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3cf2715d | 1 | /* Convert RTL to assembler code and output it, for GNU compiler. |
87e11268 | 2 | Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc. |
3cf2715d DE |
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. */ | |
3cf2715d DE |
20 | |
21 | ||
22 | /* This is the final pass of the compiler. | |
23 | It looks at the rtl code for a function and outputs assembler code. | |
24 | ||
25 | Call `final_start_function' to output the assembler code for function entry, | |
26 | `final' to output assembler code for some RTL code, | |
27 | `final_end_function' to output assembler code for function exit. | |
28 | If a function is compiled in several pieces, each piece is | |
29 | output separately with `final'. | |
30 | ||
31 | Some optimizations are also done at this level. | |
32 | Move instructions that were made unnecessary by good register allocation | |
33 | are detected and omitted from the output. (Though most of these | |
34 | are removed by the last jump pass.) | |
35 | ||
36 | Instructions to set the condition codes are omitted when it can be | |
37 | seen that the condition codes already had the desired values. | |
38 | ||
39 | In some cases it is sufficient if the inherited condition codes | |
40 | have related values, but this may require the following insn | |
41 | (the one that tests the condition codes) to be modified. | |
42 | ||
43 | The code for the function prologue and epilogue are generated | |
44 | directly as assembler code by the macros FUNCTION_PROLOGUE and | |
45 | FUNCTION_EPILOGUE. Those instructions never exist as rtl. */ | |
46 | ||
47 | #include "config.h" | |
670ee920 | 48 | #include "system.h" |
3cf2715d DE |
49 | |
50 | #include "tree.h" | |
51 | #include "rtl.h" | |
52 | #include "regs.h" | |
53 | #include "insn-config.h" | |
54 | #include "insn-flags.h" | |
55 | #include "insn-attr.h" | |
56 | #include "insn-codes.h" | |
57 | #include "recog.h" | |
58 | #include "conditions.h" | |
59 | #include "flags.h" | |
60 | #include "real.h" | |
61 | #include "hard-reg-set.h" | |
62 | #include "defaults.h" | |
63 | #include "output.h" | |
3d195391 | 64 | #include "except.h" |
49ad7cfa | 65 | #include "function.h" |
10f0ad3d | 66 | #include "toplev.h" |
d6f4ec51 | 67 | #include "reload.h" |
ab87f8c8 | 68 | #include "intl.h" |
3cf2715d DE |
69 | |
70 | /* Get N_SLINE and N_SOL from stab.h if we can expect the file to exist. */ | |
71 | #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO) | |
76ead72b | 72 | #include "dbxout.h" |
c7391272 | 73 | #if defined (USG) || !defined (HAVE_STAB_H) |
3cf2715d DE |
74 | #include "gstab.h" /* If doing DBX on sysV, use our own stab.h. */ |
75 | #else | |
9ec36da5 JL |
76 | #include <stab.h> |
77 | #endif | |
78 | ||
3cf2715d DE |
79 | #endif /* DBX_DEBUGGING_INFO || XCOFF_DEBUGGING_INFO */ |
80 | ||
81 | #ifdef XCOFF_DEBUGGING_INFO | |
82 | #include "xcoffout.h" | |
83 | #endif | |
84 | ||
76ead72b RL |
85 | #ifdef DWARF_DEBUGGING_INFO |
86 | #include "dwarfout.h" | |
87 | #endif | |
88 | ||
89 | #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO) | |
90 | #include "dwarf2out.h" | |
91 | #endif | |
92 | ||
93 | #ifdef SDB_DEBUGGING_INFO | |
94 | #include "sdbout.h" | |
95 | #endif | |
96 | ||
3cf2715d DE |
97 | /* .stabd code for line number. */ |
98 | #ifndef N_SLINE | |
99 | #define N_SLINE 0x44 | |
100 | #endif | |
101 | ||
102 | /* .stabs code for included file name. */ | |
103 | #ifndef N_SOL | |
104 | #define N_SOL 0x84 | |
105 | #endif | |
106 | ||
107 | #ifndef INT_TYPE_SIZE | |
108 | #define INT_TYPE_SIZE BITS_PER_WORD | |
109 | #endif | |
110 | ||
9e2f9a7f DE |
111 | #ifndef LONG_TYPE_SIZE |
112 | #define LONG_TYPE_SIZE BITS_PER_WORD | |
113 | #endif | |
114 | ||
3cf2715d DE |
115 | /* If we aren't using cc0, CC_STATUS_INIT shouldn't exist. So define a |
116 | null default for it to save conditionalization later. */ | |
117 | #ifndef CC_STATUS_INIT | |
118 | #define CC_STATUS_INIT | |
119 | #endif | |
120 | ||
121 | /* How to start an assembler comment. */ | |
122 | #ifndef ASM_COMMENT_START | |
123 | #define ASM_COMMENT_START ";#" | |
124 | #endif | |
125 | ||
126 | /* Is the given character a logical line separator for the assembler? */ | |
127 | #ifndef IS_ASM_LOGICAL_LINE_SEPARATOR | |
128 | #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == ';') | |
129 | #endif | |
130 | ||
75197b37 BS |
131 | #ifndef JUMP_TABLES_IN_TEXT_SECTION |
132 | #define JUMP_TABLES_IN_TEXT_SECTION 0 | |
133 | #endif | |
134 | ||
3cf2715d DE |
135 | /* Last insn processed by final_scan_insn. */ |
136 | static rtx debug_insn = 0; | |
137 | ||
138 | /* Line number of last NOTE. */ | |
139 | static int last_linenum; | |
140 | ||
eac40081 RK |
141 | /* Highest line number in current block. */ |
142 | static int high_block_linenum; | |
143 | ||
144 | /* Likewise for function. */ | |
145 | static int high_function_linenum; | |
146 | ||
3cf2715d DE |
147 | /* Filename of last NOTE. */ |
148 | static char *last_filename; | |
149 | ||
150 | /* Number of basic blocks seen so far; | |
151 | used if profile_block_flag is set. */ | |
152 | static int count_basic_blocks; | |
153 | ||
9e2f9a7f DE |
154 | /* Number of instrumented arcs when profile_arc_flag is set. */ |
155 | extern int count_instrumented_arcs; | |
156 | ||
fc470718 R |
157 | extern int length_unit_log; /* This is defined in insn-attrtab.c. */ |
158 | ||
3cf2715d DE |
159 | /* Nonzero while outputting an `asm' with operands. |
160 | This means that inconsistencies are the user's fault, so don't abort. | |
161 | The precise value is the insn being output, to pass to error_for_asm. */ | |
162 | static rtx this_is_asm_operands; | |
163 | ||
164 | /* Number of operands of this insn, for an `asm' with operands. */ | |
22bf4422 | 165 | static unsigned int insn_noperands; |
3cf2715d DE |
166 | |
167 | /* Compare optimization flag. */ | |
168 | ||
169 | static rtx last_ignored_compare = 0; | |
170 | ||
171 | /* Flag indicating this insn is the start of a new basic block. */ | |
172 | ||
173 | static int new_block = 1; | |
174 | ||
175 | /* All the symbol-blocks (levels of scoping) in the compilation | |
176 | are assigned sequence numbers in order of appearance of the | |
177 | beginnings of the symbol-blocks. Both final and dbxout do this, | |
178 | and assume that they will both give the same number to each block. | |
179 | Final uses these sequence numbers to generate assembler label names | |
180 | LBBnnn and LBEnnn for the beginning and end of the symbol-block. | |
181 | Dbxout uses the sequence numbers to generate references to the same labels | |
182 | from the dbx debugging information. | |
183 | ||
184 | Sdb records this level at the beginning of each function, | |
185 | in order to find the current level when recursing down declarations. | |
186 | It outputs the block beginning and endings | |
187 | at the point in the asm file where the blocks would begin and end. */ | |
188 | ||
189 | int next_block_index; | |
190 | ||
191 | /* Assign a unique number to each insn that is output. | |
192 | This can be used to generate unique local labels. */ | |
193 | ||
194 | static int insn_counter = 0; | |
195 | ||
196 | #ifdef HAVE_cc0 | |
197 | /* This variable contains machine-dependent flags (defined in tm.h) | |
198 | set and examined by output routines | |
199 | that describe how to interpret the condition codes properly. */ | |
200 | ||
201 | CC_STATUS cc_status; | |
202 | ||
203 | /* During output of an insn, this contains a copy of cc_status | |
204 | from before the insn. */ | |
205 | ||
206 | CC_STATUS cc_prev_status; | |
207 | #endif | |
208 | ||
209 | /* Indexed by hardware reg number, is 1 if that register is ever | |
210 | used in the current function. | |
211 | ||
212 | In life_analysis, or in stupid_life_analysis, this is set | |
213 | up to record the hard regs used explicitly. Reload adds | |
214 | in the hard regs used for holding pseudo regs. Final uses | |
215 | it to generate the code in the function prologue and epilogue | |
216 | to save and restore registers as needed. */ | |
217 | ||
218 | char regs_ever_live[FIRST_PSEUDO_REGISTER]; | |
219 | ||
220 | /* Nonzero means current function must be given a frame pointer. | |
221 | Set in stmt.c if anything is allocated on the stack there. | |
222 | Set in reload1.c if anything is allocated on the stack there. */ | |
223 | ||
224 | int frame_pointer_needed; | |
225 | ||
226 | /* Assign unique numbers to labels generated for profiling. */ | |
227 | ||
228 | int profile_label_no; | |
229 | ||
230 | /* Length so far allocated in PENDING_BLOCKS. */ | |
231 | ||
232 | static int max_block_depth; | |
233 | ||
234 | /* Stack of sequence numbers of symbol-blocks of which we have seen the | |
235 | beginning but not yet the end. Sequence numbers are assigned at | |
236 | the beginning; this stack allows us to find the sequence number | |
237 | of a block that is ending. */ | |
238 | ||
239 | static int *pending_blocks; | |
240 | ||
241 | /* Number of elements currently in use in PENDING_BLOCKS. */ | |
242 | ||
243 | static int block_depth; | |
244 | ||
245 | /* Nonzero if have enabled APP processing of our assembler output. */ | |
246 | ||
247 | static int app_on; | |
248 | ||
249 | /* If we are outputting an insn sequence, this contains the sequence rtx. | |
250 | Zero otherwise. */ | |
251 | ||
252 | rtx final_sequence; | |
253 | ||
254 | #ifdef ASSEMBLER_DIALECT | |
255 | ||
256 | /* Number of the assembler dialect to use, starting at 0. */ | |
257 | static int dialect_number; | |
258 | #endif | |
259 | ||
260 | /* Indexed by line number, nonzero if there is a note for that line. */ | |
261 | ||
262 | static char *line_note_exists; | |
263 | ||
264 | /* Linked list to hold line numbers for each basic block. */ | |
265 | ||
266 | struct bb_list { | |
267 | struct bb_list *next; /* pointer to next basic block */ | |
268 | int line_num; /* line number */ | |
269 | int file_label_num; /* LPBC<n> label # for stored filename */ | |
270 | int func_label_num; /* LPBC<n> label # for stored function name */ | |
271 | }; | |
272 | ||
273 | static struct bb_list *bb_head = 0; /* Head of basic block list */ | |
274 | static struct bb_list **bb_tail = &bb_head; /* Ptr to store next bb ptr */ | |
275 | static int bb_file_label_num = -1; /* Current label # for file */ | |
276 | static int bb_func_label_num = -1; /* Current label # for func */ | |
277 | ||
278 | /* Linked list to hold the strings for each file and function name output. */ | |
279 | ||
280 | struct bb_str { | |
281 | struct bb_str *next; /* pointer to next string */ | |
9b3142b3 | 282 | const char *string; /* string */ |
3cf2715d DE |
283 | int label_num; /* label number */ |
284 | int length; /* string length */ | |
285 | }; | |
286 | ||
ede7cd44 | 287 | #ifdef HAVE_peephole |
3cf2715d | 288 | extern rtx peephole PROTO((rtx)); |
ede7cd44 | 289 | #endif |
3cf2715d DE |
290 | |
291 | static struct bb_str *sbb_head = 0; /* Head of string list. */ | |
292 | static struct bb_str **sbb_tail = &sbb_head; /* Ptr to store next bb str */ | |
293 | static int sbb_label_num = 0; /* Last label used */ | |
294 | ||
1d300e19 | 295 | #ifdef HAVE_ATTR_length |
3cf2715d | 296 | static int asm_insn_count PROTO((rtx)); |
1d300e19 | 297 | #endif |
3cf2715d DE |
298 | static void profile_function PROTO((FILE *)); |
299 | static void profile_after_prologue PROTO((FILE *)); | |
300 | static void add_bb PROTO((FILE *)); | |
9b3142b3 | 301 | static int add_bb_string PROTO((const char *, int)); |
3cf2715d DE |
302 | static void output_source_line PROTO((FILE *, rtx)); |
303 | static rtx walk_alter_subreg PROTO((rtx)); | |
cb649530 | 304 | static void output_asm_name PROTO((void)); |
3cf2715d | 305 | static void output_operand PROTO((rtx, int)); |
e9a25f70 | 306 | #ifdef LEAF_REGISTERS |
3cf2715d | 307 | static void leaf_renumber_regs PROTO((rtx)); |
e9a25f70 JL |
308 | #endif |
309 | #ifdef HAVE_cc0 | |
310 | static int alter_cond PROTO((rtx)); | |
311 | #endif | |
3cf2715d DE |
312 | \f |
313 | /* Initialize data in final at the beginning of a compilation. */ | |
314 | ||
315 | void | |
316 | init_final (filename) | |
6a651371 | 317 | const char *filename ATTRIBUTE_UNUSED; |
3cf2715d DE |
318 | { |
319 | next_block_index = 2; | |
320 | app_on = 0; | |
321 | max_block_depth = 20; | |
322 | pending_blocks = (int *) xmalloc (20 * sizeof *pending_blocks); | |
323 | final_sequence = 0; | |
324 | ||
325 | #ifdef ASSEMBLER_DIALECT | |
326 | dialect_number = ASSEMBLER_DIALECT; | |
327 | #endif | |
328 | } | |
329 | ||
330 | /* Called at end of source file, | |
331 | to output the block-profiling table for this entire compilation. */ | |
332 | ||
333 | void | |
334 | end_final (filename) | |
87e11268 | 335 | const char *filename; |
3cf2715d DE |
336 | { |
337 | int i; | |
338 | ||
9e2f9a7f | 339 | if (profile_block_flag || profile_arc_flag) |
3cf2715d DE |
340 | { |
341 | char name[20]; | |
342 | int align = exact_log2 (BIGGEST_ALIGNMENT / BITS_PER_UNIT); | |
9e2f9a7f | 343 | int size, rounded; |
3cf2715d DE |
344 | struct bb_list *ptr; |
345 | struct bb_str *sptr; | |
9e2f9a7f DE |
346 | int long_bytes = LONG_TYPE_SIZE / BITS_PER_UNIT; |
347 | int pointer_bytes = POINTER_SIZE / BITS_PER_UNIT; | |
348 | ||
349 | if (profile_block_flag) | |
350 | size = long_bytes * count_basic_blocks; | |
351 | else | |
352 | size = long_bytes * count_instrumented_arcs; | |
353 | rounded = size; | |
3cf2715d DE |
354 | |
355 | rounded += (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1; | |
356 | rounded = (rounded / (BIGGEST_ALIGNMENT / BITS_PER_UNIT) | |
357 | * (BIGGEST_ALIGNMENT / BITS_PER_UNIT)); | |
358 | ||
359 | data_section (); | |
360 | ||
47431dff RK |
361 | /* Output the main header, of 11 words: |
362 | 0: 1 if this file is initialized, else 0. | |
3cf2715d DE |
363 | 1: address of file name (LPBX1). |
364 | 2: address of table of counts (LPBX2). | |
365 | 3: number of counts in the table. | |
366 | 4: always 0, for compatibility with Sun. | |
367 | ||
368 | The following are GNU extensions: | |
369 | ||
370 | 5: address of table of start addrs of basic blocks (LPBX3). | |
371 | 6: Number of bytes in this header. | |
372 | 7: address of table of function names (LPBX4). | |
373 | 8: address of table of line numbers (LPBX5) or 0. | |
47431dff | 374 | 9: address of table of file names (LPBX6) or 0. |
0f41302f | 375 | 10: space reserved for basic block profiling. */ |
3cf2715d DE |
376 | |
377 | ASM_OUTPUT_ALIGN (asm_out_file, align); | |
378 | ||
379 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBX", 0); | |
380 | /* zero word */ | |
9e2f9a7f | 381 | assemble_integer (const0_rtx, long_bytes, 1); |
3cf2715d DE |
382 | |
383 | /* address of filename */ | |
384 | ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 1); | |
38a448ca | 385 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, name), pointer_bytes, 1); |
3cf2715d DE |
386 | |
387 | /* address of count table */ | |
388 | ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 2); | |
38a448ca | 389 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, name), pointer_bytes, 1); |
3cf2715d | 390 | |
9e2f9a7f DE |
391 | /* count of the # of basic blocks or # of instrumented arcs */ |
392 | if (profile_block_flag) | |
393 | assemble_integer (GEN_INT (count_basic_blocks), long_bytes, 1); | |
394 | else | |
395 | assemble_integer (GEN_INT (count_instrumented_arcs), long_bytes, | |
396 | 1); | |
3cf2715d DE |
397 | |
398 | /* zero word (link field) */ | |
9e2f9a7f | 399 | assemble_integer (const0_rtx, pointer_bytes, 1); |
3cf2715d DE |
400 | |
401 | /* address of basic block start address table */ | |
9e2f9a7f DE |
402 | if (profile_block_flag) |
403 | { | |
404 | ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 3); | |
38a448ca | 405 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, name), pointer_bytes, |
9e2f9a7f DE |
406 | 1); |
407 | } | |
408 | else | |
409 | assemble_integer (const0_rtx, pointer_bytes, 1); | |
3cf2715d DE |
410 | |
411 | /* byte count for extended structure. */ | |
d7502074 | 412 | assemble_integer (GEN_INT (11 * UNITS_PER_WORD), long_bytes, 1); |
3cf2715d DE |
413 | |
414 | /* address of function name table */ | |
9e2f9a7f DE |
415 | if (profile_block_flag) |
416 | { | |
417 | ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 4); | |
38a448ca | 418 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, name), pointer_bytes, |
9e2f9a7f DE |
419 | 1); |
420 | } | |
421 | else | |
422 | assemble_integer (const0_rtx, pointer_bytes, 1); | |
3cf2715d DE |
423 | |
424 | /* address of line number and filename tables if debugging. */ | |
9e2f9a7f | 425 | if (write_symbols != NO_DEBUG && profile_block_flag) |
3cf2715d DE |
426 | { |
427 | ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 5); | |
c5c76735 JL |
428 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, name), |
429 | pointer_bytes, 1); | |
3cf2715d | 430 | ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 6); |
c5c76735 JL |
431 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, name), |
432 | pointer_bytes, 1); | |
3cf2715d DE |
433 | } |
434 | else | |
435 | { | |
9e2f9a7f DE |
436 | assemble_integer (const0_rtx, pointer_bytes, 1); |
437 | assemble_integer (const0_rtx, pointer_bytes, 1); | |
3cf2715d DE |
438 | } |
439 | ||
47431dff RK |
440 | /* space for extension ptr (link field) */ |
441 | assemble_integer (const0_rtx, UNITS_PER_WORD, 1); | |
442 | ||
3cf2715d DE |
443 | /* Output the file name changing the suffix to .d for Sun tcov |
444 | compatibility. */ | |
445 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBX", 1); | |
446 | { | |
67e23d2f JW |
447 | char *cwd = getpwd (); |
448 | int len = strlen (filename) + strlen (cwd) + 1; | |
449 | char *data_file = (char *) alloca (len + 4); | |
450 | ||
451 | strcpy (data_file, cwd); | |
452 | strcat (data_file, "/"); | |
453 | strcat (data_file, filename); | |
3cf2715d | 454 | strip_off_ending (data_file, len); |
9e2f9a7f DE |
455 | if (profile_block_flag) |
456 | strcat (data_file, ".d"); | |
457 | else | |
458 | strcat (data_file, ".da"); | |
3cf2715d DE |
459 | assemble_string (data_file, strlen (data_file) + 1); |
460 | } | |
461 | ||
462 | /* Make space for the table of counts. */ | |
2786cbad | 463 | if (size == 0) |
3cf2715d DE |
464 | { |
465 | /* Realign data section. */ | |
466 | ASM_OUTPUT_ALIGN (asm_out_file, align); | |
467 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBX", 2); | |
468 | if (size != 0) | |
469 | assemble_zeros (size); | |
470 | } | |
471 | else | |
472 | { | |
473 | ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 2); | |
474 | #ifdef ASM_OUTPUT_SHARED_LOCAL | |
475 | if (flag_shared_data) | |
476 | ASM_OUTPUT_SHARED_LOCAL (asm_out_file, name, size, rounded); | |
477 | else | |
478 | #endif | |
e9a25f70 JL |
479 | #ifdef ASM_OUTPUT_ALIGNED_DECL_LOCAL |
480 | ASM_OUTPUT_ALIGNED_DECL_LOCAL (asm_out_file, NULL_TREE, name, size, | |
481 | BIGGEST_ALIGNMENT); | |
482 | #else | |
3cf2715d DE |
483 | #ifdef ASM_OUTPUT_ALIGNED_LOCAL |
484 | ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file, name, size, | |
485 | BIGGEST_ALIGNMENT); | |
486 | #else | |
487 | ASM_OUTPUT_LOCAL (asm_out_file, name, size, rounded); | |
e9a25f70 | 488 | #endif |
3cf2715d DE |
489 | #endif |
490 | } | |
491 | ||
492 | /* Output any basic block strings */ | |
9e2f9a7f | 493 | if (profile_block_flag) |
