |
8901 | return gen_rtx_CONSTANT_P_RTX (TYPE_MODE (integer_type_node), | |
8902 | expand_expr (arg, NULL_RTX, | |
8903 | VOIDmode, 0)); | |
8904 | } | |
8905 | ||
8906 | return const0_rtx; | |
b93a436e | 8907 | } |
ca695ac9 | 8908 | |
b93a436e JL |
8909 | case BUILT_IN_FRAME_ADDRESS: |
8910 | /* The argument must be a nonnegative integer constant. | |
8911 | It counts the number of frames to scan up the stack. | |
8912 | The value is the address of that frame. */ | |
8913 | case BUILT_IN_RETURN_ADDRESS: | |
8914 | /* The argument must be a nonnegative integer constant. | |
8915 | It counts the number of frames to scan up the stack. | |
8916 | The value is the return address saved in that frame. */ | |
8917 | if (arglist == 0) | |
8918 | /* Warning about missing arg was already issued. */ | |
8919 | return const0_rtx; | |
8920 | else if (TREE_CODE (TREE_VALUE (arglist)) != INTEGER_CST | |
8921 | || tree_int_cst_sgn (TREE_VALUE (arglist)) < 0) | |
8922 | { | |
8923 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS) | |
8924 | error ("invalid arg to `__builtin_frame_address'"); | |
8925 | else | |
8926 | error ("invalid arg to `__builtin_return_address'"); | |
8927 | return const0_rtx; | |
8928 | } | |
8929 | else | |
8930 | { | |
8931 | rtx tem = expand_builtin_return_addr (DECL_FUNCTION_CODE (fndecl), | |
8932 | TREE_INT_CST_LOW (TREE_VALUE (arglist)), | |
8933 | hard_frame_pointer_rtx); | |
ee33823f | 8934 | |
b93a436e JL |
8935 | /* Some ports cannot access arbitrary stack frames. */ |
8936 | if (tem == NULL) | |
8937 | { | |
8938 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS) | |
8939 | warning ("unsupported arg to `__builtin_frame_address'"); | |
8940 | else | |
8941 | warning ("unsupported arg to `__builtin_return_address'"); | |
8942 | return const0_rtx; | |
8943 | } | |
ee33823f | 8944 | |
b93a436e JL |
8945 | /* For __builtin_frame_address, return what we've got. */ |
8946 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS) | |
8947 | return tem; | |
ee33823f | 8948 | |
b93a436e JL |
8949 | if (GET_CODE (tem) != REG) |
8950 | tem = copy_to_reg (tem); | |
8951 | return tem; | |
8952 | } | |
ee33823f | 8953 | |
b93a436e JL |
8954 | /* Returns the address of the area where the structure is returned. |
8955 | 0 otherwise. */ | |
8956 | case BUILT_IN_AGGREGATE_INCOMING_ADDRESS: | |
8957 | if (arglist != 0 | |
8958 | || ! AGGREGATE_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl))) | |
8959 | || GET_CODE (DECL_RTL (DECL_RESULT (current_function_decl))) != MEM) | |
8960 | return const0_rtx; | |
8961 | else | |
8962 | return XEXP (DECL_RTL (DECL_RESULT (current_function_decl)), 0); | |
ee33823f | 8963 | |
b93a436e JL |
8964 | case BUILT_IN_ALLOCA: |
8965 | if (arglist == 0 | |
8966 | /* Arg could be non-integer if user redeclared this fcn wrong. */ | |
8967 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != INTEGER_TYPE) | |
8968 | break; | |
bbf6f052 | 8969 | |
b93a436e JL |
8970 | /* Compute the argument. */ |
8971 | op0 = expand_expr (TREE_VALUE (arglist), NULL_RTX, VOIDmode, 0); | |
bbf6f052 | 8972 | |
b93a436e JL |
8973 | /* Allocate the desired space. */ |
8974 | return allocate_dynamic_stack_space (op0, target, BITS_PER_UNIT); | |
ca695ac9 | 8975 | |
b93a436e JL |
8976 | case BUILT_IN_FFS: |
8977 | /* If not optimizing, call the library function. */ | |
8978 | if (!optimize && ! CALLED_AS_BUILT_IN (fndecl)) | |
8979 | break; | |
ca695ac9 | 8980 | |
b93a436e JL |
8981 | if (arglist == 0 |
8982 | /* Arg could be non-integer if user redeclared this fcn wrong. */ | |
8983 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != INTEGER_TYPE) | |
8984 | break; | |
ca695ac9 | 8985 | |
b93a436e JL |
8986 | /* Compute the argument. */ |
8987 | op0 = expand_expr (TREE_VALUE (arglist), subtarget, VOIDmode, 0); | |
8988 | /* Compute ffs, into TARGET if possible. | |
8989 | Set TARGET to wherever the result comes back. */ | |
8990 | target = expand_unop (TYPE_MODE (TREE_TYPE (TREE_VALUE (arglist))), | |
8991 | ffs_optab, op0, target, 1); | |
8992 | if (target == 0) | |
8993 | abort (); | |
8994 | return target; | |
bbf6f052 | 8995 | |
b93a436e JL |
8996 | case BUILT_IN_STRLEN: |
8997 | /* If not optimizing, call the library function. */ | |
8998 | if (!optimize && ! CALLED_AS_BUILT_IN (fndecl)) | |
8999 | break; | |
bbf6f052 | 9000 | |
b93a436e JL |
9001 | if (arglist == 0 |
9002 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
9003 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE) | |
9004 | break; | |
9005 | else | |
9006 | { | |
9007 | tree src = TREE_VALUE (arglist); | |
9008 | tree len = c_strlen (src); | |
bbf6f052 | 9009 | |
b93a436e JL |
9010 | int align |
9011 | = get_pointer_alignment (src, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
46b68a37 | 9012 | |
b93a436e JL |
9013 | rtx result, src_rtx, char_rtx; |
9014 | enum machine_mode insn_mode = value_mode, char_mode; | |
9015 | enum insn_code icode; | |
46b68a37 | 9016 | |
b93a436e JL |
9017 | /* If the length is known, just return it. */ |
9018 | if (len != 0) | |
9019 | return expand_expr (len, target, mode, EXPAND_MEMORY_USE_BAD); | |
956d6950 | 9020 | |
b93a436e JL |
9021 | /* If SRC is not a pointer type, don't do this operation inline. */ |
9022 | if (align == 0) | |
9023 | break; | |
bbf6f052 | 9024 | |
b93a436e | 9025 | /* Call a function if we can't compute strlen in the right mode. */ |
bbf6f052 | 9026 | |
b93a436e JL |
9027 | while (insn_mode != VOIDmode) |
9028 | { | |
9029 | icode = strlen_optab->handlers[(int) insn_mode].insn_code; | |
9030 | if (icode != CODE_FOR_nothing) | |
9031 | break; | |
ca695ac9 | 9032 | |
b93a436e JL |
9033 | insn_mode = GET_MODE_WIDER_MODE (insn_mode); |
9034 | } | |
9035 | if (insn_mode == VOIDmode) | |
9036 | break; | |
ca695ac9 | 9037 | |
b93a436e JL |
9038 | /* Make a place to write the result of the instruction. */ |
9039 | result = target; | |
9040 | if (! (result != 0 | |
9041 | && GET_CODE (result) == REG | |
9042 | && GET_MODE (result) == insn_mode | |
9043 | && REGNO (result) >= FIRST_PSEUDO_REGISTER)) | |
9044 | result = gen_reg_rtx (insn_mode); | |
ca695ac9 | 9045 | |
b93a436e | 9046 | /* Make sure the operands are acceptable to the predicates. */ |
ca695ac9 | 9047 | |
b93a436e JL |
9048 | if (! (*insn_operand_predicate[(int)icode][0]) (result, insn_mode)) |
9049 | result = gen_reg_rtx (insn_mode); | |
9050 | src_rtx = memory_address (BLKmode, | |
9051 | expand_expr (src, NULL_RTX, ptr_mode, | |
9052 | EXPAND_NORMAL)); | |
bbf6f052 | 9053 | |
b93a436e JL |
9054 | if (! (*insn_operand_predicate[(int)icode][1]) (src_rtx, Pmode)) |
9055 | src_rtx = copy_to_mode_reg (Pmode, src_rtx); | |
bbf6f052 | 9056 | |
b93a436e JL |
9057 | /* Check the string is readable and has an end. */ |
9058 | if (flag_check_memory_usage) | |
9059 | emit_library_call (chkr_check_str_libfunc, 1, VOIDmode, 2, | |
9060 | src_rtx, ptr_mode, | |
9061 | GEN_INT (MEMORY_USE_RO), | |
9062 | TYPE_MODE (integer_type_node)); | |
bbf6f052 | 9063 | |
b93a436e JL |
9064 | char_rtx = const0_rtx; |
9065 | char_mode = insn_operand_mode[(int)icode][2]; | |
9066 | if (! (*insn_operand_predicate[(int)icode][2]) (char_rtx, char_mode)) | |
9067 | char_rtx = copy_to_mode_reg (char_mode, char_rtx); | |
bbf6f052 | 9068 | |
b93a436e JL |
9069 | emit_insn (GEN_FCN (icode) (result, |
9070 | gen_rtx_MEM (BLKmode, src_rtx), | |
9071 | char_rtx, GEN_INT (align))); | |
bbf6f052 | 9072 | |
b93a436e JL |
9073 | /* Return the value in the proper mode for this function. */ |
9074 | if (GET_MODE (result) == value_mode) | |
9075 | return result; | |
9076 | else if (target != 0) | |
9077 | { | |
9078 | convert_move (target, result, 0); | |
9079 | return target; | |
9080 | } | |
9081 | else | |
9082 | return convert_to_mode (value_mode, result, 0); | |
9083 | } | |
bbf6f052 | 9084 | |
b93a436e JL |
9085 | case BUILT_IN_STRCPY: |
9086 | /* If not optimizing, call the library function. */ | |
9087 | if (!optimize && ! CALLED_AS_BUILT_IN (fndecl)) | |
9088 | break; | |
bbf6f052 | 9089 | |
b93a436e JL |
9090 | if (arglist == 0 |
9091 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
9092 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE | |
9093 | || TREE_CHAIN (arglist) == 0 | |
9094 | || TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (arglist)))) != POINTER_TYPE) | |
9095 | break; | |
9096 | else | |
9097 | { | |
9098 | tree len = c_strlen (TREE_VALUE (TREE_CHAIN (arglist))); | |
bbf6f052 | 9099 | |
b93a436e JL |
9100 | if (len == 0) |
9101 | break; | |
bbf6f052 | 9102 | |
b93a436e | 9103 | len = size_binop (PLUS_EXPR, len, integer_one_node); |
6d100794 | 9104 | |
b93a436e JL |
9105 | chainon (arglist, build_tree_list (NULL_TREE, len)); |
9106 | } | |
6d100794 | 9107 | |
b93a436e JL |
9108 | /* Drops in. */ |
9109 | case BUILT_IN_MEMCPY: | |
9110 | /* If not optimizing, call the library function. */ | |
9111 | if (!optimize && ! CALLED_AS_BUILT_IN (fndecl)) | |
9112 | break; | |
e7c33f54 | 9113 | |
b93a436e JL |
9114 | if (arglist == 0 |
9115 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
9116 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE | |
9117 | || TREE_CHAIN (arglist) == 0 | |
9118 | || (TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (arglist)))) | |
9119 | != POINTER_TYPE) | |
9120 | || TREE_CHAIN (TREE_CHAIN (arglist)) == 0 | |
9121 | || (TREE_CODE (TREE_TYPE (TREE_VALUE | |
9122 | (TREE_CHAIN (TREE_CHAIN (arglist))))) | |
9123 | != INTEGER_TYPE)) | |
9124 | break; | |
9125 | else | |
9126 | { | |
9127 | tree dest = TREE_VALUE (arglist); | |
9128 | tree src = TREE_VALUE (TREE_CHAIN (arglist)); | |
9129 | tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); | |
e7c33f54 | 9130 | |
b93a436e JL |
9131 | int src_align |
9132 | = get_pointer_alignment (src, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
9133 | int dest_align | |
9134 | = get_pointer_alignment (dest, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
55a6ba9f | 9135 | rtx dest_mem, src_mem, dest_addr, len_rtx; |
e7c33f54 | 9136 | |
b93a436e JL |
9137 | /* If either SRC or DEST is not a pointer type, don't do |
9138 | this operation in-line. */ | |
9139 | if (src_align == 0 || dest_align == 0) | |
9140 | { | |
9141 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_STRCPY) | |
9142 | TREE_CHAIN (TREE_CHAIN (arglist)) = 0; | |
9143 | break; | |
9144 | } | |
e7c33f54 | 9145 | |
55a6ba9f JC |
9146 | dest_mem = get_memory_rtx (dest); |
9147 | src_mem = get_memory_rtx (src); | |
b93a436e | 9148 | len_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0); |
e7c33f54 | 9149 | |
b93a436e JL |
9150 | /* Just copy the rights of SRC to the rights of DEST. */ |
9151 | if (flag_check_memory_usage) | |
9152 | emit_library_call (chkr_copy_bitmap_libfunc, 1, VOIDmode, 3, | |
55a6ba9f JC |
9153 | XEXP (dest_mem, 0), ptr_mode, |
9154 | XEXP (src_mem, 0), ptr_mode, | |
b93a436e | 9155 | len_rtx, TYPE_MODE (sizetype)); |
e7c33f54 | 9156 | |
b93a436e JL |
9157 | /* Copy word part most expediently. */ |
9158 | dest_addr | |
9159 | = emit_block_move (dest_mem, src_mem, len_rtx, | |
9160 | MIN (src_align, dest_align)); | |
e7c33f54 | 9161 | |
b93a436e | 9162 | if (dest_addr == 0) |
55a6ba9f | 9163 | dest_addr = force_operand (XEXP (dest_mem, 0), NULL_RTX); |
e7c33f54 | 9164 | |
b93a436e JL |
9165 | return dest_addr; |
9166 | } | |
e7c33f54 | 9167 | |
b93a436e JL |
9168 | case BUILT_IN_MEMSET: |
9169 | /* If not optimizing, call the library function. */ | |
9170 | if (!optimize && ! CALLED_AS_BUILT_IN (fndecl)) | |
9171 | break; | |
e7c33f54 | 9172 | |
b93a436e JL |
9173 | if (arglist == 0 |
9174 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
9175 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE | |
9176 | || TREE_CHAIN (arglist) == 0 | |
9177 | || (TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (arglist)))) | |
9178 | != INTEGER_TYPE) | |
9179 | || TREE_CHAIN (TREE_CHAIN (arglist)) == 0 | |
9180 | || (INTEGER_TYPE | |
9181 | != (TREE_CODE (TREE_TYPE | |
9182 | (TREE_VALUE | |
9183 | (TREE_CHAIN (TREE_CHAIN (arglist)))))))) | |
9184 | break; | |
9185 | else | |
9186 | { | |
9187 | tree dest = TREE_VALUE (arglist); | |
9188 | tree val = TREE_VALUE (TREE_CHAIN (arglist)); | |
9189 | tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); | |
e7c33f54 | 9190 | |
b93a436e JL |
9191 | int dest_align |
9192 | = get_pointer_alignment (dest, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
55a6ba9f | 9193 | rtx dest_mem, dest_addr, len_rtx; |
e7c33f54 | 9194 | |
b93a436e JL |
9195 | /* If DEST is not a pointer type, don't do this |
9196 | operation in-line. */ | |
9197 | if (dest_align == 0) | |
9198 | break; | |
bbf6f052 | 9199 | |
bf931ec8 JW |
9200 | /* If the arguments have side-effects, then we can only evaluate |
9201 | them at most once. The following code evaluates them twice if | |
9202 | they are not constants because we break out to expand_call | |
9203 | in that case. They can't be constants if they have side-effects | |
9204 | so we can check for that first. Alternatively, we could call | |
9205 | save_expr to make multiple evaluation safe. */ | |
9206 | if (TREE_SIDE_EFFECTS (val) || TREE_SIDE_EFFECTS (len)) | |
9207 | break; | |
9208 | ||
b93a436e JL |
9209 | /* If VAL is not 0, don't do this operation in-line. */ |
9210 | if (expand_expr (val, NULL_RTX, VOIDmode, 0) != const0_rtx) | |
9211 | break; | |
bbf6f052 | 9212 | |
b93a436e JL |
9213 | /* If LEN does not expand to a constant, don't do this |
9214 | operation in-line. */ | |
9215 | len_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0); | |
9216 | if (GET_CODE (len_rtx) != CONST_INT) | |
9217 | break; | |
bbf6f052 | 9218 | |
55a6ba9f | 9219 | dest_mem = get_memory_rtx (dest); |
b93a436e JL |
9220 | |
9221 | /* Just check DST is writable and mark it as readable. */ | |
