| File: | build/gcc/cfghooks.cc |
| Warning: | line 1417, column 7 Value stored to 'bb' is never read |
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| 1 | /* Hooks for cfg representation specific functions. |
| 2 | Copyright (C) 2003-2023 Free Software Foundation, Inc. |
| 3 | Contributed by Sebastian Pop <s.pop@laposte.net> |
| 4 | |
| 5 | This file is part of GCC. |
| 6 | |
| 7 | GCC is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GCC is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GCC; see the file COPYING3. If not see |
| 19 | <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include "config.h" |
| 22 | #include "system.h" |
| 23 | #include "coretypes.h" |
| 24 | #include "backend.h" |
| 25 | #include "rtl.h" |
| 26 | #include "cfghooks.h" |
| 27 | #include "timevar.h" |
| 28 | #include "pretty-print.h" |
| 29 | #include "diagnostic-core.h" |
| 30 | #include "dumpfile.h" |
| 31 | #include "cfganal.h" |
| 32 | #include "tree.h" |
| 33 | #include "tree-ssa.h" |
| 34 | #include "cfgloop.h" |
| 35 | #include "sreal.h" |
| 36 | #include "profile.h" |
| 37 | |
| 38 | /* Disable warnings about missing quoting in GCC diagnostics. */ |
| 39 | #if __GNUC__4 >= 10 |
| 40 | # pragma GCC diagnostic push |
| 41 | # pragma GCC diagnostic ignored "-Wformat-diag" |
| 42 | #endif |
| 43 | |
| 44 | /* A pointer to one of the hooks containers. */ |
| 45 | static struct cfg_hooks *cfg_hooks; |
| 46 | |
| 47 | /* Initialization of functions specific to the rtl IR. */ |
| 48 | void |
| 49 | rtl_register_cfg_hooks (void) |
| 50 | { |
| 51 | cfg_hooks = &rtl_cfg_hooks; |
| 52 | } |
| 53 | |
| 54 | /* Initialization of functions specific to the rtl IR. */ |
| 55 | void |
| 56 | cfg_layout_rtl_register_cfg_hooks (void) |
| 57 | { |
| 58 | cfg_hooks = &cfg_layout_rtl_cfg_hooks; |
| 59 | } |
| 60 | |
| 61 | /* Initialization of functions specific to the tree IR. */ |
| 62 | |
| 63 | void |
| 64 | gimple_register_cfg_hooks (void) |
| 65 | { |
| 66 | cfg_hooks = &gimple_cfg_hooks; |
| 67 | } |
| 68 | |
| 69 | struct cfg_hooks |
| 70 | get_cfg_hooks (void) |
| 71 | { |
| 72 | return *cfg_hooks; |
| 73 | } |
| 74 | |
| 75 | void |
| 76 | set_cfg_hooks (struct cfg_hooks new_cfg_hooks) |
| 77 | { |
| 78 | *cfg_hooks = new_cfg_hooks; |
| 79 | } |
| 80 | |
| 81 | /* Returns current ir type. */ |
| 82 | |
| 83 | enum ir_type |
| 84 | current_ir_type (void) |
| 85 | { |
| 86 | if (cfg_hooks == &gimple_cfg_hooks) |
| 87 | return IR_GIMPLE; |
| 88 | else if (cfg_hooks == &rtl_cfg_hooks) |
| 89 | return IR_RTL_CFGRTL; |
| 90 | else if (cfg_hooks == &cfg_layout_rtl_cfg_hooks) |
| 91 | return IR_RTL_CFGLAYOUT; |
| 92 | else |
| 93 | gcc_unreachable ()(fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/cfghooks.cc" , 93, __FUNCTION__)); |
| 94 | } |
| 95 | |
| 96 | /* Verify the CFG consistency. |
| 97 | |
| 98 | Currently it does following: checks edge and basic block list correctness |
| 99 | and calls into IL dependent checking then. */ |
| 100 | |
| 101 | DEBUG_FUNCTION__attribute__ ((__used__)) void |
| 102 | verify_flow_info (void) |
| 103 | { |
| 104 | size_t *edge_checksum; |
| 105 | int err = 0; |
| 106 | basic_block bb, last_bb_seen; |
| 107 | basic_block *last_visited; |
| 108 | |
| 109 | timevar_push (TV_CFG_VERIFY); |
| 110 | last_visited = XCNEWVEC (basic_block, last_basic_block_for_fn (cfun))((basic_block *) xcalloc (((((cfun + 0))->cfg->x_last_basic_block )), sizeof (basic_block))); |
| 111 | edge_checksum = XCNEWVEC (size_t, last_basic_block_for_fn (cfun))((size_t *) xcalloc (((((cfun + 0))->cfg->x_last_basic_block )), sizeof (size_t))); |
| 112 | |
| 113 | /* Check bb chain & numbers. */ |
| 114 | last_bb_seen = ENTRY_BLOCK_PTR_FOR_FN (cfun)(((cfun + 0))->cfg->x_entry_block_ptr); |
| 115 | FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR_FOR_FN (cfun)->next_bb, NULL, next_bb)for (bb = (((cfun + 0))->cfg->x_entry_block_ptr)->next_bb ; bb != nullptr; bb = bb->next_bb) |
| 116 | { |
| 117 | if (bb != EXIT_BLOCK_PTR_FOR_FN (cfun)(((cfun + 0))->cfg->x_exit_block_ptr) |
| 118 | && bb != BASIC_BLOCK_FOR_FN (cfun, bb->index)((*(((cfun + 0))->cfg->x_basic_block_info))[(bb->index )])) |
| 119 | { |
| 120 | error ("bb %d on wrong place", bb->index); |
| 121 | err = 1; |
| 122 | } |
| 123 | |
| 124 | if (bb->prev_bb != last_bb_seen) |
| 125 | { |
| 126 | error ("prev_bb of %d should be %d, not %d", |
| 127 | bb->index, last_bb_seen->index, bb->prev_bb->index); |
| 128 | err = 1; |
| 129 | } |
| 130 | |
| 131 | last_bb_seen = bb; |
| 132 | } |
| 133 | |
| 134 | /* Now check the basic blocks (boundaries etc.) */ |
| 135 | FOR_EACH_BB_REVERSE_FN (bb, cfun)for (bb = ((cfun + 0))->cfg->x_exit_block_ptr->prev_bb ; bb != ((cfun + 0))->cfg->x_entry_block_ptr; bb = bb-> prev_bb) |
| 136 | { |
| 137 | int n_fallthru = 0; |
| 138 | edge e; |
| 139 | edge_iterator ei; |
| 140 | |
| 141 | if (bb->loop_father != NULLnullptr && current_loops((cfun + 0)->x_current_loops) == NULLnullptr) |
| 142 | { |
| 143 | error ("verify_flow_info: Block %i has loop_father, but there are no loops", |
| 144 | bb->index); |
| 145 | err = 1; |
| 146 | } |
| 147 | if (bb->loop_father == NULLnullptr && current_loops((cfun + 0)->x_current_loops) != NULLnullptr) |
| 148 | { |
| 149 | error ("verify_flow_info: Block %i lacks loop_father", bb->index); |
| 150 | err = 1; |
| 151 | } |
| 152 | |
| 153 | if (!bb->count.verify ()) |
| 154 | { |
| 155 | error ("verify_flow_info: Wrong count of block %i", bb->index); |
| 156 | err = 1; |
| 157 | } |
| 158 | /* FIXME: Graphite and SLJL and target code still tends to produce |
| 159 | edges with no probability. */ |
| 160 | if (profile_status_for_fn (cfun)(((cfun + 0))->cfg->x_profile_status) >= PROFILE_GUESSED |
| 161 | && !bb->count.initialized_p () && !flag_graphiteglobal_options.x_flag_graphite && 0) |
| 162 | { |
| 163 | error ("verify_flow_info: Missing count of block %i", bb->index); |
| 164 | err = 1; |
| 165 | } |
| 166 | |
| 167 | if (bb->flags & ~cfun(cfun + 0)->cfg->bb_flags_allocated) |
| 168 | { |
| 169 | error ("verify_flow_info: unallocated flag set on BB %d", bb->index); |
| 170 | err = 1; |
| 171 | } |
| 172 | |
| 173 | FOR_EACH_EDGE (e, ei, bb->succs)for ((ei) = ei_start_1 (&((bb->succs))); ei_cond ((ei) , &(e)); ei_next (&(ei))) |
| 174 | { |
| 175 | if (last_visited [e->dest->index] == bb) |
| 176 | { |
| 177 | error ("verify_flow_info: Duplicate edge %i->%i", |
| 178 | e->src->index, e->dest->index); |
| 179 | err = 1; |
| 180 | } |
| 181 | /* FIXME: Graphite and SLJL and target code still tends to produce |
| 182 | edges with no probability. */ |
| 183 | if (profile_status_for_fn (cfun)(((cfun + 0))->cfg->x_profile_status) >= PROFILE_GUESSED |
| 184 | && !e->probability.initialized_p () && !flag_graphiteglobal_options.x_flag_graphite && 0) |
| 185 | { |
| 186 | error ("Uninitialized probability of edge %i->%i", e->src->index, |
| 187 | e->dest->index); |
| 188 | err = 1; |
| 189 | } |
| 190 | if (!e->probability.verify ()) |
| 191 | { |
| 192 | error ("verify_flow_info: Wrong probability of edge %i->%i", |
| 193 | e->src->index, e->dest->index); |
| 194 | err = 1; |
| 195 | } |
| 196 | |
| 197 | last_visited [e->dest->index] = bb; |
| 198 | |
| 199 | if (e->flags & EDGE_FALLTHRU) |
| 200 | n_fallthru++; |
| 201 | |
| 202 | if (e->src != bb) |
| 203 | { |
| 204 | error ("verify_flow_info: Basic block %d succ edge is corrupted", |
| 205 | bb->index); |
| 206 | fprintf (stderrstderr, "Predecessor: "); |
| 207 | dump_edge_info (stderrstderr, e, TDF_DETAILS, 0); |
| 208 | fprintf (stderrstderr, "\nSuccessor: "); |
| 209 | dump_edge_info (stderrstderr, e, TDF_DETAILS, 1); |
| 210 | fprintf (stderrstderr, "\n"); |
| 211 | err = 1; |
| 212 | } |
| 213 | |
| 214 | if (e->flags & ~cfun(cfun + 0)->cfg->edge_flags_allocated) |
| 215 | { |
