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e8bbfc4e | 1 | /* Definitions for code generation pass of GNU compiler. |
ef58a523 JL |
2 | Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
3 | 1999, 2000 Free Software Foundation, Inc. | |
e8bbfc4e | 4 | |
1322177d | 5 | This file is part of GCC. |
e8bbfc4e | 6 | |
1322177d LB |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 2, or (at your option) any later | |
10 | version. | |
e8bbfc4e | 11 | |
1322177d LB |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
e8bbfc4e RK |
16 | |
17 | You should have received a copy of the GNU General Public License | |
1322177d LB |
18 | along with GCC; see the file COPYING. If not, write to the Free |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
e8bbfc4e | 21 | |
e8bbfc4e RK |
22 | /* The default branch cost is 1. */ |
23 | #ifndef BRANCH_COST | |
24 | #define BRANCH_COST 1 | |
25 | #endif | |
26 | ||
27 | /* Macros to access the slots of a QUEUED rtx. | |
28 | Here rather than in rtl.h because only the expansion pass | |
29 | should ever encounter a QUEUED. */ | |
30 | ||
31 | /* The variable for which an increment is queued. */ | |
32 | #define QUEUED_VAR(P) XEXP (P, 0) | |
33 | /* If the increment has been emitted, this is the insn | |
41b083c4 R |
34 | that does the increment. It is zero before the increment is emitted. |
35 | If more than one insn is emitted, this is the first insn. */ | |
e8bbfc4e RK |
36 | #define QUEUED_INSN(P) XEXP (P, 1) |
37 | /* If a pre-increment copy has been generated, this is the copy | |
38 | (it is a temporary reg). Zero if no copy made yet. */ | |
39 | #define QUEUED_COPY(P) XEXP (P, 2) | |
40 | /* This is the body to use for the insn to do the increment. | |
41 | It is used to emit the increment. */ | |
42 | #define QUEUED_BODY(P) XEXP (P, 3) | |
43 | /* Next QUEUED in the queue. */ | |
44 | #define QUEUED_NEXT(P) XEXP (P, 4) | |
45 | ||
46 | /* This is the 4th arg to `expand_expr'. | |
47 | EXPAND_SUM means it is ok to return a PLUS rtx or MULT rtx. | |
48 | EXPAND_INITIALIZER is similar but also record any labels on forced_labels. | |
49 | EXPAND_CONST_ADDRESS means it is ok to return a MEM whose address | |
99b5da08 RK |
50 | is a constant that is not a legitimate address. |
51 | EXPAND_MEMORY_USE_* are explained below. */ | |
e8bbfc4e | 52 | enum expand_modifier {EXPAND_NORMAL, EXPAND_SUM, |
99b5da08 RK |
53 | EXPAND_CONST_ADDRESS, EXPAND_INITIALIZER, |
54 | EXPAND_MEMORY_USE_WO, EXPAND_MEMORY_USE_RW, | |
55 | EXPAND_MEMORY_USE_BAD, EXPAND_MEMORY_USE_DONT}; | |
56 | ||
57 | /* Argument for chkr_* functions. | |
58 | MEMORY_USE_RO: the pointer reads memory. | |
59 | MEMORY_USE_WO: the pointer writes to memory. | |
60 | MEMORY_USE_RW: the pointer modifies memory (ie it reads and writes). An | |
61 | example is (*ptr)++ | |
62 | MEMORY_USE_BAD: use this if you don't know the behavior of the pointer, or | |
63 | if you know there are no pointers. Using an INDIRECT_REF | |
64 | with MEMORY_USE_BAD will abort. | |
65 | MEMORY_USE_TW: just test for writing, without update. Special. | |
66 | MEMORY_USE_DONT: the memory is neither read nor written. This is used by | |
67 | '->' and '.'. */ | |
68 | enum memory_use_mode {MEMORY_USE_BAD = 0, MEMORY_USE_RO = 1, | |
69 | MEMORY_USE_WO = 2, MEMORY_USE_RW = 3, | |
70 | MEMORY_USE_TW = 6, MEMORY_USE_DONT = 99}; | |
e8bbfc4e | 71 | |
5c7a310f MM |
72 | /* Prevent the compiler from deferring stack pops. See |
73 | inhibit_defer_pop for more information. */ | |
74 | #define NO_DEFER_POP (inhibit_defer_pop += 1) | |
75 | ||
76 | /* Allow the compiler to defer stack pops. See inhibit_defer_pop for | |
77 | more information. */ | |
78 | #define OK_DEFER_POP (inhibit_defer_pop -= 1) | |
e8bbfc4e RK |
79 | \f |
80 | #ifdef TREE_CODE /* Don't lose if tree.h not included. */ | |
81 | /* Structure to record the size of a sequence of arguments | |
fed3cef0 RK |
82 | as the sum of a tree-expression and a constant. This structure is |
83 | also used to store offsets from the stack, which might be negative, | |
84 | so the variable part must be ssizetype, not sizetype. */ | |
e8bbfc4e RK |
85 | |
86 | struct args_size | |
87 | { | |
e5e809f4 | 88 | HOST_WIDE_INT constant; |
e8bbfc4e RK |
89 | tree var; |
90 | }; | |
91 | #endif | |
92 | ||
93 | /* Add the value of the tree INC to the `struct args_size' TO. */ | |
94 | ||
95 | #define ADD_PARM_SIZE(TO, INC) \ | |
96 | { tree inc = (INC); \ | |
3bdf5ad1 RK |
97 | if (host_integerp (inc, 0)) \ |
98 | (TO).constant += tree_low_cst (inc, 0); \ | |
e8bbfc4e RK |
99 | else if ((TO).var == 0) \ |
100 | (TO).var = inc; \ | |
101 | else \ | |
102 | (TO).var = size_binop (PLUS_EXPR, (TO).var, inc); } | |
103 | ||
104 | #define SUB_PARM_SIZE(TO, DEC) \ | |
105 | { tree dec = (DEC); \ | |
3bdf5ad1 RK |
106 | if (host_integerp (dec, 0)) \ |
107 | (TO).constant -= tree_low_cst (dec, 0); \ | |
e8bbfc4e | 108 | else if ((TO).var == 0) \ |
fed3cef0 | 109 | (TO).var = size_binop (MINUS_EXPR, ssize_int (0), dec); \ |
e8bbfc4e RK |
110 | else \ |
111 | (TO).var = size_binop (MINUS_EXPR, (TO).var, dec); } | |
112 | ||
fed3cef0 RK |