9222 | if (flag_check_memory_usage) | |
9223 | emit_library_call (chkr_check_addr_libfunc, 1, VOIDmode, 3, | |
55a6ba9f | 9224 | XEXP (dest_mem, 0), ptr_mode, |
b93a436e JL |
9225 | len_rtx, TYPE_MODE (sizetype), |
9226 | GEN_INT (MEMORY_USE_WO), | |
9227 | TYPE_MODE (integer_type_node)); | |
bbf6f052 | 9228 | |
bbf6f052 | 9229 | |
b93a436e | 9230 | dest_addr = clear_storage (dest_mem, len_rtx, dest_align); |
bbf6f052 | 9231 | |
b93a436e | 9232 | if (dest_addr == 0) |
55a6ba9f | 9233 | dest_addr = force_operand (XEXP (dest_mem, 0), NULL_RTX); |
bbf6f052 | 9234 | |
b93a436e JL |
9235 | return dest_addr; |
9236 | } | |
bbf6f052 | 9237 | |
b93a436e JL |
9238 | /* These comparison functions need an instruction that returns an actual |
9239 | index. An ordinary compare that just sets the condition codes | |
9240 | is not enough. */ | |
9241 | #ifdef HAVE_cmpstrsi | |
9242 | case BUILT_IN_STRCMP: | |
9243 | /* If not optimizing, call the library function. */ | |
9244 | if (!optimize && ! CALLED_AS_BUILT_IN (fndecl)) | |
9245 | break; | |
bbf6f052 | 9246 | |
b93a436e JL |
9247 | /* If we need to check memory accesses, call the library function. */ |
9248 | if (flag_check_memory_usage) | |
9249 | break; | |
bbf6f052 | 9250 | |
b93a436e JL |
9251 | if (arglist == 0 |
9252 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
9253 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE | |
9254 | || TREE_CHAIN (arglist) == 0 | |
9255 | || TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (arglist)))) != POINTER_TYPE) | |
9256 | break; | |
9257 | else if (!HAVE_cmpstrsi) | |
9258 | break; | |
9259 | { | |
9260 | tree arg1 = TREE_VALUE (arglist); | |
9261 | tree arg2 = TREE_VALUE (TREE_CHAIN (arglist)); | |
b93a436e | 9262 | tree len, len2; |
a97f5a86 | 9263 | |
b93a436e JL |
9264 | len = c_strlen (arg1); |
9265 | if (len) | |
9266 | len = size_binop (PLUS_EXPR, integer_one_node, len); | |
9267 | len2 = c_strlen (arg2); | |
9268 | if (len2) | |
9269 | len2 = size_binop (PLUS_EXPR, integer_one_node, len2); | |
e9cdf6e4 | 9270 | |
b93a436e JL |
9271 | /* If we don't have a constant length for the first, use the length |
9272 | of the second, if we know it. We don't require a constant for | |
9273 | this case; some cost analysis could be done if both are available | |
9274 | but neither is constant. For now, assume they're equally cheap. | |
e9cdf6e4 | 9275 | |
b93a436e JL |
9276 | If both strings have constant lengths, use the smaller. This |
9277 | could arise if optimization results in strcpy being called with | |
9278 | two fixed strings, or if the code was machine-generated. We should | |
9279 | add some code to the `memcmp' handler below to deal with such | |
9280 | situations, someday. */ | |
9281 | if (!len || TREE_CODE (len) != INTEGER_CST) | |
9282 | { | |
9283 | if (len2) | |
9284 | len = len2; | |
9285 | else if (len == 0) | |
9286 | break; | |
9287 | } | |
9288 | else if (len2 && TREE_CODE (len2) == INTEGER_CST) | |
9289 | { | |
9290 | if (tree_int_cst_lt (len2, len)) | |
9291 | len = len2; | |
9292 | } | |
bbf6f052 | 9293 | |
b93a436e JL |
9294 | chainon (arglist, build_tree_list (NULL_TREE, len)); |
9295 | } | |
bbf6f052 | 9296 | |
b93a436e JL |
9297 | /* Drops in. */ |
9298 | case BUILT_IN_MEMCMP: | |
9299 | /* If not optimizing, call the library function. */ | |
9300 | if (!optimize && ! CALLED_AS_BUILT_IN (fndecl)) | |
9301 | break; | |
bbf6f052 | 9302 | |
b93a436e JL |
9303 | /* If we need to check memory accesses, call the library function. */ |
9304 | if (flag_check_memory_usage) | |
9305 | break; | |
bbf6f052 | 9306 | |
b93a436e JL |
9307 | if (arglist == 0 |
9308 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
9309 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE | |
9310 | || TREE_CHAIN (arglist) == 0 | |
9311 | || TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (arglist)))) != POINTER_TYPE | |
9312 | || TREE_CHAIN (TREE_CHAIN (arglist)) == 0 | |
9313 | || TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))))) != INTEGER_TYPE) | |
9314 | break; | |
9315 | else if (!HAVE_cmpstrsi) | |
9316 | break; | |
9317 | { | |
9318 | tree arg1 = TREE_VALUE (arglist); | |
9319 | tree arg2 = TREE_VALUE (TREE_CHAIN (arglist)); | |
9320 | tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); | |
9321 | rtx result; | |
0842a179 | 9322 | |
b93a436e JL |
9323 | int arg1_align |
9324 | = get_pointer_alignment (arg1, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
9325 | int arg2_align | |
9326 | = get_pointer_alignment (arg2, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
9327 | enum machine_mode insn_mode | |
9328 | = insn_operand_mode[(int) CODE_FOR_cmpstrsi][0]; | |
0842a179 | 9329 | |
b93a436e JL |
9330 | /* If we don't have POINTER_TYPE, call the function. */ |
9331 | if (arg1_align == 0 || arg2_align == 0) | |
9332 | { | |
9333 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_STRCMP) | |
9334 | TREE_CHAIN (TREE_CHAIN (arglist)) = 0; | |
9335 | break; | |
9336 | } | |
bbf6f052 | 9337 | |
b93a436e JL |
9338 | /* Make a place to write the result of the instruction. */ |
9339 | result = target; | |
9340 | if (! (result != 0 | |
9341 | && GET_CODE (result) == REG && GET_MODE (result) == insn_mode | |
9342 | && REGNO (result) >= FIRST_PSEUDO_REGISTER)) | |
9343 | result = gen_reg_rtx (insn_mode); | |
bbf6f052 | 9344 | |
55a6ba9f JC |
9345 | emit_insn (gen_cmpstrsi (result, get_memory_rtx (arg1), |
9346 | get_memory_rtx (arg2), | |
b93a436e JL |
9347 | expand_expr (len, NULL_RTX, VOIDmode, 0), |
9348 | GEN_INT (MIN (arg1_align, arg2_align)))); | |
bbf6f052 | 9349 | |
b93a436e JL |
9350 | /* Return the value in the proper mode for this function. */ |
9351 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
9352 | if (GET_MODE (result) == mode) | |
9353 | return result; | |
9354 | else if (target != 0) | |
9355 | { | |
9356 | convert_move (target, result, 0); | |
9357 | return target; | |
9358 | } | |
9359 | else | |
9360 | return convert_to_mode (mode, result, 0); | |
9361 | } | |
9362 | #else | |
9363 | case BUILT_IN_STRCMP: | |
9364 | case BUILT_IN_MEMCMP: | |
9365 | break; | |
9366 | #endif | |
bbf6f052 | 9367 | |
b93a436e JL |
9368 | case BUILT_IN_SETJMP: |
9369 | if (arglist == 0 | |
9370 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE) | |
9371 | break; | |
6fd1c67b RH |
9372 | else |
9373 | { | |
9374 | rtx buf_addr = expand_expr (TREE_VALUE (arglist), subtarget, | |
9375 | VOIDmode, 0); | |
9376 | rtx lab = gen_label_rtx (); | |
9377 | rtx ret = expand_builtin_setjmp (buf_addr, target, lab, lab); | |
9378 | emit_label (lab); | |
9379 | return ret; | |
9380 | } | |
bbf6f052 | 9381 | |
6fd1c67b RH |
9382 | /* __builtin_longjmp is passed a pointer to an array of five words. |
9383 | It's similar to the C library longjmp function but works with | |
9384 | __builtin_setjmp above. */ | |
b93a436e JL |
9385 | case BUILT_IN_LONGJMP: |
9386 | if (arglist == 0 || TREE_CHAIN (arglist) == 0 | |
9387 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE) | |
9388 | break; | |
b93a436e | 9389 | else |
b93a436e | 9390 | { |
6fd1c67b RH |
9391 | rtx buf_addr = expand_expr (TREE_VALUE (arglist), subtarget, |
9392 | VOIDmode, 0); | |
9393 | rtx value = expand_expr (TREE_VALUE (TREE_CHAIN (arglist)), | |
3e2b9a3d | 9394 | NULL_RTX, VOIDmode, 0); |
e0cd0770 JC |
9395 | |
9396 | if (value != const1_rtx) | |
9397 | { | |
9398 | error ("__builtin_longjmp second argument must be 1"); | |
9399 | return const0_rtx; | |
9400 | } | |
9401 | ||
6fd1c67b RH |
9402 | expand_builtin_longjmp (buf_addr, value); |
9403 | return const0_rtx; | |
b93a436e | 9404 | } |
bbf6f052 | 9405 | |
e0cd0770 JC |
9406 | case BUILT_IN_TRAP: |
9407 | #ifdef HAVE_trap | |
9408 | if (HAVE_trap) | |
9409 | emit_insn (gen_trap ()); | |
9410 | else | |
9411 | #endif | |
9412 | error ("__builtin_trap not supported by this target"); | |
9413 | emit_barrier (); | |
9414 | return const0_rtx; | |
9415 | ||
b93a436e JL |
9416 | /* Various hooks for the DWARF 2 __throw routine. */ |
9417 | case BUILT_IN_UNWIND_INIT: | |
9418 | expand_builtin_unwind_init (); | |
9419 | return const0_rtx; | |
71038426 RH |
9420 | case BUILT_IN_DWARF_CFA: |
9421 | return virtual_cfa_rtx; | |
b93a436e JL |
9422 | #ifdef DWARF2_UNWIND_INFO |
9423 | case BUILT_IN_DWARF_FP_REGNUM: | |
9424 | return expand_builtin_dwarf_fp_regnum (); | |
9425 | case BUILT_IN_DWARF_REG_SIZE: | |
9426 | return expand_builtin_dwarf_reg_size (TREE_VALUE (arglist), target); | |
fb2ca25a | 9427 | #endif |
b93a436e JL |
9428 | case BUILT_IN_FROB_RETURN_ADDR: |
9429 | return expand_builtin_frob_return_addr (TREE_VALUE (arglist)); | |
9430 | case BUILT_IN_EXTRACT_RETURN_ADDR: | |
9431 | return expand_builtin_extract_return_addr (TREE_VALUE (arglist)); | |
71038426 RH |
9432 | case BUILT_IN_EH_RETURN: |
9433 | expand_builtin_eh_return (TREE_VALUE (arglist), | |
9434 | TREE_VALUE (TREE_CHAIN (arglist)), | |
9435 | TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)))); | |
b93a436e | 9436 | return const0_rtx; |
ca695ac9 | 9437 | |
b93a436e JL |
9438 | default: /* just do library call, if unknown builtin */ |
9439 | error ("built-in function `%s' not currently supported", | |
9440 | IDENTIFIER_POINTER (DECL_NAME (fndecl))); | |
ca695ac9 | 9441 | } |
0006469d | 9442 | |
b93a436e JL |
9443 | /* The switch statement above can drop through to cause the function |
9444 | to be called normally. */ | |
0006469d | 9445 | |
b93a436e | 9446 | return expand_call (exp, target, ignore); |
ca695ac9 | 9447 | } |
b93a436e JL |
9448 | \f |
9449 | /* Built-in functions to perform an untyped call and return. */ | |
0006469d | 9450 | |
b93a436e JL |
9451 | /* For each register that may be used for calling a function, this |
9452 | gives a mode used to copy the register's value. VOIDmode indicates | |
9453 | the register is not used for calling a function. If the machine | |
9454 | has register windows, this gives only the outbound registers. | |
9455 | INCOMING_REGNO gives the corresponding inbound register. */ | |
9456 | static enum machine_mode apply_args_mode[FIRST_PSEUDO_REGISTER]; | |
0006469d | 9457 | |
b93a436e JL |
9458 | /* For each register that may be used for returning values, this gives |
9459 | a mode used to copy the register's value. VOIDmode indicates the | |
9460 | register is not used for returning values. If the machine has | |
9461 | register windows, this gives only the outbound registers. | |
9462 | INCOMING_REGNO gives the corresponding inbound register. */ | |
9463 | static enum machine_mode apply_result_mode[FIRST_PSEUDO_REGISTER]; | |
0006469d | 9464 | |
b93a436e JL |
9465 | /* For each register that may be used for calling a function, this |
9466 | gives the offset of that register into the block returned by | |
9467 | __builtin_apply_args. 0 indicates that the register is not | |
9468 | used for calling a function. */ | |
9469 | static int apply_args_reg_offset[FIRST_PSEUDO_REGISTER]; | |
9470 | ||
9471 | /* Return the offset of register REGNO into the block returned by | |
9472 | __builtin_apply_args. This is not declared static, since it is | |
9473 | needed in objc-act.c. */ | |
0006469d | 9474 | |
b93a436e JL |
9475 | int |
9476 | apply_args_register_offset (regno) | |
9477 | int regno; | |
9478 | { | |
9479 | apply_args_size (); | |
0006469d | 9480 | |
b93a436e JL |
9481 | /* Arguments are always put in outgoing registers (in the argument |
9482 | block) if such make sense. */ | |
9483 | #ifdef OUTGOING_REGNO | |
9484 | regno = OUTGOING_REGNO(regno); | |
9485 | #endif | |
9486 | return apply_args_reg_offset[regno]; | |
9487 | } | |
904762c8 | 9488 | |
b93a436e JL |
9489 | /* Return the size required for the block returned by __builtin_apply_args, |
9490 | and initialize apply_args_mode. */ | |
9491 | ||
9492 | static int | |
9493 | apply_args_size () | |
0006469d | 9494 | { |
b93a436e JL |
9495 | static int size = -1; |
9496 | int align, regno; | |
2f6e6d22 | 9497 | enum machine_mode mode; |
0006469d | 9498 | |
b93a436e JL |
9499 | /* The values computed by this function never change. */ |
9500 | if (size < 0) | |
ca695ac9 | 9501 | { |
b93a436e JL |
9502 | /* The first value is the incoming arg-pointer. */ |
9503 | size = GET_MODE_SIZE (Pmode); | |
0006469d | 9504 | |
b93a436e JL |
9505 | /* The second value is the structure value address unless this is |
9506 | passed as an "invisible" first argument. */ | |
9507 | if (struct_value_rtx) | |
9508 | size += GET_MODE_SIZE (Pmode); | |
0006469d | 9509 | |
b93a436e JL |
9510 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) |
9511 | if (FUNCTION_ARG_REGNO_P (regno)) | |
9512 | { | |
9513 | /* Search for the proper mode for copying this register's | |
9514 | value. I'm not sure this is right, but it works so far. */ | |
9515 | enum machine_mode best_mode = VOIDmode; | |
0006469d | 9516 | |
b93a436e JL |
9517 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); |
9518 | mode != VOIDmode; | |
9519 | mode = GET_MODE_WIDER_MODE (mode)) | |
9520 | if (HARD_REGNO_MODE_OK (regno, mode) | |
9521 | && HARD_REGNO_NREGS (regno, mode) == 1) | |
9522 | best_mode = mode; | |
0006469d | 9523 | |
b93a436e JL |
9524 | if (best_mode == VOIDmode) |
9525 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); | |
9526 | mode != VOIDmode; | |
9527 | mode = GET_MODE_WIDER_MODE (mode)) | |
9528 | if (HARD_REGNO_MODE_OK (regno, mode) | |
9529 | && (mov_optab->handlers[(int) mode].insn_code | |
9530 | != CODE_FOR_nothing)) | |
9531 | best_mode = mode; | |
0006469d | 9532 | |
b93a436e JL |
9533 | mode = best_mode; |
9534 | if (mode == VOIDmode) | |
9535 | abort (); | |
904762c8 | 9536 | |
b93a436e JL |
9537 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; |
9538 | if (size % align != 0) | |
9539 | size = CEIL (size, align) * align; | |
9540 | apply_args_reg_offset[regno] = size; | |