| 216 | error ("verify_flow_info: unallocated edge flag set on %d -> %d", |
| 217 | e->src->index, e->dest->index); |
| 218 | err = 1; |
| 219 | } |
| 220 | |
| 221 | edge_checksum[e->dest->index] += (size_t) e; |
| 222 | } |
| 223 | if (n_fallthru > 1) |
| 224 | { |
| 225 | error ("wrong amount of branch edges after unconditional jump %i", bb->index); |
| 226 | err = 1; |
| 227 | } |
| 228 | |
| 229 | FOR_EACH_EDGE (e, ei, bb->preds)for ((ei) = ei_start_1 (&((bb->preds))); ei_cond ((ei) , &(e)); ei_next (&(ei))) |
| 230 | { |
| 231 | if (e->dest != bb) |
| 232 | { |
| 233 | error ("basic block %d pred edge is corrupted", bb->index); |
| 234 | fputs ("Predecessor: ", stderrstderr); |
| 235 | dump_edge_info (stderrstderr, e, TDF_DETAILS, 0); |
| 236 | fputs ("\nSuccessor: ", stderrstderr); |
| 237 | dump_edge_info (stderrstderr, e, TDF_DETAILS, 1); |
| 238 | fputc ('\n', stderrstderr); |
| 239 | err = 1; |
| 240 | } |
| 241 | |
| 242 | if (ei.index != e->dest_idx) |
| 243 | { |
| 244 | error ("basic block %d pred edge is corrupted", bb->index); |
| 245 | error ("its dest_idx should be %d, not %d", |
| 246 | ei.index, e->dest_idx); |
| 247 | fputs ("Predecessor: ", stderrstderr); |
| 248 | dump_edge_info (stderrstderr, e, TDF_DETAILS, 0); |
| 249 | fputs ("\nSuccessor: ", stderrstderr); |
| 250 | dump_edge_info (stderrstderr, e, TDF_DETAILS, 1); |
| 251 | fputc ('\n', stderrstderr); |
| 252 | err = 1; |
| 253 | } |
| 254 | |
| 255 | edge_checksum[e->dest->index] -= (size_t) e; |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | /* Complete edge checksumming for ENTRY and EXIT. */ |
| 260 | { |
| 261 | edge e; |
| 262 | edge_iterator ei; |
| 263 | |
| 264 | FOR_EACH_EDGE (e, ei, ENTRY_BLOCK_PTR_FOR_FN (cfun)->succs)for ((ei) = ei_start_1 (&(((((cfun + 0))->cfg->x_entry_block_ptr )->succs))); ei_cond ((ei), &(e)); ei_next (&(ei)) ) |
| 265 | edge_checksum[e->dest->index] += (size_t) e; |
| 266 | |
| 267 | FOR_EACH_EDGE (e, ei, EXIT_BLOCK_PTR_FOR_FN (cfun)->preds)for ((ei) = ei_start_1 (&(((((cfun + 0))->cfg->x_exit_block_ptr )->preds))); ei_cond ((ei), &(e)); ei_next (&(ei)) ) |
| 268 | edge_checksum[e->dest->index] -= (size_t) e; |
| 269 | } |
| 270 | |
| 271 | FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR_FOR_FN (cfun), NULL, next_bb)for (bb = (((cfun + 0))->cfg->x_entry_block_ptr); bb != nullptr; bb = bb->next_bb) |
| 272 | if (edge_checksum[bb->index]) |
| 273 | { |
| 274 | error ("basic block %i edge lists are corrupted", bb->index); |
| 275 | err = 1; |
| 276 | } |
| 277 | |
| 278 | /* Clean up. */ |
| 279 | free (last_visited); |
| 280 | free (edge_checksum); |
| 281 | |
| 282 | if (cfg_hooks->verify_flow_info) |
| 283 | err |= cfg_hooks->verify_flow_info (); |
| 284 | if (err) |
| 285 | internal_error ("verify_flow_info failed"); |
| 286 | timevar_pop (TV_CFG_VERIFY); |
| 287 | } |
| 288 | |
| 289 | /* Print out one basic block BB to file OUTF. INDENT is printed at the |
| 290 | start of each new line. FLAGS are the TDF_* flags in dumpfile.h. |
| 291 | |
| 292 | This function takes care of the purely graph related information. |
| 293 | The cfg hook for the active representation should dump |
| 294 | representation-specific information. */ |
| 295 | |
| 296 | void |
| 297 | dump_bb (FILE *outf, basic_block bb, int indent, dump_flags_t flags) |
| 298 | { |
| 299 | if (flags & TDF_BLOCKS) |
| 300 | dump_bb_info (outf, bb, indent, flags, true, false); |
| 301 | if (cfg_hooks->dump_bb) |
| 302 | cfg_hooks->dump_bb (outf, bb, indent, flags); |
| 303 | if (flags & TDF_BLOCKS) |
| 304 | dump_bb_info (outf, bb, indent, flags, false, true); |
| 305 | fputc ('\n', outf); |
| 306 | } |
| 307 | |
| 308 | DEBUG_FUNCTION__attribute__ ((__used__)) void |
| 309 | debug (basic_block_def &ref) |
| 310 | { |
| 311 | dump_bb (stderrstderr, &ref, 0, TDF_NONE); |
| 312 | } |
| 313 | |
| 314 | DEBUG_FUNCTION__attribute__ ((__used__)) void |
| 315 | debug (basic_block_def *ptr) |
| 316 | { |
| 317 | if (ptr) |
| 318 | debug (*ptr); |
| 319 | else |
| 320 | fprintf (stderrstderr, "<nil>\n"); |
| 321 | } |
| 322 | |
| 323 | static void |
| 324 | debug_slim (basic_block ptr) |
| 325 | { |
| 326 | fprintf (stderrstderr, "<basic_block %p (%d)>", (void *) ptr, ptr->index); |
| 327 | } |
| 328 | |
| 329 | DEFINE_DEBUG_VEC (basic_block_def *)template void debug_helper (vec<basic_block_def *> & ); template void debug_helper (vec<basic_block_def *, va_gc > &); __attribute__ ((__used__)) void debug (vec<basic_block_def *> &ref) { debug_helper <basic_block_def *> (ref ); } __attribute__ ((__used__)) void debug (vec<basic_block_def *> *ptr) { if (ptr) debug (*ptr); else fprintf (stderr, "<nil>\n" ); } __attribute__ ((__used__)) void debug (vec<basic_block_def *, va_gc> &ref) { debug_helper <basic_block_def *> (ref); } __attribute__ ((__used__)) void debug (vec<basic_block_def *, va_gc> *ptr) { if (ptr) debug (*ptr); else fprintf (stderr , "<nil>\n"); } |
| 330 | DEFINE_DEBUG_HASH_SET (basic_block_def *)template void debug_helper (hash_set<basic_block_def *> &); __attribute__ ((__used__)) void debug (hash_set<basic_block_def *> &ref) { debug_helper <basic_block_def *> (ref ); } __attribute__ ((__used__)) void debug (hash_set<basic_block_def *> *ptr) { if (ptr) debug (*ptr); else fprintf (stderr, "<nil>\n" ); } |
| 331 | |
| 332 | /* Dumps basic block BB to pretty-printer PP, for use as a label of |
| 333 | a DOT graph record-node. The implementation of this hook is |
| 334 | expected to write the label to the stream that is attached to PP. |
| 335 | Field separators between instructions are pipe characters printed |
| 336 | verbatim. Instructions should be written with some characters |
| 337 | escaped, using pp_write_text_as_dot_label_to_stream(). */ |
| 338 | |
| 339 | void |
| 340 | dump_bb_for_graph (pretty_printer *pp, basic_block bb) |
| 341 | { |
| 342 | if (!cfg_hooks->dump_bb_for_graph) |
| 343 | internal_error ("%s does not support dump_bb_for_graph", |
| 344 | cfg_hooks->name); |
| 345 | /* TODO: Add pretty printer for counter. */ |
| 346 | if (bb->count.initialized_p ()) |
| 347 | pp_printf (pp, "COUNT:" "%" PRId64"l" "d", bb->count.to_gcov_type ()); |
| 348 | pp_write_text_to_stream (pp); |
| 349 | if (!(dump_flags & TDF_SLIM)) |
| 350 | cfg_hooks->dump_bb_for_graph (pp, bb); |
| 351 | } |
| 352 | |
| 353 | /* Dump the complete CFG to FILE. FLAGS are the TDF_* flags in dumpfile.h. */ |
| 354 | void |
| 355 | dump_flow_info (FILE *file, dump_flags_t flags) |
| 356 | { |
| 357 | basic_block bb; |
| 358 | |
| 359 | fprintf (file, "\n%d basic blocks, %d edges.\n", n_basic_blocks_for_fn (cfun)(((cfun + 0))->cfg->x_n_basic_blocks), |
| 360 | n_edges_for_fn (cfun)(((cfun + 0))->cfg->x_n_edges)); |
| 361 | FOR_ALL_BB_FN (bb, cfun)for (bb = (((cfun + 0))->cfg->x_entry_block_ptr); bb; bb = bb->next_bb) |
| 362 | dump_bb (file, bb, 0, flags); |
| 363 | |
| 364 | putc ('\n', file); |
| 365 | } |
| 366 | |
| 367 | /* Like above, but dump to stderr. To be called from debuggers. */ |
| 368 | void debug_flow_info (void); |
| 369 | DEBUG_FUNCTION__attribute__ ((__used__)) void |
| 370 | debug_flow_info (void) |
| 371 | { |
| 372 | dump_flow_info (stderrstderr, TDF_DETAILS); |
| 373 | } |
| 374 | |
| 375 | /* Redirect edge E to the given basic block DEST and update underlying program |
| 376 | representation. Returns edge representing redirected branch (that may not |
| 377 | be equivalent to E in the case of duplicate edges being removed) or NULL |
| 378 | if edge is not easily redirectable for whatever reason. */ |
| 379 | |
| 380 | edge |
| 381 | redirect_edge_and_branch (edge e, basic_block dest) |
| 382 | { |
| 383 | edge ret; |
| 384 | |
| 385 | if (!cfg_hooks->redirect_edge_and_branch) |
| 386 | internal_error ("%s does not support redirect_edge_and_branch", |
