Mercurial > hg > CbC > CbC_gcc
comparison gcc/ipa-fnsummary.c @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
parents | |
children | 84e7813d76e9 |
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1 /* Function summary pass. | |
2 Copyright (C) 2003-2017 Free Software Foundation, Inc. | |
3 Contributed by Jan Hubicka | |
4 | |
5 This file is part of GCC. | |
6 | |
7 GCC is free software; you can redistribute it and/or modify it under | |
8 the terms of the GNU General Public License as published by the Free | |
9 Software Foundation; either version 3, or (at your option) any later | |
10 version. | |
11 | |
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 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 /* Analysis of function bodies used by inter-procedural passes | |
22 | |
23 We estimate for each function | |
24 - function body size and size after specializing into given context | |
25 - average function execution time in a given context | |
26 - function frame size | |
27 For each call | |
28 - call statement size, time and how often the parameters change | |
29 | |
30 ipa_fn_summary data structures store above information locally (i.e. | |
31 parameters of the function itself) and globally (i.e. parameters of | |
32 the function created by applying all the inline decisions already | |
33 present in the callgraph). | |
34 | |
35 We provide access to the ipa_fn_summary data structure and | |
36 basic logic updating the parameters when inlining is performed. | |
37 | |
38 The summaries are context sensitive. Context means | |
39 1) partial assignment of known constant values of operands | |
40 2) whether function is inlined into the call or not. | |
41 It is easy to add more variants. To represent function size and time | |
42 that depends on context (i.e. it is known to be optimized away when | |
43 context is known either by inlining or from IP-CP and cloning), | |
44 we use predicates. | |
45 | |
46 estimate_edge_size_and_time can be used to query | |
47 function size/time in the given context. ipa_merge_fn_summary_after_inlining merges | |
48 properties of caller and callee after inlining. | |
49 | |
50 Finally pass_inline_parameters is exported. This is used to drive | |
51 computation of function parameters used by the early inliner. IPA | |
52 inlined performs analysis via its analyze_function method. */ | |
53 | |
54 #include "config.h" | |
55 #include "system.h" | |
56 #include "coretypes.h" | |
57 #include "backend.h" | |
58 #include "tree.h" | |
59 #include "gimple.h" | |
60 #include "alloc-pool.h" | |
61 #include "tree-pass.h" | |
62 #include "ssa.h" | |
63 #include "tree-streamer.h" | |
64 #include "cgraph.h" | |
65 #include "diagnostic.h" | |
66 #include "fold-const.h" | |
67 #include "print-tree.h" | |
68 #include "tree-inline.h" | |
69 #include "gimple-pretty-print.h" | |
70 #include "params.h" | |
71 #include "cfganal.h" | |
72 #include "gimple-iterator.h" | |
73 #include "tree-cfg.h" | |
74 #include "tree-ssa-loop-niter.h" | |
75 #include "tree-ssa-loop.h" | |
76 #include "symbol-summary.h" | |
77 #include "ipa-prop.h" | |
78 #include "ipa-fnsummary.h" | |
79 #include "cfgloop.h" | |
80 #include "tree-scalar-evolution.h" | |
81 #include "ipa-utils.h" | |
82 #include "cilk.h" | |
83 #include "cfgexpand.h" | |
84 #include "gimplify.h" | |
85 #include "stringpool.h" | |
86 #include "attribs.h" | |
87 | |
88 /* Summaries. */ | |
89 function_summary <ipa_fn_summary *> *ipa_fn_summaries; | |
90 call_summary <ipa_call_summary *> *ipa_call_summaries; | |
91 | |
92 /* Edge predicates goes here. */ | |
93 static object_allocator<predicate> edge_predicate_pool ("edge predicates"); | |
94 | |
95 | |
96 /* Dump IPA hints. */ | |
97 void | |
98 ipa_dump_hints (FILE *f, ipa_hints hints) | |
99 { | |
100 if (!hints) | |
101 return; | |
102 fprintf (f, "IPA hints:"); | |
103 if (hints & INLINE_HINT_indirect_call) | |
104 { | |
105 hints &= ~INLINE_HINT_indirect_call; | |
106 fprintf (f, " indirect_call"); | |
107 } | |
108 if (hints & INLINE_HINT_loop_iterations) | |
109 { | |
110 hints &= ~INLINE_HINT_loop_iterations; | |
111 fprintf (f, " loop_iterations"); | |
112 } | |
113 if (hints & INLINE_HINT_loop_stride) | |
114 { | |
115 hints &= ~INLINE_HINT_loop_stride; | |
116 fprintf (f, " loop_stride"); | |
117 } | |
118 if (hints & INLINE_HINT_same_scc) | |
119 { | |
120 hints &= ~INLINE_HINT_same_scc; | |
121 fprintf (f, " same_scc"); | |
122 } | |
123 if (hints & INLINE_HINT_in_scc) | |
124 { | |
125 hints &= ~INLINE_HINT_in_scc; | |
126 fprintf (f, " in_scc"); | |
127 } | |
128 if (hints & INLINE_HINT_cross_module) | |
129 { | |
130 hints &= ~INLINE_HINT_cross_module; | |
131 fprintf (f, " cross_module"); | |
132 } | |
133 if (hints & INLINE_HINT_declared_inline) | |
134 { | |
135 hints &= ~INLINE_HINT_declared_inline; | |
136 fprintf (f, " declared_inline"); | |
137 } | |
138 if (hints & INLINE_HINT_array_index) | |
139 { | |
140 hints &= ~INLINE_HINT_array_index; | |
141 fprintf (f, " array_index"); | |
142 } | |
143 if (hints & INLINE_HINT_known_hot) | |
144 { | |
145 hints &= ~INLINE_HINT_known_hot; | |
146 fprintf (f, " known_hot"); | |
147 } | |
148 gcc_assert (!hints); | |
149 } | |
150 | |
151 | |
152 /* Record SIZE and TIME to SUMMARY. | |
153 The accounted code will be executed when EXEC_PRED is true. | |
154 When NONCONST_PRED is false the code will evaulate to constant and | |
155 will get optimized out in specialized clones of the function. */ | |
156 | |
157 void | |
158 ipa_fn_summary::account_size_time (int size, sreal time, | |
159 const predicate &exec_pred, | |
160 const predicate &nonconst_pred_in) | |
161 { | |
162 size_time_entry *e; | |
163 bool found = false; | |
164 int i; | |
165 predicate nonconst_pred; | |
166 | |
167 if (exec_pred == false) | |
168 return; | |
169 | |
170 nonconst_pred = nonconst_pred_in & exec_pred; | |
171 | |
172 if (nonconst_pred == false) | |
173 return; | |
174 | |
175 /* We need to create initial empty unconitional clause, but otherwie | |
176 we don't need to account empty times and sizes. */ | |
177 if (!size && time == 0 && size_time_table) | |
178 return; | |
179 | |
180 gcc_assert (time >= 0); | |
181 | |
182 for (i = 0; vec_safe_iterate (size_time_table, i, &e); i++) | |
183 if (e->exec_predicate == exec_pred | |
184 && e->nonconst_predicate == nonconst_pred) | |
185 { | |
186 found = true; | |
187 break; | |
188 } | |
189 if (i == 256) | |
190 { | |
191 i = 0; | |
192 found = true; | |
193 e = &(*size_time_table)[0]; | |
194 if (dump_file && (dump_flags & TDF_DETAILS)) | |
195 fprintf (dump_file, | |
196 "\t\tReached limit on number of entries, " | |
197 "ignoring the predicate."); | |
198 } | |
199 if (dump_file && (dump_flags & TDF_DETAILS) && (time != 0 || size)) | |
200 { | |
201 fprintf (dump_file, | |
202 "\t\tAccounting size:%3.2f, time:%3.2f on %spredicate exec:", | |
203 ((double) size) / ipa_fn_summary::size_scale, | |
204 (time.to_double ()), found ? "" : "new "); | |
205 exec_pred.dump (dump_file, conds, 0); | |
206 if (exec_pred != nonconst_pred) | |
207 { | |
208 fprintf (dump_file, " nonconst:"); | |
209 nonconst_pred.dump (dump_file, conds); | |
210 } | |
211 else | |
212 fprintf (dump_file, "\n"); | |
213 } | |
214 if (!found) | |
215 { | |
216 struct size_time_entry new_entry; | |
217 new_entry.size = size; | |
218 new_entry.time = time; | |
219 new_entry.exec_predicate = exec_pred; | |
220 new_entry.nonconst_predicate = nonconst_pred; | |
221 vec_safe_push (size_time_table, new_entry); | |
222 } | |
223 else | |
224 { | |
225 e->size += size; | |
226 e->time += time; | |
227 } | |
228 } | |
229 | |
230 /* We proved E to be unreachable, redirect it to __bultin_unreachable. */ | |
231 | |
232 static struct cgraph_edge * | |
233 redirect_to_unreachable (struct cgraph_edge *e) | |
234 { | |
235 struct cgraph_node *callee = !e->inline_failed ? e->callee : NULL; | |
236 struct cgraph_node *target = cgraph_node::get_create | |
237 (builtin_decl_implicit (BUILT_IN_UNREACHABLE)); | |
238 | |
239 if (e->speculative) | |
240 e = e->resolve_speculation (target->decl); | |
241 else if (!e->callee) | |
242 e->make_direct (target); | |
243 else | |
244 e->redirect_callee (target); | |
245 struct ipa_call_summary *es = ipa_call_summaries->get (e); | |
246 e->inline_failed = CIF_UNREACHABLE; | |
247 e->frequency = 0; | |
248 e->count = profile_count::zero (); | |
249 es->call_stmt_size = 0; | |
250 es->call_stmt_time = 0; | |
251 if (callee) | |
252 callee->remove_symbol_and_inline_clones (); | |
253 return e; | |
254 } | |
255 | |
256 /* Set predicate for edge E. */ | |
257 | |
258 static void | |
259 edge_set_predicate (struct cgraph_edge *e, predicate *predicate) | |
260 { | |
261 /* If the edge is determined to be never executed, redirect it | |
262 to BUILTIN_UNREACHABLE to make it clear to IPA passes the call will | |
263 be optimized out. */ | |
264 if (predicate && *predicate == false | |
265 /* When handling speculative edges, we need to do the redirection | |
266 just once. Do it always on the direct edge, so we do not | |
267 attempt to resolve speculation while duplicating the edge. */ | |
268 && (!e->speculative || e->callee)) | |