9541 | size += GET_MODE_SIZE (mode); | |
9542 | apply_args_mode[regno] = mode; | |
9543 | } | |
9544 | else | |
9545 | { | |
9546 | apply_args_mode[regno] = VOIDmode; | |
9547 | apply_args_reg_offset[regno] = 0; | |
9548 | } | |
9549 | } | |
9550 | return size; | |
9551 | } | |
0006469d | 9552 | |
b93a436e JL |
9553 | /* Return the size required for the block returned by __builtin_apply, |
9554 | and initialize apply_result_mode. */ | |
904762c8 | 9555 | |
b93a436e JL |
9556 | static int |
9557 | apply_result_size () | |
9558 | { | |
9559 | static int size = -1; | |
9560 | int align, regno; | |
9561 | enum machine_mode mode; | |
0006469d | 9562 | |
b93a436e JL |
9563 | /* The values computed by this function never change. */ |
9564 | if (size < 0) | |
9565 | { | |
9566 | size = 0; | |
0006469d | 9567 | |
b93a436e JL |
9568 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) |
9569 | if (FUNCTION_VALUE_REGNO_P (regno)) | |
9570 | { | |
9571 | /* Search for the proper mode for copying this register's | |
9572 | value. I'm not sure this is right, but it works so far. */ | |
9573 | enum machine_mode best_mode = VOIDmode; | |
0006469d | 9574 | |
b93a436e JL |
9575 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); |
9576 | mode != TImode; | |
9577 | mode = GET_MODE_WIDER_MODE (mode)) | |
9578 | if (HARD_REGNO_MODE_OK (regno, mode)) | |
9579 | best_mode = mode; | |
0006469d | 9580 | |
b93a436e JL |
9581 | if (best_mode == VOIDmode) |
9582 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); | |
9583 | mode != VOIDmode; | |
9584 | mode = GET_MODE_WIDER_MODE (mode)) | |
9585 | if (HARD_REGNO_MODE_OK (regno, mode) | |
9586 | && (mov_optab->handlers[(int) mode].insn_code | |
9587 | != CODE_FOR_nothing)) | |
9588 | best_mode = mode; | |
0006469d | 9589 | |
b93a436e JL |
9590 | mode = best_mode; |
9591 | if (mode == VOIDmode) | |
9592 | abort (); | |
9593 | ||
9594 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
9595 | if (size % align != 0) | |
9596 | size = CEIL (size, align) * align; | |
9597 | size += GET_MODE_SIZE (mode); | |
9598 | apply_result_mode[regno] = mode; | |
9599 | } | |
9600 | else | |
9601 | apply_result_mode[regno] = VOIDmode; | |
9602 | ||
9603 | /* Allow targets that use untyped_call and untyped_return to override | |
9604 | the size so that machine-specific information can be stored here. */ | |
9605 | #ifdef APPLY_RESULT_SIZE | |
9606 | size = APPLY_RESULT_SIZE; | |
9607 | #endif | |
9608 | } | |
9609 | return size; | |
9610 | } | |
0006469d | 9611 | |
b93a436e JL |
9612 | #if defined (HAVE_untyped_call) || defined (HAVE_untyped_return) |
9613 | /* Create a vector describing the result block RESULT. If SAVEP is true, | |
9614 | the result block is used to save the values; otherwise it is used to | |
9615 | restore the values. */ | |
9616 | ||
9617 | static rtx | |
9618 | result_vector (savep, result) | |
9619 | int savep; | |
9620 | rtx result; | |
9621 | { | |
9622 | int regno, size, align, nelts; | |
9623 | enum machine_mode mode; | |
9624 | rtx reg, mem; | |
9625 | rtx *savevec = (rtx *) alloca (FIRST_PSEUDO_REGISTER * sizeof (rtx)); | |
9626 | ||
9627 | size = nelts = 0; | |
9628 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
9629 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
9630 | { | |
9631 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
9632 | if (size % align != 0) | |
9633 | size = CEIL (size, align) * align; | |
9634 | reg = gen_rtx_REG (mode, savep ? regno : INCOMING_REGNO (regno)); | |
9635 | mem = change_address (result, mode, | |
9636 | plus_constant (XEXP (result, 0), size)); | |
9637 | savevec[nelts++] = (savep | |
9638 | ? gen_rtx_SET (VOIDmode, mem, reg) | |
9639 | : gen_rtx_SET (VOIDmode, reg, mem)); | |
9640 | size += GET_MODE_SIZE (mode); | |
ca695ac9 | 9641 | } |
b93a436e JL |
9642 | return gen_rtx_PARALLEL (VOIDmode, gen_rtvec_v (nelts, savevec)); |
9643 | } | |
9644 | #endif /* HAVE_untyped_call or HAVE_untyped_return */ | |
0006469d | 9645 | |
b93a436e JL |
9646 | /* Save the state required to perform an untyped call with the same |
9647 | arguments as were passed to the current function. */ | |
904762c8 | 9648 | |
b93a436e JL |
9649 | static rtx |
9650 | expand_builtin_apply_args () | |
9651 | { | |
9652 | rtx registers; | |
9653 | int size, align, regno; | |
9654 | enum machine_mode mode; | |
0006469d | 9655 | |
b93a436e JL |
9656 | /* Create a block where the arg-pointer, structure value address, |
9657 | and argument registers can be saved. */ | |
9658 | registers = assign_stack_local (BLKmode, apply_args_size (), -1); | |
0cb1d109 | 9659 | |
b93a436e JL |
9660 | /* Walk past the arg-pointer and structure value address. */ |
9661 | size = GET_MODE_SIZE (Pmode); | |
9662 | if (struct_value_rtx) | |
9663 | size += GET_MODE_SIZE (Pmode); | |
0cb1d109 | 9664 | |
b93a436e JL |
9665 | /* Save each register used in calling a function to the block. */ |
9666 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
9667 | if ((mode = apply_args_mode[regno]) != VOIDmode) | |
9668 | { | |
9669 | rtx tem; | |
0cb1d109 | 9670 | |
b93a436e JL |
9671 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; |
9672 | if (size % align != 0) | |
9673 | size = CEIL (size, align) * align; | |
0006469d | 9674 | |
b93a436e | 9675 | tem = gen_rtx_REG (mode, INCOMING_REGNO (regno)); |
0e8c9172 | 9676 | |
b93a436e JL |
9677 | #ifdef STACK_REGS |
9678 | /* For reg-stack.c's stack register household. | |
9679 | Compare with a similar piece of code in function.c. */ | |
0006469d | 9680 | |
b93a436e JL |
9681 | emit_insn (gen_rtx_USE (mode, tem)); |
9682 | #endif | |
0e8c9172 | 9683 | |
b93a436e JL |
9684 | emit_move_insn (change_address (registers, mode, |
9685 | plus_constant (XEXP (registers, 0), | |
9686 | size)), | |
9687 | tem); | |
9688 | size += GET_MODE_SIZE (mode); | |
0e8c9172 | 9689 | } |
0006469d | 9690 | |
b93a436e JL |
9691 | /* Save the arg pointer to the block. */ |
9692 | emit_move_insn (change_address (registers, Pmode, XEXP (registers, 0)), | |
9693 | copy_to_reg (virtual_incoming_args_rtx)); | |
9694 | size = GET_MODE_SIZE (Pmode); | |
0006469d | 9695 | |
b93a436e JL |
9696 | /* Save the structure value address unless this is passed as an |
9697 | "invisible" first argument. */ | |
9698 | if (struct_value_incoming_rtx) | |
9699 | { | |
9700 | emit_move_insn (change_address (registers, Pmode, | |
9701 | plus_constant (XEXP (registers, 0), | |
9702 | size)), | |
9703 | copy_to_reg (struct_value_incoming_rtx)); | |
9704 | size += GET_MODE_SIZE (Pmode); | |
9705 | } | |
0006469d | 9706 | |
b93a436e JL |
9707 | /* Return the address of the block. */ |
9708 | return copy_addr_to_reg (XEXP (registers, 0)); | |
9709 | } | |
0006469d | 9710 | |
b93a436e JL |
9711 | /* Perform an untyped call and save the state required to perform an |
9712 | untyped return of whatever value was returned by the given function. */ | |
0006469d | 9713 | |
b93a436e JL |
9714 | static rtx |
9715 | expand_builtin_apply (function, arguments, argsize) | |
9716 | rtx function, arguments, argsize; | |
9717 | { | |
9718 | int size, align, regno; | |
9719 | enum machine_mode mode; | |
9720 | rtx incoming_args, result, reg, dest, call_insn; | |
9721 | rtx old_stack_level = 0; | |
9722 | rtx call_fusage = 0; | |
0006469d | 9723 | |
b93a436e JL |
9724 | /* Create a block where the return registers can be saved. */ |
9725 | result = assign_stack_local (BLKmode, apply_result_size (), -1); | |
9726 | ||
9727 | /* ??? The argsize value should be adjusted here. */ | |
9728 | ||
9729 | /* Fetch the arg pointer from the ARGUMENTS block. */ | |
9730 | incoming_args = gen_reg_rtx (Pmode); | |
9731 | emit_move_insn (incoming_args, | |
9732 | gen_rtx_MEM (Pmode, arguments)); | |
9733 | #ifndef STACK_GROWS_DOWNWARD | |
9734 | incoming_args = expand_binop (Pmode, sub_optab, incoming_args, argsize, | |
9735 | incoming_args, 0, OPTAB_LIB_WIDEN); | |
9736 | #endif | |
9737 | ||
9738 | /* Perform postincrements before actually calling the function. */ | |
ca695ac9 | 9739 | emit_queue (); |
0006469d | 9740 | |
b93a436e JL |
9741 | /* Push a new argument block and copy the arguments. */ |
9742 | do_pending_stack_adjust (); | |
0006469d | 9743 | |
b93a436e JL |
9744 | /* Save the stack with nonlocal if available */ |
9745 | #ifdef HAVE_save_stack_nonlocal | |
9746 | if (HAVE_save_stack_nonlocal) | |
9747 | emit_stack_save (SAVE_NONLOCAL, &old_stack_level, NULL_RTX); | |
9748 | else | |
9749 | #endif | |
9750 | emit_stack_save (SAVE_BLOCK, &old_stack_level, NULL_RTX); | |
0006469d | 9751 | |
b93a436e JL |
9752 | /* Push a block of memory onto the stack to store the memory arguments. |
9753 | Save the address in a register, and copy the memory arguments. ??? I | |
9754 | haven't figured out how the calling convention macros effect this, | |
9755 | but it's likely that the source and/or destination addresses in | |
9756 | the block copy will need updating in machine specific ways. */ | |
9757 | dest = allocate_dynamic_stack_space (argsize, 0, 0); | |
9758 | emit_block_move (gen_rtx_MEM (BLKmode, dest), | |
9759 | gen_rtx_MEM (BLKmode, incoming_args), | |
9760 | argsize, | |
9761 | PARM_BOUNDARY / BITS_PER_UNIT); | |
9762 | ||
9763 | /* Refer to the argument block. */ | |
9764 | apply_args_size (); | |
9765 | arguments = gen_rtx_MEM (BLKmode, arguments); | |
9766 | ||
9767 | /* Walk past the arg-pointer and structure value address. */ | |
9768 | size = GET_MODE_SIZE (Pmode); | |
9769 | if (struct_value_rtx) | |
9770 | size += GET_MODE_SIZE (Pmode); | |
9771 | ||
9772 | /* Restore each of the registers previously saved. Make USE insns | |
9773 | for each of these registers for use in making the call. */ | |
9774 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
9775 | if ((mode = apply_args_mode[regno]) != VOIDmode) | |
9776 | { | |
9777 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
9778 | if (size % align != 0) | |
9779 | size = CEIL (size, align) * align; | |
9780 | reg = gen_rtx_REG (mode, regno); | |
9781 | emit_move_insn (reg, | |
9782 | change_address (arguments, mode, | |
9783 | plus_constant (XEXP (arguments, 0), | |
9784 | size))); | |
9785 | ||
9786 | use_reg (&call_fusage, reg); | |
9787 | size += GET_MODE_SIZE (mode); | |
9788 | } | |
9789 | ||
9790 | /* Restore the structure value address unless this is passed as an | |
9791 | "invisible" first argument. */ | |
9792 | size = GET_MODE_SIZE (Pmode); | |
9793 | if (struct_value_rtx) | |
0006469d | 9794 | { |
b93a436e JL |
9795 | rtx value = gen_reg_rtx (Pmode); |
9796 | emit_move_insn (value, | |
9797 | change_address (arguments, Pmode, | |
9798 | plus_constant (XEXP (arguments, 0), | |
9799 | size))); | |
9800 | emit_move_insn (struct_value_rtx, value); | |
9801 | if (GET_CODE (struct_value_rtx) == REG) | |
9802 | use_reg (&call_fusage, struct_value_rtx); | |
9803 | size += GET_MODE_SIZE (Pmode); | |
ca695ac9 | 9804 | } |
0006469d | 9805 | |
b93a436e JL |
9806 | /* All arguments and registers used for the call are set up by now! */ |
9807 | function = prepare_call_address (function, NULL_TREE, &call_fusage, 0); | |
0006469d | 9808 | |
b93a436e JL |
9809 | /* Ensure address is valid. SYMBOL_REF is already valid, so no need, |
9810 | and we don't want to load it into a register as an optimization, | |
9811 | because prepare_call_address already did it if it should be done. */ | |
9812 | if (GET_CODE (function) != SYMBOL_REF) | |
9813 | function = memory_address (FUNCTION_MODE, function); | |
0006469d | 9814 | |
b93a436e JL |
9815 | /* Generate the actual call instruction and save the return value. */ |
9816 | #ifdef HAVE_untyped_call | |
9817 | if (HAVE_untyped_call) | |
9818 | emit_call_insn (gen_untyped_call (gen_rtx_MEM (FUNCTION_MODE, function), | |
9819 | result, result_vector (1, result))); | |
9820 | else | |
9821 | #endif | |
9822 | #ifdef HAVE_call_value | |
9823 | if (HAVE_call_value) | |
ca695ac9 | 9824 | { |
b93a436e | 9825 | rtx valreg = 0; |
0006469d | 9826 | |
b93a436e JL |
9827 | /* Locate the unique return register. It is not possible to |
9828 | express a call that sets more than one return register using | |
9829 | call_value; use untyped_call for that. In fact, untyped_call | |
9830 | only needs to save the return registers in the given block. */ | |
9831 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
9832 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
9833 | { | |
9834 | if (valreg) | |
9835 | abort (); /* HAVE_untyped_call required. */ | |
9836 | valreg = gen_rtx_REG (mode, regno); | |
9837 | } | |
0006469d | 9838 | |
b93a436e JL |
9839 | emit_call_insn (gen_call_value (valreg, |
9840 | gen_rtx_MEM (FUNCTION_MODE, function), | |
9841 | const0_rtx, NULL_RTX, const0_rtx)); | |
0006469d | 9842 | |
b93a436e JL |
9843 | emit_move_insn (change_address (result, GET_MODE (valreg), |
9844 | XEXP (result, 0)), | |
9845 | valreg); | |
ca695ac9 | 9846 | } |
b93a436e JL |
9847 | else |
9848 | #endif | |
9849 | abort (); | |
0006469d | 9850 | |
b93a436e JL |
9851 | /* Find the CALL insn we just emitted. */ |
9852 | for (call_insn = get_last_insn (); | |
9853 | call_insn && GET_CODE (call_insn) != CALL_INSN; | |
9854 | call_insn = PREV_INSN (call_insn)) | |
9855 | ; | |
0006469d | 9856 | |
b93a436e JL |
9857 | if (! call_insn) |
9858 | abort (); | |
0006469d | 9859 | |
b93a436e JL |
9860 | /* Put the register usage information on the CALL. If there is already |
9861 | some usage information, put ours at the end. */ | |
9862 | if (CALL_INSN_FUNCTION_USAGE (call_insn)) | |
0006469d | 9863 | { |
b93a436e | 9864 | rtx link; |
0006469d | 9865 | |
b93a436e JL |
9866 | for (link = CALL_INSN_FUNCTION_USAGE (call_insn); XEXP (link, 1) != 0; |
9867 | link = XEXP (link, 1)) | |
9868 | ; | |
9869 | ||
9870 | XEXP (link, 1) = call_fusage; | |
