Mercurial > hg > CbC > CbC_gcc
annotate gcc/cfg.c @ 145:1830386684a0
gcc-9.2.0
| author | anatofuz |
|---|---|
| date | Thu, 13 Feb 2020 11:34:05 +0900 |
| parents | 84e7813d76e9 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* Control flow graph manipulation code for GNU compiler. |
| 145 | 2 Copyright (C) 1987-2020 Free Software Foundation, Inc. |
| 0 | 3 |
| 4 This file is part of GCC. | |
| 5 | |
| 6 GCC is free software; you can redistribute it and/or modify it under | |
| 7 the terms of the GNU General Public License as published by the Free | |
| 8 Software Foundation; either version 3, or (at your option) any later | |
| 9 version. | |
| 10 | |
| 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
| 17 along with GCC; see the file COPYING3. If not see | |
| 18 <http://www.gnu.org/licenses/>. */ | |
| 19 | |
| 20 /* This file contains low level functions to manipulate the CFG and | |
| 21 analyze it. All other modules should not transform the data structure | |
| 22 directly and use abstraction instead. The file is supposed to be | |
| 23 ordered bottom-up and should not contain any code dependent on a | |
| 24 particular intermediate language (RTL or trees). | |
| 25 | |
| 26 Available functionality: | |
| 27 - Initialization/deallocation | |
| 28 init_flow, clear_edges | |
| 29 - Low level basic block manipulation | |
| 30 alloc_block, expunge_block | |
| 31 - Edge manipulation | |
| 32 make_edge, make_single_succ_edge, cached_make_edge, remove_edge | |
| 33 - Low level edge redirection (without updating instruction chain) | |
| 34 redirect_edge_succ, redirect_edge_succ_nodup, redirect_edge_pred | |
| 35 - Dumping and debugging | |
| 36 dump_flow_info, debug_flow_info, dump_edge_info | |
| 37 - Allocation of AUX fields for basic blocks | |
| 38 alloc_aux_for_blocks, free_aux_for_blocks, alloc_aux_for_block | |
| 39 - clear_bb_flags | |
| 40 - Consistency checking | |
| 41 verify_flow_info | |
| 42 - Dumping and debugging | |
| 43 print_rtl_with_bb, dump_bb, debug_bb, debug_bb_n | |
| 111 | 44 |
| 45 TODO: Document these "Available functionality" functions in the files | |
| 46 that implement them. | |
| 0 | 47 */ |
| 48 | |
| 49 #include "config.h" | |
| 50 #include "system.h" | |
| 51 #include "coretypes.h" | |
| 111 | 52 #include "backend.h" |
| 0 | 53 #include "hard-reg-set.h" |
| 111 | 54 #include "tree.h" |
| 55 #include "cfghooks.h" | |
| 0 | 56 #include "df.h" |
| 111 | 57 #include "cfganal.h" |
| 58 #include "cfgloop.h" /* FIXME: For struct loop. */ | |
| 59 #include "dumpfile.h" | |
| 0 | 60 |
| 61 | |
| 62 | |
| 63 /* Called once at initialization time. */ | |
| 64 | |
| 65 void | |
| 66 init_flow (struct function *the_fun) | |
| 67 { | |
| 68 if (!the_fun->cfg) | |
| 111 | 69 the_fun->cfg = ggc_cleared_alloc<control_flow_graph> (); |
| 70 n_edges_for_fn (the_fun) = 0; | |
| 131 | 71 the_fun->cfg->count_max = profile_count::uninitialized (); |
| 111 | 72 ENTRY_BLOCK_PTR_FOR_FN (the_fun) |
| 73 = alloc_block (); | |
| 74 ENTRY_BLOCK_PTR_FOR_FN (the_fun)->index = ENTRY_BLOCK; | |
| 75 EXIT_BLOCK_PTR_FOR_FN (the_fun) | |
| 76 = alloc_block (); | |
| 77 EXIT_BLOCK_PTR_FOR_FN (the_fun)->index = EXIT_BLOCK; | |
| 78 ENTRY_BLOCK_PTR_FOR_FN (the_fun)->next_bb | |
| 79 = EXIT_BLOCK_PTR_FOR_FN (the_fun); | |
| 80 EXIT_BLOCK_PTR_FOR_FN (the_fun)->prev_bb | |
| 81 = ENTRY_BLOCK_PTR_FOR_FN (the_fun); | |
| 131 | 82 the_fun->cfg->edge_flags_allocated = EDGE_ALL_FLAGS; |
| 83 the_fun->cfg->bb_flags_allocated = BB_ALL_FLAGS; | |
| 0 | 84 } |
| 85 | |
| 86 /* Helper function for remove_edge and clear_edges. Frees edge structure | |
| 111 | 87 without actually removing it from the pred/succ arrays. */ |
| 0 | 88 |
| 89 static void | |
| 111 | 90 free_edge (function *fn, edge e) |
| 0 | 91 { |
| 111 | 92 n_edges_for_fn (fn)--; |
| 0 | 93 ggc_free (e); |
| 94 } | |
| 95 | |
| 96 /* Free the memory associated with the edge structures. */ | |
| 97 | |
| 98 void | |
| 111 | 99 clear_edges (struct function *fn) |
| 0 | 100 { |
| 101 basic_block bb; | |
| 102 edge e; | |
| 103 edge_iterator ei; | |
| 104 | |
| 111 | 105 FOR_EACH_BB_FN (bb, fn) |
| 0 | 106 { |
| 107 FOR_EACH_EDGE (e, ei, bb->succs) | |
| 111 | 108 free_edge (fn, e); |
| 109 vec_safe_truncate (bb->succs, 0); | |
| 110 vec_safe_truncate (bb->preds, 0); | |
| 0 | 111 } |
| 112 | |
| 111 | 113 FOR_EACH_EDGE (e, ei, ENTRY_BLOCK_PTR_FOR_FN (fn)->succs) |
| 114 free_edge (fn, e); | |
| 115 vec_safe_truncate (EXIT_BLOCK_PTR_FOR_FN (fn)->preds, 0); | |
| 116 vec_safe_truncate (ENTRY_BLOCK_PTR_FOR_FN (fn)->succs, 0); | |
| 0 | 117 |
| 111 | 118 gcc_assert (!n_edges_for_fn (fn)); |
| 0 | 119 } |
| 120 | |
| 121 /* Allocate memory for basic_block. */ | |
| 122 | |
| 123 basic_block | |
| 124 alloc_block (void) | |
| 125 { | |
| 126 basic_block bb; | |
| 111 | 127 bb = ggc_cleared_alloc<basic_block_def> (); |
| 128 bb->count = profile_count::uninitialized (); | |
| 0 | 129 return bb; |
| 130 } | |
| 131 | |
