Mercurial > hg > CbC > CbC_gcc
annotate gcc/basic-block.h @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 1830386684a0 |
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rev | line source |
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1 /* Define control flow data structures for the CFG. |
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 #ifndef GCC_BASIC_BLOCK_H | |
21 #define GCC_BASIC_BLOCK_H | |
22 | |
111 | 23 #include <profile-count.h> |
0 | 24 |
25 /* Control flow edge information. */ | |
145 | 26 class GTY((user)) edge_def { |
27 public: | |
0 | 28 /* The two blocks at the ends of the edge. */ |
111 | 29 basic_block src; |
30 basic_block dest; | |
0 | 31 |
32 /* Instructions queued on the edge. */ | |
33 union edge_def_insns { | |
111 | 34 gimple_seq g; |
35 rtx_insn *r; | |
36 } insns; | |
0 | 37 |
38 /* Auxiliary info specific to a pass. */ | |
111 | 39 PTR aux; |
0 | 40 |
111 | 41 /* Location of any goto implicit in the edge. */ |
0 | 42 location_t goto_locus; |
43 | |
44 /* The index number corresponding to this edge in the edge vector | |
45 dest->preds. */ | |
46 unsigned int dest_idx; | |
47 | |
111 | 48 int flags; /* see cfg-flags.def */ |
49 profile_probability probability; | |
50 | |
51 /* Return count of edge E. */ | |
52 inline profile_count count () const; | |
0 | 53 }; |
54 | |
111 | 55 /* Masks for edge.flags. */ |
56 #define DEF_EDGE_FLAG(NAME,IDX) EDGE_##NAME = 1 << IDX , | |
57 enum cfg_edge_flags { | |
58 #include "cfg-flags.def" | |
59 LAST_CFG_EDGE_FLAG /* this is only used for EDGE_ALL_FLAGS */ | |
60 }; | |
61 #undef DEF_EDGE_FLAG | |
62 | |
63 /* Bit mask for all edge flags. */ | |
64 #define EDGE_ALL_FLAGS ((LAST_CFG_EDGE_FLAG - 1) * 2 - 1) | |
65 | |
66 /* The following four flags all indicate something special about an edge. | |
67 Test the edge flags on EDGE_COMPLEX to detect all forms of "strange" | |
68 control flow transfers. */ | |
69 #define EDGE_COMPLEX \ | |
70 (EDGE_ABNORMAL | EDGE_ABNORMAL_CALL | EDGE_EH | EDGE_PRESERVE) | |
0 | 71 |
111 | 72 struct GTY(()) rtl_bb_info { |
73 /* The first insn of the block is embedded into bb->il.x. */ | |
74 /* The last insn of the block. */ | |
75 rtx_insn *end_; | |
0 | 76 |
111 | 77 /* In CFGlayout mode points to insn notes/jumptables to be placed just before |
78 and after the block. */ | |
79 rtx_insn *header_; | |
80 rtx_insn *footer_; | |
81 }; | |
0 | 82 |
111 | 83 struct GTY(()) gimple_bb_info { |
84 /* Sequence of statements in this block. */ | |
85 gimple_seq seq; | |
0 | 86 |
111 | 87 /* PHI nodes for this block. */ |
88 gimple_seq phi_nodes; | |
89 }; | |
0 | 90 |
111 | 91 /* A basic block is a sequence of instructions with only one entry and |
0 | 92 only one exit. If any one of the instructions are executed, they |
93 will all be executed, and in sequence from first to last. | |
94 | |
95 There may be COND_EXEC instructions in the basic block. The | |
96 COND_EXEC *instructions* will be executed -- but if the condition | |
97 is false the conditionally executed *expressions* will of course | |
98 not be executed. We don't consider the conditionally executed | |
99 expression (which might have side-effects) to be in a separate | |
100 basic block because the program counter will always be at the same | |
101 location after the COND_EXEC instruction, regardless of whether the | |
102 condition is true or not. | |
103 | |
104 Basic blocks need not start with a label nor end with a jump insn. | |