113 | /* Convert the implicit sum in a `struct args_size' into a tree |
114 | of type ssizetype. */ | |
115 | #define ARGS_SIZE_TREE(SIZE) \ | |
116 | ((SIZE).var == 0 ? ssize_int ((SIZE).constant) \ | |
117 | : size_binop (PLUS_EXPR, (SIZE).var, ssize_int ((SIZE).constant))) | |
118 | ||
e8bbfc4e | 119 | /* Convert the implicit sum in a `struct args_size' into an rtx. */ |
fed3cef0 RK |
120 | #define ARGS_SIZE_RTX(SIZE) \ |
121 | ((SIZE).var == 0 ? GEN_INT ((SIZE).constant) \ | |
122 | : expand_expr (ARGS_SIZE_TREE (SIZE), NULL_RTX, VOIDmode, \ | |
123 | EXPAND_MEMORY_USE_BAD)) | |
e8bbfc4e RK |
124 | |
125 | /* Supply a default definition for FUNCTION_ARG_PADDING: | |
355b2097 | 126 | usually pad upward, but pad short args downward on |
e8bbfc4e RK |
127 | big-endian machines. */ |
128 | ||
129 | enum direction {none, upward, downward}; /* Value has this type. */ | |
130 | ||
131 | #ifndef FUNCTION_ARG_PADDING | |
e8bbfc4e | 132 | #define FUNCTION_ARG_PADDING(MODE, TYPE) \ |
f76b9db2 ILT |
133 | (! BYTES_BIG_ENDIAN \ |
134 | ? upward \ | |
135 | : (((MODE) == BLKmode \ | |
136 | ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \ | |
137 | && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \ | |
138 | : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY) \ | |
139 | ? downward : upward)) | |
e8bbfc4e RK |
140 | #endif |
141 | ||
142 | /* Supply a default definition for FUNCTION_ARG_BOUNDARY. Normally, we let | |
143 | FUNCTION_ARG_PADDING, which also pads the length, handle any needed | |
144 | alignment. */ | |
145 | ||
146 | #ifndef FUNCTION_ARG_BOUNDARY | |
147 | #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) PARM_BOUNDARY | |
148 | #endif | |
149 | ||
e5e809f4 JL |
150 | /* Provide a default value for STRICT_ARGUMENT_NAMING. */ |
151 | #ifndef STRICT_ARGUMENT_NAMING | |
152 | #define STRICT_ARGUMENT_NAMING 0 | |
153 | #endif | |
154 | ||
9ab70a9b R |
155 | /* Provide a default value for PRETEND_OUTGOING_VARARGS_NAMED. */ |
156 | #ifdef SETUP_INCOMING_VARARGS | |
157 | #ifndef PRETEND_OUTGOING_VARARGS_NAMED | |
158 | #define PRETEND_OUTGOING_VARARGS_NAMED 1 | |
159 | #endif | |
160 | #else | |
161 | /* It is an error to define PRETEND_OUTGOING_VARARGS_NAMED without | |
162 | defining SETUP_INCOMING_VARARGS. */ | |
163 | #define PRETEND_OUTGOING_VARARGS_NAMED 0 | |
164 | #endif | |
165 | ||
e8bbfc4e RK |
166 | /* Nonzero if we do not know how to pass TYPE solely in registers. |
167 | We cannot do so in the following cases: | |
168 | ||
169 | - if the type has variable size | |
170 | - if the type is marked as addressable (it is required to be constructed | |
171 | into the stack) | |
172 | - if the padding and mode of the type is such that a copy into a register | |
e7cf2d7e RK |
173 | would put it into the wrong part of the register. |
174 | ||
14a8d078 | 175 | Which padding can't be supported depends on the byte endianness. |
e8bbfc4e | 176 | |
e7cf2d7e | 177 | A value in a register is implicitly padded at the most significant end. |
e8bbfc4e RK |
178 | On a big-endian machine, that is the lower end in memory. |
179 | So a value padded in memory at the upper end can't go in a register. | |
180 | For a little-endian machine, the reverse is true. */ | |
181 | ||
d9a4ee00 | 182 | #ifndef MUST_PASS_IN_STACK |
e8bbfc4e RK |
183 | #define MUST_PASS_IN_STACK(MODE,TYPE) \ |
184 | ((TYPE) != 0 \ | |
185 | && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST \ | |
186 | || TREE_ADDRESSABLE (TYPE) \ | |
187 | || ((MODE) == BLKmode \ | |
6fb713ce RK |
188 | && ! ((TYPE) != 0 && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \ |
189 | && 0 == (int_size_in_bytes (TYPE) \ | |
190 | % (PARM_BOUNDARY / BITS_PER_UNIT))) \ | |
e8bbfc4e | 191 | && (FUNCTION_ARG_PADDING (MODE, TYPE) \ |
f76b9db2 | 192 | == (BYTES_BIG_ENDIAN ? upward : downward))))) |
d9a4ee00 | 193 | #endif |
e8bbfc4e | 194 | |
e14fa9c4 | 195 | /* Nonzero if type TYPE should be returned in memory. |
e8bbfc4e RK |
196 | Most machines can use the following default definition. */ |
197 | ||
198 | #ifndef RETURN_IN_MEMORY | |
e14fa9c4 | 199 | #define RETURN_IN_MEMORY(TYPE) (TYPE_MODE (TYPE) == BLKmode) |
e8bbfc4e | 200 | #endif |
f7761c9a | 201 | |
a260abc9 DE |
202 | /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save. |
203 | Normally move_insn, so Pmode stack pointer. */ | |
204 | ||
205 | #ifndef STACK_SAVEAREA_MODE | |
206 | #define STACK_SAVEAREA_MODE(LEVEL) Pmode | |
207 | #endif | |
208 | ||
39403d82 DE |
209 | /* Supply a default definition of STACK_SIZE_MODE for |
210 | allocate_dynamic_stack_space. Normally PLUS/MINUS, so word_mode. */ | |
211 | ||
212 | #ifndef STACK_SIZE_MODE | |
213 | #define STACK_SIZE_MODE word_mode | |
214 | #endif | |
215 | ||
f7761c9a RK |
216 | /* Provide default values for the macros controlling stack checking. */ |
217 | ||
218 | #ifndef STACK_CHECK_BUILTIN | |
219 | #define STACK_CHECK_BUILTIN 0 | |
220 | #endif | |
221 | ||
222 | /* The default interval is one page. */ | |
223 | #ifndef STACK_CHECK_PROBE_INTERVAL | |
224 | #define STACK_CHECK_PROBE_INTERVAL 4096 | |
225 | #endif | |
226 | ||
227 | /* The default is to do a store into the stack. */ | |