3cf2715d | 494 | { |
9e2f9a7f DE |
495 | readonly_data_section (); |
496 | if (sbb_head) | |
3cf2715d | 497 | { |
9e2f9a7f DE |
498 | ASM_OUTPUT_ALIGN (asm_out_file, align); |
499 | for (sptr = sbb_head; sptr != 0; sptr = sptr->next) | |
500 | { | |
501 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBC", | |
502 | sptr->label_num); | |
503 | assemble_string (sptr->string, sptr->length); | |
504 | } | |
3cf2715d DE |
505 | } |
506 | } | |
507 | ||
508 | /* Output the table of addresses. */ | |
9e2f9a7f | 509 | if (profile_block_flag) |
3cf2715d | 510 | { |
9e2f9a7f DE |
511 | /* Realign in new section */ |
512 | ASM_OUTPUT_ALIGN (asm_out_file, align); | |
513 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBX", 3); | |
514 | for (i = 0; i < count_basic_blocks; i++) | |
515 | { | |
516 | ASM_GENERATE_INTERNAL_LABEL (name, "LPB", i); | |
38a448ca | 517 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, name), |
9e2f9a7f DE |
518 | pointer_bytes, 1); |
519 | } | |
3cf2715d DE |
520 | } |
521 | ||
522 | /* Output the table of function names. */ | |
9e2f9a7f | 523 | if (profile_block_flag) |
3cf2715d | 524 | { |
9e2f9a7f DE |
525 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBX", 4); |
526 | for ((ptr = bb_head), (i = 0); ptr != 0; (ptr = ptr->next), i++) | |
3cf2715d | 527 | { |
9e2f9a7f DE |
528 | if (ptr->func_label_num >= 0) |
529 | { | |
530 | ASM_GENERATE_INTERNAL_LABEL (name, "LPBC", | |
531 | ptr->func_label_num); | |
38a448ca | 532 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, name), |
9e2f9a7f DE |
533 | pointer_bytes, 1); |
534 | } | |
535 | else | |
536 | assemble_integer (const0_rtx, pointer_bytes, 1); | |
3cf2715d | 537 | } |
3cf2715d | 538 | |
9e2f9a7f DE |
539 | for ( ; i < count_basic_blocks; i++) |
540 | assemble_integer (const0_rtx, pointer_bytes, 1); | |
541 | } | |
3cf2715d | 542 | |
9e2f9a7f | 543 | if (write_symbols != NO_DEBUG && profile_block_flag) |
3cf2715d DE |
544 | { |
545 | /* Output the table of line numbers. */ | |
546 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBX", 5); | |
547 | for ((ptr = bb_head), (i = 0); ptr != 0; (ptr = ptr->next), i++) | |
9e2f9a7f | 548 | assemble_integer (GEN_INT (ptr->line_num), long_bytes, 1); |
3cf2715d DE |
549 | |
550 | for ( ; i < count_basic_blocks; i++) | |
9e2f9a7f | 551 | assemble_integer (const0_rtx, long_bytes, 1); |
3cf2715d DE |
552 | |
553 | /* Output the table of file names. */ | |
554 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBX", 6); | |
555 | for ((ptr = bb_head), (i = 0); ptr != 0; (ptr = ptr->next), i++) | |
556 | { | |
557 | if (ptr->file_label_num >= 0) | |
558 | { | |
9e2f9a7f DE |
559 | ASM_GENERATE_INTERNAL_LABEL (name, "LPBC", |
560 | ptr->file_label_num); | |
38a448ca | 561 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, name), |
9e2f9a7f | 562 | pointer_bytes, 1); |
3cf2715d DE |
563 | } |
564 | else | |
9e2f9a7f | 565 | assemble_integer (const0_rtx, pointer_bytes, 1); |
3cf2715d DE |
566 | } |
567 | ||
568 | for ( ; i < count_basic_blocks; i++) | |
9e2f9a7f | 569 | assemble_integer (const0_rtx, pointer_bytes, 1); |
3cf2715d DE |
570 | } |
571 | ||
572 | /* End with the address of the table of addresses, | |
573 | so we can find it easily, as the last word in the file's text. */ | |
9e2f9a7f DE |
574 | if (profile_block_flag) |
575 | { | |
576 | ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 3); | |
38a448ca | 577 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, name), pointer_bytes, |
9e2f9a7f DE |
578 | 1); |
579 | } | |
3cf2715d DE |
580 | } |
581 | } | |
582 | ||
583 | /* Enable APP processing of subsequent output. | |
584 | Used before the output from an `asm' statement. */ | |
585 | ||
586 | void | |
587 | app_enable () | |
588 | { | |
589 | if (! app_on) | |
590 | { | |
51723711 | 591 | fputs (ASM_APP_ON, asm_out_file); |
3cf2715d DE |
592 | app_on = 1; |
593 | } | |
594 | } | |
595 | ||
596 | /* Disable APP processing of subsequent output. | |
597 | Called from varasm.c before most kinds of output. */ | |
598 | ||
599 | void | |
600 | app_disable () | |
601 | { | |
602 | if (app_on) | |
603 | { | |
51723711 | 604 | fputs (ASM_APP_OFF, asm_out_file); |
3cf2715d DE |
605 | app_on = 0; |
606 | } | |
607 | } | |
608 | \f | |
609 | /* Return the number of slots filled in the current | |
610 | delayed branch sequence (we don't count the insn needing the | |
611 | delay slot). Zero if not in a delayed branch sequence. */ | |
612 | ||
613 | #ifdef DELAY_SLOTS | |
614 | int | |
615 | dbr_sequence_length () | |
616 | { | |
617 | if (final_sequence != 0) | |
618 | return XVECLEN (final_sequence, 0) - 1; | |
619 | else | |
620 | return 0; | |
621 | } | |
622 | #endif | |
623 | \f | |
624 | /* The next two pages contain routines used to compute the length of an insn | |
625 | and to shorten branches. */ | |
626 | ||
627 | /* Arrays for insn lengths, and addresses. The latter is referenced by | |
628 | `insn_current_length'. */ | |
629 | ||
630 | static short *insn_lengths; | |
631 | int *insn_addresses; | |
632 | ||
ea3cbda5 R |
633 | /* Max uid for which the above arrays are valid. */ |
634 | static int insn_lengths_max_uid; | |
635 | ||
3cf2715d DE |
636 | /* Address of insn being processed. Used by `insn_current_length'. */ |
637 | int insn_current_address; | |
638 | ||
fc470718 R |
639 | /* Address of insn being processed in previous iteration. */ |
640 | int insn_last_address; | |
641 | ||
642 | /* konwn invariant alignment of insn being processed. */ | |
643 | int insn_current_align; | |
644 | ||
95707627 R |
645 | /* After shorten_branches, for any insn, uid_align[INSN_UID (insn)] |
646 | gives the next following alignment insn that increases the known | |
647 | alignment, or NULL_RTX if there is no such insn. | |
648 | For any alignment obtained this way, we can again index uid_align with | |
649 | its uid to obtain the next following align that in turn increases the | |
650 | alignment, till we reach NULL_RTX; the sequence obtained this way | |
651 | for each insn we'll call the alignment chain of this insn in the following | |
652 | comments. */ | |
653 | ||
9e423e6d JW |
654 | struct label_alignment { |
655 | short alignment; | |
656 | short max_skip; | |
657 | }; | |
658 | ||
659 | static rtx *uid_align; | |
660 | static int *uid_shuid; | |
661 | static struct label_alignment *label_align; | |
95707627 | 662 | |
3cf2715d DE |
663 | /* Indicate that branch shortening hasn't yet been done. */ |
664 | ||
665 | void | |
666 | init_insn_lengths () | |
667 | { | |
95707627 R |
668 | if (label_align) |
669 | { | |
670 | free (label_align); | |
671 | label_align = 0; | |
672 | } | |
673 | if (uid_shuid) | |
674 | { | |
675 | free (uid_shuid); | |
676 | uid_shuid = 0; | |
677 | } | |
678 | if (insn_lengths) | |
679 | { | |
680 | free (insn_lengths); | |
681 | insn_lengths = 0; | |
ea3cbda5 | 682 | insn_lengths_max_uid = 0; |
95707627 R |
683 | } |
684 | if (insn_addresses) | |
685 | { | |
686 | free (insn_addresses); | |
687 | insn_addresses = 0; | |
688 | } | |
689 | if (uid_align) | |
690 | { | |
691 | free (uid_align); | |
692 | uid_align = 0; | |
693 | } | |
3cf2715d DE |
694 | } |
695 | ||
696 | /* Obtain the current length of an insn. If branch shortening has been done, | |
697 | get its actual length. Otherwise, get its maximum length. */ | |
698 | ||
699 | int | |
700 | get_attr_length (insn) | |
701 | rtx insn; | |
702 | { | |
703 | #ifdef HAVE_ATTR_length | |
704 | rtx body; | |
705 | int i; | |
706 | int length = 0; | |
707 | ||
ea3cbda5 | 708 | if (insn_lengths_max_uid > INSN_UID (insn)) |
3cf2715d DE |
709 | return insn_lengths[INSN_UID (insn)]; |
710 | else | |
711 | switch (GET_CODE (insn)) | |
712 | { | |
713 | case NOTE: | |
714 | case BARRIER: | |
715 | case CODE_LABEL: | |
716 | return 0; | |
717 | ||
718 | case CALL_INSN: | |
719 | length = insn_default_length (insn); | |
720 | break; | |
721 | ||
722 | case JUMP_INSN: | |
723 | body = PATTERN (insn); | |
724 | if (GET_CODE (body) == ADDR_VEC || GET_CODE (body) == ADDR_DIFF_VEC) | |
725 | { | |
fc470718 R |
726 | /* Alignment is machine-dependent and should be handled by |
727 | ADDR_VEC_ALIGN. */ | |
3cf2715d DE |
728 | } |
729 | else | |
730 | length = insn_default_length (insn); | |
731 | break; | |
732 | ||
733 | case INSN: | |
734 | body = PATTERN (insn); | |
735 | if (GET_CODE (body) == USE || GET_CODE (body) == CLOBBER) | |
736 | return 0; | |
737 | ||
738 | else if (GET_CODE (body) == ASM_INPUT || asm_noperands (body) >= 0) | |
739 | length = asm_insn_count (body) * insn_default_length (insn); | |
740 | else if (GET_CODE (body) == SEQUENCE) | |
741 | for (i = 0; i < XVECLEN (body, 0); i++) | |
742 | length += get_attr_length (XVECEXP (body, 0, i)); | |
743 | else | |
744 | length = insn_default_length (insn); | |
e9a25f70 JL |
745 | break; |
746 | ||
747 | default: | |
748 | break; | |
3cf2715d DE |
749 | } |
750 | ||
751 | #ifdef ADJUST_INSN_LENGTH | |
752 | ADJUST_INSN_LENGTH (insn, length); | |
753 | #endif | |
754 | return length; | |
755 | #else /* not HAVE_ATTR_length */ | |
756 | return 0; | |
757 | #endif /* not HAVE_ATTR_length */ | |
758 | } | |
759 | \f | |
fc470718 R |
760 | /* Code to handle alignment inside shorten_branches. */ |
761 | ||
762 | /* Here is an explanation how the algorithm in align_fuzz can give | |
763 | proper results: | |
764 | ||
765 | Call a sequence of instructions beginning with alignment point X | |
766 | and continuing until the next alignment point `block X'. When `X' | |
767 | is used in an expression, it means the alignment value of the | |
768 | alignment point. | |
769 | ||
770 | Call the distance between the start of the first insn of block X, and | |
771 | the end of the last insn of block X `IX', for the `inner size of X'. | |
772 | This is clearly the sum of the instruction lengths. | |
773 | ||
774 | Likewise with the next alignment-delimited block following X, which we | |
775 | shall call block Y. | |
776 | ||
777 | Call the distance between the start of the first insn of block X, and | |
778 | the start of the first insn of block Y `OX', for the `outer size of X'. | |
779 | ||
780 | The estimated padding is then OX - IX. | |
781 | ||
782 | OX can be safely estimated as | |
783 | ||
784 | if (X >= Y) | |
785 | OX = round_up(IX, Y) | |
786 | else | |
787 | OX = round_up(IX, X) + Y - X | |
788 | ||
789 | Clearly est(IX) >= real(IX), because that only depends on the | |
790 | instruction lengths, and those being overestimated is a given. | |
791 | ||
792 | Clearly round_up(foo, Z) >= round_up(bar, Z) if foo >= bar, so | |
793 | we needn't worry about that when thinking about OX. | |
794 | ||
795 | When X >= Y, the alignment provided by Y adds no uncertainty factor | |
796 | for branch ranges starting before X, so we can just round what we have. | |
797 | But when X < Y, we don't know anything about the, so to speak, | |
798 | `middle bits', so we have to assume the worst when aligning up from an | |
799 | address mod X to one mod Y, which is Y - X. */ | |
800 | ||
801 | #ifndef LABEL_ALIGN | |
efa3896a | 802 | #define LABEL_ALIGN(LABEL) align_labels_log |
fc470718 R |
803 | #endif |
804 | ||
9e423e6d | 805 | #ifndef LABEL_ALIGN_MAX_SKIP |
efa3896a | 806 | #define LABEL_ALIGN_MAX_SKIP (align_labels-1) |
9e423e6d JW |
807 | #endif |
808 | ||
fc470718 | 809 | #ifndef LOOP_ALIGN |
efa3896a | 810 | #define LOOP_ALIGN(LABEL) align_loops_log |
fc470718 R |
811 | #endif |
812 | ||
9e423e6d | 813 | #ifndef LOOP_ALIGN_MAX_SKIP |
efa3896a | 814 | #define LOOP_ALIGN_MAX_SKIP (align_loops-1) |
9e423e6d JW |
815 | #endif |
816 | ||
fc470718 | 817 | #ifndef LABEL_ALIGN_AFTER_BARRIER |
efa3896a | 818 | #define LABEL_ALIGN_AFTER_BARRIER(LABEL) align_jumps_log |
fc470718 R |
819 | #endif |
820 | ||
9e423e6d | 821 | #ifndef LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP |
efa3896a | 822 | #define LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP (align_jumps-1) |
9e423e6d JW |
823 | #endif |
824 | ||
fc470718 R |
825 | #ifndef ADDR_VEC_ALIGN |
826 | int | |
827 | final_addr_vec_align (addr_vec) | |
828 | rtx addr_vec; | |
829 | { | |
830 | int align = exact_log2 (GET_MODE_SIZE (GET_MODE (PATTERN (addr_vec)))); | |
831 | ||
832 | if (align > BIGGEST_ALIGNMENT / BITS_PER_UNIT) | |
833 | align = BIGGEST_ALIGNMENT / BITS_PER_UNIT; | |
834 | return align; | |
835 | ||
836 | } | |
837 | #define ADDR_VEC_ALIGN(ADDR_VEC) final_addr_vec_align (ADDR_VEC) | |
838 | #endif | |
839 | ||
840 | #ifndef INSN_LENGTH_ALIGNMENT | |
841 | #define INSN_LENGTH_ALIGNMENT(INSN) length_unit_log | |
842 | #endif | |
843 | ||
fc470718 R |
844 | #define INSN_SHUID(INSN) (uid_shuid[INSN_UID (INSN)]) |
845 | ||
de7987a6 | 846 | static int min_labelno, max_labelno; |
fc470718 R |
847 | |
848 | #define LABEL_TO_ALIGNMENT(LABEL) \ | |
9e423e6d JW |
849 | (label_align[CODE_LABEL_NUMBER (LABEL) - min_labelno].alignment) |
850 | ||
851 | #define LABEL_TO_MAX_SKIP(LABEL) \ | |
852 | (label_align[CODE_LABEL_NUMBER (LABEL) - min_labelno].max_skip) | |
fc470718 R |
853 | |
854 | /* For the benefit of port specific code do this also as a function. */ | |
855 | int | |
856 | label_to_alignment (label) | |
857 | rtx label; | |
858 | { | |
859 | return LABEL_TO_ALIGNMENT (label); | |
860 | } | |
861 | ||
862 | #ifdef HAVE_ATTR_length | |
863 | /* The differences in addresses | |
864 | between a branch and its target might grow or shrink depending on | |
865 | the alignment the start insn of the range (the branch for a forward | |
866 | branch or the label for a backward branch) starts out on; if these | |
867 | differences are used naively, they can even oscillate infinitely. | |
868 | We therefore want to compute a 'worst case' address difference that | |
869 | is independent of the alignment the start insn of the range end | |
870 | up on, and that is at least as large as the actual difference. | |
871 | The function align_fuzz calculates the amount we have to add to the | |
872 | naively computed difference, by traversing the part of the alignment | |
873 | chain of the start insn of the range that is in front of the end insn | |
874 | of the range, and considering for each alignment the maximum amount | |
875 | that it might contribute to a size increase. | |
876 | ||
877 | For casesi tables, we also want to know worst case minimum amounts of | |
878 | address difference, in case a machine description wants to introduce | |
879 | some common offset that is added to all offsets in a table. | |
880 | For this purpose, align_fuzz with a growth argument of 0 comuptes the | |
881 | appropriate adjustment. */ | |
882 | ||
883 | ||
884 | /* Compute the maximum delta by which the difference of the addresses of | |
885 | START and END might grow / shrink due to a different address for start | |
886 | which changes the size of alignment insns between START and END. | |
887 | KNOWN_ALIGN_LOG is the alignment known for START. | |
888 | GROWTH should be ~0 if the objective is to compute potential code size | |
889 | increase, and 0 if the objective is to compute potential shrink. | |
890 | The return value is undefined for any other value of GROWTH. */ | |
687d0ab6 R |
891 | int |
892 | align_fuzz (start, end, known_align_log, growth) | |
fc470718 R |
893 | rtx start, end; |
894 | int known_align_log; | |
895 | unsigned growth; | |
896 | { | |
897 | int uid = INSN_UID (start); | |
898 | rtx align_label; | |
899 | int known_align = 1 << known_align_log; | |
900 | int end_shuid = INSN_SHUID (end); | |
901 | int fuzz = 0; | |
902 | ||
903 | for (align_label = uid_align[uid]; align_label; align_label = uid_align[uid]) | |
904 | { | |
905 | int align_addr, new_align; | |
906 | ||
907 | uid = INSN_UID (align_label); | |
908 | align_addr = insn_addresses[uid] - insn_lengths[uid]; | |
909 | if (uid_shuid[uid] > end_shuid) | |
910 | break; | |
911 | known_align_log = LABEL_TO_ALIGNMENT (align_label); | |
912 | new_align = 1 << known_align_log; | |
913 | if (new_align < known_align) | |
914 | continue; | |
915 | fuzz += (-align_addr ^ growth) & (new_align - known_align); | |
916 | known_align = new_align; | |
917 | } | |
918 | return fuzz; | |
919 | } | |
920 | ||
921 | /* Compute a worst-case reference address of a branch so that it | |
922 | can be safely used in the presence of aligned labels. Since the | |
923 | size of the branch itself is unknown, the size of the branch is | |
924 | not included in the range. I.e. for a forward branch, the reference | |
925 | address is the end address of the branch as known from the previous | |
926 | branch shortening pass, minus a value to account for possible size | |
927 | increase due to alignment. For a backward branch, it is the start | |
928 | address of the branch as known from the current pass, plus a value | |
929 | to account for possible size increase due to alignment. | |
930 | NB.: Therefore, the maximum offset allowed for backward branches needs | |
931 | to exclude the branch size. */ | |
932 | int | |
933 | insn_current_reference_address (branch) | |
934 | rtx branch; | |
935 | { | |
936 | rtx dest; | |
937 | rtx seq = NEXT_INSN (PREV_INSN (branch)); | |
938 | int seq_uid = INSN_UID (seq); | |
939 | if (GET_CODE (branch) != JUMP_INSN) | |
940 | /* This can happen for example on the PA; the objective is to know the | |
941 | offset to address something in front of the start of the function. | |
942 | Thus, we can treat it like a backward branch. | |
943 | We assume here that FUNCTION_BOUNDARY / BITS_PER_UNIT is larger than | |
944 | any alignment we'd encounter, so we skip the call to align_fuzz. */ | |
945 | return insn_current_address; | |
946 | dest = JUMP_LABEL (branch); | |
33f7f353 | 947 | /* BRANCH has no proper alignment chain set, so use SEQ. */ |
fc470718 R |
948 | if (INSN_SHUID (branch) < INSN_SHUID (dest)) |
949 | { | |
950 | /* Forward branch. */ | |
951 | return (insn_last_address + insn_lengths[seq_uid] | |
26024475 | 952 | - align_fuzz (seq, dest, length_unit_log, ~0)); |
fc470718 R |
953 | } |
954 | else | |
955 | { | |
956 | /* Backward branch. */ | |
957 | return (insn_current_address | |
923f7cf9 | 958 | + align_fuzz (dest, seq, length_unit_log, ~0)); |
fc470718 R |
959 | } |
960 | } | |
961 | #endif /* HAVE_ATTR_length */ | |
962 | \f | |
3cf2715d DE |
963 | /* Make a pass over all insns and compute their actual lengths by shortening |
964 | any branches of variable length if possible. */ | |
965 | ||
966 | /* Give a default value for the lowest address in a function. */ | |
967 | ||
968 | #ifndef FIRST_INSN_ADDRESS | |
969 | #define FIRST_INSN_ADDRESS 0 | |
970 | #endif | |
971 | ||
fc470718 R |
972 | /* shorten_branches might be called multiple times: for example, the SH |
973 | port splits out-of-range conditional branches in MACHINE_DEPENDENT_REORG. | |
974 | In order to do this, it needs proper length information, which it obtains | |
975 | by calling shorten_branches. This cannot be collapsed with | |
976 | shorten_branches itself into a single pass unless we also want to intergate | |
977 | reorg.c, since the branch splitting exposes new instructions with delay | |
978 | slots. */ | |
979 | ||
3cf2715d DE |
980 | void |
981 | shorten_branches (first) | |
982 | rtx first; | |
983 | { | |
3cf2715d | 984 | rtx insn; |
fc470718 R |
985 | int max_uid; |
986 | int i; | |
fc470718 | 987 | int max_log; |
9e423e6d | 988 | int max_skip; |
fc470718 R |
989 | #ifdef HAVE_ATTR_length |