ca695ac9 | 9871 | } |
b93a436e JL |
9872 | else |
9873 | CALL_INSN_FUNCTION_USAGE (call_insn) = call_fusage; | |
0006469d | 9874 | |
b93a436e JL |
9875 | /* Restore the stack. */ |
9876 | #ifdef HAVE_save_stack_nonlocal | |
9877 | if (HAVE_save_stack_nonlocal) | |
9878 | emit_stack_restore (SAVE_NONLOCAL, old_stack_level, NULL_RTX); | |
9879 | else | |
9880 | #endif | |
9881 | emit_stack_restore (SAVE_BLOCK, old_stack_level, NULL_RTX); | |
9882 | ||
9883 | /* Return the address of the result block. */ | |
9884 | return copy_addr_to_reg (XEXP (result, 0)); | |
0006469d | 9885 | } |
bbf6f052 | 9886 | |
b93a436e | 9887 | /* Perform an untyped return. */ |
ca695ac9 JB |
9888 | |
9889 | static void | |
b93a436e JL |
9890 | expand_builtin_return (result) |
9891 | rtx result; | |
bbf6f052 | 9892 | { |
b93a436e JL |
9893 | int size, align, regno; |
9894 | enum machine_mode mode; | |
9895 | rtx reg; | |
9896 | rtx call_fusage = 0; | |
bbf6f052 | 9897 | |
b93a436e JL |
9898 | apply_result_size (); |
9899 | result = gen_rtx_MEM (BLKmode, result); | |
bbf6f052 | 9900 | |
b93a436e JL |
9901 | #ifdef HAVE_untyped_return |
9902 | if (HAVE_untyped_return) | |
ca695ac9 | 9903 | { |
b93a436e JL |
9904 | emit_jump_insn (gen_untyped_return (result, result_vector (0, result))); |
9905 | emit_barrier (); | |
9906 | return; | |
ca695ac9 | 9907 | } |
b93a436e | 9908 | #endif |
1499e0a8 | 9909 | |
b93a436e JL |
9910 | /* Restore the return value and note that each value is used. */ |
9911 | size = 0; | |
9912 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
9913 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
9914 | { | |
9915 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
9916 | if (size % align != 0) | |
9917 | size = CEIL (size, align) * align; | |
9918 | reg = gen_rtx_REG (mode, INCOMING_REGNO (regno)); | |
9919 | emit_move_insn (reg, | |
9920 | change_address (result, mode, | |
9921 | plus_constant (XEXP (result, 0), | |
9922 | size))); | |
9923 | ||
9924 | push_to_sequence (call_fusage); | |
9925 | emit_insn (gen_rtx_USE (VOIDmode, reg)); | |
9926 | call_fusage = get_insns (); | |
9927 | end_sequence (); | |
9928 | size += GET_MODE_SIZE (mode); | |
9929 | } | |
9930 | ||
9931 | /* Put the USE insns before the return. */ | |
9932 | emit_insns (call_fusage); | |
9933 | ||
9934 | /* Return whatever values was restored by jumping directly to the end | |
9935 | of the function. */ | |
9936 | expand_null_return (); | |
ca695ac9 JB |
9937 | } |
9938 | \f | |
b93a436e JL |
9939 | /* Expand code for a post- or pre- increment or decrement |
9940 | and return the RTX for the result. | |
9941 | POST is 1 for postinc/decrements and 0 for preinc/decrements. */ | |
1499e0a8 | 9942 | |
b93a436e JL |
9943 | static rtx |
9944 | expand_increment (exp, post, ignore) | |
9945 | register tree exp; | |
9946 | int post, ignore; | |
ca695ac9 | 9947 | { |
b93a436e JL |
9948 | register rtx op0, op1; |
9949 | register rtx temp, value; | |
9950 | register tree incremented = TREE_OPERAND (exp, 0); | |
9951 | optab this_optab = add_optab; | |
9952 | int icode; | |
9953 | enum machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); | |
9954 | int op0_is_copy = 0; | |
9955 | int single_insn = 0; | |
9956 | /* 1 means we can't store into OP0 directly, | |
9957 | because it is a subreg narrower than a word, | |
9958 | and we don't dare clobber the rest of the word. */ | |
9959 | int bad_subreg = 0; | |
1499e0a8 | 9960 | |
b93a436e JL |
9961 | /* Stabilize any component ref that might need to be |
9962 | evaluated more than once below. */ | |
9963 | if (!post | |
9964 | || TREE_CODE (incremented) == BIT_FIELD_REF | |
9965 | || (TREE_CODE (incremented) == COMPONENT_REF | |
9966 | && (TREE_CODE (TREE_OPERAND (incremented, 0)) != INDIRECT_REF | |
9967 | || DECL_BIT_FIELD (TREE_OPERAND (incremented, 1))))) | |
9968 | incremented = stabilize_reference (incremented); | |
9969 | /* Nested *INCREMENT_EXPRs can happen in C++. We must force innermost | |
9970 | ones into save exprs so that they don't accidentally get evaluated | |
9971 | more than once by the code below. */ | |
9972 | if (TREE_CODE (incremented) == PREINCREMENT_EXPR | |
9973 | || TREE_CODE (incremented) == PREDECREMENT_EXPR) | |
9974 | incremented = save_expr (incremented); | |
e9a25f70 | 9975 | |
b93a436e JL |
9976 | /* Compute the operands as RTX. |
9977 | Note whether OP0 is the actual lvalue or a copy of it: | |
9978 | I believe it is a copy iff it is a register or subreg | |
9979 | and insns were generated in computing it. */ | |
e9a25f70 | 9980 | |
b93a436e JL |
9981 | temp = get_last_insn (); |
9982 | op0 = expand_expr (incremented, NULL_RTX, VOIDmode, EXPAND_MEMORY_USE_RW); | |
e9a25f70 | 9983 | |
b93a436e JL |
9984 | /* If OP0 is a SUBREG made for a promoted variable, we cannot increment |
9985 | in place but instead must do sign- or zero-extension during assignment, | |
9986 | so we copy it into a new register and let the code below use it as | |
9987 | a copy. | |
e9a25f70 | 9988 | |
b93a436e JL |
9989 | Note that we can safely modify this SUBREG since it is know not to be |
9990 | shared (it was made by the expand_expr call above). */ | |
9991 | ||
9992 | if (GET_CODE (op0) == SUBREG && SUBREG_PROMOTED_VAR_P (op0)) | |
9993 | { | |
9994 | if (post) | |
9995 | SUBREG_REG (op0) = copy_to_reg (SUBREG_REG (op0)); | |
9996 | else | |
9997 | bad_subreg = 1; | |
9998 | } | |
9999 | else if (GET_CODE (op0) == SUBREG | |
10000 | && GET_MODE_BITSIZE (GET_MODE (op0)) < BITS_PER_WORD) | |
10001 | { | |
10002 | /* We cannot increment this SUBREG in place. If we are | |
10003 | post-incrementing, get a copy of the old value. Otherwise, | |
10004 | just mark that we cannot increment in place. */ | |
10005 | if (post) | |
10006 | op0 = copy_to_reg (op0); | |
10007 | else | |
10008 | bad_subreg = 1; | |
e9a25f70 JL |
10009 | } |
10010 | ||
b93a436e JL |
10011 | op0_is_copy = ((GET_CODE (op0) == SUBREG || GET_CODE (op0) == REG) |
10012 | && temp != get_last_insn ()); | |
10013 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, | |
10014 | EXPAND_MEMORY_USE_BAD); | |
1499e0a8 | 10015 | |
b93a436e JL |
10016 | /* Decide whether incrementing or decrementing. */ |
10017 | if (TREE_CODE (exp) == POSTDECREMENT_EXPR | |
10018 | || TREE_CODE (exp) == PREDECREMENT_EXPR) | |
10019 | this_optab = sub_optab; | |
10020 | ||
10021 | /* Convert decrement by a constant into a negative increment. */ | |
10022 | if (this_optab == sub_optab | |
10023 | && GET_CODE (op1) == CONST_INT) | |
ca695ac9 | 10024 | { |
b93a436e JL |
10025 | op1 = GEN_INT (- INTVAL (op1)); |
10026 | this_optab = add_optab; | |
ca695ac9 | 10027 | } |
1499e0a8 | 10028 | |
b93a436e JL |
10029 | /* For a preincrement, see if we can do this with a single instruction. */ |
10030 | if (!post) | |
10031 | { | |
10032 | icode = (int) this_optab->handlers[(int) mode].insn_code; | |
10033 | if (icode != (int) CODE_FOR_nothing | |
10034 | /* Make sure that OP0 is valid for operands 0 and 1 | |
10035 | of the insn we want to queue. */ | |
10036 | && (*insn_operand_predicate[icode][0]) (op0, mode) | |
10037 | && (*insn_operand_predicate[icode][1]) (op0, mode) | |
10038 | && (*insn_operand_predicate[icode][2]) (op1, mode)) | |
10039 | single_insn = 1; | |
10040 | } | |
bbf6f052 | 10041 | |
b93a436e JL |
10042 | /* If OP0 is not the actual lvalue, but rather a copy in a register, |
10043 | then we cannot just increment OP0. We must therefore contrive to | |
10044 | increment the original value. Then, for postincrement, we can return | |
10045 | OP0 since it is a copy of the old value. For preincrement, expand here | |
10046 | unless we can do it with a single insn. | |
bbf6f052 | 10047 | |
b93a436e JL |
10048 | Likewise if storing directly into OP0 would clobber high bits |
10049 | we need to preserve (bad_subreg). */ | |
10050 | if (op0_is_copy || (!post && !single_insn) || bad_subreg) | |
a358cee0 | 10051 | { |
b93a436e JL |
10052 | /* This is the easiest way to increment the value wherever it is. |
10053 | Problems with multiple evaluation of INCREMENTED are prevented | |
10054 | because either (1) it is a component_ref or preincrement, | |
10055 | in which case it was stabilized above, or (2) it is an array_ref | |
10056 | with constant index in an array in a register, which is | |
10057 | safe to reevaluate. */ | |
10058 | tree newexp = build (((TREE_CODE (exp) == POSTDECREMENT_EXPR | |
10059 | || TREE_CODE (exp) == PREDECREMENT_EXPR) | |
10060 | ? MINUS_EXPR : PLUS_EXPR), | |
10061 | TREE_TYPE (exp), | |
10062 | incremented, | |
10063 | TREE_OPERAND (exp, 1)); | |
a358cee0 | 10064 | |
b93a436e JL |
10065 | while (TREE_CODE (incremented) == NOP_EXPR |
10066 | || TREE_CODE (incremented) == CONVERT_EXPR) | |
10067 | { | |
10068 | newexp = convert (TREE_TYPE (incremented), newexp); | |
10069 | incremented = TREE_OPERAND (incremented, 0); | |
10070 | } | |
bbf6f052 | 10071 | |
b93a436e JL |
10072 | temp = expand_assignment (incremented, newexp, ! post && ! ignore , 0); |
10073 | return post ? op0 : temp; | |
10074 | } | |
bbf6f052 | 10075 | |
b93a436e JL |
10076 | if (post) |
10077 | { | |
10078 | /* We have a true reference to the value in OP0. | |
10079 | If there is an insn to add or subtract in this mode, queue it. | |
10080 | Queueing the increment insn avoids the register shuffling | |
10081 | that often results if we must increment now and first save | |
10082 | the old value for subsequent use. */ | |
bbf6f052 | 10083 | |
b93a436e JL |
10084 | #if 0 /* Turned off to avoid making extra insn for indexed memref. */ |
10085 | op0 = stabilize (op0); | |
10086 | #endif | |
41dfd40c | 10087 | |
b93a436e JL |
10088 | icode = (int) this_optab->handlers[(int) mode].insn_code; |
10089 | if (icode != (int) CODE_FOR_nothing | |
10090 | /* Make sure that OP0 is valid for operands 0 and 1 | |
10091 | of the insn we want to queue. */ | |
10092 | && (*insn_operand_predicate[icode][0]) (op0, mode) | |
10093 | && (*insn_operand_predicate[icode][1]) (op0, mode)) | |
10094 | { | |
10095 | if (! (*insn_operand_predicate[icode][2]) (op1, mode)) | |
10096 | op1 = force_reg (mode, op1); | |
bbf6f052 | 10097 | |
b93a436e JL |
10098 | return enqueue_insn (op0, GEN_FCN (icode) (op0, op0, op1)); |
10099 | } | |
10100 | if (icode != (int) CODE_FOR_nothing && GET_CODE (op0) == MEM) | |
10101 | { | |
10102 | rtx addr = (general_operand (XEXP (op0, 0), mode) | |
10103 | ? force_reg (Pmode, XEXP (op0, 0)) | |
10104 | : copy_to_reg (XEXP (op0, 0))); | |
10105 | rtx temp, result; | |
ca695ac9 | 10106 | |
b93a436e JL |
10107 | op0 = change_address (op0, VOIDmode, addr); |
10108 | temp = force_reg (GET_MODE (op0), op0); | |
10109 | if (! (*insn_operand_predicate[icode][2]) (op1, mode)) | |
10110 | op1 = force_reg (mode, op1); | |
ca695ac9 | 10111 | |
b93a436e JL |
10112 | /* The increment queue is LIFO, thus we have to `queue' |
10113 | the instructions in reverse order. */ | |
10114 | enqueue_insn (op0, gen_move_insn (op0, temp)); | |
10115 | result = enqueue_insn (temp, GEN_FCN (icode) (temp, temp, op1)); | |
10116 | return result; | |
bbf6f052 RK |
10117 | } |
10118 | } | |
ca695ac9 | 10119 | |
b93a436e JL |
10120 | /* Preincrement, or we can't increment with one simple insn. */ |
10121 | if (post) | |
10122 | /* Save a copy of the value before inc or dec, to return it later. */ | |
10123 | temp = value = copy_to_reg (op0); | |
10124 | else | |
10125 | /* Arrange to return the incremented value. */ | |
10126 | /* Copy the rtx because expand_binop will protect from the queue, | |
10127 | and the results of that would be invalid for us to return | |
10128 | if our caller does emit_queue before using our result. */ | |
10129 | temp = copy_rtx (value = op0); | |
bbf6f052 | 10130 | |
b93a436e JL |
10131 | /* Increment however we can. */ |
10132 | op1 = expand_binop (mode, this_optab, value, op1, | |
10133 | flag_check_memory_usage ? NULL_RTX : op0, | |
10134 | TREE_UNSIGNED (TREE_TYPE (exp)), OPTAB_LIB_WIDEN); | |
10135 | /* Make sure the value is stored into OP0. */ | |
10136 | if (op1 != op0) | |
10137 | emit_move_insn (op0, op1); | |
5718612f | 10138 | |
b93a436e JL |
10139 | return temp; |
10140 | } | |
10141 | \f | |
10142 | /* Expand all function calls contained within EXP, innermost ones first. | |
10143 | But don't look within expressions that have sequence points. | |
10144 | For each CALL_EXPR, record the rtx for its value | |
10145 | in the CALL_EXPR_RTL field. */ | |
5718612f | 10146 | |
b93a436e JL |
10147 | static void |
10148 | preexpand_calls (exp) | |
10149 | tree exp; | |
10150 | { | |
10151 | register int nops, i; | |
10152 | int type = TREE_CODE_CLASS (TREE_CODE (exp)); | |
5718612f | 10153 | |
b93a436e JL |
10154 | if (! do_preexpand_calls) |
10155 | return; | |
5718612f | 10156 | |
b93a436e | 10157 | /* Only expressions and references can contain calls. */ |
bbf6f052 | 10158 | |
b93a436e JL |
10159 | if (type != 'e' && type != '<' && type != '1' && type != '2' && type != 'r') |
10160 | return; | |
bbf6f052 | 10161 | |
b93a436e JL |
10162 | switch (TREE_CODE (exp)) |
10163 | { | |
10164 | case CALL_EXPR: | |
10165 | /* Do nothing if already expanded. */ | |
10166 | if (CALL_EXPR_RTL (exp) != 0 | |
10167 | /* Do nothing if the call returns a variable-sized object. */ | |
10168 | || TREE_CODE (TYPE_SIZE (TREE_TYPE(exp))) != INTEGER_CST | |
10169 | /* Do nothing to built-in functions. */ | |
10170 | || (TREE_CODE (TREE_OPERAND (exp, 0)) == ADDR_EXPR | |
10171 | && (TREE_CODE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0)) | |
10172 | == FUNCTION_DECL) | |
10173 | && DECL_BUILT_IN (TREE_OPERAND (TREE_OPERAND (exp, 0), 0)))) | |
10174 | return; | |
bbf6f052 | 10175 | |
b93a436e JL |
10176 | CALL_EXPR_RTL (exp) = expand_call (exp, NULL_RTX, 0); |
10177 | return; | |
bbf6f052 | 10178 | |
b93a436e JL |