269 e = redirect_to_unreachable (e); | |
270 | |
271 struct ipa_call_summary *es = ipa_call_summaries->get (e); | |
272 if (predicate && *predicate != true) | |
273 { | |
274 if (!es->predicate) | |
275 es->predicate = edge_predicate_pool.allocate (); | |
276 *es->predicate = *predicate; | |
277 } | |
278 else | |
279 { | |
280 if (es->predicate) | |
281 edge_predicate_pool.remove (es->predicate); | |
282 es->predicate = NULL; | |
283 } | |
284 } | |
285 | |
286 /* Set predicate for hint *P. */ | |
287 | |
288 static void | |
289 set_hint_predicate (predicate **p, predicate new_predicate) | |
290 { | |
291 if (new_predicate == false || new_predicate == true) | |
292 { | |
293 if (*p) | |
294 edge_predicate_pool.remove (*p); | |
295 *p = NULL; | |
296 } | |
297 else | |
298 { | |
299 if (!*p) | |
300 *p = edge_predicate_pool.allocate (); | |
301 **p = new_predicate; | |
302 } | |
303 } | |
304 | |
305 | |
306 /* Compute what conditions may or may not hold given invormation about | |
307 parameters. RET_CLAUSE returns truths that may hold in a specialized copy, | |
308 whie RET_NONSPEC_CLAUSE returns truths that may hold in an nonspecialized | |
309 copy when called in a given context. It is a bitmask of conditions. Bit | |
310 0 means that condition is known to be false, while bit 1 means that condition | |
311 may or may not be true. These differs - for example NOT_INLINED condition | |
312 is always false in the second and also builtin_constant_p tests can not use | |
313 the fact that parameter is indeed a constant. | |
314 | |
315 KNOWN_VALS is partial mapping of parameters of NODE to constant values. | |
316 KNOWN_AGGS is a vector of aggreggate jump functions for each parameter. | |
317 Return clause of possible truths. When INLINE_P is true, assume that we are | |
318 inlining. | |
319 | |
320 ERROR_MARK means compile time invariant. */ | |
321 | |
322 static void | |
323 evaluate_conditions_for_known_args (struct cgraph_node *node, | |
324 bool inline_p, | |
325 vec<tree> known_vals, | |
326 vec<ipa_agg_jump_function_p> | |
327 known_aggs, | |
328 clause_t *ret_clause, | |
329 clause_t *ret_nonspec_clause) | |
330 { | |
331 clause_t clause = inline_p ? 0 : 1 << predicate::not_inlined_condition; | |
332 clause_t nonspec_clause = 1 << predicate::not_inlined_condition; | |
333 struct ipa_fn_summary *info = ipa_fn_summaries->get (node); | |
334 int i; | |
335 struct condition *c; | |
336 | |
337 for (i = 0; vec_safe_iterate (info->conds, i, &c); i++) | |
338 { | |
339 tree val; | |
340 tree res; | |
341 | |
342 /* We allow call stmt to have fewer arguments than the callee function | |
343 (especially for K&R style programs). So bound check here (we assume | |
344 known_aggs vector, if non-NULL, has the same length as | |
345 known_vals). */ | |
346 gcc_checking_assert (!known_aggs.exists () | |
347 || (known_vals.length () == known_aggs.length ())); | |
348 if (c->operand_num >= (int) known_vals.length ()) | |
349 { | |
350 clause |= 1 << (i + predicate::first_dynamic_condition); | |
351 nonspec_clause |= 1 << (i + predicate::first_dynamic_condition); | |
352 continue; | |
353 } | |
354 | |
355 if (c->agg_contents) | |
356 { | |
357 struct ipa_agg_jump_function *agg; | |
358 | |
359 if (c->code == predicate::changed | |
360 && !c->by_ref | |
361 && (known_vals[c->operand_num] == error_mark_node)) | |
362 continue; | |
363 | |
364 if (known_aggs.exists ()) | |
365 { | |
366 agg = known_aggs[c->operand_num]; | |
367 val = ipa_find_agg_cst_for_param (agg, known_vals[c->operand_num], | |
368 c->offset, c->by_ref); | |
369 } | |
370 else | |
371 val = NULL_TREE; | |
372 } | |
373 else | |
374 { | |
375 val = known_vals[c->operand_num]; | |
376 if (val == error_mark_node && c->code != predicate::changed) | |
377 val = NULL_TREE; | |
378 } | |
379 | |
380 if (!val) | |
381 { | |
382 clause |= 1 << (i + predicate::first_dynamic_condition); | |
383 nonspec_clause |= 1 << (i + predicate::first_dynamic_condition); | |
384 continue; | |
385 } | |
386 if (c->code == predicate::changed) | |
387 { | |
388 nonspec_clause |= 1 << (i + predicate::first_dynamic_condition); | |
389 continue; | |
390 } | |
391 | |
392 if (tree_to_shwi (TYPE_SIZE (TREE_TYPE (val))) != c->size) | |
393 { | |
394 clause |= 1 << (i + predicate::first_dynamic_condition); | |
395 nonspec_clause |= 1 << (i + predicate::first_dynamic_condition); | |
396 continue; | |
397 } | |
398 if (c->code == predicate::is_not_constant) | |
399 { | |
400 nonspec_clause |= 1 << (i + predicate::first_dynamic_condition); | |
401 continue; | |
402 } | |
403 | |
404 val = fold_unary (VIEW_CONVERT_EXPR, TREE_TYPE (c->val), val); | |
405 res = val | |
406 ? fold_binary_to_constant (c->code, boolean_type_node, val, c->val) | |
407 : NULL; | |
408 | |
409 if (res && integer_zerop (res)) | |
410 continue; | |
411 | |
412 clause |= 1 << (i + predicate::first_dynamic_condition); | |
413 nonspec_clause |= 1 << (i + predicate::first_dynamic_condition); | |
414 } | |
415 *ret_clause = clause; | |
416 if (ret_nonspec_clause) | |
417 *ret_nonspec_clause = nonspec_clause; | |
418 } | |
419 | |
420 | |
421 /* Work out what conditions might be true at invocation of E. */ | |
422 | |
423 void | |
424 evaluate_properties_for_edge (struct cgraph_edge *e, bool inline_p, | |
425 clause_t *clause_ptr, | |
426 clause_t *nonspec_clause_ptr, | |
427 vec<tree> *known_vals_ptr, | |
428 vec<ipa_polymorphic_call_context> | |
429 *known_contexts_ptr, | |
430 vec<ipa_agg_jump_function_p> *known_aggs_ptr) | |
431 { | |
432 struct cgraph_node *callee = e->callee->ultimate_alias_target (); | |
433 struct ipa_fn_summary *info = ipa_fn_summaries->get (callee); | |
434 vec<tree> known_vals = vNULL; | |
435 vec<ipa_agg_jump_function_p> known_aggs = vNULL; | |
436 | |
437 if (clause_ptr) | |
438 *clause_ptr = inline_p ? 0 : 1 << predicate::not_inlined_condition; | |
439 if (known_vals_ptr) | |
440 known_vals_ptr->create (0); | |
441 if (known_contexts_ptr) | |
442 known_contexts_ptr->create (0); | |
443 | |
444 if (ipa_node_params_sum | |
445 && !e->call_stmt_cannot_inline_p | |
446 && ((clause_ptr && info->conds) || known_vals_ptr || known_contexts_ptr)) | |
447 { | |
448 struct ipa_node_params *parms_info; | |
449 struct ipa_edge_args *args = IPA_EDGE_REF (e); | |
450 struct ipa_call_summary *es = ipa_call_summaries->get (e); | |
451 int i, count = ipa_get_cs_argument_count (args); | |
452 | |
453 if (e->caller->global.inlined_to) | |
454 parms_info = IPA_NODE_REF (e->caller->global.inlined_to); | |
455 else | |
456 parms_info = IPA_NODE_REF (e->caller); | |
457 | |
458 if (count && (info->conds || known_vals_ptr)) | |
459 known_vals.safe_grow_cleared (count); | |
460 if (count && (info->conds || known_aggs_ptr)) | |
461 known_aggs.safe_grow_cleared (count); | |
462 if (count && known_contexts_ptr) | |
463 known_contexts_ptr->safe_grow_cleared (count); | |
464 | |
465 for (i = 0; i < count; i++) | |
466 { | |
467 struct ipa_jump_func *jf = ipa_get_ith_jump_func (args, i); | |
468 tree cst = ipa_value_from_jfunc (parms_info, jf); | |
469 | |
470 if (!cst && e->call_stmt | |
471 && i < (int)gimple_call_num_args (e->call_stmt)) | |
472 { | |
473 cst = gimple_call_arg (e->call_stmt, i); | |
474 if (!is_gimple_min_invariant (cst)) | |
475 cst = NULL; | |
476 } | |
477 if (cst) | |
478 { | |
479 gcc_checking_assert (TREE_CODE (cst) != TREE_BINFO); | |
480 if (known_vals.exists ()) | |
481 known_vals[i] = cst; | |
482 } | |
483 else if (inline_p && !es->param[i].change_prob) | |
484 known_vals[i] = error_mark_node; | |
485 | |
486 if (known_contexts_ptr) | |
487 (*known_contexts_ptr)[i] = ipa_context_from_jfunc (parms_info, e, | |
488 i, jf); | |
489 /* TODO: When IPA-CP starts propagating and merging aggregate jump | |
490 functions, use its knowledge of the caller too, just like the | |
491 scalar case above. */ | |
492 known_aggs[i] = &jf->agg; | |
493 } | |
494 } | |
495 else if (e->call_stmt && !e->call_stmt_cannot_inline_p | |
496 && ((clause_ptr && info->conds) || known_vals_ptr)) | |
497 { | |
498 int i, count = (int)gimple_call_num_args (e->call_stmt); | |
499 | |
500 if (count && (info->conds || known_vals_ptr)) | |
501 known_vals.safe_grow_cleared (count); | |
502 for (i = 0; i < count; i++) | |
503 { | |
504 tree cst = gimple_call_arg (e->call_stmt, i); | |
505 if (!is_gimple_min_invariant (cst)) | |
506 cst = NULL; | |
507 if (cst) | |
508 known_vals[i] = cst; | |
509 } | |
510 } | |
511 | |
512 evaluate_conditions_for_known_args (callee, inline_p, | |
513 known_vals, known_aggs, clause_ptr, | |
514 nonspec_clause_ptr); | |
515 | |
516 if (known_vals_ptr) | |
517 *known_vals_ptr = known_vals; | |
518 else | |
519 known_vals.release (); | |
520 | |
521 if (known_aggs_ptr) | |
522 *known_aggs_ptr = known_aggs; | |
523 else | |
524 known_aggs.release (); | |
525 } | |
526 | |
527 | |
528 /* Allocate the function summary. */ | |
529 | |
530 static void | |
531 ipa_fn_summary_alloc (void) | |
532 { | |
533 gcc_checking_assert (!ipa_fn_summaries); | |
534 ipa_fn_summaries = ipa_fn_summary_t::create_ggc (symtab); | |
535 ipa_call_summaries = new ipa_call_summary_t (symtab, false); | |
536 } | |
537 | |