990 | #define MAX_CODE_ALIGN 16 | |
991 | rtx seq; | |
3cf2715d | 992 | int something_changed = 1; |
3cf2715d DE |
993 | char *varying_length; |
994 | rtx body; | |
995 | int uid; | |
fc470718 | 996 | rtx align_tab[MAX_CODE_ALIGN]; |
3cf2715d | 997 | |
3d14e82f JW |
998 | /* In order to make sure that all instructions have valid length info, |
999 | we must split them before we compute the address/length info. */ | |
1000 | ||
1001 | for (insn = NEXT_INSN (first); insn; insn = NEXT_INSN (insn)) | |
1002 | if (GET_RTX_CLASS (GET_CODE (insn)) == 'i') | |
fc470718 R |
1003 | { |
1004 | rtx old = insn; | |
1b4d9ecd RE |
1005 | /* Don't split the insn if it has been deleted. */ |
1006 | if (! INSN_DELETED_P (old)) | |
1007 | insn = try_split (PATTERN (old), old, 1); | |
fc470718 R |
1008 | /* When not optimizing, the old insn will be still left around |
1009 | with only the 'deleted' bit set. Transform it into a note | |
1010 | to avoid confusion of subsequent processing. */ | |
1011 | if (INSN_DELETED_P (old)) | |
1012 | { | |
1013 | PUT_CODE (old , NOTE); | |
1014 | NOTE_LINE_NUMBER (old) = NOTE_INSN_DELETED; | |
1015 | NOTE_SOURCE_FILE (old) = 0; | |
1016 | } | |
1017 | } | |
1018 | #endif | |
3d14e82f | 1019 | |
fc470718 R |
1020 | /* We must do some computations even when not actually shortening, in |
1021 | order to get the alignment information for the labels. */ | |
1022 | ||
95707627 R |
1023 | init_insn_lengths (); |
1024 | ||
fc470718 R |
1025 | /* Compute maximum UID and allocate label_align / uid_shuid. */ |
1026 | max_uid = get_max_uid (); | |
1027 | ||
1028 | max_labelno = max_label_num (); | |
1029 | min_labelno = get_first_label_num (); | |
d0f3d9c2 | 1030 | label_align = (struct label_alignment *) |
3de90026 | 1031 | xcalloc ((max_labelno - min_labelno + 1), sizeof (struct label_alignment)); |
fc470718 | 1032 | |
fc470718 R |
1033 | uid_shuid = (int *) xmalloc (max_uid * sizeof *uid_shuid); |
1034 | ||
1035 | /* Initialize label_align and set up uid_shuid to be strictly | |
1036 | monotonically rising with insn order. */ | |
e2faec75 R |
1037 | /* We use max_log here to keep track of the maximum alignment we want to |
1038 | impose on the next CODE_LABEL (or the current one if we are processing | |
1039 | the CODE_LABEL itself). */ | |
1040 | ||
9e423e6d JW |
1041 | max_log = 0; |
1042 | max_skip = 0; | |
1043 | ||
1044 | for (insn = get_insns (), i = 1; insn; insn = NEXT_INSN (insn)) | |
fc470718 R |
1045 | { |
1046 | int log; | |
1047 | ||
1048 | INSN_SHUID (insn) = i++; | |
1049 | if (GET_RTX_CLASS (GET_CODE (insn)) == 'i') | |
e2faec75 R |
1050 | { |
1051 | /* reorg might make the first insn of a loop being run once only, | |
1052 | and delete the label in front of it. Then we want to apply | |
1053 | the loop alignment to the new label created by reorg, which | |
1054 | is separated by the former loop start insn from the | |
1055 | NOTE_INSN_LOOP_BEG. */ | |
1056 | } | |
fc470718 R |
1057 | else if (GET_CODE (insn) == CODE_LABEL) |
1058 | { | |
1059 | rtx next; | |
1060 | ||
1061 | log = LABEL_ALIGN (insn); | |
1062 | if (max_log < log) | |
9e423e6d JW |
1063 | { |
1064 | max_log = log; | |
1065 | max_skip = LABEL_ALIGN_MAX_SKIP; | |
1066 | } | |
fc470718 | 1067 | next = NEXT_INSN (insn); |
75197b37 BS |
1068 | /* ADDR_VECs only take room if read-only data goes into the text |
1069 | section. */ | |
1070 | if (JUMP_TABLES_IN_TEXT_SECTION | |
1071 | #if !defined(READONLY_DATA_SECTION) | |
1072 | || 1 | |
fc470718 | 1073 | #endif |
75197b37 BS |
1074 | ) |
1075 | if (next && GET_CODE (next) == JUMP_INSN) | |
1076 | { | |
1077 | rtx nextbody = PATTERN (next); | |
1078 | if (GET_CODE (nextbody) == ADDR_VEC | |
1079 | || GET_CODE (nextbody) == ADDR_DIFF_VEC) | |
1080 | { | |
1081 | log = ADDR_VEC_ALIGN (next); | |
1082 | if (max_log < log) | |
1083 | { | |
1084 | max_log = log; | |
1085 | max_skip = LABEL_ALIGN_MAX_SKIP; | |
1086 | } | |
1087 | } | |
1088 | } | |
fc470718 | 1089 | LABEL_TO_ALIGNMENT (insn) = max_log; |
9e423e6d | 1090 | LABEL_TO_MAX_SKIP (insn) = max_skip; |
fc470718 | 1091 | max_log = 0; |
9e423e6d | 1092 | max_skip = 0; |
fc470718 R |
1093 | } |
1094 | else if (GET_CODE (insn) == BARRIER) | |
1095 | { | |
1096 | rtx label; | |
1097 | ||
1098 | for (label = insn; label && GET_RTX_CLASS (GET_CODE (label)) != 'i'; | |
1099 | label = NEXT_INSN (label)) | |
1100 | if (GET_CODE (label) == CODE_LABEL) | |
1101 | { | |
1102 | log = LABEL_ALIGN_AFTER_BARRIER (insn); | |
1103 | if (max_log < log) | |
9e423e6d JW |
1104 | { |
1105 | max_log = log; | |
1106 | max_skip = LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP; | |
1107 | } | |
fc470718 R |
1108 | break; |
1109 | } | |
1110 | } | |
e2faec75 R |
1111 | /* Again, we allow NOTE_INSN_LOOP_BEG - INSN - CODE_LABEL |
1112 | sequences in order to handle reorg output efficiently. */ | |
fc470718 R |
1113 | else if (GET_CODE (insn) == NOTE |
1114 | && NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_BEG) | |
1115 | { | |
1116 | rtx label; | |
edd6ede7 | 1117 | int nest = 0; |
fc470718 | 1118 | |
edd6ede7 R |
1119 | /* Search for the label that starts the loop. |
1120 | Don't skip past the end of the loop, since that could | |
1121 | lead to putting an alignment where it does not belong. | |
1122 | However, a label after a nested (non-)loop would be OK. */ | |
e2faec75 | 1123 | for (label = insn; label; label = NEXT_INSN (label)) |
edd6ede7 R |
1124 | { |
1125 | if (GET_CODE (label) == NOTE | |
1126 | && NOTE_LINE_NUMBER (label) == NOTE_INSN_LOOP_BEG) | |
1127 | nest++; | |
1128 | else if (GET_CODE (label) == NOTE | |
1129 | && NOTE_LINE_NUMBER (label) == NOTE_INSN_LOOP_END | |
1130 | && --nest == 0) | |
fc470718 | 1131 | break; |
edd6ede7 R |
1132 | else if (GET_CODE (label) == CODE_LABEL) |
1133 | { | |
1134 | log = LOOP_ALIGN (insn); | |
1135 | if (max_log < log) | |
1136 | { | |
1137 | max_log = log; | |
1138 | max_skip = LOOP_ALIGN_MAX_SKIP; | |
1139 | } | |
1140 | break; | |
1141 | } | |
1142 | } | |
fc470718 R |
1143 | } |
1144 | else | |
1145 | continue; | |
1146 | } | |
1147 | #ifdef HAVE_ATTR_length | |
1148 | ||
1149 | /* Allocate the rest of the arrays. */ | |
fc470718 | 1150 | insn_lengths = (short *) xmalloc (max_uid * sizeof (short)); |
ea3cbda5 | 1151 | insn_lengths_max_uid = max_uid; |
af035616 R |
1152 | /* Syntax errors can lead to labels being outside of the main insn stream. |
1153 | Initialize insn_addresses, so that we get reproducible results. */ | |
3de90026 | 1154 | insn_addresses = (int *) xcalloc (max_uid, sizeof (int)); |
fc470718 | 1155 | |
3de90026 | 1156 | varying_length = (char *) xcalloc (max_uid, sizeof (char)); |
fc470718 R |
1157 | |
1158 | /* Initialize uid_align. We scan instructions | |
1159 | from end to start, and keep in align_tab[n] the last seen insn | |
1160 | that does an alignment of at least n+1, i.e. the successor | |
1161 | in the alignment chain for an insn that does / has a known | |
1162 | alignment of n. */ | |
3de90026 | 1163 | uid_align = (rtx *) xcalloc (max_uid, sizeof *uid_align); |
fc470718 R |
1164 | |
1165 | for (i = MAX_CODE_ALIGN; --i >= 0; ) | |
1166 | align_tab[i] = NULL_RTX; | |
1167 | seq = get_last_insn (); | |
33f7f353 | 1168 | for (; seq; seq = PREV_INSN (seq)) |
fc470718 R |
1169 | { |
1170 | int uid = INSN_UID (seq); | |
1171 | int log; | |
fc470718 R |
1172 | log = (GET_CODE (seq) == CODE_LABEL ? LABEL_TO_ALIGNMENT (seq) : 0); |
1173 | uid_align[uid] = align_tab[0]; | |
fc470718 R |
1174 | if (log) |
1175 | { | |
1176 | /* Found an alignment label. */ | |
1177 | uid_align[uid] = align_tab[log]; | |
1178 | for (i = log - 1; i >= 0; i--) | |
1179 | align_tab[i] = seq; | |
1180 | } | |
33f7f353 JR |
1181 | } |
1182 | #ifdef CASE_VECTOR_SHORTEN_MODE | |
1183 | if (optimize) | |
1184 | { | |
1185 | /* Look for ADDR_DIFF_VECs, and initialize their minimum and maximum | |
1186 | label fields. */ | |
1187 | ||
1188 | int min_shuid = INSN_SHUID (get_insns ()) - 1; | |
1189 | int max_shuid = INSN_SHUID (get_last_insn ()) + 1; | |
1190 | int rel; | |
1191 | ||
1192 | for (insn = first; insn != 0; insn = NEXT_INSN (insn)) | |
fc470718 | 1193 | { |
33f7f353 JR |
1194 | rtx min_lab = NULL_RTX, max_lab = NULL_RTX, pat; |
1195 | int len, i, min, max, insn_shuid; | |
1196 | int min_align; | |
1197 | addr_diff_vec_flags flags; | |
1198 | ||
1199 | if (GET_CODE (insn) != JUMP_INSN | |
1200 | || GET_CODE (PATTERN (insn)) != ADDR_DIFF_VEC) | |
1201 | continue; | |
1202 | pat = PATTERN (insn); | |
1203 | len = XVECLEN (pat, 1); | |
1204 | if (len <= 0) | |
1205 | abort (); | |
1206 | min_align = MAX_CODE_ALIGN; | |
1207 | for (min = max_shuid, max = min_shuid, i = len - 1; i >= 0; i--) | |
1208 | { | |
1209 | rtx lab = XEXP (XVECEXP (pat, 1, i), 0); | |
1210 | int shuid = INSN_SHUID (lab); | |
1211 | if (shuid < min) | |
1212 | { | |
1213 | min = shuid; | |
1214 | min_lab = lab; | |
1215 | } | |
1216 | if (shuid > max) | |
1217 | { | |
1218 | max = shuid; | |
1219 | max_lab = lab; | |
1220 | } | |
1221 | if (min_align > LABEL_TO_ALIGNMENT (lab)) | |
1222 | min_align = LABEL_TO_ALIGNMENT (lab); | |
1223 | } | |
1224 | XEXP (pat, 2) = gen_rtx_LABEL_REF (VOIDmode, min_lab); | |
1225 | XEXP (pat, 3) = gen_rtx_LABEL_REF (VOIDmode, max_lab); | |
1226 | insn_shuid = INSN_SHUID (insn); | |
1227 | rel = INSN_SHUID (XEXP (XEXP (pat, 0), 0)); | |
1228 | flags.min_align = min_align; | |
1229 | flags.base_after_vec = rel > insn_shuid; | |
1230 | flags.min_after_vec = min > insn_shuid; | |
1231 | flags.max_after_vec = max > insn_shuid; | |
1232 | flags.min_after_base = min > rel; | |
1233 | flags.max_after_base = max > rel; | |
1234 | ADDR_DIFF_VEC_FLAGS (pat) = flags; | |
fc470718 R |
1235 | } |
1236 | } | |
33f7f353 | 1237 | #endif /* CASE_VECTOR_SHORTEN_MODE */ |
3cf2715d | 1238 | |
3cf2715d DE |
1239 | |
1240 | /* Compute initial lengths, addresses, and varying flags for each insn. */ | |
1241 | for (insn_current_address = FIRST_INSN_ADDRESS, insn = first; | |
1242 | insn != 0; | |
1243 | insn_current_address += insn_lengths[uid], insn = NEXT_INSN (insn)) | |
1244 | { | |
1245 | uid = INSN_UID (insn); | |
fc470718 | 1246 | |
3cf2715d | 1247 | insn_lengths[uid] = 0; |
fc470718 R |
1248 | |
1249 | if (GET_CODE (insn) == CODE_LABEL) | |
1250 | { | |
1251 | int log = LABEL_TO_ALIGNMENT (insn); | |
1252 | if (log) | |
1253 | { | |
1254 | int align = 1 << log; | |
ecb06768 | 1255 | int new_address = (insn_current_address + align - 1) & -align; |
fc470718 R |
1256 | insn_lengths[uid] = new_address - insn_current_address; |
1257 | insn_current_address = new_address; | |
1258 | } | |
1259 | } | |
1260 | ||
1261 | insn_addresses[uid] = insn_current_address; | |
3cf2715d DE |
1262 | |
1263 | if (GET_CODE (insn) == NOTE || GET_CODE (insn) == BARRIER | |
1264 | || GET_CODE (insn) == CODE_LABEL) | |
1265 | continue; | |
04da53bd R |
1266 | if (INSN_DELETED_P (insn)) |
1267 | continue; | |
3cf2715d DE |
1268 | |
1269 | body = PATTERN (insn); | |
1270 | if (GET_CODE (body) == ADDR_VEC || GET_CODE (body) == ADDR_DIFF_VEC) | |
5a32a90c JR |
1271 | { |
1272 | /* This only takes room if read-only data goes into the text | |
1273 | section. */ | |
75197b37 BS |
1274 | if (JUMP_TABLES_IN_TEXT_SECTION |
1275 | #if !defined(READONLY_DATA_SECTION) | |
1276 | || 1 | |
1277 | #endif | |
1278 | ) | |
1279 | insn_lengths[uid] = (XVECLEN (body, | |
1280 | GET_CODE (body) == ADDR_DIFF_VEC) | |
1281 | * GET_MODE_SIZE (GET_MODE (body))); | |
5a32a90c | 1282 | /* Alignment is handled by ADDR_VEC_ALIGN. */ |
5a32a90c | 1283 | } |
3cf2715d DE |
1284 | else if (asm_noperands (body) >= 0) |
1285 | insn_lengths[uid] = asm_insn_count (body) * insn_default_length (insn); | |
1286 | else if (GET_CODE (body) == SEQUENCE) | |
1287 | { | |
1288 | int i; | |
1289 | int const_delay_slots; | |
1290 | #ifdef DELAY_SLOTS | |
1291 | const_delay_slots = const_num_delay_slots (XVECEXP (body, 0, 0)); | |
1292 | #else | |
1293 | const_delay_slots = 0; | |
1294 | #endif | |
1295 | /* Inside a delay slot sequence, we do not do any branch shortening | |
1296 | if the shortening could change the number of delay slots | |
0f41302f | 1297 | of the branch. */ |
3cf2715d DE |
1298 | for (i = 0; i < XVECLEN (body, 0); i++) |
1299 | { | |
1300 | rtx inner_insn = XVECEXP (body, 0, i); | |
1301 | int inner_uid = INSN_UID (inner_insn); | |
1302 | int inner_length; | |
1303 | ||
1304 | if (asm_noperands (PATTERN (XVECEXP (body, 0, i))) >= 0) | |
1305 | inner_length = (asm_insn_count (PATTERN (inner_insn)) | |
1306 | * insn_default_length (inner_insn)); | |
1307 | else | |
1308 | inner_length = insn_default_length (inner_insn); | |
1309 | ||
1310 | insn_lengths[inner_uid] = inner_length; | |
1311 | if (const_delay_slots) | |
1312 | { | |
1313 | if ((varying_length[inner_uid] | |
1314 | = insn_variable_length_p (inner_insn)) != 0) | |
1315 | varying_length[uid] = 1; | |
1316 | insn_addresses[inner_uid] = (insn_current_address + | |
1317 | insn_lengths[uid]); | |
1318 | } | |
1319 | else | |
1320 | varying_length[inner_uid] = 0; | |
1321 | insn_lengths[uid] += inner_length; | |
1322 | } | |
1323 | } | |
1324 | else if (GET_CODE (body) != USE && GET_CODE (body) != CLOBBER) | |
1325 | { | |
1326 | insn_lengths[uid] = insn_default_length (insn); | |
1327 | varying_length[uid] = insn_variable_length_p (insn); | |
1328 | } | |
1329 | ||
1330 | /* If needed, do any adjustment. */ | |
1331 | #ifdef ADJUST_INSN_LENGTH | |
1332 | ADJUST_INSN_LENGTH (insn, insn_lengths[uid]); | |
04b6000c VM |
1333 | if (insn_lengths[uid] < 0) |
1334 | fatal_insn ("Negative insn length", insn); | |
3cf2715d DE |
1335 | #endif |
1336 | } | |
1337 | ||
1338 | /* Now loop over all the insns finding varying length insns. For each, | |
1339 | get the current insn length. If it has changed, reflect the change. | |
1340 | When nothing changes for a full pass, we are done. */ | |
1341 | ||
1342 | while (something_changed) | |
1343 | { | |
1344 | something_changed = 0; | |
fc470718 | 1345 | insn_current_align = MAX_CODE_ALIGN - 1; |
3cf2715d DE |
1346 | for (insn_current_address = FIRST_INSN_ADDRESS, insn = first; |
1347 | insn != 0; | |
1348 | insn = NEXT_INSN (insn)) | |
1349 | { | |
1350 | int new_length; | |
b729186a | 1351 | #ifdef ADJUST_INSN_LENGTH |
3cf2715d | 1352 | int tmp_length; |
b729186a | 1353 | #endif |
fc470718 | 1354 | int length_align; |
3cf2715d DE |
1355 | |
1356 | uid = INSN_UID (insn); | |
fc470718 R |
1357 | |
1358 | if (GET_CODE (insn) == CODE_LABEL) | |
1359 | { | |
1360 | int log = LABEL_TO_ALIGNMENT (insn); | |
1361 | if (log > insn_current_align) | |
1362 | { | |
1363 | int align = 1 << log; | |
ecb06768 | 1364 | int new_address= (insn_current_address + align - 1) & -align; |
fc470718 R |
1365 | insn_lengths[uid] = new_address - insn_current_address; |
1366 | insn_current_align = log; | |
1367 | insn_current_address = new_address; | |
1368 | } | |
1369 | else | |
1370 | insn_lengths[uid] = 0; | |
1371 | insn_addresses[uid] = insn_current_address; | |
1372 | continue; | |
1373 | } | |
1374 | ||
1375 | length_align = INSN_LENGTH_ALIGNMENT (insn); | |
1376 | if (length_align < insn_current_align) | |
1377 | insn_current_align = length_align; | |
1378 | ||
1379 | insn_last_address = insn_addresses[uid]; | |
3cf2715d | 1380 | insn_addresses[uid] = insn_current_address; |
fc470718 | 1381 | |
5e75ef4a | 1382 | #ifdef CASE_VECTOR_SHORTEN_MODE |
33f7f353 JR |
1383 | if (optimize && GET_CODE (insn) == JUMP_INSN |
1384 | && GET_CODE (PATTERN (insn)) == ADDR_DIFF_VEC) | |
1385 | { | |
33f7f353 JR |
1386 | rtx body = PATTERN (insn); |
1387 | int old_length = insn_lengths[uid]; | |
1388 | rtx rel_lab = XEXP (XEXP (body, 0), 0); | |
1389 | rtx min_lab = XEXP (XEXP (body, 2), 0); | |
1390 | rtx max_lab = XEXP (XEXP (body, 3), 0); | |
1391 | addr_diff_vec_flags flags = ADDR_DIFF_VEC_FLAGS (body); | |
1392 | int rel_addr = insn_addresses[INSN_UID (rel_lab)]; | |
1393 | int min_addr = insn_addresses[INSN_UID (min_lab)]; | |
1394 | int max_addr = insn_addresses[INSN_UID (max_lab)]; | |
1395 | rtx prev; | |
1396 | int rel_align = 0; | |
1397 | ||
1398 | /* Try to find a known alignment for rel_lab. */ | |
1399 | for (prev = rel_lab; | |
1400 | prev | |
1401 | && ! insn_lengths[INSN_UID (prev)] | |
1402 | && ! (varying_length[INSN_UID (prev)] & 1); | |
1403 | prev = PREV_INSN (prev)) | |
1404 | if (varying_length[INSN_UID (prev)] & 2) | |
1405 | { | |
1406 | rel_align = LABEL_TO_ALIGNMENT (prev); | |
1407 | break; | |
1408 | } | |
1409 | ||
1410 | /* See the comment on addr_diff_vec_flags in rtl.h for the | |
1411 | meaning of the flags values. base: REL_LAB vec: INSN */ | |
1412 | /* Anything after INSN has still addresses from the last | |
1413 | pass; adjust these so that they reflect our current | |
1414 | estimate for this pass. */ | |
1415 | if (flags.base_after_vec) | |
1416 | rel_addr += insn_current_address - insn_last_address; | |
1417 | if (flags.min_after_vec) | |
1418 | min_addr += insn_current_address - insn_last_address; | |
1419 | if (flags.max_after_vec) | |
1420 | max_addr += insn_current_address - insn_last_address; | |
1421 | /* We want to know the worst case, i.e. lowest possible value | |
1422 | for the offset of MIN_LAB. If MIN_LAB is after REL_LAB, | |
1423 | its offset is positive, and we have to be wary of code shrink; | |
1424 | otherwise, it is negative, and we have to be vary of code | |
1425 | size increase. */ | |
1426 | if (flags.min_after_base) | |
1427 | { | |
1428 | /* If INSN is between REL_LAB and MIN_LAB, the size | |
1429 | changes we are about to make can change the alignment | |
1430 | within the observed offset, therefore we have to break | |
1431 | it up into two parts that are independent. */ | |
1432 | if (! flags.base_after_vec && flags.min_after_vec) | |
1433 | { | |
1434 | min_addr -= align_fuzz (rel_lab, insn, rel_align, 0); | |
1435 | min_addr -= align_fuzz (insn, min_lab, 0, 0); | |
1436 | } | |
1437 | else | |
1438 | min_addr -= align_fuzz (rel_lab, min_lab, rel_align, 0); | |
1439 | } | |
1440 | else | |
1441 | { | |
1442 | if (flags.base_after_vec && ! flags.min_after_vec) | |
1443 | { | |
1444 | min_addr -= align_fuzz (min_lab, insn, 0, ~0); | |
1445 | min_addr -= align_fuzz (insn, rel_lab, 0, ~0); | |
1446 | } | |
1447 | else | |
1448 | min_addr -= align_fuzz (min_lab, rel_lab, 0, ~0); | |
1449 | } | |
1450 | /* Likewise, determine the highest lowest possible value | |
1451 | for the offset of MAX_LAB. */ | |
1452 | if (flags.max_after_base) | |
1453 | { | |
1454 | if (! flags.base_after_vec && flags.max_after_vec) | |
1455 | { | |
1456 | max_addr += align_fuzz (rel_lab, insn, rel_align, ~0); | |
1457 | max_addr += align_fuzz (insn, max_lab, 0, ~0); | |
1458 | } | |
1459 | else | |
1460 | max_addr += align_fuzz (rel_lab, max_lab, rel_align, ~0); | |
1461 | } | |
1462 | else | |
1463 | { | |
1464 | if (flags.base_after_vec && ! flags.max_after_vec) | |
1465 | { | |
1466 | max_addr += align_fuzz (max_lab, insn, 0, 0); | |
1467 | max_addr += align_fuzz (insn, rel_lab, 0, 0); | |
1468 | } | |
1469 | else | |
1470 | max_addr += align_fuzz (max_lab, rel_lab, 0, 0); | |
1471 | } | |
1472 | PUT_MODE (body, CASE_VECTOR_SHORTEN_MODE (min_addr - rel_addr, | |
1473 | max_addr - rel_addr, | |
1474 | body)); | |
75197b37 BS |
1475 | if (JUMP_TABLES_IN_TEXT_SECTION |
1476 | #if !defined(READONLY_DATA_SECTION) | |
1477 | || 1 | |
33f7f353 | 1478 | #endif |
75197b37 BS |
1479 | ) |
1480 | { | |
1481 | insn_lengths[uid] | |
