Line data Source code
1 : /* Scanning of rtl for dataflow analysis.
2 : Copyright (C) 1999-2026 Free Software Foundation, Inc.
3 : Originally contributed by Michael P. Hayes
4 : (m.hayes@elec.canterbury.ac.nz, mhayes@redhat.com)
5 : Major rewrite contributed by Danny Berlin (dberlin@dberlin.org)
6 : and Kenneth Zadeck (zadeck@naturalbridge.com).
7 :
8 : This file is part of GCC.
9 :
10 : GCC is free software; you can redistribute it and/or modify it under
11 : the terms of the GNU General Public License as published by the Free
12 : Software Foundation; either version 3, or (at your option) any later
13 : version.
14 :
15 : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
16 : WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 : FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 : for more details.
19 :
20 : You should have received a copy of the GNU General Public License
21 : along with GCC; see the file COPYING3. If not see
22 : <http://www.gnu.org/licenses/>. */
23 :
24 : #include "config.h"
25 : #include "system.h"
26 : #include "coretypes.h"
27 : #include "backend.h"
28 : #include "target.h"
29 : #include "rtl.h"
30 : #include "tree.h"
31 : #include "df.h"
32 : #include "memmodel.h"
33 : #include "tm_p.h"
34 : #include "regs.h"
35 : #include "emit-rtl.h" /* FIXME: Can go away once crtl is moved to rtl.h. */
36 : #include "dumpfile.h"
37 : #include "calls.h"
38 : #include "function-abi.h"
39 :
40 : /* The set of hard registers in eliminables[i].from. */
41 :
42 : static HARD_REG_SET elim_reg_set;
43 :
44 : /* Initialize ur_in and ur_out as if all hard registers were partially
45 : available. */
46 :
47 1202357763 : class df_collection_rec
48 : {
49 : public:
50 : auto_vec<df_ref, 128> def_vec;
51 : auto_vec<df_ref, 32> use_vec;
52 : auto_vec<df_ref, 32> eq_use_vec;
53 : auto_vec<df_mw_hardreg *, 32> mw_vec;
54 : };
55 :
56 : static void df_ref_record (enum df_ref_class, class df_collection_rec *,
57 : rtx, rtx *,
58 : basic_block, struct df_insn_info *,
59 : enum df_ref_type, int ref_flags);
60 : static void df_def_record_1 (class df_collection_rec *, rtx *,
61 : basic_block, struct df_insn_info *,
62 : int ref_flags);
63 : static void df_defs_record (class df_collection_rec *, rtx,
64 : basic_block, struct df_insn_info *,
65 : int ref_flags);
66 : static void df_uses_record (class df_collection_rec *,
67 : rtx *, enum df_ref_type,
68 : basic_block, struct df_insn_info *,
69 : int ref_flags);
70 :
71 : static void df_install_ref_incremental (df_ref);
72 : static void df_insn_refs_collect (class df_collection_rec*,
73 : basic_block, struct df_insn_info *);
74 : static void df_canonize_collection_rec (class df_collection_rec *);
75 :
76 : static void df_get_regular_block_artificial_uses (bitmap);
77 : static void df_get_eh_block_artificial_uses (bitmap);
78 :
79 : static void df_record_entry_block_defs (bitmap);
80 : static void df_record_exit_block_uses (bitmap);
81 : static void df_get_entry_block_def_set (bitmap);
82 : static void df_grow_ref_info (struct df_ref_info *, unsigned int);
83 : static void df_ref_chain_delete_du_chain (df_ref);
84 : static void df_ref_chain_delete (df_ref);
85 :
86 : static void df_refs_add_to_chains (class df_collection_rec *,
87 : basic_block, rtx_insn *, unsigned int);
88 :
89 : static bool df_insn_refs_verify (class df_collection_rec *, basic_block,
90 : rtx_insn *, bool);
91 : static void df_entry_block_defs_collect (class df_collection_rec *, bitmap);
92 : static void df_exit_block_uses_collect (class df_collection_rec *, bitmap);
93 : static void df_install_ref (df_ref, struct df_reg_info *,
94 : struct df_ref_info *, bool);
95 :
96 : static int df_ref_compare (df_ref, df_ref);
97 : static int df_ref_ptr_compare (const void *, const void *);
98 : static int df_mw_compare (const df_mw_hardreg *, const df_mw_hardreg *);
99 : static int df_mw_ptr_compare (const void *, const void *);
100 :
101 : static void df_insn_info_delete (unsigned int);
102 :
103 : /* Indexed by hardware reg number, is true if that register is ever
104 : used in the current function.
105 :
106 : In df-scan.cc, this is set up to record the hard regs used
107 : explicitly. Reload adds in the hard regs used for holding pseudo
108 : regs. Final uses it to generate the code in the function prologue
109 : and epilogue to save and restore registers as needed. */
110 :
111 : static bool regs_ever_live[FIRST_PSEUDO_REGISTER];
112 :
113 : /* Flags used to tell df_refs_add_to_chains() which vectors it should copy. */
114 : static const unsigned int copy_defs = 0x1;
115 : static const unsigned int copy_uses = 0x2;
116 : static const unsigned int copy_eq_uses = 0x4;
117 : static const unsigned int copy_mw = 0x8;
118 : static const unsigned int copy_all = copy_defs | copy_uses | copy_eq_uses
119 : | copy_mw;
120 :
121 : /*----------------------------------------------------------------------------
122 : SCANNING DATAFLOW PROBLEM
123 :
124 : There are several ways in which scanning looks just like the other
125 : dataflow problems. It shares the all the mechanisms for local info
126 : as well as basic block info. Where it differs is when and how often
127 : it gets run. It also has no need for the iterative solver.
128 : ----------------------------------------------------------------------------*/
129 :
130 : /* Problem data for the scanning dataflow function. */
131 : struct df_scan_problem_data
132 : {
133 : object_allocator<df_base_ref> *ref_base_pool;
134 : object_allocator<df_artificial_ref> *ref_artificial_pool;
135 : object_allocator<df_regular_ref> *ref_regular_pool;
136 : object_allocator<df_insn_info> *insn_pool;
137 : object_allocator<df_reg_info> *reg_pool;
138 : object_allocator<df_mw_hardreg> *mw_reg_pool;
139 :
140 : bitmap_obstack reg_bitmaps;
141 : bitmap_obstack insn_bitmaps;
142 : };
143 :
144 : /* Internal function to shut down the scanning problem. */
145 : static void
146 3041716 : df_scan_free_internal (void)
147 : {
148 3041716 : struct df_scan_problem_data *problem_data
149 3041716 : = (struct df_scan_problem_data *) df_scan->problem_data;
150 :
151 3041716 : free (df->def_info.refs);
152 3041716 : free (df->def_info.begin);
153 3041716 : free (df->def_info.count);
154 3041716 : memset (&df->def_info, 0, (sizeof (struct df_ref_info)));
155 :
156 3041716 : free (df->use_info.refs);
157 3041716 : free (df->use_info.begin);
158 3041716 : free (df->use_info.count);
159 3041716 : memset (&df->use_info, 0, (sizeof (struct df_ref_info)));
160 :
161 3041716 : free (df->def_regs);
162 3041716 : df->def_regs = NULL;
163 3041716 : free (df->use_regs);
164 3041716 : df->use_regs = NULL;
165 3041716 : free (df->eq_use_regs);
166 3041716 : df->eq_use_regs = NULL;
167 3041716 : df->regs_size = 0;
168 3041716 : DF_REG_SIZE (df) = 0;
169 :
170 3041716 : free (df->insns);
171 3041716 : df->insns = NULL;
172 3041716 : DF_INSN_SIZE () = 0;
173 :
174 3041716 : free (df_scan->block_info);
175 3041716 : df_scan->block_info = NULL;
176 3041716 : df_scan->block_info_size = 0;
177 :
178 3041716 : bitmap_clear (&df->hardware_regs_used);
179 3041716 : bitmap_clear (&df->regular_block_artificial_uses);
180 3041716 : bitmap_clear (&df->eh_block_artificial_uses);
181 3041716 : BITMAP_FREE (df->entry_block_defs);
182 3041716 : BITMAP_FREE (df->exit_block_uses);
183 3041716 : bitmap_clear (&df->insns_to_delete);
184 3041716 : bitmap_clear (&df->insns_to_rescan);
185 3041716 : bitmap_clear (&df->insns_to_notes_rescan);
186 :
187 6083432 : delete problem_data->ref_base_pool;
188 6083432 : delete problem_data->ref_artificial_pool;
189 6083432 : delete problem_data->ref_regular_pool;
190 6083432 : delete problem_data->insn_pool;
191 6083432 : delete problem_data->reg_pool;
192 6083432 : delete problem_data->mw_reg_pool;
193 3041716 : bitmap_obstack_release (&problem_data->reg_bitmaps);
194 3041716 : bitmap_obstack_release (&problem_data->insn_bitmaps);
195 3041716 : free (df_scan->problem_data);
196 3041716 : }
197 :
198 :
199 : /* Free basic block info. */
200 :
201 : static void
202 6765419 : df_scan_free_bb_info (basic_block bb, void *vbb_info)
203 : {
204 6765419 : struct df_scan_bb_info *bb_info = (struct df_scan_bb_info *) vbb_info;
205 6765419 : unsigned int bb_index = bb->index;
206 6765419 : rtx_insn *insn;
207 :
208 6765419 : FOR_BB_INSNS (bb, insn)
209 0 : if (INSN_P (insn))
210 0 : df_insn_info_delete (INSN_UID (insn));
211 :
212 6765419 : if (bb_index < df_scan->block_info_size)
213 6765419 : bb_info = df_scan_get_bb_info (bb_index);
214 :
215 : /* Get rid of any artificial uses or defs. */
216 6765419 : df_ref_chain_delete_du_chain (bb_info->artificial_defs);
217 6765419 : df_ref_chain_delete_du_chain (bb_info->artificial_uses);
218 13530838 : df_ref_chain_delete (bb_info->artificial_defs);
219 13530838 : df_ref_chain_delete (bb_info->artificial_uses);
220 6765419 : bb_info->artificial_defs = NULL;
221 6765419 : bb_info->artificial_uses = NULL;
222 6765419 : }
223 :
224 :
225 : /* Allocate the problem data for the scanning problem. This should be
226 : called when the problem is created or when the entire function is to
227 : be rescanned. */
228 : void
229 3041716 : df_scan_alloc (bitmap all_blocks ATTRIBUTE_UNUSED)
230 : {
231 3041716 : struct df_scan_problem_data *problem_data;
232 3041716 : basic_block bb;
233 :
234 : /* Given the number of pools, this is really faster than tearing
235 : everything apart. */
236 3041716 : if (df_scan->problem_data)
237 1570351 : df_scan_free_internal ();
238 :
239 3041716 : problem_data = XNEW (struct df_scan_problem_data);
240 3041716 : df_scan->problem_data = problem_data;
241 3041716 : df_scan->computed = true;
242 :
243 6083432 : problem_data->ref_base_pool = new object_allocator<df_base_ref>
244 3041716 : ("df_scan ref base");
245 6083432 : problem_data->ref_artificial_pool = new object_allocator<df_artificial_ref>
246 3041716 : ("df_scan ref artificial");
247 6083432 : problem_data->ref_regular_pool = new object_allocator<df_regular_ref>
248 3041716 : ("df_scan ref regular");
249 6083432 : problem_data->insn_pool = new object_allocator<df_insn_info>
250 3041716 : ("df_scan insn");
251 6083432 : problem_data->reg_pool = new object_allocator<df_reg_info>
252 3041716 : ("df_scan reg");
253 6083432 : problem_data->mw_reg_pool = new object_allocator<df_mw_hardreg>
254 3041716 : ("df_scan mw_reg");
255 :
256 3041716 : bitmap_obstack_initialize (&problem_data->reg_bitmaps);
257 3041716 : bitmap_obstack_initialize (&problem_data->insn_bitmaps);
258 :
259 3041716 : df_grow_reg_info ();
260 :
261 3041716 : df_grow_insn_info ();
262 3041716 : df_grow_bb_info (df_scan);
263 :
264 39756197 : FOR_ALL_BB_FN (bb, cfun)
265 : {
266 36714481 : unsigned int bb_index = bb->index;
267 36714481 : struct df_scan_bb_info *bb_info = df_scan_get_bb_info (bb_index);
268 36714481 : bb_info->artificial_defs = NULL;
269 36714481 : bb_info->artificial_uses = NULL;
270 : }
271 :
272 3041716 : bitmap_initialize (&df->hardware_regs_used, &problem_data->reg_bitmaps);
273 3041716 : bitmap_initialize (&df->regular_block_artificial_uses, &problem_data->reg_bitmaps);
274 3041716 : bitmap_initialize (&df->eh_block_artificial_uses, &problem_data->reg_bitmaps);
275 3041716 : df->entry_block_defs = BITMAP_ALLOC (&problem_data->reg_bitmaps);
276 3041716 : df->exit_block_uses = BITMAP_ALLOC (&problem_data->reg_bitmaps);
277 3041716 : bitmap_initialize (&df->insns_to_delete, &problem_data->insn_bitmaps);
278 3041716 : bitmap_initialize (&df->insns_to_rescan, &problem_data->insn_bitmaps);
279 3041716 : bitmap_initialize (&df->insns_to_notes_rescan, &problem_data->insn_bitmaps);
280 3041716 : df_scan->optional_p = false;
281 3041716 : }
282 :
283 :
284 : /* Free all of the data associated with the scan problem. */
285 :
286 : static void
287 1471365 : df_scan_free (void)
288 : {
289 1471365 : if (df_scan->problem_data)
290 1471365 : df_scan_free_internal ();
291 :
292 1471365 : if (df->blocks_to_analyze)
293 : {
294 0 : BITMAP_FREE (df->blocks_to_analyze);
295 0 : df->blocks_to_analyze = NULL;
296 : }
297 :
298 1471365 : free (df_scan);
299 1471365 : }
300 :
301 : /* Dump the preamble for DF_SCAN dump. */
302 : static void
303 3940 : df_scan_start_dump (FILE *file ATTRIBUTE_UNUSED)
304 : {
305 3940 : int i;
306 3940 : int dcount = 0;
307 3940 : int ucount = 0;
308 3940 : int ecount = 0;
309 3940 : int icount = 0;
310 3940 : int ccount = 0;
311 3940 : basic_block bb;
312 3940 : rtx_insn *insn;
313 :
314 3940 : fprintf (file, ";; fully invalidated by EH \t");
315 3940 : df_print_regset
316 3940 : (file, bitmap_view<HARD_REG_SET> (eh_edge_abi.full_reg_clobbers ()));
317 3940 : fprintf (file, ";; hardware regs used \t");
318 3940 : df_print_regset (file, &df->hardware_regs_used);
319 3940 : fprintf (file, ";; regular block artificial uses \t");
320 3940 : df_print_regset (file, &df->regular_block_artificial_uses);
321 3940 : fprintf (file, ";; eh block artificial uses \t");
322 3940 : df_print_regset (file, &df->eh_block_artificial_uses);
323 3940 : fprintf (file, ";; entry block defs \t");
324 3940 : df_print_regset (file, df->entry_block_defs);
325 3940 : fprintf (file, ";; exit block uses \t");
326 3940 : df_print_regset (file, df->exit_block_uses);
327 3940 : fprintf (file, ";; regs ever live \t");
328 370360 : for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
329 362480 : if (df_regs_ever_live_p (i))
330 20159 : fprintf (file, " %d [%s]", i, reg_names[i]);
331 3940 : fprintf (file, "\n;; ref usage \t");
332 :
333 483601 : for (i = 0; i < (int)df->regs_inited; i++)
334 479661 : if (DF_REG_DEF_COUNT (i) || DF_REG_USE_COUNT (i) || DF_REG_EQ_USE_COUNT (i))
335 : {
336 211217 : const char * sep = "";
337 :
338 211217 : fprintf (file, "r%d={", i);
339 211217 : if (DF_REG_DEF_COUNT (i))
340 : {
341 211205 : fprintf (file, "%dd", DF_REG_DEF_COUNT (i));
342 211205 : sep = ",";
343 211205 : dcount += DF_REG_DEF_COUNT (i);
344 : }
345 211217 : if (DF_REG_USE_COUNT (i))
346 : {
347 51545 : fprintf (file, "%s%du", sep, DF_REG_USE_COUNT (i));
348 51545 : sep = ",";
349 51545 : ucount += DF_REG_USE_COUNT (i);
350 : }
351 211217 : if (DF_REG_EQ_USE_COUNT (i))
352 : {
353 2196 : fprintf (file, "%s%de", sep, DF_REG_EQ_USE_COUNT (i));
354 2196 : ecount += DF_REG_EQ_USE_COUNT (i);
355 : }
356 211217 : fprintf (file, "} ");
357 : }
358 :
359 29423 : FOR_EACH_BB_FN (bb, cfun)
360 194897 : FOR_BB_INSNS (bb, insn)
361 169414 : if (INSN_P (insn))
362 : {
363 116943 : if (CALL_P (insn))
364 6283 : ccount++;
365 : else
366 110660 : icount++;
367 : }
368 :
369 3940 : fprintf (file, "\n;; total ref usage %d{%dd,%du,%de}"
370 : " in %d{%d regular + %d call} insns.\n",
371 3940 : dcount + ucount + ecount, dcount, ucount, ecount,
372 : icount + ccount, icount, ccount);
373 3940 : }
374 :
375 : /* Dump the bb_info for a given basic block. */
376 : static void
377 5480 : df_scan_start_block (basic_block bb, FILE *file)
378 : {
379 5480 : struct df_scan_bb_info *bb_info
380 5480 : = df_scan_get_bb_info (bb->index);
381 :
382 5480 : if (bb_info)
383 : {
384 5480 : fprintf (file, ";; bb %d artificial_defs: ", bb->index);
385 5480 : df_refs_chain_dump (bb_info->artificial_defs, true, file);
386 5480 : fprintf (file, "\n;; bb %d artificial_uses: ", bb->index);
387 5480 : df_refs_chain_dump (bb_info->artificial_uses, true, file);
388 5480 : fprintf (file, "\n");
389 : }
390 : #if 0
391 : {
392 : rtx_insn *insn;
393 : FOR_BB_INSNS (bb, insn)
394 : if (INSN_P (insn))
395 : df_insn_debug (insn, false, file);
396 : }
397 : #endif
398 5480 : }
399 :
400 : static const struct df_problem problem_SCAN =
401 : {
402 : DF_SCAN, /* Problem id. */
403 : DF_NONE, /* Direction. */
404 : df_scan_alloc, /* Allocate the problem specific data. */
405 : NULL, /* Reset global information. */
406 : df_scan_free_bb_info, /* Free basic block info. */
407 : NULL, /* Local compute function. */
408 : NULL, /* Init the solution specific data. */
409 : NULL, /* Iterative solver. */
410 : NULL, /* Confluence operator 0. */
411 : NULL, /* Confluence operator n. */
412 : NULL, /* Transfer function. */
413 : NULL, /* Finalize function. */
414 : df_scan_free, /* Free all of the problem information. */
415 : NULL, /* Remove this problem from the stack of dataflow problems. */
416 : df_scan_start_dump, /* Debugging. */
417 : df_scan_start_block, /* Debugging start block. */
418 : NULL, /* Debugging end block. */
419 : NULL, /* Debugging start insn. */
420 : NULL, /* Debugging end insn. */
421 : NULL, /* Incremental solution verify start. */
422 : NULL, /* Incremental solution verify end. */
423 : NULL, /* Dependent problem. */
424 : sizeof (struct df_scan_bb_info),/* Size of entry of block_info array. */
425 : TV_DF_SCAN, /* Timing variable. */
426 : false /* Reset blocks on dropping out of blocks_to_analyze. */
427 : };
428 :
429 :
430 : /* Create a new DATAFLOW instance and add it to an existing instance
431 : of DF. The returned structure is what is used to get at the
432 : solution. */
433 :
434 : void
435 1471365 : df_scan_add_problem (void)
436 : {
437 1471365 : df_add_problem (&problem_SCAN);
438 1471365 : }
439 :
440 :
441 : /*----------------------------------------------------------------------------
442 : Storage Allocation Utilities
443 : ----------------------------------------------------------------------------*/
444 :
445 :
446 : /* First, grow the reg_info information. If the current size is less than
447 : the number of pseudos, grow to 25% more than the number of
448 : pseudos.
449 :
450 : Second, assure that all of the slots up to max_reg_num have been
451 : filled with reg_info structures. */
452 :
453 : void
454 1192584446 : df_grow_reg_info (void)
455 : {
456 1192584446 : unsigned int max_reg = max_reg_num ();
457 1192584446 : unsigned int new_size = max_reg;
458 1192584446 : struct df_scan_problem_data *problem_data
459 1192584446 : = (struct df_scan_problem_data *) df_scan->problem_data;
460 1192584446 : unsigned int i;
461 :
462 1192584446 : if (df->regs_size < new_size)
463 : {
464 3087625 : new_size += new_size / 4;
465 3087625 : df->def_regs = XRESIZEVEC (struct df_reg_info *, df->def_regs, new_size);
466 3087625 : df->use_regs = XRESIZEVEC (struct df_reg_info *, df->use_regs, new_size);
467 3087625 : df->eq_use_regs = XRESIZEVEC (struct df_reg_info *, df->eq_use_regs,
468 : new_size);
469 3087625 : df->def_info.begin = XRESIZEVEC (unsigned, df->def_info.begin, new_size);
470 3087625 : df->def_info.count = XRESIZEVEC (unsigned, df->def_info.count, new_size);
471 3087625 : df->use_info.begin = XRESIZEVEC (unsigned, df->use_info.begin, new_size);
472 3087625 : df->use_info.count = XRESIZEVEC (unsigned, df->use_info.count, new_size);
473 3087625 : df->regs_size = new_size;
474 : }
475 :
476 1631243889 : for (i = df->regs_inited; i < max_reg; i++)
477 : {
478 438659443 : struct df_reg_info *reg_info;
479 :
480 : // TODO
481 438659443 : reg_info = problem_data->reg_pool->allocate ();
482 438659443 : memset (reg_info, 0, sizeof (struct df_reg_info));
483 438659443 : df->def_regs[i] = reg_info;
484 438659443 : reg_info = problem_data->reg_pool->allocate ();
485 438659443 : memset (reg_info, 0, sizeof (struct df_reg_info));
486 438659443 : df->use_regs[i] = reg_info;
487 438659443 : reg_info = problem_data->reg_pool->allocate ();
488 438659443 : memset (reg_info, 0, sizeof (struct df_reg_info));
489 438659443 : df->eq_use_regs[i] = reg_info;
490 438659443 : df->def_info.begin[i] = 0;
491 438659443 : df->def_info.count[i] = 0;
492 438659443 : df->use_info.begin[i] = 0;
493 438659443 : df->use_info.count[i] = 0;
494 : }
495 :
496 1192584446 : df->regs_inited = max_reg;
497 1192584446 : }
498 :
499 :
500 : /* Grow the ref information. */
501 :
502 : static void
503 6010661 : df_grow_ref_info (struct df_ref_info *ref_info, unsigned int new_size)
504 : {
505 6010661 : if (ref_info->refs_size < new_size)
506 : {
507 6010661 : ref_info->refs = XRESIZEVEC (df_ref, ref_info->refs, new_size);
508 6010661 : memset (ref_info->refs + ref_info->refs_size, 0,
509 6010661 : (new_size - ref_info->refs_size) *sizeof (df_ref));
510 6010661 : ref_info->refs_size = new_size;
511 : }
512 6010661 : }
513 :
514 :
515 : /* Check and grow the ref information if necessary. This routine
516 : guarantees total_size + BITMAP_ADDEND amount of entries in refs
517 : array. It updates ref_info->refs_size only and does not change
518 : ref_info->total_size. */
519 :
520 : static void
521 7104332 : df_check_and_grow_ref_info (struct df_ref_info *ref_info,
522 : unsigned bitmap_addend)
523 : {
524 7104332 : if (ref_info->refs_size < ref_info->total_size + bitmap_addend)
525 : {
526 6010661 : int new_size = ref_info->total_size + bitmap_addend;
527 6010661 : new_size += ref_info->total_size / 4;
528 6010661 : df_grow_ref_info (ref_info, new_size);
529 : }
530 7104332 : }
531 :
532 :
533 : /* Grow the ref information. If the current size is less than the
534 : number of instructions, grow to 25% more than the number of
535 : instructions. */
536 :
537 : void
538 447521823 : df_grow_insn_info (void)
539 : {
540 447521823 : unsigned int new_size = get_max_uid () + 1;
541 447521823 : if (DF_INSN_SIZE () < new_size)
542 : {
543 4313651 : new_size += new_size / 4;
544 4313651 : df->insns = XRESIZEVEC (struct df_insn_info *, df->insns, new_size);
545 4313651 : memset (df->insns + df->insns_size, 0,
546 4313651 : (new_size - DF_INSN_SIZE ()) *sizeof (struct df_insn_info *));
547 4313651 : DF_INSN_SIZE () = new_size;
548 : }
549 447521823 : }
550 :
551 :
552 :
553 :
554 : /*----------------------------------------------------------------------------
555 : PUBLIC INTERFACES FOR SMALL GRAIN CHANGES TO SCANNING.