538 /* We are called multiple time for given function; clear | |
539 data from previous run so they are not cumulated. */ | |
540 | |
541 void | |
542 ipa_call_summary::reset () | |
543 { | |
544 call_stmt_size = call_stmt_time = 0; | |
545 if (predicate) | |
546 edge_predicate_pool.remove (predicate); | |
547 predicate = NULL; | |
548 param.release (); | |
549 } | |
550 | |
551 /* We are called multiple time for given function; clear | |
552 data from previous run so they are not cumulated. */ | |
553 | |
554 void | |
555 ipa_fn_summary::reset (struct cgraph_node *node) | |
556 { | |
557 struct cgraph_edge *e; | |
558 | |
559 self_size = 0; | |
560 estimated_stack_size = 0; | |
561 estimated_self_stack_size = 0; | |
562 stack_frame_offset = 0; | |
563 size = 0; | |
564 time = 0; | |
565 growth = 0; | |
566 scc_no = 0; | |
567 if (loop_iterations) | |
568 { | |
569 edge_predicate_pool.remove (loop_iterations); | |
570 loop_iterations = NULL; | |
571 } | |
572 if (loop_stride) | |
573 { | |
574 edge_predicate_pool.remove (loop_stride); | |
575 loop_stride = NULL; | |
576 } | |
577 if (array_index) | |
578 { | |
579 edge_predicate_pool.remove (array_index); | |
580 array_index = NULL; | |
581 } | |
582 vec_free (conds); | |
583 vec_free (size_time_table); | |
584 for (e = node->callees; e; e = e->next_callee) | |
585 ipa_call_summaries->get (e)->reset (); | |
586 for (e = node->indirect_calls; e; e = e->next_callee) | |
587 ipa_call_summaries->get (e)->reset (); | |
588 fp_expressions = false; | |
589 } | |
590 | |
591 /* Hook that is called by cgraph.c when a node is removed. */ | |
592 | |
593 void | |
594 ipa_fn_summary_t::remove (cgraph_node *node, ipa_fn_summary *info) | |
595 { | |
596 info->reset (node); | |
597 } | |
598 | |
599 /* Same as remap_predicate_after_duplication but handle hint predicate *P. | |
600 Additionally care about allocating new memory slot for updated predicate | |
601 and set it to NULL when it becomes true or false (and thus uninteresting). | |
602 */ | |
603 | |
604 static void | |
605 remap_hint_predicate_after_duplication (predicate **p, | |
606 clause_t possible_truths) | |
607 { | |
608 predicate new_predicate; | |
609 | |
610 if (!*p) | |
611 return; | |
612 | |
613 new_predicate = (*p)->remap_after_duplication (possible_truths); | |
614 /* We do not want to free previous predicate; it is used by node origin. */ | |
615 *p = NULL; | |
616 set_hint_predicate (p, new_predicate); | |
617 } | |
618 | |
619 | |
620 /* Hook that is called by cgraph.c when a node is duplicated. */ | |
621 void | |
622 ipa_fn_summary_t::duplicate (cgraph_node *src, | |
623 cgraph_node *dst, | |
624 ipa_fn_summary *, | |
625 ipa_fn_summary *info) | |
626 { | |
627 memcpy (info, ipa_fn_summaries->get (src), sizeof (ipa_fn_summary)); | |
628 /* TODO: as an optimization, we may avoid copying conditions | |
629 that are known to be false or true. */ | |
630 info->conds = vec_safe_copy (info->conds); | |
631 | |
632 /* When there are any replacements in the function body, see if we can figure | |
633 out that something was optimized out. */ | |
634 if (ipa_node_params_sum && dst->clone.tree_map) | |
635 { | |
636 vec<size_time_entry, va_gc> *entry = info->size_time_table; | |
637 /* Use SRC parm info since it may not be copied yet. */ | |
638 struct ipa_node_params *parms_info = IPA_NODE_REF (src); | |
639 vec<tree> known_vals = vNULL; | |
640 int count = ipa_get_param_count (parms_info); | |
641 int i, j; | |
642 clause_t possible_truths; | |
643 predicate true_pred = true; | |
644 size_time_entry *e; | |
645 int optimized_out_size = 0; | |
646 bool inlined_to_p = false; | |
647 struct cgraph_edge *edge, *next; | |
648 | |
649 info->size_time_table = 0; | |
650 known_vals.safe_grow_cleared (count); | |
651 for (i = 0; i < count; i++) | |
652 { | |
653 struct ipa_replace_map *r; | |
654 | |
655 for (j = 0; vec_safe_iterate (dst->clone.tree_map, j, &r); j++) | |
656 { | |
657 if (((!r->old_tree && r->parm_num == i) | |
658 || (r->old_tree && r->old_tree == ipa_get_param (parms_info, i))) | |
659 && r->replace_p && !r->ref_p) | |
660 { | |
661 known_vals[i] = r->new_tree; | |
662 break; | |
663 } | |
664 } | |
665 } | |
666 evaluate_conditions_for_known_args (dst, false, | |
667 known_vals, | |
668 vNULL, | |
669 &possible_truths, | |
670 /* We are going to specialize, | |
671 so ignore nonspec truths. */ | |
672 NULL); | |
673 known_vals.release (); | |
674 | |
675 info->account_size_time (0, 0, true_pred, true_pred); | |
676 | |
677 /* Remap size_time vectors. | |
678 Simplify the predicate by prunning out alternatives that are known | |
679 to be false. | |
680 TODO: as on optimization, we can also eliminate conditions known | |
681 to be true. */ | |
682 for (i = 0; vec_safe_iterate (entry, i, &e); i++) | |
683 { | |
684 predicate new_exec_pred; | |
685 predicate new_nonconst_pred; | |
686 new_exec_pred = e->exec_predicate.remap_after_duplication | |
687 (possible_truths); | |
688 new_nonconst_pred = e->nonconst_predicate.remap_after_duplication | |
689 (possible_truths); | |
690 if (new_exec_pred == false || new_nonconst_pred == false) | |
691 optimized_out_size += e->size; | |
692 else | |
693 info->account_size_time (e->size, e->time, new_exec_pred, | |
694 new_nonconst_pred); | |
695 } | |
696 | |
697 /* Remap edge predicates with the same simplification as above. | |
698 Also copy constantness arrays. */ | |
699 for (edge = dst->callees; edge; edge = next) | |
700 { | |
701 predicate new_predicate; | |
702 struct ipa_call_summary *es = ipa_call_summaries->get (edge); | |
703 next = edge->next_callee; | |
704 | |
705 if (!edge->inline_failed) | |
706 inlined_to_p = true; | |
707 if (!es->predicate) | |
708 continue; | |
709 new_predicate = es->predicate->remap_after_duplication | |
710 (possible_truths); | |
711 if (new_predicate == false && *es->predicate != false) | |
712 optimized_out_size += es->call_stmt_size * ipa_fn_summary::size_scale; | |
713 edge_set_predicate (edge, &new_predicate); | |
714 } | |
715 | |
716 /* Remap indirect edge predicates with the same simplificaiton as above. | |
717 Also copy constantness arrays. */ | |
718 for (edge = dst->indirect_calls; edge; edge = next) | |
719 { | |
720 predicate new_predicate; | |
721 struct ipa_call_summary *es = ipa_call_summaries->get (edge); | |
722 next = edge->next_callee; | |
723 | |
724 gcc_checking_assert (edge->inline_failed); | |
725 if (!es->predicate) | |
726 continue; | |
727 new_predicate = es->predicate->remap_after_duplication | |
728 (possible_truths); | |
729 if (new_predicate == false && *es->predicate != false) | |
730 optimized_out_size += es->call_stmt_size * ipa_fn_summary::size_scale; | |
731 edge_set_predicate (edge, &new_predicate); | |
732 } | |
733 remap_hint_predicate_after_duplication (&info->loop_iterations, | |
734 possible_truths); | |
735 remap_hint_predicate_after_duplication (&info->loop_stride, | |
736 possible_truths); | |
737 remap_hint_predicate_after_duplication (&info->array_index, | |
738 possible_truths); | |
739 | |
740 /* If inliner or someone after inliner will ever start producing | |
741 non-trivial clones, we will get trouble with lack of information | |
742 about updating self sizes, because size vectors already contains | |
743 sizes of the calees. */ | |
744 gcc_assert (!inlined_to_p || !optimized_out_size); | |
745 } | |
746 else | |
747 { | |
748 info->size_time_table = vec_safe_copy (info->size_time_table); | |
749 if (info->loop_iterations) | |
750 { | |
751 predicate p = *info->loop_iterations; | |
752 info->loop_iterations = NULL; | |
753 set_hint_predicate (&info->loop_iterations, p); | |
754 } | |
755 if (info->loop_stride) | |
756 { | |
757 predicate p = *info->loop_stride; | |
758 info->loop_stride = NULL; | |
759 set_hint_predicate (&info->loop_stride, p); | |
760 } | |
761 if (info->array_index) | |
762 { | |
763 predicate p = *info->array_index; | |
764 info->array_index = NULL; | |
765 set_hint_predicate (&info->array_index, p); | |
766 } | |
767 } | |
768 if (!dst->global.inlined_to) | |
769 ipa_update_overall_fn_summary (dst); | |
770 } | |
771 | |
772 | |
773 /* Hook that is called by cgraph.c when a node is duplicated. */ | |
774 | |
775 void | |
776 ipa_call_summary_t::duplicate (struct cgraph_edge *src, | |
777 struct cgraph_edge *dst, | |
778 struct ipa_call_summary *srcinfo, | |
779 struct ipa_call_summary *info) | |
780 { | |
781 *info = *srcinfo; | |
782 info->predicate = NULL; | |
783 edge_set_predicate (dst, srcinfo->predicate); | |
784 info->param = srcinfo->param.copy (); | |
785 if (!dst->indirect_unknown_callee && src->indirect_unknown_callee) | |
786 { | |
787 info->call_stmt_size -= (eni_size_weights.indirect_call_cost | |
788 - eni_size_weights.call_cost); | |
789 info->call_stmt_time -= (eni_time_weights.indirect_call_cost | |
790 - eni_time_weights.call_cost); | |
791 } | |
792 } | |
793 | |
794 | |
795 /* Keep edge cache consistent across edge removal. */ | |
796 | |
797 void | |
798 ipa_call_summary_t::remove (struct cgraph_edge *, | |
799 struct ipa_call_summary *sum) | |
800 { | |
801 sum->reset (); | |
802 } | |
803 | |
804 | |
805 /* Dump edge summaries associated to NODE and recursively to all clones. | |