1482 | = (XVECLEN (body, 1) * GET_MODE_SIZE (GET_MODE (body))); | |
1483 | insn_current_address += insn_lengths[uid]; | |
1484 | if (insn_lengths[uid] != old_length) | |
1485 | something_changed = 1; | |
1486 | } | |
1487 | ||
33f7f353 | 1488 | continue; |
33f7f353 | 1489 | } |
5e75ef4a JL |
1490 | #endif /* CASE_VECTOR_SHORTEN_MODE */ |
1491 | ||
1492 | if (! (varying_length[uid])) | |
3cf2715d DE |
1493 | { |
1494 | insn_current_address += insn_lengths[uid]; | |
1495 | continue; | |
1496 | } | |
1497 | if (GET_CODE (insn) == INSN && GET_CODE (PATTERN (insn)) == SEQUENCE) | |
1498 | { | |
1499 | int i; | |
1500 | ||
1501 | body = PATTERN (insn); | |
1502 | new_length = 0; | |
1503 | for (i = 0; i < XVECLEN (body, 0); i++) | |
1504 | { | |
1505 | rtx inner_insn = XVECEXP (body, 0, i); | |
1506 | int inner_uid = INSN_UID (inner_insn); | |
1507 | int inner_length; | |
1508 | ||
1509 | insn_addresses[inner_uid] = insn_current_address; | |
1510 | ||
1511 | /* insn_current_length returns 0 for insns with a | |
1512 | non-varying length. */ | |
1513 | if (! varying_length[inner_uid]) | |
1514 | inner_length = insn_lengths[inner_uid]; | |
1515 | else | |
1516 | inner_length = insn_current_length (inner_insn); | |
1517 | ||
1518 | if (inner_length != insn_lengths[inner_uid]) | |
1519 | { | |
1520 | insn_lengths[inner_uid] = inner_length; | |
1521 | something_changed = 1; | |
1522 | } | |
1523 | insn_current_address += insn_lengths[inner_uid]; | |
1524 | new_length += inner_length; | |
1525 | } | |
1526 | } | |
1527 | else | |
1528 | { | |
1529 | new_length = insn_current_length (insn); | |
1530 | insn_current_address += new_length; | |
1531 | } | |
1532 | ||
3cf2715d DE |
1533 | #ifdef ADJUST_INSN_LENGTH |
1534 | /* If needed, do any adjustment. */ | |
1535 | tmp_length = new_length; | |
1536 | ADJUST_INSN_LENGTH (insn, new_length); | |
1537 | insn_current_address += (new_length - tmp_length); | |
3cf2715d DE |
1538 | #endif |
1539 | ||
1540 | if (new_length != insn_lengths[uid]) | |
1541 | { | |
1542 | insn_lengths[uid] = new_length; | |
1543 | something_changed = 1; | |
1544 | } | |
1545 | } | |
bb4aaf18 TG |
1546 | /* For a non-optimizing compile, do only a single pass. */ |
1547 | if (!optimize) | |
1548 | break; | |
3cf2715d | 1549 | } |
fc470718 R |
1550 | |
1551 | free (varying_length); | |
1552 | ||
3cf2715d DE |
1553 | #endif /* HAVE_ATTR_length */ |
1554 | } | |
1555 | ||
1556 | #ifdef HAVE_ATTR_length | |
1557 | /* Given the body of an INSN known to be generated by an ASM statement, return | |
1558 | the number of machine instructions likely to be generated for this insn. | |
1559 | This is used to compute its length. */ | |
1560 | ||
1561 | static int | |
1562 | asm_insn_count (body) | |
1563 | rtx body; | |
1564 | { | |
1565 | char *template; | |
1566 | int count = 1; | |
1567 | ||
5d0930ea DE |
1568 | if (GET_CODE (body) == ASM_INPUT) |
1569 | template = XSTR (body, 0); | |
1570 | else | |
1571 | template = decode_asm_operands (body, NULL_PTR, NULL_PTR, | |
1572 | NULL_PTR, NULL_PTR); | |
1573 | ||
1574 | for ( ; *template; template++) | |
3cf2715d DE |
1575 | if (IS_ASM_LOGICAL_LINE_SEPARATOR(*template) || *template == '\n') |
1576 | count++; | |
1577 | ||
1578 | return count; | |
1579 | } | |
1580 | #endif | |
1581 | \f | |
1582 | /* Output assembler code for the start of a function, | |
1583 | and initialize some of the variables in this file | |
1584 | for the new function. The label for the function and associated | |
1585 | assembler pseudo-ops have already been output in `assemble_start_function'. | |
1586 | ||
1587 | FIRST is the first insn of the rtl for the function being compiled. | |
1588 | FILE is the file to write assembler code to. | |
1589 | OPTIMIZE is nonzero if we should eliminate redundant | |
1590 | test and compare insns. */ | |
1591 | ||
1592 | void | |
1593 | final_start_function (first, file, optimize) | |
1594 | rtx first; | |
1595 | FILE *file; | |
6a651371 | 1596 | int optimize ATTRIBUTE_UNUSED; |
3cf2715d DE |
1597 | { |
1598 | block_depth = 0; | |
1599 | ||
1600 | this_is_asm_operands = 0; | |
1601 | ||
1602 | #ifdef NON_SAVING_SETJMP | |
1603 | /* A function that calls setjmp should save and restore all the | |
1604 | call-saved registers on a system where longjmp clobbers them. */ | |
1605 | if (NON_SAVING_SETJMP && current_function_calls_setjmp) | |
1606 | { | |
1607 | int i; | |
1608 | ||
1609 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
252f342a | 1610 | if (!call_used_regs[i]) |
3cf2715d DE |
1611 | regs_ever_live[i] = 1; |
1612 | } | |
1613 | #endif | |
1614 | ||
1615 | /* Initial line number is supposed to be output | |
1616 | before the function's prologue and label | |
1617 | so that the function's address will not appear to be | |
1618 | in the last statement of the preceding function. */ | |
1619 | if (NOTE_LINE_NUMBER (first) != NOTE_INSN_DELETED) | |
5fad6898 RK |
1620 | last_linenum = high_block_linenum = high_function_linenum |
1621 | = NOTE_LINE_NUMBER (first); | |
eac40081 | 1622 | |
c5cec899 | 1623 | #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO) |
d291dd49 | 1624 | /* Output DWARF definition of the function. */ |
0021b564 | 1625 | if (dwarf2out_do_frame ()) |
9a666dda | 1626 | dwarf2out_begin_prologue (); |
d291dd49 JM |
1627 | #endif |
1628 | ||
5fad6898 RK |
1629 | /* For SDB and XCOFF, the function beginning must be marked between |
1630 | the function label and the prologue. We always need this, even when | |
3c734272 | 1631 | -g1 was used. Defer on MIPS systems so that parameter descriptions |
0f41302f | 1632 | follow function entry. */ |
3c734272 | 1633 | #if defined(SDB_DEBUGGING_INFO) && !defined(MIPS_DEBUGGING_INFO) |
5fad6898 RK |
1634 | if (write_symbols == SDB_DEBUG) |
1635 | sdbout_begin_function (last_linenum); | |
1636 | else | |
2e2bbce2 | 1637 | #endif |
3cf2715d | 1638 | #ifdef XCOFF_DEBUGGING_INFO |
5fad6898 RK |
1639 | if (write_symbols == XCOFF_DEBUG) |
1640 | xcoffout_begin_function (file, last_linenum); | |
1641 | else | |
3cf2715d | 1642 | #endif |
5fad6898 RK |
1643 | /* But only output line number for other debug info types if -g2 |
1644 | or better. */ | |
1645 | if (NOTE_LINE_NUMBER (first) != NOTE_INSN_DELETED) | |
1646 | output_source_line (file, first); | |
3cf2715d DE |
1647 | |
1648 | #ifdef LEAF_REG_REMAP | |
54ff41b7 | 1649 | if (current_function_uses_only_leaf_regs) |
3cf2715d DE |
1650 | leaf_renumber_regs (first); |
1651 | #endif | |
1652 | ||
1653 | /* The Sun386i and perhaps other machines don't work right | |
1654 | if the profiling code comes after the prologue. */ | |
1655 | #ifdef PROFILE_BEFORE_PROLOGUE | |
1656 | if (profile_flag) | |
1657 | profile_function (file); | |
1658 | #endif /* PROFILE_BEFORE_PROLOGUE */ | |
1659 | ||
0021b564 JM |
1660 | #if defined (DWARF2_UNWIND_INFO) && defined (HAVE_prologue) |
1661 | if (dwarf2out_do_frame ()) | |
1662 | dwarf2out_frame_debug (NULL_RTX); | |
1663 | #endif | |
1664 | ||
3cf2715d DE |
1665 | #ifdef FUNCTION_PROLOGUE |
1666 | /* First output the function prologue: code to set up the stack frame. */ | |
1667 | FUNCTION_PROLOGUE (file, get_frame_size ()); | |
1668 | #endif | |
1669 | ||
1670 | #if defined (SDB_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO) | |
1671 | if (write_symbols == SDB_DEBUG || write_symbols == XCOFF_DEBUG) | |
1672 | next_block_index = 1; | |
1673 | #endif | |
1674 | ||
1675 | /* If the machine represents the prologue as RTL, the profiling code must | |
1676 | be emitted when NOTE_INSN_PROLOGUE_END is scanned. */ | |
1677 | #ifdef HAVE_prologue | |
1678 | if (! HAVE_prologue) | |
1679 | #endif | |
1680 | profile_after_prologue (file); | |
1681 | ||
1682 | profile_label_no++; | |
1683 | ||
1684 | /* If we are doing basic block profiling, remember a printable version | |
1685 | of the function name. */ | |
1686 | if (profile_block_flag) | |
1687 | { | |
db3cf6fb MS |
1688 | bb_func_label_num |
1689 | = add_bb_string ((*decl_printable_name) (current_function_decl, 2), FALSE); | |
3cf2715d DE |
1690 | } |
1691 | } | |
1692 | ||
1693 | static void | |
1694 | profile_after_prologue (file) | |
1695 | FILE *file; | |
1696 | { | |
1697 | #ifdef FUNCTION_BLOCK_PROFILER | |
1698 | if (profile_block_flag) | |
1699 | { | |
47431dff | 1700 | FUNCTION_BLOCK_PROFILER (file, count_basic_blocks); |
3cf2715d DE |
1701 | } |
1702 | #endif /* FUNCTION_BLOCK_PROFILER */ | |
1703 | ||
1704 | #ifndef PROFILE_BEFORE_PROLOGUE | |
1705 | if (profile_flag) | |
1706 | profile_function (file); | |
1707 | #endif /* not PROFILE_BEFORE_PROLOGUE */ | |
1708 | } | |
1709 | ||
1710 | static void | |
1711 | profile_function (file) | |
1712 | FILE *file; | |
1713 | { | |
9e2f9a7f | 1714 | int align = MIN (BIGGEST_ALIGNMENT, LONG_TYPE_SIZE); |
b729186a JL |
1715 | #if defined(ASM_OUTPUT_REG_PUSH) |
1716 | #if defined(STRUCT_VALUE_INCOMING_REGNUM) || defined(STRUCT_VALUE_REGNUM) | |
3cf2715d | 1717 | int sval = current_function_returns_struct; |
b729186a JL |
1718 | #endif |
1719 | #if defined(STATIC_CHAIN_INCOMING_REGNUM) || defined(STATIC_CHAIN_REGNUM) | |
3cf2715d | 1720 | int cxt = current_function_needs_context; |
b729186a JL |
1721 | #endif |
1722 | #endif /* ASM_OUTPUT_REG_PUSH */ | |
3cf2715d DE |
1723 | |
1724 | data_section (); | |
1725 | ASM_OUTPUT_ALIGN (file, floor_log2 (align / BITS_PER_UNIT)); | |
1726 | ASM_OUTPUT_INTERNAL_LABEL (file, "LP", profile_label_no); | |
9e2f9a7f | 1727 | assemble_integer (const0_rtx, LONG_TYPE_SIZE / BITS_PER_UNIT, 1); |
3cf2715d | 1728 | |
499df339 | 1729 | function_section (current_function_decl); |
3cf2715d | 1730 | |
65ed39df | 1731 | #if defined(STRUCT_VALUE_INCOMING_REGNUM) && defined(ASM_OUTPUT_REG_PUSH) |
3cf2715d DE |
1732 | if (sval) |
1733 | ASM_OUTPUT_REG_PUSH (file, STRUCT_VALUE_INCOMING_REGNUM); | |
1734 | #else | |
65ed39df | 1735 | #if defined(STRUCT_VALUE_REGNUM) && defined(ASM_OUTPUT_REG_PUSH) |
3cf2715d | 1736 | if (sval) |
51723711 KG |
1737 | { |
1738 | ASM_OUTPUT_REG_PUSH (file, STRUCT_VALUE_REGNUM); | |
1739 | } | |
3cf2715d DE |
1740 | #endif |
1741 | #endif | |
1742 | ||
65ed39df | 1743 | #if defined(STATIC_CHAIN_INCOMING_REGNUM) && defined(ASM_OUTPUT_REG_PUSH) |
3cf2715d DE |
1744 | if (cxt) |
1745 | ASM_OUTPUT_REG_PUSH (file, STATIC_CHAIN_INCOMING_REGNUM); | |
1746 | #else | |
65ed39df | 1747 | #if defined(STATIC_CHAIN_REGNUM) && defined(ASM_OUTPUT_REG_PUSH) |
3cf2715d | 1748 | if (cxt) |
51723711 KG |
1749 | { |
1750 | ASM_OUTPUT_REG_PUSH (file, STATIC_CHAIN_REGNUM); | |
1751 | } | |
3cf2715d DE |
1752 | #endif |
1753 | #endif | |
3cf2715d DE |
1754 | |
1755 | FUNCTION_PROFILER (file, profile_label_no); | |
1756 | ||
65ed39df | 1757 | #if defined(STATIC_CHAIN_INCOMING_REGNUM) && defined(ASM_OUTPUT_REG_PUSH) |
3cf2715d DE |
1758 | if (cxt) |
1759 | ASM_OUTPUT_REG_POP (file, STATIC_CHAIN_INCOMING_REGNUM); | |
1760 | #else | |
65ed39df | 1761 | #if defined(STATIC_CHAIN_REGNUM) && defined(ASM_OUTPUT_REG_PUSH) |
3cf2715d | 1762 | if (cxt) |
51723711 KG |
1763 | { |
1764 | ASM_OUTPUT_REG_POP (file, STATIC_CHAIN_REGNUM); | |
1765 | } | |
3cf2715d DE |
1766 | #endif |
1767 | #endif | |
3cf2715d | 1768 | |
65ed39df | 1769 | #if defined(STRUCT_VALUE_INCOMING_REGNUM) && defined(ASM_OUTPUT_REG_PUSH) |
3cf2715d DE |
1770 | if (sval) |
1771 | ASM_OUTPUT_REG_POP (file, STRUCT_VALUE_INCOMING_REGNUM); | |
1772 | #else | |
65ed39df | 1773 | #if defined(STRUCT_VALUE_REGNUM) && defined(ASM_OUTPUT_REG_PUSH) |
3cf2715d | 1774 | if (sval) |
51723711 KG |
1775 | { |
1776 | ASM_OUTPUT_REG_POP (file, STRUCT_VALUE_REGNUM); | |
1777 | } | |
3cf2715d DE |
1778 | #endif |
1779 | #endif | |
1780 | } | |
1781 | ||
1782 | /* Output assembler code for the end of a function. | |
1783 | For clarity, args are same as those of `final_start_function' | |
1784 | even though not all of them are needed. */ | |
1785 | ||
1786 | void | |
1787 | final_end_function (first, file, optimize) | |
6a651371 | 1788 | rtx first ATTRIBUTE_UNUSED; |
3cf2715d | 1789 | FILE *file; |
6a651371 | 1790 | int optimize ATTRIBUTE_UNUSED; |
3cf2715d DE |
1791 | { |
1792 | if (app_on) | |
1793 | { | |
51723711 | 1794 | fputs (ASM_APP_OFF, file); |
3cf2715d DE |
1795 | app_on = 0; |
1796 | } | |
1797 | ||
1798 | #ifdef SDB_DEBUGGING_INFO | |
1799 | if (write_symbols == SDB_DEBUG) | |
eac40081 | 1800 | sdbout_end_function (high_function_linenum); |
3cf2715d DE |
1801 | #endif |
1802 | ||
1803 | #ifdef DWARF_DEBUGGING_INFO | |
1804 | if (write_symbols == DWARF_DEBUG) | |
1805 | dwarfout_end_function (); | |
1806 | #endif | |
1807 | ||
1808 | #ifdef XCOFF_DEBUGGING_INFO | |
1809 | if (write_symbols == XCOFF_DEBUG) | |
eac40081 | 1810 | xcoffout_end_function (file, high_function_linenum); |
3cf2715d DE |
1811 | #endif |
1812 | ||
1813 | #ifdef FUNCTION_EPILOGUE | |
1814 | /* Finally, output the function epilogue: | |
1815 | code to restore the stack frame and return to the caller. */ | |
1816 | FUNCTION_EPILOGUE (file, get_frame_size ()); | |
1817 | #endif | |
1818 | ||
1819 | #ifdef SDB_DEBUGGING_INFO | |
1820 | if (write_symbols == SDB_DEBUG) | |
1821 | sdbout_end_epilogue (); | |
1822 | #endif | |
1823 | ||
1824 | #ifdef DWARF_DEBUGGING_INFO | |
1825 | if (write_symbols == DWARF_DEBUG) | |
1826 | dwarfout_end_epilogue (); | |
1827 | #endif | |
1828 | ||
c5cec899 | 1829 | #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO) |
0021b564 | 1830 | if (dwarf2out_do_frame ()) |
9a666dda JM |
1831 | dwarf2out_end_epilogue (); |
1832 | #endif | |
1833 | ||
3cf2715d DE |
1834 | #ifdef XCOFF_DEBUGGING_INFO |
1835 | if (write_symbols == XCOFF_DEBUG) | |
1836 | xcoffout_end_epilogue (file); | |
1837 | #endif | |
1838 | ||
1839 | bb_func_label_num = -1; /* not in function, nuke label # */ | |
1840 | ||
1841 | /* If FUNCTION_EPILOGUE is not defined, then the function body | |
1842 | itself contains return instructions wherever needed. */ | |
1843 | } | |
1844 | \f | |
1845 | /* Add a block to the linked list that remembers the current line/file/function | |
1846 | for basic block profiling. Emit the label in front of the basic block and | |
1847 | the instructions that increment the count field. */ | |
1848 | ||
1849 | static void | |
1850 | add_bb (file) | |
1851 | FILE *file; | |
1852 | { | |
1853 | struct bb_list *ptr = (struct bb_list *) permalloc (sizeof (struct bb_list)); | |
1854 | ||
1855 | /* Add basic block to linked list. */ | |
1856 | ptr->next = 0; | |
1857 | ptr->line_num = last_linenum; | |
1858 | ptr->file_label_num = bb_file_label_num; | |
1859 | ptr->func_label_num = bb_func_label_num; | |
1860 | *bb_tail = ptr; | |
1861 | bb_tail = &ptr->next; | |
1862 | ||
1863 | /* Enable the table of basic-block use counts | |
1864 | to point at the code it applies to. */ | |
1865 | ASM_OUTPUT_INTERNAL_LABEL (file, "LPB", count_basic_blocks); | |
1866 | ||
1867 | /* Before first insn of this basic block, increment the | |
1868 | count of times it was entered. */ | |
1869 | #ifdef BLOCK_PROFILER | |
1870 | BLOCK_PROFILER (file, count_basic_blocks); | |
9e2f9a7f DE |
1871 | #endif |
1872 | #ifdef HAVE_cc0 | |
3cf2715d DE |
1873 | CC_STATUS_INIT; |
1874 | #endif | |
1875 | ||
1876 | new_block = 0; | |
1877 | count_basic_blocks++; | |
1878 | } | |
1879 | ||
1880 | /* Add a string to be used for basic block profiling. */ | |
1881 | ||
1882 | static int | |
1883 | add_bb_string (string, perm_p) | |
9b3142b3 | 1884 | const char *string; |
3cf2715d DE |
1885 | int perm_p; |
1886 | { | |
1887 | int len; | |
1888 | struct bb_str *ptr = 0; | |
1889 | ||
1890 | if (!string) | |
1891 | { | |
1892 | string = "<unknown>"; | |
1893 | perm_p = TRUE; | |
1894 | } | |
1895 | ||
1896 | /* Allocate a new string if the current string isn't permanent. If | |
1897 | the string is permanent search for the same string in other | |
1898 | allocations. */ | |
1899 | ||
1900 | len = strlen (string) + 1; | |
1901 | if (!perm_p) | |
1902 | { | |
1903 | char *p = (char *) permalloc (len); | |
1904 | bcopy (string, p, len); | |
1905 | string = p; | |
1906 | } | |
1907 | else | |
0f41302f | 1908 | for (ptr = sbb_head; ptr != (struct bb_str *) 0; ptr = ptr->next) |
3cf2715d DE |
1909 | if (ptr->string == string) |
1910 | break; | |
1911 | ||
1912 | /* Allocate a new string block if we need to. */ | |
1913 | if (!ptr) | |
1914 | { | |
1915 | ptr = (struct bb_str *) permalloc (sizeof (*ptr)); | |
1916 | ptr->next = 0; | |
1917 | ptr->length = len; | |
1918 | ptr->label_num = sbb_label_num++; | |
1919 | ptr->string = string; | |
1920 | *sbb_tail = ptr; | |
1921 | sbb_tail = &ptr->next; | |
1922 | } | |
1923 | ||
1924 | return ptr->label_num; | |
1925 | } | |
1926 | ||
1927 | \f | |
1928 | /* Output assembler code for some insns: all or part of a function. | |
1929 | For description of args, see `final_start_function', above. | |
1930 | ||
1931 | PRESCAN is 1 if we are not really outputting, | |
1932 | just scanning as if we were outputting. | |
1933 | Prescanning deletes and rearranges insns just like ordinary output. | |
1934 | PRESCAN is -2 if we are outputting after having prescanned. | |
1935 | In this case, don't try to delete or rearrange insns | |
1936 | because that has already been done. | |
1937 | Prescanning is done only on certain machines. */ | |
1938 | ||
1939 | void | |
1940 | final (first, file, optimize, prescan) | |
1941 | rtx first; | |
1942 | FILE *file; | |
1943 | int optimize; | |
1944 | int prescan; | |
1945 | { | |
1946 | register rtx insn; | |
1947 | int max_line = 0; | |
a8c3510c | 1948 | int max_uid = 0; |
3cf2715d DE |
1949 | |
1950 | last_ignored_compare = 0; | |
1951 | new_block = 1; | |
1952 | ||
3d195391 MS |
1953 | check_exception_handler_labels (); |
1954 | ||
3cf2715d DE |
1955 | /* Make a map indicating which line numbers appear in this function. |
1956 | When producing SDB debugging info, delete troublesome line number | |
1957 | notes from inlined functions in other files as well as duplicate | |
1958 | line number notes. */ | |
1959 | #ifdef SDB_DEBUGGING_INFO | |
1960 | if (write_symbols == SDB_DEBUG) | |
1961 | { | |
1962 | rtx last = 0; | |
1963 | for (insn = first; insn; insn = NEXT_INSN (insn)) | |
1964 | if (GET_CODE (insn) == NOTE && NOTE_LINE_NUMBER (insn) > 0) | |
1965 | { | |
1966 | if ((RTX_INTEGRATED_P (insn) | |
1967 | && strcmp (NOTE_SOURCE_FILE (insn), main_input_filename) != 0) | |
1968 | || (last != 0 | |
1969 | && NOTE_LINE_NUMBER (insn) == NOTE_LINE_NUMBER (last) | |
1970 | && NOTE_SOURCE_FILE (insn) == NOTE_SOURCE_FILE (last))) | |
1971 | { | |
1972 | NOTE_LINE_NUMBER (insn) = NOTE_INSN_DELETED; | |
1973 | NOTE_SOURCE_FILE (insn) = 0; | |
1974 | continue; | |
1975 | } | |
1976 | last = insn; | |
1977 | if (NOTE_LINE_NUMBER (insn) > max_line) | |
1978 | max_line = NOTE_LINE_NUMBER (insn); | |
1979 | } | |
1980 | } | |
1981 | else | |
1982 | #endif | |
1983 | { | |
1984 | for (insn = first; insn; insn = NEXT_INSN (insn)) | |
1985 | if (GET_CODE (insn) == NOTE && NOTE_LINE_NUMBER (insn) > max_line) | |
1986 | max_line = NOTE_LINE_NUMBER (insn); | |
1987 | } | |
1988 | ||
1989 | line_note_exists = (char *) oballoc (max_line + 1); | |
1990 | bzero (line_note_exists, max_line + 1); | |
1991 | ||
1992 | for (insn = first; insn; insn = NEXT_INSN (insn)) | |
a8c3510c AM |
1993 | { |
1994 | if (INSN_UID (insn) > max_uid) /* find largest UID */ | |
1995 | max_uid = INSN_UID (insn); | |
1996 | if (GET_CODE (insn) == NOTE && NOTE_LINE_NUMBER (insn) > 0) | |
1997 | line_note_exists[NOTE_LINE_NUMBER (insn)] = 1; | |
9ef4c6ef JC |