| 132 /* Link block B to chain after AFTER. */ | |
| 133 void | |
| 134 link_block (basic_block b, basic_block after) | |
| 135 { | |
| 136 b->next_bb = after->next_bb; | |
| 137 b->prev_bb = after; | |
| 138 after->next_bb = b; | |
| 139 b->next_bb->prev_bb = b; | |
| 140 } | |
| 141 | |
| 142 /* Unlink block B from chain. */ | |
| 143 void | |
| 144 unlink_block (basic_block b) | |
| 145 { | |
| 146 b->next_bb->prev_bb = b->prev_bb; | |
| 147 b->prev_bb->next_bb = b->next_bb; | |
| 148 b->prev_bb = NULL; | |
| 149 b->next_bb = NULL; | |
| 150 } | |
| 151 | |
| 152 /* Sequentially order blocks and compact the arrays. */ | |
| 153 void | |
| 154 compact_blocks (void) | |
| 155 { | |
| 156 int i; | |
| 157 | |
| 111 | 158 SET_BASIC_BLOCK_FOR_FN (cfun, ENTRY_BLOCK, ENTRY_BLOCK_PTR_FOR_FN (cfun)); |
| 159 SET_BASIC_BLOCK_FOR_FN (cfun, EXIT_BLOCK, EXIT_BLOCK_PTR_FOR_FN (cfun)); | |
|
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160 |
| 0 | 161 if (df) |
| 162 df_compact_blocks (); | |
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163 else |
| 0 | 164 { |
| 165 basic_block bb; | |
|
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166 |
| 0 | 167 i = NUM_FIXED_BLOCKS; |
| 111 | 168 FOR_EACH_BB_FN (bb, cfun) |
| 0 | 169 { |
| 111 | 170 SET_BASIC_BLOCK_FOR_FN (cfun, i, bb); |
| 0 | 171 bb->index = i; |
| 172 i++; | |
| 173 } | |
| 111 | 174 gcc_assert (i == n_basic_blocks_for_fn (cfun)); |
| 0 | 175 |
| 111 | 176 for (; i < last_basic_block_for_fn (cfun); i++) |
| 177 SET_BASIC_BLOCK_FOR_FN (cfun, i, NULL); | |
| 0 | 178 } |
| 111 | 179 last_basic_block_for_fn (cfun) = n_basic_blocks_for_fn (cfun); |
| 0 | 180 } |
| 181 | |
| 182 /* Remove block B from the basic block array. */ | |
| 183 | |
| 184 void | |
| 185 expunge_block (basic_block b) | |
| 186 { | |
| 187 unlink_block (b); | |
| 111 | 188 SET_BASIC_BLOCK_FOR_FN (cfun, b->index, NULL); |
| 189 n_basic_blocks_for_fn (cfun)--; | |
| 0 | 190 /* We should be able to ggc_free here, but we are not. |
| 191 The dead SSA_NAMES are left pointing to dead statements that are pointing | |
| 192 to dead basic blocks making garbage collector to die. | |
| 193 We should be able to release all dead SSA_NAMES and at the same time we should | |
| 194 clear out BB pointer of dead statements consistently. */ | |
| 195 } | |
| 196 | |
| 197 /* Connect E to E->src. */ | |
| 198 | |
| 199 static inline void | |
| 200 connect_src (edge e) | |
| 201 { | |
| 111 | 202 vec_safe_push (e->src->succs, e); |
| 0 | 203 df_mark_solutions_dirty (); |
| 204 } | |
| 205 | |
| 206 /* Connect E to E->dest. */ | |
| 207 | |
| 208 static inline void | |
| 209 connect_dest (edge e) | |
| 210 { | |
| 211 basic_block dest = e->dest; | |
| 111 | 212 vec_safe_push (dest->preds, e); |
| 0 | 213 e->dest_idx = EDGE_COUNT (dest->preds) - 1; |
| 214 df_mark_solutions_dirty (); | |
| 215 } | |
| 216 | |
| 217 /* Disconnect edge E from E->src. */ | |
| 218 | |
| 219 static inline void | |
| 220 disconnect_src (edge e) | |
| 221 { | |
| 222 basic_block src = e->src; | |
| 223 edge_iterator ei; | |
| 224 edge tmp; | |
| 225 | |
| 226 for (ei = ei_start (src->succs); (tmp = ei_safe_edge (ei)); ) | |
| 227 { | |
| 228 if (tmp == e) | |
| 229 { | |
| 111 | 230 src->succs->unordered_remove (ei.index); |
| 231 df_mark_solutions_dirty (); | |
| 0 | 232 return; |
| 233 } | |
| 234 else | |
| 235 ei_next (&ei); | |
| 236 } | |
| 237 | |
| 238 gcc_unreachable (); | |
| 239 } | |
| 240 | |
| 241 /* Disconnect edge E from E->dest. */ | |
| 242 | |
| 243 static inline void | |
| 244 disconnect_dest (edge e) | |
| 245 { | |
| 246 basic_block dest = e->dest; | |
| 247 unsigned int dest_idx = e->dest_idx; | |
| 248 | |
| 111 | 249 dest->preds->unordered_remove (dest_idx); |
| 0 | 250 |
| 251 /* If we removed an edge in the middle of the edge vector, we need | |
| 252 to update dest_idx of the edge that moved into the "hole". */ | |
| 253 if (dest_idx < EDGE_COUNT (dest->preds)) | |
| 254 EDGE_PRED (dest, dest_idx)->dest_idx = dest_idx; | |
| 255 df_mark_solutions_dirty (); | |
| 256 } | |
| 257 | |
| 258 /* Create an edge connecting SRC and DEST with flags FLAGS. Return newly | |
| 259 created edge. Use this only if you are sure that this edge can't | |
| 260 possibly already exist. */ | |
| 261 | |
| 262 edge | |
| 263 unchecked_make_edge (basic_block src, basic_block dst, int flags) | |
| 264 { | |
| 265 edge e; | |
| 111 | 266 e = ggc_cleared_alloc<edge_def> (); |
| 267 n_edges_for_fn (cfun)++; | |
| 0 | 268 |
| 111 | 269 e->probability = profile_probability::uninitialized (); |
| 0 | 270 e->src = src; |
| 271 e->dest = dst; | |
| 272 e->flags = flags; | |
| 273 | |
| 274 connect_src (e); | |
| 275 connect_dest (e); | |
| 276 | |
| 277 execute_on_growing_pred (e); | |
| 278 return e; | |
| 279 } | |
| 280 | |
| 281 /* Create an edge connecting SRC and DST with FLAGS optionally using | |
| 282 edge cache CACHE. Return the new edge, NULL if already exist. */ | |
| 283 | |