556 : ----------------------------------------------------------------------------*/
557 :
558 : /* Rescan all of the block_to_analyze or all of the blocks in the
559 : function if df_set_blocks if blocks_to_analyze is NULL; */
560 :
561 : void
562 3041716 : df_scan_blocks (void)
563 : {
564 3041716 : basic_block bb;
565 :
566 3041716 : df->def_info.ref_order = DF_REF_ORDER_NO_TABLE;
567 3041716 : df->use_info.ref_order = DF_REF_ORDER_NO_TABLE;
568 :
569 3041716 : df_get_regular_block_artificial_uses (&df->regular_block_artificial_uses);
570 3041716 : df_get_eh_block_artificial_uses (&df->eh_block_artificial_uses);
571 :
572 3041716 : bitmap_ior_into (&df->eh_block_artificial_uses,
573 3041716 : &df->regular_block_artificial_uses);
574 :
575 : /* ENTRY and EXIT blocks have special defs/uses. */
576 3041716 : df_get_entry_block_def_set (df->entry_block_defs);
577 3041716 : df_record_entry_block_defs (df->entry_block_defs);
578 3041716 : df_get_exit_block_use_set (df->exit_block_uses);
579 3041716 : df_record_exit_block_uses (df->exit_block_uses);
580 3041716 : df_set_bb_dirty (BASIC_BLOCK_FOR_FN (cfun, ENTRY_BLOCK));
581 3041716 : df_set_bb_dirty (BASIC_BLOCK_FOR_FN (cfun, EXIT_BLOCK));
582 :
583 : /* Regular blocks */
584 33672765 : FOR_EACH_BB_FN (bb, cfun)
585 : {
586 30631049 : unsigned int bb_index = bb->index;
587 30631049 : df_bb_refs_record (bb_index, true);
588 : }
589 3041716 : }
590 :
591 : /* Create new refs under address LOC within INSN. This function is
592 : only used externally. REF_FLAGS must be either 0 or DF_REF_IN_NOTE,
593 : depending on whether LOC is inside PATTERN (INSN) or a note. */
594 :
595 : void
596 0 : df_uses_create (rtx *loc, rtx_insn *insn, int ref_flags)
597 : {
598 0 : gcc_assert (!(ref_flags & ~DF_REF_IN_NOTE));
599 0 : df_uses_record (NULL, loc, DF_REF_REG_USE,
600 0 : BLOCK_FOR_INSN (insn),
601 0 : DF_INSN_INFO_GET (insn),
602 : ref_flags);
603 0 : }
604 :
605 : static void
606 0 : df_install_ref_incremental (df_ref ref)
607 : {
608 0 : struct df_reg_info **reg_info;
609 0 : struct df_ref_info *ref_info;
610 0 : df_ref *ref_ptr;
611 0 : bool add_to_table;
612 :
613 0 : rtx_insn *insn = DF_REF_INSN (ref);
614 0 : basic_block bb = BLOCK_FOR_INSN (insn);
615 :
616 0 : if (DF_REF_REG_DEF_P (ref))
617 : {
618 0 : reg_info = df->def_regs;
619 0 : ref_info = &df->def_info;
620 0 : ref_ptr = &DF_INSN_DEFS (insn);
621 0 : add_to_table = ref_info->ref_order != DF_REF_ORDER_NO_TABLE;
622 : }
623 0 : else if (DF_REF_FLAGS (ref) & DF_REF_IN_NOTE)
624 : {
625 0 : reg_info = df->eq_use_regs;
626 0 : ref_info = &df->use_info;
627 0 : ref_ptr = &DF_INSN_EQ_USES (insn);
628 0 : switch (ref_info->ref_order)
629 : {
630 : case DF_REF_ORDER_UNORDERED_WITH_NOTES:
631 : case DF_REF_ORDER_BY_REG_WITH_NOTES:
632 : case DF_REF_ORDER_BY_INSN_WITH_NOTES:
633 : add_to_table = true;
634 : break;
635 : default:
636 : add_to_table = false;
637 : break;
638 : }
639 : }
640 : else
641 : {
642 0 : reg_info = df->use_regs;
643 0 : ref_info = &df->use_info;
644 0 : ref_ptr = &DF_INSN_USES (insn);
645 0 : add_to_table = ref_info->ref_order != DF_REF_ORDER_NO_TABLE;
646 : }
647 :
648 : /* Do not add if ref is not in the right blocks. */
649 0 : if (add_to_table && df->analyze_subset)
650 0 : add_to_table = bitmap_bit_p (df->blocks_to_analyze, bb->index);
651 :
652 0 : df_install_ref (ref, reg_info[DF_REF_REGNO (ref)], ref_info, add_to_table);
653 :
654 0 : if (add_to_table)
655 0 : switch (ref_info->ref_order)
656 : {
657 0 : case DF_REF_ORDER_UNORDERED_WITH_NOTES:
658 0 : case DF_REF_ORDER_BY_REG_WITH_NOTES:
659 0 : case DF_REF_ORDER_BY_INSN_WITH_NOTES:
660 0 : ref_info->ref_order = DF_REF_ORDER_UNORDERED_WITH_NOTES;
661 0 : break;
662 0 : default:
663 0 : ref_info->ref_order = DF_REF_ORDER_UNORDERED;
664 0 : break;
665 : }
666 :
667 0 : while (*ref_ptr && df_ref_compare (*ref_ptr, ref) < 0)
668 0 : ref_ptr = &DF_REF_NEXT_LOC (*ref_ptr);
669 :
670 0 : DF_REF_NEXT_LOC (ref) = *ref_ptr;
671 0 : *ref_ptr = ref;
672 :
673 : #if 0
674 : if (dump_file)
675 : {
676 : fprintf (dump_file, "adding ref ");
677 : df_ref_debug (ref, dump_file);
678 : }
679 : #endif
680 : /* By adding the ref directly, df_insn_rescan my not find any
681 : differences even though the block will have changed. So we need
682 : to mark the block dirty ourselves. */
683 0 : if (!DEBUG_INSN_P (DF_REF_INSN (ref)))
684 0 : df_set_bb_dirty (bb);
685 0 : }
686 :
687 :
688 :
689 : /*----------------------------------------------------------------------------
690 : UTILITIES TO CREATE AND DESTROY REFS AND CHAINS.
691 : ----------------------------------------------------------------------------*/
692 :
693 : static void
694 7812054904 : df_free_ref (df_ref ref)
695 : {
696 7812054904 : struct df_scan_problem_data *problem_data
697 7812054904 : = (struct df_scan_problem_data *) df_scan->problem_data;
698 :
699 7812054904 : switch (DF_REF_CLASS (ref))
700 : {
701 5874152365 : case DF_REF_BASE:
702 5874152365 : problem_data->ref_base_pool->remove ((df_base_ref *) (ref));
703 5874152365 : break;
704 :
705 366329351 : case DF_REF_ARTIFICIAL:
706 366329351 : problem_data->ref_artificial_pool->remove
707 366329351 : ((df_artificial_ref *) (ref));
708 366329351 : break;
709 :
710 1571573188 : case DF_REF_REGULAR:
711 1571573188 : problem_data->ref_regular_pool->remove
712 1571573188 : ((df_regular_ref *) (ref));
713 1571573188 : break;
714 : }
715 7812054904 : }
716 :
717 :
718 : /* Unlink and delete REF at the reg_use, reg_eq_use or reg_def chain.
719 : Also delete the def-use or use-def chain if it exists. */
720 :
721 : static void
722 305852006 : df_reg_chain_unlink (df_ref ref)
723 : {
724 305852006 : df_ref next = DF_REF_NEXT_REG (ref);
725 305852006 : df_ref prev = DF_REF_PREV_REG (ref);
726 305852006 : int id = DF_REF_ID (ref);
727 305852006 : struct df_reg_info *reg_info;
728 305852006 : df_ref *refs = NULL;
729 :
730 305852006 : if (DF_REF_REG_DEF_P (ref))
731 : {
732 148597072 : int regno = DF_REF_REGNO (ref);
733 148597072 : reg_info = DF_REG_DEF_GET (regno);
734 148597072 : refs = df->def_info.refs;
735 : }
736 : else
737 : {
738 157254934 : if (DF_REF_FLAGS (ref) & DF_REF_IN_NOTE)
739 : {
740 11340281 : reg_info = DF_REG_EQ_USE_GET (DF_REF_REGNO (ref));
741 11340281 : switch (df->use_info.ref_order)
742 : {
743 0 : case DF_REF_ORDER_UNORDERED_WITH_NOTES:
744 0 : case DF_REF_ORDER_BY_REG_WITH_NOTES:
745 0 : case DF_REF_ORDER_BY_INSN_WITH_NOTES:
746 0 : refs = df->use_info.refs;
747 0 : break;
748 : default:
749 : break;
750 : }
751 : }
752 : else
753 : {
754 145914653 : reg_info = DF_REG_USE_GET (DF_REF_REGNO (ref));
755 145914653 : refs = df->use_info.refs;
756 : }
757 : }
758 :
759 294511725 : if (refs)
760 : {
761 971547 : if (df->analyze_subset)
762 : {
763 565275 : if (bitmap_bit_p (df->blocks_to_analyze, DF_REF_BBNO (ref)))
764 313393 : refs[id] = NULL;
765 : }
766 : else
767 406272 : refs[id] = NULL;
768 : }
769 :
770 : /* Delete any def-use or use-def chains that start here. It is
771 : possible that there is trash in this field. This happens for
772 : insns that have been deleted when rescanning has been deferred
773 : and the chain problem has also been deleted. The chain tear down
774 : code skips deleted insns. */
775 305852006 : if (df_chain && DF_REF_CHAIN (ref))
776 0 : df_chain_unlink (ref);
777 :
778 305852006 : reg_info->n_refs--;
779 305852006 : if (DF_REF_FLAGS_IS_SET (ref, DF_HARD_REG_LIVE))
780 : {
781 87946731 : gcc_assert (DF_REF_REGNO (ref) < FIRST_PSEUDO_REGISTER);
782 87946731 : df->hard_regs_live_count[DF_REF_REGNO (ref)]--;
783 : }
784 :
785 : /* Unlink from the reg chain. If there is no prev, this is the
786 : first of the list. If not, just join the next and prev. */
787 305852006 : if (prev)
788 207181401 : DF_REF_NEXT_REG (prev) = next;
789 : else
790 : {
791 98670605 : gcc_assert (reg_info->reg_chain == ref);
792 98670605 : reg_info->reg_chain = next;
793 : }
794 305852006 : if (next)
795 179927519 : DF_REF_PREV_REG (next) = prev;
796 :
797 305852006 : df_free_ref (ref);
798 305852006 : }
799 :
800 : /* Initialize INSN_INFO to describe INSN. */
801 :
802 : static void
803 464724790 : df_insn_info_init_fields (df_insn_info *insn_info, rtx_insn *insn)
804 : {
805 464724790 : memset (insn_info, 0, sizeof (struct df_insn_info));
806 464724790 : insn_info->insn = insn;
807 0 : }
808 :
809 : /* Create the insn record for INSN. If there was one there, zero it
810 : out. */
811 :
812 : struct df_insn_info *
813 405774305 : df_insn_create_insn_record (rtx_insn *insn)
814 : {
815 405774305 : struct df_scan_problem_data *problem_data
816 405774305 : = (struct df_scan_problem_data *) df_scan->problem_data;
817 405774305 : struct df_insn_info *insn_rec;
818 :
819 405774305 : df_grow_insn_info ();
820 405774305 : insn_rec = DF_INSN_INFO_GET (insn);
821 405774305 : if (!insn_rec)
822 : {
823 405774305 : insn_rec = problem_data->insn_pool->allocate ();
824 405774305 : DF_INSN_INFO_SET (insn, insn_rec);
825 : }
826 405774305 : df_insn_info_init_fields (insn_rec, insn);
827 405774305 : return insn_rec;
828 : }
829 :
830 :
831 : /* Delete all du chain (DF_REF_CHAIN()) of all refs in the ref chain. */
832 :
833 : static void
834 20954038 : df_ref_chain_delete_du_chain (df_ref ref)
835 : {
836 80525263 : for (; ref; ref = DF_REF_NEXT_LOC (ref))
837 : /* CHAIN is allocated by DF_CHAIN. So make sure to
838 : pass df_scan instance for the problem. */
839 59571225 : if (DF_REF_CHAIN (ref))
840 483924 : df_chain_unlink (ref);
841 20954038 : }
842 :
843 :
844 : /* Delete all refs in the ref chain. */
845 :
846 : static void
847 487950235 : df_ref_chain_delete (df_ref ref)
848 : {
849 487950235 : df_ref next;
850 787036822 : for (; ref; ref = next)
851 : {
852 305852006 : next = DF_REF_NEXT_LOC (ref);
853 305852006 : df_reg_chain_unlink (ref);
854 : }
855 0 : }
856 :
857 :
858 : /* Delete the hardreg chain. */
859 :
860 : static void
861 150778540 : df_mw_hardreg_chain_delete (struct df_mw_hardreg *hardregs)
862 : {
863 150778540 : struct df_scan_problem_data *problem_data
864 150778540 : = (struct df_scan_problem_data *) df_scan->problem_data;
865 150778540 : df_mw_hardreg *next;
866 :
867 153430646 : for (; hardregs; hardregs = next)
868 : {
869 2652106 : next = DF_MWS_NEXT (hardregs);
870 2652106 : problem_data->mw_reg_pool->remove (hardregs);
871 : }
872 150778540 : }
873 :
874 : /* Remove the contents of INSN_INFO (but don't free INSN_INFO itself). */
875 :
876 : static void
877 150640288 : df_insn_info_free_fields (df_insn_info *insn_info)
878 : {
879 : /* In general, notes do not have the insn_info fields
880 : initialized. However, combine deletes insns by changing them
881 : to notes. How clever. So we cannot just check if it is a
882 : valid insn before short circuiting this code, we need to see
883 : if we actually initialized it. */
884 150640288 : df_mw_hardreg_chain_delete (insn_info->mw_hardregs);
885 :
886 150640288 : if (df_chain)
887 : {
888 618207 : df_ref_chain_delete_du_chain (insn_info->defs);
889 618207 : df_ref_chain_delete_du_chain (insn_info->uses);
890 618207 : df_ref_chain_delete_du_chain (insn_info->eq_uses);
891 : }
892 :
893 150640288 : df_ref_chain_delete (insn_info->defs);
894 150640288 : df_ref_chain_delete (insn_info->uses);
895 150640288 : df_ref_chain_delete (insn_info->eq_uses);
896 150640288 : }
897 :
898 : /* Delete all of the refs information from the insn with UID.
899 : Internal helper for df_insn_delete, df_insn_rescan, and other
900 : df-scan routines that don't have to work in deferred mode
901 : and do not have to mark basic blocks for re-processing. */
902 :
903 : static void
904 101465508 : df_insn_info_delete (unsigned int uid)
905 : {
906 101465508 : struct df_insn_info *insn_info = DF_INSN_UID_SAFE_GET (uid);
907 :
908 101465508 : bitmap_clear_bit (&df->insns_to_delete, uid);
909 101465508 : bitmap_clear_bit (&df->insns_to_rescan, uid);
910 101465508 : bitmap_clear_bit (&df->insns_to_notes_rescan, uid);
911 101465508 : if (insn_info)
912 : {
913 91689803 : struct df_scan_problem_data *problem_data
914 91689803 : = (struct df_scan_problem_data *) df_scan->problem_data;
915 :
916 91689803 : df_insn_info_free_fields (insn_info);
917 91689803 : problem_data->insn_pool->remove (insn_info);
918 91689803 : DF_INSN_UID_SET (uid, NULL);
919 : }
920 101465508 : }
921 :
922 : /* Delete all of the refs information from INSN, either right now
923 : or marked for later in deferred mode. */
924 :
925 : void
926 107957362 : df_insn_delete (rtx_insn *insn)
927 : {
928 107957362 : unsigned int uid;
929 107957362 : basic_block bb;
930 :
931 107957362 : gcc_checking_assert (INSN_P (insn));
932 :
933 107957362 : if (!df)
934 : return;
935 :
936 101468337 : uid = INSN_UID (insn);
937 101468337 : bb = BLOCK_FOR_INSN (insn);
938 :
939 : /* ??? bb can be NULL after pass_free_cfg. At that point, DF should
940 : not exist anymore (as mentioned in df-core.cc: "The only requirement
941 : [for DF] is that there be a correct control flow graph." Clearly
942 : that isn't the case after pass_free_cfg. But DF is freed much later
943 : because some back-ends want to use DF info even though the CFG is
944 : already gone. It's not clear to me whether that is safe, actually.
945 : In any case, we expect BB to be non-NULL at least up to register
946 : allocation, so disallow a non-NULL BB up to there. Not perfect
947 : but better than nothing... */
948 101468337 : gcc_checking_assert (bb != NULL || reload_completed);
949 :
950 101468337 : df_grow_bb_info (df_scan);
951 101468337 : df_grow_reg_info ();
952 :
953 : /* The block must be marked as dirty now, rather than later as in
954 : df_insn_rescan and df_notes_rescan because it may not be there at
955 : rescanning time and the mark would blow up.
956 : DEBUG_INSNs do not make a block's data flow solution dirty (at
957 : worst the LUIDs are no longer contiguous). */
958 101468337 : if (bb != NULL && NONDEBUG_INSN_P (insn))
959 51521218 : df_set_bb_dirty (bb);
960 :
961 : /* The client has deferred rescanning. */
962 101468337 : if (df->changeable_flags & DF_DEFER_INSN_RESCAN)
963 : {
964 5141381 : struct df_insn_info *insn_info = DF_INSN_UID_SAFE_GET (uid);
965 5141381 : if (insn_info)
966 : {
967 5141381 : bitmap_clear_bit (&df->insns_to_rescan, uid);
968 5141381 : bitmap_clear_bit (&df->insns_to_notes_rescan, uid);
969 5141381 : bitmap_set_bit (&df->insns_to_delete, uid);
970 : }
971 5141381 : if (dump_file)
972 672 : fprintf (dump_file, "deferring deletion of insn with uid = %d.\n", uid);
973 5141381 : return;
974 : }
975 :
976 96326956 : if (dump_file)
977 1053 : fprintf (dump_file, "deleting insn with uid = %d.\n", uid);
978 :
979 96326956 : df_insn_info_delete (uid);
980 : }
981 :
982 :
983 : /* Free all of the refs and the mw_hardregs in COLLECTION_REC. */
984 :
985 : static void
986 1108521286 : df_free_collection_rec (class df_collection_rec *collection_rec)
987 : {
988 1108521286 : unsigned int ix;
989 1108521286 : struct df_scan_problem_data *problem_data
990 1108521286 : = (struct df_scan_problem_data *) df_scan->problem_data;
991 1108521286 : df_ref ref;
992 1108521286 : struct df_mw_hardreg *mw;
993 :
994 7480564734 : FOR_EACH_VEC_ELT (collection_rec->def_vec, ix, ref)
995 6372043448 : df_free_ref (ref);
996 2220592921 : FOR_EACH_VEC_ELT (collection_rec->use_vec, ix, ref)
997 1112071635 : df_free_ref (ref);
998 1130227165 : FOR_EACH_VEC_ELT (collection_rec->eq_use_vec, ix, ref)
999 21705879 : df_free_ref (ref);
1000 1114244815 : FOR_EACH_VEC_ELT (collection_rec->mw_vec, ix, mw)
1001 5723529 : problem_data->mw_reg_pool->remove (mw);
1002 :
1003 1108521286 : collection_rec->def_vec.release ();
1004 1108521286 : collection_rec->use_vec.release ();
1005 1108521286 : collection_rec->eq_use_vec.release ();
1006 1108521286 : collection_rec->mw_vec.release ();
1007 1108521286 : }
1008 :
1009 : /* Rescan INSN. Return TRUE if the rescanning produced any changes. */
1010 :
1011 : bool
1012 1053273390 : df_insn_rescan (rtx_insn *insn)
1013 : {
1014 1053273390 : unsigned int uid = INSN_UID (insn);
1015 1053273390 : struct df_insn_info *insn_info = NULL;
1016 1053273390 : basic_block bb = BLOCK_FOR_INSN (insn);
1017 1053273390 : class df_collection_rec collection_rec;
1018 :
1019 1053273390 : if ((!df) || (!INSN_P (insn)))
1020 : return false;
1021 :
1022 1022952518 : if (!bb)
1023 : {
1024 64 : if (dump_file)
1025 0 : fprintf (dump_file, "no bb for insn with uid = %d.\n", uid);
1026 64 : return false;
1027 : }
1028 :
1029 : /* The client has disabled rescanning and plans to do it itself. */
1030 1022952454 : if (df->changeable_flags & DF_NO_INSN_RESCAN)
1031 : return false;
1032 :
1033 1009237461 : df_grow_bb_info (df_scan);
1034 1009237461 : df_grow_reg_info ();
1035 :
1036 1009237461 : insn_info = DF_INSN_UID_SAFE_GET (uid);
1037 :
1038 : /* The client has deferred rescanning. */
1039 1009237461 : if (df->changeable_flags & DF_DEFER_INSN_RESCAN)
1040 : {
1041 574242963 : if (!insn_info)
1042 : {
1043 3255764 : insn_info = df_insn_create_insn_record (insn);
1044 3255764 : insn_info->defs = 0;
1045 3255764 : insn_info->uses = 0;
1046 3255764 : insn_info->eq_uses = 0;
1047 3255764 : insn_info->mw_hardregs = 0;
1048 : }
1049 574242963 : if (dump_file)
1050 10285 : fprintf (dump_file, "deferring rescan insn with uid = %d.\n", uid);
1051 :
1052 574242963 : bitmap_clear_bit (&df->insns_to_delete, uid);
1053 574242963 : bitmap_clear_bit (&df->insns_to_notes_rescan, uid);
1054 574242963 : bitmap_set_bit (&df->insns_to_rescan, INSN_UID (insn));
1055 574242963 : return false;
1056 : }
1057 :
1058 434994498 : bitmap_clear_bit (&df->insns_to_delete, uid);
1059 434994498 : bitmap_clear_bit (&df->insns_to_rescan, uid);
1060 434994498 : bitmap_clear_bit (&df->insns_to_notes_rescan, uid);
1061 434994498 : if (insn_info)
1062 : {
1063 397588904 : int luid;
1064 397588904 : bool the_same = df_insn_refs_verify (&collection_rec, bb, insn, false);
1065 : /* If there's no change, return false. */
1066 397588904 : if (the_same)
1067 : {
1068 338638419 : df_free_collection_rec (&collection_rec);
1069 338638419 : if (dump_file)
1070 9383 : fprintf (dump_file, "verify found no changes in insn with uid = %d.\n", uid);
1071 338638419 : return false;
1072 : }
1073 58950485 : if (dump_file)
1074 5048 : fprintf (dump_file, "rescanning insn with uid = %d.\n", uid);
1075 :
1076 : /* There's change - we need to delete the existing info.