1998 | #ifdef HAVE_cc0 |
1999 | /* If CC tracking across branches is enabled, record the insn which | |
2000 | jumps to each branch only reached from one place. */ | |
7ad7f828 | 2001 | if (optimize && GET_CODE (insn) == JUMP_INSN) |
9ef4c6ef JC |
2002 | { |
2003 | rtx lab = JUMP_LABEL (insn); | |
2004 | if (lab && LABEL_NUSES (lab) == 1) | |
2005 | { | |
2006 | LABEL_REFS (lab) = insn; | |
2007 | } | |
2008 | } | |
2009 | #endif | |
a8c3510c AM |
2010 | } |
2011 | ||
2012 | /* Initialize insn_eh_region table if eh is being used. */ | |
2013 | ||
2014 | init_insn_eh_region (first, max_uid); | |
3cf2715d DE |
2015 | |
2016 | init_recog (); | |
2017 | ||
2018 | CC_STATUS_INIT; | |
2019 | ||
2020 | /* Output the insns. */ | |
2021 | for (insn = NEXT_INSN (first); insn;) | |
2f16edb1 TG |
2022 | { |
2023 | #ifdef HAVE_ATTR_length | |
2024 | insn_current_address = insn_addresses[INSN_UID (insn)]; | |
2025 | #endif | |
2026 | insn = final_scan_insn (insn, file, optimize, prescan, 0); | |
2027 | } | |
3cf2715d DE |
2028 | |
2029 | /* Do basic-block profiling here | |
2030 | if the last insn was a conditional branch. */ | |
2031 | if (profile_block_flag && new_block) | |
2032 | add_bb (file); | |
a8c3510c AM |
2033 | |
2034 | free_insn_eh_region (); | |
3cf2715d DE |
2035 | } |
2036 | \f | |
2037 | /* The final scan for one insn, INSN. | |
2038 | Args are same as in `final', except that INSN | |
2039 | is the insn being scanned. | |
2040 | Value returned is the next insn to be scanned. | |
2041 | ||
2042 | NOPEEPHOLES is the flag to disallow peephole processing (currently | |
2043 | used for within delayed branch sequence output). */ | |
2044 | ||
2045 | rtx | |
2046 | final_scan_insn (insn, file, optimize, prescan, nopeepholes) | |
2047 | rtx insn; | |
2048 | FILE *file; | |
2049 | int optimize; | |
2050 | int prescan; | |
2051 | int nopeepholes; | |
2052 | { | |
90ca38bb MM |
2053 | #ifdef HAVE_cc0 |
2054 | rtx set; | |
2055 | #endif | |
2056 | ||
3cf2715d DE |
2057 | insn_counter++; |
2058 | ||
2059 | /* Ignore deleted insns. These can occur when we split insns (due to a | |
2060 | template of "#") while not optimizing. */ | |
2061 | if (INSN_DELETED_P (insn)) | |
2062 | return NEXT_INSN (insn); | |
2063 | ||
2064 | switch (GET_CODE (insn)) | |
2065 | { | |
2066 | case NOTE: | |
2067 | if (prescan > 0) | |
2068 | break; | |
2069 | ||
2070 | /* Align the beginning of a loop, for higher speed | |
2071 | on certain machines. */ | |
2072 | ||
fc470718 R |
2073 | if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_BEG) |
2074 | break; /* This used to depend on optimize, but that was bogus. */ | |
3cf2715d DE |
2075 | if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_END) |
2076 | break; | |
2077 | ||
9ad8a5f0 MS |
2078 | if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_EH_REGION_BEG |
2079 | && ! exceptions_via_longjmp) | |
3d195391 MS |
2080 | { |
2081 | ASM_OUTPUT_INTERNAL_LABEL (file, "LEHB", NOTE_BLOCK_NUMBER (insn)); | |
a1622f83 AM |
2082 | if (! flag_new_exceptions) |
2083 | add_eh_table_entry (NOTE_BLOCK_NUMBER (insn)); | |
3d195391 MS |
2084 | #ifdef ASM_OUTPUT_EH_REGION_BEG |
2085 | ASM_OUTPUT_EH_REGION_BEG (file, NOTE_BLOCK_NUMBER (insn)); | |
2086 | #endif | |
2087 | break; | |
2088 | } | |
2089 | ||
9ad8a5f0 MS |
2090 | if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_EH_REGION_END |
2091 | && ! exceptions_via_longjmp) | |
3d195391 MS |
2092 | { |
2093 | ASM_OUTPUT_INTERNAL_LABEL (file, "LEHE", NOTE_BLOCK_NUMBER (insn)); | |
a1622f83 AM |
2094 | if (flag_new_exceptions) |
2095 | add_eh_table_entry (NOTE_BLOCK_NUMBER (insn)); | |
3d195391 MS |
2096 | #ifdef ASM_OUTPUT_EH_REGION_END |
2097 | ASM_OUTPUT_EH_REGION_END (file, NOTE_BLOCK_NUMBER (insn)); | |
2098 | #endif | |
2099 | break; | |
2100 | } | |
2101 | ||
3cf2715d DE |
2102 | if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_PROLOGUE_END) |
2103 | { | |
2104 | #ifdef FUNCTION_END_PROLOGUE | |
2105 | FUNCTION_END_PROLOGUE (file); | |
2106 | #endif | |
2107 | profile_after_prologue (file); | |
2108 | break; | |
2109 | } | |
2110 | ||
2111 | #ifdef FUNCTION_BEGIN_EPILOGUE | |
2112 | if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_EPILOGUE_BEG) | |
2113 | { | |
2114 | FUNCTION_BEGIN_EPILOGUE (file); | |
2115 | break; | |
2116 | } | |
2117 | #endif | |
2118 | ||
2119 | if (write_symbols == NO_DEBUG) | |
2120 | break; | |
2121 | if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_FUNCTION_BEG) | |
2122 | { | |
3c734272 RK |
2123 | #if defined(SDB_DEBUGGING_INFO) && defined(MIPS_DEBUGGING_INFO) |
2124 | /* MIPS stabs require the parameter descriptions to be after the | |
0f41302f | 2125 | function entry point rather than before. */ |
3c734272 RK |
2126 | if (write_symbols == SDB_DEBUG) |
2127 | sdbout_begin_function (last_linenum); | |
2128 | else | |
2129 | #endif | |
3cf2715d | 2130 | #ifdef DWARF_DEBUGGING_INFO |
2e2bbce2 RK |
2131 | /* This outputs a marker where the function body starts, so it |
2132 | must be after the prologue. */ | |
3cf2715d DE |
2133 | if (write_symbols == DWARF_DEBUG) |
2134 | dwarfout_begin_function (); | |
2135 | #endif | |
2136 | break; | |
2137 | } | |
2138 | if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED) | |
2139 | break; /* An insn that was "deleted" */ | |
2140 | if (app_on) | |
2141 | { | |
51723711 | 2142 | fputs (ASM_APP_OFF, file); |
3cf2715d DE |
2143 | app_on = 0; |
2144 | } | |
2145 | if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_BLOCK_BEG | |
2146 | && (debug_info_level == DINFO_LEVEL_NORMAL | |
2147 | || debug_info_level == DINFO_LEVEL_VERBOSE | |
3cf2715d | 2148 | || write_symbols == DWARF_DEBUG |
9a666dda | 2149 | || write_symbols == DWARF2_DEBUG)) |
3cf2715d DE |
2150 | { |
2151 | /* Beginning of a symbol-block. Assign it a sequence number | |
2152 | and push the number onto the stack PENDING_BLOCKS. */ | |
2153 | ||
2154 | if (block_depth == max_block_depth) | |
2155 | { | |
2156 | /* PENDING_BLOCKS is full; make it longer. */ | |
2157 | max_block_depth *= 2; | |
2158 | pending_blocks | |
2159 | = (int *) xrealloc (pending_blocks, | |
2160 | max_block_depth * sizeof (int)); | |
2161 | } | |
2162 | pending_blocks[block_depth++] = next_block_index; | |
2163 | ||
eac40081 RK |
2164 | high_block_linenum = last_linenum; |
2165 | ||
3cf2715d DE |
2166 | /* Output debugging info about the symbol-block beginning. */ |
2167 | ||
2168 | #ifdef SDB_DEBUGGING_INFO | |
2169 | if (write_symbols == SDB_DEBUG) | |
2170 | sdbout_begin_block (file, last_linenum, next_block_index); | |
2171 | #endif | |
2172 | #ifdef XCOFF_DEBUGGING_INFO | |
2173 | if (write_symbols == XCOFF_DEBUG) | |
2174 | xcoffout_begin_block (file, last_linenum, next_block_index); | |
2175 | #endif | |
2176 | #ifdef DBX_DEBUGGING_INFO | |
2177 | if (write_symbols == DBX_DEBUG) | |
2178 | ASM_OUTPUT_INTERNAL_LABEL (file, "LBB", next_block_index); | |
2179 | #endif | |
2180 | #ifdef DWARF_DEBUGGING_INFO | |
7aecea25 | 2181 | if (write_symbols == DWARF_DEBUG) |
3cf2715d DE |
2182 | dwarfout_begin_block (next_block_index); |
2183 | #endif | |
9a666dda JM |
2184 | #ifdef DWARF2_DEBUGGING_INFO |
2185 | if (write_symbols == DWARF2_DEBUG) | |
2186 | dwarf2out_begin_block (next_block_index); | |
2187 | #endif | |
3cf2715d DE |
2188 | |
2189 | next_block_index++; | |
2190 | } | |
2191 | else if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_BLOCK_END | |
2192 | && (debug_info_level == DINFO_LEVEL_NORMAL | |
2193 | || debug_info_level == DINFO_LEVEL_VERBOSE | |
3cf2715d | 2194 | || write_symbols == DWARF_DEBUG |
9a666dda | 2195 | || write_symbols == DWARF2_DEBUG)) |
3cf2715d DE |
2196 | { |
2197 | /* End of a symbol-block. Pop its sequence number off | |
2198 | PENDING_BLOCKS and output debugging info based on that. */ | |
2199 | ||
2200 | --block_depth; | |
df3ba30a RH |
2201 | if (block_depth < 0) |
2202 | abort (); | |
3cf2715d DE |
2203 | |
2204 | #ifdef XCOFF_DEBUGGING_INFO | |
df3ba30a | 2205 | if (write_symbols == XCOFF_DEBUG) |
eac40081 RK |
2206 | xcoffout_end_block (file, high_block_linenum, |
2207 | pending_blocks[block_depth]); | |
3cf2715d DE |
2208 | #endif |
2209 | #ifdef DBX_DEBUGGING_INFO | |
df3ba30a | 2210 | if (write_symbols == DBX_DEBUG) |
3cf2715d DE |
2211 | ASM_OUTPUT_INTERNAL_LABEL (file, "LBE", |
2212 | pending_blocks[block_depth]); | |
2213 | #endif | |
2214 | #ifdef SDB_DEBUGGING_INFO | |
df3ba30a | 2215 | if (write_symbols == SDB_DEBUG) |
eac40081 RK |
2216 | sdbout_end_block (file, high_block_linenum, |
2217 | pending_blocks[block_depth]); | |
3cf2715d DE |
2218 | #endif |
2219 | #ifdef DWARF_DEBUGGING_INFO | |
df3ba30a | 2220 | if (write_symbols == DWARF_DEBUG) |
3cf2715d | 2221 | dwarfout_end_block (pending_blocks[block_depth]); |
9a666dda JM |
2222 | #endif |
2223 | #ifdef DWARF2_DEBUGGING_INFO | |
df3ba30a | 2224 | if (write_symbols == DWARF2_DEBUG) |
9a666dda | 2225 | dwarf2out_end_block (pending_blocks[block_depth]); |
3cf2715d DE |
2226 | #endif |
2227 | } | |
2228 | else if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED_LABEL | |
2229 | && (debug_info_level == DINFO_LEVEL_NORMAL | |
2230 | || debug_info_level == DINFO_LEVEL_VERBOSE)) | |
2231 | { | |
2232 | #ifdef DWARF_DEBUGGING_INFO | |
2233 | if (write_symbols == DWARF_DEBUG) | |
2234 | dwarfout_label (insn); | |
9a666dda JM |
2235 | #endif |
2236 | #ifdef DWARF2_DEBUGGING_INFO | |
2237 | if (write_symbols == DWARF2_DEBUG) | |
2238 | dwarf2out_label (insn); | |
3cf2715d DE |
2239 | #endif |
2240 | } | |
2241 | else if (NOTE_LINE_NUMBER (insn) > 0) | |
2242 | /* This note is a line-number. */ | |
2243 | { | |
2244 | register rtx note; | |
2245 | ||
2246 | #if 0 /* This is what we used to do. */ | |
2247 | output_source_line (file, insn); | |
2248 | #endif | |
2249 | int note_after = 0; | |
2250 | ||
2251 | /* If there is anything real after this note, | |
2252 | output it. If another line note follows, omit this one. */ | |
2253 | for (note = NEXT_INSN (insn); note; note = NEXT_INSN (note)) | |
2254 | { | |
2255 | if (GET_CODE (note) != NOTE && GET_CODE (note) != CODE_LABEL) | |
2256 | break; | |
2257 | /* These types of notes can be significant | |
2258 | so make sure the preceding line number stays. */ | |
2259 | else if (GET_CODE (note) == NOTE | |
2260 | && (NOTE_LINE_NUMBER (note) == NOTE_INSN_BLOCK_BEG | |
2261 | || NOTE_LINE_NUMBER (note) == NOTE_INSN_BLOCK_END | |
2262 | || NOTE_LINE_NUMBER (note) == NOTE_INSN_FUNCTION_BEG)) | |
2263 | break; | |
2264 | else if (GET_CODE (note) == NOTE && NOTE_LINE_NUMBER (note) > 0) | |
2265 | { | |
2266 | /* Another line note follows; we can delete this note | |
2267 | if no intervening line numbers have notes elsewhere. */ | |
2268 | int num; | |
2269 | for (num = NOTE_LINE_NUMBER (insn) + 1; | |
2270 | num < NOTE_LINE_NUMBER (note); | |
2271 | num++) | |
2272 | if (line_note_exists[num]) | |
2273 | break; | |
2274 | ||
2275 | if (num >= NOTE_LINE_NUMBER (note)) | |
2276 | note_after = 1; | |
2277 | break; | |
2278 | } | |
2279 | } | |
2280 | ||
2281 | /* Output this line note | |
2282 | if it is the first or the last line note in a row. */ | |
2283 | if (!note_after) | |
2284 | output_source_line (file, insn); | |
2285 | } | |
2286 | break; | |
2287 | ||
2288 | case BARRIER: | |
6020d360 JM |
2289 | #if defined (DWARF2_UNWIND_INFO) && !defined (ACCUMULATE_OUTGOING_ARGS) |
2290 | /* If we push arguments, we need to check all insns for stack | |
2291 | adjustments. */ | |
2292 | if (dwarf2out_do_frame ()) | |
2293 | dwarf2out_frame_debug (insn); | |
3cf2715d DE |
2294 | #endif |
2295 | break; | |
2296 | ||
2297 | case CODE_LABEL: | |
1dd8faa8 R |
2298 | /* The target port might emit labels in the output function for |
2299 | some insn, e.g. sh.c output_branchy_insn. */ | |
de7987a6 R |
2300 | if (CODE_LABEL_NUMBER (insn) <= max_labelno) |
2301 | { | |
2302 | int align = LABEL_TO_ALIGNMENT (insn); | |
50b2596f | 2303 | #ifdef ASM_OUTPUT_MAX_SKIP_ALIGN |
9e423e6d | 2304 | int max_skip = LABEL_TO_MAX_SKIP (insn); |
50b2596f | 2305 | #endif |
fc470718 | 2306 | |
1dd8faa8 | 2307 | if (align && NEXT_INSN (insn)) |
9e423e6d JW |
2308 | #ifdef ASM_OUTPUT_MAX_SKIP_ALIGN |
2309 | ASM_OUTPUT_MAX_SKIP_ALIGN (file, align, max_skip); | |
2310 | #else | |
de7987a6 | 2311 | ASM_OUTPUT_ALIGN (file, align); |
9e423e6d | 2312 | #endif |
de7987a6 | 2313 | } |
9ef4c6ef | 2314 | #ifdef HAVE_cc0 |
3cf2715d | 2315 | CC_STATUS_INIT; |
9ef4c6ef JC |
2316 | /* If this label is reached from only one place, set the condition |
2317 | codes from the instruction just before the branch. */ | |
7ad7f828 JC |
2318 | |
2319 | /* Disabled because some insns set cc_status in the C output code | |
2320 | and NOTICE_UPDATE_CC alone can set incorrect status. */ | |
2321 | if (0 /* optimize && LABEL_NUSES (insn) == 1*/) | |
9ef4c6ef JC |
2322 | { |
2323 | rtx jump = LABEL_REFS (insn); | |
2324 | rtx barrier = prev_nonnote_insn (insn); | |
2325 | rtx prev; | |
2326 | /* If the LABEL_REFS field of this label has been set to point | |
2327 | at a branch, the predecessor of the branch is a regular | |
2328 | insn, and that branch is the only way to reach this label, | |
2329 | set the condition codes based on the branch and its | |
2330 | predecessor. */ | |
2331 | if (barrier && GET_CODE (barrier) == BARRIER | |
2332 | && jump && GET_CODE (jump) == JUMP_INSN | |
2333 | && (prev = prev_nonnote_insn (jump)) | |
2334 | && GET_CODE (prev) == INSN) | |
2335 | { | |
2336 | NOTICE_UPDATE_CC (PATTERN (prev), prev); | |
2337 | NOTICE_UPDATE_CC (PATTERN (jump), jump); | |
2338 | } | |
2339 | } | |
2340 | #endif | |
3cf2715d DE |
2341 | if (prescan > 0) |
2342 | break; | |
2343 | new_block = 1; | |
03ffa171 RK |
2344 | |
2345 | #ifdef FINAL_PRESCAN_LABEL | |
2346 | FINAL_PRESCAN_INSN (insn, NULL_PTR, 0); | |
2347 | #endif | |
2348 | ||
3cf2715d DE |
2349 | #ifdef SDB_DEBUGGING_INFO |
2350 | if (write_symbols == SDB_DEBUG && LABEL_NAME (insn)) | |
2351 | sdbout_label (insn); | |
2352 | #endif | |
2353 | #ifdef DWARF_DEBUGGING_INFO | |
2354 | if (write_symbols == DWARF_DEBUG && LABEL_NAME (insn)) | |
2355 | dwarfout_label (insn); | |
9a666dda JM |
2356 | #endif |
2357 | #ifdef DWARF2_DEBUGGING_INFO | |
2358 | if (write_symbols == DWARF2_DEBUG && LABEL_NAME (insn)) | |
2359 | dwarf2out_label (insn); | |
3cf2715d DE |
2360 | #endif |
2361 | if (app_on) | |
2362 | { | |
51723711 | 2363 | fputs (ASM_APP_OFF, file); |
3cf2715d DE |
2364 | app_on = 0; |
2365 | } | |
2366 | if (NEXT_INSN (insn) != 0 | |
2367 | && GET_CODE (NEXT_INSN (insn)) == JUMP_INSN) | |
2368 | { | |
2369 | rtx nextbody = PATTERN (NEXT_INSN (insn)); | |
2370 | ||
2371 | /* If this label is followed by a jump-table, | |
2372 | make sure we put the label in the read-only section. Also | |
2373 | possibly write the label and jump table together. */ | |
2374 | ||
2375 | if (GET_CODE (nextbody) == ADDR_VEC | |
2376 | || GET_CODE (nextbody) == ADDR_DIFF_VEC) | |
2377 | { | |
e0d80184 DM |
2378 | #if defined(ASM_OUTPUT_ADDR_VEC) || defined(ASM_OUTPUT_ADDR_DIFF_VEC) |
2379 | /* In this case, the case vector is being moved by the | |
2380 | target, so don't output the label at all. Leave that | |
2381 | to the back end macros. */ | |
2382 | #else | |
75197b37 BS |
2383 | if (! JUMP_TABLES_IN_TEXT_SECTION) |
2384 | { | |
2385 | readonly_data_section (); | |
3cf2715d | 2386 | #ifdef READONLY_DATA_SECTION |
75197b37 BS |
2387 | ASM_OUTPUT_ALIGN (file, |
2388 | exact_log2 (BIGGEST_ALIGNMENT | |
2389 | / BITS_PER_UNIT)); | |
3cf2715d | 2390 | #endif /* READONLY_DATA_SECTION */ |
75197b37 BS |
2391 | } |
2392 | else | |
2393 | function_section (current_function_decl); | |
2394 | ||
3cf2715d DE |
2395 | #ifdef ASM_OUTPUT_CASE_LABEL |
2396 | ASM_OUTPUT_CASE_LABEL (file, "L", CODE_LABEL_NUMBER (insn), | |
2397 | NEXT_INSN (insn)); | |
2398 | #else | |
2399 | ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (insn)); | |
e0d80184 | 2400 | #endif |
3cf2715d DE |
2401 | #endif |
2402 | break; | |
2403 | } | |
2404 | } | |
2405 | ||
2406 | ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (insn)); | |
2407 | break; | |
2408 | ||
2409 | default: | |
2410 | { | |
51723711 | 2411 | register rtx body = PATTERN (insn); |
3cf2715d | 2412 | int insn_code_number; |
9b3142b3 | 2413 | const char *template; |
b729186a | 2414 | #ifdef HAVE_cc0 |
3cf2715d | 2415 | rtx note; |
b729186a | 2416 | #endif |
3cf2715d DE |
2417 | |
2418 | /* An INSN, JUMP_INSN or CALL_INSN. | |
2419 | First check for special kinds that recog doesn't recognize. */ | |
2420 | ||
2421 | if (GET_CODE (body) == USE /* These are just declarations */ | |
2422 | || GET_CODE (body) == CLOBBER) | |
2423 | break; | |
2424 | ||
2425 | #ifdef HAVE_cc0 | |
2426 | /* If there is a REG_CC_SETTER note on this insn, it means that | |
2427 | the setting of the condition code was done in the delay slot | |
2428 | of the insn that branched here. So recover the cc status | |
2429 | from the insn that set it. */ | |
2430 | ||
2431 | note = find_reg_note (insn, REG_CC_SETTER, NULL_RTX); | |
2432 | if (note) | |
2433 | { | |
2434 | NOTICE_UPDATE_CC (PATTERN (XEXP (note, 0)), XEXP (note, 0)); | |
2435 | cc_prev_status = cc_status; | |
2436 | } | |
2437 | #endif | |
2438 | ||
2439 | /* Detect insns that are really jump-tables | |
2440 | and output them as such. */ | |
2441 | ||
2442 | if (GET_CODE (body) == ADDR_VEC || GET_CODE (body) == ADDR_DIFF_VEC) | |
2443 | { | |
7f7f8214 | 2444 | #if !(defined(ASM_OUTPUT_ADDR_VEC) || defined(ASM_OUTPUT_ADDR_DIFF_VEC)) |
3cf2715d | 2445 | register int vlen, idx; |
7f7f8214 | 2446 | #endif |
3cf2715d DE |
2447 | |
2448 | if (prescan > 0) | |
2449 | break; | |
2450 | ||
2451 | if (app_on) | |
2452 | { | |
51723711 | 2453 | fputs (ASM_APP_OFF, file); |
3cf2715d DE |
2454 | app_on = 0; |
2455 | } | |
2456 | ||
e0d80184 DM |
2457 | #if defined(ASM_OUTPUT_ADDR_VEC) || defined(ASM_OUTPUT_ADDR_DIFF_VEC) |
2458 | if (GET_CODE (body) == ADDR_VEC) | |
2459 | { | |
2460 | #ifdef ASM_OUTPUT_ADDR_VEC | |
2461 | ASM_OUTPUT_ADDR_VEC (PREV_INSN (insn), body); | |
2462 | #else | |
2463 | abort(); | |
2464 | #endif | |
2465 | } | |
2466 | else | |
2467 | { | |
2468 | #ifdef ASM_OUTPUT_ADDR_DIFF_VEC | |
2469 | ASM_OUTPUT_ADDR_DIFF_VEC (PREV_INSN (insn), body); | |
2470 | #else | |
2471 | abort(); | |
2472 | #endif | |
2473 | } | |
2474 | #else | |
3cf2715d DE |
2475 | vlen = XVECLEN (body, GET_CODE (body) == ADDR_DIFF_VEC); |
2476 | for (idx = 0; idx < vlen; idx++) | |
2477 | { | |
2478 | if (GET_CODE (body) == ADDR_VEC) | |
2479 | { | |
2480 | #ifdef ASM_OUTPUT_ADDR_VEC_ELT | |
2481 | ASM_OUTPUT_ADDR_VEC_ELT | |
2482 | (file, CODE_LABEL_NUMBER (XEXP (XVECEXP (body, 0, idx), 0))); | |
2483 | #else | |
2484 | abort (); | |
2485 | #endif | |
2486 | } | |
2487 | else | |
2488 | { | |
2489 | #ifdef ASM_OUTPUT_ADDR_DIFF_ELT | |
2490 | ASM_OUTPUT_ADDR_DIFF_ELT | |
2491 | (file, | |
33f7f353 | 2492 | body, |
3cf2715d DE |
2493 | CODE_LABEL_NUMBER (XEXP (XVECEXP (body, 1, idx), 0)), |
2494 | CODE_LABEL_NUMBER (XEXP (XEXP (body, 0), 0))); | |
2495 | #else | |
2496 | abort (); | |
2497 | #endif | |
2498 | } | |
2499 | } | |
2500 | #ifdef ASM_OUTPUT_CASE_END | |
2501 | ASM_OUTPUT_CASE_END (file, | |
2502 | CODE_LABEL_NUMBER (PREV_INSN (insn)), | |
2503 | insn); | |
e0d80184 | 2504 | #endif |
3cf2715d DE |
2505 | #endif |
2506 | ||
4d1065ed | 2507 | function_section (current_function_decl); |
3cf2715d DE |
2508 | |
2509 | break; | |
2510 | } | |
2511 | ||
2512 | /* Do basic-block profiling when we reach a new block. | |