806 Indent by INDENT. */ | |
807 | |
808 static void | |
809 dump_ipa_call_summary (FILE *f, int indent, struct cgraph_node *node, | |
810 struct ipa_fn_summary *info) | |
811 { | |
812 struct cgraph_edge *edge; | |
813 for (edge = node->callees; edge; edge = edge->next_callee) | |
814 { | |
815 struct ipa_call_summary *es = ipa_call_summaries->get (edge); | |
816 struct cgraph_node *callee = edge->callee->ultimate_alias_target (); | |
817 int i; | |
818 | |
819 fprintf (f, | |
820 "%*s%s/%i %s\n%*s loop depth:%2i freq:%4i size:%2i" | |
821 " time: %2i callee size:%2i stack:%2i", | |
822 indent, "", callee->name (), callee->order, | |
823 !edge->inline_failed | |
824 ? "inlined" : cgraph_inline_failed_string (edge-> inline_failed), | |
825 indent, "", es->loop_depth, edge->frequency, | |
826 es->call_stmt_size, es->call_stmt_time, | |
827 (int) ipa_fn_summaries->get (callee)->size / ipa_fn_summary::size_scale, | |
828 (int) ipa_fn_summaries->get (callee)->estimated_stack_size); | |
829 | |
830 if (es->predicate) | |
831 { | |
832 fprintf (f, " predicate: "); | |
833 es->predicate->dump (f, info->conds); | |
834 } | |
835 else | |
836 fprintf (f, "\n"); | |
837 if (es->param.exists ()) | |
838 for (i = 0; i < (int) es->param.length (); i++) | |
839 { | |
840 int prob = es->param[i].change_prob; | |
841 | |
842 if (!prob) | |
843 fprintf (f, "%*s op%i is compile time invariant\n", | |
844 indent + 2, "", i); | |
845 else if (prob != REG_BR_PROB_BASE) | |
846 fprintf (f, "%*s op%i change %f%% of time\n", indent + 2, "", i, | |
847 prob * 100.0 / REG_BR_PROB_BASE); | |
848 } | |
849 if (!edge->inline_failed) | |
850 { | |
851 fprintf (f, "%*sStack frame offset %i, callee self size %i," | |
852 " callee size %i\n", | |
853 indent + 2, "", | |
854 (int) ipa_fn_summaries->get (callee)->stack_frame_offset, | |
855 (int) ipa_fn_summaries->get (callee)->estimated_self_stack_size, | |
856 (int) ipa_fn_summaries->get (callee)->estimated_stack_size); | |
857 dump_ipa_call_summary (f, indent + 2, callee, info); | |
858 } | |
859 } | |
860 for (edge = node->indirect_calls; edge; edge = edge->next_callee) | |
861 { | |
862 struct ipa_call_summary *es = ipa_call_summaries->get (edge); | |
863 fprintf (f, "%*sindirect call loop depth:%2i freq:%4i size:%2i" | |
864 " time: %2i", | |
865 indent, "", | |
866 es->loop_depth, | |
867 edge->frequency, es->call_stmt_size, es->call_stmt_time); | |
868 if (es->predicate) | |
869 { | |
870 fprintf (f, "predicate: "); | |
871 es->predicate->dump (f, info->conds); | |
872 } | |
873 else | |
874 fprintf (f, "\n"); | |
875 } | |
876 } | |
877 | |
878 | |
879 void | |
880 ipa_dump_fn_summary (FILE *f, struct cgraph_node *node) | |
881 { | |
882 if (node->definition) | |
883 { | |
884 struct ipa_fn_summary *s = ipa_fn_summaries->get (node); | |
885 size_time_entry *e; | |
886 int i; | |
887 fprintf (f, "IPA function summary for %s/%i", node->name (), | |
888 node->order); | |
889 if (DECL_DISREGARD_INLINE_LIMITS (node->decl)) | |
890 fprintf (f, " always_inline"); | |
891 if (s->inlinable) | |
892 fprintf (f, " inlinable"); | |
893 if (s->contains_cilk_spawn) | |
894 fprintf (f, " contains_cilk_spawn"); | |
895 if (s->fp_expressions) | |
896 fprintf (f, " fp_expression"); | |
897 fprintf (f, "\n global time: %f\n", s->time.to_double ()); | |
898 fprintf (f, " self size: %i\n", s->self_size); | |
899 fprintf (f, " global size: %i\n", s->size); | |
900 fprintf (f, " min size: %i\n", s->min_size); | |
901 fprintf (f, " self stack: %i\n", | |
902 (int) s->estimated_self_stack_size); | |
903 fprintf (f, " global stack: %i\n", (int) s->estimated_stack_size); | |
904 if (s->growth) | |
905 fprintf (f, " estimated growth:%i\n", (int) s->growth); | |
906 if (s->scc_no) | |
907 fprintf (f, " In SCC: %i\n", (int) s->scc_no); | |
908 for (i = 0; vec_safe_iterate (s->size_time_table, i, &e); i++) | |
909 { | |
910 fprintf (f, " size:%f, time:%f", | |
911 (double) e->size / ipa_fn_summary::size_scale, | |
912 e->time.to_double ()); | |
913 if (e->exec_predicate != true) | |
914 { | |
915 fprintf (f, ", executed if:"); | |
916 e->exec_predicate.dump (f, s->conds, 0); | |
917 } | |
918 if (e->exec_predicate != e->nonconst_predicate) | |
919 { | |
920 fprintf (f, ", nonconst if:"); | |
921 e->nonconst_predicate.dump (f, s->conds, 0); | |
922 } | |
923 fprintf (f, "\n"); | |
924 } | |
925 if (s->loop_iterations) | |
926 { | |
927 fprintf (f, " loop iterations:"); | |
928 s->loop_iterations->dump (f, s->conds); | |
929 } | |
930 if (s->loop_stride) | |
931 { | |
932 fprintf (f, " loop stride:"); | |
933 s->loop_stride->dump (f, s->conds); | |
934 } | |
935 if (s->array_index) | |
936 { | |
937 fprintf (f, " array index:"); | |
938 s->array_index->dump (f, s->conds); | |
939 } | |
940 fprintf (f, " calls:\n"); | |
941 dump_ipa_call_summary (f, 4, node, s); | |
942 fprintf (f, "\n"); | |
943 } | |
944 } | |
945 | |
946 DEBUG_FUNCTION void | |
947 ipa_debug_fn_summary (struct cgraph_node *node) | |
948 { | |
949 ipa_dump_fn_summary (stderr, node); | |
950 } | |
951 | |
952 void | |
953 ipa_dump_fn_summaries (FILE *f) | |
954 { | |
955 struct cgraph_node *node; | |
956 | |
957 FOR_EACH_DEFINED_FUNCTION (node) | |
958 if (!node->global.inlined_to) | |
959 ipa_dump_fn_summary (f, node); | |
960 } | |
961 | |
962 /* Callback of walk_aliased_vdefs. Flags that it has been invoked to the | |
963 boolean variable pointed to by DATA. */ | |
964 | |
965 static bool | |
966 mark_modified (ao_ref *ao ATTRIBUTE_UNUSED, tree vdef ATTRIBUTE_UNUSED, | |
967 void *data) | |
968 { | |
969 bool *b = (bool *) data; | |
970 *b = true; | |
971 return true; | |
972 } | |
973 | |
974 /* If OP refers to value of function parameter, return the corresponding | |
975 parameter. If non-NULL, the size of the memory load (or the SSA_NAME of the | |
976 PARM_DECL) will be stored to *SIZE_P in that case too. */ | |
977 | |
978 static tree | |
979 unmodified_parm_1 (gimple *stmt, tree op, HOST_WIDE_INT *size_p) | |
980 { | |
981 /* SSA_NAME referring to parm default def? */ | |
982 if (TREE_CODE (op) == SSA_NAME | |
983 && SSA_NAME_IS_DEFAULT_DEF (op) | |
984 && TREE_CODE (SSA_NAME_VAR (op)) == PARM_DECL) | |
985 { | |
986 if (size_p) | |
987 *size_p = tree_to_shwi (TYPE_SIZE (TREE_TYPE (op))); | |
988 return SSA_NAME_VAR (op); | |
989 } | |
990 /* Non-SSA parm reference? */ | |
991 if (TREE_CODE (op) == PARM_DECL) | |
992 { | |
993 bool modified = false; | |
994 | |
995 ao_ref refd; | |
996 ao_ref_init (&refd, op); | |
997 walk_aliased_vdefs (&refd, gimple_vuse (stmt), mark_modified, &modified, | |
998 NULL); | |
999 if (!modified) | |
1000 { | |
1001 if (size_p) | |
1002 *size_p = tree_to_shwi (TYPE_SIZE (TREE_TYPE (op))); | |
1003 return op; | |
1004 } | |
1005 } | |
1006 return NULL_TREE; | |
1007 } | |
1008 | |
1009 /* If OP refers to value of function parameter, return the corresponding | |
1010 parameter. Also traverse chains of SSA register assignments. If non-NULL, | |
1011 the size of the memory load (or the SSA_NAME of the PARM_DECL) will be | |
1012 stored to *SIZE_P in that case too. */ | |
1013 | |
1014 static tree | |
1015 unmodified_parm (gimple *stmt, tree op, HOST_WIDE_INT *size_p) | |
1016 { | |
1017 tree res = unmodified_parm_1 (stmt, op, size_p); | |
1018 if (res) | |
1019 return res; | |
1020 | |
1021 if (TREE_CODE (op) == SSA_NAME | |
1022 && !SSA_NAME_IS_DEFAULT_DEF (op) | |
1023 && gimple_assign_single_p (SSA_NAME_DEF_STMT (op))) | |
1024 return unmodified_parm (SSA_NAME_DEF_STMT (op), | |
1025 gimple_assign_rhs1 (SSA_NAME_DEF_STMT (op)), | |
1026 size_p); | |
1027 return NULL_TREE; | |
1028 } | |
1029 | |
1030 /* If OP refers to a value of a function parameter or value loaded from an | |
1031 aggregate passed to a parameter (either by value or reference), return TRUE | |
1032 and store the number of the parameter to *INDEX_P, the access size into | |
1033 *SIZE_P, and information whether and how it has been loaded from an | |
1034 aggregate into *AGGPOS. INFO describes the function parameters, STMT is the | |
1035 statement in which OP is used or loaded. */ | |
1036 | |
1037 static bool | |
1038 unmodified_parm_or_parm_agg_item (struct ipa_func_body_info *fbi, | |
1039 gimple *stmt, tree op, int *index_p, | |
1040 HOST_WIDE_INT *size_p, | |
1041 struct agg_position_info *aggpos) | |
1042 { | |
1043 tree res = unmodified_parm_1 (stmt, op, size_p); | |
1044 | |
1045 gcc_checking_assert (aggpos); | |
1046 if (res) | |
1047 { | |
1048 *index_p = ipa_get_param_decl_index (fbi->info, res); | |
1049 if (*index_p < 0) | |
1050 return false; | |
1051 aggpos->agg_contents = false; | |
1052 aggpos->by_ref = false; | |
1053 return true; | |
1054 } | |
1055 | |
1056 if (TREE_CODE (op) == SSA_NAME) | |
1057 { | |
1058 if (SSA_NAME_IS_DEFAULT_DEF (op) | |
1059 || !gimple_assign_single_p (SSA_NAME_DEF_STMT (op))) | |
1060 return false; | |
1061 stmt = SSA_NAME_DEF_STMT (op); | |
1062 op = gimple_assign_rhs1 (stmt); | |
1063 if (!REFERENCE_CLASS_P (op)) | |
1064 return unmodified_parm_or_parm_agg_item (fbi, stmt, op, index_p, size_p, | |
1065 aggpos); | |
1066 } | |
1067 | |
1068 aggpos->agg_contents = true; | |
1069 return ipa_load_from_parm_agg (fbi, fbi->info->descriptors, | |