228 | #ifndef STACK_CHECK_PROBE_LOAD | |
229 | #define STACK_CHECK_PROBE_LOAD 0 | |
230 | #endif | |
231 | ||
232 | /* This value is arbitrary, but should be sufficient for most machines. */ | |
233 | #ifndef STACK_CHECK_PROTECT | |
234 | #define STACK_CHECK_PROTECT (75 * UNITS_PER_WORD) | |
235 | #endif | |
236 | ||
237 | /* Make the maximum frame size be the largest we can and still only need | |
238 | one probe per function. */ | |
239 | #ifndef STACK_CHECK_MAX_FRAME_SIZE | |
240 | #define STACK_CHECK_MAX_FRAME_SIZE \ | |
241 | (STACK_CHECK_PROBE_INTERVAL - UNITS_PER_WORD) | |
242 | #endif | |
243 | ||
244 | /* This is arbitrary, but should be large enough everywhere. */ | |
245 | #ifndef STACK_CHECK_FIXED_FRAME_SIZE | |
246 | #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD) | |
247 | #endif | |
248 | ||
249 | /* Provide a reasonable default for the maximum size of an object to | |
250 | allocate in the fixed frame. We may need to be able to make this | |
251 | controllable by the user at some point. */ | |
252 | #ifndef STACK_CHECK_MAX_VAR_SIZE | |
253 | #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100) | |
254 | #endif | |
e8bbfc4e | 255 | \f |
e78d8e51 ZW |
256 | /* Functions from optabs.c, commonly used, and without need for the optabs |
257 | tables: */ | |
e8bbfc4e | 258 | |
ef89d648 ZW |
259 | /* Passed to expand_simple_binop and expand_binop to say which options |
260 | to try to use if the requested operation can't be open-coded on the | |
261 | requisite mode. Either OPTAB_LIB or OPTAB_LIB_WIDEN says try using | |
262 | a library call. Either OPTAB_WIDEN or OPTAB_LIB_WIDEN says try | |
263 | using a wider mode. OPTAB_MUST_WIDEN says try widening and don't | |
264 | try anything else. */ | |
265 | ||
266 | enum optab_methods | |
267 | { | |
268 | OPTAB_DIRECT, | |
269 | OPTAB_LIB, | |
270 | OPTAB_WIDEN, | |
271 | OPTAB_LIB_WIDEN, | |
272 | OPTAB_MUST_WIDEN | |
273 | }; | |
274 | ||
275 | /* Generate code for a simple binary or unary operation. "Simple" in | |
276 | this case means "can be unambiguously described by a (mode, code) | |
277 | pair and mapped to a single optab." */ | |
278 | extern rtx expand_simple_binop PARAMS ((enum machine_mode, enum rtx_code, rtx, | |
279 | rtx, rtx, int, enum optab_methods)); | |
280 | extern rtx expand_simple_unop PARAMS ((enum machine_mode, enum rtx_code, | |
281 | rtx, rtx, int)); | |
282 | ||
283 | /* Report whether the machine description contains an insn which can | |
284 | perform the operation described by CODE and MODE. */ | |
285 | extern int have_insn_for PARAMS ((enum rtx_code, enum machine_mode)); | |
286 | ||
19eb1ad7 | 287 | /* Emit code to make a call to a constant function or a library call. */ |
711d877c | 288 | extern void emit_libcall_block PARAMS ((rtx, rtx, rtx, rtx)); |
e8bbfc4e | 289 | |
e78d8e51 ZW |
290 | /* Create but don't emit one rtl instruction to perform certain operations. |
291 | Modes must match; operands must meet the operation's predicates. | |
292 | Likewise for subtraction and for just copying. | |
293 | These do not call protect_from_queue; caller must do so. */ | |
294 | extern rtx gen_add2_insn PARAMS ((rtx, rtx)); | |
295 | extern rtx gen_add3_insn PARAMS ((rtx, rtx, rtx)); | |
296 | extern rtx gen_sub2_insn PARAMS ((rtx, rtx)); | |
ef89d648 | 297 | extern rtx gen_sub3_insn PARAMS ((rtx, rtx, rtx)); |
e78d8e51 ZW |
298 | extern rtx gen_move_insn PARAMS ((rtx, rtx)); |
299 | extern int have_add2_insn PARAMS ((rtx, rtx)); | |
300 | extern int have_sub2_insn PARAMS ((rtx, rtx)); | |
12e74c9e | 301 | |
362cc3d4 MH |
302 | /* Emit a pair of rtl insns to compare two rtx's and to jump |
303 | to a label if the comparison is true. */ | |
711d877c | 304 | extern void emit_cmp_and_jump_insns PARAMS ((rtx, rtx, enum rtx_code, rtx, |
19caa751 RK |
305 | enum machine_mode, int, |
306 | unsigned int, rtx)); | |
362cc3d4 | 307 | |
12e74c9e | 308 | /* Generate code to indirectly jump to a location given in the rtx LOC. */ |
711d877c | 309 | extern void emit_indirect_jump PARAMS ((rtx)); |
12e74c9e | 310 | |
423933c2 DE |
311 | #ifdef HAVE_conditional_move |
312 | /* Emit a conditional move operation. */ | |
711d877c KG |
313 | rtx emit_conditional_move PARAMS ((rtx, enum rtx_code, rtx, rtx, |
314 | enum machine_mode, rtx, rtx, | |
315 | enum machine_mode, int)); | |
423933c2 DE |
316 | |
317 | /* Return non-zero if the conditional move is supported. */ | |
711d877c | 318 | int can_conditionally_move_p PARAMS ((enum machine_mode mode)); |
e9576d2c | 319 | |
423933c2 DE |
320 | #endif |
321 | ||
12e74c9e | 322 | \f |
bda63bf1 | 323 | /* Functions from expmed.c: */ |
e8bbfc4e | 324 | |
12e74c9e RK |
325 | /* Arguments MODE, RTX: return an rtx for the negation of that value. |
326 | May emit insns. */ | |
711d877c | 327 | extern rtx negate_rtx PARAMS ((enum machine_mode, rtx)); |
e8bbfc4e | 328 | |
12e74c9e | 329 | /* Expand a logical AND operation. */ |
711d877c | 330 | extern rtx expand_and PARAMS ((rtx, rtx, rtx)); |
e8bbfc4e | 331 | |
12e74c9e | 332 | /* Emit a store-flag operation. */ |
711d877c KG |
333 | extern rtx emit_store_flag PARAMS ((rtx, enum rtx_code, rtx, rtx, |