10179 | case COMPOUND_EXPR: |
10180 | case COND_EXPR: | |
10181 | case TRUTH_ANDIF_EXPR: | |
10182 | case TRUTH_ORIF_EXPR: | |
10183 | /* If we find one of these, then we can be sure | |
10184 | the adjust will be done for it (since it makes jumps). | |
10185 | Do it now, so that if this is inside an argument | |
10186 | of a function, we don't get the stack adjustment | |
10187 | after some other args have already been pushed. */ | |
10188 | do_pending_stack_adjust (); | |
10189 | return; | |
bbf6f052 | 10190 | |
b93a436e JL |
10191 | case BLOCK: |
10192 | case RTL_EXPR: | |
10193 | case WITH_CLEANUP_EXPR: | |
10194 | case CLEANUP_POINT_EXPR: | |
10195 | case TRY_CATCH_EXPR: | |
10196 | return; | |
bbf6f052 | 10197 | |
b93a436e JL |
10198 | case SAVE_EXPR: |
10199 | if (SAVE_EXPR_RTL (exp) != 0) | |
10200 | return; | |
10201 | ||
10202 | default: | |
10203 | break; | |
ca695ac9 | 10204 | } |
bbf6f052 | 10205 | |
b93a436e JL |
10206 | nops = tree_code_length[(int) TREE_CODE (exp)]; |
10207 | for (i = 0; i < nops; i++) | |
10208 | if (TREE_OPERAND (exp, i) != 0) | |
10209 | { | |
10210 | type = TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, i))); | |
10211 | if (type == 'e' || type == '<' || type == '1' || type == '2' | |
10212 | || type == 'r') | |
10213 | preexpand_calls (TREE_OPERAND (exp, i)); | |
10214 | } | |
10215 | } | |
10216 | \f | |
10217 | /* At the start of a function, record that we have no previously-pushed | |
10218 | arguments waiting to be popped. */ | |
bbf6f052 | 10219 | |
b93a436e JL |
10220 | void |
10221 | init_pending_stack_adjust () | |
10222 | { | |
10223 | pending_stack_adjust = 0; | |
10224 | } | |
bbf6f052 | 10225 | |
b93a436e | 10226 | /* When exiting from function, if safe, clear out any pending stack adjust |
060fbabf JL |
10227 | so the adjustment won't get done. |
10228 | ||
10229 | Note, if the current function calls alloca, then it must have a | |
10230 | frame pointer regardless of the value of flag_omit_frame_pointer. */ | |
bbf6f052 | 10231 | |
b93a436e JL |
10232 | void |
10233 | clear_pending_stack_adjust () | |
10234 | { | |
10235 | #ifdef EXIT_IGNORE_STACK | |
10236 | if (optimize > 0 | |
060fbabf JL |
10237 | && (! flag_omit_frame_pointer || current_function_calls_alloca) |
10238 | && EXIT_IGNORE_STACK | |
b93a436e JL |
10239 | && ! (DECL_INLINE (current_function_decl) && ! flag_no_inline) |
10240 | && ! flag_inline_functions) | |
10241 | pending_stack_adjust = 0; | |
10242 | #endif | |
10243 | } | |
bbf6f052 | 10244 | |
b93a436e JL |
10245 | /* Pop any previously-pushed arguments that have not been popped yet. */ |
10246 | ||
10247 | void | |
10248 | do_pending_stack_adjust () | |
10249 | { | |
10250 | if (inhibit_defer_pop == 0) | |
ca695ac9 | 10251 | { |
b93a436e JL |
10252 | if (pending_stack_adjust != 0) |
10253 | adjust_stack (GEN_INT (pending_stack_adjust)); | |
10254 | pending_stack_adjust = 0; | |
bbf6f052 | 10255 | } |
bbf6f052 RK |
10256 | } |
10257 | \f | |
b93a436e | 10258 | /* Expand conditional expressions. */ |
bbf6f052 | 10259 | |
b93a436e JL |
10260 | /* Generate code to evaluate EXP and jump to LABEL if the value is zero. |
10261 | LABEL is an rtx of code CODE_LABEL, in this function and all the | |
10262 | functions here. */ | |
bbf6f052 | 10263 | |
b93a436e JL |
10264 | void |
10265 | jumpifnot (exp, label) | |
ca695ac9 | 10266 | tree exp; |
b93a436e | 10267 | rtx label; |
bbf6f052 | 10268 | { |
b93a436e JL |
10269 | do_jump (exp, label, NULL_RTX); |
10270 | } | |
bbf6f052 | 10271 | |
b93a436e | 10272 | /* Generate code to evaluate EXP and jump to LABEL if the value is nonzero. */ |
ca695ac9 | 10273 | |
b93a436e JL |
10274 | void |
10275 | jumpif (exp, label) | |
10276 | tree exp; | |
10277 | rtx label; | |
10278 | { | |
10279 | do_jump (exp, NULL_RTX, label); | |
10280 | } | |
ca695ac9 | 10281 | |
b93a436e JL |
10282 | /* Generate code to evaluate EXP and jump to IF_FALSE_LABEL if |
10283 | the result is zero, or IF_TRUE_LABEL if the result is one. | |
10284 | Either of IF_FALSE_LABEL and IF_TRUE_LABEL may be zero, | |
10285 | meaning fall through in that case. | |
ca695ac9 | 10286 | |
b93a436e JL |
10287 | do_jump always does any pending stack adjust except when it does not |
10288 | actually perform a jump. An example where there is no jump | |
10289 | is when EXP is `(foo (), 0)' and IF_FALSE_LABEL is null. | |
ca695ac9 | 10290 | |
b93a436e JL |
10291 | This function is responsible for optimizing cases such as |
10292 | &&, || and comparison operators in EXP. */ | |
5718612f | 10293 | |
b93a436e JL |
10294 | void |
10295 | do_jump (exp, if_false_label, if_true_label) | |
10296 | tree exp; | |
10297 | rtx if_false_label, if_true_label; | |
10298 | { | |
10299 | register enum tree_code code = TREE_CODE (exp); | |
10300 | /* Some cases need to create a label to jump to | |
10301 | in order to properly fall through. | |
10302 | These cases set DROP_THROUGH_LABEL nonzero. */ | |
10303 | rtx drop_through_label = 0; | |
10304 | rtx temp; | |
10305 | rtx comparison = 0; | |
10306 | int i; | |
10307 | tree type; | |
10308 | enum machine_mode mode; | |
ca695ac9 | 10309 | |
dbecbbe4 JL |
10310 | #ifdef MAX_INTEGER_COMPUTATION_MODE |
10311 | check_max_integer_computation_mode (exp); | |
10312 | #endif | |
10313 | ||
b93a436e | 10314 | emit_queue (); |
ca695ac9 | 10315 | |
b93a436e | 10316 | switch (code) |
ca695ac9 | 10317 | { |
b93a436e | 10318 | case ERROR_MARK: |
ca695ac9 | 10319 | break; |
bbf6f052 | 10320 | |
b93a436e JL |
10321 | case INTEGER_CST: |
10322 | temp = integer_zerop (exp) ? if_false_label : if_true_label; | |
10323 | if (temp) | |
10324 | emit_jump (temp); | |
10325 | break; | |
bbf6f052 | 10326 | |
b93a436e JL |
10327 | #if 0 |
10328 | /* This is not true with #pragma weak */ | |
10329 | case ADDR_EXPR: | |
10330 | /* The address of something can never be zero. */ | |
10331 | if (if_true_label) | |
10332 | emit_jump (if_true_label); | |
10333 | break; | |
10334 | #endif | |
bbf6f052 | 10335 | |
b93a436e JL |
10336 | case NOP_EXPR: |
10337 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == COMPONENT_REF | |
10338 | || TREE_CODE (TREE_OPERAND (exp, 0)) == BIT_FIELD_REF | |
10339 | || TREE_CODE (TREE_OPERAND (exp, 0)) == ARRAY_REF) | |
10340 | goto normal; | |
10341 | case CONVERT_EXPR: | |
10342 | /* If we are narrowing the operand, we have to do the compare in the | |
10343 | narrower mode. */ | |
10344 | if ((TYPE_PRECISION (TREE_TYPE (exp)) | |
10345 | < TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (exp, 0))))) | |
10346 | goto normal; | |
10347 | case NON_LVALUE_EXPR: | |
10348 | case REFERENCE_EXPR: | |
10349 | case ABS_EXPR: | |
10350 | case NEGATE_EXPR: | |
10351 | case LROTATE_EXPR: | |
10352 | case RROTATE_EXPR: | |
10353 | /* These cannot change zero->non-zero or vice versa. */ | |
10354 | do_jump (TREE_OPERAND (exp, 0), if_false_label, if_true_label); | |
10355 | break; | |
bbf6f052 | 10356 | |
b93a436e JL |
10357 | #if 0 |
10358 | /* This is never less insns than evaluating the PLUS_EXPR followed by | |
10359 | a test and can be longer if the test is eliminated. */ | |
10360 | case PLUS_EXPR: | |
10361 | /* Reduce to minus. */ | |
10362 | exp = build (MINUS_EXPR, TREE_TYPE (exp), | |
10363 | TREE_OPERAND (exp, 0), | |
10364 | fold (build1 (NEGATE_EXPR, TREE_TYPE (TREE_OPERAND (exp, 1)), | |
10365 | TREE_OPERAND (exp, 1)))); | |
10366 | /* Process as MINUS. */ | |
ca695ac9 | 10367 | #endif |
bbf6f052 | 10368 | |
b93a436e JL |
10369 | case MINUS_EXPR: |
10370 | /* Non-zero iff operands of minus differ. */ | |
10371 | comparison = compare (build (NE_EXPR, TREE_TYPE (exp), | |
10372 | TREE_OPERAND (exp, 0), | |
10373 | TREE_OPERAND (exp, 1)), | |
10374 | NE, NE); | |
10375 | break; | |
bbf6f052 | 10376 | |
b93a436e JL |
10377 | case BIT_AND_EXPR: |
10378 | /* If we are AND'ing with a small constant, do this comparison in the | |
10379 | smallest type that fits. If the machine doesn't have comparisons | |
10380 | that small, it will be converted back to the wider comparison. | |
10381 | This helps if we are testing the sign bit of a narrower object. | |
10382 | combine can't do this for us because it can't know whether a | |
10383 | ZERO_EXTRACT or a compare in a smaller mode exists, but we do. */ | |
bbf6f052 | 10384 | |
b93a436e JL |
10385 | if (! SLOW_BYTE_ACCESS |
10386 | && TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST | |
10387 | && TYPE_PRECISION (TREE_TYPE (exp)) <= HOST_BITS_PER_WIDE_INT | |
10388 | && (i = floor_log2 (TREE_INT_CST_LOW (TREE_OPERAND (exp, 1)))) >= 0 | |
10389 | && (mode = mode_for_size (i + 1, MODE_INT, 0)) != BLKmode | |
10390 | && (type = type_for_mode (mode, 1)) != 0 | |
10391 | && TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (exp)) | |
10392 | && (cmp_optab->handlers[(int) TYPE_MODE (type)].insn_code | |
10393 | != CODE_FOR_nothing)) | |
10394 | { | |
10395 | do_jump (convert (type, exp), if_false_label, if_true_label); | |
10396 | break; | |
10397 | } | |
10398 | goto normal; | |
bbf6f052 | 10399 | |
b93a436e JL |
10400 | case TRUTH_NOT_EXPR: |
10401 | do_jump (TREE_OPERAND (exp, 0), if_true_label, if_false_label); | |
10402 | break; | |
bbf6f052 | 10403 | |
b93a436e JL |
10404 | case TRUTH_ANDIF_EXPR: |
10405 | if (if_false_label == 0) | |
10406 | if_false_label = drop_through_label = gen_label_rtx (); | |
10407 | do_jump (TREE_OPERAND (exp, 0), if_false_label, NULL_RTX); | |
10408 | start_cleanup_deferral (); | |
10409 | do_jump (TREE_OPERAND (exp, 1), if_false_label, if_true_label); | |
10410 | end_cleanup_deferral (); | |
10411 | break; | |
bbf6f052 | 10412 | |
b93a436e JL |
10413 | case TRUTH_ORIF_EXPR: |
10414 | if (if_true_label == 0) | |
10415 | if_true_label = drop_through_label = gen_label_rtx (); | |
10416 | do_jump (TREE_OPERAND (exp, 0), NULL_RTX, if_true_label); | |
10417 | start_cleanup_deferral (); | |
10418 | do_jump (TREE_OPERAND (exp, 1), if_false_label, if_true_label); | |
10419 | end_cleanup_deferral (); | |
10420 | break; | |
bbf6f052 | 10421 | |
b93a436e JL |
10422 | case COMPOUND_EXPR: |
10423 | push_temp_slots (); | |
10424 | expand_expr (TREE_OPERAND (exp, 0), const0_rtx, VOIDmode, 0); | |
10425 | preserve_temp_slots (NULL_RTX); | |
10426 | free_temp_slots (); | |
10427 | pop_temp_slots (); | |
10428 | emit_queue (); | |
10429 | do_pending_stack_adjust (); | |
10430 | do_jump (TREE_OPERAND (exp, 1), if_false_label, if_true_label); | |
10431 | break; | |
bbf6f052 | 10432 | |
b93a436e JL |
10433 | case COMPONENT_REF: |
10434 | case BIT_FIELD_REF: | |
10435 | case ARRAY_REF: | |
10436 | { | |
10437 | int bitsize, bitpos, unsignedp; | |
10438 | enum machine_mode mode; | |
10439 | tree type; | |
10440 | tree offset; | |
10441 | int volatilep = 0; | |
10442 | int alignment; | |
bbf6f052 | 10443 | |
b93a436e JL |
10444 | /* Get description of this reference. We don't actually care |
10445 | about the underlying object here. */ | |
10446 | get_inner_reference (exp, &bitsize, &bitpos, &offset, | |
10447 | &mode, &unsignedp, &volatilep, | |
10448 | &alignment); | |
bbf6f052 | 10449 | |
b93a436e JL |
10450 | type = type_for_size (bitsize, unsignedp); |
10451 | if (! SLOW_BYTE_ACCESS | |
10452 | && type != 0 && bitsize >= 0 | |
10453 | && TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (exp)) | |
10454 | && (cmp_optab->handlers[(int) TYPE_MODE (type)].insn_code | |
10455 | != CODE_FOR_nothing)) | |
10456 | { | |
10457 | do_jump (convert (type, exp), if_false_label, if_true_label); | |
10458 | break; | |
10459 | } | |
10460 | goto normal; | |
10461 | } | |
bbf6f052 | 10462 | |
b93a436e JL |
10463 | case COND_EXPR: |
10464 | /* Do (a ? 1 : 0) and (a ? 0 : 1) as special cases. */ | |
10465 | if (integer_onep (TREE_OPERAND (exp, 1)) | |
10466 | && integer_zerop (TREE_OPERAND (exp, 2))) | |
10467 | do_jump (TREE_OPERAND (exp, 0), if_false_label, if_true_label); | |
bbf6f052 | 10468 | |
b93a436e JL |
10469 | else if (integer_zerop (TREE_OPERAND (exp, 1)) |
10470 | && integer_onep (TREE_OPERAND (exp, 2))) | |
10471 | do_jump (TREE_OPERAND (exp, 0), if_true_label, if_false_label); | |
bbf6f052 | 10472 | |
b93a436e JL |
10473 | else |
10474 | { | |
10475 | register rtx label1 = gen_label_rtx (); | |
10476 | drop_through_label = gen_label_rtx (); | |
bbf6f052 | 10477 | |
b93a436e | 10478 | do_jump (TREE_OPERAND (exp, 0), label1, NULL_RTX); |
bbf6f052 | 10479 | |
b93a436e JL |
10480 | start_cleanup_deferral (); |
10481 | /* Now the THEN-expression. */ | |
10482 | do_jump (TREE_OPERAND (exp, 1), | |
10483 | if_false_label ? if_false_label : drop_through_label, | |
10484 | if_true_label ? if_true_label : drop_through_label); | |
10485 | /* In case the do_jump just above never jumps. */ | |
10486 | do_pending_stack_adjust (); | |
10487 | emit_label (label1); | |
bbf6f052 | 10488 | |
b93a436e JL |
10489 | /* Now the ELSE-expression. */ |
10490 | do_jump (TREE_OPERAND (exp, 2), | |
10491 | if_false_label ? if_false_label : drop_through_label, | |
10492 | if_true_label ? if_true_label : drop_through_label); | |
10493 | end_cleanup_deferral (); | |
10494 | } | |
10495 | break; | |
bbf6f052 | 10496 | |
b93a436e JL |
10497 | case EQ_EXPR: |
10498 | { | |
10499 | tree inner_type = TREE_TYPE (TREE_OPERAND (exp, 0)); | |
bbf6f052 | 10500 | |
9ec36da5 JL |
10501 | if (GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_COMPLEX_FLOAT |
10502 | || GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_COMPLEX_INT) | |
8d62b411 AS |
10503 | { |
10504 | tree exp0 = save_expr (TREE_OPERAND (exp, 0)); | |
10505 | tree exp1 = save_expr (TREE_OPERAND (exp, 1)); | |
10506 | do_jump | |
10507 | (fold | |
10508 | (build (TRUTH_ANDIF_EXPR, TREE_TYPE (exp), | |
10509 | fold (build (EQ_EXPR, TREE_TYPE (exp), | |
10510 | fold (build1 (REALPART_EXPR, | |
10511 | TREE_TYPE (inner_type), | |
10512 | exp0)), | |