2513 | Done here to avoid jump tables. */ | |
2514 | if (profile_block_flag && new_block) | |
2515 | add_bb (file); | |
2516 | ||
2517 | if (GET_CODE (body) == ASM_INPUT) | |
2518 | { | |
2519 | /* There's no telling what that did to the condition codes. */ | |
2520 | CC_STATUS_INIT; | |
2521 | if (prescan > 0) | |
2522 | break; | |
2523 | if (! app_on) | |
2524 | { | |
51723711 | 2525 | fputs (ASM_APP_ON, file); |
3cf2715d DE |
2526 | app_on = 1; |
2527 | } | |
2528 | fprintf (asm_out_file, "\t%s\n", XSTR (body, 0)); | |
2529 | break; | |
2530 | } | |
2531 | ||
2532 | /* Detect `asm' construct with operands. */ | |
2533 | if (asm_noperands (body) >= 0) | |
2534 | { | |
22bf4422 | 2535 | unsigned int noperands = asm_noperands (body); |
3cf2715d DE |
2536 | rtx *ops = (rtx *) alloca (noperands * sizeof (rtx)); |
2537 | char *string; | |
2538 | ||
2539 | /* There's no telling what that did to the condition codes. */ | |
2540 | CC_STATUS_INIT; | |
2541 | if (prescan > 0) | |
2542 | break; | |
2543 | ||
2544 | if (! app_on) | |
2545 | { | |
51723711 | 2546 | fputs (ASM_APP_ON, file); |
3cf2715d DE |
2547 | app_on = 1; |
2548 | } | |
2549 | ||
2550 | /* Get out the operand values. */ | |
2551 | string = decode_asm_operands (body, ops, NULL_PTR, | |
2552 | NULL_PTR, NULL_PTR); | |
2553 | /* Inhibit aborts on what would otherwise be compiler bugs. */ | |
2554 | insn_noperands = noperands; | |
2555 | this_is_asm_operands = insn; | |
2556 | ||
2557 | /* Output the insn using them. */ | |
2558 | output_asm_insn (string, ops); | |
2559 | this_is_asm_operands = 0; | |
2560 | break; | |
2561 | } | |
2562 | ||
2563 | if (prescan <= 0 && app_on) | |
2564 | { | |
51723711 | 2565 | fputs (ASM_APP_OFF, file); |
3cf2715d DE |
2566 | app_on = 0; |
2567 | } | |
2568 | ||
2569 | if (GET_CODE (body) == SEQUENCE) | |
2570 | { | |
2571 | /* A delayed-branch sequence */ | |
2572 | register int i; | |
2573 | rtx next; | |
2574 | ||
2575 | if (prescan > 0) | |
2576 | break; | |
2577 | final_sequence = body; | |
2578 | ||
2579 | /* The first insn in this SEQUENCE might be a JUMP_INSN that will | |
2580 | force the restoration of a comparison that was previously | |
2581 | thought unnecessary. If that happens, cancel this sequence | |
2582 | and cause that insn to be restored. */ | |
2583 | ||
2584 | next = final_scan_insn (XVECEXP (body, 0, 0), file, 0, prescan, 1); | |
2585 | if (next != XVECEXP (body, 0, 1)) | |
2586 | { | |
2587 | final_sequence = 0; | |
2588 | return next; | |
2589 | } | |
2590 | ||
2591 | for (i = 1; i < XVECLEN (body, 0); i++) | |
c7eee2df RK |
2592 | { |
2593 | rtx insn = XVECEXP (body, 0, i); | |
2594 | rtx next = NEXT_INSN (insn); | |
2595 | /* We loop in case any instruction in a delay slot gets | |
2596 | split. */ | |
2597 | do | |
2598 | insn = final_scan_insn (insn, file, 0, prescan, 1); | |
2599 | while (insn != next); | |
2600 | } | |
3cf2715d DE |
2601 | #ifdef DBR_OUTPUT_SEQEND |
2602 | DBR_OUTPUT_SEQEND (file); | |
2603 | #endif | |
2604 | final_sequence = 0; | |
2605 | ||
2606 | /* If the insn requiring the delay slot was a CALL_INSN, the | |
2607 | insns in the delay slot are actually executed before the | |
2608 | called function. Hence we don't preserve any CC-setting | |
2609 | actions in these insns and the CC must be marked as being | |
2610 | clobbered by the function. */ | |
2611 | if (GET_CODE (XVECEXP (body, 0, 0)) == CALL_INSN) | |
b729186a JL |
2612 | { |
2613 | CC_STATUS_INIT; | |
2614 | } | |
3cf2715d DE |
2615 | |
2616 | /* Following a conditional branch sequence, we have a new basic | |
2617 | block. */ | |
2618 | if (profile_block_flag) | |
2619 | { | |
2620 | rtx insn = XVECEXP (body, 0, 0); | |
2621 | rtx body = PATTERN (insn); | |
2622 | ||
2623 | if ((GET_CODE (insn) == JUMP_INSN && GET_CODE (body) == SET | |
2624 | && GET_CODE (SET_SRC (body)) != LABEL_REF) | |
2625 | || (GET_CODE (insn) == JUMP_INSN | |
2626 | && GET_CODE (body) == PARALLEL | |
2627 | && GET_CODE (XVECEXP (body, 0, 0)) == SET | |
2628 | && GET_CODE (SET_SRC (XVECEXP (body, 0, 0))) != LABEL_REF)) | |
2629 | new_block = 1; | |
2630 | } | |
2631 | break; | |
2632 | } | |
2633 | ||
2634 | /* We have a real machine instruction as rtl. */ | |
2635 | ||
2636 | body = PATTERN (insn); | |
2637 | ||
2638 | #ifdef HAVE_cc0 | |
b88c92cc RK |
2639 | set = single_set(insn); |
2640 | ||
3cf2715d DE |
2641 | /* Check for redundant test and compare instructions |
2642 | (when the condition codes are already set up as desired). | |
2643 | This is done only when optimizing; if not optimizing, | |
2644 | it should be possible for the user to alter a variable | |
2645 | with the debugger in between statements | |
2646 | and the next statement should reexamine the variable | |
2647 | to compute the condition codes. */ | |
2648 | ||
30f5e9f5 | 2649 | if (optimize) |
3cf2715d | 2650 | { |
b88c92cc | 2651 | #if 0 |
30f5e9f5 | 2652 | rtx set = single_set(insn); |
b88c92cc | 2653 | #endif |
30f5e9f5 RK |
2654 | |
2655 | if (set | |
2656 | && GET_CODE (SET_DEST (set)) == CC0 | |
2657 | && insn != last_ignored_compare) | |
3cf2715d | 2658 | { |
30f5e9f5 RK |
2659 | if (GET_CODE (SET_SRC (set)) == SUBREG) |
2660 | SET_SRC (set) = alter_subreg (SET_SRC (set)); | |
2661 | else if (GET_CODE (SET_SRC (set)) == COMPARE) | |
2662 | { | |
2663 | if (GET_CODE (XEXP (SET_SRC (set), 0)) == SUBREG) | |
2664 | XEXP (SET_SRC (set), 0) | |
2665 | = alter_subreg (XEXP (SET_SRC (set), 0)); | |
2666 | if (GET_CODE (XEXP (SET_SRC (set), 1)) == SUBREG) | |
2667 | XEXP (SET_SRC (set), 1) | |
2668 | = alter_subreg (XEXP (SET_SRC (set), 1)); | |
2669 | } | |
2670 | if ((cc_status.value1 != 0 | |
2671 | && rtx_equal_p (SET_SRC (set), cc_status.value1)) | |
2672 | || (cc_status.value2 != 0 | |
2673 | && rtx_equal_p (SET_SRC (set), cc_status.value2))) | |
3cf2715d | 2674 | { |
30f5e9f5 RK |
2675 | /* Don't delete insn if it has an addressing side-effect. */ |
2676 | if (! FIND_REG_INC_NOTE (insn, 0) | |
2677 | /* or if anything in it is volatile. */ | |
2678 | && ! volatile_refs_p (PATTERN (insn))) | |
2679 | { | |
2680 | /* We don't really delete the insn; just ignore it. */ | |
2681 | last_ignored_compare = insn; | |
2682 | break; | |
2683 | } | |
3cf2715d DE |
2684 | } |
2685 | } | |
2686 | } | |
2687 | #endif | |
2688 | ||
2689 | /* Following a conditional branch, we have a new basic block. | |
2690 | But if we are inside a sequence, the new block starts after the | |
2691 | last insn of the sequence. */ | |
2692 | if (profile_block_flag && final_sequence == 0 | |
2693 | && ((GET_CODE (insn) == JUMP_INSN && GET_CODE (body) == SET | |
2694 | && GET_CODE (SET_SRC (body)) != LABEL_REF) | |
2695 | || (GET_CODE (insn) == JUMP_INSN && GET_CODE (body) == PARALLEL | |
2696 | && GET_CODE (XVECEXP (body, 0, 0)) == SET | |
2697 | && GET_CODE (SET_SRC (XVECEXP (body, 0, 0))) != LABEL_REF))) | |
2698 | new_block = 1; | |
2699 | ||
2700 | #ifndef STACK_REGS | |
2701 | /* Don't bother outputting obvious no-ops, even without -O. | |
2702 | This optimization is fast and doesn't interfere with debugging. | |
2703 | Don't do this if the insn is in a delay slot, since this | |
2704 | will cause an improper number of delay insns to be written. */ | |
2705 | if (final_sequence == 0 | |
2706 | && prescan >= 0 | |
2707 | && GET_CODE (insn) == INSN && GET_CODE (body) == SET | |
2708 | && GET_CODE (SET_SRC (body)) == REG | |
2709 | && GET_CODE (SET_DEST (body)) == REG | |
2710 | && REGNO (SET_SRC (body)) == REGNO (SET_DEST (body))) | |
2711 | break; | |
2712 | #endif | |
2713 | ||
2714 | #ifdef HAVE_cc0 | |
2715 | /* If this is a conditional branch, maybe modify it | |
2716 | if the cc's are in a nonstandard state | |
2717 | so that it accomplishes the same thing that it would | |
2718 | do straightforwardly if the cc's were set up normally. */ | |
2719 | ||
2720 | if (cc_status.flags != 0 | |
2721 | && GET_CODE (insn) == JUMP_INSN | |
2722 | && GET_CODE (body) == SET | |
2723 | && SET_DEST (body) == pc_rtx | |
2724 | && GET_CODE (SET_SRC (body)) == IF_THEN_ELSE | |
de2b56f9 | 2725 | && GET_RTX_CLASS (GET_CODE (XEXP (SET_SRC (body), 0))) == '<' |
fff752ad | 2726 | && XEXP (XEXP (SET_SRC (body), 0), 0) == cc0_rtx |
3cf2715d DE |
2727 | /* This is done during prescan; it is not done again |
2728 | in final scan when prescan has been done. */ | |
2729 | && prescan >= 0) | |
2730 | { | |
2731 | /* This function may alter the contents of its argument | |
2732 | and clear some of the cc_status.flags bits. | |
2733 | It may also return 1 meaning condition now always true | |
2734 | or -1 meaning condition now always false | |
2735 | or 2 meaning condition nontrivial but altered. */ | |
2736 | register int result = alter_cond (XEXP (SET_SRC (body), 0)); | |
2737 | /* If condition now has fixed value, replace the IF_THEN_ELSE | |
2738 | with its then-operand or its else-operand. */ | |
2739 | if (result == 1) | |
2740 | SET_SRC (body) = XEXP (SET_SRC (body), 1); | |
2741 | if (result == -1) | |
2742 | SET_SRC (body) = XEXP (SET_SRC (body), 2); | |
2743 | ||
2744 | /* The jump is now either unconditional or a no-op. | |
2745 | If it has become a no-op, don't try to output it. | |
2746 | (It would not be recognized.) */ | |
2747 | if (SET_SRC (body) == pc_rtx) | |
2748 | { | |
2749 | PUT_CODE (insn, NOTE); | |
2750 | NOTE_LINE_NUMBER (insn) = NOTE_INSN_DELETED; | |
2751 | NOTE_SOURCE_FILE (insn) = 0; | |
2752 | break; | |
2753 | } | |
2754 | else if (GET_CODE (SET_SRC (body)) == RETURN) | |
2755 | /* Replace (set (pc) (return)) with (return). */ | |
2756 | PATTERN (insn) = body = SET_SRC (body); | |
2757 | ||
2758 | /* Rerecognize the instruction if it has changed. */ | |
2759 | if (result != 0) | |
2760 | INSN_CODE (insn) = -1; | |
2761 | } | |
2762 | ||
2763 | /* Make same adjustments to instructions that examine the | |
462da2af SC |
2764 | condition codes without jumping and instructions that |
2765 | handle conditional moves (if this machine has either one). */ | |
3cf2715d DE |
2766 | |
2767 | if (cc_status.flags != 0 | |
b88c92cc | 2768 | && set != 0) |
3cf2715d | 2769 | { |
462da2af SC |
2770 | rtx cond_rtx, then_rtx, else_rtx; |
2771 | ||
2772 | if (GET_CODE (insn) != JUMP_INSN | |
b88c92cc | 2773 | && GET_CODE (SET_SRC (set)) == IF_THEN_ELSE) |
462da2af | 2774 | { |
b88c92cc RK |
2775 | cond_rtx = XEXP (SET_SRC (set), 0); |
2776 | then_rtx = XEXP (SET_SRC (set), 1); | |
2777 | else_rtx = XEXP (SET_SRC (set), 2); | |
462da2af SC |
2778 | } |
2779 | else | |
2780 | { | |
b88c92cc | 2781 | cond_rtx = SET_SRC (set); |
462da2af SC |
2782 | then_rtx = const_true_rtx; |
2783 | else_rtx = const0_rtx; | |
2784 | } | |
2785 | ||
2786 | switch (GET_CODE (cond_rtx)) | |
3cf2715d DE |
2787 | { |
2788 | case GTU: | |
2789 | case GT: | |
2790 | case LTU: | |
2791 | case LT: | |
2792 | case GEU: | |
2793 | case GE: | |
2794 | case LEU: | |
2795 | case LE: | |
2796 | case EQ: | |
2797 | case NE: | |
2798 | { | |
2799 | register int result; | |
462da2af | 2800 | if (XEXP (cond_rtx, 0) != cc0_rtx) |
3cf2715d | 2801 | break; |
462da2af | 2802 | result = alter_cond (cond_rtx); |
3cf2715d | 2803 | if (result == 1) |
b88c92cc | 2804 | validate_change (insn, &SET_SRC (set), then_rtx, 0); |
3cf2715d | 2805 | else if (result == -1) |
b88c92cc | 2806 | validate_change (insn, &SET_SRC (set), else_rtx, 0); |
3cf2715d DE |
2807 | else if (result == 2) |
2808 | INSN_CODE (insn) = -1; | |
b88c92cc | 2809 | if (SET_DEST (set) == SET_SRC (set)) |
462da2af SC |
2810 | { |
2811 | PUT_CODE (insn, NOTE); | |
2812 | NOTE_LINE_NUMBER (insn) = NOTE_INSN_DELETED; | |
2813 | NOTE_SOURCE_FILE (insn) = 0; | |
462da2af | 2814 | } |
3cf2715d | 2815 | } |
e9a25f70 JL |
2816 | break; |
2817 | ||
2818 | default: | |
2819 | break; | |
3cf2715d DE |
2820 | } |
2821 | } | |
462da2af | 2822 | |
3cf2715d DE |
2823 | #endif |
2824 | ||
ede7cd44 | 2825 | #ifdef HAVE_peephole |
3cf2715d DE |
2826 | /* Do machine-specific peephole optimizations if desired. */ |
2827 | ||
2828 | if (optimize && !flag_no_peephole && !nopeepholes) | |
2829 | { | |
2830 | rtx next = peephole (insn); | |
2831 | /* When peepholing, if there were notes within the peephole, | |
2832 | emit them before the peephole. */ | |
2833 | if (next != 0 && next != NEXT_INSN (insn)) | |
2834 | { | |
2835 | rtx prev = PREV_INSN (insn); | |
2836 | rtx note; | |
2837 | ||
2838 | for (note = NEXT_INSN (insn); note != next; | |
2839 | note = NEXT_INSN (note)) | |
2840 | final_scan_insn (note, file, optimize, prescan, nopeepholes); | |
2841 | ||
2842 | /* In case this is prescan, put the notes | |
2843 | in proper position for later rescan. */ | |
2844 | note = NEXT_INSN (insn); | |
2845 | PREV_INSN (note) = prev; | |
2846 | NEXT_INSN (prev) = note; | |
2847 | NEXT_INSN (PREV_INSN (next)) = insn; | |
2848 | PREV_INSN (insn) = PREV_INSN (next); | |
2849 | NEXT_INSN (insn) = next; | |
2850 | PREV_INSN (next) = insn; | |
2851 | } | |
2852 | ||
2853 | /* PEEPHOLE might have changed this. */ | |
2854 | body = PATTERN (insn); | |
2855 | } | |
ede7cd44 | 2856 | #endif |
3cf2715d DE |
2857 | |
2858 | /* Try to recognize the instruction. | |
2859 | If successful, verify that the operands satisfy the | |
2860 | constraints for the instruction. Crash if they don't, | |
2861 | since `reload' should have changed them so that they do. */ | |
2862 | ||
2863 | insn_code_number = recog_memoized (insn); | |
0eadeb15 | 2864 | extract_insn (insn); |
0304f787 | 2865 | cleanup_subreg_operands (insn); |
3cf2715d DE |
2866 | |
2867 | #ifdef REGISTER_CONSTRAINTS | |
0eadeb15 | 2868 | if (! constrain_operands (1)) |
3cf2715d DE |
2869 | fatal_insn_not_found (insn); |
2870 | #endif | |
2871 | ||
2872 | /* Some target machines need to prescan each insn before | |
2873 | it is output. */ | |
2874 | ||
2875 | #ifdef FINAL_PRESCAN_INSN | |
1ccbefce | 2876 | FINAL_PRESCAN_INSN (insn, recog_data.operand, recog_data.n_operands); |
3cf2715d DE |
2877 | #endif |
2878 | ||
2879 | #ifdef HAVE_cc0 | |
2880 | cc_prev_status = cc_status; | |
2881 | ||
2882 | /* Update `cc_status' for this instruction. | |
2883 | The instruction's output routine may change it further. | |
2884 | If the output routine for a jump insn needs to depend | |
2885 | on the cc status, it should look at cc_prev_status. */ | |
2886 | ||
2887 | NOTICE_UPDATE_CC (body, insn); | |
2888 | #endif | |
2889 | ||
2890 | debug_insn = insn; | |
2891 | ||
b57d9225 JM |
2892 | #if defined (DWARF2_UNWIND_INFO) && !defined (ACCUMULATE_OUTGOING_ARGS) |
2893 | /* If we push arguments, we want to know where the calls are. */ | |
2894 | if (GET_CODE (insn) == CALL_INSN && dwarf2out_do_frame ()) | |
2895 | dwarf2out_frame_debug (insn); | |
2896 | #endif | |
2897 | ||
3cf2715d DE |
2898 | /* If the proper template needs to be chosen by some C code, |
2899 | run that code and get the real template. */ | |
2900 | ||
2901 | template = insn_template[insn_code_number]; | |
2902 | if (template == 0) | |
2903 | { | |
1ccbefce RH |
2904 | template = ((*insn_outfun[insn_code_number]) |
2905 | (recog_data.operand, insn)); | |
3cf2715d DE |
2906 | |
2907 | /* If the C code returns 0, it means that it is a jump insn | |
2908 | which follows a deleted test insn, and that test insn | |
2909 | needs to be reinserted. */ | |
2910 | if (template == 0) | |
2911 | { | |
2912 | if (prev_nonnote_insn (insn) != last_ignored_compare) | |
2913 | abort (); | |
2914 | new_block = 0; | |
2915 | return prev_nonnote_insn (insn); | |
2916 | } | |
2917 | } | |
2918 | ||
2919 | /* If the template is the string "#", it means that this insn must | |
2920 | be split. */ | |
2921 | if (template[0] == '#' && template[1] == '\0') | |
2922 | { | |
2923 | rtx new = try_split (body, insn, 0); | |
2924 | ||
2925 | /* If we didn't split the insn, go away. */ | |
2926 | if (new == insn && PATTERN (new) == body) | |
cf879efa | 2927 | fatal_insn ("Could not split insn", insn); |
3cf2715d | 2928 | |
3d14e82f JW |
2929 | #ifdef HAVE_ATTR_length |
2930 | /* This instruction should have been split in shorten_branches, | |
2931 | to ensure that we would have valid length info for the | |
2932 | splitees. */ | |
2933 | abort (); | |
2934 | #endif | |
2935 | ||
3cf2715d DE |
2936 | new_block = 0; |
2937 | return new; | |
2938 | } | |
2939 | ||
2940 | if (prescan > 0) | |
2941 | break; | |
2942 | ||
2943 | /* Output assembler code from the template. */ | |
2944 | ||
1ccbefce | 2945 | output_asm_insn (template, recog_data.operand); |
3cf2715d | 2946 | |
0021b564 JM |
2947 | #if defined (DWARF2_UNWIND_INFO) |
2948 | #if !defined (ACCUMULATE_OUTGOING_ARGS) | |
2949 | /* If we push arguments, we need to check all insns for stack | |
2950 | adjustments. */ | |
b57d9225 | 2951 | if (GET_CODE (insn) == INSN && dwarf2out_do_frame ()) |
0021b564 JM |
2952 | dwarf2out_frame_debug (insn); |
2953 | #else | |
2954 | #if defined (HAVE_prologue) | |
469ac993 JM |
2955 | /* If this insn is part of the prologue, emit DWARF v2 |
2956 | call frame info. */ | |
0021b564 | 2957 | if (RTX_FRAME_RELATED_P (insn) && dwarf2out_do_frame ()) |
469ac993 JM |
2958 | dwarf2out_frame_debug (insn); |
2959 | #endif | |
0021b564 JM |
2960 | #endif |
2961 | #endif | |
469ac993 | 2962 | |
3cf2715d DE |
2963 | #if 0 |
2964 | /* It's not at all clear why we did this and doing so interferes | |
2965 | with tests we'd like to do to use REG_WAS_0 notes, so let's try | |
2966 | with this out. */ | |
2967 | ||
2968 | /* Mark this insn as having been output. */ | |
2969 | INSN_DELETED_P (insn) = 1; | |
2970 | #endif | |
2971 | ||
2972 | debug_insn = 0; | |
2973 | } | |
2974 | } | |
2975 | return NEXT_INSN (insn); | |
2976 | } | |
2977 | \f | |
2978 | /* Output debugging info to the assembler file FILE | |
2979 | based on the NOTE-insn INSN, assumed to be a line number. */ | |
2980 | ||
2981 | static void | |
2982 | output_source_line (file, insn) | |
6a651371 | 2983 | FILE *file ATTRIBUTE_UNUSED; |
3cf2715d DE |
2984 | rtx insn; |
2985 | { | |
2986 | register char *filename = NOTE_SOURCE_FILE (insn); | |
2987 | ||
2988 | /* Remember filename for basic block profiling. | |
2989 | Filenames are allocated on the permanent obstack | |
2990 | or are passed in ARGV, so we don't have to save | |
2991 | the string. */ | |
2992 | ||
2993 | if (profile_block_flag && last_filename != filename) | |
2994 | bb_file_label_num = add_bb_string (filename, TRUE); | |
2995 | ||
2996 | last_filename = filename; | |
2997 | last_linenum = NOTE_LINE_NUMBER (insn); | |
eac40081 RK |
2998 | high_block_linenum = MAX (last_linenum, high_block_linenum); |
2999 | high_function_linenum = MAX (last_linenum, high_function_linenum); | |
3cf2715d DE |
3000 | |
3001 | if (write_symbols != NO_DEBUG) | |
3002 | { | |
3003 | #ifdef SDB_DEBUGGING_INFO | |
3004 | if (write_symbols == SDB_DEBUG | |
3005 | #if 0 /* People like having line numbers even in wrong file! */ | |
3006 | /* COFF can't handle multiple source files--lose, lose. */ | |
3007 | && !strcmp (filename, main_input_filename) | |
3008 | #endif | |
3009 | /* COFF relative line numbers must be positive. */ | |
3010 | && last_linenum > sdb_begin_function_line) | |
3011 | { | |
3012 | #ifdef ASM_OUTPUT_SOURCE_LINE | |
3013 | ASM_OUTPUT_SOURCE_LINE (file, last_linenum); | |
3014 | #else | |
3015 | fprintf (file, "\t.ln\t%d\n", | |
3016 | ((sdb_begin_function_line > -1) | |
3017 | ? last_linenum - sdb_begin_function_line : 1)); | |
3018 | #endif | |
3019 | } | |
3020 | #endif | |
3021 | ||