1077 : Since the insn isn't moved, we can salvage its LUID. */
1078 58950485 : luid = DF_INSN_LUID (insn);
1079 58950485 : df_insn_info_free_fields (insn_info);
1080 58950485 : df_insn_info_init_fields (insn_info, insn);
1081 58950485 : DF_INSN_LUID (insn) = luid;
1082 : }
1083 : else
1084 : {
1085 37405594 : struct df_insn_info *insn_info = df_insn_create_insn_record (insn);
1086 37405594 : df_insn_refs_collect (&collection_rec, bb, insn_info);
1087 37405594 : if (dump_file)
1088 1205 : fprintf (dump_file, "scanning new insn with uid = %d.\n", uid);
1089 : }
1090 :
1091 96356079 : df_refs_add_to_chains (&collection_rec, bb, insn, copy_all);
1092 96356079 : if (!DEBUG_INSN_P (insn))
1093 90303800 : df_set_bb_dirty (bb);
1094 :
1095 : return true;
1096 1053273390 : }
1097 :
1098 : /* Same as df_insn_rescan, but don't mark the basic block as
1099 : dirty. */
1100 :
1101 : bool
1102 138252 : df_insn_rescan_debug_internal (rtx_insn *insn)
1103 : {
1104 138252 : unsigned int uid = INSN_UID (insn);
1105 138252 : struct df_insn_info *insn_info;
1106 :
1107 138252 : gcc_assert (DEBUG_INSN_P (insn)
1108 : && VAR_LOC_UNKNOWN_P (INSN_VAR_LOCATION_LOC (insn)));
1109 :
1110 138252 : if (!df)
1111 : return false;
1112 :
1113 138252 : insn_info = DF_INSN_UID_SAFE_GET (INSN_UID (insn));
1114 138252 : if (!insn_info)
1115 : return false;
1116 :
1117 138252 : if (dump_file)
1118 0 : fprintf (dump_file, "deleting debug_insn with uid = %d.\n", uid);
1119 :
1120 138252 : bitmap_clear_bit (&df->insns_to_delete, uid);
1121 138252 : bitmap_clear_bit (&df->insns_to_rescan, uid);
1122 138252 : bitmap_clear_bit (&df->insns_to_notes_rescan, uid);
1123 :
1124 138252 : if (insn_info->defs == 0
1125 138252 : && insn_info->uses == 0
1126 0 : && insn_info->eq_uses == 0
1127 0 : && insn_info->mw_hardregs == 0)
1128 : return false;
1129 :
1130 138252 : df_mw_hardreg_chain_delete (insn_info->mw_hardregs);
1131 :
1132 138252 : if (df_chain)
1133 : {
1134 124203 : df_ref_chain_delete_du_chain (insn_info->defs);
1135 124203 : df_ref_chain_delete_du_chain (insn_info->uses);
1136 124203 : df_ref_chain_delete_du_chain (insn_info->eq_uses);
1137 : }
1138 :
1139 138252 : df_ref_chain_delete (insn_info->defs);
1140 138252 : df_ref_chain_delete (insn_info->uses);
1141 138252 : df_ref_chain_delete (insn_info->eq_uses);
1142 :
1143 138252 : insn_info->defs = 0;
1144 138252 : insn_info->uses = 0;
1145 138252 : insn_info->eq_uses = 0;
1146 138252 : insn_info->mw_hardregs = 0;
1147 :
1148 138252 : return true;
1149 : }
1150 :
1151 :
1152 : /* Rescan all of the insns in the function. Note that the artificial
1153 : uses and defs are not touched. This function will destroy def-use
1154 : or use-def chains. */
1155 :
1156 : void
1157 34835 : df_insn_rescan_all (void)
1158 : {
1159 34835 : bool no_insn_rescan = false;
1160 34835 : bool defer_insn_rescan = false;
1161 34835 : basic_block bb;
1162 34835 : bitmap_iterator bi;
1163 34835 : unsigned int uid;
1164 :
1165 34835 : if (df->changeable_flags & DF_NO_INSN_RESCAN)
1166 : {
1167 0 : df_clear_flags (DF_NO_INSN_RESCAN);
1168 0 : no_insn_rescan = true;
1169 : }
1170 :
1171 34835 : if (df->changeable_flags & DF_DEFER_INSN_RESCAN)
1172 : {
1173 0 : df_clear_flags (DF_DEFER_INSN_RESCAN);
1174 0 : defer_insn_rescan = true;
1175 : }
1176 :
1177 34835 : auto_bitmap tmp (&df_bitmap_obstack);
1178 34835 : bitmap_copy (tmp, &df->insns_to_delete);
1179 34835 : EXECUTE_IF_SET_IN_BITMAP (tmp, 0, uid, bi)
1180 : {
1181 0 : struct df_insn_info *insn_info = DF_INSN_UID_SAFE_GET (uid);
1182 0 : if (insn_info)
1183 0 : df_insn_info_delete (uid);
1184 : }
1185 :
1186 34835 : bitmap_clear (&df->insns_to_delete);
1187 34835 : bitmap_clear (&df->insns_to_rescan);
1188 34835 : bitmap_clear (&df->insns_to_notes_rescan);
1189 :
1190 1259416 : FOR_EACH_BB_FN (bb, cfun)
1191 : {
1192 1224581 : rtx_insn *insn;
1193 13553398 : FOR_BB_INSNS (bb, insn)
1194 : {
1195 12328817 : df_insn_rescan (insn);
1196 : }
1197 : }
1198 :
1199 34835 : if (no_insn_rescan)
1200 0 : df_set_flags (DF_NO_INSN_RESCAN);
1201 34835 : if (defer_insn_rescan)
1202 0 : df_set_flags (DF_DEFER_INSN_RESCAN);
1203 34835 : }
1204 :
1205 :
1206 : /* Process all of the deferred rescans or deletions. */
1207 :
1208 : void
1209 87727683 : df_process_deferred_rescans (void)
1210 : {
1211 87727683 : bool no_insn_rescan = false;
1212 87727683 : bool defer_insn_rescan = false;
1213 87727683 : bitmap_iterator bi;
1214 87727683 : unsigned int uid;
1215 :
1216 87727683 : if (df->changeable_flags & DF_NO_INSN_RESCAN)
1217 : {
1218 0 : df_clear_flags (DF_NO_INSN_RESCAN);
1219 0 : no_insn_rescan = true;
1220 : }
1221 :
1222 87727683 : if (df->changeable_flags & DF_DEFER_INSN_RESCAN)
1223 : {
1224 11814501 : df_clear_flags (DF_DEFER_INSN_RESCAN);
1225 11814501 : defer_insn_rescan = true;
1226 : }
1227 :
1228 87727683 : if (dump_file)
1229 3401 : fprintf (dump_file, "starting the processing of deferred insns\n");
1230 :
1231 87727683 : auto_bitmap tmp (&df_bitmap_obstack);
1232 87727683 : bitmap_copy (tmp, &df->insns_to_delete);
1233 92866235 : EXECUTE_IF_SET_IN_BITMAP (tmp, 0, uid, bi)
1234 : {
1235 5138552 : struct df_insn_info *insn_info = DF_INSN_UID_SAFE_GET (uid);
1236 5138552 : if (insn_info)
1237 5138552 : df_insn_info_delete (uid);
1238 : }
1239 :
1240 87727683 : bitmap_copy (tmp, &df->insns_to_rescan);
1241 377975650 : EXECUTE_IF_SET_IN_BITMAP (tmp, 0, uid, bi)
1242 : {
1243 290247967 : struct df_insn_info *insn_info = DF_INSN_UID_SAFE_GET (uid);
1244 290247967 : if (insn_info)
1245 290247967 : df_insn_rescan (insn_info->insn);
1246 : }
1247 :
1248 87727683 : bitmap_copy (tmp, &df->insns_to_notes_rescan);
1249 87803013 : EXECUTE_IF_SET_IN_BITMAP (tmp, 0, uid, bi)
1250 : {
1251 75330 : struct df_insn_info *insn_info = DF_INSN_UID_SAFE_GET (uid);
1252 75330 : if (insn_info)
1253 75330 : df_notes_rescan (insn_info->insn);
1254 : }
1255 :
1256 87727683 : if (dump_file)
1257 3401 : fprintf (dump_file, "ending the processing of deferred insns\n");
1258 :
1259 87727683 : bitmap_clear (&df->insns_to_delete);
1260 87727683 : bitmap_clear (&df->insns_to_rescan);
1261 87727683 : bitmap_clear (&df->insns_to_notes_rescan);
1262 :
1263 87727683 : if (no_insn_rescan)
1264 0 : df_set_flags (DF_NO_INSN_RESCAN);
1265 87727683 : if (defer_insn_rescan)
1266 11814501 : df_set_flags (DF_DEFER_INSN_RESCAN);
1267 :
1268 : /* If someone changed regs_ever_live during this pass, fix up the
1269 : entry and exit blocks. */
1270 87727683 : if (df->redo_entry_and_exit)
1271 : {
1272 878100 : df_update_entry_exit_and_calls ();
1273 878100 : df->redo_entry_and_exit = false;
1274 : }
1275 87727683 : }
1276 :
1277 :
1278 : /* Count the number of refs. Include the defs if INCLUDE_DEFS. Include
1279 : the uses if INCLUDE_USES. Include the eq_uses if
1280 : INCLUDE_EQ_USES. */
1281 :
1282 : static unsigned int
1283 6009284 : df_count_refs (bool include_defs, bool include_uses,
1284 : bool include_eq_uses)
1285 : {
1286 6009284 : unsigned int regno;
1287 6009284 : int size = 0;
1288 6009284 : unsigned int m = df->regs_inited;
1289 :
1290 1457832861 : for (regno = 0; regno < m; regno++)
1291 : {
1292 1451823577 : if (include_defs)
1293 1451823577 : size += DF_REG_DEF_COUNT (regno);
1294 1451823577 : if (include_uses)
1295 0 : size += DF_REG_USE_COUNT (regno);
1296 1451823577 : if (include_eq_uses)
1297 0 : size += DF_REG_EQ_USE_COUNT (regno);
1298 : }
1299 6009284 : return size;
1300 : }
1301 :
1302 :
1303 : /* Take build ref table for either the uses or defs from the reg-use
1304 : or reg-def chains. This version processes the refs in reg order
1305 : which is likely to be best if processing the whole function. */
1306 :
1307 : static void
1308 4705096 : df_reorganize_refs_by_reg_by_reg (struct df_ref_info *ref_info,
1309 : bool include_defs,
1310 : bool include_uses,
1311 : bool include_eq_uses)
1312 : {
1313 4705096 : unsigned int m = df->regs_inited;
1314 4705096 : unsigned int regno;
1315 4705096 : unsigned int offset = 0;
1316 4705096 : unsigned int start;
1317 :
1318 4705096 : if (df->changeable_flags & DF_NO_HARD_REGS)
1319 : {
1320 22385 : start = FIRST_PSEUDO_REGISTER;
1321 22385 : memset (ref_info->begin, 0, sizeof (int) * FIRST_PSEUDO_REGISTER);
1322 22385 : memset (ref_info->count, 0, sizeof (int) * FIRST_PSEUDO_REGISTER);
1323 : }
1324 : else
1325 : start = 0;
1326 :
1327 4705096 : ref_info->total_size
1328 4705096 : = df_count_refs (include_defs, include_uses, include_eq_uses);
1329 :
1330 4705096 : df_check_and_grow_ref_info (ref_info, 1);
1331 :
1332 676191083 : for (regno = start; regno < m; regno++)
1333 : {
1334 671485987 : int count = 0;
1335 671485987 : ref_info->begin[regno] = offset;
1336 671485987 : if (include_defs)
1337 : {
1338 671485987 : df_ref ref = DF_REG_DEF_CHAIN (regno);
1339 2692014896 : while (ref)
1340 : {
1341 2020528909 : ref_info->refs[offset] = ref;
1342 2020528909 : DF_REF_ID (ref) = offset++;
1343 2020528909 : count++;
1344 2020528909 : ref = DF_REF_NEXT_REG (ref);
1345 2020528909 : gcc_checking_assert (offset < ref_info->refs_size);
1346 : }
1347 : }
1348 671485987 : if (include_uses)
1349 : {
1350 0 : df_ref ref = DF_REG_USE_CHAIN (regno);
1351 0 : while (ref)
1352 : {
1353 0 : ref_info->refs[offset] = ref;
1354 0 : DF_REF_ID (ref) = offset++;
1355 0 : count++;
1356 0 : ref = DF_REF_NEXT_REG (ref);
1357 0 : gcc_checking_assert (offset < ref_info->refs_size);
1358 : }
1359 : }
1360 671485987 : if (include_eq_uses)
1361 : {
1362 0 : df_ref ref = DF_REG_EQ_USE_CHAIN (regno);
1363 0 : while (ref)
1364 : {
1365 0 : ref_info->refs[offset] = ref;
1366 0 : DF_REF_ID (ref) = offset++;
1367 0 : count++;
1368 0 : ref = DF_REF_NEXT_REG (ref);
1369 0 : gcc_checking_assert (offset < ref_info->refs_size);
1370 : }
1371 : }
1372 671485987 : ref_info->count[regno] = count;
1373 : }
1374 :
1375 : /* The bitmap size is not decremented when refs are deleted. So
1376 : reset it now that we have squished out all of the empty
1377 : slots. */
1378 4705096 : ref_info->table_size = offset;
1379 4705096 : }
1380 :
1381 :
1382 : /* Take build ref table for either the uses or defs from the reg-use
1383 : or reg-def chains. This version processes the refs in insn order
1384 : which is likely to be best if processing some segment of the
1385 : function. */
1386 :
1387 : static void
1388 1304188 : df_reorganize_refs_by_reg_by_insn (struct df_ref_info *ref_info,
1389 : bool include_defs,
1390 : bool include_uses,
1391 : bool include_eq_uses)
1392 : {
1393 1304188 : bitmap_iterator bi;
1394 1304188 : unsigned int bb_index;
1395 1304188 : unsigned int m = df->regs_inited;
1396 1304188 : unsigned int offset = 0;
1397 1304188 : unsigned int r;
1398 1304188 : unsigned int start
1399 1304188 : = (df->changeable_flags & DF_NO_HARD_REGS) ? FIRST_PSEUDO_REGISTER : 0;
1400 :
1401 1304188 : memset (ref_info->begin, 0, sizeof (int) * df->regs_inited);
1402 1304188 : memset (ref_info->count, 0, sizeof (int) * df->regs_inited);
1403 :
1404 1304188 : ref_info->total_size = df_count_refs (include_defs, include_uses, include_eq_uses);
1405 1304188 : df_check_and_grow_ref_info (ref_info, 1);
1406 :
1407 9262062 : EXECUTE_IF_SET_IN_BITMAP (df->blocks_to_analyze, 0, bb_index, bi)
1408 : {
1409 7957874 : basic_block bb = BASIC_BLOCK_FOR_FN (cfun, bb_index);
1410 7957874 : rtx_insn *insn;
1411 7957874 : df_ref def, use;
1412 :
1413 7957874 : if (include_defs)
1414 15987477 : FOR_EACH_ARTIFICIAL_DEF (def, bb_index)
1415 : {
1416 71729 : unsigned int regno = DF_REF_REGNO (def);
1417 71729 : ref_info->count[regno]++;
1418 : }
1419 7957874 : if (include_uses)
1420 0 : FOR_EACH_ARTIFICIAL_USE (use, bb_index)
1421 : {
1422 0 : unsigned int regno = DF_REF_REGNO (use);
1423 0 : ref_info->count[regno]++;
1424 : }
1425 :
1426 90018949 : FOR_BB_INSNS (bb, insn)
1427 : {
1428 82061075 : if (INSN_P (insn))
1429 : {
1430 68692572 : struct df_insn_info *insn_info = DF_INSN_INFO_GET (insn);
1431 :
1432 68692572 : if (include_defs)
1433 221867268 : FOR_EACH_INSN_INFO_DEF (def, insn_info)
1434 : {
1435 153174696 : unsigned int regno = DF_REF_REGNO (def);
1436 153174696 : ref_info->count[regno]++;
1437 : }
1438 68692572 : if (include_uses)
1439 0 : FOR_EACH_INSN_INFO_USE (use, insn_info)
1440 : {
1441 0 : unsigned int regno = DF_REF_REGNO (use);
1442 0 : ref_info->count[regno]++;
1443 : }
1444 68692572 : if (include_eq_uses)
1445 0 : FOR_EACH_INSN_INFO_EQ_USE (use, insn_info)
1446 : {
1447 0 : unsigned int regno = DF_REF_REGNO (use);
1448 0 : ref_info->count[regno]++;
1449 : }
1450 : }
1451 : }
1452 : }
1453 :
1454 779582358 : for (r = start; r < m; r++)
1455 : {
1456 778278170 : ref_info->begin[r] = offset;
1457 778278170 : offset += ref_info->count[r];
1458 778278170 : ref_info->count[r] = 0;
1459 : }
1460 :
1461 9262062 : EXECUTE_IF_SET_IN_BITMAP (df->blocks_to_analyze, 0, bb_index, bi)
1462 : {
1463 7957874 : basic_block bb = BASIC_BLOCK_FOR_FN (cfun, bb_index);
1464 7957874 : rtx_insn *insn;
1465 7957874 : df_ref def, use;
1466 :
1467 7957874 : if (include_defs)
1468 15987477 : FOR_EACH_ARTIFICIAL_DEF (def, bb_index)
1469 : {
1470 71729 : unsigned int regno = DF_REF_REGNO (def);
1471 71729 : if (regno >= start)
1472 : {
1473 71729 : unsigned int id
1474 71729 : = ref_info->begin[regno] + ref_info->count[regno]++;
1475 71729 : DF_REF_ID (def) = id;
1476 71729 : ref_info->refs[id] = def;
1477 : }
1478 : }
1479 7957874 : if (include_uses)
1480 0 : FOR_EACH_ARTIFICIAL_USE (use, bb_index)
1481 : {
1482 0 : unsigned int regno = DF_REF_REGNO (def);
1483 0 : if (regno >= start)
1484 : {
1485 0 : unsigned int id
1486 0 : = ref_info->begin[regno] + ref_info->count[regno]++;
1487 0 : DF_REF_ID (use) = id;
1488 0 : ref_info->refs[id] = use;
1489 : }
1490 : }
1491 :
1492 90018949 : FOR_BB_INSNS (bb, insn)
1493 : {
1494 82061075 : if (INSN_P (insn))
1495 : {
1496 68692572 : struct df_insn_info *insn_info = DF_INSN_INFO_GET (insn);
1497 :
1498 68692572 : if (include_defs)
1499 221867268 : FOR_EACH_INSN_INFO_DEF (def, insn_info)
1500 : {
1501 153174696 : unsigned int regno = DF_REF_REGNO (def);
1502 153174696 : if (regno >= start)
1503 : {
1504 153174696 : unsigned int id
1505 153174696 : = ref_info->begin[regno] + ref_info->count[regno]++;
1506 153174696 : DF_REF_ID (def) = id;
1507 153174696 : ref_info->refs[id] = def;
1508 : }
1509 : }
1510 68692572 : if (include_uses)
1511 0 : FOR_EACH_INSN_INFO_USE (use, insn_info)
1512 : {
1513 0 : unsigned int regno = DF_REF_REGNO (use);
1514 0 : if (regno >= start)
1515 : {
1516 0 : unsigned int id
1517 0 : = ref_info->begin[regno] + ref_info->count[regno]++;
1518 0 : DF_REF_ID (use) = id;
1519 0 : ref_info->refs[id] = use;
1520 : }
1521 : }
1522 68692572 : if (include_eq_uses)
1523 0 : FOR_EACH_INSN_INFO_EQ_USE (use, insn_info)
1524 : {
1525 0 : unsigned int regno = DF_REF_REGNO (use);
1526 0 : if (regno >= start)
1527 : {
1528 0 : unsigned int id
1529 0 : = ref_info->begin[regno] + ref_info->count[regno]++;
1530 0 : DF_REF_ID (use) = id;
1531 0 : ref_info->refs[id] = use;
1532 : }
1533 : }
1534 : }
1535 : }
1536 : }
1537 :
1538 : /* The bitmap size is not decremented when refs are deleted. So
1539 : reset it now that we have squished out all of the empty
1540 : slots. */
1541 :
1542 1304188 : ref_info->table_size = offset;
1543 1304188 : }
1544 :
1545 : /* Take build ref table for either the uses or defs from the reg-use
1546 : or reg-def chains. */
1547 :
1548 : static void
1549 6009284 : df_reorganize_refs_by_reg (struct df_ref_info *ref_info,
1550 : bool include_defs,
1551 : bool include_uses,
1552 : bool include_eq_uses)
1553 : {
1554 6009284 : if (df->analyze_subset)
1555 1304188 : df_reorganize_refs_by_reg_by_insn (ref_info, include_defs,
1556 : include_uses, include_eq_uses);
1557 : else
1558 4705096 : df_reorganize_refs_by_reg_by_reg (ref_info, include_defs,
1559 : include_uses, include_eq_uses);
1560 6009284 : }
1561 :
1562 :
1563 : /* Add the refs in REF_VEC to the table in REF_INFO starting at OFFSET. */
1564 : static unsigned int
1565 0 : df_add_refs_to_table (unsigned int offset,
1566 : struct df_ref_info *ref_info,
1567 : df_ref ref)
1568 : {
1569 0 : for (; ref; ref = DF_REF_NEXT_LOC (ref))
1570 0 : if (!(df->changeable_flags & DF_NO_HARD_REGS)
1571 0 : || (DF_REF_REGNO (ref) >= FIRST_PSEUDO_REGISTER))
1572 : {
1573 0 : ref_info->refs[offset] = ref;
1574 0 : DF_REF_ID (ref) = offset++;
1575 : }
1576 0 : return offset;
1577 : }
1578 :
1579 :
1580 : /* Count the number of refs in all of the insns of BB. Include the
1581 : defs if INCLUDE_DEFS. Include the uses if INCLUDE_USES. Include the
1582 : eq_uses if INCLUDE_EQ_USES. */
1583 :
1584 : static unsigned int
1585 0 : df_reorganize_refs_by_insn_bb (basic_block bb, unsigned int offset,
1586 : struct df_ref_info *ref_info,
1587 : bool include_defs, bool include_uses,
1588 : bool include_eq_uses)
1589 : {
1590 0 : rtx_insn *insn;
1591 :
1592 0 : if (include_defs)
1593 0 : offset = df_add_refs_to_table (offset, ref_info,
1594 0 : df_get_artificial_defs (bb->index));
1595 0 : if (include_uses)
1596 0 : offset = df_add_refs_to_table (offset, ref_info,
1597 0 : df_get_artificial_uses (bb->index));
1598 :
1599 0 : FOR_BB_INSNS (bb, insn)
1600 0 : if (INSN_P (insn))
1601 : {
1602 0 : unsigned int uid = INSN_UID (insn);
1603 0 : if (include_defs)
1604 0 : offset = df_add_refs_to_table (offset, ref_info,
1605 0 : DF_INSN_UID_DEFS (uid));
1606 0 : if (include_uses)
1607 0 : offset = df_add_refs_to_table (offset, ref_info,
1608 0 : DF_INSN_UID_USES (uid));
1609 0 : if (include_eq_uses)
1610 0 : offset = df_add_refs_to_table (offset, ref_info,
1611 0 : DF_INSN_UID_EQ_USES (uid));
1612 : }
1613 0 : return offset;
1614 : }
1615 :
1616 :
1617 : /* Organize the refs by insn into the table in REF_INFO. If
1618 : blocks_to_analyze is defined, use that set, otherwise the entire
1619 : program. Include the defs if INCLUDE_DEFS. Include the uses if
1620 : INCLUDE_USES. Include the eq_uses if INCLUDE_EQ_USES. */
1621 :
1622 : static void
1623 0 : df_reorganize_refs_by_insn (struct df_ref_info *ref_info,