10513 | fold (build1 (REALPART_EXPR, | |
10514 | TREE_TYPE (inner_type), | |
10515 | exp1)))), | |
10516 | fold (build (EQ_EXPR, TREE_TYPE (exp), | |
10517 | fold (build1 (IMAGPART_EXPR, | |
10518 | TREE_TYPE (inner_type), | |
10519 | exp0)), | |
10520 | fold (build1 (IMAGPART_EXPR, | |
10521 | TREE_TYPE (inner_type), | |
10522 | exp1)))))), | |
10523 | if_false_label, if_true_label); | |
10524 | } | |
9ec36da5 JL |
10525 | |
10526 | else if (integer_zerop (TREE_OPERAND (exp, 1))) | |
10527 | do_jump (TREE_OPERAND (exp, 0), if_true_label, if_false_label); | |
10528 | ||
b93a436e JL |
10529 | else if (GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_INT |
10530 | && !can_compare_p (TYPE_MODE (inner_type))) | |
10531 | do_jump_by_parts_equality (exp, if_false_label, if_true_label); | |
10532 | else | |
10533 | comparison = compare (exp, EQ, EQ); | |
10534 | break; | |
10535 | } | |
bbf6f052 | 10536 | |
b93a436e JL |
10537 | case NE_EXPR: |
10538 | { | |
10539 | tree inner_type = TREE_TYPE (TREE_OPERAND (exp, 0)); | |
bbf6f052 | 10540 | |
9ec36da5 JL |
10541 | if (GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_COMPLEX_FLOAT |
10542 | || GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_COMPLEX_INT) | |
8d62b411 AS |
10543 | { |
10544 | tree exp0 = save_expr (TREE_OPERAND (exp, 0)); | |
10545 | tree exp1 = save_expr (TREE_OPERAND (exp, 1)); | |
10546 | do_jump | |
10547 | (fold | |
10548 | (build (TRUTH_ORIF_EXPR, TREE_TYPE (exp), | |
10549 | fold (build (NE_EXPR, TREE_TYPE (exp), | |
10550 | fold (build1 (REALPART_EXPR, | |
10551 | TREE_TYPE (inner_type), | |
10552 | exp0)), | |
10553 | fold (build1 (REALPART_EXPR, | |
10554 | TREE_TYPE (inner_type), | |
10555 | exp1)))), | |
10556 | fold (build (NE_EXPR, TREE_TYPE (exp), | |
10557 | fold (build1 (IMAGPART_EXPR, | |
10558 | TREE_TYPE (inner_type), | |
10559 | exp0)), | |
10560 | fold (build1 (IMAGPART_EXPR, | |
10561 | TREE_TYPE (inner_type), | |
10562 | exp1)))))), | |
10563 | if_false_label, if_true_label); | |
10564 | } | |
9ec36da5 JL |
10565 | |
10566 | else if (integer_zerop (TREE_OPERAND (exp, 1))) | |
10567 | do_jump (TREE_OPERAND (exp, 0), if_false_label, if_true_label); | |
10568 | ||
b93a436e JL |
10569 | else if (GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_INT |
10570 | && !can_compare_p (TYPE_MODE (inner_type))) | |
10571 | do_jump_by_parts_equality (exp, if_true_label, if_false_label); | |
10572 | else | |
10573 | comparison = compare (exp, NE, NE); | |
10574 | break; | |
10575 | } | |
bbf6f052 | 10576 | |
b93a436e JL |
10577 | case LT_EXPR: |
10578 | if ((GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0)))) | |
10579 | == MODE_INT) | |
10580 | && !can_compare_p (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))))) | |
10581 | do_jump_by_parts_greater (exp, 1, if_false_label, if_true_label); | |
10582 | else | |
10583 | comparison = compare (exp, LT, LTU); | |
10584 | break; | |
bbf6f052 | 10585 | |
b93a436e JL |
10586 | case LE_EXPR: |
10587 | if ((GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0)))) | |
10588 | == MODE_INT) | |
10589 | && !can_compare_p (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))))) | |
10590 | do_jump_by_parts_greater (exp, 0, if_true_label, if_false_label); | |
10591 | else | |
10592 | comparison = compare (exp, LE, LEU); | |
10593 | break; | |
bbf6f052 | 10594 | |
b93a436e JL |
10595 | case GT_EXPR: |
10596 | if ((GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0)))) | |
10597 | == MODE_INT) | |
10598 | && !can_compare_p (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))))) | |
10599 | do_jump_by_parts_greater (exp, 0, if_false_label, if_true_label); | |
10600 | else | |
10601 | comparison = compare (exp, GT, GTU); | |
10602 | break; | |
bbf6f052 | 10603 | |
b93a436e JL |
10604 | case GE_EXPR: |
10605 | if ((GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0)))) | |
10606 | == MODE_INT) | |
10607 | && !can_compare_p (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))))) | |
10608 | do_jump_by_parts_greater (exp, 1, if_true_label, if_false_label); | |
10609 | else | |
10610 | comparison = compare (exp, GE, GEU); | |
10611 | break; | |
bbf6f052 | 10612 | |
b93a436e JL |
10613 | default: |
10614 | normal: | |
10615 | temp = expand_expr (exp, NULL_RTX, VOIDmode, 0); | |
10616 | #if 0 | |
10617 | /* This is not needed any more and causes poor code since it causes | |
10618 | comparisons and tests from non-SI objects to have different code | |
10619 | sequences. */ | |
10620 | /* Copy to register to avoid generating bad insns by cse | |
10621 | from (set (mem ...) (arithop)) (set (cc0) (mem ...)). */ | |
10622 | if (!cse_not_expected && GET_CODE (temp) == MEM) | |
10623 | temp = copy_to_reg (temp); | |
ca695ac9 | 10624 | #endif |
b93a436e JL |
10625 | do_pending_stack_adjust (); |
10626 | if (GET_CODE (temp) == CONST_INT) | |
10627 | comparison = (temp == const0_rtx ? const0_rtx : const_true_rtx); | |
10628 | else if (GET_CODE (temp) == LABEL_REF) | |
10629 | comparison = const_true_rtx; | |
10630 | else if (GET_MODE_CLASS (GET_MODE (temp)) == MODE_INT | |
10631 | && !can_compare_p (GET_MODE (temp))) | |
10632 | /* Note swapping the labels gives us not-equal. */ | |
10633 | do_jump_by_parts_equality_rtx (temp, if_true_label, if_false_label); | |
10634 | else if (GET_MODE (temp) != VOIDmode) | |
10635 | comparison = compare_from_rtx (temp, CONST0_RTX (GET_MODE (temp)), | |
10636 | NE, TREE_UNSIGNED (TREE_TYPE (exp)), | |
10637 | GET_MODE (temp), NULL_RTX, 0); | |
10638 | else | |
10639 | abort (); | |
10640 | } | |
bbf6f052 | 10641 | |
b93a436e JL |
10642 | /* Do any postincrements in the expression that was tested. */ |
10643 | emit_queue (); | |
bbf6f052 | 10644 | |
b93a436e JL |
10645 | /* If COMPARISON is nonzero here, it is an rtx that can be substituted |
10646 | straight into a conditional jump instruction as the jump condition. | |
10647 | Otherwise, all the work has been done already. */ | |
bbf6f052 | 10648 | |
b93a436e JL |
10649 | if (comparison == const_true_rtx) |
10650 | { | |
10651 | if (if_true_label) | |
10652 | emit_jump (if_true_label); | |
10653 | } | |
10654 | else if (comparison == const0_rtx) | |
10655 | { | |
10656 | if (if_false_label) | |
10657 | emit_jump (if_false_label); | |
10658 | } | |
10659 | else if (comparison) | |
10660 | do_jump_for_compare (comparison, if_false_label, if_true_label); | |
bbf6f052 | 10661 | |
b93a436e JL |
10662 | if (drop_through_label) |
10663 | { | |
10664 | /* If do_jump produces code that might be jumped around, | |
10665 | do any stack adjusts from that code, before the place | |
10666 | where control merges in. */ | |
10667 | do_pending_stack_adjust (); | |
10668 | emit_label (drop_through_label); | |
10669 | } | |
bbf6f052 | 10670 | } |
b93a436e JL |
10671 | \f |
10672 | /* Given a comparison expression EXP for values too wide to be compared | |
10673 | with one insn, test the comparison and jump to the appropriate label. | |
10674 | The code of EXP is ignored; we always test GT if SWAP is 0, | |
10675 | and LT if SWAP is 1. */ | |
bbf6f052 | 10676 | |
b93a436e JL |
10677 | static void |
10678 | do_jump_by_parts_greater (exp, swap, if_false_label, if_true_label) | |
10679 | tree exp; | |
10680 | int swap; | |
10681 | rtx if_false_label, if_true_label; | |
10682 | { | |
10683 | rtx op0 = expand_expr (TREE_OPERAND (exp, swap), NULL_RTX, VOIDmode, 0); | |
10684 | rtx op1 = expand_expr (TREE_OPERAND (exp, !swap), NULL_RTX, VOIDmode, 0); | |
10685 | enum machine_mode mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
10686 | int nwords = (GET_MODE_SIZE (mode) / UNITS_PER_WORD); | |
10687 | rtx drop_through_label = 0; | |
10688 | int unsignedp = TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
10689 | int i; | |
bbf6f052 | 10690 | |
b93a436e JL |
10691 | if (! if_true_label || ! if_false_label) |
10692 | drop_through_label = gen_label_rtx (); | |
10693 | if (! if_true_label) | |
10694 | if_true_label = drop_through_label; | |
10695 | if (! if_false_label) | |
10696 | if_false_label = drop_through_label; | |
bbf6f052 | 10697 | |
b93a436e JL |
10698 | /* Compare a word at a time, high order first. */ |
10699 | for (i = 0; i < nwords; i++) | |
f81497d9 | 10700 | { |
b93a436e JL |
10701 | rtx comp; |
10702 | rtx op0_word, op1_word; | |
10703 | ||
10704 | if (WORDS_BIG_ENDIAN) | |
10705 | { | |
10706 | op0_word = operand_subword_force (op0, i, mode); | |
10707 | op1_word = operand_subword_force (op1, i, mode); | |
10708 | } | |
f81497d9 | 10709 | else |
b93a436e JL |
10710 | { |
10711 | op0_word = operand_subword_force (op0, nwords - 1 - i, mode); | |
10712 | op1_word = operand_subword_force (op1, nwords - 1 - i, mode); | |
10713 | } | |
10714 | ||
10715 | /* All but high-order word must be compared as unsigned. */ | |
10716 | comp = compare_from_rtx (op0_word, op1_word, | |
10717 | (unsignedp || i > 0) ? GTU : GT, | |
10718 | unsignedp, word_mode, NULL_RTX, 0); | |
10719 | if (comp == const_true_rtx) | |
10720 | emit_jump (if_true_label); | |
10721 | else if (comp != const0_rtx) | |
10722 | do_jump_for_compare (comp, NULL_RTX, if_true_label); | |
10723 | ||
10724 | /* Consider lower words only if these are equal. */ | |
10725 | comp = compare_from_rtx (op0_word, op1_word, NE, unsignedp, word_mode, | |
10726 | NULL_RTX, 0); | |
10727 | if (comp == const_true_rtx) | |
10728 | emit_jump (if_false_label); | |
10729 | else if (comp != const0_rtx) | |
10730 | do_jump_for_compare (comp, NULL_RTX, if_false_label); | |
f81497d9 | 10731 | } |
ca695ac9 | 10732 | |
b93a436e JL |
10733 | if (if_false_label) |
10734 | emit_jump (if_false_label); | |
10735 | if (drop_through_label) | |
10736 | emit_label (drop_through_label); | |
f81497d9 RS |
10737 | } |
10738 | ||
b93a436e JL |
10739 | /* Compare OP0 with OP1, word at a time, in mode MODE. |
10740 | UNSIGNEDP says to do unsigned comparison. | |
10741 | Jump to IF_TRUE_LABEL if OP0 is greater, IF_FALSE_LABEL otherwise. */ | |
f81497d9 | 10742 | |
b93a436e JL |
10743 | void |
10744 | do_jump_by_parts_greater_rtx (mode, unsignedp, op0, op1, if_false_label, if_true_label) | |
10745 | enum machine_mode mode; | |
10746 | int unsignedp; | |
10747 | rtx op0, op1; | |
10748 | rtx if_false_label, if_true_label; | |
f81497d9 | 10749 | { |
b93a436e JL |
10750 | int nwords = (GET_MODE_SIZE (mode) / UNITS_PER_WORD); |
10751 | rtx drop_through_label = 0; | |
10752 | int i; | |
f81497d9 | 10753 | |
b93a436e JL |
10754 | if (! if_true_label || ! if_false_label) |
10755 | drop_through_label = gen_label_rtx (); | |
10756 | if (! if_true_label) | |
10757 | if_true_label = drop_through_label; | |
10758 | if (! if_false_label) | |
10759 | if_false_label = drop_through_label; | |
f81497d9 | 10760 | |
b93a436e JL |
10761 | /* Compare a word at a time, high order first. */ |
10762 | for (i = 0; i < nwords; i++) | |
10763 | { | |
10764 | rtx comp; | |
10765 | rtx op0_word, op1_word; | |
bbf6f052 | 10766 | |
b93a436e JL |
10767 | if (WORDS_BIG_ENDIAN) |
10768 | { | |
10769 | op0_word = operand_subword_force (op0, i, mode); | |
10770 | op1_word = operand_subword_force (op1, i, mode); | |
10771 | } | |
10772 | else | |
10773 | { | |
10774 | op0_word = operand_subword_force (op0, nwords - 1 - i, mode); | |
10775 | op1_word = operand_subword_force (op1, nwords - 1 - i, mode); | |
10776 | } | |
bbf6f052 | 10777 | |
b93a436e JL |
10778 | /* All but high-order word must be compared as unsigned. */ |
10779 | comp = compare_from_rtx (op0_word, op1_word, | |
10780 | (unsignedp || i > 0) ? GTU : GT, | |
10781 | unsignedp, word_mode, NULL_RTX, 0); | |
10782 | if (comp == const_true_rtx) | |
10783 | emit_jump (if_true_label); | |
10784 | else if (comp != const0_rtx) | |
10785 | do_jump_for_compare (comp, NULL_RTX, if_true_label); | |
bbf6f052 | 10786 | |
b93a436e JL |
10787 | /* Consider lower words only if these are equal. */ |
10788 | comp = compare_from_rtx (op0_word, op1_word, NE, unsignedp, word_mode, | |
10789 | NULL_RTX, 0); | |
10790 | if (comp == const_true_rtx) | |
10791 | emit_jump (if_false_label); | |
10792 | else if (comp != const0_rtx) | |
10793 | do_jump_for_compare (comp, NULL_RTX, if_false_label); | |
10794 | } | |
bbf6f052 | 10795 | |
b93a436e JL |
10796 | if (if_false_label) |
10797 | emit_jump (if_false_label); | |
10798 | if (drop_through_label) | |
10799 | emit_label (drop_through_label); | |
bbf6f052 RK |
10800 | } |
10801 | ||
b93a436e JL |
10802 | /* Given an EQ_EXPR expression EXP for values too wide to be compared |
10803 | with one insn, test the comparison and jump to the appropriate label. */ | |
bbf6f052 | 10804 | |
b93a436e JL |
10805 | static void |
10806 | do_jump_by_parts_equality (exp, if_false_label, if_true_label) | |
10807 | tree exp; | |
10808 | rtx if_false_label, if_true_label; | |
bbf6f052 | 10809 | { |
b93a436e JL |
10810 | rtx op0 = expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, VOIDmode, 0); |
10811 | rtx op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); | |
10812 | enum machine_mode mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
10813 | int nwords = (GET_MODE_SIZE (mode) / UNITS_PER_WORD); | |
10814 | int i; | |
10815 | rtx drop_through_label = 0; | |
bbf6f052 | 10816 | |
b93a436e JL |
10817 | if (! if_false_label) |
10818 | drop_through_label = if_false_label = gen_label_rtx (); | |
bbf6f052 | 10819 | |
b93a436e JL |
10820 | for (i = 0; i < nwords; i++) |
10821 | { | |
10822 | rtx comp = compare_from_rtx (operand_subword_force (op0, i, mode), | |
10823 | operand_subword_force (op1, i, mode), | |
10824 | EQ, TREE_UNSIGNED (TREE_TYPE (exp)), | |
10825 | word_mode, NULL_RTX, 0); | |
10826 | if (comp == const_true_rtx) | |
10827 | emit_jump (if_false_label); | |
10828 | else if (comp != const0_rtx) | |
10829 | do_jump_for_compare (comp, if_false_label, NULL_RTX); | |