334 | enum machine_mode, int, int)); | |
e8bbfc4e | 335 | |
c0eccde6 | 336 | /* Like emit_store_flag, but always succeeds. */ |
711d877c KG |
337 | extern rtx emit_store_flag_force PARAMS ((rtx, enum rtx_code, rtx, rtx, |
338 | enum machine_mode, int, int)); | |
c0eccde6 | 339 | |
12e74c9e | 340 | /* Functions from loop.c: */ |
e8bbfc4e | 341 | |
a49a6a68 JW |
342 | /* Given an insn and condition, return a canonical description of |
343 | the test being made. */ | |
10f13594 | 344 | extern rtx canonicalize_condition PARAMS ((rtx, rtx, int, rtx *, rtx)); |
a49a6a68 JW |
345 | |
346 | /* Given a JUMP_INSN, return a canonical description of the test | |
347 | being made. */ | |
711d877c | 348 | extern rtx get_condition PARAMS ((rtx, rtx *)); |
e0cd0770 JC |
349 | |
350 | /* Generate a conditional trap instruction. */ | |
711d877c | 351 | extern rtx gen_cond_trap PARAMS ((enum rtx_code, rtx, rtx, rtx)); |
12e74c9e | 352 | \f |
28f4ec01 BS |
353 | /* Functions from builtins.c: */ |
354 | #ifdef TREE_CODE | |
711d877c KG |
355 | extern rtx expand_builtin PARAMS ((tree, rtx, rtx, enum machine_mode, int)); |
356 | extern void std_expand_builtin_va_start PARAMS ((int, tree, rtx)); | |
357 | extern rtx std_expand_builtin_va_arg PARAMS ((tree, tree)); | |
358 | extern rtx expand_builtin_va_arg PARAMS ((tree, tree)); | |
f6155fda SS |
359 | extern void default_init_builtins PARAMS ((void)); |
360 | extern rtx default_expand_builtin PARAMS ((tree, rtx, rtx, | |
361 | enum machine_mode, int)); | |
28f4ec01 BS |
362 | #endif |
363 | ||
250d07b6 RH |
364 | extern void expand_builtin_setjmp_setup PARAMS ((rtx, rtx)); |
365 | extern void expand_builtin_setjmp_receiver PARAMS ((rtx)); | |
711d877c KG |
366 | extern void expand_builtin_longjmp PARAMS ((rtx, rtx)); |
367 | extern rtx expand_builtin_saveregs PARAMS ((void)); | |
3bdf5ad1 RK |
368 | extern HOST_WIDE_INT get_varargs_alias_set PARAMS ((void)); |
369 | extern HOST_WIDE_INT get_frame_alias_set PARAMS ((void)); | |
370 | extern void record_base_value PARAMS ((unsigned int, rtx, int)); | |
371 | extern void record_alias_subset PARAMS ((HOST_WIDE_INT, | |
372 | HOST_WIDE_INT)); | |
3bdf5ad1 | 373 | extern HOST_WIDE_INT new_alias_set PARAMS ((void)); |
28f4ec01 | 374 | \f |
12e74c9e | 375 | /* Functions from expr.c: */ |
cb411bd6 | 376 | |
12e74c9e RK |
377 | /* This is run once per compilation to set up which modes can be used |
378 | directly in memory and to initialize the block move optab. */ | |
711d877c | 379 | extern void init_expr_once PARAMS ((void)); |
12e74c9e RK |
380 | |
381 | /* This is run at the start of compiling a function. */ | |
711d877c | 382 | extern void init_expr PARAMS ((void)); |
12e74c9e | 383 | |
d7db6646 RH |
384 | /* This function is run once to initialize stor-layout.c. */ |
385 | ||
711d877c | 386 | extern void init_stor_layout_once PARAMS ((void)); |
d7db6646 | 387 | |
49ad7cfa | 388 | /* This is run at the end of compiling a function. */ |
711d877c | 389 | extern void finish_expr_for_function PARAMS ((void)); |
49ad7cfa | 390 | |
12e74c9e RK |
391 | /* Use protect_from_queue to convert a QUEUED expression |
392 | into something that you can put immediately into an instruction. */ | |
711d877c | 393 | extern rtx protect_from_queue PARAMS ((rtx, int)); |
12e74c9e RK |
394 | |
395 | /* Perform all the pending incrementations. */ | |
711d877c | 396 | extern void emit_queue PARAMS ((void)); |
b4cb4994 | 397 | |
1f06ee8d | 398 | /* Tell if something has a queued subexpression. */ |
711d877c | 399 | extern int queued_subexp_p PARAMS ((rtx)); |
1f06ee8d | 400 | |
e8bbfc4e RK |
401 | /* Emit some rtl insns to move data between rtx's, converting machine modes. |
402 | Both modes must be floating or both fixed. */ | |
711d877c | 403 | extern void convert_move PARAMS ((rtx, rtx, int)); |
e8bbfc4e RK |
404 | |
405 | /* Convert an rtx to specified machine mode and return the result. */ | |
711d877c | 406 | extern rtx convert_to_mode PARAMS ((enum machine_mode, rtx, int)); |
e8bbfc4e | 407 | |
3fad11c9 | 408 | /* Convert an rtx to MODE from OLDMODE and return the result. */ |
729a2125 RK |
409 | extern rtx convert_modes PARAMS ((enum machine_mode, enum machine_mode, |
410 | rtx, int)); | |
3fad11c9 | 411 | |
bda63bf1 | 412 | /* Emit code to move a block Y to a block X. */ |
8ac61af7 | 413 | extern rtx emit_block_move PARAMS ((rtx, rtx, rtx)); |
12e74c9e RK |
414 | |
415 | /* Copy all or part of a value X into registers starting at REGNO. | |
416 | The number of registers to be filled is NREGS. */ | |
711d877c | 417 | extern void move_block_to_reg PARAMS ((int, rtx, int, enum machine_mode)); |
12e74c9e RK |
418 | |
419 | /* Copy all or part of a BLKmode value X out of registers starting at REGNO. | |
420 | The number of registers to be filled is NREGS. */ | |
711d877c | 421 | extern void move_block_from_reg PARAMS ((int, rtx, int, int)); |
12e74c9e | 422 | |
ae73d3be JW |
423 | /* Load a BLKmode value into non-consecutive registers represented by a |
424 | PARALLEL. */ | |
729a2125 RK |
425 | extern void emit_group_load PARAMS ((rtx, rtx, int, unsigned int)); |
426 | ||
ae73d3be JW |