1070 stmt, op, index_p, &aggpos->offset, | |
1071 size_p, &aggpos->by_ref); | |
1072 } | |
1073 | |
1074 /* See if statement might disappear after inlining. | |
1075 0 - means not eliminated | |
1076 1 - half of statements goes away | |
1077 2 - for sure it is eliminated. | |
1078 We are not terribly sophisticated, basically looking for simple abstraction | |
1079 penalty wrappers. */ | |
1080 | |
1081 static int | |
1082 eliminated_by_inlining_prob (gimple *stmt) | |
1083 { | |
1084 enum gimple_code code = gimple_code (stmt); | |
1085 enum tree_code rhs_code; | |
1086 | |
1087 if (!optimize) | |
1088 return 0; | |
1089 | |
1090 switch (code) | |
1091 { | |
1092 case GIMPLE_RETURN: | |
1093 return 2; | |
1094 case GIMPLE_ASSIGN: | |
1095 if (gimple_num_ops (stmt) != 2) | |
1096 return 0; | |
1097 | |
1098 rhs_code = gimple_assign_rhs_code (stmt); | |
1099 | |
1100 /* Casts of parameters, loads from parameters passed by reference | |
1101 and stores to return value or parameters are often free after | |
1102 inlining dua to SRA and further combining. | |
1103 Assume that half of statements goes away. */ | |
1104 if (CONVERT_EXPR_CODE_P (rhs_code) | |
1105 || rhs_code == VIEW_CONVERT_EXPR | |
1106 || rhs_code == ADDR_EXPR | |
1107 || gimple_assign_rhs_class (stmt) == GIMPLE_SINGLE_RHS) | |
1108 { | |
1109 tree rhs = gimple_assign_rhs1 (stmt); | |
1110 tree lhs = gimple_assign_lhs (stmt); | |
1111 tree inner_rhs = get_base_address (rhs); | |
1112 tree inner_lhs = get_base_address (lhs); | |
1113 bool rhs_free = false; | |
1114 bool lhs_free = false; | |
1115 | |
1116 if (!inner_rhs) | |
1117 inner_rhs = rhs; | |
1118 if (!inner_lhs) | |
1119 inner_lhs = lhs; | |
1120 | |
1121 /* Reads of parameter are expected to be free. */ | |
1122 if (unmodified_parm (stmt, inner_rhs, NULL)) | |
1123 rhs_free = true; | |
1124 /* Match expressions of form &this->field. Those will most likely | |
1125 combine with something upstream after inlining. */ | |
1126 else if (TREE_CODE (inner_rhs) == ADDR_EXPR) | |
1127 { | |
1128 tree op = get_base_address (TREE_OPERAND (inner_rhs, 0)); | |
1129 if (TREE_CODE (op) == PARM_DECL) | |
1130 rhs_free = true; | |
1131 else if (TREE_CODE (op) == MEM_REF | |
1132 && unmodified_parm (stmt, TREE_OPERAND (op, 0), NULL)) | |
1133 rhs_free = true; | |
1134 } | |
1135 | |
1136 /* When parameter is not SSA register because its address is taken | |
1137 and it is just copied into one, the statement will be completely | |
1138 free after inlining (we will copy propagate backward). */ | |
1139 if (rhs_free && is_gimple_reg (lhs)) | |
1140 return 2; | |
1141 | |
1142 /* Reads of parameters passed by reference | |
1143 expected to be free (i.e. optimized out after inlining). */ | |
1144 if (TREE_CODE (inner_rhs) == MEM_REF | |
1145 && unmodified_parm (stmt, TREE_OPERAND (inner_rhs, 0), NULL)) | |
1146 rhs_free = true; | |
1147 | |
1148 /* Copying parameter passed by reference into gimple register is | |
1149 probably also going to copy propagate, but we can't be quite | |
1150 sure. */ | |
1151 if (rhs_free && is_gimple_reg (lhs)) | |
1152 lhs_free = true; | |
1153 | |
1154 /* Writes to parameters, parameters passed by value and return value | |
1155 (either dirrectly or passed via invisible reference) are free. | |
1156 | |
1157 TODO: We ought to handle testcase like | |
1158 struct a {int a,b;}; | |
1159 struct a | |
1160 retrurnsturct (void) | |
1161 { | |
1162 struct a a ={1,2}; | |
1163 return a; | |
1164 } | |
1165 | |
1166 This translate into: | |
1167 | |
1168 retrurnsturct () | |
1169 { | |
1170 int a$b; | |
1171 int a$a; | |
1172 struct a a; | |
1173 struct a D.2739; | |
1174 | |
1175 <bb 2>: | |
1176 D.2739.a = 1; | |
1177 D.2739.b = 2; | |
1178 return D.2739; | |
1179 | |
1180 } | |
1181 For that we either need to copy ipa-split logic detecting writes | |
1182 to return value. */ | |
1183 if (TREE_CODE (inner_lhs) == PARM_DECL | |
1184 || TREE_CODE (inner_lhs) == RESULT_DECL | |
1185 || (TREE_CODE (inner_lhs) == MEM_REF | |
1186 && (unmodified_parm (stmt, TREE_OPERAND (inner_lhs, 0), NULL) | |
1187 || (TREE_CODE (TREE_OPERAND (inner_lhs, 0)) == SSA_NAME | |
1188 && SSA_NAME_VAR (TREE_OPERAND (inner_lhs, 0)) | |
1189 && TREE_CODE (SSA_NAME_VAR (TREE_OPERAND | |
1190 (inner_lhs, | |
1191 0))) == RESULT_DECL)))) | |
1192 lhs_free = true; | |
1193 if (lhs_free | |
1194 && (is_gimple_reg (rhs) || is_gimple_min_invariant (rhs))) | |
1195 rhs_free = true; | |
1196 if (lhs_free && rhs_free) | |
1197 return 1; | |
1198 } | |
1199 return 0; | |
1200 default: | |
1201 return 0; | |
1202 } | |
1203 } | |
1204 | |
1205 | |
1206 /* If BB ends by a conditional we can turn into predicates, attach corresponding | |
1207 predicates to the CFG edges. */ | |
1208 | |
1209 static void | |
1210 set_cond_stmt_execution_predicate (struct ipa_func_body_info *fbi, | |
1211 struct ipa_fn_summary *summary, | |
1212 basic_block bb) | |
1213 { | |
1214 gimple *last; | |
1215 tree op; | |
1216 int index; | |
1217 HOST_WIDE_INT size; | |
1218 struct agg_position_info aggpos; | |
1219 enum tree_code code, inverted_code; | |
1220 edge e; | |
1221 edge_iterator ei; | |
1222 gimple *set_stmt; | |
1223 tree op2; | |
1224 | |
1225 last = last_stmt (bb); | |
1226 if (!last || gimple_code (last) != GIMPLE_COND) | |
1227 return; | |
1228 if (!is_gimple_ip_invariant (gimple_cond_rhs (last))) | |
1229 return; | |
1230 op = gimple_cond_lhs (last); | |
1231 /* TODO: handle conditionals like | |
1232 var = op0 < 4; | |
1233 if (var != 0). */ | |
1234 if (unmodified_parm_or_parm_agg_item (fbi, last, op, &index, &size, &aggpos)) | |
1235 { | |
1236 code = gimple_cond_code (last); | |
1237 inverted_code = invert_tree_comparison (code, HONOR_NANS (op)); | |
1238 | |
1239 FOR_EACH_EDGE (e, ei, bb->succs) | |
1240 { | |
1241 enum tree_code this_code = (e->flags & EDGE_TRUE_VALUE | |
1242 ? code : inverted_code); | |
1243 /* invert_tree_comparison will return ERROR_MARK on FP | |
1244 comparsions that are not EQ/NE instead of returning proper | |
1245 unordered one. Be sure it is not confused with NON_CONSTANT. */ | |
1246 if (this_code != ERROR_MARK) | |
1247 { | |
1248 predicate p | |
1249 = add_condition (summary, index, size, &aggpos, this_code, | |
1250 unshare_expr_without_location | |
1251 (gimple_cond_rhs (last))); | |
1252 e->aux = edge_predicate_pool.allocate (); | |
1253 *(predicate *) e->aux = p; | |
1254 } | |
1255 } | |
1256 } | |
1257 | |
1258 if (TREE_CODE (op) != SSA_NAME) | |
1259 return; | |
1260 /* Special case | |
1261 if (builtin_constant_p (op)) | |
1262 constant_code | |
1263 else | |
1264 nonconstant_code. | |
1265 Here we can predicate nonconstant_code. We can't | |
1266 really handle constant_code since we have no predicate | |
1267 for this and also the constant code is not known to be | |
1268 optimized away when inliner doen't see operand is constant. | |
1269 Other optimizers might think otherwise. */ | |
1270 if (gimple_cond_code (last) != NE_EXPR | |
1271 || !integer_zerop (gimple_cond_rhs (last))) | |
1272 return; | |
1273 set_stmt = SSA_NAME_DEF_STMT (op); | |
1274 if (!gimple_call_builtin_p (set_stmt, BUILT_IN_CONSTANT_P) | |
1275 || gimple_call_num_args (set_stmt) != 1) | |
1276 return; | |
1277 op2 = gimple_call_arg (set_stmt, 0); | |
1278 if (!unmodified_parm_or_parm_agg_item (fbi, set_stmt, op2, &index, &size, | |
1279 &aggpos)) | |
1280 return; | |
1281 FOR_EACH_EDGE (e, ei, bb->succs) if (e->flags & EDGE_FALSE_VALUE) | |
1282 { | |
1283 predicate p = add_condition (summary, index, size, &aggpos, | |
1284 predicate::is_not_constant, NULL_TREE); | |
1285 e->aux = edge_predicate_pool.allocate (); | |
1286 *(predicate *) e->aux = p; | |
1287 } | |
1288 } | |
1289 | |
1290 | |
1291 /* If BB ends by a switch we can turn into predicates, attach corresponding | |
1292 predicates to the CFG edges. */ | |
1293 | |
1294 static void | |
1295 set_switch_stmt_execution_predicate (struct ipa_func_body_info *fbi, | |
1296 struct ipa_fn_summary *summary, | |
1297 basic_block bb) | |
1298 { | |
1299 gimple *lastg; | |
1300 tree op; | |
1301 int index; | |
1302 HOST_WIDE_INT size; | |
1303 struct agg_position_info aggpos; | |
1304 edge e; | |
1305 edge_iterator ei; | |
1306 size_t n; | |
1307 size_t case_idx; | |
1308 | |
1309 lastg = last_stmt (bb); | |
1310 if (!lastg || gimple_code (lastg) != GIMPLE_SWITCH) | |
1311 return; | |
1312 gswitch *last = as_a <gswitch *> (lastg); | |
1313 op = gimple_switch_index (last); | |
1314 if (!unmodified_parm_or_parm_agg_item (fbi, last, op, &index, &size, &aggpos)) | |
1315 return; | |
1316 | |
1317 FOR_EACH_EDGE (e, ei, bb->succs) | |
1318 { | |
1319 e->aux = edge_predicate_pool.allocate (); | |
1320 *(predicate *) e->aux = false; | |
1321 } | |
1322 n = gimple_switch_num_labels (last); | |
1323 for (case_idx = 0; case_idx < n; ++case_idx) | |
1324 { | |
1325 tree cl = gimple_switch_label (last, case_idx); | |
1326 tree min, max; | |
1327 predicate p; | |
1328 | |
1329 e = find_edge (bb, label_to_block (CASE_LABEL (cl))); | |
1330 min = CASE_LOW (cl); | |
1331 max = CASE_HIGH (cl); | |
1332 | |
1333 /* For default we might want to construct predicate that none | |