1624 : bool include_defs, bool include_uses,
1625 : bool include_eq_uses)
1626 : {
1627 0 : basic_block bb;
1628 0 : unsigned int offset = 0;
1629 :
1630 0 : ref_info->total_size = df_count_refs (include_defs, include_uses, include_eq_uses);
1631 0 : df_check_and_grow_ref_info (ref_info, 1);
1632 0 : if (df->blocks_to_analyze)
1633 : {
1634 0 : bitmap_iterator bi;
1635 0 : unsigned int index;
1636 :
1637 0 : EXECUTE_IF_SET_IN_BITMAP (df->blocks_to_analyze, 0, index, bi)
1638 : {
1639 0 : offset = df_reorganize_refs_by_insn_bb (BASIC_BLOCK_FOR_FN (cfun,
1640 : index),
1641 : offset, ref_info,
1642 : include_defs, include_uses,
1643 : include_eq_uses);
1644 : }
1645 :
1646 0 : ref_info->table_size = offset;
1647 : }
1648 : else
1649 : {
1650 0 : FOR_ALL_BB_FN (bb, cfun)
1651 0 : offset = df_reorganize_refs_by_insn_bb (bb, offset, ref_info,
1652 : include_defs, include_uses,
1653 : include_eq_uses);
1654 0 : ref_info->table_size = offset;
1655 : }
1656 0 : }
1657 :
1658 :
1659 : /* If the use refs in DF are not organized, reorganize them. */
1660 :
1661 : void
1662 42160707 : df_maybe_reorganize_use_refs (enum df_ref_order order)
1663 : {
1664 42160707 : if (order == df->use_info.ref_order)
1665 : return;
1666 :
1667 0 : switch (order)
1668 : {
1669 0 : case DF_REF_ORDER_BY_REG:
1670 0 : df_reorganize_refs_by_reg (&df->use_info, false, true, false);
1671 0 : break;
1672 :
1673 0 : case DF_REF_ORDER_BY_REG_WITH_NOTES:
1674 0 : df_reorganize_refs_by_reg (&df->use_info, false, true, true);
1675 0 : break;
1676 :
1677 0 : case DF_REF_ORDER_BY_INSN:
1678 0 : df_reorganize_refs_by_insn (&df->use_info, false, true, false);
1679 0 : break;
1680 :
1681 0 : case DF_REF_ORDER_BY_INSN_WITH_NOTES:
1682 0 : df_reorganize_refs_by_insn (&df->use_info, false, true, true);
1683 0 : break;
1684 :
1685 0 : case DF_REF_ORDER_NO_TABLE:
1686 0 : free (df->use_info.refs);
1687 0 : df->use_info.refs = NULL;
1688 0 : df->use_info.refs_size = 0;
1689 0 : break;
1690 :
1691 0 : case DF_REF_ORDER_UNORDERED:
1692 0 : case DF_REF_ORDER_UNORDERED_WITH_NOTES:
1693 0 : gcc_unreachable ();
1694 0 : break;
1695 : }
1696 :
1697 0 : df->use_info.ref_order = order;
1698 : }
1699 :
1700 :
1701 : /* If the def refs in DF are not organized, reorganize them. */
1702 :
1703 : void
1704 48169991 : df_maybe_reorganize_def_refs (enum df_ref_order order)
1705 : {
1706 48169991 : if (order == df->def_info.ref_order)
1707 : return;
1708 :
1709 12018568 : switch (order)
1710 : {
1711 6009284 : case DF_REF_ORDER_BY_REG:
1712 6009284 : df_reorganize_refs_by_reg (&df->def_info, true, false, false);
1713 6009284 : break;
1714 :
1715 0 : case DF_REF_ORDER_BY_INSN:
1716 0 : df_reorganize_refs_by_insn (&df->def_info, true, false, false);
1717 0 : break;
1718 :
1719 6009284 : case DF_REF_ORDER_NO_TABLE:
1720 6009284 : free (df->def_info.refs);
1721 6009284 : df->def_info.refs = NULL;
1722 6009284 : df->def_info.refs_size = 0;
1723 6009284 : break;
1724 :
1725 0 : case DF_REF_ORDER_BY_INSN_WITH_NOTES:
1726 0 : case DF_REF_ORDER_BY_REG_WITH_NOTES:
1727 0 : case DF_REF_ORDER_UNORDERED:
1728 0 : case DF_REF_ORDER_UNORDERED_WITH_NOTES:
1729 0 : gcc_unreachable ();
1730 12018568 : break;
1731 : }
1732 :
1733 12018568 : df->def_info.ref_order = order;
1734 : }
1735 :
1736 :
1737 : /* Change all of the basic block references in INSN to use the insn's
1738 : current basic block. This function is called from routines that move
1739 : instructions from one block to another. */
1740 :
1741 : void
1742 291598527 : df_insn_change_bb (rtx_insn *insn, basic_block new_bb)
1743 : {
1744 291598527 : basic_block old_bb = BLOCK_FOR_INSN (insn);
1745 291598527 : struct df_insn_info *insn_info;
1746 291598527 : unsigned int uid = INSN_UID (insn);
1747 :
1748 291598527 : if (old_bb == new_bb)
1749 : return;
1750 :
1751 258832661 : set_block_for_insn (insn, new_bb);
1752 :
1753 258832661 : if (!df)
1754 : return;
1755 :
1756 31415632 : if (dump_file)
1757 5864 : fprintf (dump_file, "changing bb of uid %d\n", uid);
1758 :
1759 31415632 : insn_info = DF_INSN_UID_SAFE_GET (uid);
1760 31236964 : if (insn_info == NULL)
1761 : {
1762 12003310 : if (dump_file)
1763 5541 : fprintf (dump_file, " unscanned insn\n");
1764 12003310 : df_insn_rescan (insn);
1765 12003310 : return;
1766 : }
1767 :
1768 19412322 : if (!INSN_P (insn))
1769 : return;
1770 :
1771 17269653 : if (!DEBUG_INSN_P (insn))
1772 13613801 : df_set_bb_dirty (new_bb);
1773 17269653 : if (old_bb)
1774 : {
1775 17264782 : if (dump_file)
1776 288 : fprintf (dump_file, " from %d to %d\n",
1777 : old_bb->index, new_bb->index);
1778 17264782 : if (!DEBUG_INSN_P (insn))
1779 13608974 : df_set_bb_dirty (old_bb);
1780 : }
1781 : else
1782 4871 : if (dump_file)
1783 0 : fprintf (dump_file, " to %d\n", new_bb->index);
1784 : }
1785 :
1786 :
1787 : /* Helper function for df_ref_change_reg_with_loc. */
1788 :
1789 : static void
1790 104735199 : df_ref_change_reg_with_loc_1 (struct df_reg_info *old_df,
1791 : struct df_reg_info *new_df,
1792 : unsigned int new_regno, rtx loc)
1793 : {
1794 104735199 : df_ref the_ref = old_df->reg_chain;
1795 :
1796 195499305 : while (the_ref)
1797 : {
1798 90764106 : if ((!DF_REF_IS_ARTIFICIAL (the_ref))
1799 90764106 : && DF_REF_LOC (the_ref)
1800 90764106 : && (*DF_REF_LOC (the_ref) == loc))
1801 : {
1802 84107157 : df_ref next_ref = DF_REF_NEXT_REG (the_ref);
1803 84107157 : df_ref prev_ref = DF_REF_PREV_REG (the_ref);
1804 84107157 : df_ref *ref_ptr;
1805 84107157 : struct df_insn_info *insn_info = DF_REF_INSN_INFO (the_ref);
1806 :
1807 84107157 : DF_REF_REGNO (the_ref) = new_regno;
1808 84107157 : DF_REF_REG (the_ref) = regno_reg_rtx[new_regno];
1809 :
1810 : /* Pull the_ref out of the old regno chain. */
1811 84107157 : if (prev_ref)
1812 2598264 : DF_REF_NEXT_REG (prev_ref) = next_ref;
1813 : else
1814 81508893 : old_df->reg_chain = next_ref;
1815 84107157 : if (next_ref)
1816 29326772 : DF_REF_PREV_REG (next_ref) = prev_ref;
1817 84107157 : old_df->n_refs--;
1818 :
1819 : /* Put the ref into the new regno chain. */
1820 84107157 : DF_REF_PREV_REG (the_ref) = NULL;
1821 84107157 : DF_REF_NEXT_REG (the_ref) = new_df->reg_chain;
1822 84107157 : if (new_df->reg_chain)
1823 80283525 : DF_REF_PREV_REG (new_df->reg_chain) = the_ref;
1824 84107157 : new_df->reg_chain = the_ref;
1825 84107157 : new_df->n_refs++;
1826 84107157 : if (DF_REF_BB (the_ref))
1827 84107157 : df_set_bb_dirty (DF_REF_BB (the_ref));
1828 :
1829 : /* Need to sort the record again that the ref was in because
1830 : the regno is a sorting key. First, find the right
1831 : record. */
1832 84107157 : if (DF_REF_REG_DEF_P (the_ref))
1833 31898368 : ref_ptr = &insn_info->defs;
1834 52208789 : else if (DF_REF_FLAGS (the_ref) & DF_REF_IN_NOTE)
1835 1791193 : ref_ptr = &insn_info->eq_uses;
1836 : else
1837 50417596 : ref_ptr = &insn_info->uses;
1838 84107157 : if (dump_file)
1839 2322 : fprintf (dump_file, "changing reg in insn %d\n",
1840 2322 : DF_REF_INSN_UID (the_ref));
1841 :
1842 : /* Stop if we find the current reference or where the reference
1843 : needs to be. */
1844 91315486 : while (*ref_ptr != the_ref && df_ref_compare (*ref_ptr, the_ref) < 0)
1845 7208329 : ref_ptr = &DF_REF_NEXT_LOC (*ref_ptr);
1846 84107157 : if (*ref_ptr != the_ref)
1847 : {
1848 : /* The reference needs to be promoted up the list. */
1849 16186593 : df_ref next = DF_REF_NEXT_LOC (the_ref);
1850 16186593 : DF_REF_NEXT_LOC (the_ref) = *ref_ptr;
1851 16186593 : *ref_ptr = the_ref;
1852 33815076 : do
1853 33815076 : ref_ptr = &DF_REF_NEXT_LOC (*ref_ptr);
1854 33815076 : while (*ref_ptr != the_ref);
1855 16186593 : *ref_ptr = next;
1856 : }
1857 67920564 : else if (DF_REF_NEXT_LOC (the_ref)
1858 67920564 : && df_ref_compare (the_ref, DF_REF_NEXT_LOC (the_ref)) > 0)
1859 : {
1860 : /* The reference needs to be demoted down the list. */
1861 0 : *ref_ptr = DF_REF_NEXT_LOC (the_ref);
1862 0 : do
1863 0 : ref_ptr = &DF_REF_NEXT_LOC (*ref_ptr);
1864 0 : while (*ref_ptr && df_ref_compare (the_ref, *ref_ptr) > 0);
1865 0 : DF_REF_NEXT_LOC (the_ref) = *ref_ptr;
1866 0 : *ref_ptr = the_ref;
1867 : }
1868 :
1869 : the_ref = next_ref;
1870 : }
1871 : else
1872 6656949 : the_ref = DF_REF_NEXT_REG (the_ref);
1873 : }
1874 104735199 : }
1875 :
1876 :
1877 : /* Change the regno of register LOC to NEW_REGNO and update the df
1878 : information accordingly. Refs that do not match LOC are not changed
1879 : which means that artificial refs are not changed since they have no loc.
1880 : This call is to support the SET_REGNO macro. */
1881 :
1882 : void
1883 34911733 : df_ref_change_reg_with_loc (rtx loc, unsigned int new_regno)
1884 : {
1885 34911733 : unsigned int old_regno = REGNO (loc);
1886 34911733 : if (old_regno == new_regno)
1887 : return;
1888 :
1889 34911733 : if (df)
1890 : {
1891 34911733 : df_grow_reg_info ();
1892 :
1893 34911733 : df_ref_change_reg_with_loc_1 (DF_REG_DEF_GET (old_regno),
1894 34911733 : DF_REG_DEF_GET (new_regno),
1895 : new_regno, loc);
1896 34911733 : df_ref_change_reg_with_loc_1 (DF_REG_USE_GET (old_regno),
1897 34911733 : DF_REG_USE_GET (new_regno),
1898 : new_regno, loc);
1899 34911733 : df_ref_change_reg_with_loc_1 (DF_REG_EQ_USE_GET (old_regno),
1900 34911733 : DF_REG_EQ_USE_GET (new_regno),
1901 : new_regno, loc);
1902 : }
1903 34911733 : set_mode_and_regno (loc, GET_MODE (loc), new_regno);
1904 : }
1905 :
1906 :
1907 : /* Delete the mw_hardregs that point into the eq_notes. */
1908 :
1909 : static void
1910 16887807 : df_mw_hardreg_chain_delete_eq_uses (struct df_insn_info *insn_info)
1911 : {
1912 16887807 : struct df_mw_hardreg **mw_ptr = &insn_info->mw_hardregs;
1913 16887807 : struct df_scan_problem_data *problem_data
1914 16887807 : = (struct df_scan_problem_data *) df_scan->problem_data;
1915 :
1916 16905976 : while (*mw_ptr)
1917 : {
1918 18169 : df_mw_hardreg *mw = *mw_ptr;
1919 18169 : if (mw->flags & DF_REF_IN_NOTE)
1920 : {
1921 2 : *mw_ptr = DF_MWS_NEXT (mw);
1922 2 : problem_data->mw_reg_pool->remove (mw);
1923 : }
1924 : else
1925 18167 : mw_ptr = &DF_MWS_NEXT (mw);
1926 : }
1927 16887807 : }
1928 :
1929 :
1930 : /* Rescan only the REG_EQUIV/REG_EQUAL notes part of INSN. */
1931 :
1932 : void
1933 44247918 : df_notes_rescan (rtx_insn *insn)
1934 : {
1935 44247918 : struct df_insn_info *insn_info;
1936 44247918 : unsigned int uid = INSN_UID (insn);
1937 :
1938 44247918 : if (!df)
1939 : return;
1940 :
1941 : /* The client has disabled rescanning and plans to do it itself. */
1942 40299168 : if (df->changeable_flags & DF_NO_INSN_RESCAN)
1943 : return;
1944 :
1945 : /* Do nothing if the insn hasn't been emitted yet. */
1946 40279893 : if (!BLOCK_FOR_INSN (insn))
1947 : return;
1948 :
1949 40264361 : df_grow_bb_info (df_scan);
1950 40264361 : df_grow_reg_info ();
1951 :
1952 40264361 : insn_info = DF_INSN_UID_SAFE_GET (INSN_UID (insn));
1953 :
1954 : /* The client has deferred rescanning. */
1955 40264361 : if (df->changeable_flags & DF_DEFER_INSN_RESCAN)
1956 : {
1957 23376554 : if (!insn_info)
1958 : {
1959 0 : insn_info = df_insn_create_insn_record (insn);
1960 0 : insn_info->defs = 0;
1961 0 : insn_info->uses = 0;
1962 0 : insn_info->eq_uses = 0;
1963 0 : insn_info->mw_hardregs = 0;
1964 : }
1965 :
1966 23376554 : bitmap_clear_bit (&df->insns_to_delete, uid);
1967 : /* If the insn is set to be rescanned, it does not need to also
1968 : be notes rescanned. */
1969 23376554 : if (!bitmap_bit_p (&df->insns_to_rescan, uid))
1970 2603854 : bitmap_set_bit (&df->insns_to_notes_rescan, INSN_UID (insn));
1971 23376554 : return;
1972 : }
1973 :
1974 16887807 : bitmap_clear_bit (&df->insns_to_delete, uid);
1975 16887807 : bitmap_clear_bit (&df->insns_to_notes_rescan, uid);
1976 :
1977 16887807 : if (insn_info)
1978 : {
1979 16887807 : basic_block bb = BLOCK_FOR_INSN (insn);
1980 16887807 : rtx note;
1981 16887807 : class df_collection_rec collection_rec;
1982 16887807 : unsigned int i;
1983 :
1984 16887807 : df_mw_hardreg_chain_delete_eq_uses (insn_info);
1985 16887807 : df_ref_chain_delete (insn_info->eq_uses);
1986 16887807 : insn_info->eq_uses = NULL;
1987 :
1988 : /* Process REG_EQUIV/REG_EQUAL notes */
1989 38667714 : for (note = REG_NOTES (insn); note;
1990 21779907 : note = XEXP (note, 1))
1991 : {
1992 21779907 : switch (REG_NOTE_KIND (note))
1993 : {
1994 12127484 : case REG_EQUIV:
1995 12127484 : case REG_EQUAL:
1996 12127484 : df_uses_record (&collection_rec,
1997 : &XEXP (note, 0), DF_REF_REG_USE,
1998 : bb, insn_info, DF_REF_IN_NOTE);
1999 21779907 : default:
2000 21779907 : break;
2001 : }
2002 : }
2003 :
2004 : /* Find some place to put any new mw_hardregs. */
2005 16887807 : df_canonize_collection_rec (&collection_rec);
2006 16887807 : struct df_mw_hardreg **mw_ptr = &insn_info->mw_hardregs, *mw;
2007 16887807 : FOR_EACH_VEC_ELT (collection_rec.mw_vec, i, mw)
2008 : {
2009 0 : while (*mw_ptr && df_mw_compare (*mw_ptr, mw) < 0)
2010 0 : mw_ptr = &DF_MWS_NEXT (*mw_ptr);
2011 0 : DF_MWS_NEXT (mw) = *mw_ptr;
2012 0 : *mw_ptr = mw;
2013 0 : mw_ptr = &DF_MWS_NEXT (mw);
2014 : }
2015 16887807 : df_refs_add_to_chains (&collection_rec, bb, insn, copy_eq_uses);
2016 16887807 : }
2017 : else
2018 0 : df_insn_rescan (insn);
2019 :
2020 : }
2021 :
2022 :
2023 : /*----------------------------------------------------------------------------
2024 : Hard core instruction scanning code. No external interfaces here,
2025 : just a lot of routines that look inside insns.
2026 : ----------------------------------------------------------------------------*/
2027 :
2028 :
2029 : /* Return true if the contents of two df_ref's are identical.
2030 : It ignores DF_REF_MARKER. */
2031 :
2032 : static bool
2033 8201652978 : df_ref_equal_p (df_ref ref1, df_ref ref2)
2034 : {
2035 8201652978 : if (!ref2)
2036 : return false;
2037 :
2038 8201652978 : if (ref1 == ref2)
2039 : return true;
2040 :
2041 8201652978 : if (DF_REF_CLASS (ref1) != DF_REF_CLASS (ref2)
2042 8110600990 : || DF_REF_REGNO (ref1) != DF_REF_REGNO (ref2)
2043 7602385450 : || DF_REF_REG (ref1) != DF_REF_REG (ref2)
2044 7601860545 : || DF_REF_TYPE (ref1) != DF_REF_TYPE (ref2)
2045 7596696647 : || ((DF_REF_FLAGS (ref1) & ~(DF_REF_REG_MARKER + DF_REF_MW_HARDREG))
2046 7596696647 : != (DF_REF_FLAGS (ref2) & ~(DF_REF_REG_MARKER + DF_REF_MW_HARDREG)))
2047 7594280479 : || DF_REF_BB (ref1) != DF_REF_BB (ref2)
2048 15795933457 : || DF_REF_INSN_INFO (ref1) != DF_REF_INSN_INFO (ref2))
2049 : return false;
2050 :
2051 7594280479 : switch (DF_REF_CLASS (ref1))
2052 : {
2053 : case DF_REF_ARTIFICIAL:
2054 : case DF_REF_BASE:
2055 : return true;
2056 :
2057 1426530272 : case DF_REF_REGULAR:
2058 1426530272 : return DF_REF_LOC (ref1) == DF_REF_LOC (ref2);
2059 :
2060 0 : default:
2061 0 : gcc_unreachable ();
2062 : }
2063 : }
2064 :
2065 :
2066 : /* Compare REF1 and REF2 for sorting. This is only called from places
2067 : where all of the refs are of the same type, in the same insn, and
2068 : have the same bb. So these fields are not checked. */
2069 :
2070 : static int
2071 11342875499 : df_ref_compare (df_ref ref1, df_ref ref2)
2072 : {
2073 11342875499 : if (DF_REF_CLASS (ref1) != DF_REF_CLASS (ref2))
2074 760073377 : return (int)DF_REF_CLASS (ref1) - (int)DF_REF_CLASS (ref2);
2075 :
2076 10582802122 : if (DF_REF_REGNO (ref1) != DF_REF_REGNO (ref2))
2077 10516649045 : return (int)DF_REF_REGNO (ref1) - (int)DF_REF_REGNO (ref2);
2078 :
2079 66153077 : if (DF_REF_TYPE (ref1) != DF_REF_TYPE (ref2))
2080 14300741 : return (int)DF_REF_TYPE (ref1) - (int)DF_REF_TYPE (ref2);
2081 :
2082 51852336 : if (DF_REF_REG (ref1) != DF_REF_REG (ref2))
2083 523524 : return (int)DF_REF_ORDER (ref1) - (int)DF_REF_ORDER (ref2);
2084 :
2085 : /* Cannot look at the LOC field on artificial refs. */
2086 51328812 : if (DF_REF_CLASS (ref1) != DF_REF_ARTIFICIAL
2087 51328812 : && DF_REF_LOC (ref1) != DF_REF_LOC (ref2))
2088 39278699 : return (int)DF_REF_ORDER (ref1) - (int)DF_REF_ORDER (ref2);
2089 :
2090 12050113 : if (DF_REF_FLAGS (ref1) != DF_REF_FLAGS (ref2))
2091 : {
2092 : /* If two refs are identical except that one of them has is from
2093 : a mw and one is not, we need to have the one with the mw
2094 : first. */
2095 9380814 : if (DF_REF_FLAGS_IS_SET (ref1, DF_REF_MW_HARDREG) ==
2096 9380814 : DF_REF_FLAGS_IS_SET (ref2, DF_REF_MW_HARDREG))
2097 9380814 : return DF_REF_FLAGS (ref1) - DF_REF_FLAGS (ref2);
2098 0 : else if (DF_REF_FLAGS_IS_SET (ref1, DF_REF_MW_HARDREG))
2099 : return -1;
2100 : else
2101 0 : return 1;
2102 : }
2103 :
2104 2669299 : return (int)DF_REF_ORDER (ref1) - (int)DF_REF_ORDER (ref2);
2105 : }
2106 :
2107 : /* Like df_ref_compare, but compare two df_ref* pointers R1 and R2. */
2108 :
2109 : static int
2110 3696833888 : df_ref_ptr_compare (const void *r1, const void *r2)
2111 : {
2112 3696833888 : return df_ref_compare (*(const df_ref *) r1, *(const df_ref *) r2);
2113 : }
2114 :
2115 : /* Sort and compress a set of refs. */
2116 :
2117 : static void
2118 4689888837 : df_sort_and_compress_refs (vec<df_ref, va_heap> *ref_vec)
2119 : {
2120 4689888837 : unsigned int count;
2121 4689888837 : unsigned int i;
2122 4689888837 : unsigned int dist = 0;
2123 :
2124 4689888837 : count = ref_vec->length ();
2125 :
2126 : /* If there are 1 or 0 elements, there is nothing to do. */
2127 4689888113 : if (count < 2)
2128 : return;
2129 567210183 : else if (count == 2)
2130 : {
2131 347181869 : df_ref r0 = (*ref_vec)[0];
2132 347181869 : df_ref r1 = (*ref_vec)[1];
2133 347181869 : if (df_ref_compare (r0, r1) > 0)
2134 158931661 : std::swap ((*ref_vec)[0], (*ref_vec)[1]);
2135 : }
2136 : else
2137 : {
2138 7433041601 : for (i = 0; i < count - 1; i++)
2139 : {
2140 7267799153 : df_ref r0 = (*ref_vec)[i];
2141 7267799153 : df_ref r1 = (*ref_vec)[i + 1];
2142 7267799153 : if (df_ref_compare (r0, r1) >= 0)
2143 : break;
2144 : }
2145 : /* If the array is already strictly ordered,
2146 : which is the most common case for large COUNT case
2147 : (which happens for CALL INSNs),
2148 : no need to sort and filter out duplicate.