| 387 | cfg_hooks->name); |
| 388 | |
| 389 | ret = cfg_hooks->redirect_edge_and_branch (e, dest); |
| 390 | |
| 391 | /* If RET != E, then either the redirection failed, or the edge E |
| 392 | was removed since RET already lead to the same destination. */ |
| 393 | if (current_loops((cfun + 0)->x_current_loops) != NULLnullptr && ret == e) |
| 394 | rescan_loop_exit (e, false, false); |
| 395 | |
| 396 | return ret; |
| 397 | } |
| 398 | |
| 399 | /* Returns true if it is possible to remove the edge E by redirecting it |
| 400 | to the destination of the other edge going from its source. */ |
| 401 | |
| 402 | bool |
| 403 | can_remove_branch_p (const_edge e) |
| 404 | { |
| 405 | if (!cfg_hooks->can_remove_branch_p) |
| 406 | internal_error ("%s does not support can_remove_branch_p", |
| 407 | cfg_hooks->name); |
| 408 | |
| 409 | if (EDGE_COUNT (e->src->succs)vec_safe_length (e->src->succs) != 2) |
| 410 | return false; |
| 411 | |
| 412 | return cfg_hooks->can_remove_branch_p (e); |
| 413 | } |
| 414 | |
| 415 | /* Removes E, by redirecting it to the destination of the other edge going |
| 416 | from its source. Can_remove_branch_p must be true for E, hence this |
| 417 | operation cannot fail. */ |
| 418 | |
| 419 | void |
| 420 | remove_branch (edge e) |
| 421 | { |
| 422 | edge other; |
| 423 | basic_block src = e->src; |
| 424 | int irr; |
| 425 | |
| 426 | gcc_assert (EDGE_COUNT (e->src->succs) == 2)((void)(!(vec_safe_length (e->src->succs) == 2) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/cfghooks.cc" , 426, __FUNCTION__), 0 : 0)); |
| 427 | |
| 428 | other = EDGE_SUCC (src, EDGE_SUCC (src, 0) == e)(*(src)->succs)[((*(src)->succs)[(0)] == e)]; |
| 429 | irr = other->flags & EDGE_IRREDUCIBLE_LOOP; |
| 430 | |
| 431 | e = redirect_edge_and_branch (e, other->dest); |
| 432 | gcc_assert (e != NULL)((void)(!(e != nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/cfghooks.cc" , 432, __FUNCTION__), 0 : 0)); |
| 433 | |
| 434 | e->flags &= ~EDGE_IRREDUCIBLE_LOOP; |
| 435 | e->flags |= irr; |
| 436 | } |
| 437 | |
| 438 | /* Removes edge E from cfg. Unlike remove_branch, it does not update IL. */ |
| 439 | |
| 440 | void |
| 441 | remove_edge (edge e) |
| 442 | { |
| 443 | if (current_loops((cfun + 0)->x_current_loops) != NULLnullptr) |
| 444 | { |
| 445 | rescan_loop_exit (e, false, true); |
| 446 | |
| 447 | /* Removal of an edge inside an irreducible region or which leads |
| 448 | to an irreducible region can turn the region into a natural loop. |
| 449 | In that case, ask for the loop structure fixups. |
| 450 | |
| 451 | FIXME: Note that LOOPS_HAVE_MARKED_IRREDUCIBLE_REGIONS is not always |
| 452 | set, so always ask for fixups when removing an edge in that case. */ |
| 453 | if (!loops_state_satisfies_p (LOOPS_HAVE_MARKED_IRREDUCIBLE_REGIONS) |
| 454 | || (e->flags & EDGE_IRREDUCIBLE_LOOP) |
| 455 | || (e->dest->flags & BB_IRREDUCIBLE_LOOP)) |
| 456 | loops_state_set (LOOPS_NEED_FIXUP); |
| 457 | } |
| 458 | |
| 459 | /* This is probably not needed, but it doesn't hurt. */ |
| 460 | /* FIXME: This should be called via a remove_edge hook. */ |
| 461 | if (current_ir_type () == IR_GIMPLE) |
| 462 | redirect_edge_var_map_clear (e); |
| 463 | |
| 464 | remove_edge_raw (e); |
| 465 | } |
| 466 | |
| 467 | /* Like redirect_edge_succ but avoid possible duplicate edge. */ |
| 468 | |
| 469 | edge |
| 470 | redirect_edge_succ_nodup (edge e, basic_block new_succ) |
| 471 | { |
| 472 | edge s; |
| 473 | |
| 474 | s = find_edge (e->src, new_succ); |
| 475 | if (s && s != e) |
| 476 | { |
| 477 | s->flags |= e->flags; |
| 478 | s->probability += e->probability; |
| 479 | /* FIXME: This should be called via a hook and only for IR_GIMPLE. */ |
| 480 | redirect_edge_var_map_dup (s, e); |
| 481 | remove_edge (e); |
| 482 | e = s; |
| 483 | } |
| 484 | else |
| 485 | redirect_edge_succ (e, new_succ); |
| 486 | |
| 487 | return e; |
| 488 | } |
| 489 | |
| 490 | /* Redirect the edge E to basic block DEST even if it requires creating |
| 491 | of a new basic block; then it returns the newly created basic block. |
| 492 | Aborts when redirection is impossible. */ |
| 493 | |
| 494 | basic_block |
| 495 | redirect_edge_and_branch_force (edge e, basic_block dest) |
| 496 | { |
| 497 | basic_block ret, src = e->src; |
| 498 | |
| 499 | if (!cfg_hooks->redirect_edge_and_branch_force) |
| 500 | internal_error ("%s does not support redirect_edge_and_branch_force", |
| 501 | cfg_hooks->name); |
| 502 | |
| 503 | if (current_loops((cfun + 0)->x_current_loops) != NULLnullptr) |
| 504 | rescan_loop_exit (e, false, true); |
| 505 | |
| 506 | ret = cfg_hooks->redirect_edge_and_branch_force (e, dest); |
| 507 | |
| 508 | if (ret != NULLnullptr && dom_info_available_p (CDI_DOMINATORS)) |
| 509 | set_immediate_dominator (CDI_DOMINATORS, ret, src); |
| 510 | |
| 511 | if (current_loops((cfun + 0)->x_current_loops) != NULLnullptr) |
| 512 | { |
| 513 | if (ret != NULLnullptr) |
| 514 | { |
| 515 | class loop *loop |
| 516 | = find_common_loop (single_pred (ret)->loop_father, |
| 517 | single_succ (ret)->loop_father); |
| 518 | add_bb_to_loop (ret, loop); |
| 519 | } |
| 520 | else if (find_edge (src, dest) == e) |
| 521 | rescan_loop_exit (e, true, false); |
| 522 | } |
| 523 | |
| 524 | return ret; |
| 525 | } |
| 526 | |
| 527 | /* Splits basic block BB after the specified instruction I (but at least after |
| 528 | the labels). If I is NULL, splits just after labels. The newly created edge |
| 529 | is returned. The new basic block is created just after the old one. */ |
| 530 | |
| 531 | static edge |
| 532 | split_block_1 (basic_block bb, void *i) |
| 533 | { |
| 534 | basic_block new_bb; |
| 535 | edge res; |
| 536 | |
| 537 | if (!cfg_hooks->split_block) |
| 538 | internal_error ("%s does not support split_block", cfg_hooks->name); |
| 539 | |
| 540 | new_bb = cfg_hooks->split_block (bb, i); |
| 541 | if (!new_bb) |
| 542 | return NULLnullptr; |
| 543 | |
| 544 | new_bb->count = bb->count; |
| 545 | |
| 546 | if (dom_info_available_p (CDI_DOMINATORS)) |
| 547 | { |
| 548 | redirect_immediate_dominators (CDI_DOMINATORS, bb, new_bb); |
| 549 | set_immediate_dominator (CDI_DOMINATORS, new_bb, bb); |
| 550 | } |
| 551 | |
| 552 | if (current_loops((cfun + 0)->x_current_loops) != NULLnullptr) |
| 553 | { |
| 554 | edge_iterator ei; |
| 555 | edge e; |
| 556 | add_bb_to_loop (new_bb, bb->loop_father); |
| 557 | /* Identify all loops bb may have been the latch of and adjust them. */ |
| 558 | FOR_EACH_EDGE (e, ei, new_bb->succs)for ((ei) = ei_start_1 (&((new_bb->succs))); ei_cond ( (ei), &(e)); ei_next (&(ei))) |
| 559 | if (e->dest->loop_father->latch == bb) |
| 560 | e->dest->loop_father->latch = new_bb; |
| 561 | } |
| 562 | |
| 563 | res = make_single_succ_edge (bb, new_bb, EDGE_FALLTHRU); |
| 564 | |
| 565 | if (bb->flags & BB_IRREDUCIBLE_LOOP) |
| 566 | { |
| 567 | new_bb->flags |= BB_IRREDUCIBLE_LOOP; |
| 568 | res->flags |= EDGE_IRREDUCIBLE_LOOP; |
| 569 | } |
| 570 | |
| 571 | return res; |
| 572 | } |
| 573 | |
| 574 | edge |
| 575 | split_block (basic_block bb, gimple *i) |
| 576 | { |
| 577 | return split_block_1 (bb, i); |
| 578 | } |
| 579 | |
| 580 | edge |
| 581 | split_block (basic_block bb, rtx i) |
| 582 | { |
| 583 | return split_block_1 (bb, i); |
| 584 | } |
| 585 | |
| 586 | /* Splits block BB just after labels. The newly created edge is returned. */ |
| 587 | |
| 588 | edge |
| 589 | split_block_after_labels (basic_block bb) |
| 590 | { |
| 591 | return split_block_1 (bb, NULLnullptr); |
| 592 | } |
| 593 | |
| 594 | /* Moves block BB immediately after block AFTER. Returns false if the |
| 595 | movement was impossible. */ |
| 596 | |
| 597 | bool |
| 598 | move_block_after (basic_block bb, basic_block after) |
| 599 | { |
| 600 | bool ret; |
| 601 | |