1334 of cases is met, but it is bit hard to do not having negations | |
1335 of conditionals handy. */ | |
1336 if (!min && !max) | |
1337 p = true; | |
1338 else if (!max) | |
1339 p = add_condition (summary, index, size, &aggpos, EQ_EXPR, | |
1340 unshare_expr_without_location (min)); | |
1341 else | |
1342 { | |
1343 predicate p1, p2; | |
1344 p1 = add_condition (summary, index, size, &aggpos, GE_EXPR, | |
1345 unshare_expr_without_location (min)); | |
1346 p2 = add_condition (summary, index, size, &aggpos, LE_EXPR, | |
1347 unshare_expr_without_location (max)); | |
1348 p = p1 & p2; | |
1349 } | |
1350 *(struct predicate *) e->aux | |
1351 = p.or_with (summary->conds, *(struct predicate *) e->aux); | |
1352 } | |
1353 } | |
1354 | |
1355 | |
1356 /* For each BB in NODE attach to its AUX pointer predicate under | |
1357 which it is executable. */ | |
1358 | |
1359 static void | |
1360 compute_bb_predicates (struct ipa_func_body_info *fbi, | |
1361 struct cgraph_node *node, | |
1362 struct ipa_fn_summary *summary) | |
1363 { | |
1364 struct function *my_function = DECL_STRUCT_FUNCTION (node->decl); | |
1365 bool done = false; | |
1366 basic_block bb; | |
1367 | |
1368 FOR_EACH_BB_FN (bb, my_function) | |
1369 { | |
1370 set_cond_stmt_execution_predicate (fbi, summary, bb); | |
1371 set_switch_stmt_execution_predicate (fbi, summary, bb); | |
1372 } | |
1373 | |
1374 /* Entry block is always executable. */ | |
1375 ENTRY_BLOCK_PTR_FOR_FN (my_function)->aux | |
1376 = edge_predicate_pool.allocate (); | |
1377 *(predicate *) ENTRY_BLOCK_PTR_FOR_FN (my_function)->aux = true; | |
1378 | |
1379 /* A simple dataflow propagation of predicates forward in the CFG. | |
1380 TODO: work in reverse postorder. */ | |
1381 while (!done) | |
1382 { | |
1383 done = true; | |
1384 FOR_EACH_BB_FN (bb, my_function) | |
1385 { | |
1386 predicate p = false; | |
1387 edge e; | |
1388 edge_iterator ei; | |
1389 FOR_EACH_EDGE (e, ei, bb->preds) | |
1390 { | |
1391 if (e->src->aux) | |
1392 { | |
1393 predicate this_bb_predicate | |
1394 = *(predicate *) e->src->aux; | |
1395 if (e->aux) | |
1396 this_bb_predicate &= (*(struct predicate *) e->aux); | |
1397 p = p.or_with (summary->conds, this_bb_predicate); | |
1398 if (p == true) | |
1399 break; | |
1400 } | |
1401 } | |
1402 if (p == false) | |
1403 gcc_checking_assert (!bb->aux); | |
1404 else | |
1405 { | |
1406 if (!bb->aux) | |
1407 { | |
1408 done = false; | |
1409 bb->aux = edge_predicate_pool.allocate (); | |
1410 *((predicate *) bb->aux) = p; | |
1411 } | |
1412 else if (p != *(predicate *) bb->aux) | |
1413 { | |
1414 /* This OR operation is needed to ensure monotonous data flow | |
1415 in the case we hit the limit on number of clauses and the | |
1416 and/or operations above give approximate answers. */ | |
1417 p = p.or_with (summary->conds, *(predicate *)bb->aux); | |
1418 if (p != *(predicate *) bb->aux) | |
1419 { | |
1420 done = false; | |
1421 *((predicate *) bb->aux) = p; | |
1422 } | |
1423 } | |
1424 } | |
1425 } | |
1426 } | |
1427 } | |
1428 | |
1429 | |
1430 /* Return predicate specifying when the STMT might have result that is not | |
1431 a compile time constant. */ | |
1432 | |
1433 static predicate | |
1434 will_be_nonconstant_expr_predicate (struct ipa_node_params *info, | |
1435 struct ipa_fn_summary *summary, | |
1436 tree expr, | |
1437 vec<predicate> nonconstant_names) | |
1438 { | |
1439 tree parm; | |
1440 int index; | |
1441 HOST_WIDE_INT size; | |
1442 | |
1443 while (UNARY_CLASS_P (expr)) | |
1444 expr = TREE_OPERAND (expr, 0); | |
1445 | |
1446 parm = unmodified_parm (NULL, expr, &size); | |
1447 if (parm && (index = ipa_get_param_decl_index (info, parm)) >= 0) | |
1448 return add_condition (summary, index, size, NULL, predicate::changed, | |
1449 NULL_TREE); | |
1450 if (is_gimple_min_invariant (expr)) | |
1451 return false; | |
1452 if (TREE_CODE (expr) == SSA_NAME) | |
1453 return nonconstant_names[SSA_NAME_VERSION (expr)]; | |
1454 if (BINARY_CLASS_P (expr) || COMPARISON_CLASS_P (expr)) | |
1455 { | |
1456 predicate p1 = will_be_nonconstant_expr_predicate | |
1457 (info, summary, TREE_OPERAND (expr, 0), | |
1458 nonconstant_names); | |
1459 if (p1 == true) | |
1460 return p1; | |
1461 | |
1462 predicate p2; | |
1463 p2 = will_be_nonconstant_expr_predicate (info, summary, | |
1464 TREE_OPERAND (expr, 1), | |
1465 nonconstant_names); | |
1466 return p1.or_with (summary->conds, p2); | |
1467 } | |
1468 else if (TREE_CODE (expr) == COND_EXPR) | |
1469 { | |
1470 predicate p1 = will_be_nonconstant_expr_predicate | |
1471 (info, summary, TREE_OPERAND (expr, 0), | |
1472 nonconstant_names); | |
1473 if (p1 == true) | |
1474 return p1; | |
1475 | |
1476 predicate p2; | |
1477 p2 = will_be_nonconstant_expr_predicate (info, summary, | |
1478 TREE_OPERAND (expr, 1), | |
1479 nonconstant_names); | |
1480 if (p2 == true) | |
1481 return p2; | |
1482 p1 = p1.or_with (summary->conds, p2); | |
1483 p2 = will_be_nonconstant_expr_predicate (info, summary, | |
1484 TREE_OPERAND (expr, 2), | |
1485 nonconstant_names); | |
1486 return p2.or_with (summary->conds, p1); | |
1487 } | |
1488 else | |
1489 { | |
1490 debug_tree (expr); | |
1491 gcc_unreachable (); | |
1492 } | |
1493 return false; | |
1494 } | |
1495 | |
1496 | |
1497 /* Return predicate specifying when the STMT might have result that is not | |
1498 a compile time constant. */ | |
1499 | |
1500 static predicate | |
1501 will_be_nonconstant_predicate (struct ipa_func_body_info *fbi, | |
1502 struct ipa_fn_summary *summary, | |
1503 gimple *stmt, | |
1504 vec<predicate> nonconstant_names) | |
1505 { | |
1506 predicate p = true; | |
1507 ssa_op_iter iter; | |
1508 tree use; | |
1509 predicate op_non_const; | |
1510 bool is_load; | |
1511 int base_index; | |
1512 HOST_WIDE_INT size; | |
1513 struct agg_position_info aggpos; | |
1514 | |
1515 /* What statments might be optimized away | |
1516 when their arguments are constant. */ | |
1517 if (gimple_code (stmt) != GIMPLE_ASSIGN | |
1518 && gimple_code (stmt) != GIMPLE_COND | |
1519 && gimple_code (stmt) != GIMPLE_SWITCH | |
1520 && (gimple_code (stmt) != GIMPLE_CALL | |
1521 || !(gimple_call_flags (stmt) & ECF_CONST))) | |
1522 return p; | |
1523 | |
1524 /* Stores will stay anyway. */ | |
1525 if (gimple_store_p (stmt)) | |
1526 return p; | |
1527 | |
1528 is_load = gimple_assign_load_p (stmt); | |
1529 | |
1530 /* Loads can be optimized when the value is known. */ | |
1531 if (is_load) | |
1532 { | |
1533 tree op; | |
1534 gcc_assert (gimple_assign_single_p (stmt)); | |
1535 op = gimple_assign_rhs1 (stmt); | |
1536 if (!unmodified_parm_or_parm_agg_item (fbi, stmt, op, &base_index, &size, | |
1537 &aggpos)) | |
1538 return p; | |
1539 } | |
1540 else | |
1541 base_index = -1; | |
1542 | |
1543 /* See if we understand all operands before we start | |
1544 adding conditionals. */ | |
1545 FOR_EACH_SSA_TREE_OPERAND (use, stmt, iter, SSA_OP_USE) | |
1546 { | |
1547 tree parm = unmodified_parm (stmt, use, NULL); | |
1548 /* For arguments we can build a condition. */ | |
1549 if (parm && ipa_get_param_decl_index (fbi->info, parm) >= 0) | |
1550 continue; | |
1551 if (TREE_CODE (use) != SSA_NAME) | |
1552 return p; | |
1553 /* If we know when operand is constant, | |
1554 we still can say something useful. */ | |
1555 if (nonconstant_names[SSA_NAME_VERSION (use)] != true) | |
1556 continue; | |
1557 return p; | |
1558 } | |
1559 | |
1560 if (is_load) | |
1561 op_non_const = | |
1562 add_condition (summary, base_index, size, &aggpos, predicate::changed, | |
1563 NULL); | |
1564 else | |
1565 op_non_const = false; | |
1566 FOR_EACH_SSA_TREE_OPERAND (use, stmt, iter, SSA_OP_USE) | |
1567 { | |
1568 HOST_WIDE_INT size; | |
1569 tree parm = unmodified_parm (stmt, use, &size); | |
1570 int index; | |
1571 | |
1572 if (parm && (index = ipa_get_param_decl_index (fbi->info, parm)) >= 0) | |
1573 { | |
1574 if (index != base_index) | |
1575 p = add_condition (summary, index, size, NULL, predicate::changed, | |
1576 NULL_TREE); | |
1577 else | |
1578 continue; | |
1579 } | |
1580 else | |
1581 p = nonconstant_names[SSA_NAME_VERSION (use)]; | |
1582 op_non_const = p.or_with (summary->conds, op_non_const); | |
1583 } | |
1584 if ((gimple_code (stmt) == GIMPLE_ASSIGN || gimple_code (stmt) == GIMPLE_CALL) | |
1585 && gimple_op (stmt, 0) | |
1586 && TREE_CODE (gimple_op (stmt, 0)) == SSA_NAME) | |
1587 nonconstant_names[SSA_NAME_VERSION (gimple_op (stmt, 0))] | |
1588 = op_non_const; | |
1589 return op_non_const; | |
1590 } | |
1591 | |
1592 struct record_modified_bb_info | |
1593 { | |
1594 bitmap bb_set; | |
1595 gimple *stmt; | |
1596 }; | |
1597 | |
1598 /* Value is initialized in INIT_BB and used in USE_BB. We want to copute | |
1599 probability how often it changes between USE_BB. | |
1600 INIT_BB->frequency/USE_BB->frequency is an estimate, but if INIT_BB | |
1601 is in different loop nest, we can do better. | |
1602 This is all just estimate. In theory we look for minimal cut separating | |
1603 INIT_BB and USE_BB, but we only want to anticipate loop invariant motion | |
1604 anyway. */ | |
1605 | |
1606 static basic_block | |
1607 get_minimal_bb (basic_block init_bb, basic_block use_bb) | |
1608 { | |