2149 : Simply return the count.
2150 : Make sure DF_GET_ADD_REFS adds refs in the increasing order
2151 : of DF_REF_COMPARE. */
2152 220028314 : if (i == count - 1)
2153 : return;
2154 54785866 : ref_vec->qsort (df_ref_ptr_compare);
2155 : }
2156 :
2157 1388343596 : for (i=0; i<count-dist; i++)
2158 : {
2159 : /* Find the next ref that is not equal to the current ref. */
2160 986757797 : while (i + dist + 1 < count
2161 1571547859 : && df_ref_equal_p ((*ref_vec)[i],
2162 584790062 : (*ref_vec)[i + dist + 1]))
2163 : {
2164 381936 : df_free_ref ((*ref_vec)[i + dist + 1]);
2165 381936 : dist++;
2166 : }
2167 : /* Copy it down to the next position. */
2168 986375861 : if (dist && i + dist + 1 < count)
2169 94972 : (*ref_vec)[i + 1] = (*ref_vec)[i + dist + 1];
2170 : }
2171 :
2172 401967735 : count -= dist;
2173 401967735 : ref_vec->truncate (count);
2174 : }
2175 :
2176 :
2177 : /* Return true if the contents of two df_ref's are identical.
2178 : It ignores DF_REF_MARKER. */
2179 :
2180 : static bool
2181 6535224 : df_mw_equal_p (struct df_mw_hardreg *mw1, struct df_mw_hardreg *mw2)
2182 : {
2183 6535224 : if (!mw2)
2184 : return false;
2185 6535224 : return (mw1 == mw2) ||
2186 6535224 : (mw1->mw_reg == mw2->mw_reg
2187 6001079 : && mw1->type == mw2->type
2188 5751252 : && mw1->flags == mw2->flags
2189 5747960 : && mw1->start_regno == mw2->start_regno
2190 5747960 : && mw1->end_regno == mw2->end_regno);
2191 : }
2192 :
2193 :
2194 : /* Compare MW1 and MW2 for sorting. */
2195 :
2196 : static int
2197 1751821 : df_mw_compare (const df_mw_hardreg *mw1, const df_mw_hardreg *mw2)
2198 : {
2199 1751821 : if (mw1->type != mw2->type)
2200 1150712 : return mw1->type - mw2->type;
2201 :
2202 601109 : if (mw1->flags != mw2->flags)
2203 30288 : return mw1->flags - mw2->flags;
2204 :
2205 570821 : if (mw1->start_regno != mw2->start_regno)
2206 449524 : return mw1->start_regno - mw2->start_regno;
2207 :
2208 121297 : if (mw1->end_regno != mw2->end_regno)
2209 0 : return mw1->end_regno - mw2->end_regno;
2210 :
2211 121297 : return mw1->mw_order - mw2->mw_order;
2212 : }
2213 :
2214 : /* Like df_mw_compare, but compare two df_mw_hardreg** pointers R1 and R2. */
2215 :
2216 : static int
2217 1119379 : df_mw_ptr_compare (const void *m1, const void *m2)
2218 : {
2219 1119379 : return df_mw_compare (*(const df_mw_hardreg *const *) m1,
2220 1119379 : *(const df_mw_hardreg *const *) m2);
2221 : }
2222 :
2223 : /* Sort and compress a set of refs. */
2224 :
2225 : static void
2226 1563296279 : df_sort_and_compress_mws (vec<df_mw_hardreg *, va_heap> *mw_vec)
2227 : {
2228 1563296279 : unsigned int count;
2229 1563296279 : struct df_scan_problem_data *problem_data
2230 1563296279 : = (struct df_scan_problem_data *) df_scan->problem_data;
2231 1563296279 : unsigned int i;
2232 1563296279 : unsigned int dist = 0;
2233 :
2234 1563296279 : count = mw_vec->length ();
2235 1563296279 : if (count < 2)
2236 : return;
2237 708617 : else if (count == 2)
2238 : {
2239 632442 : struct df_mw_hardreg *m0 = (*mw_vec)[0];
2240 632442 : struct df_mw_hardreg *m1 = (*mw_vec)[1];
2241 632442 : if (df_mw_compare (m0, m1) > 0)
2242 : {
2243 135948 : struct df_mw_hardreg *tmp = (*mw_vec)[0];
2244 135948 : (*mw_vec)[0] = (*mw_vec)[1];
2245 135948 : (*mw_vec)[1] = tmp;
2246 : }
2247 : }
2248 : else
2249 76175 : mw_vec->qsort (df_mw_ptr_compare);
2250 :
2251 2202459 : for (i=0; i<count-dist; i++)
2252 : {
2253 : /* Find the next ref that is not equal to the current ref. */
2254 1518273 : while (i + dist + 1 < count
2255 1518273 : && df_mw_equal_p ((*mw_vec)[i], (*mw_vec)[i + dist + 1]))
2256 : {
2257 24431 : problem_data->mw_reg_pool->remove ((*mw_vec)[i + dist + 1]);
2258 24431 : dist++;
2259 : }
2260 : /* Copy it down to the next position. */
2261 1493842 : if (dist && i + dist + 1 < count)
2262 4468 : (*mw_vec)[i + 1] = (*mw_vec)[i + dist + 1];
2263 : }
2264 :
2265 708617 : count -= dist;
2266 708617 : mw_vec->truncate (count);
2267 : }
2268 :
2269 :
2270 : /* Sort and remove duplicates from the COLLECTION_REC. */
2271 :
2272 : static void
2273 1563296279 : df_canonize_collection_rec (class df_collection_rec *collection_rec)
2274 : {
2275 1563296279 : df_sort_and_compress_refs (&collection_rec->def_vec);
2276 1563296279 : df_sort_and_compress_refs (&collection_rec->use_vec);
2277 1563296279 : df_sort_and_compress_refs (&collection_rec->eq_use_vec);
2278 1563296279 : df_sort_and_compress_mws (&collection_rec->mw_vec);
2279 1563296279 : }
2280 :
2281 :
2282 : /* Add the new df_ref to appropriate reg_info/ref_info chains. */
2283 :
2284 : static void
2285 1876711938 : df_install_ref (df_ref this_ref,
2286 : struct df_reg_info *reg_info,
2287 : struct df_ref_info *ref_info,
2288 : bool add_to_table)
2289 : {
2290 1876711938 : unsigned int regno = DF_REF_REGNO (this_ref);
2291 : /* Add the ref to the reg_{def,use,eq_use} chain. */
2292 1876711938 : df_ref head = reg_info->reg_chain;
2293 :
2294 1876711938 : reg_info->reg_chain = this_ref;
2295 1876711938 : reg_info->n_refs++;
2296 :
2297 1876711938 : if (DF_REF_FLAGS_IS_SET (this_ref, DF_HARD_REG_LIVE))
2298 : {
2299 355340110 : gcc_assert (regno < FIRST_PSEUDO_REGISTER);
2300 355340110 : df->hard_regs_live_count[regno]++;
2301 : }
2302 :
2303 1876711938 : gcc_checking_assert (DF_REF_NEXT_REG (this_ref) == NULL
2304 : && DF_REF_PREV_REG (this_ref) == NULL);
2305 :
2306 1876711938 : DF_REF_NEXT_REG (this_ref) = head;
2307 :
2308 : /* We cannot actually link to the head of the chain. */
2309 1876711938 : DF_REF_PREV_REG (this_ref) = NULL;
2310 :
2311 1876711938 : if (head)
2312 1525205118 : DF_REF_PREV_REG (head) = this_ref;
2313 :
2314 1876711938 : if (add_to_table)
2315 : {
2316 1095048 : gcc_assert (ref_info->ref_order != DF_REF_ORDER_NO_TABLE);
2317 1095048 : df_check_and_grow_ref_info (ref_info, 1);
2318 1095048 : DF_REF_ID (this_ref) = ref_info->table_size;
2319 : /* Add the ref to the big array of defs. */
2320 1095048 : ref_info->refs[ref_info->table_size] = this_ref;
2321 1095048 : ref_info->table_size++;
2322 : }
2323 : else
2324 1875616890 : DF_REF_ID (this_ref) = -1;
2325 :
2326 1876711938 : ref_info->total_size++;
2327 1876711938 : }
2328 :
2329 :
2330 : /* This function takes one of the groups of refs (defs, uses or
2331 : eq_uses) and installs the entire group into the insn. It also adds
2332 : each of these refs into the appropriate chains. */
2333 :
2334 : static df_ref
2335 1282021802 : df_install_refs (basic_block bb,
2336 : const vec<df_ref, va_heap> *old_vec,
2337 : struct df_reg_info **reg_info,
2338 : struct df_ref_info *ref_info,
2339 : bool is_notes)
2340 : {
2341 1282021802 : unsigned int count = old_vec->length ();
2342 1282021802 : if (count)
2343 : {
2344 515382946 : bool add_to_table;
2345 515382946 : df_ref this_ref;
2346 515382946 : unsigned int ix;
2347 :
2348 515382946 : switch (ref_info->ref_order)
2349 : {
2350 0 : case DF_REF_ORDER_UNORDERED_WITH_NOTES:
2351 0 : case DF_REF_ORDER_BY_REG_WITH_NOTES:
2352 0 : case DF_REF_ORDER_BY_INSN_WITH_NOTES:
2353 0 : ref_info->ref_order = DF_REF_ORDER_UNORDERED_WITH_NOTES;
2354 0 : add_to_table = true;
2355 0 : break;
2356 1881951 : case DF_REF_ORDER_UNORDERED:
2357 1881951 : case DF_REF_ORDER_BY_REG:
2358 1881951 : case DF_REF_ORDER_BY_INSN:
2359 1881951 : ref_info->ref_order = DF_REF_ORDER_UNORDERED;
2360 1881951 : add_to_table = !is_notes;
2361 1881951 : break;
2362 : default:
2363 : add_to_table = false;
2364 : break;
2365 : }
2366 :
2367 : /* Do not add if ref is not in the right blocks. */
2368 1881951 : if (add_to_table && df->analyze_subset)
2369 1323204 : add_to_table = bitmap_bit_p (df->blocks_to_analyze, bb->index);
2370 :
2371 2392094884 : FOR_EACH_VEC_ELT (*old_vec, ix, this_ref)
2372 : {
2373 1876711938 : DF_REF_NEXT_LOC (this_ref) = (ix + 1 < old_vec->length ()
2374 1876711938 : ? (*old_vec)[ix + 1]
2375 : : NULL);
2376 1876711938 : df_install_ref (this_ref, reg_info[DF_REF_REGNO (this_ref)],
2377 : ref_info, add_to_table);
2378 : }
2379 515382946 : return (*old_vec)[0];
2380 : }
2381 : else
2382 : return 0;
2383 : }
2384 :
2385 :
2386 : /* This function takes the mws installs the entire group into the
2387 : insn. */
2388 :
2389 : static struct df_mw_hardreg *
2390 389359623 : df_install_mws (const vec<df_mw_hardreg *, va_heap> *old_vec)
2391 : {
2392 389359623 : unsigned int count = old_vec->length ();
2393 389359623 : if (count)
2394 : {
2395 3210016 : for (unsigned int i = 0; i < count - 1; i++)
2396 292949 : DF_MWS_NEXT ((*old_vec)[i]) = (*old_vec)[i + 1];
2397 2917067 : DF_MWS_NEXT ((*old_vec)[count - 1]) = 0;
2398 2917067 : return (*old_vec)[0];
2399 : }
2400 : else
2401 : return 0;
2402 : }
2403 :
2404 :
2405 : /* Add a chain of df_refs to appropriate ref chain/reg_info/ref_info
2406 : chains and update other necessary information. */
2407 :
2408 : static void
2409 454774993 : df_refs_add_to_chains (class df_collection_rec *collection_rec,
2410 : basic_block bb, rtx_insn *insn, unsigned int flags)
2411 : {
2412 454774993 : if (insn)
2413 : {
2414 406247430 : struct df_insn_info *insn_rec = DF_INSN_INFO_GET (insn);
2415 : /* If there is a vector in the collection rec, add it to the
2416 : insn. A null rec is a signal that the caller will handle the
2417 : chain specially. */
2418 406247430 : if (flags & copy_defs)
2419 : {
2420 389359623 : gcc_checking_assert (!insn_rec->defs);
2421 389359623 : insn_rec->defs
2422 389359623 : = df_install_refs (bb, &collection_rec->def_vec,
2423 : df->def_regs,
2424 : &df->def_info, false);
2425 : }
2426 406247430 : if (flags & copy_uses)
2427 : {
2428 389359623 : gcc_checking_assert (!insn_rec->uses);
2429 389359623 : insn_rec->uses
2430 389359623 : = df_install_refs (bb, &collection_rec->use_vec,
2431 : df->use_regs,
2432 389359623 : &df->use_info, false);
2433 : }
2434 406247430 : if (flags & copy_eq_uses)
2435 : {
2436 406247430 : gcc_checking_assert (!insn_rec->eq_uses);
2437 406247430 : insn_rec->eq_uses
2438 406247430 : = df_install_refs (bb, &collection_rec->eq_use_vec,
2439 : df->eq_use_regs,
2440 406247430 : &df->use_info, true);
2441 : }
2442 406247430 : if (flags & copy_mw)
2443 : {
2444 389359623 : gcc_checking_assert (!insn_rec->mw_hardregs);
2445 389359623 : insn_rec->mw_hardregs
2446 389359623 : = df_install_mws (&collection_rec->mw_vec);
2447 : }
2448 : }
2449 : else
2450 : {
2451 48527563 : struct df_scan_bb_info *bb_info = df_scan_get_bb_info (bb->index);
2452 :
2453 48527563 : gcc_checking_assert (!bb_info->artificial_defs);
2454 48527563 : bb_info->artificial_defs
2455 48527563 : = df_install_refs (bb, &collection_rec->def_vec,
2456 : df->def_regs,
2457 : &df->def_info, false);
2458 48527563 : gcc_checking_assert (!bb_info->artificial_uses);
2459 48527563 : bb_info->artificial_uses
2460 48527563 : = df_install_refs (bb, &collection_rec->use_vec,
2461 : df->use_regs,
2462 48527563 : &df->use_info, false);
2463 : }
2464 454774993 : }
2465 :
2466 :
2467 : /* Allocate a ref and initialize its fields. */
2468 :
2469 : static df_ref
2470 9382914836 : df_ref_create_structure (enum df_ref_class cl,
2471 : class df_collection_rec *collection_rec,
2472 : rtx reg, rtx *loc,
2473 : basic_block bb, struct df_insn_info *info,
2474 : enum df_ref_type ref_type,
2475 : int ref_flags)
2476 : {
2477 9382914836 : const unsigned int regno
2478 9382914836 : = REGNO (GET_CODE (reg) == SUBREG ? SUBREG_REG (reg) : reg);
2479 9382914836 : struct df_scan_problem_data *problem_data
2480 9382914836 : = (struct df_scan_problem_data *) df_scan->problem_data;
2481 9382914836 : df_ref this_ref;
2482 :
2483 9382914836 : switch (cl)
2484 : {
2485 6930833843 : case DF_REF_BASE:
2486 6930833843 : this_ref = (df_ref) (problem_data->ref_base_pool->allocate ());
2487 6930833843 : gcc_checking_assert (loc == NULL);
2488 : break;
2489 :
2490 512309640 : case DF_REF_ARTIFICIAL:
2491 512309640 : this_ref = (df_ref) (problem_data->ref_artificial_pool->allocate ());
2492 512309640 : this_ref->artificial_ref.bb = bb;
2493 512309640 : gcc_checking_assert (loc == NULL);
2494 : break;
2495 :
2496 1939771353 : case DF_REF_REGULAR:
2497 1939771353 : this_ref = (df_ref) (problem_data->ref_regular_pool->allocate ());
2498 1939771353 : this_ref->regular_ref.loc = loc;
2499 1939771353 : gcc_checking_assert (loc);
2500 : break;
2501 :
2502 0 : default:
2503 0 : gcc_unreachable ();
2504 : }
2505 :
2506 9382914836 : DF_REF_CLASS (this_ref) = cl;
2507 9382914836 : DF_REF_ID (this_ref) = -1;
2508 9382914836 : DF_REF_REG (this_ref) = reg;
2509 9382914836 : DF_REF_REGNO (this_ref) = regno;
2510 9382914836 : DF_REF_TYPE (this_ref) = ref_type;
2511 9382914836 : DF_REF_INSN_INFO (this_ref) = info;
2512 9382914836 : DF_REF_CHAIN (this_ref) = NULL;
2513 9382914836 : DF_REF_FLAGS (this_ref) = ref_flags;
2514 9382914836 : DF_REF_NEXT_REG (this_ref) = NULL;
2515 9382914836 : DF_REF_PREV_REG (this_ref) = NULL;
2516 9382914836 : DF_REF_ORDER (this_ref) = df->ref_order++;
2517 :
2518 : /* We need to clear the DF_HARD_REG_LIVE bit because fwprop, and in the
2519 : future possibly other optimizations, sometimes create new refs using
2520 : live refs as the model. */
2521 9382914836 : DF_REF_FLAGS_CLEAR (this_ref, DF_HARD_REG_LIVE);
2522 :
2523 : /* Now see if this ref really needs to have the bit set. */
2524 9382914836 : if (regno < FIRST_PSEUDO_REGISTER
2525 9382914836 : && cl != DF_REF_ARTIFICIAL
2526 8250031892 : && !DEBUG_INSN_P (info->insn))
2527 : {
2528 8183194009 : if (ref_type == DF_REF_REG_DEF)
2529 : {
2530 7344527861 : if (!DF_REF_FLAGS_IS_SET (this_ref, DF_REF_MAY_CLOBBER))
2531 522543721 : DF_REF_FLAGS_SET (this_ref, DF_HARD_REG_LIVE);
2532 : }
2533 838666148 : else if (!(TEST_HARD_REG_BIT (elim_reg_set, regno)
2534 86756197 : && (regno == FRAME_POINTER_REGNUM
2535 86756197 : || regno == ARG_POINTER_REGNUM)))
2536 751909951 : DF_REF_FLAGS_SET (this_ref, DF_HARD_REG_LIVE);
2537 : }
2538 :
2539 9382914836 : if (collection_rec)
2540 : {
2541 9382914836 : if (DF_REF_REG_DEF_P (this_ref))
2542 7758610799 : collection_rec->def_vec.safe_push (this_ref);
2543 1624304037 : else if (DF_REF_FLAGS (this_ref) & DF_REF_IN_NOTE)
2544 41373428 : collection_rec->eq_use_vec.safe_push (this_ref);
2545 : else
2546 1582930609 : collection_rec->use_vec.safe_push (this_ref);
2547 : }
2548 : else
2549 0 : df_install_ref_incremental (this_ref);
2550 :
2551 9382914836 : return this_ref;
2552 : }
2553 :
2554 :
2555 : /* Create new references of type DF_REF_TYPE for each part of register REG
2556 : at address LOC within INSN of BB. */
2557 :
2558 :
2559 : static void
2560 9373956860 : df_ref_record (enum df_ref_class cl,
2561 : class df_collection_rec *collection_rec,
2562 : rtx reg, rtx *loc,
2563 : basic_block bb, struct df_insn_info *insn_info,
2564 : enum df_ref_type ref_type,
2565 : int ref_flags)
2566 : {
2567 9373956860 : unsigned int regno;
2568 :
2569 9373956860 : gcc_checking_assert (REG_P (reg) || GET_CODE (reg) == SUBREG);
2570 :
2571 9373956860 : regno = REGNO (GET_CODE (reg) == SUBREG ? SUBREG_REG (reg) : reg);
2572 9373956860 : if (regno < FIRST_PSEUDO_REGISTER)
2573 : {
2574 8753383556 : struct df_mw_hardreg *hardreg = NULL;
2575 8753383556 : struct df_scan_problem_data *problem_data
2576 8753383556 : = (struct df_scan_problem_data *) df_scan->problem_data;
2577 8753383556 : unsigned int i;
2578 8753383556 : unsigned int endregno;
2579 8753383556 : df_ref ref;
2580 :
2581 8753383556 : if (GET_CODE (reg) == SUBREG)
2582 : {
2583 345194 : int off = subreg_regno_offset (regno, GET_MODE (SUBREG_REG (reg)),
2584 172597 : SUBREG_BYTE (reg), GET_MODE (reg));
2585 172597 : unsigned int nregno = regno + off;
2586 172597 : endregno = nregno + subreg_nregs (reg);
2587 172597 : if (off < 0 && regno < (unsigned) -off)
2588 : /* Deal with paradoxical SUBREGs on big endian where
2589 : in debug insns the hard reg number might be smaller
2590 : than -off, such as (subreg:DI (reg:SI 0 [+4 ]) 0));
2591 : RA decisions shouldn't be affected by debug insns
2592 : and so RA can decide to put pseudo into a hard reg
2593 : with small REGNO, even when it is referenced in
2594 : a paradoxical SUBREG in a debug insn. */
2595 : regno = 0;
2596 : else
2597 172597 : regno = nregno;
2598 : }
2599 : else
2600 8753210959 : endregno = END_REGNO (reg);
2601 :
2602 : /* If this is a multiword hardreg, we create some extra
2603 : datastructures that will enable us to easily build REG_DEAD
2604 : and REG_UNUSED notes. */
2605 8753383556 : if (collection_rec
2606 8753383556 : && (endregno != regno + 1) && insn_info)
2607 : {
2608 : /* Sets to a subreg of a multiword register are partial.
2609 : Sets to a non-subreg of a multiword register are not. */
2610 8957976 : if (GET_CODE (reg) == SUBREG)
2611 0 : ref_flags |= DF_REF_PARTIAL;
2612 8957976 : ref_flags |= DF_REF_MW_HARDREG;
2613 :
2614 8957976 : gcc_assert (regno < endregno);
2615 :
2616 8957976 : hardreg = problem_data->mw_reg_pool->allocate ();
2617 8957976 : hardreg->type = ref_type;
2618 8957976 : hardreg->flags = ref_flags;
2619 8957976 : hardreg->mw_reg = reg;
2620 8957976 : hardreg->start_regno = regno;
2621 8957976 : hardreg->end_regno = endregno - 1;
2622 8957976 : hardreg->mw_order = df->ref_order++;
2623 8957976 : collection_rec->mw_vec.safe_push (hardreg);
2624 : }
2625 :
2626 17515725088 : for (i = regno; i < endregno; i++)
2627 : {
2628 8762341532 : ref = df_ref_create_structure (cl, collection_rec, regno_reg_rtx[i], loc,
2629 : bb, insn_info, ref_type, ref_flags);
2630 :
2631 8762341532 : gcc_assert (ORIGINAL_REGNO (DF_REF_REG (ref)) == i);
2632 : }
2633 : }
2634 : else
2635 : {
2636 620573304 : df_ref_create_structure (cl, collection_rec, reg, loc, bb, insn_info,
2637 : ref_type, ref_flags);
2638 : }
2639 9373956860 : }
2640 :
2641 :
2642 : /* Process all the registers defined in the rtx pointed by LOC.
2643 : Autoincrement/decrement definitions will be picked up by df_uses_record.