10830 | } | |
bbf6f052 | 10831 | |
b93a436e JL |
10832 | if (if_true_label) |
10833 | emit_jump (if_true_label); | |
10834 | if (drop_through_label) | |
10835 | emit_label (drop_through_label); | |
bbf6f052 | 10836 | } |
b93a436e JL |
10837 | \f |
10838 | /* Jump according to whether OP0 is 0. | |
10839 | We assume that OP0 has an integer mode that is too wide | |
10840 | for the available compare insns. */ | |
bbf6f052 | 10841 | |
f5963e61 | 10842 | void |
b93a436e JL |
10843 | do_jump_by_parts_equality_rtx (op0, if_false_label, if_true_label) |
10844 | rtx op0; | |
10845 | rtx if_false_label, if_true_label; | |
ca695ac9 | 10846 | { |
b93a436e JL |
10847 | int nwords = GET_MODE_SIZE (GET_MODE (op0)) / UNITS_PER_WORD; |
10848 | rtx part; | |
10849 | int i; | |
10850 | rtx drop_through_label = 0; | |
bbf6f052 | 10851 | |
b93a436e JL |
10852 | /* The fastest way of doing this comparison on almost any machine is to |
10853 | "or" all the words and compare the result. If all have to be loaded | |
10854 | from memory and this is a very wide item, it's possible this may | |
10855 | be slower, but that's highly unlikely. */ | |
bbf6f052 | 10856 | |
b93a436e JL |
10857 | part = gen_reg_rtx (word_mode); |
10858 | emit_move_insn (part, operand_subword_force (op0, 0, GET_MODE (op0))); | |
10859 | for (i = 1; i < nwords && part != 0; i++) | |
10860 | part = expand_binop (word_mode, ior_optab, part, | |
10861 | operand_subword_force (op0, i, GET_MODE (op0)), | |
10862 | part, 1, OPTAB_WIDEN); | |
bbf6f052 | 10863 | |
b93a436e JL |
10864 | if (part != 0) |
10865 | { | |
10866 | rtx comp = compare_from_rtx (part, const0_rtx, EQ, 1, word_mode, | |
10867 | NULL_RTX, 0); | |
0f41302f | 10868 | |
b93a436e JL |
10869 | if (comp == const_true_rtx) |
10870 | emit_jump (if_false_label); | |
10871 | else if (comp == const0_rtx) | |
10872 | emit_jump (if_true_label); | |
10873 | else | |
10874 | do_jump_for_compare (comp, if_false_label, if_true_label); | |
bbf6f052 | 10875 | |
b93a436e JL |
10876 | return; |
10877 | } | |
bbf6f052 | 10878 | |
b93a436e JL |
10879 | /* If we couldn't do the "or" simply, do this with a series of compares. */ |
10880 | if (! if_false_label) | |
10881 | drop_through_label = if_false_label = gen_label_rtx (); | |
bbf6f052 | 10882 | |
b93a436e JL |
10883 | for (i = 0; i < nwords; i++) |
10884 | { | |
10885 | rtx comp = compare_from_rtx (operand_subword_force (op0, i, | |
10886 | GET_MODE (op0)), | |
10887 | const0_rtx, EQ, 1, word_mode, NULL_RTX, 0); | |
10888 | if (comp == const_true_rtx) | |
10889 | emit_jump (if_false_label); | |
10890 | else if (comp != const0_rtx) | |
10891 | do_jump_for_compare (comp, if_false_label, NULL_RTX); | |
10892 | } | |
bbf6f052 | 10893 | |
b93a436e JL |
10894 | if (if_true_label) |
10895 | emit_jump (if_true_label); | |
0f41302f | 10896 | |
b93a436e JL |
10897 | if (drop_through_label) |
10898 | emit_label (drop_through_label); | |
bbf6f052 | 10899 | } |
bbf6f052 | 10900 | |
b93a436e JL |
10901 | /* Given a comparison expression in rtl form, output conditional branches to |
10902 | IF_TRUE_LABEL, IF_FALSE_LABEL, or both. */ | |
bbf6f052 | 10903 | |
b93a436e JL |
10904 | static void |
10905 | do_jump_for_compare (comparison, if_false_label, if_true_label) | |
10906 | rtx comparison, if_false_label, if_true_label; | |
bbf6f052 | 10907 | { |
b93a436e JL |
10908 | if (if_true_label) |
10909 | { | |
10910 | if (bcc_gen_fctn[(int) GET_CODE (comparison)] != 0) | |
10911 | emit_jump_insn ((*bcc_gen_fctn[(int) GET_CODE (comparison)]) (if_true_label)); | |
10912 | else | |
10913 | abort (); | |
ca695ac9 | 10914 | |
b93a436e JL |
10915 | if (if_false_label) |
10916 | emit_jump (if_false_label); | |
10917 | } | |
10918 | else if (if_false_label) | |
10919 | { | |
10920 | rtx insn; | |
10921 | rtx prev = get_last_insn (); | |
10922 | rtx branch = 0; | |
0f41302f | 10923 | |
b93a436e JL |
10924 | /* Output the branch with the opposite condition. Then try to invert |
10925 | what is generated. If more than one insn is a branch, or if the | |
10926 | branch is not the last insn written, abort. If we can't invert | |
10927 | the branch, emit make a true label, redirect this jump to that, | |
10928 | emit a jump to the false label and define the true label. */ | |
bbf6f052 | 10929 | |
b93a436e JL |
10930 | if (bcc_gen_fctn[(int) GET_CODE (comparison)] != 0) |
10931 | emit_jump_insn ((*bcc_gen_fctn[(int) GET_CODE (comparison)])(if_false_label)); | |
10932 | else | |
10933 | abort (); | |
bbf6f052 | 10934 | |
b93a436e JL |
10935 | /* Here we get the first insn that was just emitted. It used to be the |
10936 | case that, on some machines, emitting the branch would discard | |
10937 | the previous compare insn and emit a replacement. This isn't | |
10938 | done anymore, but abort if we see that PREV is deleted. */ | |
bbf6f052 | 10939 | |
b93a436e JL |
10940 | if (prev == 0) |
10941 | insn = get_insns (); | |
10942 | else if (INSN_DELETED_P (prev)) | |
10943 | abort (); | |
10944 | else | |
10945 | insn = NEXT_INSN (prev); | |
bbf6f052 | 10946 | |
b93a436e JL |
10947 | for (; insn; insn = NEXT_INSN (insn)) |
10948 | if (GET_CODE (insn) == JUMP_INSN) | |
10949 | { | |
10950 | if (branch) | |
10951 | abort (); | |
10952 | branch = insn; | |
10953 | } | |
a7c5971a | 10954 | |
b93a436e JL |
10955 | if (branch != get_last_insn ()) |
10956 | abort (); | |
bbf6f052 | 10957 | |
b93a436e JL |
10958 | JUMP_LABEL (branch) = if_false_label; |
10959 | if (! invert_jump (branch, if_false_label)) | |
10960 | { | |
10961 | if_true_label = gen_label_rtx (); | |
10962 | redirect_jump (branch, if_true_label); | |
10963 | emit_jump (if_false_label); | |
10964 | emit_label (if_true_label); | |
10965 | } | |
10966 | } | |
10967 | } | |
10968 | \f | |
10969 | /* Generate code for a comparison expression EXP | |
10970 | (including code to compute the values to be compared) | |
10971 | and set (CC0) according to the result. | |
10972 | SIGNED_CODE should be the rtx operation for this comparison for | |
10973 | signed data; UNSIGNED_CODE, likewise for use if data is unsigned. | |
bbf6f052 | 10974 | |
b93a436e JL |
10975 | We force a stack adjustment unless there are currently |
10976 | things pushed on the stack that aren't yet used. */ | |
ca695ac9 | 10977 | |
b93a436e JL |
10978 | static rtx |
10979 | compare (exp, signed_code, unsigned_code) | |
10980 | register tree exp; | |
10981 | enum rtx_code signed_code, unsigned_code; | |
10982 | { | |
10983 | register rtx op0 | |
10984 | = expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, VOIDmode, 0); | |
10985 | register rtx op1 | |
10986 | = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); | |
10987 | register tree type = TREE_TYPE (TREE_OPERAND (exp, 0)); | |
10988 | register enum machine_mode mode = TYPE_MODE (type); | |
10989 | int unsignedp = TREE_UNSIGNED (type); | |
10990 | enum rtx_code code = unsignedp ? unsigned_code : signed_code; | |
ca695ac9 | 10991 | |
b93a436e JL |
10992 | #ifdef HAVE_canonicalize_funcptr_for_compare |
10993 | /* If function pointers need to be "canonicalized" before they can | |
10994 | be reliably compared, then canonicalize them. */ | |
10995 | if (HAVE_canonicalize_funcptr_for_compare | |
10996 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) == POINTER_TYPE | |
10997 | && (TREE_CODE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 0)))) | |
10998 | == FUNCTION_TYPE)) | |
bbf6f052 | 10999 | { |
b93a436e | 11000 | rtx new_op0 = gen_reg_rtx (mode); |
bbf6f052 | 11001 | |
b93a436e JL |
11002 | emit_insn (gen_canonicalize_funcptr_for_compare (new_op0, op0)); |
11003 | op0 = new_op0; | |
ca695ac9 | 11004 | } |
bbf6f052 | 11005 | |
b93a436e JL |
11006 | if (HAVE_canonicalize_funcptr_for_compare |
11007 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 1))) == POINTER_TYPE | |
11008 | && (TREE_CODE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 1)))) | |
11009 | == FUNCTION_TYPE)) | |
11010 | { | |
11011 | rtx new_op1 = gen_reg_rtx (mode); | |
bbf6f052 | 11012 | |
b93a436e JL |
11013 | emit_insn (gen_canonicalize_funcptr_for_compare (new_op1, op1)); |
11014 | op1 = new_op1; | |
11015 | } | |
11016 | #endif | |
0f41302f | 11017 | |
b93a436e JL |
11018 | return compare_from_rtx (op0, op1, code, unsignedp, mode, |
11019 | ((mode == BLKmode) | |
11020 | ? expr_size (TREE_OPERAND (exp, 0)) : NULL_RTX), | |
11021 | TYPE_ALIGN (TREE_TYPE (exp)) / BITS_PER_UNIT); | |
ca695ac9 | 11022 | } |
bbf6f052 | 11023 | |
b93a436e JL |
11024 | /* Like compare but expects the values to compare as two rtx's. |
11025 | The decision as to signed or unsigned comparison must be made by the caller. | |
bbf6f052 | 11026 | |
b93a436e JL |
11027 | If MODE is BLKmode, SIZE is an RTX giving the size of the objects being |
11028 | compared. | |
bbf6f052 | 11029 | |
b93a436e JL |
11030 | If ALIGN is non-zero, it is the alignment of this type; if zero, the |
11031 | size of MODE should be used. */ | |
ca695ac9 | 11032 | |
b93a436e JL |
11033 | rtx |
11034 | compare_from_rtx (op0, op1, code, unsignedp, mode, size, align) | |
11035 | register rtx op0, op1; | |
11036 | enum rtx_code code; | |
11037 | int unsignedp; | |
11038 | enum machine_mode mode; | |
11039 | rtx size; | |
11040 | int align; | |
bbf6f052 | 11041 | { |
b93a436e | 11042 | rtx tem; |
bbf6f052 | 11043 | |
b93a436e JL |
11044 | /* If one operand is constant, make it the second one. Only do this |
11045 | if the other operand is not constant as well. */ | |
e7c33f54 | 11046 | |
b93a436e JL |
11047 | if ((CONSTANT_P (op0) && ! CONSTANT_P (op1)) |
11048 | || (GET_CODE (op0) == CONST_INT && GET_CODE (op1) != CONST_INT)) | |
ca695ac9 | 11049 | { |
b93a436e JL |
11050 | tem = op0; |
11051 | op0 = op1; | |
11052 | op1 = tem; | |
11053 | code = swap_condition (code); | |
11054 | } | |
bbf6f052 | 11055 | |
b93a436e JL |
11056 | if (flag_force_mem) |
11057 | { | |
11058 | op0 = force_not_mem (op0); | |
11059 | op1 = force_not_mem (op1); | |
11060 | } | |
bbf6f052 | 11061 | |
b93a436e | 11062 | do_pending_stack_adjust (); |
ca695ac9 | 11063 | |
b93a436e JL |
11064 | if (GET_CODE (op0) == CONST_INT && GET_CODE (op1) == CONST_INT |
11065 | && (tem = simplify_relational_operation (code, mode, op0, op1)) != 0) | |
11066 | return tem; | |
ca695ac9 | 11067 | |
b93a436e JL |
11068 | #if 0 |
11069 | /* There's no need to do this now that combine.c can eliminate lots of | |
11070 | sign extensions. This can be less efficient in certain cases on other | |
11071 | machines. */ | |
ca695ac9 | 11072 | |
b93a436e JL |
11073 | /* If this is a signed equality comparison, we can do it as an |
11074 | unsigned comparison since zero-extension is cheaper than sign | |
11075 | extension and comparisons with zero are done as unsigned. This is | |
11076 | the case even on machines that can do fast sign extension, since | |
11077 | zero-extension is easier to combine with other operations than | |
11078 | sign-extension is. If we are comparing against a constant, we must | |
11079 | convert it to what it would look like unsigned. */ | |
11080 | if ((code == EQ || code == NE) && ! unsignedp | |
11081 | && GET_MODE_BITSIZE (GET_MODE (op0)) <= HOST_BITS_PER_WIDE_INT) | |
11082 | { | |
11083 | if (GET_CODE (op1) == CONST_INT | |
11084 | && (INTVAL (op1) & GET_MODE_MASK (GET_MODE (op0))) != INTVAL (op1)) | |
11085 | op1 = GEN_INT (INTVAL (op1) & GET_MODE_MASK (GET_MODE (op0))); | |
11086 | unsignedp = 1; | |
11087 | } | |
11088 | #endif | |
ca695ac9 | 11089 | |
b93a436e | 11090 | emit_cmp_insn (op0, op1, code, size, mode, unsignedp, align); |
ca695ac9 | 11091 | |
b93a436e JL |
11092 | return gen_rtx_fmt_ee (code, VOIDmode, cc0_rtx, const0_rtx); |
11093 | } | |
11094 | \f | |
11095 | /* Generate code to calculate EXP using a store-flag instruction | |
11096 | and return an rtx for the result. EXP is either a comparison | |
11097 | or a TRUTH_NOT_EXPR whose operand is a comparison. | |
ca695ac9 | 11098 | |
b93a436e | 11099 | If TARGET is nonzero, store the result there if convenient. |
ca695ac9 | 11100 | |
b93a436e JL |
11101 | If ONLY_CHEAP is non-zero, only do this if it is likely to be very |
11102 | cheap. | |
ca695ac9 | 11103 | |
b93a436e JL |
11104 | Return zero if there is no suitable set-flag instruction |
11105 | available on this machine. | |
ca695ac9 | 11106 | |
b93a436e JL |
11107 | Once expand_expr has been called on the arguments of the comparison, |
11108 | we are committed to doing the store flag, since it is not safe to | |
11109 | re-evaluate the expression. We emit the store-flag insn by calling | |
11110 | emit_store_flag, but only expand the arguments if we have a reason | |
11111 | to believe that emit_store_flag will be successful. If we think that | |
11112 | it will, but it isn't, we have to simulate the store-flag with a | |
11113 | set/jump/set sequence. */ | |
ca695ac9 | 11114 | |
b93a436e JL |
11115 | static rtx |
11116 | do_store_flag (exp, target, mode, only_cheap) | |
11117 | tree exp; | |
11118 | rtx target; | |
11119 | enum machine_mode mode; | |
11120 | int only_cheap; | |
11121 | { | |
11122 | enum rtx_code code; | |
11123 | tree arg0, arg1, type; | |
11124 | tree tem; | |
11125 | enum machine_mode operand_mode; | |
11126 | int invert = 0; | |
11127 | int unsignedp; | |
11128 | rtx op0, op1; | |
11129 | enum insn_code icode; | |
11130 | rtx subtarget = target; | |
381127e8 | 11131 | rtx result, label; |
ca695ac9 | 11132 | |
b93a436e JL |
11133 | /* If this is a TRUTH_NOT_EXPR, set a flag indicating we must invert the |
11134 | result at the end. We can't simply invert the test since it would | |
11135 | have already been inverted if it were valid. This case occurs for | |
11136 | some floating-point comparisons. */ | |
ca695ac9 | 11137 | |
b93a436e JL |
11138 | if (TREE_CODE (exp) == TRUTH_NOT_EXPR) |