| 284 edge | |
| 285 cached_make_edge (sbitmap edge_cache, basic_block src, basic_block dst, int flags) | |
| 286 { | |
| 287 if (edge_cache == NULL | |
| 111 | 288 || src == ENTRY_BLOCK_PTR_FOR_FN (cfun) |
| 289 || dst == EXIT_BLOCK_PTR_FOR_FN (cfun)) | |
| 0 | 290 return make_edge (src, dst, flags); |
| 291 | |
| 292 /* Does the requested edge already exist? */ | |
| 111 | 293 if (! bitmap_bit_p (edge_cache, dst->index)) |
| 0 | 294 { |
| 295 /* The edge does not exist. Create one and update the | |
| 296 cache. */ | |
| 111 | 297 bitmap_set_bit (edge_cache, dst->index); |
| 0 | 298 return unchecked_make_edge (src, dst, flags); |
| 299 } | |
| 300 | |
| 301 /* At this point, we know that the requested edge exists. Adjust | |
| 302 flags if necessary. */ | |
| 303 if (flags) | |
| 304 { | |
| 305 edge e = find_edge (src, dst); | |
| 306 e->flags |= flags; | |
| 307 } | |
| 308 | |
| 309 return NULL; | |
| 310 } | |
| 311 | |
| 312 /* Create an edge connecting SRC and DEST with flags FLAGS. Return newly | |
| 313 created edge or NULL if already exist. */ | |
| 314 | |
| 315 edge | |
| 316 make_edge (basic_block src, basic_block dest, int flags) | |
| 317 { | |
| 318 edge e = find_edge (src, dest); | |
| 319 | |
| 320 /* Make sure we don't add duplicate edges. */ | |
| 321 if (e) | |
| 322 { | |
| 323 e->flags |= flags; | |
| 324 return NULL; | |
| 325 } | |
| 326 | |
| 327 return unchecked_make_edge (src, dest, flags); | |
| 328 } | |
| 329 | |
| 330 /* Create an edge connecting SRC to DEST and set probability by knowing | |
| 331 that it is the single edge leaving SRC. */ | |
| 332 | |
| 333 edge | |
| 334 make_single_succ_edge (basic_block src, basic_block dest, int flags) | |
| 335 { | |
| 336 edge e = make_edge (src, dest, flags); | |
| 337 | |
| 111 | 338 e->probability = profile_probability::always (); |
| 0 | 339 return e; |
| 340 } | |
| 341 | |
| 342 /* This function will remove an edge from the flow graph. */ | |
| 343 | |
| 344 void | |
| 345 remove_edge_raw (edge e) | |
| 346 { | |
| 347 remove_predictions_associated_with_edge (e); | |
| 348 execute_on_shrinking_pred (e); | |
| 349 | |
| 350 disconnect_src (e); | |
| 351 disconnect_dest (e); | |
| 352 | |
| 111 | 353 free_edge (cfun, e); |
| 0 | 354 } |
| 355 | |
| 356 /* Redirect an edge's successor from one block to another. */ | |
| 357 | |
| 358 void | |
| 359 redirect_edge_succ (edge e, basic_block new_succ) | |
| 360 { | |
| 361 execute_on_shrinking_pred (e); | |
| 362 | |
| 363 disconnect_dest (e); | |
| 364 | |
| 365 e->dest = new_succ; | |
| 366 | |
| 367 /* Reconnect the edge to the new successor block. */ | |
| 368 connect_dest (e); | |
| 369 | |
| 370 execute_on_growing_pred (e); | |
| 371 } | |
| 372 | |
| 373 /* Redirect an edge's predecessor from one block to another. */ | |
| 374 | |
| 375 void | |
| 376 redirect_edge_pred (edge e, basic_block new_pred) | |
| 377 { | |
| 378 disconnect_src (e); | |
| 379 | |
| 380 e->src = new_pred; | |
| 381 | |
| 382 /* Reconnect the edge to the new predecessor block. */ | |
| 383 connect_src (e); | |
| 384 } | |
| 385 | |
| 111 | 386 /* Clear all basic block flags that do not have to be preserved. */ |
| 0 | 387 void |
| 388 clear_bb_flags (void) | |
| 389 { | |
| 390 basic_block bb; | |
| 131 | 391 int flags_to_preserve = BB_FLAGS_TO_PRESERVE; |
| 392 if (current_loops | |
| 393 && loops_state_satisfies_p (cfun, LOOPS_HAVE_MARKED_IRREDUCIBLE_REGIONS)) | |
| 394 flags_to_preserve |= BB_IRREDUCIBLE_LOOP; | |
| 0 | 395 |
| 111 | 396 FOR_ALL_BB_FN (bb, cfun) |
| 131 | 397 bb->flags &= flags_to_preserve; |
| 0 | 398 } |
| 399 | |
| 400 /* Check the consistency of profile information. We can't do that | |
| 401 in verify_flow_info, as the counts may get invalid for incompletely | |
| 402 solved graphs, later eliminating of conditionals or roundoff errors. | |
| 403 It is still practical to have them reported for debugging of simple | |
| 404 testcases. */ | |
| 111 | 405 static void |
| 406 check_bb_profile (basic_block bb, FILE * file, int indent) | |
| 0 | 407 { |
| 408 edge e; | |
| 409 edge_iterator ei; | |
| 111 | 410 struct function *fun = DECL_STRUCT_FUNCTION (current_function_decl); |
| 411 char *s_indent = (char *) alloca ((size_t) indent + 1); | |
| 412 memset ((void *) s_indent, ' ', (size_t) indent); | |
| 413 s_indent[indent] = '\0'; | |
| 0 | 414 |
| 111 | 415 if (profile_status_for_fn (fun) == PROFILE_ABSENT) |
| 0 | 416 return; |
| 417 | |
| 111 | 418 if (bb != EXIT_BLOCK_PTR_FOR_FN (fun)) |
| 0 | 419 { |
| 111 | 420 bool found = false; |
| 421 profile_probability sum = profile_probability::never (); | |
| 422 int isum = 0; | |
| 423 | |
| 0 | 424 FOR_EACH_EDGE (e, ei, bb->succs) |
| 111 | 425 { |
| 426 if (!(e->flags & (EDGE_EH | EDGE_FAKE))) | |
| 427 found = true; | |
| 428 sum += e->probability; | |
| 429 if (e->probability.initialized_p ()) | |
| 430 isum += e->probability.to_reg_br_prob_base (); | |
| 431 } | |