2644 : Any change here has to be matched in df_find_hard_reg_defs_1. */
2645 :
2646 : static void
2647 954656583 : df_def_record_1 (class df_collection_rec *collection_rec,
2648 : rtx *loc, basic_block bb, struct df_insn_info *insn_info,
2649 : int flags)
2650 : {
2651 954656583 : rtx dst = *loc;
2652 :
2653 : /* It is legal to have a set destination be a parallel. */
2654 954656583 : if (GET_CODE (dst) == PARALLEL)
2655 : {
2656 159119 : int i;
2657 426550 : for (i = XVECLEN (dst, 0) - 1; i >= 0; i--)
2658 : {
2659 267431 : rtx temp = XVECEXP (dst, 0, i);
2660 267431 : gcc_assert (GET_CODE (temp) == EXPR_LIST);
2661 267431 : df_def_record_1 (collection_rec, &XEXP (temp, 0),
2662 : bb, insn_info, flags);
2663 : }
2664 : return;
2665 : }
2666 :
2667 954497464 : if (GET_CODE (dst) == STRICT_LOW_PART)
2668 : {
2669 125967 : flags |= DF_REF_READ_WRITE | DF_REF_PARTIAL | DF_REF_STRICT_LOW_PART;
2670 :
2671 125967 : loc = &XEXP (dst, 0);
2672 125967 : dst = *loc;
2673 : }
2674 :
2675 954497464 : if (GET_CODE (dst) == ZERO_EXTRACT)
2676 : {
2677 70275 : flags |= DF_REF_READ_WRITE | DF_REF_PARTIAL | DF_REF_ZERO_EXTRACT;
2678 :
2679 70275 : loc = &XEXP (dst, 0);
2680 70275 : dst = *loc;
2681 : }
2682 :
2683 : /* At this point if we do not have a reg or a subreg, just return. */
2684 954497464 : if (REG_P (dst))
2685 : {
2686 707028172 : df_ref_record (DF_REF_REGULAR, collection_rec,
2687 : dst, loc, bb, insn_info, DF_REF_REG_DEF, flags);
2688 :
2689 : /* We want to keep sp alive everywhere - by making all
2690 : writes to sp also use of sp. */
2691 707028172 : if (REGNO (dst) == STACK_POINTER_REGNUM)
2692 24855129 : df_ref_record (DF_REF_BASE, collection_rec,
2693 : dst, NULL, bb, insn_info, DF_REF_REG_USE, flags);
2694 : }
2695 247469292 : else if (GET_CODE (dst) == SUBREG && REG_P (SUBREG_REG (dst)))
2696 : {
2697 3144971 : if (read_modify_subreg_p (dst))
2698 1793134 : flags |= DF_REF_READ_WRITE | DF_REF_PARTIAL;
2699 :
2700 3144971 : flags |= DF_REF_SUBREG;
2701 :
2702 3144971 : df_ref_record (DF_REF_REGULAR, collection_rec,
2703 : dst, loc, bb, insn_info, DF_REF_REG_DEF, flags);
2704 : }
2705 : }
2706 :
2707 :
2708 : /* Process all the registers defined in the pattern rtx, X. Any change
2709 : here has to be matched in df_find_hard_reg_defs. */
2710 :
2711 : static void
2712 1660209530 : df_defs_record (class df_collection_rec *collection_rec,
2713 : rtx x, basic_block bb, struct df_insn_info *insn_info,
2714 : int flags)
2715 : {
2716 1660209530 : RTX_CODE code = GET_CODE (x);
2717 1660209530 : int i;
2718 :
2719 1660209530 : switch (code)
2720 : {
2721 830571463 : case SET:
2722 830571463 : df_def_record_1 (collection_rec, &SET_DEST (x), bb, insn_info, flags);
2723 830571463 : break;
2724 :
2725 123817689 : case CLOBBER:
2726 123817689 : flags |= DF_REF_MUST_CLOBBER;
2727 123817689 : df_def_record_1 (collection_rec, &XEXP (x, 0), bb, insn_info, flags);
2728 123817689 : break;
2729 :
2730 0 : case COND_EXEC:
2731 0 : df_defs_record (collection_rec, COND_EXEC_CODE (x),
2732 : bb, insn_info, DF_REF_CONDITIONAL);
2733 0 : break;
2734 :
2735 : case PARALLEL:
2736 351126718 : for (i = 0; i < XVECLEN (x, 0); i++)
2737 236969423 : df_defs_record (collection_rec, XVECEXP (x, 0, i),
2738 : bb, insn_info, flags);
2739 : break;
2740 : default:
2741 : /* No DEFs to record in other cases */
2742 : break;
2743 : }
2744 1660209530 : }
2745 :
2746 : /* Set bits in *DEFS for hard registers found in the rtx DST, which is the
2747 : destination of a set or clobber. This has to match the logic in
2748 : df_defs_record_1. */
2749 :
2750 : static void
2751 37119656 : df_find_hard_reg_defs_1 (rtx dst, HARD_REG_SET *defs)
2752 : {
2753 : /* It is legal to have a set destination be a parallel. */
2754 37119656 : if (GET_CODE (dst) == PARALLEL)
2755 : {
2756 159119 : int i;
2757 426550 : for (i = XVECLEN (dst, 0) - 1; i >= 0; i--)
2758 : {
2759 267431 : rtx temp = XVECEXP (dst, 0, i);
2760 267431 : gcc_assert (GET_CODE (temp) == EXPR_LIST);
2761 267431 : df_find_hard_reg_defs_1 (XEXP (temp, 0), defs);
2762 : }
2763 : return;
2764 : }
2765 :
2766 36960537 : if (GET_CODE (dst) == STRICT_LOW_PART)
2767 0 : dst = XEXP (dst, 0);
2768 :
2769 36960537 : if (GET_CODE (dst) == ZERO_EXTRACT)
2770 0 : dst = XEXP (dst, 0);
2771 :
2772 : /* At this point if we do not have a reg or a subreg, just return. */
2773 36960537 : if (REG_P (dst) && HARD_REGISTER_P (dst))
2774 36960537 : SET_HARD_REG_BIT (*defs, REGNO (dst));
2775 0 : else if (GET_CODE (dst) == SUBREG
2776 0 : && REG_P (SUBREG_REG (dst)) && HARD_REGISTER_P (dst))
2777 0 : SET_HARD_REG_BIT (*defs, REGNO (SUBREG_REG (dst)));
2778 : }
2779 :
2780 : /* Set bits in *DEFS for hard registers defined in the pattern X. This
2781 : has to match the logic in df_defs_record. */
2782 :
2783 : static void
2784 88979254 : df_find_hard_reg_defs (rtx x, HARD_REG_SET *defs)
2785 : {
2786 88979254 : RTX_CODE code = GET_CODE (x);
2787 88979254 : int i;
2788 :
2789 88979254 : switch (code)
2790 : {
2791 36814010 : case SET:
2792 36814010 : df_find_hard_reg_defs_1 (SET_DEST (x), defs);
2793 36814010 : break;
2794 :
2795 38215 : case CLOBBER:
2796 38215 : df_find_hard_reg_defs_1 (XEXP (x, 0), defs);
2797 38215 : break;
2798 :
2799 0 : case COND_EXEC:
2800 0 : df_find_hard_reg_defs (COND_EXEC_CODE (x), defs);
2801 0 : break;
2802 :
2803 : case PARALLEL:
2804 7235092 : for (i = 0; i < XVECLEN (x, 0); i++)
2805 4836133 : df_find_hard_reg_defs (XVECEXP (x, 0, i), defs);
2806 : break;
2807 : default:
2808 : /* No DEFs to record in other cases */
2809 : break;
2810 : }
2811 88979254 : }
2812 :
2813 :
2814 : /* Process all the registers used in the rtx at address LOC. */
2815 :
2816 : static void
2817 3627595717 : df_uses_record (class df_collection_rec *collection_rec,
2818 : rtx *loc, enum df_ref_type ref_type,
2819 : basic_block bb, struct df_insn_info *insn_info,
2820 : int flags)
2821 : {
2822 5335680044 : RTX_CODE code;
2823 5335680044 : rtx x;
2824 :
2825 5335680044 : retry:
2826 5335680044 : x = *loc;
2827 5335680044 : if (!x)
2828 : return;
2829 5335680044 : code = GET_CODE (x);
2830 5335680044 : switch (code)
2831 : {
2832 : case LABEL_REF:
2833 : case SYMBOL_REF:
2834 : case CONST:
2835 : CASE_CONST_ANY:
2836 : case PC:
2837 : case ADDR_VEC:
2838 : case ADDR_DIFF_VEC:
2839 : return;
2840 :
2841 309240790 : case CLOBBER:
2842 : /* If we are clobbering a MEM, mark any registers inside the address
2843 : as being used. */
2844 309240790 : if (MEM_P (XEXP (x, 0)))
2845 3885591 : df_uses_record (collection_rec,
2846 : &XEXP (XEXP (x, 0), 0),
2847 : DF_REF_REG_MEM_STORE,
2848 : bb, insn_info,
2849 : flags);
2850 :
2851 : /* If we're clobbering a REG then we have a def so ignore. */
2852 : return;
2853 :
2854 284421225 : case MEM:
2855 284421225 : df_uses_record (collection_rec,
2856 : &XEXP (x, 0), DF_REF_REG_MEM_LOAD,
2857 : bb, insn_info, flags & DF_REF_IN_NOTE);
2858 284421225 : return;
2859 :
2860 14393356 : case SUBREG:
2861 : /* While we're here, optimize this case. */
2862 14393356 : flags |= DF_REF_PARTIAL;
2863 : /* In case the SUBREG is not of a REG, do not optimize. */
2864 14393356 : if (!REG_P (SUBREG_REG (x)))
2865 : {
2866 829735 : loc = &SUBREG_REG (x);
2867 829735 : df_uses_record (collection_rec, loc, ref_type, bb, insn_info, flags);
2868 829735 : return;
2869 : }
2870 : /* Fall through */
2871 :
2872 1195703063 : case REG:
2873 1195703063 : df_ref_record (DF_REF_REGULAR, collection_rec,
2874 : x, loc, bb, insn_info,
2875 : ref_type, flags);
2876 1195703063 : return;
2877 :
2878 403426 : case SIGN_EXTRACT:
2879 403426 : case ZERO_EXTRACT:
2880 403426 : {
2881 403426 : df_uses_record (collection_rec,
2882 : &XEXP (x, 1), ref_type, bb, insn_info, flags);
2883 403426 : df_uses_record (collection_rec,
2884 : &XEXP (x, 2), ref_type, bb, insn_info, flags);
2885 :
2886 : /* If the parameters to the zero or sign extract are
2887 : constants, strip them off and recurse, otherwise there is
2888 : no information that we can gain from this operation. */
2889 403426 : if (code == ZERO_EXTRACT)
2890 370952 : flags |= DF_REF_ZERO_EXTRACT;
2891 : else
2892 32474 : flags |= DF_REF_SIGN_EXTRACT;
2893 :
2894 403426 : df_uses_record (collection_rec,
2895 : &XEXP (x, 0), ref_type, bb, insn_info, flags);
2896 403426 : return;
2897 : }
2898 830571463 : break;
2899 :
2900 830571463 : case SET:
2901 830571463 : {
2902 830571463 : rtx dst = SET_DEST (x);
2903 830571463 : gcc_assert (!(flags & DF_REF_IN_NOTE));
2904 830571463 : df_uses_record (collection_rec,
2905 : &SET_SRC (x), DF_REF_REG_USE, bb, insn_info, flags);
2906 :
2907 830571463 : switch (GET_CODE (dst))
2908 : {
2909 3102017 : case SUBREG:
2910 3102017 : if (read_modify_subreg_p (dst))
2911 : {
2912 1781405 : df_uses_record (collection_rec, &SUBREG_REG (dst),
2913 : DF_REF_REG_USE, bb, insn_info,
2914 : flags | DF_REF_READ_WRITE | DF_REF_SUBREG);
2915 1781405 : break;
2916 : }
2917 : /* Fall through. */
2918 : case REG:
2919 : case PARALLEL:
2920 : case SCRATCH:
2921 : case PC:
2922 : break;
2923 136206151 : case MEM:
2924 136206151 : df_uses_record (collection_rec, &XEXP (dst, 0),
2925 : DF_REF_REG_MEM_STORE, bb, insn_info, flags);
2926 136206151 : break;
2927 125967 : case STRICT_LOW_PART:
2928 125967 : {
2929 125967 : rtx *temp = &XEXP (dst, 0);
2930 : /* A strict_low_part uses the whole REG and not just the
2931 : SUBREG. */
2932 125967 : dst = XEXP (dst, 0);
2933 38884 : df_uses_record (collection_rec,
2934 125967 : (GET_CODE (dst) == SUBREG) ? &SUBREG_REG (dst) : temp,
2935 : DF_REF_REG_USE, bb, insn_info,
2936 : DF_REF_READ_WRITE | DF_REF_STRICT_LOW_PART);
2937 : }
2938 125967 : break;
2939 70275 : case ZERO_EXTRACT:
2940 70275 : {
2941 70275 : df_uses_record (collection_rec, &XEXP (dst, 1),
2942 : DF_REF_REG_USE, bb, insn_info, flags);
2943 70275 : df_uses_record (collection_rec, &XEXP (dst, 2),
2944 : DF_REF_REG_USE, bb, insn_info, flags);
2945 70275 : if (GET_CODE (XEXP (dst,0)) == MEM)
2946 6414 : df_uses_record (collection_rec, &XEXP (dst, 0),
2947 : DF_REF_REG_USE, bb, insn_info,
2948 : flags);
2949 : else
2950 63861 : df_uses_record (collection_rec, &XEXP (dst, 0),
2951 : DF_REF_REG_USE, bb, insn_info,
2952 : DF_REF_READ_WRITE | DF_REF_ZERO_EXTRACT);
2953 : }
2954 : break;
2955 :
2956 0 : default:
2957 0 : gcc_unreachable ();
2958 : }
2959 : return;
2960 : }
2961 :
2962 : case RETURN:
2963 : case SIMPLE_RETURN:
2964 : break;
2965 :
2966 6609011 : case ASM_OPERANDS:
2967 6609011 : case UNSPEC_VOLATILE:
2968 6609011 : case TRAP_IF:
2969 6609011 : case ASM_INPUT:
2970 6609011 : {
2971 : /* Traditional and volatile asm instructions must be
2972 : considered to use and clobber all hard registers, all
2973 : pseudo-registers and all of memory. So must TRAP_IF and
2974 : UNSPEC_VOLATILE operations.
2975 :
2976 : Consider for instance a volatile asm that changes the fpu
2977 : rounding mode. An insn should not be moved across this
2978 : even if it only uses pseudo-regs because it might give an
2979 : incorrectly rounded result.
2980 :
2981 : However, flow.c's liveness computation did *not* do this,
2982 : giving the reasoning as " ?!? Unfortunately, marking all
2983 : hard registers as live causes massive problems for the
2984 : register allocator and marking all pseudos as live creates
2985 : mountains of uninitialized variable warnings."
2986 :
2987 : In order to maintain the status quo with regard to liveness
2988 : and uses, we do what flow.c did and just mark any regs we
2989 : can find in ASM_OPERANDS as used. In global asm insns are
2990 : scanned and regs_asm_clobbered is filled out.
2991 :
2992 : For all ASM_OPERANDS, we must traverse the vector of input
2993 : operands. We cannot just fall through here since then we
2994 : would be confused by the ASM_INPUT rtx inside ASM_OPERANDS,
2995 : which do not indicate traditional asms unlike their normal
2996 : usage. */
2997 6609011 : if (code == ASM_OPERANDS)
2998 : {
2999 : int j;
3000 :
3001 2532535 : for (j = 0; j < ASM_OPERANDS_INPUT_LENGTH (x); j++)
3002 1227707 : df_uses_record (collection_rec, &ASM_OPERANDS_INPUT (x, j),
3003 : DF_REF_REG_USE, bb, insn_info, flags);
3004 : return;
3005 : }
3006 : break;
3007 : }
3008 :
3009 433343459 : case VAR_LOCATION:
3010 433343459 : df_uses_record (collection_rec,
3011 : &PAT_VAR_LOCATION_LOC (x),
3012 : DF_REF_REG_USE, bb, insn_info, flags);
3013 433343459 : return;
3014 :
3015 24937171 : case PRE_DEC:
3016 24937171 : case POST_DEC:
3017 24937171 : case PRE_INC:
3018 24937171 : case POST_INC:
3019 24937171 : case PRE_MODIFY:
3020 24937171 : case POST_MODIFY:
3021 24937171 : gcc_assert (!DEBUG_INSN_P (insn_info->insn));
3022 : /* Catch the def of the register being modified. */
3023 24937171 : df_ref_record (DF_REF_REGULAR, collection_rec, XEXP (x, 0), &XEXP (x, 0),
3024 : bb, insn_info,
3025 : DF_REF_REG_DEF,
3026 : flags | DF_REF_READ_WRITE | DF_REF_PRE_POST_MODIFY);
3027 :
3028 : /* ... Fall through to handle uses ... */
3029 :
3030 : default:
3031 : break;
3032 : }
3033 :
3034 : /* Recursively scan the operands of this expression. */
3035 1173422777 : {
3036 1173422777 : const char *fmt = GET_RTX_FORMAT (code);
3037 1173422777 : int i;
3038 :
3039 2292611779 : for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
3040 : {
3041 1966206095 : if (fmt[i] == 'e')
3042 : {
3043 : /* Tail recursive case: save a function call level. */
3044 1731007568 : if (i == 0)
3045 : {
3046 847017093 : loc = &XEXP (x, 0);
3047 847017093 : goto retry;
3048 : }
3049 883990475 : df_uses_record (collection_rec, &XEXP (x, i), ref_type,
3050 : bb, insn_info, flags);
3051 : }
3052 235198527 : else if (fmt[i] == 'E')
3053 : {
3054 : int j;
3055 400438080 : for (j = 0; j < XVECLEN (x, i); j++)
3056 269080995 : df_uses_record (collection_rec,
3057 : &XVECEXP (x, i, j), ref_type,
3058 : bb, insn_info, flags);
3059 : }
3060 : }
3061 : }
3062 :
3063 : return;
3064 : }
3065 :
3066 :
3067 : /* For all DF_REF_CONDITIONAL defs, add a corresponding uses. */
3068 :
3069 : static void
3070 0 : df_get_conditional_uses (class df_collection_rec *collection_rec)
3071 : {
3072 0 : unsigned int ix;
3073 0 : df_ref ref;
3074 :
3075 0 : FOR_EACH_VEC_ELT (collection_rec->def_vec, ix, ref)
3076 : {
3077 0 : if (DF_REF_FLAGS_IS_SET (ref, DF_REF_CONDITIONAL))
3078 : {
3079 0 : df_ref use;
3080 :
3081 0 : use = df_ref_create_structure (DF_REF_CLASS (ref), collection_rec, DF_REF_REG (ref),
3082 0 : DF_REF_LOC (ref), DF_REF_BB (ref),
3083 : DF_REF_INSN_INFO (ref), DF_REF_REG_USE,
3084 : DF_REF_FLAGS (ref) & ~DF_REF_CONDITIONAL);
3085 0 : DF_REF_REGNO (use) = DF_REF_REGNO (ref);
3086 : }
3087 : }
3088 0 : }
3089 :
3090 :
3091 : /* Get call's extra defs and uses (track caller-saved registers). */
3092 :
3093 : static void
3094 84143121 : df_get_call_refs (class df_collection_rec *collection_rec,
3095 : basic_block bb,
3096 : struct df_insn_info *insn_info,
3097 : int flags)
3098 : {
3099 84143121 : rtx note;
3100 84143121 : bool is_sibling_call;
3101 84143121 : unsigned int i;
3102 84143121 : HARD_REG_SET defs_generated;
3103 :
3104 84143121 : CLEAR_HARD_REG_SET (defs_generated);
3105 84143121 : df_find_hard_reg_defs (PATTERN (insn_info->insn), &defs_generated);
3106 84143121 : is_sibling_call = SIBLING_CALL_P (insn_info->insn);
3107 84143121 : function_abi callee_abi = insn_callee_abi (insn_info->insn);
3108 :
3109 7825310253 : for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
3110 : {
3111 7741167132 : if (i == STACK_POINTER_REGNUM
3112 7741167132 : && !FAKE_CALL_P (insn_info->insn))
3113 : /* The stack ptr is used (honorarily) by a CALL insn. */
3114 83977971 : df_ref_record (DF_REF_BASE, collection_rec, regno_reg_rtx[i],
3115 : NULL, bb, insn_info, DF_REF_REG_USE,
3116 : DF_REF_CALL_STACK_USAGE | flags);
3117 7657189161 : else if (global_regs[i])
3118 : {
3119 : /* Calls to const functions cannot access any global registers and
3120 : calls to pure functions cannot set them. All other calls may
3121 : reference any of the global registers, so they are recorded as
3122 : used. */
3123 1296 : if (!RTL_CONST_CALL_P (insn_info->insn))
3124 : {
3125 1296 : df_ref_record (DF_REF_BASE, collection_rec, regno_reg_rtx[i],
3126 : NULL, bb, insn_info, DF_REF_REG_USE, flags);
3127 1296 : if (!RTL_PURE_CALL_P (insn_info->insn))
3128 1161 : df_ref_record (DF_REF_BASE, collection_rec, regno_reg_rtx[i],
3129 : NULL, bb, insn_info, DF_REF_REG_DEF, flags);
3130 : }
3131 : }
3132 7657187865 : else if (callee_abi.clobbers_full_reg_p (i)
3133 : /* no clobbers for regs that are the result of the call */
3134 6856750298 : && !TEST_HARD_REG_BIT (defs_generated, i)
3135 14479172005 : && (!is_sibling_call
3136 150784600 : || !bitmap_bit_p (df->exit_block_uses, i)
3137 11463 : || refers_to_regno_p (i, crtl->return_rtx)))
3138 6821984140 : df_ref_record (DF_REF_BASE, collection_rec, regno_reg_rtx[i],
3139 : NULL, bb, insn_info, DF_REF_REG_DEF,
3140 : DF_REF_MAY_CLOBBER | flags);
3141 : }
3142 :
3143 : /* Record the registers used to pass arguments, and explicitly
3144 : noted as clobbered. */
3145 262557470 : for (note = CALL_INSN_FUNCTION_USAGE (insn_info->insn); note;
3146 178414349 : note = XEXP (note, 1))
3147 : {
3148 178414349 : if (GET_CODE (XEXP (note, 0)) == USE)
3149 167593851 : df_uses_record (collection_rec, &XEXP (XEXP (note, 0), 0),
3150 : DF_REF_REG_USE, bb, insn_info, flags);
3151 10820498 : else if (GET_CODE (XEXP (note, 0)) == CLOBBER)
3152 : {
3153 9029068 : if (REG_P (XEXP (XEXP (note, 0), 0)))
3154 : {
3155 9029068 : unsigned int regno = REGNO (XEXP (XEXP (note, 0), 0));
3156 9029068 : if (!TEST_HARD_REG_BIT (defs_generated, regno))
3157 9028201 : df_defs_record (collection_rec, XEXP (note, 0), bb,
3158 : insn_info, flags);
3159 : }
3160 : else
3161 0 : df_uses_record (collection_rec, &XEXP (note, 0),
3162 : DF_REF_REG_USE, bb, insn_info, flags);
3163 : }
3164 : }
3165 :
3166 84143121 : return;
3167 : }
3168 :
3169 : /* Collect all refs in the INSN. This function is free of any
3170 : side-effect - it will create and return a lists of df_ref's in the
3171 : COLLECTION_REC without putting those refs into existing ref chains
3172 : and reg chains. */
3173 :
3174 : static void
3175 1414211906 : df_insn_refs_collect (class df_collection_rec *collection_rec,
3176 : basic_block bb, struct df_insn_info *insn_info)
3177 : {
3178 1414211906 : rtx note;
3179 1414211906 : bool is_cond_exec = (GET_CODE (PATTERN (insn_info->insn)) == COND_EXEC);
3180 :
3181 : /* Clear out the collection record. */
3182 1414211906 : collection_rec->def_vec.truncate (0);
3183 1414211906 : collection_rec->use_vec.truncate (0);
3184 1414211906 : collection_rec->eq_use_vec.truncate (0);
3185 1414211906 : collection_rec->mw_vec.truncate (0);
3186 :
3187 : /* Process REG_EQUIV/REG_EQUAL notes. */
3188 2049168674 : for (note = REG_NOTES (insn_info->insn); note;
3189 634956768 : note = XEXP (note, 1))
3190 : {
3191 634956768 : switch (REG_NOTE_KIND (note))
3192 : {
3193 47844434 : case REG_EQUIV:
3194 47844434 : case REG_EQUAL:
3195 47844434 : df_uses_record (collection_rec,
3196 : &XEXP (note, 0), DF_REF_REG_USE,
3197 : bb, insn_info, DF_REF_IN_NOTE);
3198 47844434 : break;
3199 7073 : case REG_NON_LOCAL_GOTO:
3200 : /* The frame ptr is used by a non-local goto. */
3201 7073 : df_ref_record (DF_REF_BASE, collection_rec,
3202 7073 : regno_reg_rtx[FRAME_POINTER_REGNUM],
3203 : NULL, bb, insn_info,
3204 : DF_REF_REG_USE, 0);
3205 7073 : if (!HARD_FRAME_POINTER_IS_FRAME_POINTER)
3206 7073 : df_ref_record (DF_REF_BASE, collection_rec,
3207 7073 : regno_reg_rtx[HARD_FRAME_POINTER_REGNUM],
3208 : NULL, bb, insn_info,
3209 : DF_REF_REG_USE, 0);
3210 7073 : break;
3211 : default:
3212 : break;
3213 : }
3214 : }
3215 :
3216 1414211906 : int flags = (is_cond_exec) ? DF_REF_CONDITIONAL : 0;
3217 : /* For CALL_INSNs, first record DF_REF_BASE register defs, as well as
3218 : uses from CALL_INSN_FUNCTION_USAGE. */
3219 1414211906 : if (CALL_P (insn_info->insn))
3220 84143121 : df_get_call_refs (collection_rec, bb, insn_info, flags);