11139 | invert = 1, exp = TREE_OPERAND (exp, 0); | |
ca695ac9 | 11140 | |
b93a436e JL |
11141 | arg0 = TREE_OPERAND (exp, 0); |
11142 | arg1 = TREE_OPERAND (exp, 1); | |
11143 | type = TREE_TYPE (arg0); | |
11144 | operand_mode = TYPE_MODE (type); | |
11145 | unsignedp = TREE_UNSIGNED (type); | |
ca695ac9 | 11146 | |
b93a436e JL |
11147 | /* We won't bother with BLKmode store-flag operations because it would mean |
11148 | passing a lot of information to emit_store_flag. */ | |
11149 | if (operand_mode == BLKmode) | |
11150 | return 0; | |
ca695ac9 | 11151 | |
b93a436e JL |
11152 | /* We won't bother with store-flag operations involving function pointers |
11153 | when function pointers must be canonicalized before comparisons. */ | |
11154 | #ifdef HAVE_canonicalize_funcptr_for_compare | |
11155 | if (HAVE_canonicalize_funcptr_for_compare | |
11156 | && ((TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) == POINTER_TYPE | |
11157 | && (TREE_CODE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 0)))) | |
11158 | == FUNCTION_TYPE)) | |
11159 | || (TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 1))) == POINTER_TYPE | |
11160 | && (TREE_CODE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 1)))) | |
11161 | == FUNCTION_TYPE)))) | |
11162 | return 0; | |
ca695ac9 JB |
11163 | #endif |
11164 | ||
b93a436e JL |
11165 | STRIP_NOPS (arg0); |
11166 | STRIP_NOPS (arg1); | |
ca695ac9 | 11167 | |
b93a436e JL |
11168 | /* Get the rtx comparison code to use. We know that EXP is a comparison |
11169 | operation of some type. Some comparisons against 1 and -1 can be | |
11170 | converted to comparisons with zero. Do so here so that the tests | |
11171 | below will be aware that we have a comparison with zero. These | |
11172 | tests will not catch constants in the first operand, but constants | |
11173 | are rarely passed as the first operand. */ | |
ca695ac9 | 11174 | |
b93a436e JL |
11175 | switch (TREE_CODE (exp)) |
11176 | { | |
11177 | case EQ_EXPR: | |
11178 | code = EQ; | |
bbf6f052 | 11179 | break; |
b93a436e JL |
11180 | case NE_EXPR: |
11181 | code = NE; | |
bbf6f052 | 11182 | break; |
b93a436e JL |
11183 | case LT_EXPR: |
11184 | if (integer_onep (arg1)) | |
11185 | arg1 = integer_zero_node, code = unsignedp ? LEU : LE; | |
11186 | else | |
11187 | code = unsignedp ? LTU : LT; | |
ca695ac9 | 11188 | break; |
b93a436e JL |
11189 | case LE_EXPR: |
11190 | if (! unsignedp && integer_all_onesp (arg1)) | |
11191 | arg1 = integer_zero_node, code = LT; | |
11192 | else | |
11193 | code = unsignedp ? LEU : LE; | |
ca695ac9 | 11194 | break; |
b93a436e JL |
11195 | case GT_EXPR: |
11196 | if (! unsignedp && integer_all_onesp (arg1)) | |
11197 | arg1 = integer_zero_node, code = GE; | |
11198 | else | |
11199 | code = unsignedp ? GTU : GT; | |
11200 | break; | |
11201 | case GE_EXPR: | |
11202 | if (integer_onep (arg1)) | |
11203 | arg1 = integer_zero_node, code = unsignedp ? GTU : GT; | |
11204 | else | |
11205 | code = unsignedp ? GEU : GE; | |
ca695ac9 | 11206 | break; |
ca695ac9 | 11207 | default: |
b93a436e | 11208 | abort (); |
bbf6f052 | 11209 | } |
bbf6f052 | 11210 | |
b93a436e JL |
11211 | /* Put a constant second. */ |
11212 | if (TREE_CODE (arg0) == REAL_CST || TREE_CODE (arg0) == INTEGER_CST) | |
11213 | { | |
11214 | tem = arg0; arg0 = arg1; arg1 = tem; | |
11215 | code = swap_condition (code); | |
ca695ac9 | 11216 | } |
bbf6f052 | 11217 | |
b93a436e JL |
11218 | /* If this is an equality or inequality test of a single bit, we can |
11219 | do this by shifting the bit being tested to the low-order bit and | |
11220 | masking the result with the constant 1. If the condition was EQ, | |
11221 | we xor it with 1. This does not require an scc insn and is faster | |
11222 | than an scc insn even if we have it. */ | |
d39985fa | 11223 | |
b93a436e JL |
11224 | if ((code == NE || code == EQ) |
11225 | && TREE_CODE (arg0) == BIT_AND_EXPR && integer_zerop (arg1) | |
11226 | && integer_pow2p (TREE_OPERAND (arg0, 1))) | |
11227 | { | |
11228 | tree inner = TREE_OPERAND (arg0, 0); | |
11229 | int bitnum = tree_log2 (TREE_OPERAND (arg0, 1)); | |
11230 | int ops_unsignedp; | |
bbf6f052 | 11231 | |
b93a436e JL |
11232 | /* If INNER is a right shift of a constant and it plus BITNUM does |
11233 | not overflow, adjust BITNUM and INNER. */ | |
ca695ac9 | 11234 | |
b93a436e JL |
11235 | if (TREE_CODE (inner) == RSHIFT_EXPR |
11236 | && TREE_CODE (TREE_OPERAND (inner, 1)) == INTEGER_CST | |
11237 | && TREE_INT_CST_HIGH (TREE_OPERAND (inner, 1)) == 0 | |
11238 | && (bitnum + TREE_INT_CST_LOW (TREE_OPERAND (inner, 1)) | |
11239 | < TYPE_PRECISION (type))) | |
ca695ac9 | 11240 | { |
b93a436e JL |
11241 | bitnum += TREE_INT_CST_LOW (TREE_OPERAND (inner, 1)); |
11242 | inner = TREE_OPERAND (inner, 0); | |
ca695ac9 | 11243 | } |
ca695ac9 | 11244 | |
b93a436e JL |
11245 | /* If we are going to be able to omit the AND below, we must do our |
11246 | operations as unsigned. If we must use the AND, we have a choice. | |
11247 | Normally unsigned is faster, but for some machines signed is. */ | |
11248 | ops_unsignedp = (bitnum == TYPE_PRECISION (type) - 1 ? 1 | |
11249 | #ifdef LOAD_EXTEND_OP | |
11250 | : (LOAD_EXTEND_OP (operand_mode) == SIGN_EXTEND ? 0 : 1) | |
11251 | #else | |
11252 | : 1 | |
11253 | #endif | |
11254 | ); | |
bbf6f052 | 11255 | |
b93a436e JL |
11256 | if (subtarget == 0 || GET_CODE (subtarget) != REG |
11257 | || GET_MODE (subtarget) != operand_mode | |
e5e809f4 | 11258 | || ! safe_from_p (subtarget, inner, 1)) |
b93a436e | 11259 | subtarget = 0; |
bbf6f052 | 11260 | |
b93a436e | 11261 | op0 = expand_expr (inner, subtarget, VOIDmode, 0); |
bbf6f052 | 11262 | |
b93a436e JL |
11263 | if (bitnum != 0) |
11264 | op0 = expand_shift (RSHIFT_EXPR, GET_MODE (op0), op0, | |
11265 | size_int (bitnum), subtarget, ops_unsignedp); | |
bbf6f052 | 11266 | |
b93a436e JL |
11267 | if (GET_MODE (op0) != mode) |
11268 | op0 = convert_to_mode (mode, op0, ops_unsignedp); | |
bbf6f052 | 11269 | |
b93a436e JL |
11270 | if ((code == EQ && ! invert) || (code == NE && invert)) |
11271 | op0 = expand_binop (mode, xor_optab, op0, const1_rtx, subtarget, | |
11272 | ops_unsignedp, OPTAB_LIB_WIDEN); | |
bbf6f052 | 11273 | |
b93a436e JL |
11274 | /* Put the AND last so it can combine with more things. */ |
11275 | if (bitnum != TYPE_PRECISION (type) - 1) | |
11276 | op0 = expand_and (op0, const1_rtx, subtarget); | |
bbf6f052 | 11277 | |
b93a436e JL |
11278 | return op0; |
11279 | } | |
bbf6f052 | 11280 | |
b93a436e JL |
11281 | /* Now see if we are likely to be able to do this. Return if not. */ |
11282 | if (! can_compare_p (operand_mode)) | |
11283 | return 0; | |
11284 | icode = setcc_gen_code[(int) code]; | |
11285 | if (icode == CODE_FOR_nothing | |
11286 | || (only_cheap && insn_operand_mode[(int) icode][0] != mode)) | |
ca695ac9 | 11287 | { |
b93a436e JL |
11288 | /* We can only do this if it is one of the special cases that |
11289 | can be handled without an scc insn. */ | |
11290 | if ((code == LT && integer_zerop (arg1)) | |
11291 | || (! only_cheap && code == GE && integer_zerop (arg1))) | |
11292 | ; | |
11293 | else if (BRANCH_COST >= 0 | |
11294 | && ! only_cheap && (code == NE || code == EQ) | |
11295 | && TREE_CODE (type) != REAL_TYPE | |
11296 | && ((abs_optab->handlers[(int) operand_mode].insn_code | |
11297 | != CODE_FOR_nothing) | |
11298 | || (ffs_optab->handlers[(int) operand_mode].insn_code | |
11299 | != CODE_FOR_nothing))) | |
11300 | ; | |
11301 | else | |
11302 | return 0; | |
ca695ac9 | 11303 | } |
b93a436e JL |
11304 | |
11305 | preexpand_calls (exp); | |
11306 | if (subtarget == 0 || GET_CODE (subtarget) != REG | |
11307 | || GET_MODE (subtarget) != operand_mode | |
e5e809f4 | 11308 | || ! safe_from_p (subtarget, arg1, 1)) |
b93a436e JL |
11309 | subtarget = 0; |
11310 | ||
11311 | op0 = expand_expr (arg0, subtarget, VOIDmode, 0); | |
11312 | op1 = expand_expr (arg1, NULL_RTX, VOIDmode, 0); | |
11313 | ||
11314 | if (target == 0) | |
11315 | target = gen_reg_rtx (mode); | |
11316 | ||
11317 | /* Pass copies of OP0 and OP1 in case they contain a QUEUED. This is safe | |
11318 | because, if the emit_store_flag does anything it will succeed and | |
11319 | OP0 and OP1 will not be used subsequently. */ | |
ca695ac9 | 11320 | |
b93a436e JL |
11321 | result = emit_store_flag (target, code, |
11322 | queued_subexp_p (op0) ? copy_rtx (op0) : op0, | |
11323 | queued_subexp_p (op1) ? copy_rtx (op1) : op1, | |
11324 | operand_mode, unsignedp, 1); | |
ca695ac9 | 11325 | |
b93a436e JL |
11326 | if (result) |
11327 | { | |
11328 | if (invert) | |
11329 | result = expand_binop (mode, xor_optab, result, const1_rtx, | |
11330 | result, 0, OPTAB_LIB_WIDEN); | |
11331 | return result; | |
ca695ac9 | 11332 | } |
bbf6f052 | 11333 | |
b93a436e JL |
11334 | /* If this failed, we have to do this with set/compare/jump/set code. */ |
11335 | if (GET_CODE (target) != REG | |
11336 | || reg_mentioned_p (target, op0) || reg_mentioned_p (target, op1)) | |
11337 | target = gen_reg_rtx (GET_MODE (target)); | |
11338 | ||
11339 | emit_move_insn (target, invert ? const0_rtx : const1_rtx); | |
11340 | result = compare_from_rtx (op0, op1, code, unsignedp, | |
11341 | operand_mode, NULL_RTX, 0); | |
11342 | if (GET_CODE (result) == CONST_INT) | |
11343 | return (((result == const0_rtx && ! invert) | |
11344 | || (result != const0_rtx && invert)) | |
11345 | ? const0_rtx : const1_rtx); | |
ca695ac9 | 11346 | |
b93a436e JL |
11347 | label = gen_label_rtx (); |
11348 | if (bcc_gen_fctn[(int) code] == 0) | |
11349 | abort (); | |
0f41302f | 11350 | |
b93a436e JL |
11351 | emit_jump_insn ((*bcc_gen_fctn[(int) code]) (label)); |
11352 | emit_move_insn (target, invert ? const1_rtx : const0_rtx); | |
11353 | emit_label (label); | |
bbf6f052 | 11354 | |
b93a436e | 11355 | return target; |
ca695ac9 | 11356 | } |
b93a436e JL |
11357 | \f |
11358 | /* Generate a tablejump instruction (used for switch statements). */ | |
11359 | ||
11360 | #ifdef HAVE_tablejump | |
e87b4f3f | 11361 | |
b93a436e JL |
11362 | /* INDEX is the value being switched on, with the lowest value |
11363 | in the table already subtracted. | |
11364 | MODE is its expected mode (needed if INDEX is constant). | |
11365 | RANGE is the length of the jump table. | |
11366 | TABLE_LABEL is a CODE_LABEL rtx for the table itself. | |
88d3b7f0 | 11367 | |
b93a436e JL |
11368 | DEFAULT_LABEL is a CODE_LABEL rtx to jump to if the |
11369 | index value is out of range. */ | |
0f41302f | 11370 | |
ca695ac9 | 11371 | void |
b93a436e JL |
11372 | do_tablejump (index, mode, range, table_label, default_label) |
11373 | rtx index, range, table_label, default_label; | |
11374 | enum machine_mode mode; | |
ca695ac9 | 11375 | { |
b93a436e | 11376 | register rtx temp, vector; |
88d3b7f0 | 11377 | |
b93a436e JL |
11378 | /* Do an unsigned comparison (in the proper mode) between the index |
11379 | expression and the value which represents the length of the range. | |
11380 | Since we just finished subtracting the lower bound of the range | |
11381 | from the index expression, this comparison allows us to simultaneously | |
11382 | check that the original index expression value is both greater than | |
11383 | or equal to the minimum value of the range and less than or equal to | |
11384 | the maximum value of the range. */ | |
709f5be1 | 11385 | |
b93a436e JL |
11386 | emit_cmp_insn (index, range, GTU, NULL_RTX, mode, 1, 0); |
11387 | emit_jump_insn (gen_bgtu (default_label)); | |
bbf6f052 | 11388 | |
b93a436e JL |
11389 | /* If index is in range, it must fit in Pmode. |
11390 | Convert to Pmode so we can index with it. */ | |
11391 | if (mode != Pmode) | |
11392 | index = convert_to_mode (Pmode, index, 1); | |
bbf6f052 | 11393 | |
b93a436e JL |
11394 | /* Don't let a MEM slip thru, because then INDEX that comes |
11395 | out of PIC_CASE_VECTOR_ADDRESS won't be a valid address, | |
11396 | and break_out_memory_refs will go to work on it and mess it up. */ | |
11397 | #ifdef PIC_CASE_VECTOR_ADDRESS | |
11398 | if (flag_pic && GET_CODE (index) != REG) | |
11399 | index = copy_to_mode_reg (Pmode, index); | |
11400 | #endif | |
ca695ac9 | 11401 | |
b93a436e JL |
11402 | /* If flag_force_addr were to affect this address |
11403 | it could interfere with the tricky assumptions made | |
11404 | about addresses that contain label-refs, | |
11405 | which may be valid only very near the tablejump itself. */ | |
11406 | /* ??? The only correct use of CASE_VECTOR_MODE is the one inside the | |
11407 | GET_MODE_SIZE, because this indicates how large insns are. The other | |
11408 | uses should all be Pmode, because they are addresses. This code | |
11409 | could fail if addresses and insns are not the same size. */ | |
11410 | index = gen_rtx_PLUS (Pmode, | |
11411 | gen_rtx_MULT (Pmode, index, | |
11412 | GEN_INT (GET_MODE_SIZE (CASE_VECTOR_MODE))), | |
11413 | gen_rtx_LABEL_REF (Pmode, table_label)); | |
11414 | #ifdef PIC_CASE_VECTOR_ADDRESS | |
11415 | if (flag_pic) | |
11416 | index = PIC_CASE_VECTOR_ADDRESS (index); | |
11417 | else | |
bbf6f052 | 11418 | #endif |
b93a436e JL |
11419 | index = memory_address_noforce (CASE_VECTOR_MODE, index); |
11420 | temp = gen_reg_rtx (CASE_VECTOR_MODE); | |
11421 | vector = gen_rtx_MEM (CASE_VECTOR_MODE, index); | |
11422 | RTX_UNCHANGING_P (vector) = 1; | |
11423 | convert_move (temp, vector, 0); | |
11424 | ||
11425 | emit_jump_insn (gen_tablejump (temp, table_label)); | |
11426 | ||
11427 | /* If we are generating PIC code or if the table is PC-relative, the | |
11428 | table and JUMP_INSN must be adjacent, so don't output a BARRIER. */ | |
11429 | if (! CASE_VECTOR_PC_RELATIVE && ! flag_pic) | |
11430 | emit_barrier (); | |
bbf6f052 | 11431 | } |
b93a436e JL |
11432 | |
11433 | #endif /* HAVE_tablejump */ |