427 | /* Store a BLKmode value from non-consecutive registers represented by a |
428 | PARALLEL. */ | |
729a2125 | 429 | extern void emit_group_store PARAMS ((rtx, rtx, int, unsigned int)); |
ae73d3be | 430 | |
c36fce9a | 431 | #ifdef TREE_CODE |
19eb1ad7 | 432 | /* Copy BLKmode object from a set of registers. */ |
711d877c | 433 | extern rtx copy_blkmode_from_reg PARAMS ((rtx,rtx,tree)); |
c36fce9a GRK |
434 | #endif |
435 | ||
8c99eaf6 | 436 | /* Mark REG as holding a parameter for the next CALL_INSN. */ |
711d877c | 437 | extern void use_reg PARAMS ((rtx *, rtx)); |
729a2125 | 438 | |
8c99eaf6 RK |
439 | /* Mark NREGS consecutive regs, starting at REGNO, as holding parameters |
440 | for the next CALL_INSN. */ | |
711d877c | 441 | extern void use_regs PARAMS ((rtx *, int, int)); |
729a2125 | 442 | |
ae73d3be | 443 | /* Mark a PARALLEL as holding a parameter for the next CALL_INSN. */ |
711d877c | 444 | extern void use_group_regs PARAMS ((rtx *, rtx)); |
12e74c9e RK |
445 | |
446 | /* Write zeros through the storage of OBJECT. | |
8ac61af7 RK |
447 | If OBJECT has BLKmode, SIZE is its length in bytes. */ |
448 | extern rtx clear_storage PARAMS ((rtx, rtx)); | |
12e74c9e | 449 | |
57814e5e JJ |
450 | /* Return non-zero if it is desirable to store LEN bytes generated by |
451 | CONSTFUN with several move instructions by store_by_pieces | |
452 | function. CONSTFUNDATA is a pointer which will be passed as argument | |
453 | in every CONSTFUN call. | |
454 | ALIGN is maximum alignment we can assume. */ | |
455 | extern int can_store_by_pieces PARAMS ((unsigned HOST_WIDE_INT, | |
456 | rtx (*) (PTR, HOST_WIDE_INT, | |
457 | enum machine_mode), | |
458 | PTR, unsigned int)); | |
459 | ||
460 | /* Generate several move instructions to store LEN bytes generated by | |
461 | CONSTFUN to block TO. (A MEM rtx with BLKmode). CONSTFUNDATA is a | |
462 | pointer which will be passed as argument in every CONSTFUN call. | |
463 | ALIGN is maximum alignment we can assume. */ | |
464 | extern void store_by_pieces PARAMS ((rtx, unsigned HOST_WIDE_INT, | |
465 | rtx (*) (PTR, HOST_WIDE_INT, | |
466 | enum machine_mode), | |
467 | PTR, unsigned int)); | |
468 | ||
12e74c9e | 469 | /* Emit insns to set X from Y. */ |
711d877c | 470 | extern rtx emit_move_insn PARAMS ((rtx, rtx)); |
12e74c9e RK |
471 | |
472 | /* Emit insns to set X from Y, with no frills. */ | |
711d877c | 473 | extern rtx emit_move_insn_1 PARAMS ((rtx, rtx)); |
12e74c9e RK |
474 | |
475 | /* Push a block of length SIZE (perhaps variable) | |
476 | and return an rtx to address the beginning of the block. */ | |
711d877c | 477 | extern rtx push_block PARAMS ((rtx, int, int)); |
12e74c9e | 478 | |
12e74c9e RK |
479 | #ifdef TREE_CODE |
480 | /* Generate code to push something onto the stack, given its mode and type. */ | |
729a2125 RK |
481 | extern void emit_push_insn PARAMS ((rtx, enum machine_mode, tree, rtx, |
482 | unsigned int, int, rtx, int, rtx, rtx, | |
483 | int, rtx)); | |
12e74c9e | 484 | |
19eb1ad7 | 485 | /* Expand an assignment that stores the value of FROM into TO. */ |
711d877c | 486 | extern rtx expand_assignment PARAMS ((tree, tree, int, int)); |
12e74c9e RK |
487 | |
488 | /* Generate code for computing expression EXP, | |
489 | and storing the value into TARGET. | |
490 | If SUGGEST_REG is nonzero, copy the value through a register | |
491 | and return that register, if that is possible. */ | |
711d877c | 492 | extern rtx store_expr PARAMS ((tree, rtx, int)); |
12e74c9e | 493 | #endif |
e8bbfc4e RK |
494 | |
495 | /* Given an rtx that may include add and multiply operations, | |
496 | generate them as insns and return a pseudo-reg containing the value. | |
497 | Useful after calling expand_expr with 1 as sum_ok. */ | |
711d877c | 498 | extern rtx force_operand PARAMS ((rtx, rtx)); |
e8bbfc4e | 499 | |
f47e9b4e RK |
500 | /* Return an object on the placeholder list that matches EXP, a |
501 | PLACEHOLDER_EXPR. An object "matches" if it is of the type of the | |
738cc472 RK |
502 | PLACEHOLDER_EXPR or a pointer type to it. For further information, see |
503 | tree.def. If no such object is found, abort. If PLIST is nonzero, it is | |
504 | a location which initially points to a starting location in the | |
505 | placeholder list (zero means start of the list) and where a pointer into | |
506 | the placeholder list at which the object is found is placed. */ | |
f47e9b4e RK |
507 | extern tree find_placeholder PARAMS ((tree, tree *)); |
508 | ||
12e74c9e RK |
509 | /* Generate code for computing expression EXP. |
510 | An rtx for the computed value is returned. The value is never null. | |
511 | In the case of a void EXP, const0_rtx is returned. */ | |
711d877c KG |
512 | extern rtx expand_expr PARAMS ((tree, rtx, enum machine_mode, |
513 | enum expand_modifier)); | |
12e74c9e RK |
514 | |
515 | /* At the start of a function, record that we have no previously-pushed | |
516 | arguments waiting to be popped. */ | |
711d877c | 517 | extern void init_pending_stack_adjust PARAMS ((void)); |
12e74c9e RK |
518 | |
519 | /* When exiting from function, if safe, clear out any pending stack adjust | |