3221 :
3222 : /* Record other defs. These should be mostly for DF_REF_REGULAR, so
3223 : that a qsort on the defs is unnecessary in most cases. */
3224 1414211906 : df_defs_record (collection_rec,
3225 1414211906 : PATTERN (insn_info->insn), bb, insn_info, 0);
3226 :
3227 : /* Record the register uses. */
3228 1414211906 : df_uses_record (collection_rec,
3229 1414211906 : &PATTERN (insn_info->insn), DF_REF_REG_USE, bb, insn_info, 0);
3230 :
3231 : /* DF_REF_CONDITIONAL needs corresponding USES. */
3232 1414211906 : if (is_cond_exec)
3233 0 : df_get_conditional_uses (collection_rec);
3234 :
3235 1414211906 : df_canonize_collection_rec (collection_rec);
3236 1414211906 : }
3237 :
3238 : /* Recompute the luids for the insns in BB. */
3239 :
3240 : void
3241 22918213 : df_recompute_luids (basic_block bb)
3242 : {
3243 22918213 : rtx_insn *insn;
3244 22918213 : int luid = 0;
3245 :
3246 22918213 : df_grow_insn_info ();
3247 :
3248 : /* Scan the block an insn at a time from beginning to end. */
3249 281830006 : FOR_BB_INSNS (bb, insn)
3250 : {
3251 258911793 : struct df_insn_info *insn_info = DF_INSN_INFO_GET (insn);
3252 : /* Inserting labels does not always trigger the incremental
3253 : rescanning. */
3254 258911793 : if (!insn_info)
3255 : {
3256 2183797 : gcc_assert (!INSN_P (insn));
3257 2183797 : insn_info = df_insn_create_insn_record (insn);
3258 : }
3259 :
3260 258911793 : DF_INSN_INFO_LUID (insn_info) = luid;
3261 258911793 : if (INSN_P (insn))
3262 214139749 : luid++;
3263 : }
3264 22918213 : }
3265 :
3266 :
3267 : /* Collect all artificial refs at the block level for BB and add them
3268 : to COLLECTION_REC. */
3269 :
3270 : static void
3271 120917164 : df_bb_refs_collect (class df_collection_rec *collection_rec, basic_block bb)
3272 : {
3273 120917164 : collection_rec->def_vec.truncate (0);
3274 120917164 : collection_rec->use_vec.truncate (0);
3275 120917164 : collection_rec->eq_use_vec.truncate (0);
3276 120917164 : collection_rec->mw_vec.truncate (0);
3277 :
3278 120917164 : if (bb->index == ENTRY_BLOCK)
3279 : {
3280 6379161 : df_entry_block_defs_collect (collection_rec, df->entry_block_defs);
3281 6379161 : return;
3282 : }
3283 114538003 : else if (bb->index == EXIT_BLOCK)
3284 : {
3285 6379161 : df_exit_block_uses_collect (collection_rec, df->exit_block_uses);
3286 6379161 : return;
3287 : }
3288 :
3289 108158842 : if (bb_has_eh_pred (bb))
3290 : {
3291 : unsigned int i;
3292 : /* Mark the registers that will contain data for the handler. */
3293 3319958 : for (i = 0; ; ++i)
3294 : {
3295 4979937 : unsigned regno = EH_RETURN_DATA_REGNO (i);
3296 3319958 : if (regno == INVALID_REGNUM)
3297 : break;
3298 3319958 : df_ref_record (DF_REF_ARTIFICIAL, collection_rec, regno_reg_rtx[regno], NULL,
3299 : bb, NULL, DF_REF_REG_DEF, DF_REF_AT_TOP);
3300 3319958 : }
3301 : }
3302 :
3303 : /* Add the hard_frame_pointer if this block is the target of a
3304 : non-local goto. */
3305 108158842 : if (bb->flags & BB_NON_LOCAL_GOTO_TARGET)
3306 8799 : df_ref_record (DF_REF_ARTIFICIAL, collection_rec, hard_frame_pointer_rtx, NULL,
3307 : bb, NULL, DF_REF_REG_DEF, DF_REF_AT_TOP);
3308 :
3309 : /* Add the artificial uses. */
3310 108158842 : if (bb->index >= NUM_FIXED_BLOCKS)
3311 : {
3312 108158842 : bitmap_iterator bi;
3313 108158842 : unsigned int regno;
3314 108158842 : bitmap au = bb_has_eh_pred (bb)
3315 108158842 : ? &df->eh_block_artificial_uses
3316 108158842 : : &df->regular_block_artificial_uses;
3317 :
3318 392536423 : EXECUTE_IF_SET_IN_BITMAP (au, 0, regno, bi)
3319 : {
3320 284377581 : df_ref_record (DF_REF_ARTIFICIAL, collection_rec, regno_reg_rtx[regno], NULL,
3321 : bb, NULL, DF_REF_REG_USE, 0);
3322 : }
3323 : }
3324 :
3325 108158842 : df_canonize_collection_rec (collection_rec);
3326 : }
3327 :
3328 :
3329 : /* Record all the refs within the basic block BB_INDEX and scan the instructions if SCAN_INSNS. */
3330 :
3331 : void
3332 43687952 : df_bb_refs_record (int bb_index, bool scan_insns)
3333 : {
3334 43687952 : basic_block bb = BASIC_BLOCK_FOR_FN (cfun, bb_index);
3335 43687952 : rtx_insn *insn;
3336 43687952 : int luid = 0;
3337 :
3338 43687952 : if (!df)
3339 6439791 : return;
3340 :
3341 37248161 : df_collection_rec collection_rec;
3342 37248161 : df_grow_bb_info (df_scan);
3343 37248161 : if (scan_insns)
3344 : /* Scan the block an insn at a time from beginning to end. */
3345 378359196 : FOR_BB_INSNS (bb, insn)
3346 : {
3347 347728147 : struct df_insn_info *insn_info = DF_INSN_INFO_GET (insn);
3348 347728147 : gcc_assert (!insn_info);
3349 :
3350 347728147 : insn_info = df_insn_create_insn_record (insn);
3351 347728147 : if (INSN_P (insn))
3352 : {
3353 : /* Record refs within INSN. */
3354 293003544 : DF_INSN_INFO_LUID (insn_info) = luid++;
3355 293003544 : df_insn_refs_collect (&collection_rec, bb, DF_INSN_INFO_GET (insn));
3356 293003544 : df_refs_add_to_chains (&collection_rec, bb, insn, copy_all);
3357 : }
3358 347728147 : DF_INSN_INFO_LUID (insn_info) = luid;
3359 : }
3360 :
3361 : /* Other block level artificial refs */
3362 37248161 : df_bb_refs_collect (&collection_rec, bb);
3363 37248161 : df_refs_add_to_chains (&collection_rec, bb, NULL, copy_all);
3364 :
3365 : /* Now that the block has been processed, set the block as dirty so
3366 : LR and LIVE will get it processed. */
3367 37248161 : df_set_bb_dirty (bb);
3368 37248161 : }
3369 :
3370 :
3371 : /* Get the artificial use set for a regular (i.e. non-exit/non-entry)
3372 : block. */
3373 :
3374 : static void
3375 9420877 : df_get_regular_block_artificial_uses (bitmap regular_block_artificial_uses)
3376 : {
3377 : #ifdef EH_USES
3378 : unsigned int i;
3379 : #endif
3380 :
3381 9420877 : bitmap_clear (regular_block_artificial_uses);
3382 :
3383 9420877 : if (reload_completed)
3384 : {
3385 5122634 : if (frame_pointer_needed)
3386 1155884 : bitmap_set_bit (regular_block_artificial_uses, HARD_FRAME_POINTER_REGNUM);
3387 : }
3388 : else
3389 : /* Before reload, there are a few registers that must be forced
3390 : live everywhere -- which might not already be the case for
3391 : blocks within infinite loops. */
3392 : {
3393 4298243 : unsigned int picreg = PIC_OFFSET_TABLE_REGNUM;
3394 :
3395 : /* Any reference to any pseudo before reload is a potential
3396 : reference of the frame pointer. */
3397 4298243 : bitmap_set_bit (regular_block_artificial_uses, FRAME_POINTER_REGNUM);
3398 :
3399 4298243 : if (!HARD_FRAME_POINTER_IS_FRAME_POINTER)
3400 4298243 : bitmap_set_bit (regular_block_artificial_uses,
3401 : HARD_FRAME_POINTER_REGNUM);
3402 :
3403 : /* Pseudos with argument area equivalences may require
3404 : reloading via the argument pointer. */
3405 4298243 : if (FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
3406 4298243 : && fixed_regs[ARG_POINTER_REGNUM])
3407 4298243 : bitmap_set_bit (regular_block_artificial_uses, ARG_POINTER_REGNUM);
3408 :
3409 : /* Any constant, or pseudo with constant equivalences, may
3410 : require reloading from memory using the pic register. */
3411 4298243 : if (picreg != INVALID_REGNUM
3412 0 : && fixed_regs[picreg])
3413 0 : bitmap_set_bit (regular_block_artificial_uses, picreg);
3414 : }
3415 : /* The all-important stack pointer must always be live. */
3416 9420877 : bitmap_set_bit (regular_block_artificial_uses, STACK_POINTER_REGNUM);
3417 :
3418 : #ifdef EH_USES
3419 : /* EH_USES registers are used:
3420 : 1) at all insns that might throw (calls or with -fnon-call-exceptions
3421 : trapping insns)
3422 : 2) in all EH edges
3423 : 3) to support backtraces and/or debugging, anywhere between their
3424 : initialization and where they the saved registers are restored
3425 : from them, including the cases where we don't reach the epilogue
3426 : (noreturn call or infinite loop). */
3427 : for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
3428 : if (EH_USES (i))
3429 : bitmap_set_bit (regular_block_artificial_uses, i);
3430 : #endif
3431 9420877 : }
3432 :
3433 :
3434 : /* Get the artificial use set for an eh block. */
3435 :
3436 : static void
3437 9420877 : df_get_eh_block_artificial_uses (bitmap eh_block_artificial_uses)
3438 : {
3439 9420877 : bitmap_clear (eh_block_artificial_uses);
3440 :
3441 : /* The following code (down through the arg_pointer setting APPEARS
3442 : to be necessary because there is nothing that actually
3443 : describes what the exception handling code may actually need
3444 : to keep alive. */
3445 9420877 : if (reload_completed)
3446 : {
3447 5122634 : if (frame_pointer_needed)
3448 : {
3449 1155884 : bitmap_set_bit (eh_block_artificial_uses, FRAME_POINTER_REGNUM);
3450 1155884 : if (!HARD_FRAME_POINTER_IS_FRAME_POINTER)
3451 1155884 : bitmap_set_bit (eh_block_artificial_uses,
3452 : HARD_FRAME_POINTER_REGNUM);
3453 : }
3454 5122634 : if (FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
3455 5122634 : && fixed_regs[ARG_POINTER_REGNUM])
3456 5122634 : bitmap_set_bit (eh_block_artificial_uses, ARG_POINTER_REGNUM);
3457 : }
3458 9420877 : }
3459 :
3460 :
3461 :
3462 : /*----------------------------------------------------------------------------
3463 : Specialized hard register scanning functions.
3464 : ----------------------------------------------------------------------------*/
3465 :
3466 :
3467 : /* Mark a register in SET. Hard registers in large modes get all
3468 : of their component registers set as well. */
3469 :
3470 : static void
3471 9746523 : df_mark_reg (rtx reg, void *vset)
3472 : {
3473 9746168 : bitmap_set_range ((bitmap) vset, REGNO (reg), REG_NREGS (reg));
3474 355 : }
3475 :
3476 :
3477 : /* Set the bit for regs that are considered being defined at the entry. */
3478 :
3479 : static void
3480 16516080 : df_get_entry_block_def_set (bitmap entry_block_defs)
3481 : {
3482 16516080 : rtx r;
3483 16516080 : int i;
3484 :
3485 16516080 : bitmap_clear (entry_block_defs);
3486 :
3487 : /* For separate shrink-wrapping we use LIVE to analyze which basic blocks
3488 : need a prologue for some component to be executed before that block,
3489 : and we do not care about any other registers. Hence, we do not want
3490 : any register for any component defined in the entry block, and we can
3491 : just leave all registers undefined. */
3492 16516080 : if (df_scan->local_flags & DF_SCAN_EMPTY_ENTRY_EXIT)
3493 : return;
3494 :
3495 1467567714 : for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
3496 : {
3497 1451787416 : if (global_regs[i])
3498 1742 : bitmap_set_bit (entry_block_defs, i);
3499 1451787416 : if (FUNCTION_ARG_REGNO_P (i))
3500 224918681 : bitmap_set_bit (entry_block_defs, INCOMING_REGNO (i));
3501 : }
3502 :
3503 : /* The always important stack pointer. */
3504 15780298 : bitmap_set_bit (entry_block_defs, STACK_POINTER_REGNUM);
3505 :
3506 : /* Once the prologue has been generated, all of these registers
3507 : should just show up in the first regular block. */
3508 15780298 : if (targetm.have_prologue () && epilogue_completed)
3509 : {
3510 : /* Defs for the callee saved registers are inserted so that the
3511 : pushes have some defining location. */
3512 265150533 : for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
3513 262299452 : if (!crtl->abi->clobbers_full_reg_p (i)
3514 26005154 : && !fixed_regs[i]
3515 279730537 : && df_regs_ever_live_p (i))
3516 3796726 : bitmap_set_bit (entry_block_defs, i);
3517 : }
3518 :
3519 15780298 : r = targetm.calls.struct_value_rtx (current_function_decl, true);
3520 15780298 : if (r && REG_P (r))
3521 0 : bitmap_set_bit (entry_block_defs, REGNO (r));
3522 :
3523 : /* If the function has an incoming STATIC_CHAIN, it has to show up
3524 : in the entry def set. */
3525 15780298 : r = rtx_for_static_chain (current_function_decl, true);
3526 15780298 : if (r && REG_P (r))
3527 212238 : bitmap_set_bit (entry_block_defs, REGNO (r));
3528 :
3529 15780298 : if ((!reload_completed) || frame_pointer_needed)
3530 : {
3531 : /* Any reference to any pseudo before reload is a potential
3532 : reference of the frame pointer. */
3533 9206746 : bitmap_set_bit (entry_block_defs, FRAME_POINTER_REGNUM);
3534 :
3535 : /* If they are different, also mark the hard frame pointer as live. */
3536 9206746 : if (!HARD_FRAME_POINTER_IS_FRAME_POINTER
3537 : && !LOCAL_REGNO (HARD_FRAME_POINTER_REGNUM))
3538 9206746 : bitmap_set_bit (entry_block_defs, HARD_FRAME_POINTER_REGNUM);
3539 : }
3540 :
3541 : /* These registers are live everywhere. */
3542 15780298 : if (!reload_completed)
3543 : {
3544 : /* Pseudos with argument area equivalences may require
3545 : reloading via the argument pointer. */
3546 7195445 : if (FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
3547 7195445 : && fixed_regs[ARG_POINTER_REGNUM])
3548 7195445 : bitmap_set_bit (entry_block_defs, ARG_POINTER_REGNUM);
3549 :
3550 : /* Any constant, or pseudo with constant equivalences, may
3551 : require reloading from memory using the pic register. */
3552 7195445 : unsigned int picreg = PIC_OFFSET_TABLE_REGNUM;
3553 0 : if (picreg != INVALID_REGNUM
3554 0 : && fixed_regs[picreg])
3555 0 : bitmap_set_bit (entry_block_defs, picreg);
3556 : }
3557 :
3558 : #ifdef INCOMING_RETURN_ADDR_RTX
3559 17222076 : if (REG_P (INCOMING_RETURN_ADDR_RTX))
3560 0 : bitmap_set_bit (entry_block_defs, REGNO (INCOMING_RETURN_ADDR_RTX));
3561 : #endif
3562 :
3563 15780298 : targetm.extra_live_on_entry (entry_block_defs);
3564 : }
3565 :
3566 :
3567 : /* Return the (conservative) set of hard registers that are defined on
3568 : entry to the function.
3569 : It uses df->entry_block_defs to determine which register
3570 : reference to include. */
3571 :
3572 : static void
3573 12181503 : df_entry_block_defs_collect (class df_collection_rec *collection_rec,
3574 : bitmap entry_block_defs)
3575 : {
3576 12181503 : unsigned int i;
3577 12181503 : bitmap_iterator bi;
3578 :
3579 205405767 : EXECUTE_IF_SET_IN_BITMAP (entry_block_defs, 0, i, bi)
3580 : {
3581 193224264 : df_ref_record (DF_REF_ARTIFICIAL, collection_rec, regno_reg_rtx[i], NULL,
3582 193224264 : ENTRY_BLOCK_PTR_FOR_FN (cfun), NULL, DF_REF_REG_DEF, 0);
3583 : }
3584 :
3585 12181503 : df_canonize_collection_rec (collection_rec);
3586 12181503 : }
3587 :
3588 :
3589 : /* Record the (conservative) set of hard registers that are defined on
3590 : entry to the function. */
3591 :
3592 : static void
3593 5802342 : df_record_entry_block_defs (bitmap entry_block_defs)
3594 : {
3595 5802342 : class df_collection_rec collection_rec;
3596 5802342 : df_entry_block_defs_collect (&collection_rec, entry_block_defs);
3597 :
3598 : /* Process bb_refs chain */
3599 5802342 : df_refs_add_to_chains (&collection_rec,
3600 5802342 : BASIC_BLOCK_FOR_FN (cfun, ENTRY_BLOCK),
3601 : NULL,
3602 : copy_defs);
3603 5802342 : }
3604 :
3605 :
3606 : /* Update the defs in the entry block. */
3607 :
3608 : void
3609 7095203 : df_update_entry_block_defs (void)
3610 : {
3611 7095203 : bool changed = false;
3612 :
3613 7095203 : auto_bitmap refs (&df_bitmap_obstack);
3614 7095203 : df_get_entry_block_def_set (refs);
3615 7095203 : gcc_assert (df->entry_block_defs);
3616 7095203 : if (!bitmap_equal_p (df->entry_block_defs, refs))
3617 : {
3618 2760626 : struct df_scan_bb_info *bb_info = df_scan_get_bb_info (ENTRY_BLOCK);
3619 2760626 : df_ref_chain_delete_du_chain (bb_info->artificial_defs);
3620 2760626 : df_ref_chain_delete (bb_info->artificial_defs);
3621 2760626 : bb_info->artificial_defs = NULL;
3622 2760626 : changed = true;
3623 : }
3624 :
3625 2760626 : if (changed)
3626 : {
3627 2760626 : df_record_entry_block_defs (refs);
3628 2760626 : bitmap_copy (df->entry_block_defs, refs);
3629 2760626 : df_set_bb_dirty (BASIC_BLOCK_FOR_FN (cfun, ENTRY_BLOCK));
3630 : }
3631 7095203 : }
3632 :
3633 :
3634 : /* Return true if REGNO is used by the epilogue. */
3635 : bool
3636 1656573810 : df_epilogue_uses_p (unsigned int regno)
3637 : {
3638 1656573810 : return (EPILOGUE_USES (regno)
3639 1656573810 : || TEST_HARD_REG_BIT (crtl->must_be_zero_on_return, regno));
3640 : }
3641 :
3642 : /* Set the bit for regs that are considered being used at the exit. */
3643 :
3644 : void
3645 18742041 : df_get_exit_block_use_set (bitmap exit_block_uses)
3646 : {
3647 18742041 : unsigned int i;
3648 18742041 : unsigned int picreg = PIC_OFFSET_TABLE_REGNUM;
3649 :
3650 18742041 : bitmap_clear (exit_block_uses);
3651 :
3652 : /* For separate shrink-wrapping we use LIVE to analyze which basic blocks
3653 : need an epilogue for some component to be executed after that block,
3654 : and we do not care about any other registers. Hence, we do not want
3655 : any register for any component seen as used in the exit block, and we
3656 : can just say no registers at all are used. */
3657 18742041 : if (df_scan->local_flags & DF_SCAN_EMPTY_ENTRY_EXIT)
3658 : return;
3659 :
3660 : /* Stack pointer is always live at the exit. */
3661 18006259 : bitmap_set_bit (exit_block_uses, STACK_POINTER_REGNUM);
3662 :
3663 : /* Mark the frame pointer if needed at the end of the function.
3664 : If we end up eliminating it, it will be removed from the live
3665 : list of each basic block by reload. */
3666 :
3667 18006259 : if ((!reload_completed) || frame_pointer_needed)
3668 : {
3669 11432577 : bitmap_set_bit (exit_block_uses, FRAME_POINTER_REGNUM);
3670 :
3671 : /* If they are different, also mark the hard frame pointer as live. */
3672 11432577 : if (!HARD_FRAME_POINTER_IS_FRAME_POINTER
3673 : && !LOCAL_REGNO (HARD_FRAME_POINTER_REGNUM))
3674 11432577 : bitmap_set_bit (exit_block_uses, HARD_FRAME_POINTER_REGNUM);
3675 : }
3676 :
3677 : /* Many architectures have a GP register even without flag_pic.
3678 : Assume the pic register is not in use, or will be handled by
3679 : other means, if it is not fixed. */
3680 18006259 : if (!PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
3681 : && picreg != INVALID_REGNUM
3682 0 : && fixed_regs[picreg])
3683 0 : bitmap_set_bit (exit_block_uses, picreg);
3684 :
3685 : /* Mark all global registers, and all registers used by the
3686 : epilogue as being live at the end of the function since they
3687 : may be referenced by our caller. */
3688 1674582087 : for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
3689 1656575828 : if (global_regs[i] || df_epilogue_uses_p (i))
3690 7953 : bitmap_set_bit (exit_block_uses, i);
3691 :
3692 18006259 : if (targetm.have_epilogue () && epilogue_completed)
3693 : {
3694 : /* Mark all call-saved registers that we actually used. */
3695 265162623 : for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
3696 262311412 : if (df_regs_ever_live_p (i)
3697 : && !LOCAL_REGNO (i)
3698 262311412 : && !crtl->abi->clobbers_full_reg_p (i))
3699 5933241 : bitmap_set_bit (exit_block_uses, i);
3700 : }
3701 :
3702 : /* Mark the registers that will contain data for the handler. */
3703 18006259 : if (reload_completed && crtl->calls_eh_return)
3704 172 : IOR_REG_SET_HRS (exit_block_uses, eh_return_data_regs);
3705 :
3706 : #ifdef EH_RETURN_STACKADJ_RTX
3707 36012518 : if ((!targetm.have_epilogue () || ! epilogue_completed)
3708 33161307 : && crtl->calls_eh_return)
3709 : {
3710 459 : rtx tmp = EH_RETURN_STACKADJ_RTX;
3711 355 : if (tmp && REG_P (tmp))
3712 355 : df_mark_reg (tmp, exit_block_uses);
3713 : }
3714 : #endif
3715 :
3716 : #ifdef EH_RETURN_TAKEN_RTX
3717 : if ((!targetm.have_epilogue () || ! epilogue_completed)
3718 : && crtl->calls_eh_return)
3719 : {
3720 : rtx tmp = EH_RETURN_TAKEN_RTX;
3721 : if (tmp && REG_P (tmp))
3722 : df_mark_reg (tmp, exit_block_uses);
3723 : }
3724 : #endif
3725 :
3726 18006259 : if ((!targetm.have_epilogue () || ! epilogue_completed)
3727 : && crtl->calls_eh_return)
3728 : {
3729 18006259 : rtx tmp = EH_RETURN_HANDLER_RTX;
3730 18006259 : if (tmp && REG_P (tmp))
3731 : df_mark_reg (tmp, exit_block_uses);
3732 : }
3733 :
3734 : /* Mark function return value. */
3735 18006259 : diddle_return_value (df_mark_reg, (void*) exit_block_uses);
3736 : }
3737 :
3738 :
3739 : /* Return the refs of hard registers that are used in the exit block.