| 602 | if (!cfg_hooks->move_block_after) |
| 603 | internal_error ("%s does not support move_block_after", cfg_hooks->name); |
| 604 | |
| 605 | ret = cfg_hooks->move_block_after (bb, after); |
| 606 | |
| 607 | return ret; |
| 608 | } |
| 609 | |
| 610 | /* Deletes the basic block BB. */ |
| 611 | |
| 612 | void |
| 613 | delete_basic_block (basic_block bb) |
| 614 | { |
| 615 | if (!cfg_hooks->delete_basic_block) |
| 616 | internal_error ("%s does not support delete_basic_block", cfg_hooks->name); |
| 617 | |
| 618 | cfg_hooks->delete_basic_block (bb); |
| 619 | |
| 620 | if (current_loops((cfun + 0)->x_current_loops) != NULLnullptr) |
| 621 | { |
| 622 | class loop *loop = bb->loop_father; |
| 623 | |
| 624 | /* If we remove the header or the latch of a loop, mark the loop for |
| 625 | removal. */ |
| 626 | if (loop->latch == bb |
| 627 | || loop->header == bb) |
| 628 | mark_loop_for_removal (loop); |
| 629 | |
| 630 | remove_bb_from_loops (bb); |
| 631 | } |
| 632 | |
| 633 | /* Remove the edges into and out of this block. Note that there may |
| 634 | indeed be edges in, if we are removing an unreachable loop. */ |
| 635 | while (EDGE_COUNT (bb->preds)vec_safe_length (bb->preds) != 0) |
| 636 | remove_edge (EDGE_PRED (bb, 0)(*(bb)->preds)[(0)]); |
| 637 | while (EDGE_COUNT (bb->succs)vec_safe_length (bb->succs) != 0) |
| 638 | remove_edge (EDGE_SUCC (bb, 0)(*(bb)->succs)[(0)]); |
| 639 | |
| 640 | if (dom_info_available_p (CDI_DOMINATORS)) |
| 641 | delete_from_dominance_info (CDI_DOMINATORS, bb); |
| 642 | if (dom_info_available_p (CDI_POST_DOMINATORS)) |
| 643 | delete_from_dominance_info (CDI_POST_DOMINATORS, bb); |
| 644 | |
| 645 | /* Remove the basic block from the array. */ |
| 646 | expunge_block (bb); |
| 647 | } |
| 648 | |
| 649 | /* Splits edge E and returns the newly created basic block. */ |
| 650 | |
| 651 | basic_block |
| 652 | split_edge (edge e) |
| 653 | { |
| 654 | basic_block ret; |
| 655 | profile_count count = e->count (); |
| 656 | edge f; |
| 657 | bool irr = (e->flags & EDGE_IRREDUCIBLE_LOOP) != 0; |
| 658 | bool back = (e->flags & EDGE_DFS_BACK) != 0; |
| 659 | class loop *loop; |
| 660 | basic_block src = e->src, dest = e->dest; |
| 661 | |
| 662 | if (!cfg_hooks->split_edge) |
| 663 | internal_error ("%s does not support split_edge", cfg_hooks->name); |
| 664 | |
| 665 | if (current_loops((cfun + 0)->x_current_loops) != NULLnullptr) |
| 666 | rescan_loop_exit (e, false, true); |
| 667 | |
| 668 | ret = cfg_hooks->split_edge (e); |
| 669 | ret->count = count; |
| 670 | single_succ_edge (ret)->probability = profile_probability::always (); |
| 671 | |
| 672 | if (irr) |
| 673 | { |
| 674 | ret->flags |= BB_IRREDUCIBLE_LOOP; |
| 675 | single_pred_edge (ret)->flags |= EDGE_IRREDUCIBLE_LOOP; |
| 676 | single_succ_edge (ret)->flags |= EDGE_IRREDUCIBLE_LOOP; |
| 677 | } |
| 678 | if (back) |
| 679 | { |
| 680 | single_pred_edge (ret)->flags &= ~EDGE_DFS_BACK; |
| 681 | single_succ_edge (ret)->flags |= EDGE_DFS_BACK; |
| 682 | } |
| 683 | |
| 684 | if (dom_info_available_p (CDI_DOMINATORS)) |
| 685 | set_immediate_dominator (CDI_DOMINATORS, ret, single_pred (ret)); |
| 686 | |
| 687 | if (dom_info_state (CDI_DOMINATORS) >= DOM_NO_FAST_QUERY) |
| 688 | { |
| 689 | /* There are two cases: |
| 690 | |
| 691 | If the immediate dominator of e->dest is not e->src, it |
| 692 | remains unchanged. |
| 693 | |
| 694 | If immediate dominator of e->dest is e->src, it may become |
| 695 | ret, provided that all other predecessors of e->dest are |
| 696 | dominated by e->dest. */ |
| 697 | |
| 698 | if (get_immediate_dominator (CDI_DOMINATORS, single_succ (ret)) |
| 699 | == single_pred (ret)) |
| 700 | { |
| 701 | edge_iterator ei; |
| 702 | FOR_EACH_EDGE (f, ei, single_succ (ret)->preds)for ((ei) = ei_start_1 (&((single_succ (ret)->preds))) ; ei_cond ((ei), &(f)); ei_next (&(ei))) |
| 703 | { |
| 704 | if (f == single_succ_edge (ret)) |
| 705 | continue; |
| 706 | |
| 707 | if (!dominated_by_p (CDI_DOMINATORS, f->src, |
| 708 | single_succ (ret))) |
| 709 | break; |
| 710 | } |
| 711 | |
| 712 | if (!f) |
| 713 | set_immediate_dominator (CDI_DOMINATORS, single_succ (ret), ret); |
| 714 | } |
| 715 | } |
| 716 | |
| 717 | if (current_loops((cfun + 0)->x_current_loops) != NULLnullptr) |
| 718 | { |
| 719 | loop = find_common_loop (src->loop_father, dest->loop_father); |
| 720 | add_bb_to_loop (ret, loop); |
| 721 | |
| 722 | /* If we split the latch edge of loop adjust the latch block. */ |
| 723 | if (loop->latch == src |
| 724 | && loop->header == dest) |
| 725 | loop->latch = ret; |
| 726 | } |
| 727 | |
| 728 | return ret; |
| 729 | } |
| 730 | |
| 731 | /* Creates a new basic block just after the basic block AFTER. |
| 732 | HEAD and END are the first and the last statement belonging |
| 733 | to the block. If both are NULL, an empty block is created. */ |
| 734 | |
| 735 | static basic_block |
| 736 | create_basic_block_1 (void *head, void *end, basic_block after) |
| 737 | { |
| 738 | basic_block ret; |
| 739 | |
| 740 | if (!cfg_hooks->create_basic_block) |
| 741 | internal_error ("%s does not support create_basic_block", cfg_hooks->name); |
| 742 | |
| 743 | ret = cfg_hooks->create_basic_block (head, end, after); |
| 744 | |
| 745 | if (dom_info_available_p (CDI_DOMINATORS)) |
| 746 | add_to_dominance_info (CDI_DOMINATORS, ret); |
| 747 | if (dom_info_available_p (CDI_POST_DOMINATORS)) |
| 748 | add_to_dominance_info (CDI_POST_DOMINATORS, ret); |
| 749 | |
| 750 | return ret; |
| 751 | } |
| 752 | |
| 753 | basic_block |
| 754 | create_basic_block (gimple_seq seq, basic_block after) |
| 755 | { |
| 756 | return create_basic_block_1 (seq, NULLnullptr, after); |
| 757 | } |
| 758 | |
| 759 | basic_block |
| 760 | create_basic_block (rtx head, rtx end, basic_block after) |
| 761 | { |
| 762 | return create_basic_block_1 (head, end, after); |
| 763 | } |
| 764 | |
| 765 | |
| 766 | /* Creates an empty basic block just after basic block AFTER. */ |
| 767 | |
| 768 | basic_block |
| 769 | create_empty_bb (basic_block after) |
| 770 | { |
| 771 | return create_basic_block_1 (NULLnullptr, NULLnullptr, after); |
| 772 | } |
| 773 | |
| 774 | /* Checks whether we may merge blocks BB1 and BB2. */ |
| 775 | |
| 776 | bool |
| 777 | can_merge_blocks_p (basic_block bb1, basic_block bb2) |
| 778 | { |
| 779 | bool ret; |
| 780 | |
| 781 | if (!cfg_hooks->can_merge_blocks_p) |
| 782 | internal_error ("%s does not support can_merge_blocks_p", cfg_hooks->name); |
| 783 | |
| 784 | ret = cfg_hooks->can_merge_blocks_p (bb1, bb2); |
| 785 | |
| 786 | return ret; |
| 787 | } |
| 788 | |
| 789 | void |
| 790 | predict_edge (edge e, enum br_predictor predictor, int probability) |
| 791 | { |
| 792 | if (!cfg_hooks->predict_edge) |
| 793 | internal_error ("%s does not support predict_edge", cfg_hooks->name); |
| 794 | |
| 795 | cfg_hooks->predict_edge (e, predictor, probability); |
| 796 | } |
| 797 | |
| 798 | bool |
| 799 | predicted_by_p (const_basic_block bb, enum br_predictor predictor) |
| 800 | { |
| 801 | if (!cfg_hooks->predict_edge) |
| 802 | internal_error ("%s does not support predicted_by_p", cfg_hooks->name); |
| 803 | |
| 804 | return cfg_hooks->predicted_by_p (bb, predictor); |
| 805 | } |
| 806 | |
| 807 | /* Merges basic block B into basic block A. */ |
| 808 | |
| 809 | void |
| 810 | merge_blocks (basic_block a, basic_block b) |
| 811 | { |
| 812 | edge e; |
| 813 | edge_iterator ei; |
| 814 | |
| 815 | if (!cfg_hooks->merge_blocks) |
| 816 | internal_error ("%s does not support merge_blocks", cfg_hooks->name); |
| 817 | |
| 818 | cfg_hooks->merge_blocks (a, b); |
| 819 | |
| 820 | if (current_loops((cfun + 0)->x_current_loops) != NULLnullptr) |
| 821 | { |
| 822 | /* If the block we merge into is a loop header do nothing unless ... */ |