105 For example, a previous basic block may just "conditionally fall" | |
106 into the succeeding basic block, and the last basic block need not | |
107 end with a jump insn. Block 0 is a descendant of the entry block. | |
108 | |
109 A basic block beginning with two labels cannot have notes between | |
110 the labels. | |
111 | |
112 Data for jump tables are stored in jump_insns that occur in no | |
113 basic block even though these insns can follow or precede insns in | |
114 basic blocks. */ | |
115 | |
116 /* Basic block information indexed by block number. */ | |
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117 struct GTY((chain_next ("%h.next_bb"), chain_prev ("%h.prev_bb"))) basic_block_def { |
0 | 118 /* The edges into and out of the block. */ |
111 | 119 vec<edge, va_gc> *preds; |
120 vec<edge, va_gc> *succs; | |
0 | 121 |
122 /* Auxiliary info specific to a pass. */ | |
123 PTR GTY ((skip (""))) aux; | |
124 | |
125 /* Innermost loop containing the block. */ | |
145 | 126 class loop *loop_father; |
0 | 127 |
128 /* The dominance and postdominance information node. */ | |
129 struct et_node * GTY ((skip (""))) dom[2]; | |
130 | |
131 /* Previous and next blocks in the chain. */ | |
111 | 132 basic_block prev_bb; |
133 basic_block next_bb; | |
0 | 134 |
135 union basic_block_il_dependent { | |
111 | 136 struct gimple_bb_info GTY ((tag ("0"))) gimple; |
137 struct { | |
138 rtx_insn *head_; | |
139 struct rtl_bb_info * rtl; | |
140 } GTY ((tag ("1"))) x; | |
0 | 141 } GTY ((desc ("((%1.flags & BB_RTL) != 0)"))) il; |
142 | |
111 | 143 /* Various flags. See cfg-flags.def. */ |
144 int flags; | |
0 | 145 |
146 /* The index of this block. */ | |
147 int index; | |
148 | |
111 | 149 /* Expected number of executions: calculated in profile.c. */ |
150 profile_count count; | |
0 | 151 |
111 | 152 /* The discriminator for this block. The discriminator distinguishes |
153 among several basic blocks that share a common locus, allowing for | |
154 more accurate sample-based profiling. */ | |
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155 int discriminator; |
0 | 156 }; |
157 | |
111 | 158 /* This ensures that struct gimple_bb_info is smaller than |
159 struct rtl_bb_info, so that inlining the former into basic_block_def | |
160 is the better choice. */ | |
161 typedef int __assert_gimple_bb_smaller_rtl_bb | |
162 [(int) sizeof (struct rtl_bb_info) | |
163 - (int) sizeof (struct gimple_bb_info)]; | |
0 | 164 |
165 | |
166 #define BB_FREQ_MAX 10000 | |
167 | |
111 | 168 /* Masks for basic_block.flags. */ |
169 #define DEF_BASIC_BLOCK_FLAG(NAME,IDX) BB_##NAME = 1 << IDX , | |
170 enum cfg_bb_flags | |
0 | 171 { |
111 | 172 #include "cfg-flags.def" |
173 LAST_CFG_BB_FLAG /* this is only used for BB_ALL_FLAGS */ | |
174 }; | |
175 #undef DEF_BASIC_BLOCK_FLAG | |
0 | 176 |
111 | 177 /* Bit mask for all basic block flags. */ |
178 #define BB_ALL_FLAGS ((LAST_CFG_BB_FLAG - 1) * 2 - 1) | |
0 | 179 |
111 | 180 /* Bit mask for all basic block flags that must be preserved. These are |
181 the bit masks that are *not* cleared by clear_bb_flags. */ | |
182 #define BB_FLAGS_TO_PRESERVE \ | |
183 (BB_DISABLE_SCHEDULE | BB_RTL | BB_NON_LOCAL_GOTO_TARGET \ | |
184 | BB_HOT_PARTITION | BB_COLD_PARTITION) | |
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185 |
111 | 186 /* Dummy bitmask for convenience in the hot/cold partitioning code. */ |
0 | 187 #define BB_UNPARTITIONED 0 |
188 | |