520 | so the adjustment won't get done. */ | |
711d877c | 521 | extern void clear_pending_stack_adjust PARAMS ((void)); |
12e74c9e RK |
522 | |
523 | /* Pop any previously-pushed arguments that have not been popped yet. */ | |
711d877c | 524 | extern void do_pending_stack_adjust PARAMS ((void)); |
12e74c9e RK |
525 | |
526 | #ifdef TREE_CODE | |
28f4ec01 BS |
527 | /* Return the tree node and offset if a given argument corresponds to |
528 | a string constant. */ | |
711d877c | 529 | extern tree string_constant PARAMS ((tree, tree *)); |
28f4ec01 | 530 | |
12e74c9e | 531 | /* Generate code to evaluate EXP and jump to LABEL if the value is zero. */ |
711d877c | 532 | extern void jumpifnot PARAMS ((tree, rtx)); |
12e74c9e RK |
533 | |
534 | /* Generate code to evaluate EXP and jump to LABEL if the value is nonzero. */ | |
711d877c | 535 | extern void jumpif PARAMS ((tree, rtx)); |
12e74c9e RK |
536 | |
537 | /* Generate code to evaluate EXP and jump to IF_FALSE_LABEL if | |
538 | the result is zero, or IF_TRUE_LABEL if the result is one. */ | |
711d877c | 539 | extern void do_jump PARAMS ((tree, rtx, rtx)); |
12e74c9e RK |
540 | #endif |
541 | ||
542 | /* Generate rtl to compare two rtx's, will call emit_cmp_insn. */ | |
711d877c | 543 | extern rtx compare_from_rtx PARAMS ((rtx, rtx, enum rtx_code, int, |
729a2125 | 544 | enum machine_mode, rtx, unsigned int)); |
711d877c | 545 | extern void do_compare_rtx_and_jump PARAMS ((rtx, rtx, enum rtx_code, int, |
729a2125 RK |
546 | enum machine_mode, rtx, |
547 | unsigned int, rtx, rtx)); | |
12e74c9e | 548 | |
ad82abb8 ZW |
549 | /* Two different ways of generating switch statements. */ |
550 | extern int try_casesi PARAMS ((tree, tree, tree, tree, rtx, rtx)); | |
551 | extern int try_tablejump PARAMS ((tree, tree, tree, tree, rtx, rtx)); | |
552 | ||
553 | /* Smallest number of adjacent cases before we use a jump table. | |
554 | XXX Should be a target hook. */ | |
555 | extern unsigned int case_values_threshold PARAMS ((void)); | |
556 | ||
12e74c9e | 557 | \f |
cb411bd6 RS |
558 | #ifdef TREE_CODE |
559 | /* rtl.h and tree.h were included. */ | |
560 | /* Return an rtx for the size in bytes of the value of an expr. */ | |
711d877c | 561 | extern rtx expr_size PARAMS ((tree)); |
cb411bd6 | 562 | |
711d877c | 563 | extern rtx lookup_static_chain PARAMS ((tree)); |
cb411bd6 RS |
564 | |
565 | /* Convert a stack slot address ADDR valid in function FNDECL | |
566 | into an address valid in this function (using a static chain). */ | |
711d877c | 567 | extern rtx fix_lexical_addr PARAMS ((rtx, tree)); |
cb411bd6 RS |
568 | |
569 | /* Return the address of the trampoline for entering nested fn FUNCTION. */ | |
711d877c | 570 | extern rtx trampoline_address PARAMS ((tree)); |
cb411bd6 RS |
571 | |
572 | /* Return an rtx that refers to the value returned by a function | |
573 | in its original home. This becomes invalid if any more code is emitted. */ | |
711d877c | 574 | extern rtx hard_function_value PARAMS ((tree, tree, int)); |
cb411bd6 | 575 | |
3affaf29 | 576 | extern rtx prepare_call_address PARAMS ((rtx, tree, rtx *, int, int)); |
cb411bd6 | 577 | |
711d877c | 578 | extern rtx expand_call PARAMS ((tree, rtx, int)); |
cb411bd6 | 579 | |
3bdf5ad1 RK |
580 | extern rtx expand_shift PARAMS ((enum tree_code, enum machine_mode, rtx, tree, |
581 | rtx, int)); | |
582 | extern rtx expand_divmod PARAMS ((int, enum tree_code, enum machine_mode, rtx, | |
583 | rtx, rtx, int)); | |
584 | extern void locate_and_pad_parm PARAMS ((enum machine_mode, tree, int, tree, | |
585 | struct args_size *, | |
586 | struct args_size *, | |
587 | struct args_size *, | |
588 | struct args_size *)); | |
711d877c | 589 | extern rtx expand_inline_function PARAMS ((tree, tree, rtx, int, tree, rtx)); |
3bdf5ad1 | 590 | |
cb411bd6 | 591 | /* Return the CODE_LABEL rtx for a LABEL_DECL, creating it if necessary. */ |
711d877c | 592 | extern rtx label_rtx PARAMS ((tree)); |
cb411bd6 RS |
593 | #endif |
594 | ||
626043cf | 595 | /* Indicate how an input argument register was promoted. */ |
770ae6cc RK |
596 | extern rtx promoted_input_arg PARAMS ((unsigned int, enum machine_mode *, |
597 | int *)); | |
626043cf | 598 | |
e8bbfc4e RK |
599 | /* Return an rtx like arg but sans any constant terms. |
600 | Returns the original rtx if it has no constant terms. | |
601 | The constant terms are added and stored via a second arg. */ | |
711d877c | 602 | extern rtx eliminate_constant_term PARAMS ((rtx, rtx *)); |
e8bbfc4e RK |
603 | |
604 | /* Convert arg to a valid memory address for specified machine mode, | |
605 | by emitting insns to perform arithmetic if nec. */ | |
711d877c | 606 | extern rtx memory_address PARAMS ((enum machine_mode, rtx)); |
e8bbfc4e RK |
607 | |
608 | /* Like `memory_address' but pretent `flag_force_addr' is 0. */ | |
711d877c | 609 | extern rtx memory_address_noforce PARAMS ((enum machine_mode, rtx)); |
e8bbfc4e | 610 | |
173b24b9 RK |
611 | /* Set the alias set of MEM to SET. */ |
612 | extern void set_mem_alias_set PARAMS ((rtx, HOST_WIDE_INT)); | |
613 | ||
d022d93e | 614 | /* Set the alignment of MEM to ALIGN bits. */ |
738cc472 RK |