| 823 | if (a->loop_father->header == a) |
| 824 | { |
| 825 | /* ... we merge two loop headers, in which case we kill |
| 826 | the inner loop. */ |
| 827 | if (b->loop_father->header == b) |
| 828 | mark_loop_for_removal (b->loop_father); |
| 829 | } |
| 830 | /* If we merge a loop header into its predecessor, update the loop |
| 831 | structure. */ |
| 832 | else if (b->loop_father->header == b) |
| 833 | { |
| 834 | remove_bb_from_loops (a); |
| 835 | add_bb_to_loop (a, b->loop_father); |
| 836 | a->loop_father->header = a; |
| 837 | } |
| 838 | /* If we merge a loop latch into its predecessor, update the loop |
| 839 | structure. */ |
| 840 | if (b->loop_father->latch |
| 841 | && b->loop_father->latch == b) |
| 842 | b->loop_father->latch = a; |
| 843 | remove_bb_from_loops (b); |
| 844 | } |
| 845 | |
| 846 | /* Normally there should only be one successor of A and that is B, but |
| 847 | partway though the merge of blocks for conditional_execution we'll |
| 848 | be merging a TEST block with THEN and ELSE successors. Free the |
| 849 | whole lot of them and hope the caller knows what they're doing. */ |
| 850 | |
| 851 | while (EDGE_COUNT (a->succs)vec_safe_length (a->succs) != 0) |
| 852 | remove_edge (EDGE_SUCC (a, 0)(*(a)->succs)[(0)]); |
| 853 | |
| 854 | /* Adjust the edges out of B for the new owner. */ |
| 855 | FOR_EACH_EDGE (e, ei, b->succs)for ((ei) = ei_start_1 (&((b->succs))); ei_cond ((ei), &(e)); ei_next (&(ei))) |
| 856 | { |
| 857 | e->src = a; |
| 858 | if (current_loops((cfun + 0)->x_current_loops) != NULLnullptr) |
| 859 | { |
| 860 | /* If b was a latch, a now is. */ |
| 861 | if (e->dest->loop_father->latch == b) |
| 862 | e->dest->loop_father->latch = a; |
| 863 | rescan_loop_exit (e, true, false); |
| 864 | } |
| 865 | } |
| 866 | a->succs = b->succs; |
| 867 | a->flags |= b->flags; |
| 868 | |
| 869 | /* B hasn't quite yet ceased to exist. Attempt to prevent mishap. */ |
| 870 | b->preds = b->succs = NULLnullptr; |
| 871 | |
| 872 | if (dom_info_available_p (CDI_DOMINATORS)) |
| 873 | redirect_immediate_dominators (CDI_DOMINATORS, b, a); |
| 874 | |
| 875 | if (dom_info_available_p (CDI_DOMINATORS)) |
| 876 | delete_from_dominance_info (CDI_DOMINATORS, b); |
| 877 | if (dom_info_available_p (CDI_POST_DOMINATORS)) |
| 878 | delete_from_dominance_info (CDI_POST_DOMINATORS, b); |
| 879 | |
| 880 | expunge_block (b); |
| 881 | } |
| 882 | |
| 883 | /* Split BB into entry part and the rest (the rest is the newly created block). |
| 884 | Redirect those edges for that REDIRECT_EDGE_P returns true to the entry |
| 885 | part. Returns the edge connecting the entry part to the rest. */ |
| 886 | |
| 887 | edge |
| 888 | make_forwarder_block (basic_block bb, bool (*redirect_edge_p) (edge), |
| 889 | void (*new_bb_cbk) (basic_block)) |
| 890 | { |
| 891 | edge e, fallthru; |
| 892 | edge_iterator ei; |
| 893 | basic_block dummy, jump; |
| 894 | class loop *loop, *ploop, *cloop; |
| 895 | |
| 896 | if (!cfg_hooks->make_forwarder_block) |
| 897 | internal_error ("%s does not support make_forwarder_block", |
| 898 | cfg_hooks->name); |
| 899 | |
| 900 | fallthru = split_block_after_labels (bb); |
| 901 | dummy = fallthru->src; |
| 902 | dummy->count = profile_count::zero (); |
| 903 | bb = fallthru->dest; |
| 904 | |
| 905 | /* Redirect back edges we want to keep. */ |
| 906 | for (ei = ei_start (dummy->preds)ei_start_1 (&(dummy->preds)); (e = ei_safe_edge (ei)); ) |
| 907 | { |
| 908 | basic_block e_src; |
| 909 | |
| 910 | if (redirect_edge_p (e)) |
| 911 | { |
| 912 | dummy->count += e->count (); |
| 913 | ei_next (&ei); |
| 914 | continue; |
| 915 | } |
| 916 | |
| 917 | e_src = e->src; |
| 918 | jump = redirect_edge_and_branch_force (e, bb); |
| 919 | if (jump != NULLnullptr) |
| 920 | { |
| 921 | /* If we redirected the loop latch edge, the JUMP block now acts like |
| 922 | the new latch of the loop. */ |
| 923 | if (current_loops((cfun + 0)->x_current_loops) != NULLnullptr |
| 924 | && dummy->loop_father != NULLnullptr |
| 925 | && dummy->loop_father->header == dummy |
| 926 | && dummy->loop_father->latch == e_src) |
| 927 | dummy->loop_father->latch = jump; |
| 928 | |
| 929 | if (new_bb_cbk != NULLnullptr) |
| 930 | new_bb_cbk (jump); |
| 931 | } |
| 932 | } |
| 933 | |
| 934 | if (dom_info_available_p (CDI_DOMINATORS)) |
| 935 | { |
| 936 | vec<basic_block> doms_to_fix; |
| 937 | doms_to_fix.create (2); |
| 938 | doms_to_fix.quick_push (dummy); |
| 939 | doms_to_fix.quick_push (bb); |
| 940 | iterate_fix_dominators (CDI_DOMINATORS, doms_to_fix, false); |
| 941 | doms_to_fix.release (); |
| 942 | } |
| 943 | |
| 944 | if (current_loops((cfun + 0)->x_current_loops) != NULLnullptr) |
| 945 | { |
| 946 | /* If we do not split a loop header, then both blocks belong to the |
| 947 | same loop. In case we split loop header and do not redirect the |
| 948 | latch edge to DUMMY, then DUMMY belongs to the outer loop, and |
| 949 | BB becomes the new header. If latch is not recorded for the loop, |
| 950 | we leave this updating on the caller (this may only happen during |
| 951 | loop analysis). */ |
| 952 | loop = dummy->loop_father; |
| 953 | if (loop->header == dummy |
| 954 | && loop->latch != NULLnullptr |
| 955 | && find_edge (loop->latch, dummy) == NULLnullptr) |
| 956 | { |
| 957 | remove_bb_from_loops (dummy); |
| 958 | loop->header = bb; |
| 959 | |
| 960 | cloop = loop; |
| 961 | FOR_EACH_EDGE (e, ei, dummy->preds)for ((ei) = ei_start_1 (&((dummy->preds))); ei_cond (( ei), &(e)); ei_next (&(ei))) |
| 962 | { |
| 963 | cloop = find_common_loop (cloop, e->src->loop_father); |
| 964 | } |
| 965 | add_bb_to_loop (dummy, cloop); |
| 966 | } |
| 967 | |
| 968 | /* In case we split loop latch, update it. */ |
| 969 | for (ploop = loop; ploop; ploop = loop_outer (ploop)) |
| 970 | if (ploop->latch == dummy) |
| 971 | ploop->latch = bb; |
| 972 | } |
| 973 | |
| 974 | cfg_hooks->make_forwarder_block (fallthru); |
| 975 | |
| 976 | return fallthru; |
| 977 | } |
| 978 | |
| 979 | /* Try to make the edge fallthru. */ |
| 980 | |
| 981 | void |
| 982 | tidy_fallthru_edge (edge e) |
| 983 | { |
| 984 | if (cfg_hooks->tidy_fallthru_edge) |
| 985 | cfg_hooks->tidy_fallthru_edge (e); |
| 986 | } |
| 987 | |
| 988 | /* Fix up edges that now fall through, or rather should now fall through |
| 989 | but previously required a jump around now deleted blocks. Simplify |
| 990 | the search by only examining blocks numerically adjacent, since this |
| 991 | is how they were created. |
| 992 | |
| 993 | ??? This routine is currently RTL specific. */ |
| 994 | |
| 995 | void |
| 996 | tidy_fallthru_edges (void) |
| 997 | { |
| 998 | basic_block b, c; |
| 999 | |
| 1000 | if (!cfg_hooks->tidy_fallthru_edge) |
| 1001 | return; |
| 1002 | |
| 1003 | if (ENTRY_BLOCK_PTR_FOR_FN (cfun)(((cfun + 0))->cfg->x_entry_block_ptr)->next_bb == EXIT_BLOCK_PTR_FOR_FN (cfun)(((cfun + 0))->cfg->x_exit_block_ptr)) |
| 1004 | return; |
| 1005 | |
| 1006 | FOR_BB_BETWEEN (b, ENTRY_BLOCK_PTR_FOR_FN (cfun)->next_bb,for (b = (((cfun + 0))->cfg->x_entry_block_ptr)->next_bb ; b != (((cfun + 0))->cfg->x_exit_block_ptr)->prev_bb ; b = b->next_bb) |
| 1007 | EXIT_BLOCK_PTR_FOR_FN (cfun)->prev_bb, next_bb)for (b = (((cfun + 0))->cfg->x_entry_block_ptr)->next_bb ; b != (((cfun + 0))->cfg->x_exit_block_ptr)->prev_bb ; b = b->next_bb) |
| 1008 | { |
| 1009 | edge s; |
| 1010 | |
| 1011 | c = b->next_bb; |
| 1012 | |
| 1013 | /* We care about simple conditional or unconditional jumps with |
| 1014 | a single successor. |
| 1015 | |
| 1016 | If we had a conditional branch to the next instruction when |
| 1017 | CFG was built, then there will only be one out edge for the |
| 1018 | block which ended with the conditional branch (since we do |
| 1019 | not create duplicate edges). |