189 /* Partitions, to be used when partitioning hot and cold basic blocks into | |
190 separate sections. */ | |
191 #define BB_PARTITION(bb) ((bb)->flags & (BB_HOT_PARTITION|BB_COLD_PARTITION)) | |
192 #define BB_SET_PARTITION(bb, part) do { \ | |
193 basic_block bb_ = (bb); \ | |
194 bb_->flags = ((bb_->flags & ~(BB_HOT_PARTITION|BB_COLD_PARTITION)) \ | |
195 | (part)); \ | |
196 } while (0) | |
197 | |
198 #define BB_COPY_PARTITION(dstbb, srcbb) \ | |
199 BB_SET_PARTITION (dstbb, BB_PARTITION (srcbb)) | |
200 | |
111 | 201 /* Defines for accessing the fields of the CFG structure for function FN. */ |
202 #define ENTRY_BLOCK_PTR_FOR_FN(FN) ((FN)->cfg->x_entry_block_ptr) | |
203 #define EXIT_BLOCK_PTR_FOR_FN(FN) ((FN)->cfg->x_exit_block_ptr) | |
204 #define basic_block_info_for_fn(FN) ((FN)->cfg->x_basic_block_info) | |
205 #define n_basic_blocks_for_fn(FN) ((FN)->cfg->x_n_basic_blocks) | |
206 #define n_edges_for_fn(FN) ((FN)->cfg->x_n_edges) | |
207 #define last_basic_block_for_fn(FN) ((FN)->cfg->x_last_basic_block) | |
208 #define label_to_block_map_for_fn(FN) ((FN)->cfg->x_label_to_block_map) | |
209 #define profile_status_for_fn(FN) ((FN)->cfg->x_profile_status) | |
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210 |
111 | 211 #define BASIC_BLOCK_FOR_FN(FN,N) \ |
212 ((*basic_block_info_for_fn (FN))[(N)]) | |
213 #define SET_BASIC_BLOCK_FOR_FN(FN,N,BB) \ | |
214 ((*basic_block_info_for_fn (FN))[(N)] = (BB)) | |
0 | 215 |
216 /* For iterating over basic blocks. */ | |
217 #define FOR_BB_BETWEEN(BB, FROM, TO, DIR) \ | |
218 for (BB = FROM; BB != TO; BB = BB->DIR) | |
219 | |
220 #define FOR_EACH_BB_FN(BB, FN) \ | |
221 FOR_BB_BETWEEN (BB, (FN)->cfg->x_entry_block_ptr->next_bb, (FN)->cfg->x_exit_block_ptr, next_bb) | |
222 | |
223 #define FOR_EACH_BB_REVERSE_FN(BB, FN) \ | |
224 FOR_BB_BETWEEN (BB, (FN)->cfg->x_exit_block_ptr->prev_bb, (FN)->cfg->x_entry_block_ptr, prev_bb) | |
225 | |
226 /* For iterating over insns in basic block. */ | |
227 #define FOR_BB_INSNS(BB, INSN) \ | |
228 for ((INSN) = BB_HEAD (BB); \ | |
229 (INSN) && (INSN) != NEXT_INSN (BB_END (BB)); \ | |
230 (INSN) = NEXT_INSN (INSN)) | |
231 | |
232 /* For iterating over insns in basic block when we might remove the | |
233 current insn. */ | |
234 #define FOR_BB_INSNS_SAFE(BB, INSN, CURR) \ | |
235 for ((INSN) = BB_HEAD (BB), (CURR) = (INSN) ? NEXT_INSN ((INSN)): NULL; \ | |
236 (INSN) && (INSN) != NEXT_INSN (BB_END (BB)); \ | |
237 (INSN) = (CURR), (CURR) = (INSN) ? NEXT_INSN ((INSN)) : NULL) | |
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238 |
0 | 239 #define FOR_BB_INSNS_REVERSE(BB, INSN) \ |
240 for ((INSN) = BB_END (BB); \ | |
241 (INSN) && (INSN) != PREV_INSN (BB_HEAD (BB)); \ | |
242 (INSN) = PREV_INSN (INSN)) | |
243 | |
244 #define FOR_BB_INSNS_REVERSE_SAFE(BB, INSN, CURR) \ | |
245 for ((INSN) = BB_END (BB),(CURR) = (INSN) ? PREV_INSN ((INSN)) : NULL; \ | |
246 (INSN) && (INSN) != PREV_INSN (BB_HEAD (BB)); \ | |
247 (INSN) = (CURR), (CURR) = (INSN) ? PREV_INSN ((INSN)) : NULL) | |
248 | |
249 /* Cycles through _all_ basic blocks, even the fake ones (entry and | |
250 exit block). */ | |
251 | |
252 #define FOR_ALL_BB_FN(BB, FN) \ | |
111 | 253 for (BB = ENTRY_BLOCK_PTR_FOR_FN (FN); BB; BB = BB->next_bb) |
0 | 254 |
255 | |
256 /* Stuff for recording basic block info. */ | |
257 | |
111 | 258 /* For now, these will be functions (so that they can include checked casts |
259 to rtx_insn. Once the underlying fields are converted from rtx | |