| 432 /* Only report mismatches for non-EH control flow. If there are only EH | |
| 433 edges it means that the BB ends by noreturn call. Here the control | |
| 434 flow may just terminate. */ | |
| 435 if (found) | |
| 436 { | |
| 437 if (sum.differs_from_p (profile_probability::always ())) | |
| 438 { | |
| 439 fprintf (file, | |
| 440 ";; %sInvalid sum of outgoing probabilities ", | |
| 441 s_indent); | |
| 442 sum.dump (file); | |
| 443 fprintf (file, "\n"); | |
| 444 } | |
| 445 /* Probabilities caps to 100% and thus the previous test will never | |
| 446 fire if the sum of probabilities is too large. */ | |
| 447 else if (isum > REG_BR_PROB_BASE + 100) | |
| 448 { | |
| 449 fprintf (file, | |
| 450 ";; %sInvalid sum of outgoing probabilities %.1f%%\n", | |
| 451 s_indent, isum * 100.0 / REG_BR_PROB_BASE); | |
| 452 } | |
| 453 } | |
| 0 | 454 } |
| 111 | 455 if (bb != ENTRY_BLOCK_PTR_FOR_FN (fun)) |
| 0 | 456 { |
| 131 | 457 profile_count sum = profile_count::zero (); |
| 0 | 458 FOR_EACH_EDGE (e, ei, bb->preds) |
| 131 | 459 sum += e->count (); |
| 460 if (sum.differs_from_p (bb->count)) | |
| 461 { | |
| 462 fprintf (file, ";; %sInvalid sum of incoming counts ", | |
| 463 s_indent); | |
| 464 sum.dump (file); | |
| 465 fprintf (file, ", should be "); | |
| 466 bb->count.dump (file); | |
| 467 fprintf (file, "\n"); | |
| 468 } | |
| 111 | 469 } |
| 470 if (BB_PARTITION (bb) == BB_COLD_PARTITION) | |
| 471 { | |
| 472 /* Warn about inconsistencies in the partitioning that are | |
| 473 currently caused by profile insanities created via optimization. */ | |
| 474 if (!probably_never_executed_bb_p (fun, bb)) | |
| 475 fprintf (file, ";; %sBlock in cold partition with hot count\n", | |
| 476 s_indent); | |
| 0 | 477 FOR_EACH_EDGE (e, ei, bb->preds) |
| 111 | 478 { |
| 479 if (!probably_never_executed_edge_p (fun, e)) | |
| 480 fprintf (file, | |
| 481 ";; %sBlock in cold partition with incoming hot edge\n", | |
| 482 s_indent); | |
| 483 } | |
| 0 | 484 } |
| 485 } | |
| 486 | |
| 487 void | |
| 111 | 488 dump_edge_info (FILE *file, edge e, dump_flags_t flags, int do_succ) |
| 0 | 489 { |
| 490 basic_block side = (do_succ ? e->dest : e->src); | |
| 111 | 491 bool do_details = false; |
| 492 | |
| 493 if ((flags & TDF_DETAILS) != 0 | |
| 494 && (flags & TDF_SLIM) == 0) | |
| 495 do_details = true; | |
| 496 | |
| 497 if (side->index == ENTRY_BLOCK) | |
| 0 | 498 fputs (" ENTRY", file); |
| 111 | 499 else if (side->index == EXIT_BLOCK) |
| 0 | 500 fputs (" EXIT", file); |
| 501 else | |
| 502 fprintf (file, " %d", side->index); | |
| 503 | |
| 111 | 504 if (e->probability.initialized_p () && do_details) |
| 505 { | |
| 506 fprintf (file, " ["); | |
| 507 e->probability.dump (file); | |
| 508 fprintf (file, "] "); | |
| 509 } | |
| 0 | 510 |
| 111 | 511 if (e->count ().initialized_p () && do_details) |
| 0 | 512 { |
|
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513 fputs (" count:", file); |
| 111 | 514 e->count ().dump (file); |
| 0 | 515 } |
| 516 | |
| 111 | 517 if (e->flags && do_details) |
| 0 | 518 { |
| 111 | 519 static const char * const bitnames[] = |
| 520 { | |
| 521 #define DEF_EDGE_FLAG(NAME,IDX) #NAME , | |
| 522 #include "cfg-flags.def" | |
| 523 NULL | |
| 524 #undef DEF_EDGE_FLAG | |
| 525 }; | |
| 526 bool comma = false; | |
| 0 | 527 int i, flags = e->flags; |
| 528 | |
| 111 | 529 gcc_assert (e->flags <= EDGE_ALL_FLAGS); |
| 0 | 530 fputs (" (", file); |
| 531 for (i = 0; flags; i++) | |
| 532 if (flags & (1 << i)) | |
| 533 { | |
| 534 flags &= ~(1 << i); | |
| 535 | |
| 536 if (comma) | |
| 537 fputc (',', file); | |
| 111 | 538 fputs (bitnames[i], file); |
| 539 comma = true; | |
| 0 | 540 } |
| 541 | |
| 542 fputc (')', file); | |
| 543 } | |
| 544 } | |
| 111 | 545 |
| 546 DEBUG_FUNCTION void | |
| 547 debug (edge_def &ref) | |
| 548 { | |
| 145 | 549 fprintf (stderr, "<edge (%d -> %d)>\n", |
| 550 ref.src->index, ref.dest->index); | |
| 551 dump_edge_info (stderr, &ref, TDF_DETAILS, false); | |
| 552 fprintf (stderr, "\n"); | |
| 111 | 553 } |
| 554 | |
| 555 DEBUG_FUNCTION void | |
| 556 debug (edge_def *ptr) | |
| 557 { | |
| 558 if (ptr) | |
| 559 debug (*ptr); | |
| 560 else | |
| 561 fprintf (stderr, "<nil>\n"); | |
| 562 } | |
| 131 | 563 |
| 564 static void | |
| 565 debug_slim (edge e) | |
| 566 { | |
| 567 fprintf (stderr, "<edge 0x%p (%d -> %d)>", (void *) e, | |
| 568 e->src->index, e->dest->index); | |
| 569 } | |
| 570 | |
| 571 DEFINE_DEBUG_VEC (edge) | |
| 572 DEFINE_DEBUG_HASH_SET (edge) | |
| 0 | 573 |
| 574 /* Simple routines to easily allocate AUX fields of basic blocks. */ | |
| 575 | |
| 576 static struct obstack block_aux_obstack; | |
| 577 static void *first_block_aux_obj = 0; | |
| 578 static struct obstack edge_aux_obstack; | |
| 579 static void *first_edge_aux_obj = 0; | |
| 580 | |
| 581 /* Allocate a memory block of SIZE as BB->aux. The obstack must | |
| 582 be first initialized by alloc_aux_for_blocks. */ | |
| 583 | |
|