1609 struct loop *l = find_common_loop (init_bb->loop_father, use_bb->loop_father); | |
1610 if (l && l->header->frequency < init_bb->frequency) | |
1611 return l->header; | |
1612 return init_bb; | |
1613 } | |
1614 | |
1615 /* Callback of walk_aliased_vdefs. Records basic blocks where the value may be | |
1616 set except for info->stmt. */ | |
1617 | |
1618 static bool | |
1619 record_modified (ao_ref *ao ATTRIBUTE_UNUSED, tree vdef, void *data) | |
1620 { | |
1621 struct record_modified_bb_info *info = | |
1622 (struct record_modified_bb_info *) data; | |
1623 if (SSA_NAME_DEF_STMT (vdef) == info->stmt) | |
1624 return false; | |
1625 bitmap_set_bit (info->bb_set, | |
1626 SSA_NAME_IS_DEFAULT_DEF (vdef) | |
1627 ? ENTRY_BLOCK_PTR_FOR_FN (cfun)->index | |
1628 : get_minimal_bb | |
1629 (gimple_bb (SSA_NAME_DEF_STMT (vdef)), | |
1630 gimple_bb (info->stmt))->index); | |
1631 return false; | |
1632 } | |
1633 | |
1634 /* Return probability (based on REG_BR_PROB_BASE) that I-th parameter of STMT | |
1635 will change since last invocation of STMT. | |
1636 | |
1637 Value 0 is reserved for compile time invariants. | |
1638 For common parameters it is REG_BR_PROB_BASE. For loop invariants it | |
1639 ought to be REG_BR_PROB_BASE / estimated_iters. */ | |
1640 | |
1641 static int | |
1642 param_change_prob (gimple *stmt, int i) | |
1643 { | |
1644 tree op = gimple_call_arg (stmt, i); | |
1645 basic_block bb = gimple_bb (stmt); | |
1646 | |
1647 if (TREE_CODE (op) == WITH_SIZE_EXPR) | |
1648 op = TREE_OPERAND (op, 0); | |
1649 | |
1650 tree base = get_base_address (op); | |
1651 | |
1652 /* Global invariants never change. */ | |
1653 if (is_gimple_min_invariant (base)) | |
1654 return 0; | |
1655 | |
1656 /* We would have to do non-trivial analysis to really work out what | |
1657 is the probability of value to change (i.e. when init statement | |
1658 is in a sibling loop of the call). | |
1659 | |
1660 We do an conservative estimate: when call is executed N times more often | |
1661 than the statement defining value, we take the frequency 1/N. */ | |
1662 if (TREE_CODE (base) == SSA_NAME) | |
1663 { | |
1664 int init_freq; | |
1665 | |
1666 if (!bb->frequency) | |
1667 return REG_BR_PROB_BASE; | |
1668 | |
1669 if (SSA_NAME_IS_DEFAULT_DEF (base)) | |
1670 init_freq = ENTRY_BLOCK_PTR_FOR_FN (cfun)->frequency; | |
1671 else | |
1672 init_freq = get_minimal_bb | |
1673 (gimple_bb (SSA_NAME_DEF_STMT (base)), | |
1674 gimple_bb (stmt))->frequency; | |
1675 | |
1676 if (!init_freq) | |
1677 init_freq = 1; | |
1678 if (init_freq < bb->frequency) | |
1679 return MAX (GCOV_COMPUTE_SCALE (init_freq, bb->frequency), 1); | |
1680 else | |
1681 return REG_BR_PROB_BASE; | |
1682 } | |
1683 else | |
1684 { | |
1685 ao_ref refd; | |
1686 int max; | |
1687 struct record_modified_bb_info info; | |
1688 bitmap_iterator bi; | |
1689 unsigned index; | |
1690 tree init = ctor_for_folding (base); | |
1691 | |
1692 if (init != error_mark_node) | |
1693 return 0; | |
1694 if (!bb->frequency) | |
1695 return REG_BR_PROB_BASE; | |
1696 ao_ref_init (&refd, op); | |
1697 info.stmt = stmt; | |
1698 info.bb_set = BITMAP_ALLOC (NULL); | |
1699 walk_aliased_vdefs (&refd, gimple_vuse (stmt), record_modified, &info, | |
1700 NULL); | |
1701 if (bitmap_bit_p (info.bb_set, bb->index)) | |
1702 { | |
1703 BITMAP_FREE (info.bb_set); | |
1704 return REG_BR_PROB_BASE; | |
1705 } | |
1706 | |
1707 /* Assume that every memory is initialized at entry. | |
1708 TODO: Can we easilly determine if value is always defined | |
1709 and thus we may skip entry block? */ | |
1710 if (ENTRY_BLOCK_PTR_FOR_FN (cfun)->frequency) | |
1711 max = ENTRY_BLOCK_PTR_FOR_FN (cfun)->frequency; | |
1712 else | |
1713 max = 1; | |
1714 | |
1715 EXECUTE_IF_SET_IN_BITMAP (info.bb_set, 0, index, bi) | |
1716 max = MIN (max, BASIC_BLOCK_FOR_FN (cfun, index)->frequency); | |
1717 | |
1718 BITMAP_FREE (info.bb_set); | |
1719 if (max < bb->frequency) | |
1720 return MAX (GCOV_COMPUTE_SCALE (max, bb->frequency), 1); | |
1721 else | |
1722 return REG_BR_PROB_BASE; | |
1723 } | |
1724 } | |
1725 | |
1726 /* Find whether a basic block BB is the final block of a (half) diamond CFG | |
1727 sub-graph and if the predicate the condition depends on is known. If so, | |
1728 return true and store the pointer the predicate in *P. */ | |
1729 | |
1730 static bool | |
1731 phi_result_unknown_predicate (struct ipa_node_params *info, | |
1732 ipa_fn_summary *summary, basic_block bb, | |
1733 predicate *p, | |
1734 vec<predicate> nonconstant_names) | |
1735 { | |
1736 edge e; | |
1737 edge_iterator ei; | |
1738 basic_block first_bb = NULL; | |
1739 gimple *stmt; | |
1740 | |
1741 if (single_pred_p (bb)) | |
1742 { | |
1743 *p = false; | |
1744 return true; | |
1745 } | |
1746 | |
1747 FOR_EACH_EDGE (e, ei, bb->preds) | |
1748 { | |
1749 if (single_succ_p (e->src)) | |
1750 { | |
1751 if (!single_pred_p (e->src)) | |
1752 return false; | |
1753 if (!first_bb) | |
1754 first_bb = single_pred (e->src); | |
1755 else if (single_pred (e->src) != first_bb) | |
1756 return false; | |
1757 } | |
1758 else | |
1759 { | |
1760 if (!first_bb) | |
1761 first_bb = e->src; | |
1762 else if (e->src != first_bb) | |
1763 return false; | |
1764 } | |
1765 } | |
1766 | |
1767 if (!first_bb) | |
1768 return false; | |
1769 | |
1770 stmt = last_stmt (first_bb); | |
1771 if (!stmt | |
1772 || gimple_code (stmt) != GIMPLE_COND | |
1773 || !is_gimple_ip_invariant (gimple_cond_rhs (stmt))) | |
1774 return false; | |
1775 | |
1776 *p = will_be_nonconstant_expr_predicate (info, summary, | |
1777 gimple_cond_lhs (stmt), | |
1778 nonconstant_names); | |
1779 if (*p == true) | |
1780 return false; | |
1781 else | |
1782 return true; | |
1783 } | |
1784 | |
1785 /* Given a PHI statement in a function described by inline properties SUMMARY | |
1786 and *P being the predicate describing whether the selected PHI argument is | |
1787 known, store a predicate for the result of the PHI statement into | |
1788 NONCONSTANT_NAMES, if possible. */ | |
1789 | |
1790 static void | |
1791 predicate_for_phi_result (struct ipa_fn_summary *summary, gphi *phi, | |
1792 predicate *p, | |
1793 vec<predicate> nonconstant_names) | |
1794 { | |
1795 unsigned i; | |
1796 | |
1797 for (i = 0; i < gimple_phi_num_args (phi); i++) | |
1798 { | |
1799 tree arg = gimple_phi_arg (phi, i)->def; | |
1800 if (!is_gimple_min_invariant (arg)) | |
1801 { | |
1802 gcc_assert (TREE_CODE (arg) == SSA_NAME); | |
1803 *p = p->or_with (summary->conds, | |
1804 nonconstant_names[SSA_NAME_VERSION (arg)]); | |
1805 if (*p == true) | |
1806 return; | |
1807 } | |
1808 } | |
1809 | |
1810 if (dump_file && (dump_flags & TDF_DETAILS)) | |
1811 { | |
1812 fprintf (dump_file, "\t\tphi predicate: "); | |
1813 p->dump (dump_file, summary->conds); | |
1814 } | |
1815 nonconstant_names[SSA_NAME_VERSION (gimple_phi_result (phi))] = *p; | |
1816 } | |
1817 | |
1818 /* Return predicate specifying when array index in access OP becomes non-constant. */ | |
1819 | |
1820 static predicate | |
1821 array_index_predicate (ipa_fn_summary *info, | |
1822 vec< predicate> nonconstant_names, tree op) | |
1823 { | |
1824 predicate p = false; | |
1825 while (handled_component_p (op)) | |
1826 { | |
1827 if (TREE_CODE (op) == ARRAY_REF || TREE_CODE (op) == ARRAY_RANGE_REF) | |
1828 { | |
1829 if (TREE_CODE (TREE_OPERAND (op, 1)) == SSA_NAME) | |
1830 p = p.or_with (info->conds, | |
1831 nonconstant_names[SSA_NAME_VERSION | |
1832 (TREE_OPERAND (op, 1))]); | |
1833 } | |
1834 op = TREE_OPERAND (op, 0); | |
1835 } | |
1836 return p; | |
1837 } | |
1838 | |
1839 /* For a typical usage of __builtin_expect (a<b, 1), we | |
1840 may introduce an extra relation stmt: | |
1841 With the builtin, we have | |
1842 t1 = a <= b; | |
1843 t2 = (long int) t1; | |
1844 t3 = __builtin_expect (t2, 1); | |
1845 if (t3 != 0) | |
1846 goto ... | |
1847 Without the builtin, we have | |
1848 if (a<=b) | |
1849 goto... | |
1850 This affects the size/time estimation and may have | |
1851 an impact on the earlier inlining. | |
1852 Here find this pattern and fix it up later. */ | |
1853 | |
1854 static gimple * | |
1855 find_foldable_builtin_expect (basic_block bb) | |
1856 { | |
1857 gimple_stmt_iterator bsi; | |
1858 | |
1859 for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi)) | |
1860 { | |
1861 gimple *stmt = gsi_stmt (bsi); | |
1862 if (gimple_call_builtin_p (stmt, BUILT_IN_EXPECT) | |
1863 || gimple_call_internal_p (stmt, IFN_BUILTIN_EXPECT)) | |
1864 { | |
1865 tree var = gimple_call_lhs (stmt); | |
1866 tree arg = gimple_call_arg (stmt, 0); | |
1867 use_operand_p use_p; | |
1868 gimple *use_stmt; | |
1869 bool match = false; | |
1870 bool done = false; | |
1871 | |
1872 if (!var || !arg) | |
1873 continue; | |
1874 gcc_assert (TREE_CODE (var) == SSA_NAME); | |
1875 | |
1876 while (TREE_CODE (arg) == SSA_NAME) | |
1877 { | |
1878 gimple *stmt_tmp = SSA_NAME_DEF_STMT (arg); | |
1879 if (!is_gimple_assign (stmt_tmp)) | |
1880 break; | |
1881 switch (gimple_assign_rhs_code (stmt_tmp)) | |
1882 { | |
1883 case LT_EXPR: | |
1884 case LE_EXPR: | |
1885 case GT_EXPR: | |
1886 case GE_EXPR: | |
1887 case EQ_EXPR: | |
1888 case NE_EXPR: | |
1889 match = true; | |