260 to rtx_insn, these can be converted back to macros. */ | |
261 | |
262 #define BB_HEAD(B) (B)->il.x.head_ | |
263 #define BB_END(B) (B)->il.x.rtl->end_ | |
264 #define BB_HEADER(B) (B)->il.x.rtl->header_ | |
265 #define BB_FOOTER(B) (B)->il.x.rtl->footer_ | |
0 | 266 |
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267 /* Special block numbers [markers] for entry and exit. |
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268 Neither of them is supposed to hold actual statements. */ |
0 | 269 #define ENTRY_BLOCK (0) |
270 #define EXIT_BLOCK (1) | |
271 | |
272 /* The two blocks that are always in the cfg. */ | |
273 #define NUM_FIXED_BLOCKS (2) | |
274 | |
275 /* This is the value which indicates no edge is present. */ | |
276 #define EDGE_INDEX_NO_EDGE -1 | |
277 | |
278 /* EDGE_INDEX returns an integer index for an edge, or EDGE_INDEX_NO_EDGE | |
279 if there is no edge between the 2 basic blocks. */ | |
280 #define EDGE_INDEX(el, pred, succ) (find_edge_index ((el), (pred), (succ))) | |
281 | |
282 /* INDEX_EDGE_PRED_BB and INDEX_EDGE_SUCC_BB return a pointer to the basic | |
283 block which is either the pred or succ end of the indexed edge. */ | |
284 #define INDEX_EDGE_PRED_BB(el, index) ((el)->index_to_edge[(index)]->src) | |
285 #define INDEX_EDGE_SUCC_BB(el, index) ((el)->index_to_edge[(index)]->dest) | |
286 | |
287 /* INDEX_EDGE returns a pointer to the edge. */ | |
288 #define INDEX_EDGE(el, index) ((el)->index_to_edge[(index)]) | |
289 | |
290 /* Number of edges in the compressed edge list. */ | |
291 #define NUM_EDGES(el) ((el)->num_edges) | |
292 | |
293 /* BB is assumed to contain conditional jump. Return the fallthru edge. */ | |
294 #define FALLTHRU_EDGE(bb) (EDGE_SUCC ((bb), 0)->flags & EDGE_FALLTHRU \ | |
295 ? EDGE_SUCC ((bb), 0) : EDGE_SUCC ((bb), 1)) | |
296 | |
297 /* BB is assumed to contain conditional jump. Return the branch edge. */ | |
298 #define BRANCH_EDGE(bb) (EDGE_SUCC ((bb), 0)->flags & EDGE_FALLTHRU \ | |
299 ? EDGE_SUCC ((bb), 1) : EDGE_SUCC ((bb), 0)) | |
300 | |
301 /* Return expected execution frequency of the edge E. */ | |
131 | 302 #define EDGE_FREQUENCY(e) e->count ().to_frequency (cfun) |
111 | 303 |
304 /* Compute a scale factor (or probability) suitable for scaling of | |
305 gcov_type values via apply_probability() and apply_scale(). */ | |
306 #define GCOV_COMPUTE_SCALE(num,den) \ | |
307 ((den) ? RDIV ((num) * REG_BR_PROB_BASE, (den)) : REG_BR_PROB_BASE) | |
0 | 308 |
309 /* Return nonzero if edge is critical. */ | |
310 #define EDGE_CRITICAL_P(e) (EDGE_COUNT ((e)->src->succs) >= 2 \ | |
311 && EDGE_COUNT ((e)->dest->preds) >= 2) | |
312 | |
111 | 313 #define EDGE_COUNT(ev) vec_safe_length (ev) |
314 #define EDGE_I(ev,i) (*ev)[(i)] | |
315 #define EDGE_PRED(bb,i) (*(bb)->preds)[(i)] | |
316 #define EDGE_SUCC(bb,i) (*(bb)->succs)[(i)] | |
0 | 317 |
318 /* Returns true if BB has precisely one successor. */ | |
319 | |
320 static inline bool | |
321 single_succ_p (const_basic_block bb) | |
322 { | |
323 return EDGE_COUNT (bb->succs) == 1; | |
324 } | |
325 | |
326 /* Returns true if BB has precisely one predecessor. */ | |
327 | |
328 static inline bool | |
329 single_pred_p (const_basic_block bb) | |
330 { | |
331 return EDGE_COUNT (bb->preds) == 1; | |
332 } | |
333 | |
334 /* Returns the single successor edge of basic block BB. Aborts if | |
335 BB does not have exactly one successor. */ | |
336 | |
337 static inline edge | |