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|
584 static void |
| 0 | 585 alloc_aux_for_block (basic_block bb, int size) |
| 586 { | |
| 587 /* Verify that aux field is clear. */ | |
| 588 gcc_assert (!bb->aux && first_block_aux_obj); | |
| 589 bb->aux = obstack_alloc (&block_aux_obstack, size); | |
| 590 memset (bb->aux, 0, size); | |
| 591 } | |
| 592 | |
| 593 /* Initialize the block_aux_obstack and if SIZE is nonzero, call | |
| 594 alloc_aux_for_block for each basic block. */ | |
| 595 | |
| 596 void | |
| 597 alloc_aux_for_blocks (int size) | |
| 598 { | |
| 599 static int initialized; | |
| 600 | |
| 601 if (!initialized) | |
| 602 { | |
| 603 gcc_obstack_init (&block_aux_obstack); | |
| 604 initialized = 1; | |
| 605 } | |
| 606 else | |
| 607 /* Check whether AUX data are still allocated. */ | |
| 608 gcc_assert (!first_block_aux_obj); | |
| 609 | |
| 610 first_block_aux_obj = obstack_alloc (&block_aux_obstack, 0); | |
| 611 if (size) | |
| 612 { | |
| 613 basic_block bb; | |
| 614 | |
| 111 | 615 FOR_ALL_BB_FN (bb, cfun) |
| 0 | 616 alloc_aux_for_block (bb, size); |
| 617 } | |
| 618 } | |
| 619 | |
| 620 /* Clear AUX pointers of all blocks. */ | |
| 621 | |
| 622 void | |
| 623 clear_aux_for_blocks (void) | |
| 624 { | |
| 625 basic_block bb; | |
| 626 | |
| 111 | 627 FOR_ALL_BB_FN (bb, cfun) |
| 0 | 628 bb->aux = NULL; |
| 629 } | |
| 630 | |
| 631 /* Free data allocated in block_aux_obstack and clear AUX pointers | |
| 632 of all blocks. */ | |
| 633 | |
| 634 void | |
| 635 free_aux_for_blocks (void) | |
| 636 { | |
| 637 gcc_assert (first_block_aux_obj); | |
| 638 obstack_free (&block_aux_obstack, first_block_aux_obj); | |
| 639 first_block_aux_obj = NULL; | |
| 640 | |
| 641 clear_aux_for_blocks (); | |
| 642 } | |
| 643 | |
| 111 | 644 /* Allocate a memory edge of SIZE as E->aux. The obstack must |
| 0 | 645 be first initialized by alloc_aux_for_edges. */ |
| 646 | |
| 111 | 647 void |
| 0 | 648 alloc_aux_for_edge (edge e, int size) |
| 649 { | |
| 650 /* Verify that aux field is clear. */ | |
| 651 gcc_assert (!e->aux && first_edge_aux_obj); | |
| 652 e->aux = obstack_alloc (&edge_aux_obstack, size); | |
| 653 memset (e->aux, 0, size); | |
| 654 } | |
| 655 | |
| 656 /* Initialize the edge_aux_obstack and if SIZE is nonzero, call | |
| 657 alloc_aux_for_edge for each basic edge. */ | |
| 658 | |
| 659 void | |
| 660 alloc_aux_for_edges (int size) | |
| 661 { | |
| 662 static int initialized; | |
| 663 | |
| 664 if (!initialized) | |
| 665 { | |
| 666 gcc_obstack_init (&edge_aux_obstack); | |
| 667 initialized = 1; | |
| 668 } | |
| 669 else | |
| 670 /* Check whether AUX data are still allocated. */ | |
| 671 gcc_assert (!first_edge_aux_obj); | |
| 672 | |
| 673 first_edge_aux_obj = obstack_alloc (&edge_aux_obstack, 0); | |
| 674 if (size) | |
| 675 { | |
| 676 basic_block bb; | |
| 677 | |
| 111 | 678 FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR_FOR_FN (cfun), |
| 679 EXIT_BLOCK_PTR_FOR_FN (cfun), next_bb) | |
| 0 | 680 { |
| 681 edge e; | |
| 682 edge_iterator ei; | |
| 683 | |
| 684 FOR_EACH_EDGE (e, ei, bb->succs) | |
| 685 alloc_aux_for_edge (e, size); | |
| 686 } | |
| 687 } | |
| 688 } | |
| 689 | |
| 690 /* Clear AUX pointers of all edges. */ | |
| 691 | |
| 692 void | |
| 693 clear_aux_for_edges (void) | |
| 694 { | |
| 695 basic_block bb; | |
| 696 edge e; | |
| 697 | |
| 111 | 698 FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR_FOR_FN (cfun), |
| 699 EXIT_BLOCK_PTR_FOR_FN (cfun), next_bb) | |
| 0 | 700 { |
| 701 edge_iterator ei; | |
| 702 FOR_EACH_EDGE (e, ei, bb->succs) | |
| 703 e->aux = NULL; | |
| 704 } | |
| 705 } | |
| 706 | |
| 707 /* Free data allocated in edge_aux_obstack and clear AUX pointers | |
| 708 of all edges. */ | |
| 709 | |
| 710 void | |
| 711 free_aux_for_edges (void) | |
| 712 { | |
| 713 gcc_assert (first_edge_aux_obj); | |
| 714 obstack_free (&edge_aux_obstack, first_edge_aux_obj); | |
| 715 first_edge_aux_obj = NULL; | |
| 716 | |
| 717 clear_aux_for_edges (); | |
| 718 } | |
| 719 | |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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changeset
|
720 DEBUG_FUNCTION void |
| 0 | 721 debug_bb (basic_block bb) |
| 722 { | |
| 111 | 723 dump_bb (stderr, bb, 0, dump_flags); |
| 0 | 724 } |
| 725 | |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
726 DEBUG_FUNCTION basic_block |
| 0 | 727 debug_bb_n (int n) |
| 728 { | |
| 111 | 729 basic_block bb = BASIC_BLOCK_FOR_FN (cfun, n); |
| 730 debug_bb (bb); | |
| 0 | 731 return bb; |
| 732 } | |
| 733 | |
| 111 | 734 /* Dumps cfg related information about basic block BB to OUTF. |
| 735 If HEADER is true, dump things that appear before the instructions | |
| 736 contained in BB. If FOOTER is true, dump things that appear after. | |
| 737 Flags are the TDF_* masks as documented in dumpfile.h. | |
| 738 NB: With TDF_DETAILS, it is assumed that cfun is available, so | |
| 739 that maybe_hot_bb_p and probably_never_executed_bb_p don't ICE. */ | |