| 1020 | |
| 1021 | Furthermore, the edge will be marked as a fallthru because we |
| 1022 | merge the flags for the duplicate edges. So we do not want to |
| 1023 | check that the edge is not a FALLTHRU edge. */ |
| 1024 | |
| 1025 | if (single_succ_p (b)) |
| 1026 | { |
| 1027 | s = single_succ_edge (b); |
| 1028 | if (! (s->flags & EDGE_COMPLEX(EDGE_ABNORMAL | EDGE_ABNORMAL_CALL | EDGE_EH | EDGE_PRESERVE )) |
| 1029 | && s->dest == c |
| 1030 | && !(JUMP_P (BB_END (b))(((enum rtx_code) ((b)->il.x.rtl->end_)->code) == JUMP_INSN ) && CROSSING_JUMP_P (BB_END (b))(__extension__ ({ __typeof (((b)->il.x.rtl->end_)) const _rtx = (((b)->il.x.rtl->end_)); if (((enum rtx_code) ( _rtx)->code) != JUMP_INSN) rtl_check_failed_flag ("CROSSING_JUMP_P" , _rtx, "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/cfghooks.cc" , 1030, __FUNCTION__); _rtx; })->jump))) |
| 1031 | tidy_fallthru_edge (s); |
| 1032 | } |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | /* Edge E is assumed to be fallthru edge. Emit needed jump instruction |
| 1037 | (and possibly create new basic block) to make edge non-fallthru. |
| 1038 | Return newly created BB or NULL if none. */ |
| 1039 | |
| 1040 | basic_block |
| 1041 | force_nonfallthru (edge e) |
| 1042 | { |
| 1043 | basic_block ret, src = e->src; |
| 1044 | |
| 1045 | if (!cfg_hooks->force_nonfallthru) |
| 1046 | internal_error ("%s does not support force_nonfallthru", |
| 1047 | cfg_hooks->name); |
| 1048 | |
| 1049 | ret = cfg_hooks->force_nonfallthru (e); |
| 1050 | if (ret != NULLnullptr) |
| 1051 | { |
| 1052 | if (dom_info_available_p (CDI_DOMINATORS)) |
| 1053 | set_immediate_dominator (CDI_DOMINATORS, ret, src); |
| 1054 | |
| 1055 | if (current_loops((cfun + 0)->x_current_loops) != NULLnullptr) |
| 1056 | { |
| 1057 | basic_block pred = single_pred (ret); |
| 1058 | basic_block succ = single_succ (ret); |
| 1059 | class loop *loop |
| 1060 | = find_common_loop (pred->loop_father, succ->loop_father); |
| 1061 | rescan_loop_exit (e, false, true); |
| 1062 | add_bb_to_loop (ret, loop); |
| 1063 | |
| 1064 | /* If we split the latch edge of loop adjust the latch block. */ |
| 1065 | if (loop->latch == pred |
| 1066 | && loop->header == succ) |
| 1067 | loop->latch = ret; |
| 1068 | } |
| 1069 | } |
| 1070 | |
| 1071 | return ret; |
| 1072 | } |
| 1073 | |
| 1074 | /* Returns true if we can duplicate basic block BB. */ |
| 1075 | |
| 1076 | bool |
| 1077 | can_duplicate_block_p (const_basic_block bb) |
| 1078 | { |
| 1079 | if (!cfg_hooks->can_duplicate_block_p) |
| 1080 | internal_error ("%s does not support can_duplicate_block_p", |
| 1081 | cfg_hooks->name); |
| 1082 | |
| 1083 | if (bb == EXIT_BLOCK_PTR_FOR_FN (cfun)(((cfun + 0))->cfg->x_exit_block_ptr) || bb == ENTRY_BLOCK_PTR_FOR_FN (cfun)(((cfun + 0))->cfg->x_entry_block_ptr)) |
| 1084 | return false; |
| 1085 | |
| 1086 | return cfg_hooks->can_duplicate_block_p (bb); |
| 1087 | } |
| 1088 | |
| 1089 | /* Duplicate basic block BB, place it after AFTER (if non-null) and redirect |
| 1090 | edge E to it (if non-null). Return the new basic block. |
| 1091 | |
| 1092 | If BB contains a returns_twice call, the caller is responsible for recreating |
| 1093 | incoming abnormal edges corresponding to the "second return" for the copy. |
| 1094 | gimple_can_duplicate_bb_p rejects such blocks, while RTL likes to live |
| 1095 | dangerously. |
| 1096 | |
| 1097 | If BB has incoming abnormal edges for some other reason, their destinations |
| 1098 | should be tied to label(s) of the original BB and not the copy. */ |
| 1099 | |
| 1100 | basic_block |
| 1101 | duplicate_block (basic_block bb, edge e, basic_block after, copy_bb_data *id) |
| 1102 | { |
| 1103 | edge s, n; |
| 1104 | basic_block new_bb; |
| 1105 | profile_count new_count = e ? e->count (): profile_count::uninitialized (); |
| 1106 | edge_iterator ei; |
| 1107 | |
| 1108 | if (!cfg_hooks->duplicate_block) |
| 1109 | internal_error ("%s does not support duplicate_block", |
| 1110 | cfg_hooks->name); |
| 1111 | |
| 1112 | if (bb->count < new_count) |
| 1113 | new_count = bb->count; |
| 1114 | |
| 1115 | gcc_checking_assert (can_duplicate_block_p (bb))((void)(!(can_duplicate_block_p (bb)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/cfghooks.cc" , 1115, __FUNCTION__), 0 : 0)); |
| 1116 | |
| 1117 | new_bb = cfg_hooks->duplicate_block (bb, id); |
| 1118 | if (after) |
| 1119 | move_block_after (new_bb, after); |
| 1120 | |
| 1121 | new_bb->flags = (bb->flags & ~BB_DUPLICATED); |
| 1122 | FOR_EACH_EDGE (s, ei, bb->succs)for ((ei) = ei_start_1 (&((bb->succs))); ei_cond ((ei) , &(s)); ei_next (&(ei))) |
| 1123 | { |
| 1124 | /* Since we are creating edges from a new block to successors |
| 1125 | of another block (which therefore are known to be disjoint), there |
| 1126 | is no need to actually check for duplicated edges. */ |
| 1127 | n = unchecked_make_edge (new_bb, s->dest, s->flags); |
| 1128 | n->probability = s->probability; |
| 1129 | n->aux = s->aux; |
| 1130 | } |
| 1131 | |
| 1132 | if (e) |
| 1133 | { |
| 1134 | new_bb->count = new_count; |
| 1135 | bb->count -= new_count; |
| 1136 | |
| 1137 | redirect_edge_and_branch_force (e, new_bb); |
| 1138 | } |
| 1139 | else |
| 1140 | new_bb->count = bb->count; |
| 1141 | |
| 1142 | set_bb_original (new_bb, bb); |
| 1143 | set_bb_copy (bb, new_bb); |
| 1144 | |
| 1145 | /* Add the new block to the copy of the loop of BB, or directly to the loop |
| 1146 | of BB if the loop is not being copied. */ |
| 1147 | if (current_loops((cfun + 0)->x_current_loops) != NULLnullptr) |
| 1148 | { |
| 1149 | class loop *cloop = bb->loop_father; |
| 1150 | class loop *copy = get_loop_copy (cloop); |
| 1151 | /* If we copied the loop header block but not the loop |
| 1152 | we have created a loop with multiple entries. Ditch the loop, |
| 1153 | add the new block to the outer loop and arrange for a fixup. */ |
| 1154 | if (!copy |
| 1155 | && cloop->header == bb) |
| 1156 | { |
| 1157 | add_bb_to_loop (new_bb, loop_outer (cloop)); |
| 1158 | mark_loop_for_removal (cloop); |
| 1159 | } |
| 1160 | else |
| 1161 | { |
| 1162 | add_bb_to_loop (new_bb, copy ? copy : cloop); |
| 1163 | /* If we copied the loop latch block but not the loop, adjust |
| 1164 | loop state. */ |
| 1165 | if (!copy |
| 1166 | && cloop->latch == bb) |
| 1167 | { |
| 1168 | cloop->latch = NULLnullptr; |
| 1169 | loops_state_set (LOOPS_MAY_HAVE_MULTIPLE_LATCHES); |
| 1170 | } |
| 1171 | } |
| 1172 | } |
| 1173 | |
| 1174 | return new_bb; |
| 1175 | } |
| 1176 | |
| 1177 | /* Return 1 if BB ends with a call, possibly followed by some |
| 1178 | instructions that must stay with the call, 0 otherwise. */ |
| 1179 | |
| 1180 | bool |
| 1181 | block_ends_with_call_p (basic_block bb) |
| 1182 | { |
| 1183 | if (!cfg_hooks->block_ends_with_call_p) |
| 1184 | internal_error ("%s does not support block_ends_with_call_p", cfg_hooks->name); |
| 1185 | |
| 1186 | return (cfg_hooks->block_ends_with_call_p) (bb); |
| 1187 | } |
| 1188 | |
| 1189 | /* Return 1 if BB ends with a conditional branch, 0 otherwise. */ |
| 1190 | |
| 1191 | bool |
| 1192 | block_ends_with_condjump_p (const_basic_block bb) |
| 1193 | { |
| 1194 | if (!cfg_hooks->block_ends_with_condjump_p) |
| 1195 | internal_error ("%s does not support block_ends_with_condjump_p", |
| 1196 | cfg_hooks->name); |
| 1197 | |
| 1198 | return (cfg_hooks->block_ends_with_condjump_p) (bb); |
| 1199 | } |
| 1200 | |
| 1201 | /* Add fake edges to the function exit for any non constant and non noreturn |
| 1202 | calls, volatile inline assembly in the bitmap of blocks specified by |
| 1203 | BLOCKS or to the whole CFG if BLOCKS is zero. Return the number of blocks |
| 1204 | that were split. |
| 1205 | |
| 1206 | The goal is to expose cases in which entering a basic block does not imply |