338 single_succ_edge (const_basic_block bb) | |
339 { | |
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340 gcc_checking_assert (single_succ_p (bb)); |
0 | 341 return EDGE_SUCC (bb, 0); |
342 } | |
343 | |
344 /* Returns the single predecessor edge of basic block BB. Aborts | |
345 if BB does not have exactly one predecessor. */ | |
346 | |
347 static inline edge | |
348 single_pred_edge (const_basic_block bb) | |
349 { | |
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parents:
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350 gcc_checking_assert (single_pred_p (bb)); |
0 | 351 return EDGE_PRED (bb, 0); |
352 } | |
353 | |
354 /* Returns the single successor block of basic block BB. Aborts | |
355 if BB does not have exactly one successor. */ | |
356 | |
357 static inline basic_block | |
358 single_succ (const_basic_block bb) | |
359 { | |
360 return single_succ_edge (bb)->dest; | |
361 } | |
362 | |
363 /* Returns the single predecessor block of basic block BB. Aborts | |
364 if BB does not have exactly one predecessor.*/ | |
365 | |
366 static inline basic_block | |
367 single_pred (const_basic_block bb) | |
368 { | |
369 return single_pred_edge (bb)->src; | |
370 } | |
371 | |
372 /* Iterator object for edges. */ | |
373 | |
111 | 374 struct edge_iterator { |
0 | 375 unsigned index; |
111 | 376 vec<edge, va_gc> **container; |
377 }; | |
0 | 378 |
111 | 379 static inline vec<edge, va_gc> * |
0 | 380 ei_container (edge_iterator i) |
381 { | |
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parents:
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382 gcc_checking_assert (i.container); |
0 | 383 return *i.container; |
384 } | |
385 | |
386 #define ei_start(iter) ei_start_1 (&(iter)) | |
387 #define ei_last(iter) ei_last_1 (&(iter)) | |
388 | |
389 /* Return an iterator pointing to the start of an edge vector. */ | |
390 static inline edge_iterator | |
111 | 391 ei_start_1 (vec<edge, va_gc> **ev) |
0 | 392 { |
393 edge_iterator i; | |
394 | |
395 i.index = 0; | |
396 i.container = ev; | |
397 | |
398 return i; | |
399 } | |
400 | |
401 /* Return an iterator pointing to the last element of an edge | |
402 vector. */ | |
403 static inline edge_iterator | |
111 | 404 ei_last_1 (vec<edge, va_gc> **ev) |
0 | 405 { |
406 edge_iterator i; | |
407 | |
408 i.index = EDGE_COUNT (*ev) - 1; | |
409 i.container = ev; | |
410 | |
411 return i; | |
412 } | |
413 | |
414 /* Is the iterator `i' at the end of the sequence? */ | |
415 static inline bool | |
416 ei_end_p (edge_iterator i) | |
417 { | |
418 return (i.index == EDGE_COUNT (ei_container (i))); | |
419 } | |
420 | |
421 /* Is the iterator `i' at one position before the end of the | |
422 sequence? */ | |
423 static inline bool | |
424 ei_one_before_end_p (edge_iterator i) | |
425 { | |
426 return (i.index + 1 == EDGE_COUNT (ei_container (i))); | |
427 } | |
428 | |
429 /* Advance the iterator to the next element. */ | |
430 static inline void | |
431 ei_next (edge_iterator *i) | |
432 { | |
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433 gcc_checking_assert (i->index < EDGE_COUNT (ei_container (*i))); |
0 | 434 i->index++; |
435 } | |
436 | |
437 /* Move the iterator to the previous element. */ | |
438 static inline void | |
439 ei_prev (edge_iterator *i) | |
440 { | |
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441 gcc_checking_assert (i->index > 0); |
0 | 442 i->index--; |
443 } | |
444 | |