| 0 | 740 |
| 111 | 741 void |
| 742 dump_bb_info (FILE *outf, basic_block bb, int indent, dump_flags_t flags, | |
| 743 bool do_header, bool do_footer) | |
| 0 | 744 { |
| 745 edge_iterator ei; | |
| 111 | 746 edge e; |
| 0 | 747 static const char * const bb_bitnames[] = |
| 748 { | |
| 111 | 749 #define DEF_BASIC_BLOCK_FLAG(NAME,IDX) #NAME , |
| 750 #include "cfg-flags.def" | |
| 751 NULL | |
| 752 #undef DEF_BASIC_BLOCK_FLAG | |
| 0 | 753 }; |
| 754 const unsigned n_bitnames = sizeof (bb_bitnames) / sizeof (char *); | |
| 111 | 755 bool first; |
| 756 char *s_indent = (char *) alloca ((size_t) indent + 1); | |
| 757 memset ((void *) s_indent, ' ', (size_t) indent); | |
| 758 s_indent[indent] = '\0'; | |
| 759 | |
| 760 gcc_assert (bb->flags <= BB_ALL_FLAGS); | |
| 761 | |
| 762 if (do_header) | |
| 763 { | |
| 764 unsigned i; | |
| 765 | |
| 766 fputs (";; ", outf); | |
| 767 fprintf (outf, "%sbasic block %d, loop depth %d", | |
| 768 s_indent, bb->index, bb_loop_depth (bb)); | |
| 769 if (flags & TDF_DETAILS) | |
| 770 { | |
| 771 struct function *fun = DECL_STRUCT_FUNCTION (current_function_decl); | |
| 772 if (bb->count.initialized_p ()) | |
| 773 { | |
| 774 fputs (", count ", outf); | |
| 775 bb->count.dump (outf); | |
| 776 } | |
| 777 if (maybe_hot_bb_p (fun, bb)) | |
| 778 fputs (", maybe hot", outf); | |
| 779 if (probably_never_executed_bb_p (fun, bb)) | |
| 780 fputs (", probably never executed", outf); | |
| 781 } | |
| 782 fputc ('\n', outf); | |
| 783 | |
| 784 if (flags & TDF_DETAILS) | |
| 785 { | |
| 786 check_bb_profile (bb, outf, indent); | |
| 787 fputs (";; ", outf); | |
| 788 fprintf (outf, "%s prev block ", s_indent); | |
| 789 if (bb->prev_bb) | |
| 790 fprintf (outf, "%d", bb->prev_bb->index); | |
| 791 else | |
| 792 fprintf (outf, "(nil)"); | |
| 793 fprintf (outf, ", next block "); | |
| 794 if (bb->next_bb) | |
| 795 fprintf (outf, "%d", bb->next_bb->index); | |
| 796 else | |
| 797 fprintf (outf, "(nil)"); | |
| 0 | 798 |
| 111 | 799 fputs (", flags:", outf); |
| 800 first = true; | |
| 801 for (i = 0; i < n_bitnames; i++) | |
| 802 if (bb->flags & (1 << i)) | |
| 803 { | |
| 804 if (first) | |
| 805 fputs (" (", outf); | |
| 806 else | |
| 807 fputs (", ", outf); | |
| 808 first = false; | |
| 809 fputs (bb_bitnames[i], outf); | |
| 810 } | |
| 811 if (!first) | |
| 812 fputc (')', outf); | |
| 813 fputc ('\n', outf); | |
| 814 } | |
| 0 | 815 |
| 111 | 816 fputs (";; ", outf); |
| 817 fprintf (outf, "%s pred: ", s_indent); | |
| 818 first = true; | |
| 819 FOR_EACH_EDGE (e, ei, bb->preds) | |
| 820 { | |
| 821 if (! first) | |
| 822 { | |
| 823 fputs (";; ", outf); | |
| 824 fprintf (outf, "%s ", s_indent); | |
| 825 } | |
| 826 first = false; | |
| 827 dump_edge_info (outf, e, flags, 0); | |
| 828 fputc ('\n', outf); | |
| 829 } | |
| 830 if (first) | |
| 831 fputc ('\n', outf); | |
| 832 } | |
| 0 | 833 |
| 111 | 834 if (do_footer) |
| 835 { | |
| 836 fputs (";; ", outf); | |
| 837 fprintf (outf, "%s succ: ", s_indent); | |
| 838 first = true; | |
| 839 FOR_EACH_EDGE (e, ei, bb->succs) | |
| 840 { | |
| 841 if (! first) | |
| 842 { | |
| 843 fputs (";; ", outf); | |
| 844 fprintf (outf, "%s ", s_indent); | |
| 845 } | |
| 846 first = false; | |
| 847 dump_edge_info (outf, e, flags, 1); | |
| 848 fputc ('\n', outf); | |
| 849 } | |
| 850 if (first) | |
| 851 fputc ('\n', outf); | |
| 852 } | |
| 0 | 853 } |
| 854 | |
| 855 /* Dumps a brief description of cfg to FILE. */ | |
| 856 | |
| 857 void | |
| 111 | 858 brief_dump_cfg (FILE *file, dump_flags_t flags) |
| 0 | 859 { |
| 860 basic_block bb; | |
| 861 | |
| 111 | 862 FOR_EACH_BB_FN (bb, cfun) |
| 0 | 863 { |
| 111 | 864 dump_bb_info (file, bb, 0, flags & TDF_DETAILS, true, true); |
| 0 | 865 } |
| 866 } | |
| 867 | |
| 131 | 868 /* An edge originally destinating BB of COUNT has been proved to |
| 0 | 869 leave the block by TAKEN_EDGE. Update profile of BB such that edge E can be |
| 870 redirected to destination of TAKEN_EDGE. | |
| 871 | |
| 872 This function may leave the profile inconsistent in the case TAKEN_EDGE | |
| 131 | 873 frequency or count is believed to be lower than COUNT |
| 0 | 874 respectively. */ |
| 875 void | |
| 131 | 876 update_bb_profile_for_threading (basic_block bb, |
| 111 | 877 profile_count count, edge taken_edge) |
| 0 | 878 { |
| 879 edge c; | |
| 111 | 880 profile_probability prob; |
| 0 | 881 edge_iterator ei; |
| 882 | |
| 111 | 883 if (bb->count < count) |
| 0 | 884 { |
| 885 if (dump_file) | |
| 886 fprintf (dump_file, "bb %i count became negative after threading", | |
| 887 bb->index); | |
| 888 } | |
| 111 | 889 bb->count -= count; |
| 890 | |
| 0 | 891 /* Compute the probability of TAKEN_EDGE being reached via threaded edge. |
| 892 Watch for overflows. */ | |
| 131 | 893 if (bb->count.nonzero_p ()) |
| 894 prob = count.probability_in (bb->count); | |
| 0 | 895 else |
| 111 | 896 prob = profile_probability::never (); |