615 | extern void set_mem_align PARAMS ((rtx, unsigned int)); |
616 | ||
e8bbfc4e RK |
617 | /* Return a memory reference like MEMREF, but with its mode changed |
618 | to MODE and its address changed to ADDR. | |
619 | (VOIDmode means don't change the mode. | |
738cc472 RK |
620 | NULL for ADDR means don't change the address.) */ |
621 | extern rtx change_address PARAMS ((rtx, enum machine_mode, rtx)); | |
e8bbfc4e | 622 | |
f4ef873c RK |
623 | /* Return a memory reference like MEMREF, but with its mode changed |
624 | to MODE and its address offset by OFFSET bytes. */ | |
738cc472 RK |
625 | #define adjust_address(MEMREF, MODE, OFFSET) \ |
626 | adjust_address_1 (MEMREF, MODE, OFFSET, 1) | |
f4ef873c | 627 | |
f1ec5147 | 628 | /* Likewise, but the reference is not required to be valid. */ |
738cc472 RK |
629 | #define adjust_address_nv(MEMREF, MODE, OFFSET) \ |
630 | adjust_address_1 (MEMREF, MODE, OFFSET, 0) | |
631 | ||
632 | extern rtx adjust_address_1 PARAMS ((rtx, enum machine_mode, HOST_WIDE_INT, | |
633 | int)); | |
f1ec5147 | 634 | |
0d4903b8 RK |
635 | /* Return a memory reference like MEMREF, but whose address is changed by |
636 | adding OFFSET, an RTX, to it. POW2 is the highest power of two factor | |
637 | known to be in OFFSET (possibly 1). */ | |
638 | extern rtx offset_address PARAMS ((rtx, rtx, HOST_WIDE_INT)); | |
639 | ||
792760b9 RK |
640 | /* Return a memory reference like MEMREF, but with its address changed to |
641 | ADDR. The caller is asserting that the actual piece of memory pointed | |
642 | to is the same, just the form of the address is being changed, such as | |
643 | by putting something into a register. */ | |
644 | extern rtx replace_equiv_address PARAMS ((rtx, rtx)); | |
645 | ||
f1ec5147 RK |
646 | /* Likewise, but the reference is not required to be valid. */ |
647 | extern rtx replace_equiv_address_nv PARAMS ((rtx, rtx)); | |
648 | ||
e8bbfc4e RK |
649 | /* Return a memory reference like MEMREF, but which is known to have a |
650 | valid address. */ | |
711d877c | 651 | extern rtx validize_mem PARAMS ((rtx)); |
e8bbfc4e | 652 | |
3bdf5ad1 | 653 | #ifdef TREE_CODE |
258a120b JM |
654 | /* Given REF, either a MEM or a REG, and T, either the type of X or |
655 | the expression corresponding to REF, set RTX_UNCHANGING_P if | |
656 | appropriate. */ | |
657 | extern void maybe_set_unchanging PARAMS ((rtx, tree)); | |
658 | ||
3bdf5ad1 RK |
659 | /* Given REF, a MEM, and T, either the type of X or the expression |
660 | corresponding to REF, set the memory attributes. OBJECTP is nonzero | |
661 | if we are making a new object of this type. */ | |
662 | extern void set_mem_attributes PARAMS ((rtx, tree, int)); | |
663 | #endif | |
664 | ||
e8bbfc4e | 665 | /* Assemble the static constant template for function entry trampolines. */ |
711d877c | 666 | extern rtx assemble_trampoline_template PARAMS ((void)); |
e8bbfc4e | 667 | |
e8bbfc4e RK |
668 | /* Given rtx, return new rtx whose address won't be affected by |
669 | any side effects. It has been copied to a new temporary reg. */ | |
711d877c | 670 | extern rtx stabilize PARAMS ((rtx)); |
e8bbfc4e RK |
671 | |
672 | /* Given an rtx, copy all regs it refers to into new temps | |
673 | and return a modified copy that refers to the new temps. */ | |
711d877c | 674 | extern rtx copy_all_regs PARAMS ((rtx)); |
e8bbfc4e RK |
675 | |
676 | /* Copy given rtx to a new temp reg and return that. */ | |
711d877c | 677 | extern rtx copy_to_reg PARAMS ((rtx)); |
e8bbfc4e RK |
678 | |
679 | /* Like copy_to_reg but always make the reg Pmode. */ | |
711d877c | 680 | extern rtx copy_addr_to_reg PARAMS ((rtx)); |
e8bbfc4e RK |
681 | |
682 | /* Like copy_to_reg but always make the reg the specified mode MODE. */ | |
711d877c | 683 | extern rtx copy_to_mode_reg PARAMS ((enum machine_mode, rtx)); |
e8bbfc4e RK |
684 | |
685 | /* Copy given rtx to given temp reg and return that. */ | |
711d877c | 686 | extern rtx copy_to_suggested_reg PARAMS ((rtx, rtx, enum machine_mode)); |
e8bbfc4e RK |
687 | |
688 | /* Copy a value to a register if it isn't already a register. | |
689 | Args are mode (in case value is a constant) and the value. */ | |
711d877c | 690 | extern rtx force_reg PARAMS ((enum machine_mode, rtx)); |
e8bbfc4e RK |
691 | |
692 | /* Return given rtx, copied into a new temp reg if it was in memory. */ | |
711d877c | 693 | extern rtx force_not_mem PARAMS ((rtx)); |
e8bbfc4e | 694 | |
9d69b7c8 RK |
695 | #ifdef TREE_CODE |
696 | /* Return mode and signedness to use when object is promoted. */ | |
711d877c KG |
697 | extern enum machine_mode promote_mode PARAMS ((tree, enum machine_mode, |
698 | int *, int)); | |
9d69b7c8 RK |
699 | #endif |
700 | ||
e8bbfc4e | 701 | /* Remove some bytes from the stack. An rtx says how many. */ |
711d877c | 702 | extern void adjust_stack PARAMS ((rtx)); |
e8bbfc4e RK |
703 | |
704 | /* Add some bytes to the stack. An rtx says how many. */ | |
711d877c | 705 | extern void anti_adjust_stack PARAMS ((rtx)); |
e8bbfc4e | 706 | |
59257ff7 RK |
707 | /* This enum is used for the following two functions. */ |
708 | enum save_level {SAVE_BLOCK, SAVE_FUNCTION, SAVE_NONLOCAL}; | |