445 /* Return the edge pointed to by the iterator `i'. */ | |
446 static inline edge | |
447 ei_edge (edge_iterator i) | |
448 { | |
449 return EDGE_I (ei_container (i), i.index); | |
450 } | |
451 | |
452 /* Return an edge pointed to by the iterator. Do it safely so that | |
453 NULL is returned when the iterator is pointing at the end of the | |
454 sequence. */ | |
455 static inline edge | |
456 ei_safe_edge (edge_iterator i) | |
457 { | |
458 return !ei_end_p (i) ? ei_edge (i) : NULL; | |
459 } | |
460 | |
461 /* Return 1 if we should continue to iterate. Return 0 otherwise. | |
462 *Edge P is set to the next edge if we are to continue to iterate | |
463 and NULL otherwise. */ | |
464 | |
465 static inline bool | |
466 ei_cond (edge_iterator ei, edge *p) | |
467 { | |
468 if (!ei_end_p (ei)) | |
469 { | |
470 *p = ei_edge (ei); | |
471 return 1; | |
472 } | |
473 else | |
474 { | |
475 *p = NULL; | |
476 return 0; | |
477 } | |
478 } | |
479 | |
480 /* This macro serves as a convenient way to iterate each edge in a | |
481 vector of predecessor or successor edges. It must not be used when | |
482 an element might be removed during the traversal, otherwise | |
483 elements will be missed. Instead, use a for-loop like that shown | |
484 in the following pseudo-code: | |
485 | |
486 FOR (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); ) | |
487 { | |
488 IF (e != taken_edge) | |
489 remove_edge (e); | |
490 ELSE | |
491 ei_next (&ei); | |
492 } | |
493 */ | |
494 | |
495 #define FOR_EACH_EDGE(EDGE,ITER,EDGE_VEC) \ | |
496 for ((ITER) = ei_start ((EDGE_VEC)); \ | |
497 ei_cond ((ITER), &(EDGE)); \ | |
498 ei_next (&(ITER))) | |
499 | |
500 #define CLEANUP_EXPENSIVE 1 /* Do relatively expensive optimizations | |
501 except for edge forwarding */ | |
502 #define CLEANUP_CROSSJUMP 2 /* Do crossjumping. */ | |
503 #define CLEANUP_POST_REGSTACK 4 /* We run after reg-stack and need | |
504 to care REG_DEAD notes. */ | |
505 #define CLEANUP_THREADING 8 /* Do jump threading. */ | |
506 #define CLEANUP_NO_INSN_DEL 16 /* Do not try to delete trivially dead | |
507 insns. */ | |
508 #define CLEANUP_CFGLAYOUT 32 /* Do cleanup in cfglayout mode. */ | |
111 | 509 #define CLEANUP_CFG_CHANGED 64 /* The caller changed the CFG. */ |
131 | 510 #define CLEANUP_NO_PARTITIONING 128 /* Do not try to fix partitions. */ |
145 | 511 #define CLEANUP_FORCE_FAST_DCE 0x100 /* Force run_fast_dce to be called |
512 at least once. */ | |
0 | 513 |
111 | 514 /* Return true if BB is in a transaction. */ |
0 | 515 |
111 | 516 static inline bool |
517 bb_in_transaction (basic_block bb) | |
0 | 518 { |
111 | 519 return bb->flags & BB_IN_TRANSACTION; |
520 } | |
0 | 521 |
522 /* Return true when one of the predecessor edges of BB is marked with EDGE_EH. */ | |
523 static inline bool | |
524 bb_has_eh_pred (basic_block bb) | |
525 { | |
526 edge e; | |
527 edge_iterator ei; | |
528 | |
529 FOR_EACH_EDGE (e, ei, bb->preds) | |
530 { | |
531 if (e->flags & EDGE_EH) | |
532 return true; | |
533 } | |
534 return false; | |
535 } | |
536 | |
537 /* Return true when one of the predecessor edges of BB is marked with EDGE_ABNORMAL. */ | |
538 static inline bool | |
539 bb_has_abnormal_pred (basic_block bb) | |
540 { | |
541 edge e; | |
542 edge_iterator ei; | |
543 | |
544 FOR_EACH_EDGE (e, ei, bb->preds) | |
545 { | |
546 if (e->flags & EDGE_ABNORMAL) | |
547 return true; | |
548 } | |
549 return false; | |
550 } | |
551 | |