| 0 | 897 if (prob > taken_edge->probability) |
| 898 { | |
| 899 if (dump_file) | |
| 111 | 900 { |
| 901 fprintf (dump_file, "Jump threading proved probability of edge " | |
| 902 "%i->%i too small (it is ", | |
| 903 taken_edge->src->index, taken_edge->dest->index); | |
| 904 taken_edge->probability.dump (dump_file); | |
| 905 fprintf (dump_file, " should be "); | |
| 906 prob.dump (dump_file); | |
| 907 fprintf (dump_file, ")\n"); | |
| 908 } | |
| 909 prob = taken_edge->probability.apply_scale (6, 8); | |
| 0 | 910 } |
| 911 | |
| 912 /* Now rescale the probabilities. */ | |
| 913 taken_edge->probability -= prob; | |
| 111 | 914 prob = prob.invert (); |
| 915 if (prob == profile_probability::never ()) | |
| 0 | 916 { |
| 917 if (dump_file) | |
| 131 | 918 fprintf (dump_file, "Edge probabilities of bb %i has been reset, " |
| 919 "count of block should end up being 0, it is non-zero\n", | |
| 920 bb->index); | |
| 111 | 921 EDGE_SUCC (bb, 0)->probability = profile_probability::guessed_always (); |
| 0 | 922 ei = ei_start (bb->succs); |
| 923 ei_next (&ei); | |
| 924 for (; (c = ei_safe_edge (ei)); ei_next (&ei)) | |
| 111 | 925 c->probability = profile_probability::guessed_never (); |
| 0 | 926 } |
| 111 | 927 else if (!(prob == profile_probability::always ())) |
| 0 | 928 { |
| 929 FOR_EACH_EDGE (c, ei, bb->succs) | |
| 111 | 930 c->probability /= prob; |
| 0 | 931 } |
| 932 | |
| 933 gcc_assert (bb == taken_edge->src); | |
| 934 } | |
| 935 | |
| 936 /* Multiply all frequencies of basic blocks in array BBS of length NBBS | |
| 111 | 937 by NUM/DEN, in profile_count arithmetic. More accurate than previous |
| 938 function but considerably slower. */ | |
| 939 void | |
| 940 scale_bbs_frequencies_profile_count (basic_block *bbs, int nbbs, | |
| 941 profile_count num, profile_count den) | |
| 942 { | |
| 943 int i; | |
| 131 | 944 if (num == profile_count::zero () || den.nonzero_p ()) |
| 945 for (i = 0; i < nbbs; i++) | |
| 111 | 946 bbs[i]->count = bbs[i]->count.apply_scale (num, den); |
| 947 } | |
| 0 | 948 |
| 111 | 949 /* Multiply all frequencies of basic blocks in array BBS of length NBBS |
| 950 by NUM/DEN, in profile_count arithmetic. More accurate than previous | |
| 951 function but considerably slower. */ | |
| 952 void | |
| 953 scale_bbs_frequencies (basic_block *bbs, int nbbs, | |
| 954 profile_probability p) | |
| 955 { | |
| 956 int i; | |
| 957 | |
| 958 for (i = 0; i < nbbs; i++) | |
| 131 | 959 bbs[i]->count = bbs[i]->count.apply_probability (p); |
| 111 | 960 } |
| 961 | |
| 962 /* Helper types for hash tables. */ | |
| 0 | 963 |
| 964 struct htab_bb_copy_original_entry | |
| 965 { | |
| 966 /* Block we are attaching info to. */ | |
| 967 int index1; | |
| 968 /* Index of original or copy (depending on the hashtable) */ | |
| 969 int index2; | |
| 970 }; | |
| 971 | |
| 111 | 972 struct bb_copy_hasher : nofree_ptr_hash <htab_bb_copy_original_entry> |
| 0 | 973 { |
| 111 | 974 static inline hashval_t hash (const htab_bb_copy_original_entry *); |
| 975 static inline bool equal (const htab_bb_copy_original_entry *existing, | |
| 976 const htab_bb_copy_original_entry * candidate); | |
| 977 }; | |
| 0 | 978 |
| 111 | 979 inline hashval_t |
| 980 bb_copy_hasher::hash (const htab_bb_copy_original_entry *data) | |
| 981 { | |
| 0 | 982 return data->index1; |
| 983 } | |
| 111 | 984 |
| 985 inline bool | |
| 986 bb_copy_hasher::equal (const htab_bb_copy_original_entry *data, | |
| 987 const htab_bb_copy_original_entry *data2) | |
| 0 | 988 { |
| 989 return data->index1 == data2->index1; | |
| 990 } | |
| 991 | |
| 111 | 992 /* Data structures used to maintain mapping between basic blocks and |
| 993 copies. */ | |
| 994 static hash_table<bb_copy_hasher> *bb_original; | |
| 995 static hash_table<bb_copy_hasher> *bb_copy; | |
| 996 | |
| 997 /* And between loops and copies. */ | |
| 998 static hash_table<bb_copy_hasher> *loop_copy; | |
| 999 static object_allocator<htab_bb_copy_original_entry> *original_copy_bb_pool; | |
| 1000 | |
| 0 | 1001 /* Initialize the data structures to maintain mapping between blocks |
| 1002 and its copies. */ | |
| 1003 void | |
| 1004 initialize_original_copy_tables (void) | |
| 1005 { | |
| 111 | 1006 original_copy_bb_pool = new object_allocator<htab_bb_copy_original_entry> |
| 1007 ("original_copy"); | |
| 1008 bb_original = new hash_table<bb_copy_hasher> (10); | |
| 1009 bb_copy = new hash_table<bb_copy_hasher> (10); | |
| 1010 loop_copy = new hash_table<bb_copy_hasher> (10); | |
| 1011 } | |
| 1012 | |
| 1013 /* Reset the data structures to maintain mapping between blocks and | |
| 1014 its copies. */ | |
| 1015 | |
| 1016 void | |
| 1017 reset_original_copy_tables (void) | |
| 1018 { | |
| 1019 gcc_assert (original_copy_bb_pool); | |
| 1020 bb_original->empty (); | |
| 1021 bb_copy->empty (); | |
| 1022 loop_copy->empty (); | |
| 0 | 1023 } |
| 1024 | |
| 1025 /* Free the data structures to maintain mapping between blocks and | |