3022 | #if defined (DBX_DEBUGGING_INFO) | |
3023 | if (write_symbols == DBX_DEBUG) | |
3024 | dbxout_source_line (file, filename, NOTE_LINE_NUMBER (insn)); | |
3025 | #endif | |
3026 | ||
3027 | #if defined (XCOFF_DEBUGGING_INFO) | |
3028 | if (write_symbols == XCOFF_DEBUG) | |
3029 | xcoffout_source_line (file, filename, insn); | |
3030 | #endif | |
3031 | ||
3032 | #ifdef DWARF_DEBUGGING_INFO | |
3033 | if (write_symbols == DWARF_DEBUG) | |
3034 | dwarfout_line (filename, NOTE_LINE_NUMBER (insn)); | |
3035 | #endif | |
9a666dda JM |
3036 | |
3037 | #ifdef DWARF2_DEBUGGING_INFO | |
3038 | if (write_symbols == DWARF2_DEBUG) | |
3039 | dwarf2out_line (filename, NOTE_LINE_NUMBER (insn)); | |
3040 | #endif | |
3cf2715d DE |
3041 | } |
3042 | } | |
3043 | \f | |
0304f787 JL |
3044 | |
3045 | /* For each operand in INSN, simplify (subreg (reg)) so that it refers | |
3046 | directly to the desired hard register. */ | |
3047 | void | |
3048 | cleanup_subreg_operands (insn) | |
3049 | rtx insn; | |
3050 | { | |
f62a15e3 BS |
3051 | int i; |
3052 | ||
0eadeb15 | 3053 | extract_insn (insn); |
1ccbefce | 3054 | for (i = 0; i < recog_data.n_operands; i++) |
0304f787 | 3055 | { |
1ccbefce RH |
3056 | if (GET_CODE (recog_data.operand[i]) == SUBREG) |
3057 | recog_data.operand[i] = alter_subreg (recog_data.operand[i]); | |
3058 | else if (GET_CODE (recog_data.operand[i]) == PLUS | |
3059 | || GET_CODE (recog_data.operand[i]) == MULT) | |
3060 | recog_data.operand[i] = walk_alter_subreg (recog_data.operand[i]); | |
0304f787 JL |
3061 | } |
3062 | ||
1ccbefce | 3063 | for (i = 0; i < recog_data.n_dups; i++) |
0304f787 | 3064 | { |
1ccbefce RH |
3065 | if (GET_CODE (*recog_data.dup_loc[i]) == SUBREG) |
3066 | *recog_data.dup_loc[i] = alter_subreg (*recog_data.dup_loc[i]); | |
3067 | else if (GET_CODE (*recog_data.dup_loc[i]) == PLUS | |
3068 | || GET_CODE (*recog_data.dup_loc[i]) == MULT) | |
3069 | *recog_data.dup_loc[i] = walk_alter_subreg (*recog_data.dup_loc[i]); | |
0304f787 JL |
3070 | } |
3071 | } | |
3072 | ||
3cf2715d DE |
3073 | /* If X is a SUBREG, replace it with a REG or a MEM, |
3074 | based on the thing it is a subreg of. */ | |
3075 | ||
3076 | rtx | |
3077 | alter_subreg (x) | |
3078 | register rtx x; | |
3079 | { | |
3080 | register rtx y = SUBREG_REG (x); | |
f5963e61 | 3081 | |
3cf2715d DE |
3082 | if (GET_CODE (y) == SUBREG) |
3083 | y = alter_subreg (y); | |
3084 | ||
f5963e61 JL |
3085 | /* If reload is operating, we may be replacing inside this SUBREG. |
3086 | Check for that and make a new one if so. */ | |
3087 | if (reload_in_progress && find_replacement (&SUBREG_REG (x)) != 0) | |
3088 | x = copy_rtx (x); | |
3089 | ||
3cf2715d DE |
3090 | if (GET_CODE (y) == REG) |
3091 | { | |
ef178af3 | 3092 | int regno; |
ce4d78eb RH |
3093 | /* If the word size is larger than the size of this register, |
3094 | adjust the register number to compensate. */ | |
3095 | /* ??? Note that this just catches stragglers created by/for | |
3096 | integrate. It would be better if we either caught these | |
3097 | earlier, or kept _all_ subregs until now and eliminate | |
3098 | gen_lowpart and friends. */ | |
3099 | ||
ce4d78eb | 3100 | #ifdef ALTER_HARD_SUBREG |
ef178af3 ZW |
3101 | regno = ALTER_HARD_SUBREG(GET_MODE (x), SUBREG_WORD (x), |
3102 | GET_MODE (y), REGNO (y)); | |
ce4d78eb | 3103 | #else |
ef178af3 | 3104 | regno = REGNO (y) + SUBREG_WORD (x); |
ce4d78eb | 3105 | #endif |
ef178af3 ZW |
3106 | PUT_CODE (x, REG); |
3107 | REGNO (x) = regno; | |
0304f787 JL |
3108 | /* This field has a different meaning for REGs and SUBREGs. Make sure |
3109 | to clear it! */ | |
3110 | x->used = 0; | |
3cf2715d DE |
3111 | } |
3112 | else if (GET_CODE (y) == MEM) | |
3113 | { | |
3114 | register int offset = SUBREG_WORD (x) * UNITS_PER_WORD; | |
f76b9db2 ILT |
3115 | if (BYTES_BIG_ENDIAN) |
3116 | offset -= (MIN (UNITS_PER_WORD, GET_MODE_SIZE (GET_MODE (x))) | |
3117 | - MIN (UNITS_PER_WORD, GET_MODE_SIZE (GET_MODE (y)))); | |
3cf2715d | 3118 | PUT_CODE (x, MEM); |
c6df88cb | 3119 | MEM_COPY_ATTRIBUTES (x, y); |
41472af8 | 3120 | MEM_ALIAS_SET (x) = MEM_ALIAS_SET (y); |
3cf2715d DE |
3121 | XEXP (x, 0) = plus_constant (XEXP (y, 0), offset); |
3122 | } | |
3123 | ||
3124 | return x; | |
3125 | } | |
3126 | ||
3127 | /* Do alter_subreg on all the SUBREGs contained in X. */ | |
3128 | ||
3129 | static rtx | |
3130 | walk_alter_subreg (x) | |
3131 | rtx x; | |
3132 | { | |
3133 | switch (GET_CODE (x)) | |
3134 | { | |
3135 | case PLUS: | |
3136 | case MULT: | |
3137 | XEXP (x, 0) = walk_alter_subreg (XEXP (x, 0)); | |
3138 | XEXP (x, 1) = walk_alter_subreg (XEXP (x, 1)); | |
3139 | break; | |
3140 | ||
3141 | case MEM: | |
3142 | XEXP (x, 0) = walk_alter_subreg (XEXP (x, 0)); | |
3143 | break; | |
3144 | ||
3145 | case SUBREG: | |
3146 | return alter_subreg (x); | |
e9a25f70 JL |
3147 | |
3148 | default: | |
3149 | break; | |
3cf2715d DE |
3150 | } |
3151 | ||
3152 | return x; | |
3153 | } | |
3154 | \f | |
3155 | #ifdef HAVE_cc0 | |
3156 | ||
3157 | /* Given BODY, the body of a jump instruction, alter the jump condition | |
3158 | as required by the bits that are set in cc_status.flags. | |
3159 | Not all of the bits there can be handled at this level in all cases. | |
3160 | ||
3161 | The value is normally 0. | |
3162 | 1 means that the condition has become always true. | |
3163 | -1 means that the condition has become always false. | |
3164 | 2 means that COND has been altered. */ | |
3165 | ||
3166 | static int | |
3167 | alter_cond (cond) | |
3168 | register rtx cond; | |
3169 | { | |
3170 | int value = 0; | |
3171 | ||
3172 | if (cc_status.flags & CC_REVERSED) | |
3173 | { | |
3174 | value = 2; | |
3175 | PUT_CODE (cond, swap_condition (GET_CODE (cond))); | |
3176 | } | |
3177 | ||
3178 | if (cc_status.flags & CC_INVERTED) | |
3179 | { | |
3180 | value = 2; | |
3181 | PUT_CODE (cond, reverse_condition (GET_CODE (cond))); | |
3182 | } | |
3183 | ||
3184 | if (cc_status.flags & CC_NOT_POSITIVE) | |
3185 | switch (GET_CODE (cond)) | |
3186 | { | |
3187 | case LE: | |
3188 | case LEU: | |
3189 | case GEU: | |
3190 | /* Jump becomes unconditional. */ | |
3191 | return 1; | |
3192 | ||
3193 | case GT: | |
3194 | case GTU: | |
3195 | case LTU: | |
3196 | /* Jump becomes no-op. */ | |
3197 | return -1; | |
3198 | ||
3199 | case GE: | |
3200 | PUT_CODE (cond, EQ); | |
3201 | value = 2; | |
3202 | break; | |
3203 | ||
3204 | case LT: | |
3205 | PUT_CODE (cond, NE); | |
3206 | value = 2; | |
3207 | break; | |
e9a25f70 JL |
3208 | |
3209 | default: | |
3210 | break; | |
3cf2715d DE |
3211 | } |
3212 | ||
3213 | if (cc_status.flags & CC_NOT_NEGATIVE) | |
3214 | switch (GET_CODE (cond)) | |
3215 | { | |
3216 | case GE: | |
3217 | case GEU: | |
3218 | /* Jump becomes unconditional. */ | |
3219 | return 1; | |
3220 | ||
3221 | case LT: | |
3222 | case LTU: | |
3223 | /* Jump becomes no-op. */ | |
3224 | return -1; | |
3225 | ||
3226 | case LE: | |
3227 | case LEU: | |
3228 | PUT_CODE (cond, EQ); | |
3229 | value = 2; | |
3230 | break; | |
3231 | ||
3232 | case GT: | |
3233 | case GTU: | |
3234 | PUT_CODE (cond, NE); | |
3235 | value = 2; | |
3236 | break; | |
e9a25f70 JL |
3237 | |
3238 | default: | |
3239 | break; | |
3cf2715d DE |
3240 | } |
3241 | ||
3242 | if (cc_status.flags & CC_NO_OVERFLOW) | |
3243 | switch (GET_CODE (cond)) | |
3244 | { | |
3245 | case GEU: | |
3246 | /* Jump becomes unconditional. */ | |
3247 | return 1; | |
3248 | ||
3249 | case LEU: | |
3250 | PUT_CODE (cond, EQ); | |
3251 | value = 2; | |
3252 | break; | |
3253 | ||
3254 | case GTU: | |
3255 | PUT_CODE (cond, NE); | |
3256 | value = 2; | |
3257 | break; | |
3258 | ||
3259 | case LTU: | |
3260 | /* Jump becomes no-op. */ | |
3261 | return -1; | |
e9a25f70 JL |
3262 | |
3263 | default: | |
3264 | break; | |
3cf2715d DE |
3265 | } |
3266 | ||
3267 | if (cc_status.flags & (CC_Z_IN_NOT_N | CC_Z_IN_N)) | |
3268 | switch (GET_CODE (cond)) | |
3269 | { | |
e9a25f70 | 3270 | default: |
3cf2715d DE |
3271 | abort (); |
3272 | ||
3273 | case NE: | |
3274 | PUT_CODE (cond, cc_status.flags & CC_Z_IN_N ? GE : LT); | |
3275 | value = 2; | |
3276 | break; | |
3277 | ||
3278 | case EQ: | |
3279 | PUT_CODE (cond, cc_status.flags & CC_Z_IN_N ? LT : GE); | |
3280 | value = 2; | |
3281 | break; | |
3282 | } | |
3283 | ||
3284 | if (cc_status.flags & CC_NOT_SIGNED) | |
3285 | /* The flags are valid if signed condition operators are converted | |
3286 | to unsigned. */ | |
3287 | switch (GET_CODE (cond)) | |
3288 | { | |
3289 | case LE: | |
3290 | PUT_CODE (cond, LEU); | |
3291 | value = 2; | |
3292 | break; | |
3293 | ||
3294 | case LT: | |
3295 | PUT_CODE (cond, LTU); | |
3296 | value = 2; | |
3297 | break; | |
3298 | ||
3299 | case GT: | |
3300 | PUT_CODE (cond, GTU); | |
3301 | value = 2; | |
3302 | break; | |
3303 | ||
3304 | case GE: | |
3305 | PUT_CODE (cond, GEU); | |
3306 | value = 2; | |
3307 | break; | |
e9a25f70 JL |
3308 | |
3309 | default: | |
3310 | break; | |
3cf2715d DE |
3311 | } |
3312 | ||
3313 | return value; | |
3314 | } | |
3315 | #endif | |
3316 | \f | |
3317 | /* Report inconsistency between the assembler template and the operands. | |
3318 | In an `asm', it's the user's fault; otherwise, the compiler's fault. */ | |
3319 | ||
3320 | void | |
ab87f8c8 JL |
3321 | output_operand_lossage (msgid) |
3322 | const char *msgid; | |
3cf2715d DE |
3323 | { |
3324 | if (this_is_asm_operands) | |
ab87f8c8 | 3325 | error_for_asm (this_is_asm_operands, "invalid `asm': %s", _(msgid)); |
3cf2715d | 3326 | else |
987009bf ZW |
3327 | { |
3328 | error ("output_operand: %s", _(msgid)); | |
3329 | abort (); | |
3330 | } | |
3cf2715d DE |
3331 | } |
3332 | \f | |
3333 | /* Output of assembler code from a template, and its subroutines. */ | |
3334 | ||
3335 | /* Output text from TEMPLATE to the assembler output file, | |
3336 | obeying %-directions to substitute operands taken from | |
3337 | the vector OPERANDS. | |
3338 | ||
3339 | %N (for N a digit) means print operand N in usual manner. | |
3340 | %lN means require operand N to be a CODE_LABEL or LABEL_REF | |
3341 | and print the label name with no punctuation. | |
3342 | %cN means require operand N to be a constant | |
3343 | and print the constant expression with no punctuation. | |
3344 | %aN means expect operand N to be a memory address | |
3345 | (not a memory reference!) and print a reference | |
3346 | to that address. | |
3347 | %nN means expect operand N to be a constant | |
3348 | and print a constant expression for minus the value | |
3349 | of the operand, with no other punctuation. */ | |
3350 | ||
cb649530 RK |
3351 | static void |
3352 | output_asm_name () | |
3353 | { | |
3354 | if (flag_print_asm_name) | |
3355 | { | |
3356 | /* Annotate the assembly with a comment describing the pattern and | |
3357 | alternative used. */ | |
3358 | if (debug_insn) | |
3359 | { | |
3360 | register int num = INSN_CODE (debug_insn); | |
1db9f6ce | 3361 | fprintf (asm_out_file, "\t%s %d\t%s", |
cb649530 RK |
3362 | ASM_COMMENT_START, INSN_UID (debug_insn), insn_name[num]); |
3363 | if (insn_n_alternatives[num] > 1) | |
3364 | fprintf (asm_out_file, "/%d", which_alternative + 1); | |
1db9f6ce NC |
3365 | #ifdef HAVE_ATTR_length |
3366 | fprintf (asm_out_file, "\t[length = %d]", get_attr_length (debug_insn)); | |
3367 | #endif | |
cb649530 RK |
3368 | /* Clear this so only the first assembler insn |
3369 | of any rtl insn will get the special comment for -dp. */ | |
3370 | debug_insn = 0; | |
3371 | } | |
3372 | } | |
3373 | } | |
3374 | ||
3cf2715d DE |
3375 | void |
3376 | output_asm_insn (template, operands) | |
9b3142b3 | 3377 | const char *template; |
3cf2715d DE |
3378 | rtx *operands; |
3379 | { | |
9b3142b3 | 3380 | register const char *p; |
b729186a | 3381 | register int c; |
3cf2715d DE |
3382 | |
3383 | /* An insn may return a null string template | |
3384 | in a case where no assembler code is needed. */ | |
3385 | if (*template == 0) | |
3386 | return; | |
3387 | ||
3388 | p = template; | |
3389 | putc ('\t', asm_out_file); | |
3390 | ||
3391 | #ifdef ASM_OUTPUT_OPCODE | |
3392 | ASM_OUTPUT_OPCODE (asm_out_file, p); | |
3393 | #endif | |
3394 | ||
b729186a | 3395 | while ((c = *p++)) |
3cf2715d DE |
3396 | switch (c) |
3397 | { | |
3cf2715d | 3398 | case '\n': |
cb649530 | 3399 | output_asm_name (); |
3cf2715d | 3400 | putc (c, asm_out_file); |
cb649530 | 3401 | #ifdef ASM_OUTPUT_OPCODE |
3cf2715d DE |
3402 | while ((c = *p) == '\t') |
3403 | { | |
3404 | putc (c, asm_out_file); | |
3405 | p++; | |
3406 | } | |
3407 | ASM_OUTPUT_OPCODE (asm_out_file, p); | |
3cf2715d | 3408 | #endif |
cb649530 | 3409 | break; |
3cf2715d DE |
3410 | |
3411 | #ifdef ASSEMBLER_DIALECT | |
3412 | case '{': | |
b729186a JL |
3413 | { |
3414 | register int i; | |
3415 | ||
3416 | /* If we want the first dialect, do nothing. Otherwise, skip | |
3417 | DIALECT_NUMBER of strings ending with '|'. */ | |
3418 | for (i = 0; i < dialect_number; i++) | |
3419 | { | |
463a8384 | 3420 | while (*p && *p != '}' && *p++ != '|') |
b729186a | 3421 | ; |
463a8384 BS |
3422 | if (*p == '}') |
3423 | break; | |
b729186a JL |
3424 | if (*p == '|') |
3425 | p++; | |
3426 | } | |
3427 | } | |
3cf2715d DE |
3428 | break; |
3429 | ||
3430 | case '|': | |
3431 | /* Skip to close brace. */ | |
3432 | while (*p && *p++ != '}') | |
3433 | ; | |
3434 | break; | |
3435 | ||
3436 | case '}': | |
3437 | break; | |
3438 | #endif | |
3439 | ||
3440 | case '%': | |
3441 | /* %% outputs a single %. */ | |
3442 | if (*p == '%') | |
3443 | { | |
3444 | p++; | |
3445 | putc (c, asm_out_file); | |
3446 | } | |
3447 | /* %= outputs a number which is unique to each insn in the entire | |
3448 | compilation. This is useful for making local labels that are | |
3449 | referred to more than once in a given insn. */ | |
3450 | else if (*p == '=') | |
3451 | { | |
3452 | p++; | |
3453 | fprintf (asm_out_file, "%d", insn_counter); | |
3454 | } | |
3455 | /* % followed by a letter and some digits | |
3456 | outputs an operand in a special way depending on the letter. | |
3457 | Letters `acln' are implemented directly. | |
3458 | Other letters are passed to `output_operand' so that | |
3459 | the PRINT_OPERAND macro can define them. */ | |
3460 | else if ((*p >= 'a' && *p <= 'z') | |
3461 | || (*p >= 'A' && *p <= 'Z')) | |
3462 | { | |
3463 | int letter = *p++; | |
3464 | c = atoi (p); | |
3465 | ||
3466 | if (! (*p >= '0' && *p <= '9')) | |
3467 | output_operand_lossage ("operand number missing after %-letter"); | |
22bf4422 | 3468 | else if (this_is_asm_operands && (c < 0 || (unsigned int) c >= insn_noperands)) |
3cf2715d DE |
3469 | output_operand_lossage ("operand number out of range"); |
3470 | else if (letter == 'l') | |
3471 | output_asm_label (operands[c]); | |
3472 | else if (letter == 'a') | |
3473 | output_address (operands[c]); | |
3474 | else if (letter == 'c') | |
3475 | { | |
3476 | if (CONSTANT_ADDRESS_P (operands[c])) | |
3477 | output_addr_const (asm_out_file, operands[c]); | |
3478 | else | |
3479 | output_operand (operands[c], 'c'); | |
3480 | } | |
3481 | else if (letter == 'n') | |
3482 | { | |
3483 | if (GET_CODE (operands[c]) == CONST_INT) | |
21e3a81b | 3484 | fprintf (asm_out_file, HOST_WIDE_INT_PRINT_DEC, |
3cf2715d DE |
3485 | - INTVAL (operands[c])); |
3486 | else | |
3487 | { | |
3488 | putc ('-', asm_out_file); | |
3489 | output_addr_const (asm_out_file, operands[c]); | |
3490 | } | |
3491 | } | |
3492 | else | |
3493 | output_operand (operands[c], letter); | |
3494 | ||
3495 | while ((c = *p) >= '0' && c <= '9') p++; | |
3496 | } | |
3497 | /* % followed by a digit outputs an operand the default way. */ | |
3498 | else if (*p >= '0' && *p <= '9') | |
3499 | { | |
3500 | c = atoi (p); | |
22bf4422 | 3501 | if (this_is_asm_operands && (c < 0 || (unsigned int) c >= insn_noperands)) |
3cf2715d DE |
3502 | output_operand_lossage ("operand number out of range"); |
3503 | else | |
3504 | output_operand (operands[c], 0); | |
3505 | while ((c = *p) >= '0' && c <= '9') p++; | |
3506 | } | |
3507 | /* % followed by punctuation: output something for that | |
3508 | punctuation character alone, with no operand. | |
3509 | The PRINT_OPERAND macro decides what is actually done. */ | |
3510 | #ifdef PRINT_OPERAND_PUNCT_VALID_P | |
973838fd | 3511 | else if (PRINT_OPERAND_PUNCT_VALID_P ((unsigned char)*p)) |
3cf2715d DE |
3512 | output_operand (NULL_RTX, *p++); |
3513 | #endif | |
3514 | else | |
3515 | output_operand_lossage ("invalid %%-code"); | |
3516 | break; | |
3517 | ||
3518 | default: | |
3519 | putc (c, asm_out_file); | |
3520 | } | |
3521 | ||
cb649530 | 3522 | output_asm_name (); |
3cf2715d DE |
3523 | |
3524 | putc ('\n', asm_out_file); | |
3525 | } | |
3526 | \f | |
3527 | /* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol. */ | |
3528 | ||
3529 | void | |
3530 | output_asm_label (x) | |
3531 | rtx x; | |
3532 | { | |
3533 | char buf[256]; | |
3534 | ||
3535 | if (GET_CODE (x) == LABEL_REF) | |
3536 | ASM_GENERATE_INTERNAL_LABEL (buf, "L", CODE_LABEL_NUMBER (XEXP (x, 0))); | |
3537 | else if (GET_CODE (x) == CODE_LABEL) | |
3538 | ASM_GENERATE_INTERNAL_LABEL (buf, "L", CODE_LABEL_NUMBER (x)); | |
3539 | else | |
3540 | output_operand_lossage ("`%l' operand isn't a label"); | |
3541 | ||
3542 | assemble_name (asm_out_file, buf); | |
3543 | } | |
3544 | ||
3545 | /* Print operand X using machine-dependent assembler syntax. | |
3546 | The macro PRINT_OPERAND is defined just to control this function. | |
3547 | CODE is a non-digit that preceded the operand-number in the % spec, | |
3548 | such as 'z' if the spec was `%z3'. CODE is 0 if there was no char | |
3549 | between the % and the digits. | |
3550 | When CODE is a non-letter, X is 0. | |
3551 | ||
3552 | The meanings of the letters are machine-dependent and controlled | |
3553 | by PRINT_OPERAND. */ | |
3554 | ||
3555 | static void | |
3556 | output_operand (x, code) | |
3557 | rtx x; | |
3558 | int code; | |
3559 | { | |
3560 | if (x && GET_CODE (x) == SUBREG) | |
3561 | x = alter_subreg (x); | |
3562 | ||
3563 | /* If X is a pseudo-register, abort now rather than writing trash to the | |
3564 | assembler file. */ | |
3565 | ||
3566 | if (x && GET_CODE (x) == REG && REGNO (x) >= FIRST_PSEUDO_REGISTER) | |
3567 | abort (); | |
3568 | ||
3569 | PRINT_OPERAND (asm_out_file, x, code); | |
3570 | } | |
3571 | ||
3572 | /* Print a memory reference operand for address X | |
3573 | using machine-dependent assembler syntax. | |
3574 | The macro PRINT_OPERAND_ADDRESS exists just to control this function. */ | |
3575 | ||
3576 | void | |
3577 | output_address (x) | |
3578 | rtx x; | |
3579 | { | |
3580 | walk_alter_subreg (x); | |
3581 | PRINT_OPERAND_ADDRESS (asm_out_file, x); | |
3582 | } | |
3583 | \f | |
3584 | /* Print an integer constant expression in assembler syntax. | |
3585 | Addition and subtraction are the only arithmetic | |
3586 | that may appear in these expressions. */ | |
3587 | ||
3588 | void | |
3589 | output_addr_const (file, x) | |
3590 | FILE *file; | |
3591 | rtx x; | |
3592 | { | |
3593 | char buf[256]; | |
3594 | ||
3595 | restart: | |
3596 | switch (GET_CODE (x)) | |
3597 | { | |
3598 | case PC: | |
3599 | if (flag_pic) | |
3600 | putc ('.', file); | |
3601 | else | |
3602 | abort (); | |
3603 | break; | |
3604 | ||
3605 | case SYMBOL_REF: | |
3606 | assemble_name (file, XSTR (x, 0)); | |
3607 | break; | |
3608 | ||
3609 | case LABEL_REF: | |