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552 /* Return the fallthru edge in EDGES if it exists, NULL otherwise. */ |
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553 static inline edge |
111 | 554 find_fallthru_edge (vec<edge, va_gc> *edges) |
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555 { |
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556 edge e; |
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557 edge_iterator ei; |
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558 |
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559 FOR_EACH_EDGE (e, ei, edges) |
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560 if (e->flags & EDGE_FALLTHRU) |
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561 break; |
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562 |
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563 return e; |
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564 } |
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565 |
111 | 566 /* Check tha probability is sane. */ |
567 | |
568 static inline void | |
569 check_probability (int prob) | |
570 { | |
571 gcc_checking_assert (prob >= 0 && prob <= REG_BR_PROB_BASE); | |
572 } | |
573 | |
574 /* Given PROB1 and PROB2, return PROB1*PROB2/REG_BR_PROB_BASE. | |
575 Used to combine BB probabilities. */ | |
576 | |
577 static inline int | |
578 combine_probabilities (int prob1, int prob2) | |
579 { | |
580 check_probability (prob1); | |
581 check_probability (prob2); | |
582 return RDIV (prob1 * prob2, REG_BR_PROB_BASE); | |
583 } | |
584 | |
585 /* Apply scale factor SCALE on frequency or count FREQ. Use this | |
586 interface when potentially scaling up, so that SCALE is not | |
587 constrained to be < REG_BR_PROB_BASE. */ | |
588 | |
589 static inline gcov_type | |
590 apply_scale (gcov_type freq, gcov_type scale) | |
591 { | |
592 return RDIV (freq * scale, REG_BR_PROB_BASE); | |
593 } | |
594 | |
595 /* Apply probability PROB on frequency or count FREQ. */ | |
596 | |
597 static inline gcov_type | |
598 apply_probability (gcov_type freq, int prob) | |
599 { | |
600 check_probability (prob); | |
601 return apply_scale (freq, prob); | |
602 } | |
603 | |
604 /* Return inverse probability for PROB. */ | |
0 | 605 |
111 | 606 static inline int |
607 inverse_probability (int prob1) | |
608 { | |
609 check_probability (prob1); | |
610 return REG_BR_PROB_BASE - prob1; | |
611 } | |
612 | |
613 /* Return true if BB has at least one abnormal outgoing edge. */ | |
614 | |
615 static inline bool | |
616 has_abnormal_or_eh_outgoing_edge_p (basic_block bb) | |
617 { | |
618 edge e; | |
619 edge_iterator ei; | |
620 | |
621 FOR_EACH_EDGE (e, ei, bb->succs) | |
622 if (e->flags & (EDGE_ABNORMAL | EDGE_EH)) | |
623 return true; | |
624 | |
625 return false; | |
626 } | |
627 | |
628 /* Return true when one of the predecessor edges of BB is marked with | |
629 EDGE_ABNORMAL_CALL or EDGE_EH. */ | |
630 | |
631 static inline bool | |
632 has_abnormal_call_or_eh_pred_edge_p (basic_block bb) | |
633 { | |
634 edge e; | |
635 edge_iterator ei; | |
636 | |
637 FOR_EACH_EDGE (e, ei, bb->preds) | |
638 if (e->flags & (EDGE_ABNORMAL_CALL | EDGE_EH)) | |
639 return true; | |
640 | |
641 return false; | |
642 } | |
643 | |
644 /* Return count of edge E. */ | |
645 inline profile_count edge_def::count () const | |
646 { | |
647 return src->count.apply_probability (probability); | |
648 } | |
0 | 649 |
650 #endif /* GCC_BASIC_BLOCK_H */ |