3740 : It uses df->exit_block_uses to determine register to include. */
3741 :
3742 : static void
3743 11856221 : df_exit_block_uses_collect (class df_collection_rec *collection_rec, bitmap exit_block_uses)
3744 : {
3745 11856221 : unsigned int i;
3746 11856221 : bitmap_iterator bi;
3747 :
3748 43235259 : EXECUTE_IF_SET_IN_BITMAP (exit_block_uses, 0, i, bi)
3749 31379038 : df_ref_record (DF_REF_ARTIFICIAL, collection_rec, regno_reg_rtx[i], NULL,
3750 31379038 : EXIT_BLOCK_PTR_FOR_FN (cfun), NULL, DF_REF_REG_USE, 0);
3751 :
3752 : /* It is deliberate that this is not put in the exit block uses but
3753 : I do not know why. */
3754 11856221 : if (FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
3755 11856221 : && reload_completed
3756 7557978 : && !bitmap_bit_p (exit_block_uses, ARG_POINTER_REGNUM)
3757 7557978 : && bb_has_eh_pred (EXIT_BLOCK_PTR_FOR_FN (cfun))
3758 11856221 : && fixed_regs[ARG_POINTER_REGNUM])
3759 0 : df_ref_record (DF_REF_ARTIFICIAL, collection_rec, regno_reg_rtx[ARG_POINTER_REGNUM], NULL,
3760 : EXIT_BLOCK_PTR_FOR_FN (cfun), NULL, DF_REF_REG_USE, 0);
3761 :
3762 11856221 : df_canonize_collection_rec (collection_rec);
3763 11856221 : }
3764 :
3765 :
3766 : /* Record the set of hard registers that are used in the exit block.
3767 : It uses df->exit_block_uses to determine which bit to include. */
3768 :
3769 : static void
3770 5477060 : df_record_exit_block_uses (bitmap exit_block_uses)
3771 : {
3772 5477060 : class df_collection_rec collection_rec;
3773 5477060 : df_exit_block_uses_collect (&collection_rec, exit_block_uses);
3774 :
3775 : /* Process bb_refs chain */
3776 5477060 : df_refs_add_to_chains (&collection_rec,
3777 5477060 : BASIC_BLOCK_FOR_FN (cfun, EXIT_BLOCK),
3778 : NULL,
3779 : copy_uses);
3780 5477060 : }
3781 :
3782 :
3783 : /* Update the uses in the exit block. */
3784 :
3785 : void
3786 8357183 : df_update_exit_block_uses (void)
3787 : {
3788 8357183 : bool changed = false;
3789 :
3790 8357183 : auto_bitmap refs (&df_bitmap_obstack);
3791 8357183 : df_get_exit_block_use_set (refs);
3792 8357183 : gcc_assert (df->exit_block_uses);
3793 8357183 : if (!bitmap_equal_p (df->exit_block_uses, refs))
3794 : {
3795 2435344 : struct df_scan_bb_info *bb_info = df_scan_get_bb_info (EXIT_BLOCK);
3796 2435344 : df_ref_chain_delete_du_chain (bb_info->artificial_uses);
3797 2435344 : df_ref_chain_delete (bb_info->artificial_uses);
3798 2435344 : bb_info->artificial_uses = NULL;
3799 2435344 : changed = true;
3800 : }
3801 :
3802 2435344 : if (changed)
3803 : {
3804 2435344 : df_record_exit_block_uses (refs);
3805 2435344 : bitmap_copy (df->exit_block_uses, refs);
3806 2435344 : df_set_bb_dirty (BASIC_BLOCK_FOR_FN (cfun, EXIT_BLOCK));
3807 : }
3808 8357183 : }
3809 :
3810 : static bool initialized = false;
3811 :
3812 :
3813 : /* Initialize some platform specific structures. */
3814 :
3815 : void
3816 1471365 : df_hard_reg_init (void)
3817 : {
3818 1471365 : int i;
3819 1471365 : static const struct {const int from, to; } eliminables[] = ELIMINABLE_REGS;
3820 :
3821 1471365 : if (initialized)
3822 : return;
3823 :
3824 : /* Record which registers will be eliminated. We use this in
3825 : mark_used_regs. */
3826 1039925 : CLEAR_HARD_REG_SET (elim_reg_set);
3827 :
3828 1039925 : for (i = 0; i < (int) ARRAY_SIZE (eliminables); i++)
3829 831940 : SET_HARD_REG_BIT (elim_reg_set, eliminables[i].from);
3830 :
3831 207985 : initialized = true;
3832 : }
3833 :
3834 : /* Recompute the parts of scanning that are based on regs_ever_live
3835 : because something changed in that array. */
3836 :
3837 : void
3838 6676214 : df_update_entry_exit_and_calls (void)
3839 : {
3840 6676214 : basic_block bb;
3841 :
3842 6676214 : df_update_entry_block_defs ();
3843 6676214 : df_update_exit_block_uses ();
3844 :
3845 : /* The call insns need to be rescanned because there may be changes
3846 : in the set of registers clobbered across the call. */
3847 79475273 : FOR_EACH_BB_FN (bb, cfun)
3848 : {
3849 72799059 : rtx_insn *insn;
3850 912992711 : FOR_BB_INSNS (bb, insn)
3851 : {
3852 840193652 : if (INSN_P (insn) && CALL_P (insn))
3853 29643218 : df_insn_rescan (insn);
3854 : }
3855 : }
3856 6676214 : }
3857 :
3858 :
3859 : /* Return true if hard REG is actually used in the some instruction.
3860 : There are a fair number of conditions that affect the setting of
3861 : this array. See the comment in df.h for df->hard_regs_live_count
3862 : for the conditions that this array is set. */
3863 :
3864 : bool
3865 4134124042 : df_hard_reg_used_p (unsigned int reg)
3866 : {
3867 4134124042 : return df->hard_regs_live_count[reg] != 0;
3868 : }
3869 :
3870 :
3871 : /* A count of the number of times REG is actually used in the some
3872 : instruction. There are a fair number of conditions that affect the
3873 : setting of this array. See the comment in df.h for
3874 : df->hard_regs_live_count for the conditions that this array is
3875 : set. */
3876 :
3877 :
3878 : unsigned int
3879 0 : df_hard_reg_used_count (unsigned int reg)
3880 : {
3881 0 : return df->hard_regs_live_count[reg];
3882 : }
3883 :
3884 :
3885 : /* Get the value of regs_ever_live[REGNO]. */
3886 :
3887 : bool
3888 733840925 : df_regs_ever_live_p (unsigned int regno)
3889 : {
3890 733840925 : return regs_ever_live[regno];
3891 : }
3892 :
3893 : /* Set regs_ever_live[REGNO] to VALUE. If this cause regs_ever_live
3894 : to change, schedule that change for the next update. */
3895 :
3896 : void
3897 103215138 : df_set_regs_ever_live (unsigned int regno, bool value)
3898 : {
3899 103215138 : if (regs_ever_live[regno] == value)
3900 : return;
3901 :
3902 3578599 : regs_ever_live[regno] = value;
3903 3578599 : if (df)
3904 3578599 : df->redo_entry_and_exit = true;
3905 : }
3906 :
3907 :
3908 : /* Compute "regs_ever_live" information from the underlying df
3909 : information. Set the vector to all false if RESET. */
3910 :
3911 : void
3912 47738146 : df_compute_regs_ever_live (bool reset)
3913 : {
3914 47738146 : unsigned int i;
3915 47738146 : bool changed = df->redo_entry_and_exit;
3916 :
3917 47738146 : if (reset)
3918 2549691 : memset (regs_ever_live, 0, sizeof (regs_ever_live));
3919 :
3920 4439647578 : for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
3921 4391909432 : if ((!regs_ever_live[i]) && df_hard_reg_used_p (i))
3922 : {
3923 12485495 : regs_ever_live[i] = true;
3924 12485495 : changed = true;
3925 : }
3926 47738146 : if (changed)
3927 3274178 : df_update_entry_exit_and_calls ();
3928 47738146 : df->redo_entry_and_exit = false;
3929 47738146 : }
3930 :
3931 :
3932 : /*----------------------------------------------------------------------------
3933 : Dataflow ref information verification functions.
3934 :
3935 : df_reg_chain_mark (refs, regno, is_def, is_eq_use)
3936 : df_reg_chain_verify_unmarked (refs)
3937 : df_refs_verify (vec<stack, va_df_ref>, ref*, bool)
3938 : df_mws_verify (mw*, mw*, bool)
3939 : df_insn_refs_verify (collection_rec, bb, insn, bool)
3940 : df_bb_refs_verify (bb, refs, bool)
3941 : df_bb_verify (bb)
3942 : df_exit_block_bitmap_verify (bool)
3943 : df_entry_block_bitmap_verify (bool)
3944 : df_scan_verify ()
3945 : ----------------------------------------------------------------------------*/
3946 :
3947 :
3948 : /* Mark all refs in the reg chain. Verify that all of the registers
3949 : are in the correct chain. */
3950 :
3951 : static unsigned int
3952 2778155184 : df_reg_chain_mark (df_ref refs, unsigned int regno,
3953 : bool is_def, bool is_eq_use)
3954 : {
3955 2778155184 : unsigned int count = 0;
3956 2778155184 : df_ref ref;
3957 6340761601 : for (ref = refs; ref; ref = DF_REF_NEXT_REG (ref))
3958 : {
3959 3562606417 : gcc_assert (!DF_REF_IS_REG_MARKED (ref));
3960 :
3961 : /* If there are no def-use or use-def chains, make sure that all
3962 : of the chains are clear. */
3963 3562606417 : if (!df_chain)
3964 3259735385 : gcc_assert (!DF_REF_CHAIN (ref));
3965 :
3966 : /* Check to make sure the ref is in the correct chain. */
3967 3562606417 : gcc_assert (DF_REF_REGNO (ref) == regno);
3968 3562606417 : if (is_def)
3969 2794549688 : gcc_assert (DF_REF_REG_DEF_P (ref));
3970 : else
3971 768056729 : gcc_assert (!DF_REF_REG_DEF_P (ref));
3972 :
3973 3562606417 : if (is_eq_use)
3974 17406510 : gcc_assert ((DF_REF_FLAGS (ref) & DF_REF_IN_NOTE));
3975 : else
3976 3545199907 : gcc_assert ((DF_REF_FLAGS (ref) & DF_REF_IN_NOTE) == 0);
3977 :
3978 3562606417 : if (DF_REF_NEXT_REG (ref))
3979 2971222282 : gcc_assert (DF_REF_PREV_REG (DF_REF_NEXT_REG (ref)) == ref);
3980 3562606417 : count++;
3981 3562606417 : DF_REF_REG_MARK (ref);
3982 : }
3983 2778155184 : return count;
3984 : }
3985 :
3986 :
3987 : /* Verify that all of the registers in the chain are unmarked. */
3988 :
3989 : static void
3990 2778155184 : df_reg_chain_verify_unmarked (df_ref refs)
3991 : {
3992 2778155184 : df_ref ref;
3993 6340761601 : for (ref = refs; ref; ref = DF_REF_NEXT_REG (ref))
3994 3562606417 : gcc_assert (!DF_REF_IS_REG_MARKED (ref));
3995 2778155184 : }
3996 :
3997 :
3998 : /* Verify that NEW_REC and OLD_REC have exactly the same members. */
3999 :
4000 : static bool
4001 3355278876 : df_refs_verify (const vec<df_ref, va_heap> *new_rec, df_ref old_rec,
4002 : bool abort_if_fail)
4003 : {
4004 3355278876 : unsigned int ix;
4005 3355278876 : df_ref new_ref;
4006 :
4007 10921143081 : FOR_EACH_VEC_ELT (*new_rec, ix, new_ref)
4008 : {
4009 7621092987 : if (old_rec == NULL || !df_ref_equal_p (new_ref, old_rec))
4010 : {
4011 55228782 : if (abort_if_fail)
4012 0 : gcc_assert (0);
4013 : else
4014 : return false;
4015 : }
4016 :
4017 : /* Abort if fail is called from the function level verifier. If
4018 : that is the context, mark this reg as being seem. */
4019 7565864205 : if (abort_if_fail)
4020 : {
4021 3562606417 : gcc_assert (DF_REF_IS_REG_MARKED (old_rec));
4022 3562606417 : DF_REF_REG_UNMARK (old_rec);
4023 : }
4024 :
4025 7565864205 : old_rec = DF_REF_NEXT_LOC (old_rec);
4026 : }
4027 :
4028 3300050094 : if (abort_if_fail)
4029 2225979598 : gcc_assert (old_rec == NULL);
4030 : else
4031 1074070496 : return old_rec == NULL;
4032 : return false;
4033 : }
4034 :
4035 :
4036 : /* Verify that NEW_REC and OLD_REC have exactly the same members. */
4037 :
4038 : static bool
4039 1024854322 : df_mws_verify (const vec<df_mw_hardreg *, va_heap> *new_rec,
4040 : struct df_mw_hardreg *old_rec,
4041 : bool abort_if_fail)
4042 : {
4043 1024854322 : unsigned int ix;
4044 1024854322 : struct df_mw_hardreg *new_reg;
4045 :
4046 1030577851 : FOR_EACH_VEC_ELT (*new_rec, ix, new_reg)
4047 : {
4048 5725568 : if (old_rec == NULL || !df_mw_equal_p (new_reg, old_rec))
4049 : {
4050 2039 : if (abort_if_fail)
4051 0 : gcc_assert (0);
4052 : else
4053 : return false;
4054 : }
4055 5723529 : old_rec = DF_MWS_NEXT (old_rec);
4056 : }
4057 :
4058 1024852283 : if (abort_if_fail)
4059 686213864 : gcc_assert (old_rec == NULL);
4060 : else
4061 338638419 : return old_rec == NULL;
4062 : return false;
4063 : }
4064 :
4065 :
4066 : /* Return true if the existing insn refs information is complete and
4067 : correct. Otherwise (i.e. if there's any missing or extra refs),
4068 : return the correct df_ref chain in REFS_RETURN.
4069 :
4070 : If ABORT_IF_FAIL, leave the refs that are verified (already in the
4071 : ref chain) as DF_REF_MARKED(). If it's false, then it's a per-insn
4072 : verification mode instead of the whole function, so unmark
4073 : everything.
4074 :
4075 : If ABORT_IF_FAIL is set, this function never returns false. */
4076 :
4077 : static bool
4078 1083802768 : df_insn_refs_verify (class df_collection_rec *collection_rec,
4079 : basic_block bb,
4080 : rtx_insn *insn,
4081 : bool abort_if_fail)
4082 : {
4083 1083802768 : bool ret1, ret2, ret3;
4084 1083802768 : unsigned int uid = INSN_UID (insn);
4085 1083802768 : struct df_insn_info *insn_info = DF_INSN_INFO_GET (insn);
4086 :
4087 1083802768 : df_insn_refs_collect (collection_rec, bb, insn_info);
4088 :
4089 : /* Unfortunately we cannot opt out early if one of these is not
4090 : right and abort_if_fail is set because the marks will not get cleared. */
4091 1083802768 : ret1 = df_refs_verify (&collection_rec->def_vec, DF_INSN_UID_DEFS (uid),
4092 : abort_if_fail);
4093 1083802768 : if (!ret1 && !abort_if_fail)
4094 : return false;
4095 1076948348 : ret2 = df_refs_verify (&collection_rec->use_vec, DF_INSN_UID_USES (uid),
4096 : abort_if_fail);
4097 1076948348 : if (!ret2 && !abort_if_fail)
4098 : return false;
4099 1027189754 : ret3 = df_refs_verify (&collection_rec->eq_use_vec, DF_INSN_UID_EQ_USES (uid),
4100 : abort_if_fail);
4101 1027189754 : if (!ret3 && !abort_if_fail)
4102 : return false;
4103 1024854322 : if (! df_mws_verify (&collection_rec->mw_vec, DF_INSN_UID_MWS (uid),
4104 : abort_if_fail))
4105 : return false;
4106 338638419 : return (ret1 && ret2 && ret3);
4107 : }
4108 :
4109 :
4110 : /* Return true if all refs in the basic block are correct and complete.
4111 : Due to df_ref_chain_verify, it will cause all refs
4112 : that are verified to have DF_REF_MARK bit set. */
4113 :
4114 : static bool
4115 83669003 : df_bb_verify (basic_block bb)
4116 : {
4117 83669003 : rtx_insn *insn;
4118 83669003 : struct df_scan_bb_info *bb_info = df_scan_get_bb_info (bb->index);
4119 83669003 : class df_collection_rec collection_rec;
4120 :
4121 83669003 : gcc_assert (bb_info);
4122 :
4123 : /* Scan the block, one insn at a time, from beginning to end. */
4124 905255260 : FOR_BB_INSNS_REVERSE (bb, insn)
4125 : {
4126 821586257 : if (!INSN_P (insn))
4127 135372393 : continue;
4128 686213864 : df_insn_refs_verify (&collection_rec, bb, insn, true);
4129 686213864 : df_free_collection_rec (&collection_rec);
4130 : }
4131 :
4132 : /* Do the artificial defs and uses. */
4133 83669003 : df_bb_refs_collect (&collection_rec, bb);
4134 167338006 : df_refs_verify (&collection_rec.def_vec, df_get_artificial_defs (bb->index), true);
4135 83669003 : df_refs_verify (&collection_rec.use_vec, df_get_artificial_uses (bb->index), true);
4136 83669003 : df_free_collection_rec (&collection_rec);
4137 :
4138 167338006 : return true;
4139 83669003 : }
4140 :
4141 :
4142 : /* Returns true if the entry block has correct and complete df_ref set.
4143 : If not it either aborts if ABORT_IF_FAIL is true or returns false. */
4144 :
4145 : static bool
4146 6379161 : df_entry_block_bitmap_verify (bool abort_if_fail)
4147 : {
4148 6379161 : bool is_eq;
4149 :
4150 6379161 : auto_bitmap entry_block_defs (&df_bitmap_obstack);
4151 6379161 : df_get_entry_block_def_set (entry_block_defs);
4152 :
4153 6379161 : is_eq = bitmap_equal_p (entry_block_defs, df->entry_block_defs);
4154 :
4155 6379161 : if (!is_eq && abort_if_fail)
4156 : {
4157 0 : fprintf (stderr, "entry_block_defs = ");
4158 0 : df_print_regset (stderr, entry_block_defs);
4159 0 : fprintf (stderr, "df->entry_block_defs = ");
4160 0 : df_print_regset (stderr, df->entry_block_defs);
4161 0 : gcc_assert (0);
4162 : }
4163 :
4164 6379161 : return is_eq;
4165 6379161 : }
4166 :
4167 :
4168 : /* Returns true if the exit block has correct and complete df_ref set.
4169 : If not it either aborts if ABORT_IF_FAIL is true or returns false. */
4170 :
4171 : static bool
4172 6379161 : df_exit_block_bitmap_verify (bool abort_if_fail)
4173 : {
4174 6379161 : bool is_eq;
4175 :
4176 6379161 : auto_bitmap exit_block_uses (&df_bitmap_obstack);
4177 6379161 : df_get_exit_block_use_set (exit_block_uses);
4178 :
4179 6379161 : is_eq = bitmap_equal_p (exit_block_uses, df->exit_block_uses);
4180 :
4181 6379161 : if (!is_eq && abort_if_fail)
4182 : {
4183 0 : fprintf (stderr, "exit_block_uses = ");
4184 0 : df_print_regset (stderr, exit_block_uses);
4185 0 : fprintf (stderr, "df->exit_block_uses = ");
4186 0 : df_print_regset (stderr, df->exit_block_uses);
4187 0 : gcc_assert (0);
4188 : }
4189 :
4190 6379161 : return is_eq;
4191 6379161 : }
4192 :
4193 :
4194 : /* Return true if df_ref information for all insns in all blocks are
4195 : correct and complete. */
4196 :
4197 : void
4198 6379161 : df_scan_verify (void)
4199 : {
4200 6379161 : unsigned int i;
4201 6379161 : basic_block bb;
4202 :
4203 6379161 : if (!df)
4204 0 : return;
4205 :
4206 : /* Verification is a 4 step process. */
4207 :
4208 : /* (1) All of the refs are marked by going through the reg chains. */
4209 932430889 : for (i = 0; i < DF_REG_SIZE (df); i++)
4210 : {
4211 926051728 : gcc_assert (df_reg_chain_mark (DF_REG_DEF_CHAIN (i), i, true, false)
4212 : == DF_REG_DEF_COUNT (i));
4213 926051728 : gcc_assert (df_reg_chain_mark (DF_REG_USE_CHAIN (i), i, false, false)
4214 : == DF_REG_USE_COUNT (i));
4215 926051728 : gcc_assert (df_reg_chain_mark (DF_REG_EQ_USE_CHAIN (i), i, false, true)
4216 : == DF_REG_EQ_USE_COUNT (i));
4217 : }
4218 :
4219 : /* (2) There are various bitmaps whose value may change over the
4220 : course of the compilation. This step recomputes them to make
4221 : sure that they have not slipped out of date. */
4222 6379161 : auto_bitmap regular_block_artificial_uses (&df_bitmap_obstack);
4223 6379161 : auto_bitmap eh_block_artificial_uses (&df_bitmap_obstack);
4224 :
4225 6379161 : df_get_regular_block_artificial_uses (regular_block_artificial_uses);
4226 6379161 : df_get_eh_block_artificial_uses (eh_block_artificial_uses);
4227 :
4228 6379161 : bitmap_ior_into (eh_block_artificial_uses,
4229 6379161 : regular_block_artificial_uses);
4230 :
4231 : /* Check artificial_uses bitmaps didn't change. */
4232 6379161 : gcc_assert (bitmap_equal_p (regular_block_artificial_uses,
4233 : &df->regular_block_artificial_uses));
4234 6379161 : gcc_assert (bitmap_equal_p (eh_block_artificial_uses,
4235 : &df->eh_block_artificial_uses));
4236 :
4237 : /* Verify entry block and exit block. These only verify the bitmaps,
4238 : the refs are verified in df_bb_verify. */
4239 6379161 : df_entry_block_bitmap_verify (true);
4240 6379161 : df_exit_block_bitmap_verify (true);
4241 :
4242 : /* (3) All of the insns in all of the blocks are traversed and the
4243 : marks are cleared both in the artificial refs attached to the
4244 : blocks and the real refs inside the insns. It is a failure to
4245 : clear a mark that has not been set as this means that the ref in
4246 : the block or insn was not in the reg chain. */
4247 :
4248 90048164 : FOR_ALL_BB_FN (bb, cfun)
4249 83669003 : df_bb_verify (bb);
4250 :
4251 : /* (4) See if all reg chains are traversed a second time. This time
4252 : a check is made that the marks are clear. A set mark would be a
4253 : from a reg that is not in any insn or basic block. */
4254 :
4255 932430889 : for (i = 0; i < DF_REG_SIZE (df); i++)
4256 : {
4257 926051728 : df_reg_chain_verify_unmarked (DF_REG_DEF_CHAIN (i));
4258 926051728 : df_reg_chain_verify_unmarked (DF_REG_USE_CHAIN (i));
4259 926051728 : df_reg_chain_verify_unmarked (DF_REG_EQ_USE_CHAIN (i));
4260 : }
4261 6379161 : }
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