| 1207 | that all subsequent instructions must be executed. */ |
| 1208 | |
| 1209 | int |
| 1210 | flow_call_edges_add (sbitmap blocks) |
| 1211 | { |
| 1212 | if (!cfg_hooks->flow_call_edges_add) |
| 1213 | internal_error ("%s does not support flow_call_edges_add", |
| 1214 | cfg_hooks->name); |
| 1215 | |
| 1216 | return (cfg_hooks->flow_call_edges_add) (blocks); |
| 1217 | } |
| 1218 | |
| 1219 | /* This function is called immediately after edge E is added to the |
| 1220 | edge vector E->dest->preds. */ |
| 1221 | |
| 1222 | void |
| 1223 | execute_on_growing_pred (edge e) |
| 1224 | { |
| 1225 | if (! (e->dest->flags & BB_DUPLICATED) |
| 1226 | && cfg_hooks->execute_on_growing_pred) |
| 1227 | cfg_hooks->execute_on_growing_pred (e); |
| 1228 | } |
| 1229 | |
| 1230 | /* This function is called immediately before edge E is removed from |
| 1231 | the edge vector E->dest->preds. */ |
| 1232 | |
| 1233 | void |
| 1234 | execute_on_shrinking_pred (edge e) |
| 1235 | { |
| 1236 | if (! (e->dest->flags & BB_DUPLICATED) |
| 1237 | && cfg_hooks->execute_on_shrinking_pred) |
| 1238 | cfg_hooks->execute_on_shrinking_pred (e); |
| 1239 | } |
| 1240 | |
| 1241 | /* This is used inside loop versioning when we want to insert |
| 1242 | stmts/insns on the edges, which have a different behavior |
| 1243 | in tree's and in RTL, so we made a CFG hook. */ |
| 1244 | void |
| 1245 | lv_flush_pending_stmts (edge e) |
| 1246 | { |
| 1247 | if (cfg_hooks->flush_pending_stmts) |
| 1248 | cfg_hooks->flush_pending_stmts (e); |
| 1249 | } |
| 1250 | |
| 1251 | /* Loop versioning uses the duplicate_loop_body_to_header_edge to create |
| 1252 | a new version of the loop basic-blocks, the parameters here are |
| 1253 | exactly the same as in duplicate_loop_body_to_header_edge or |
| 1254 | tree_duplicate_loop_body_to_header_edge; while in tree-ssa there is |
| 1255 | additional work to maintain ssa information that's why there is |
| 1256 | a need to call the tree_duplicate_loop_body_to_header_edge rather |
| 1257 | than duplicate_loop_body_to_header_edge when we are in tree mode. */ |
| 1258 | bool |
| 1259 | cfg_hook_duplicate_loop_body_to_header_edge (class loop *loop, edge e, |
| 1260 | unsigned int ndupl, |
| 1261 | sbitmap wont_exit, edge orig, |
| 1262 | vec<edge> *to_remove, int flags) |
| 1263 | { |
| 1264 | gcc_assert (cfg_hooks->cfg_hook_duplicate_loop_body_to_header_edge)((void)(!(cfg_hooks->cfg_hook_duplicate_loop_body_to_header_edge ) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/cfghooks.cc" , 1264, __FUNCTION__), 0 : 0)); |
| 1265 | return cfg_hooks->cfg_hook_duplicate_loop_body_to_header_edge ( |
| 1266 | loop, e, ndupl, wont_exit, orig, to_remove, flags); |
| 1267 | } |
| 1268 | |
| 1269 | /* Conditional jumps are represented differently in trees and RTL, |
| 1270 | this hook takes a basic block that is known to have a cond jump |
| 1271 | at its end and extracts the taken and not taken edges out of it |
| 1272 | and store it in E1 and E2 respectively. */ |
| 1273 | void |
| 1274 | extract_cond_bb_edges (basic_block b, edge *e1, edge *e2) |
| 1275 | { |
| 1276 | gcc_assert (cfg_hooks->extract_cond_bb_edges)((void)(!(cfg_hooks->extract_cond_bb_edges) ? fancy_abort ( "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/cfghooks.cc" , 1276, __FUNCTION__), 0 : 0)); |
| 1277 | cfg_hooks->extract_cond_bb_edges (b, e1, e2); |
| 1278 | } |
| 1279 | |
| 1280 | /* Responsible for updating the ssa info (PHI nodes) on the |
| 1281 | new condition basic block that guards the versioned loop. */ |
| 1282 | void |
| 1283 | lv_adjust_loop_header_phi (basic_block first, basic_block second, |
| 1284 | basic_block new_block, edge e) |
| 1285 | { |
| 1286 | if (cfg_hooks->lv_adjust_loop_header_phi) |
| 1287 | cfg_hooks->lv_adjust_loop_header_phi (first, second, new_block, e); |
| 1288 | } |
| 1289 | |
| 1290 | /* Conditions in trees and RTL are different so we need |
| 1291 | a different handling when we add the condition to the |
| 1292 | versioning code. */ |
| 1293 | void |
| 1294 | lv_add_condition_to_bb (basic_block first, basic_block second, |
| 1295 | basic_block new_block, void *cond) |
| 1296 | { |
| 1297 | gcc_assert (cfg_hooks->lv_add_condition_to_bb)((void)(!(cfg_hooks->lv_add_condition_to_bb) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/cfghooks.cc" , 1297, __FUNCTION__), 0 : 0)); |
| 1298 | cfg_hooks->lv_add_condition_to_bb (first, second, new_block, cond); |
| 1299 | } |
| 1300 | |
| 1301 | /* Checks whether all N blocks in BBS array can be copied. */ |
| 1302 | bool |
| 1303 | can_copy_bbs_p (basic_block *bbs, unsigned n) |
| 1304 | { |
| 1305 | unsigned i; |
| 1306 | edge e; |
| 1307 | int ret = true; |
| 1308 | |
| 1309 | for (i = 0; i < n; i++) |
| 1310 | bbs[i]->flags |= BB_DUPLICATED; |
| 1311 | |
| 1312 | for (i = 0; i < n; i++) |
| 1313 | { |
| 1314 | /* In case we should redirect abnormal edge during duplication, fail. */ |
| 1315 | edge_iterator ei; |
| 1316 | FOR_EACH_EDGE (e, ei, bbs[i]->succs)for ((ei) = ei_start_1 (&((bbs[i]->succs))); ei_cond ( (ei), &(e)); ei_next (&(ei))) |
| 1317 | if ((e->flags & EDGE_ABNORMAL) |
| 1318 | && (e->dest->flags & BB_DUPLICATED)) |
| 1319 | { |
| 1320 | ret = false; |
| 1321 | goto end; |
| 1322 | } |
| 1323 | |
| 1324 | if (!can_duplicate_block_p (bbs[i])) |
| 1325 | { |
| 1326 | ret = false; |
| 1327 | break; |
| 1328 | } |
| 1329 | } |
| 1330 | |
| 1331 | end: |
| 1332 | for (i = 0; i < n; i++) |
| 1333 | bbs[i]->flags &= ~BB_DUPLICATED; |
| 1334 | |
| 1335 | return ret; |
| 1336 | } |
| 1337 | |
| 1338 | /* Duplicates N basic blocks stored in array BBS. Newly created basic blocks |
| 1339 | are placed into array NEW_BBS in the same order. Edges from basic blocks |
| 1340 | in BBS are also duplicated and copies of those that lead into BBS are |
| 1341 | redirected to appropriate newly created block. The function assigns bbs |
| 1342 | into loops (copy of basic block bb is assigned to bb->loop_father->copy |
| 1343 | loop, so this must be set up correctly in advance) |
| 1344 | |
| 1345 | If UPDATE_DOMINANCE is true then this function updates dominators locally |
| 1346 | (LOOPS structure that contains the information about dominators is passed |
| 1347 | to enable this), otherwise it does not update the dominator information |
| 1348 | and it assumed that the caller will do this, perhaps by destroying and |
| 1349 | recreating it instead of trying to do an incremental update like this |
| 1350 | function does when update_dominance is true. |
| 1351 | |
| 1352 | BASE is the superloop to that basic block belongs; if its header or latch |
| 1353 | is copied, we do not set the new blocks as header or latch. |
| 1354 | |
| 1355 | Created copies of N_EDGES edges in array EDGES are stored in array NEW_EDGES, |
| 1356 | also in the same order. |
| 1357 | |
| 1358 | Newly created basic blocks are put after the basic block AFTER in the |
| 1359 | instruction stream, and the order of the blocks in BBS array is preserved. */ |
| 1360 | |
| 1361 | void |
| 1362 | copy_bbs (basic_block *bbs, unsigned n, basic_block *new_bbs, |
| 1363 | edge *edges, unsigned num_edges, edge *new_edges, |
| 1364 | class loop *base, basic_block after, bool update_dominance) |
| 1365 | { |
| 1366 | unsigned i, j; |
| 1367 | basic_block bb, new_bb, dom_bb; |
| 1368 | edge e; |
| 1369 | copy_bb_data id; |
| 1370 | |
| 1371 | /* Mark the blocks to be copied. This is used by edge creation hooks |
| 1372 | to decide whether to reallocate PHI nodes capacity to avoid reallocating |
| 1373 | PHIs in the set of source BBs. */ |
| 1374 | for (i = 0; i < n; i++) |
| 1375 | bbs[i]->flags |= BB_DUPLICATED; |
| 1376 | |
| 1377 | /* Duplicate bbs, update dominators, assign bbs to loops. */ |
| 1378 | for (i = 0; i < n; i++) |