| 1026 its copies. */ | |
| 1027 void | |
| 1028 free_original_copy_tables (void) | |
| 1029 { | |
| 1030 gcc_assert (original_copy_bb_pool); | |
| 111 | 1031 delete bb_copy; |
| 0 | 1032 bb_copy = NULL; |
| 111 | 1033 delete bb_original; |
| 0 | 1034 bb_original = NULL; |
| 111 | 1035 delete loop_copy; |
| 0 | 1036 loop_copy = NULL; |
| 111 | 1037 delete original_copy_bb_pool; |
| 0 | 1038 original_copy_bb_pool = NULL; |
| 1039 } | |
| 1040 | |
| 111 | 1041 /* Return true iff we have had a call to initialize_original_copy_tables |
| 1042 without a corresponding call to free_original_copy_tables. */ | |
| 1043 | |
| 1044 bool | |
| 1045 original_copy_tables_initialized_p (void) | |
| 1046 { | |
| 1047 return original_copy_bb_pool != NULL; | |
| 1048 } | |
| 1049 | |
| 0 | 1050 /* Removes the value associated with OBJ from table TAB. */ |
| 1051 | |
| 1052 static void | |
| 111 | 1053 copy_original_table_clear (hash_table<bb_copy_hasher> *tab, unsigned obj) |
| 0 | 1054 { |
| 111 | 1055 htab_bb_copy_original_entry **slot; |
| 0 | 1056 struct htab_bb_copy_original_entry key, *elt; |
| 1057 | |
| 1058 if (!original_copy_bb_pool) | |
| 1059 return; | |
| 1060 | |
| 1061 key.index1 = obj; | |
| 111 | 1062 slot = tab->find_slot (&key, NO_INSERT); |
| 0 | 1063 if (!slot) |
| 1064 return; | |
| 1065 | |
| 111 | 1066 elt = *slot; |
| 1067 tab->clear_slot (slot); | |
| 1068 original_copy_bb_pool->remove (elt); | |
| 0 | 1069 } |
| 1070 | |
| 1071 /* Sets the value associated with OBJ in table TAB to VAL. | |
| 1072 Do nothing when data structures are not initialized. */ | |
| 1073 | |
| 1074 static void | |
| 111 | 1075 copy_original_table_set (hash_table<bb_copy_hasher> *tab, |
| 1076 unsigned obj, unsigned val) | |
| 0 | 1077 { |
| 1078 struct htab_bb_copy_original_entry **slot; | |
| 1079 struct htab_bb_copy_original_entry key; | |
| 1080 | |
| 1081 if (!original_copy_bb_pool) | |
| 1082 return; | |
| 1083 | |
| 1084 key.index1 = obj; | |
| 111 | 1085 slot = tab->find_slot (&key, INSERT); |
| 0 | 1086 if (!*slot) |
| 1087 { | |
| 111 | 1088 *slot = original_copy_bb_pool->allocate (); |
| 0 | 1089 (*slot)->index1 = obj; |
| 1090 } | |
| 1091 (*slot)->index2 = val; | |
| 1092 } | |
| 1093 | |
| 1094 /* Set original for basic block. Do nothing when data structures are not | |
| 1095 initialized so passes not needing this don't need to care. */ | |
| 1096 void | |
| 1097 set_bb_original (basic_block bb, basic_block original) | |
| 1098 { | |
| 1099 copy_original_table_set (bb_original, bb->index, original->index); | |
| 1100 } | |
| 1101 | |
| 1102 /* Get the original basic block. */ | |
| 1103 basic_block | |
| 1104 get_bb_original (basic_block bb) | |
| 1105 { | |
| 1106 struct htab_bb_copy_original_entry *entry; | |
| 1107 struct htab_bb_copy_original_entry key; | |
| 1108 | |
| 1109 gcc_assert (original_copy_bb_pool); | |
| 1110 | |
| 1111 key.index1 = bb->index; | |
| 111 | 1112 entry = bb_original->find (&key); |
| 0 | 1113 if (entry) |
| 111 | 1114 return BASIC_BLOCK_FOR_FN (cfun, entry->index2); |
| 0 | 1115 else |
| 1116 return NULL; | |
| 1117 } | |
| 1118 | |
| 1119 /* Set copy for basic block. Do nothing when data structures are not | |
| 1120 initialized so passes not needing this don't need to care. */ | |
| 1121 void | |
| 1122 set_bb_copy (basic_block bb, basic_block copy) | |
| 1123 { | |
| 1124 copy_original_table_set (bb_copy, bb->index, copy->index); | |
| 1125 } | |
| 1126 | |
| 1127 /* Get the copy of basic block. */ | |
| 1128 basic_block | |
| 1129 get_bb_copy (basic_block bb) | |
| 1130 { | |
| 1131 struct htab_bb_copy_original_entry *entry; | |
| 1132 struct htab_bb_copy_original_entry key; | |
| 1133 | |
| 1134 gcc_assert (original_copy_bb_pool); | |
| 1135 | |
| 1136 key.index1 = bb->index; | |
| 111 | 1137 entry = bb_copy->find (&key); |
| 0 | 1138 if (entry) |
| 111 | 1139 return BASIC_BLOCK_FOR_FN (cfun, entry->index2); |
| 0 | 1140 else |
| 1141 return NULL; | |
| 1142 } | |
| 1143 | |
| 1144 /* Set copy for LOOP to COPY. Do nothing when data structures are not | |
| 1145 initialized so passes not needing this don't need to care. */ | |
| 1146 | |
| 1147 void | |
| 145 | 1148 set_loop_copy (class loop *loop, class loop *copy) |
| 0 | 1149 { |
| 1150 if (!copy) | |
| 1151 copy_original_table_clear (loop_copy, loop->num); | |
| 1152 else | |
| 1153 copy_original_table_set (loop_copy, loop->num, copy->num); | |
| 1154 } | |
| 1155 | |
| 1156 /* Get the copy of LOOP. */ | |
| 1157 | |
| 145 | 1158 class loop * |
| 1159 get_loop_copy (class loop *loop) | |
| 0 | 1160 { |
| 1161 struct htab_bb_copy_original_entry *entry; | |
| 1162 struct htab_bb_copy_original_entry key; | |
| 1163 | |
| 1164 gcc_assert (original_copy_bb_pool); | |
| 1165 | |
| 1166 key.index1 = loop->num; | |
| 111 | 1167 entry = loop_copy->find (&key); |
| 0 | 1168 if (entry) |
| 111 | 1169 return get_loop (cfun, entry->index2); |
| 0 | 1170 else |
| 1171 return NULL; | |
| 1172 } |