709 | ||
710 | /* Save the stack pointer at the specified level. */ | |
711d877c | 711 | extern void emit_stack_save PARAMS ((enum save_level, rtx *, rtx)); |
59257ff7 RK |
712 | |
713 | /* Restore the stack pointer from a save area of the specified level. */ | |
711d877c | 714 | extern void emit_stack_restore PARAMS ((enum save_level, rtx, rtx)); |
59257ff7 | 715 | |
e8bbfc4e RK |
716 | /* Allocate some space on the stack dynamically and return its address. An rtx |
717 | says how many bytes. */ | |
711d877c | 718 | extern rtx allocate_dynamic_stack_space PARAMS ((rtx, rtx, int)); |
e8bbfc4e | 719 | |
f7761c9a RK |
720 | /* Probe a range of stack addresses from FIRST to FIRST+SIZE, inclusive. |
721 | FIRST is a constant and size is a Pmode RTX. These are offsets from the | |
722 | current stack pointer. STACK_GROWS_DOWNWARD says whether to add or | |
723 | subtract from the stack. If SIZE is constant, this is done | |
724 | with a fixed number of probes. Otherwise, we must make a loop. */ | |
711d877c | 725 | extern void probe_stack_range PARAMS ((HOST_WIDE_INT, rtx)); |
f7761c9a | 726 | |
e8bbfc4e RK |
727 | /* Return an rtx that refers to the value returned by a library call |
728 | in its original home. This becomes invalid if any more code is emitted. */ | |
711d877c | 729 | extern rtx hard_libcall_value PARAMS ((enum machine_mode)); |
e8bbfc4e | 730 | |
e8bbfc4e RK |
731 | /* Given an rtx, return an rtx for a value rounded up to a multiple |
732 | of STACK_BOUNDARY / BITS_PER_UNIT. */ | |
711d877c | 733 | extern rtx round_push PARAMS ((rtx)); |
e8bbfc4e | 734 | |
da920570 ZW |
735 | /* Return the mode desired by operand N of a particular bitfield |
736 | insert/extract insn, or MAX_MACHINE_MODE if no such insn is | |
737 | available. */ | |
738 | ||
739 | enum extraction_pattern { EP_insv, EP_extv, EP_extzv }; | |
740 | extern enum machine_mode | |
741 | mode_for_extraction PARAMS ((enum extraction_pattern, int)); | |
742 | ||
770ae6cc RK |
743 | extern rtx store_bit_field PARAMS ((rtx, unsigned HOST_WIDE_INT, |
744 | unsigned HOST_WIDE_INT, | |
745 | enum machine_mode, rtx, | |
746 | unsigned int, HOST_WIDE_INT)); | |
747 | extern rtx extract_bit_field PARAMS ((rtx, unsigned HOST_WIDE_INT, | |
748 | unsigned HOST_WIDE_INT, int, rtx, | |
729a2125 | 749 | enum machine_mode, enum machine_mode, |
770ae6cc | 750 | unsigned int, HOST_WIDE_INT)); |
711d877c KG |
751 | extern rtx expand_mult PARAMS ((enum machine_mode, rtx, rtx, rtx, int)); |
752 | extern rtx expand_mult_add PARAMS ((rtx, rtx, rtx, rtx,enum machine_mode, int)); | |
753 | extern rtx expand_mult_highpart_adjust PARAMS ((enum machine_mode, rtx, rtx, rtx, rtx, int)); | |
e8bbfc4e | 754 | |
711d877c | 755 | extern rtx assemble_static_space PARAMS ((int)); |
e8bbfc4e RK |
756 | |
757 | /* Hook called by expand_expr for language-specific tree codes. | |
758 | It is up to the language front end to install a hook | |
759 | if it has any such codes that expand_expr needs to know about. */ | |
711d877c KG |
760 | extern rtx (*lang_expand_expr) PARAMS ((union tree_node *, rtx, |
761 | enum machine_mode, | |
762 | enum expand_modifier modifier)); | |
b0cb541b | 763 | |
4d49638c | 764 | #ifdef TREE_CODE |
e697e20a MM |
765 | /* Hook called by output_constant for language-specific tree codes. |
766 | It is up to the language front-end to install a hook if it has any | |
767 | such codes that output_constant needs to know about. Returns a | |
768 | language-independent constant equivalent to its input. */ | |
711d877c | 769 | extern tree (*lang_expand_constant) PARAMS ((tree)); |
8f17b5c5 MM |
770 | |
771 | extern int safe_from_p PARAMS ((rtx, tree, int)); | |
772 | ||
773 | /* Hook called by safe_from_p for language-specific tree codes. It is | |
774 | up to the language front-end to install a hook if it has any such | |
775 | codes that safe_from_p needs to know about. Since same_from_p will | |
776 | recursively explore the TREE_OPERANDs of an expression, this hook | |
777 | should not reexamine those pieces. This routine may recursively | |
778 | call safe_from_p; it should always pass `0' as the TOP_P | |
779 | parameter. */ | |
780 | extern int (*lang_safe_from_p) PARAMS ((rtx, tree)); | |
4d49638c | 781 | #endif |
e697e20a | 782 | |
e78d8e51 ZW |
783 | /* Call this once to initialize the contents of the optabs |
784 | appropriately for the current target machine. */ | |
785 | extern void init_optabs PARAMS ((void)); | |
711d877c | 786 | extern void init_all_optabs PARAMS ((void)); |
e78d8e51 ZW |
787 | |
788 | /* Call this to initialize an optab function entry. */ | |
789 | extern rtx init_one_libfunc PARAMS ((const char *)); | |
790 | ||
711d877c KG |
791 | extern void do_jump_by_parts_equality_rtx PARAMS ((rtx, rtx, rtx)); |
792 | extern void do_jump_by_parts_greater_rtx PARAMS ((enum machine_mode, | |
793 | int, rtx, rtx, rtx, | |
794 | rtx)); | |
df03cab5 | 795 | |
0586a4ce | 796 | #ifdef TREE_CODE /* Don't lose if tree.h not included. */ |
711d877c | 797 | extern void mark_seen_cases PARAMS ((tree, unsigned char *, |
770ae6cc | 798 | HOST_WIDE_INT, int)); |
0586a4ce | 799 | #endif |