| 1379 | { |
| 1380 | /* Duplicate. */ |
| 1381 | bb = bbs[i]; |
| 1382 | new_bb = new_bbs[i] = duplicate_block (bb, NULLnullptr, after, &id); |
| 1383 | after = new_bb; |
| 1384 | if (bb->loop_father) |
| 1385 | { |
| 1386 | /* Possibly set loop header. */ |
| 1387 | if (bb->loop_father->header == bb && bb->loop_father != base) |
| 1388 | new_bb->loop_father->header = new_bb; |
| 1389 | /* Or latch. */ |
| 1390 | if (bb->loop_father->latch == bb && bb->loop_father != base) |
| 1391 | new_bb->loop_father->latch = new_bb; |
| 1392 | } |
| 1393 | } |
| 1394 | |
| 1395 | /* Set dominators. */ |
| 1396 | if (update_dominance) |
| 1397 | { |
| 1398 | for (i = 0; i < n; i++) |
| 1399 | { |
| 1400 | bb = bbs[i]; |
| 1401 | new_bb = new_bbs[i]; |
| 1402 | |
| 1403 | dom_bb = get_immediate_dominator (CDI_DOMINATORS, bb); |
| 1404 | if (dom_bb->flags & BB_DUPLICATED) |
| 1405 | { |
| 1406 | dom_bb = get_bb_copy (dom_bb); |
| 1407 | set_immediate_dominator (CDI_DOMINATORS, new_bb, dom_bb); |
| 1408 | } |
| 1409 | } |
| 1410 | } |
| 1411 | |
| 1412 | /* Redirect edges. */ |
| 1413 | for (i = 0; i < n; i++) |
| 1414 | { |
| 1415 | edge_iterator ei; |
| 1416 | new_bb = new_bbs[i]; |
| 1417 | bb = bbs[i]; |
Value stored to 'bb' is never read | |
| 1418 | |
| 1419 | FOR_EACH_EDGE (e, ei, new_bb->succs)for ((ei) = ei_start_1 (&((new_bb->succs))); ei_cond ( (ei), &(e)); ei_next (&(ei))) |
| 1420 | { |
| 1421 | if (!(e->dest->flags & BB_DUPLICATED)) |
| 1422 | continue; |
| 1423 | redirect_edge_and_branch_force (e, get_bb_copy (e->dest)); |
| 1424 | } |
| 1425 | } |
| 1426 | for (j = 0; j < num_edges; j++) |
| 1427 | { |
| 1428 | if (!edges[j]) |
| 1429 | new_edges[j] = NULLnullptr; |
| 1430 | else |
| 1431 | { |
| 1432 | basic_block src = edges[j]->src; |
| 1433 | basic_block dest = edges[j]->dest; |
| 1434 | if (src->flags & BB_DUPLICATED) |
| 1435 | src = get_bb_copy (src); |
| 1436 | if (dest->flags & BB_DUPLICATED) |
| 1437 | dest = get_bb_copy (dest); |
| 1438 | new_edges[j] = find_edge (src, dest); |
| 1439 | } |
| 1440 | } |
| 1441 | |
| 1442 | /* Clear information about duplicates. */ |
| 1443 | for (i = 0; i < n; i++) |
| 1444 | bbs[i]->flags &= ~BB_DUPLICATED; |
| 1445 | } |
| 1446 | |
| 1447 | /* Return true if BB contains only labels or non-executable |
| 1448 | instructions */ |
| 1449 | bool |
| 1450 | empty_block_p (basic_block bb) |
| 1451 | { |
| 1452 | gcc_assert (cfg_hooks->empty_block_p)((void)(!(cfg_hooks->empty_block_p) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/cfghooks.cc" , 1452, __FUNCTION__), 0 : 0)); |
| 1453 | return cfg_hooks->empty_block_p (bb); |
| 1454 | } |
| 1455 | |
| 1456 | /* Split a basic block if it ends with a conditional branch and if |
| 1457 | the other part of the block is not empty. */ |
| 1458 | basic_block |
| 1459 | split_block_before_cond_jump (basic_block bb) |
| 1460 | { |
| 1461 | gcc_assert (cfg_hooks->split_block_before_cond_jump)((void)(!(cfg_hooks->split_block_before_cond_jump) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/cfghooks.cc" , 1461, __FUNCTION__), 0 : 0)); |
| 1462 | return cfg_hooks->split_block_before_cond_jump (bb); |
| 1463 | } |
| 1464 | |
| 1465 | /* Work-horse for passes.cc:check_profile_consistency. |
| 1466 | Do book-keeping of the CFG for the profile consistency checker. |
| 1467 | Store the counting in RECORD. */ |
| 1468 | |
| 1469 | void |
| 1470 | profile_record_check_consistency (profile_record *record) |
| 1471 | { |
| 1472 | basic_block bb; |
| 1473 | edge_iterator ei; |
| 1474 | edge e; |
| 1475 | |
| 1476 | FOR_ALL_BB_FN (bb, cfun)for (bb = (((cfun + 0))->cfg->x_entry_block_ptr); bb; bb = bb->next_bb) |
| 1477 | { |
| 1478 | if (bb != EXIT_BLOCK_PTR_FOR_FN (cfun)(((cfun + 0))->cfg->x_exit_block_ptr) |
| 1479 | && profile_status_for_fn (cfun)(((cfun + 0))->cfg->x_profile_status) != PROFILE_ABSENT |
| 1480 | && EDGE_COUNT (bb->succs)vec_safe_length (bb->succs)) |
| 1481 | { |
| 1482 | sreal sum = 0; |
| 1483 | bool found = false; |
| 1484 | FOR_EACH_EDGE (e, ei, bb->succs)for ((ei) = ei_start_1 (&((bb->succs))); ei_cond ((ei) , &(e)); ei_next (&(ei))) |
| 1485 | { |
| 1486 | if (!(e->flags & (EDGE_EH | EDGE_FAKE))) |
| 1487 | found = true; |
| 1488 | if (e->probability.initialized_p ()) |
| 1489 | sum += e->probability.to_sreal (); |
| 1490 | } |
| 1491 | double dsum = sum.to_double (); |
| 1492 | if (found && (dsum < 0.9 || dsum > 1.1) |
| 1493 | && !(bb->count == profile_count::zero ())) |
| 1494 | { |
| 1495 | record->num_mismatched_prob_out++; |
| 1496 | dsum = dsum > 1 ? dsum - 1 : 1 - dsum; |
| 1497 | if (profile_info) |
| 1498 | { |
| 1499 | if (ENTRY_BLOCK_PTR_FOR_FN(((cfun + 0))->cfg->x_entry_block_ptr) |
| 1500 | (cfun)(((cfun + 0))->cfg->x_entry_block_ptr)->count.ipa ().initialized_p () |
| 1501 | && ENTRY_BLOCK_PTR_FOR_FN(((cfun + 0))->cfg->x_entry_block_ptr) |
| 1502 | (cfun)(((cfun + 0))->cfg->x_entry_block_ptr)->count.ipa ().nonzero_p () |
| 1503 | && bb->count.ipa ().initialized_p ()) |
| 1504 | record->dyn_mismatched_prob_out |
| 1505 | += dsum * bb->count.ipa ().to_gcov_type (); |
| 1506 | } |
| 1507 | else if (bb->count.initialized_p ()) |
| 1508 | record->dyn_mismatched_prob_out |
| 1509 | += dsum * bb->count.to_sreal_scale |
| 1510 | (ENTRY_BLOCK_PTR_FOR_FN (cfun)(((cfun + 0))->cfg->x_entry_block_ptr)->count).to_double (); |
| 1511 | } |
| 1512 | } |
| 1513 | if (bb != ENTRY_BLOCK_PTR_FOR_FN (cfun)(((cfun + 0))->cfg->x_entry_block_ptr) |
| 1514 | && profile_status_for_fn (cfun)(((cfun + 0))->cfg->x_profile_status) != PROFILE_ABSENT) |
| 1515 | { |
| 1516 | profile_count lsum = profile_count::zero (); |
| 1517 | FOR_EACH_EDGE (e, ei, bb->preds)for ((ei) = ei_start_1 (&((bb->preds))); ei_cond ((ei) , &(e)); ei_next (&(ei))) |
| 1518 | lsum += e->count (); |
| 1519 | if (lsum.differs_from_p (bb->count)) |
| 1520 | { |
| 1521 | record->num_mismatched_count_in++; |
| 1522 | profile_count max; |
| 1523 | if (lsum < bb->count) |
| 1524 | max = bb->count; |
| 1525 | else |
| 1526 | max = lsum; |
| 1527 | if (profile_info) |
| 1528 | { |
| 1529 | if (ENTRY_BLOCK_PTR_FOR_FN(((cfun + 0))->cfg->x_entry_block_ptr) |
| 1530 | (cfun)(((cfun + 0))->cfg->x_entry_block_ptr)->count.ipa ().initialized_p () |
| 1531 | && ENTRY_BLOCK_PTR_FOR_FN(((cfun + 0))->cfg->x_entry_block_ptr) |
| 1532 | (cfun)(((cfun + 0))->cfg->x_entry_block_ptr)->count.ipa ().nonzero_p () |
| 1533 | && max.ipa ().initialized_p ()) |
| 1534 | record->dyn_mismatched_count_in |
| 1535 | += max.ipa ().to_gcov_type (); |
| 1536 | } |
| 1537 | else if (bb->count.initialized_p ()) |
| 1538 | record->dyn_mismatched_prob_out |
| 1539 | += max.to_sreal_scale |
| 1540 | (ENTRY_BLOCK_PTR_FOR_FN (cfun)(((cfun + 0))->cfg->x_entry_block_ptr)->count).to_double (); |
| 1541 | } |
| 1542 | } |
| 1543 | if (bb == ENTRY_BLOCK_PTR_FOR_FN (cfun)(((cfun + 0))->cfg->x_entry_block_ptr) |
| 1544 | || bb == EXIT_BLOCK_PTR_FOR_FN (cfun)(((cfun + 0))->cfg->x_exit_block_ptr)) |
| 1545 | continue; |
| 1546 | } |
| 1547 | } |
| 1548 | |
| 1549 | /* Work-horse for passes.cc:acount_profile. |
| 1550 | Do book-keeping of the CFG for the profile accounting. |
| 1551 | Store the counting in RECORD. */ |
| 1552 | |
| 1553 | void |
| 1554 | profile_record_account_profile (profile_record *record) |
| 1555 | { |
| 1556 | basic_block bb; |
| 1557 | |
| 1558 | FOR_ALL_BB_FN (bb, cfun)for (bb = (((cfun + 0))->cfg->x_entry_block_ptr); bb; bb = bb->next_bb) |
| 1559 | { |
| 1560 | gcc_assert (cfg_hooks->account_profile_record)((void)(!(cfg_hooks->account_profile_record) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/cfghooks.cc" , 1560, __FUNCTION__), 0 : 0)); |
| 1561 | cfg_hooks->account_profile_record (bb, record); |
| 1562 | } |
| 1563 | } |
| 1564 | |
| 1565 | #if __GNUC__4 >= 10 |
| 1566 | # pragma GCC diagnostic pop |
| 1567 | #endif |