3610 | ASM_GENERATE_INTERNAL_LABEL (buf, "L", CODE_LABEL_NUMBER (XEXP (x, 0))); | |
3611 | assemble_name (file, buf); | |
3612 | break; | |
3613 | ||
3614 | case CODE_LABEL: | |
3615 | ASM_GENERATE_INTERNAL_LABEL (buf, "L", CODE_LABEL_NUMBER (x)); | |
3616 | assemble_name (file, buf); | |
3617 | break; | |
3618 | ||
3619 | case CONST_INT: | |
21e3a81b | 3620 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x)); |
3cf2715d DE |
3621 | break; |
3622 | ||
3623 | case CONST: | |
3624 | /* This used to output parentheses around the expression, | |
3625 | but that does not work on the 386 (either ATT or BSD assembler). */ | |
3626 | output_addr_const (file, XEXP (x, 0)); | |
3627 | break; | |
3628 | ||
3629 | case CONST_DOUBLE: | |
3630 | if (GET_MODE (x) == VOIDmode) | |
3631 | { | |
3632 | /* We can use %d if the number is one word and positive. */ | |
3633 | if (CONST_DOUBLE_HIGH (x)) | |
21e3a81b | 3634 | fprintf (file, HOST_WIDE_INT_PRINT_DOUBLE_HEX, |
3cf2715d DE |
3635 | CONST_DOUBLE_HIGH (x), CONST_DOUBLE_LOW (x)); |
3636 | else if (CONST_DOUBLE_LOW (x) < 0) | |
21e3a81b | 3637 | fprintf (file, HOST_WIDE_INT_PRINT_HEX, CONST_DOUBLE_LOW (x)); |
3cf2715d | 3638 | else |
21e3a81b | 3639 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, CONST_DOUBLE_LOW (x)); |
3cf2715d DE |
3640 | } |
3641 | else | |
3642 | /* We can't handle floating point constants; | |
3643 | PRINT_OPERAND must handle them. */ | |
3644 | output_operand_lossage ("floating constant misused"); | |
3645 | break; | |
3646 | ||
3647 | case PLUS: | |
3648 | /* Some assemblers need integer constants to appear last (eg masm). */ | |
3649 | if (GET_CODE (XEXP (x, 0)) == CONST_INT) | |
3650 | { | |
3651 | output_addr_const (file, XEXP (x, 1)); | |
3652 | if (INTVAL (XEXP (x, 0)) >= 0) | |
3653 | fprintf (file, "+"); | |
3654 | output_addr_const (file, XEXP (x, 0)); | |
3655 | } | |
3656 | else | |
3657 | { | |
3658 | output_addr_const (file, XEXP (x, 0)); | |
3659 | if (INTVAL (XEXP (x, 1)) >= 0) | |
3660 | fprintf (file, "+"); | |
3661 | output_addr_const (file, XEXP (x, 1)); | |
3662 | } | |
3663 | break; | |
3664 | ||
3665 | case MINUS: | |
3666 | /* Avoid outputting things like x-x or x+5-x, | |
3667 | since some assemblers can't handle that. */ | |
3668 | x = simplify_subtraction (x); | |
3669 | if (GET_CODE (x) != MINUS) | |
3670 | goto restart; | |
3671 | ||
3672 | output_addr_const (file, XEXP (x, 0)); | |
3673 | fprintf (file, "-"); | |
3674 | if (GET_CODE (XEXP (x, 1)) == CONST_INT | |
3675 | && INTVAL (XEXP (x, 1)) < 0) | |
3676 | { | |
b6c8689d | 3677 | fprintf (file, "%s", ASM_OPEN_PAREN); |
3cf2715d | 3678 | output_addr_const (file, XEXP (x, 1)); |
b6c8689d | 3679 | fprintf (file, "%s", ASM_CLOSE_PAREN); |
3cf2715d DE |
3680 | } |
3681 | else | |
3682 | output_addr_const (file, XEXP (x, 1)); | |
3683 | break; | |
3684 | ||
3685 | case ZERO_EXTEND: | |
3686 | case SIGN_EXTEND: | |
3687 | output_addr_const (file, XEXP (x, 0)); | |
3688 | break; | |
3689 | ||
3690 | default: | |
3691 | output_operand_lossage ("invalid expression as operand"); | |
3692 | } | |
3693 | } | |
3694 | \f | |
3695 | /* A poor man's fprintf, with the added features of %I, %R, %L, and %U. | |
3696 | %R prints the value of REGISTER_PREFIX. | |
3697 | %L prints the value of LOCAL_LABEL_PREFIX. | |
3698 | %U prints the value of USER_LABEL_PREFIX. | |
3699 | %I prints the value of IMMEDIATE_PREFIX. | |
3700 | %O runs ASM_OUTPUT_OPCODE to transform what follows in the string. | |
3701 | Also supported are %d, %x, %s, %e, %f, %g and %%. | |
3702 | ||
3703 | We handle alternate assembler dialects here, just like output_asm_insn. */ | |
3704 | ||
3705 | void | |
87e11268 | 3706 | asm_fprintf VPROTO((FILE *file, const char *p, ...)) |
3cf2715d | 3707 | { |
5148a72b | 3708 | #ifndef ANSI_PROTOTYPES |
3cf2715d | 3709 | FILE *file; |
87e11268 | 3710 | const char *p; |
3cf2715d DE |
3711 | #endif |
3712 | va_list argptr; | |
3713 | char buf[10]; | |
3714 | char *q, c; | |
3cf2715d DE |
3715 | |
3716 | VA_START (argptr, p); | |
3717 | ||
5148a72b | 3718 | #ifndef ANSI_PROTOTYPES |
0f41302f | 3719 | file = va_arg (argptr, FILE *); |
87e11268 | 3720 | p = va_arg (argptr, const char *); |
3cf2715d DE |
3721 | #endif |
3722 | ||
3723 | buf[0] = '%'; | |
3724 | ||
b729186a | 3725 | while ((c = *p++)) |
3cf2715d DE |
3726 | switch (c) |
3727 | { | |
3728 | #ifdef ASSEMBLER_DIALECT | |
3729 | case '{': | |
b729186a JL |
3730 | { |
3731 | int i; | |
3cf2715d | 3732 | |
b729186a JL |
3733 | /* If we want the first dialect, do nothing. Otherwise, skip |
3734 | DIALECT_NUMBER of strings ending with '|'. */ | |
3735 | for (i = 0; i < dialect_number; i++) | |
3736 | { | |
3737 | while (*p && *p++ != '|') | |
3738 | ; | |
3739 | ||
3740 | if (*p == '|') | |
3741 | p++; | |
3cf2715d | 3742 | } |
b729186a | 3743 | } |
3cf2715d DE |
3744 | break; |
3745 | ||
3746 | case '|': | |
3747 | /* Skip to close brace. */ | |
3748 | while (*p && *p++ != '}') | |
3749 | ; | |
3750 | break; | |
3751 | ||
3752 | case '}': | |
3753 | break; | |
3754 | #endif | |
3755 | ||
3756 | case '%': | |
3757 | c = *p++; | |
3758 | q = &buf[1]; | |
3759 | while ((c >= '0' && c <= '9') || c == '.') | |
3760 | { | |
3761 | *q++ = c; | |
3762 | c = *p++; | |
3763 | } | |
3764 | switch (c) | |
3765 | { | |
3766 | case '%': | |
3767 | fprintf (file, "%%"); | |
3768 | break; | |
3769 | ||
3770 | case 'd': case 'i': case 'u': | |
3771 | case 'x': case 'p': case 'X': | |
3772 | case 'o': | |
3773 | *q++ = c; | |
3774 | *q = 0; | |
3775 | fprintf (file, buf, va_arg (argptr, int)); | |
3776 | break; | |
3777 | ||
3778 | case 'w': | |
3779 | /* This is a prefix to the 'd', 'i', 'u', 'x', 'p', and 'X' cases, | |
3780 | but we do not check for those cases. It means that the value | |
3781 | is a HOST_WIDE_INT, which may be either `int' or `long'. */ | |
3782 | ||
21e3a81b RK |
3783 | #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT |
3784 | #else | |
3785 | #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG | |
3786 | *q++ = 'l'; | |
3787 | #else | |
3788 | *q++ = 'l'; | |
3cf2715d | 3789 | *q++ = 'l'; |
21e3a81b | 3790 | #endif |
3cf2715d DE |
3791 | #endif |
3792 | ||
3793 | *q++ = *p++; | |
3794 | *q = 0; | |
3795 | fprintf (file, buf, va_arg (argptr, HOST_WIDE_INT)); | |
3796 | break; | |
3797 | ||
3798 | case 'l': | |
3799 | *q++ = c; | |
3800 | *q++ = *p++; | |
3801 | *q = 0; | |
3802 | fprintf (file, buf, va_arg (argptr, long)); | |
3803 | break; | |
3804 | ||
3805 | case 'e': | |
3806 | case 'f': | |
3807 | case 'g': | |
3808 | *q++ = c; | |
3809 | *q = 0; | |
3810 | fprintf (file, buf, va_arg (argptr, double)); | |
3811 | break; | |
3812 | ||
3813 | case 's': | |
3814 | *q++ = c; | |
3815 | *q = 0; | |
3816 | fprintf (file, buf, va_arg (argptr, char *)); | |
3817 | break; | |
3818 | ||
3819 | case 'O': | |
3820 | #ifdef ASM_OUTPUT_OPCODE | |
3821 | ASM_OUTPUT_OPCODE (asm_out_file, p); | |
3822 | #endif | |
3823 | break; | |
3824 | ||
3825 | case 'R': | |
3826 | #ifdef REGISTER_PREFIX | |
3827 | fprintf (file, "%s", REGISTER_PREFIX); | |
3828 | #endif | |
3829 | break; | |
3830 | ||
3831 | case 'I': | |
3832 | #ifdef IMMEDIATE_PREFIX | |
3833 | fprintf (file, "%s", IMMEDIATE_PREFIX); | |
3834 | #endif | |
3835 | break; | |
3836 | ||
3837 | case 'L': | |
3838 | #ifdef LOCAL_LABEL_PREFIX | |
3839 | fprintf (file, "%s", LOCAL_LABEL_PREFIX); | |
3840 | #endif | |
3841 | break; | |
3842 | ||
3843 | case 'U': | |
19283265 | 3844 | fputs (user_label_prefix, file); |
3cf2715d DE |
3845 | break; |
3846 | ||
fe0503ea NC |
3847 | #ifdef ASM_FPRINTF_EXTENSIONS |
3848 | /* Upper case letters are reserved for general use by asm_fprintf | |
3849 | and so are not available to target specific code. In order to | |
3850 | prevent the ASM_FPRINTF_EXTENSIONS macro from using them then, | |
3851 | they are defined here. As they get turned into real extensions | |
3852 | to asm_fprintf they should be removed from this list. */ | |
3853 | case 'A': case 'B': case 'C': case 'D': case 'E': | |
3854 | case 'F': case 'G': case 'H': case 'J': case 'K': | |
3855 | case 'M': case 'N': case 'P': case 'Q': case 'S': | |
3856 | case 'T': case 'V': case 'W': case 'Y': case 'Z': | |
3857 | break; | |
3858 | ||
3859 | ASM_FPRINTF_EXTENSIONS (file, argptr, p) | |
3860 | #endif | |
3cf2715d DE |
3861 | default: |
3862 | abort (); | |
3863 | } | |
3864 | break; | |
3865 | ||
3866 | default: | |
3867 | fputc (c, file); | |
3868 | } | |
3869 | } | |
3870 | \f | |
3871 | /* Split up a CONST_DOUBLE or integer constant rtx | |
3872 | into two rtx's for single words, | |
3873 | storing in *FIRST the word that comes first in memory in the target | |
3874 | and in *SECOND the other. */ | |
3875 | ||
3876 | void | |
3877 | split_double (value, first, second) | |
3878 | rtx value; | |
3879 | rtx *first, *second; | |
3880 | { | |
3881 | if (GET_CODE (value) == CONST_INT) | |
3882 | { | |
5a1a6efd | 3883 | if (HOST_BITS_PER_WIDE_INT >= (2 * BITS_PER_WORD)) |
f76b9db2 | 3884 | { |
5a1a6efd | 3885 | /* In this case the CONST_INT holds both target words. |
27eef9ce JC |
3886 | Extract the bits from it into two word-sized pieces. |
3887 | Sign extend each half to HOST_WIDE_INT. */ | |
5a1a6efd | 3888 | rtx low, high; |
563c063f MM |
3889 | /* On machines where HOST_BITS_PER_WIDE_INT == BITS_PER_WORD |
3890 | the shift below will cause a compiler warning, even though | |
3891 | this code won't be executed. So put the shift amounts in | |
3892 | variables to avoid the warning. */ | |
3893 | int rshift = HOST_BITS_PER_WIDE_INT - BITS_PER_WORD; | |
3894 | int lshift = HOST_BITS_PER_WIDE_INT - 2 * BITS_PER_WORD; | |
3895 | ||
3896 | low = GEN_INT ((INTVAL (value) << rshift) >> rshift); | |
3897 | high = GEN_INT ((INTVAL (value) << lshift) >> rshift); | |
5a1a6efd RK |
3898 | if (WORDS_BIG_ENDIAN) |
3899 | { | |
3900 | *first = high; | |
3901 | *second = low; | |
3902 | } | |
3903 | else | |
3904 | { | |
3905 | *first = low; | |
3906 | *second = high; | |
3907 | } | |
f76b9db2 ILT |
3908 | } |
3909 | else | |
3910 | { | |
5a1a6efd RK |
3911 | /* The rule for using CONST_INT for a wider mode |
3912 | is that we regard the value as signed. | |
3913 | So sign-extend it. */ | |
3914 | rtx high = (INTVAL (value) < 0 ? constm1_rtx : const0_rtx); | |
3915 | if (WORDS_BIG_ENDIAN) | |
3916 | { | |
3917 | *first = high; | |
3918 | *second = value; | |
3919 | } | |
3920 | else | |
3921 | { | |
3922 | *first = value; | |
3923 | *second = high; | |
3924 | } | |
f76b9db2 | 3925 | } |
3cf2715d DE |
3926 | } |
3927 | else if (GET_CODE (value) != CONST_DOUBLE) | |
3928 | { | |
f76b9db2 ILT |
3929 | if (WORDS_BIG_ENDIAN) |
3930 | { | |
3931 | *first = const0_rtx; | |
3932 | *second = value; | |
3933 | } | |
3934 | else | |
3935 | { | |
3936 | *first = value; | |
3937 | *second = const0_rtx; | |
3938 | } | |
3cf2715d DE |
3939 | } |
3940 | else if (GET_MODE (value) == VOIDmode | |
3941 | /* This is the old way we did CONST_DOUBLE integers. */ | |
3942 | || GET_MODE_CLASS (GET_MODE (value)) == MODE_INT) | |
3943 | { | |
3944 | /* In an integer, the words are defined as most and least significant. | |
3945 | So order them by the target's convention. */ | |
f76b9db2 ILT |
3946 | if (WORDS_BIG_ENDIAN) |
3947 | { | |
3948 | *first = GEN_INT (CONST_DOUBLE_HIGH (value)); | |
3949 | *second = GEN_INT (CONST_DOUBLE_LOW (value)); | |
3950 | } | |
3951 | else | |
3952 | { | |
3953 | *first = GEN_INT (CONST_DOUBLE_LOW (value)); | |
3954 | *second = GEN_INT (CONST_DOUBLE_HIGH (value)); | |
3955 | } | |
3cf2715d DE |
3956 | } |
3957 | else | |
3958 | { | |
3959 | #ifdef REAL_ARITHMETIC | |
3960 | REAL_VALUE_TYPE r; long l[2]; | |
3961 | REAL_VALUE_FROM_CONST_DOUBLE (r, value); | |
3962 | ||
3963 | /* Note, this converts the REAL_VALUE_TYPE to the target's | |
3964 | format, splits up the floating point double and outputs | |
3965 | exactly 32 bits of it into each of l[0] and l[1] -- | |
0f41302f | 3966 | not necessarily BITS_PER_WORD bits. */ |
3cf2715d DE |
3967 | REAL_VALUE_TO_TARGET_DOUBLE (r, l); |
3968 | ||
b5a3eb84 JW |
3969 | /* If 32 bits is an entire word for the target, but not for the host, |
3970 | then sign-extend on the host so that the number will look the same | |
3971 | way on the host that it would on the target. See for instance | |
3972 | simplify_unary_operation. The #if is needed to avoid compiler | |
3973 | warnings. */ | |
3974 | ||
3975 | #if HOST_BITS_PER_LONG > 32 | |
3976 | if (BITS_PER_WORD < HOST_BITS_PER_LONG && BITS_PER_WORD == 32) | |
3977 | { | |
3978 | if (l[0] & ((long) 1 << 31)) | |
3979 | l[0] |= ((long) (-1) << 32); | |
3980 | if (l[1] & ((long) 1 << 31)) | |
3981 | l[1] |= ((long) (-1) << 32); | |
3982 | } | |
3983 | #endif | |
3984 | ||
3cf2715d DE |
3985 | *first = GEN_INT ((HOST_WIDE_INT) l[0]); |
3986 | *second = GEN_INT ((HOST_WIDE_INT) l[1]); | |
3987 | #else | |
3988 | if ((HOST_FLOAT_FORMAT != TARGET_FLOAT_FORMAT | |
3989 | || HOST_BITS_PER_WIDE_INT != BITS_PER_WORD) | |
3990 | && ! flag_pretend_float) | |
3991 | abort (); | |
3992 | ||
f76b9db2 ILT |
3993 | if ( |
3994 | #ifdef HOST_WORDS_BIG_ENDIAN | |
3995 | WORDS_BIG_ENDIAN | |
3cf2715d | 3996 | #else |
f76b9db2 | 3997 | ! WORDS_BIG_ENDIAN |
3cf2715d | 3998 | #endif |
f76b9db2 ILT |
3999 | ) |
4000 | { | |
4001 | /* Host and target agree => no need to swap. */ | |
4002 | *first = GEN_INT (CONST_DOUBLE_LOW (value)); | |
4003 | *second = GEN_INT (CONST_DOUBLE_HIGH (value)); | |
4004 | } | |
4005 | else | |
4006 | { | |
4007 | *second = GEN_INT (CONST_DOUBLE_LOW (value)); | |
4008 | *first = GEN_INT (CONST_DOUBLE_HIGH (value)); | |
4009 | } | |
3cf2715d DE |
4010 | #endif /* no REAL_ARITHMETIC */ |
4011 | } | |
4012 | } | |
4013 | \f | |
4014 | /* Return nonzero if this function has no function calls. */ | |
4015 | ||
4016 | int | |
4017 | leaf_function_p () | |
4018 | { | |
4019 | rtx insn; | |
4020 | ||
9e2f9a7f | 4021 | if (profile_flag || profile_block_flag || profile_arc_flag) |
3cf2715d DE |
4022 | return 0; |
4023 | ||
4024 | for (insn = get_insns (); insn; insn = NEXT_INSN (insn)) | |
4025 | { | |
4026 | if (GET_CODE (insn) == CALL_INSN) | |
4027 | return 0; | |
4028 | if (GET_CODE (insn) == INSN | |
4029 | && GET_CODE (PATTERN (insn)) == SEQUENCE | |
4030 | && GET_CODE (XVECEXP (PATTERN (insn), 0, 0)) == CALL_INSN) | |
4031 | return 0; | |
4032 | } | |
4033 | for (insn = current_function_epilogue_delay_list; insn; insn = XEXP (insn, 1)) | |
4034 | { | |
4035 | if (GET_CODE (XEXP (insn, 0)) == CALL_INSN) | |
4036 | return 0; | |
4037 | if (GET_CODE (XEXP (insn, 0)) == INSN | |
4038 | && GET_CODE (PATTERN (XEXP (insn, 0))) == SEQUENCE | |
4039 | && GET_CODE (XVECEXP (PATTERN (XEXP (insn, 0)), 0, 0)) == CALL_INSN) | |
4040 | return 0; | |
4041 | } | |
4042 | ||
4043 | return 1; | |
4044 | } | |
4045 | ||
4046 | /* On some machines, a function with no call insns | |
4047 | can run faster if it doesn't create its own register window. | |
4048 | When output, the leaf function should use only the "output" | |
4049 | registers. Ordinarily, the function would be compiled to use | |
4050 | the "input" registers to find its arguments; it is a candidate | |
4051 | for leaf treatment if it uses only the "input" registers. | |
4052 | Leaf function treatment means renumbering so the function | |
4053 | uses the "output" registers instead. */ | |
4054 | ||
4055 | #ifdef LEAF_REGISTERS | |
4056 | ||
4057 | static char permitted_reg_in_leaf_functions[] = LEAF_REGISTERS; | |
4058 | ||
4059 | /* Return 1 if this function uses only the registers that can be | |
4060 | safely renumbered. */ | |
4061 | ||
4062 | int | |
4063 | only_leaf_regs_used () | |
4064 | { | |
4065 | int i; | |
4066 | ||
4067 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
e5e809f4 JL |
4068 | if ((regs_ever_live[i] || global_regs[i]) |
4069 | && ! permitted_reg_in_leaf_functions[i]) | |
4070 | return 0; | |
4071 | ||
4072 | if (current_function_uses_pic_offset_table | |
4073 | && pic_offset_table_rtx != 0 | |
4074 | && GET_CODE (pic_offset_table_rtx) == REG | |
4075 | && ! permitted_reg_in_leaf_functions[REGNO (pic_offset_table_rtx)]) | |
4076 | return 0; | |
4077 | ||
3cf2715d DE |
4078 | return 1; |
4079 | } | |
4080 | ||
4081 | /* Scan all instructions and renumber all registers into those | |
4082 | available in leaf functions. */ | |
4083 | ||
4084 | static void | |
4085 | leaf_renumber_regs (first) | |
4086 | rtx first; | |
4087 | { | |
4088 | rtx insn; | |
4089 | ||
4090 | /* Renumber only the actual patterns. | |
4091 | The reg-notes can contain frame pointer refs, | |
4092 | and renumbering them could crash, and should not be needed. */ | |
4093 | for (insn = first; insn; insn = NEXT_INSN (insn)) | |
4094 | if (GET_RTX_CLASS (GET_CODE (insn)) == 'i') | |
4095 | leaf_renumber_regs_insn (PATTERN (insn)); | |
4096 | for (insn = current_function_epilogue_delay_list; insn; insn = XEXP (insn, 1)) | |
4097 | if (GET_RTX_CLASS (GET_CODE (XEXP (insn, 0))) == 'i') | |
4098 | leaf_renumber_regs_insn (PATTERN (XEXP (insn, 0))); | |
4099 | } | |
4100 | ||
4101 | /* Scan IN_RTX and its subexpressions, and renumber all regs into those | |
4102 | available in leaf functions. */ | |
4103 | ||
4104 | void | |
4105 | leaf_renumber_regs_insn (in_rtx) | |
4106 | register rtx in_rtx; | |
4107 | { | |
4108 | register int i, j; | |
6f7d635c | 4109 | register const char *format_ptr; |
3cf2715d DE |
4110 | |
4111 | if (in_rtx == 0) | |
4112 | return; | |
4113 | ||
4114 | /* Renumber all input-registers into output-registers. | |
4115 | renumbered_regs would be 1 for an output-register; | |
4116 | they */ | |
4117 | ||
4118 | if (GET_CODE (in_rtx) == REG) | |
4119 | { | |
4120 | int newreg; | |
4121 | ||
4122 | /* Don't renumber the same reg twice. */ | |
4123 | if (in_rtx->used) | |
4124 | return; | |
4125 | ||
4126 | newreg = REGNO (in_rtx); | |
4127 | /* Don't try to renumber pseudo regs. It is possible for a pseudo reg | |
4128 | to reach here as part of a REG_NOTE. */ | |
4129 | if (newreg >= FIRST_PSEUDO_REGISTER) | |
4130 | { | |
4131 | in_rtx->used = 1; | |
4132 | return; | |
4133 | } | |
4134 | newreg = LEAF_REG_REMAP (newreg); | |
4135 | if (newreg < 0) | |
4136 | abort (); | |
4137 | regs_ever_live[REGNO (in_rtx)] = 0; | |
4138 | regs_ever_live[newreg] = 1; | |
4139 | REGNO (in_rtx) = newreg; | |
4140 | in_rtx->used = 1; | |
4141 | } | |
4142 | ||
4143 | if (GET_RTX_CLASS (GET_CODE (in_rtx)) == 'i') | |
4144 | { | |
4145 | /* Inside a SEQUENCE, we find insns. | |
4146 | Renumber just the patterns of these insns, | |
4147 | just as we do for the top-level insns. */ | |
4148 | leaf_renumber_regs_insn (PATTERN (in_rtx)); | |
4149 | return; | |
4150 | } | |
4151 | ||
4152 | format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)); | |
4153 | ||
4154 | for (i = 0; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++) | |
4155 | switch (*format_ptr++) | |
4156 | { | |
4157 | case 'e': | |
4158 | leaf_renumber_regs_insn (XEXP (in_rtx, i)); | |
4159 | break; | |
4160 | ||
4161 | case 'E': | |
4162 | if (NULL != XVEC (in_rtx, i)) | |
4163 | { | |
4164 | for (j = 0; j < XVECLEN (in_rtx, i); j++) | |
4165 | leaf_renumber_regs_insn (XVECEXP (in_rtx, i, j)); | |
4166 | } | |
4167 | break; | |
4168 | ||
4169 | case 'S': | |
4170 | case 's': | |
4171 | case '0': | |
4172 | case 'i': | |
4173 | case 'w': | |
4174 | case 'n': | |
4175 | case 'u': | |
4176 | break; | |
4177 | ||
4178 | default: | |
4179 | abort (); | |
4180 | } | |
4181 | } | |
4182 | #endif |