1890 done = true; | |
1891 break; | |
1892 CASE_CONVERT: | |
1893 break; | |
1894 default: | |
1895 done = true; | |
1896 break; | |
1897 } | |
1898 if (done) | |
1899 break; | |
1900 arg = gimple_assign_rhs1 (stmt_tmp); | |
1901 } | |
1902 | |
1903 if (match && single_imm_use (var, &use_p, &use_stmt) | |
1904 && gimple_code (use_stmt) == GIMPLE_COND) | |
1905 return use_stmt; | |
1906 } | |
1907 } | |
1908 return NULL; | |
1909 } | |
1910 | |
1911 /* Return true when the basic blocks contains only clobbers followed by RESX. | |
1912 Such BBs are kept around to make removal of dead stores possible with | |
1913 presence of EH and will be optimized out by optimize_clobbers later in the | |
1914 game. | |
1915 | |
1916 NEED_EH is used to recurse in case the clobber has non-EH predecestors | |
1917 that can be clobber only, too.. When it is false, the RESX is not necessary | |
1918 on the end of basic block. */ | |
1919 | |
1920 static bool | |
1921 clobber_only_eh_bb_p (basic_block bb, bool need_eh = true) | |
1922 { | |
1923 gimple_stmt_iterator gsi = gsi_last_bb (bb); | |
1924 edge_iterator ei; | |
1925 edge e; | |
1926 | |
1927 if (need_eh) | |
1928 { | |
1929 if (gsi_end_p (gsi)) | |
1930 return false; | |
1931 if (gimple_code (gsi_stmt (gsi)) != GIMPLE_RESX) | |
1932 return false; | |
1933 gsi_prev (&gsi); | |
1934 } | |
1935 else if (!single_succ_p (bb)) | |
1936 return false; | |
1937 | |
1938 for (; !gsi_end_p (gsi); gsi_prev (&gsi)) | |
1939 { | |
1940 gimple *stmt = gsi_stmt (gsi); | |
1941 if (is_gimple_debug (stmt)) | |
1942 continue; | |
1943 if (gimple_clobber_p (stmt)) | |
1944 continue; | |
1945 if (gimple_code (stmt) == GIMPLE_LABEL) | |
1946 break; | |
1947 return false; | |
1948 } | |
1949 | |
1950 /* See if all predecestors are either throws or clobber only BBs. */ | |
1951 FOR_EACH_EDGE (e, ei, bb->preds) | |
1952 if (!(e->flags & EDGE_EH) | |
1953 && !clobber_only_eh_bb_p (e->src, false)) | |
1954 return false; | |
1955 | |
1956 return true; | |
1957 } | |
1958 | |
1959 /* Return true if STMT compute a floating point expression that may be affected | |
1960 by -ffast-math and similar flags. */ | |
1961 | |
1962 static bool | |
1963 fp_expression_p (gimple *stmt) | |
1964 { | |
1965 ssa_op_iter i; | |
1966 tree op; | |
1967 | |
1968 FOR_EACH_SSA_TREE_OPERAND (op, stmt, i, SSA_OP_DEF|SSA_OP_USE) | |
1969 if (FLOAT_TYPE_P (TREE_TYPE (op))) | |
1970 return true; | |
1971 return false; | |
1972 } | |
1973 | |
1974 /* Analyze function body for NODE. | |
1975 EARLY indicates run from early optimization pipeline. */ | |
1976 | |
1977 static void | |
1978 analyze_function_body (struct cgraph_node *node, bool early) | |
1979 { | |
1980 sreal time = 0; | |
1981 /* Estimate static overhead for function prologue/epilogue and alignment. */ | |
1982 int size = 2; | |
1983 /* Benefits are scaled by probability of elimination that is in range | |
1984 <0,2>. */ | |
1985 basic_block bb; | |
1986 struct function *my_function = DECL_STRUCT_FUNCTION (node->decl); | |
1987 int freq; | |
1988 struct ipa_fn_summary *info = ipa_fn_summaries->get (node); | |
1989 predicate bb_predicate; | |
1990 struct ipa_func_body_info fbi; | |
1991 vec<predicate> nonconstant_names = vNULL; | |
1992 int nblocks, n; | |
1993 int *order; | |
1994 predicate array_index = true; | |
1995 gimple *fix_builtin_expect_stmt; | |
1996 | |
1997 gcc_assert (my_function && my_function->cfg); | |
1998 gcc_assert (cfun == my_function); | |
1999 | |
2000 memset(&fbi, 0, sizeof(fbi)); | |
2001 info->conds = NULL; | |
2002 info->size_time_table = NULL; | |
2003 | |
2004 /* When optimizing and analyzing for IPA inliner, initialize loop optimizer | |
2005 so we can produce proper inline hints. | |
2006 | |
2007 When optimizing and analyzing for early inliner, initialize node params | |
2008 so we can produce correct BB predicates. */ | |
2009 | |
2010 if (opt_for_fn (node->decl, optimize)) | |
2011 { | |
2012 calculate_dominance_info (CDI_DOMINATORS); | |
2013 if (!early) | |
2014 loop_optimizer_init (LOOPS_NORMAL | LOOPS_HAVE_RECORDED_EXITS); | |
2015 else | |
2016 { | |
2017 ipa_check_create_node_params (); | |
2018 ipa_initialize_node_params (node); | |
2019 } | |
2020 | |
2021 if (ipa_node_params_sum) | |
2022 { | |
2023 fbi.node = node; | |
2024 fbi.info = IPA_NODE_REF (node); | |
2025 fbi.bb_infos = vNULL; | |
2026 fbi.bb_infos.safe_grow_cleared (last_basic_block_for_fn (cfun)); | |
2027 fbi.param_count = count_formal_params(node->decl); | |
2028 nonconstant_names.safe_grow_cleared | |
2029 (SSANAMES (my_function)->length ()); | |
2030 } | |
2031 } | |
2032 | |
2033 if (dump_file) | |
2034 fprintf (dump_file, "\nAnalyzing function body size: %s\n", | |
2035 node->name ()); | |
2036 | |
2037 /* When we run into maximal number of entries, we assign everything to the | |
2038 constant truth case. Be sure to have it in list. */ | |
2039 bb_predicate = true; | |
2040 info->account_size_time (0, 0, bb_predicate, bb_predicate); | |
2041 | |
2042 bb_predicate = predicate::not_inlined (); | |
2043 info->account_size_time (2 * ipa_fn_summary::size_scale, 0, bb_predicate, | |
2044 bb_predicate); | |
2045 | |
2046 if (fbi.info) | |
2047 compute_bb_predicates (&fbi, node, info); | |
2048 order = XNEWVEC (int, n_basic_blocks_for_fn (cfun)); | |
2049 nblocks = pre_and_rev_post_order_compute (NULL, order, false); | |
2050 for (n = 0; n < nblocks; n++) | |
2051 { | |
2052 bb = BASIC_BLOCK_FOR_FN (cfun, order[n]); | |
2053 freq = compute_call_stmt_bb_frequency (node->decl, bb); | |
2054 if (clobber_only_eh_bb_p (bb)) | |
2055 { | |
2056 if (dump_file && (dump_flags & TDF_DETAILS)) | |
2057 fprintf (dump_file, "\n Ignoring BB %i;" | |
2058 " it will be optimized away by cleanup_clobbers\n", | |
2059 bb->index); | |
2060 continue; | |
2061 } | |
2062 | |
2063 /* TODO: Obviously predicates can be propagated down across CFG. */ | |
2064 if (fbi.info) | |
2065 { | |
2066 if (bb->aux) | |
2067 bb_predicate = *(predicate *) bb->aux; | |
2068 else | |
2069 bb_predicate = false; | |
2070 } | |
2071 else | |
2072 bb_predicate = true; | |
2073 | |
2074 if (dump_file && (dump_flags & TDF_DETAILS)) | |
2075 { | |
2076 fprintf (dump_file, "\n BB %i predicate:", bb->index); | |
2077 bb_predicate.dump (dump_file, info->conds); | |
2078 } | |
2079 | |
2080 if (fbi.info && nonconstant_names.exists ()) | |
2081 { | |
2082 predicate phi_predicate; | |
2083 bool first_phi = true; | |
2084 | |
2085 for (gphi_iterator bsi = gsi_start_phis (bb); !gsi_end_p (bsi); | |
2086 gsi_next (&bsi)) | |
2087 { | |
2088 if (first_phi | |
2089 && !phi_result_unknown_predicate (fbi.info, info, bb, | |
2090 &phi_predicate, | |
2091 nonconstant_names)) | |
2092 break; | |
2093 first_phi = false; | |
2094 if (dump_file && (dump_flags & TDF_DETAILS)) | |
2095 { | |
2096 fprintf (dump_file, " "); | |
2097 print_gimple_stmt (dump_file, gsi_stmt (bsi), 0); | |
2098 } | |
2099 predicate_for_phi_result (info, bsi.phi (), &phi_predicate, | |
2100 nonconstant_names); | |
2101 } | |
2102 } | |
2103 | |
2104 fix_builtin_expect_stmt = find_foldable_builtin_expect (bb); | |
2105 | |
2106 for (gimple_stmt_iterator bsi = gsi_start_bb (bb); !gsi_end_p (bsi); | |
2107 gsi_next (&bsi)) | |
2108 { | |
2109 gimple *stmt = gsi_stmt (bsi); | |
2110 int this_size = estimate_num_insns (stmt, &eni_size_weights); | |
2111 int this_time = estimate_num_insns (stmt, &eni_time_weights); | |
2112 int prob; | |
2113 predicate will_be_nonconstant; | |
2114 | |
2115 /* This relation stmt should be folded after we remove | |
2116 buildin_expect call. Adjust the cost here. */ | |
2117 if (stmt == fix_builtin_expect_stmt) | |
2118 { | |
2119 this_size--; | |
2120 this_time--; | |
2121 } | |
2122 | |
2123 if (dump_file && (dump_flags & TDF_DETAILS)) | |
2124 { | |
2125 fprintf (dump_file, " "); | |
2126 print_gimple_stmt (dump_file, stmt, 0); | |
2127 fprintf (dump_file, "\t\tfreq:%3.2f size:%3i time:%3i\n", | |
2128 ((double) freq) / CGRAPH_FREQ_BASE, this_size, | |
2129 this_time); | |
2130 } | |
2131 | |
2132 if (gimple_assign_load_p (stmt) && nonconstant_names.exists ()) | |
2133 { | |
2134 predicate this_array_index; | |
2135 this_array_index = | |
2136 array_index_predicate (info, nonconstant_names, | |
2137 gimple_assign_rhs1 (stmt)); | |
2138 if (this_array_index != false) | |
2139 array_index &= this_array_index; | |
2140 } | |
2141 if (gimple_store_p (stmt) && nonconstant_names.exists ()) | |
2142 { | |
2143 predicate this_array_index; | |
2144 this_array_index = | |
2145 array_index_predicate (info, nonconstant_names, | |
2146 gimple_get_lhs (stmt)); | |
2147 if (this_array_index != false) | |
2148 array_index &= this_array_index; | |
2149 } | |
2150 | |
2151 | |
2152 if (is_gimple_call (stmt) | |
2153 && !gimple_call_internal_p (stmt)) | |
2154 { | |
2155 struct cgraph_edge *edge = node->get_edge (stmt); | |
2156 struct ipa_call_summary *es = ipa_call_summaries->get (edge); | |
2157 | |
2158 /* Special case: results of BUILT_IN_CONSTANT_P will be always | |
2159 resolved as constant. We however don't want to optimize | |
2160 out the cgraph edges. */ | |
2161 if (nonconstant_names.exists () | |
2162 && gimple_call_builtin_p (stmt, BUILT_IN_CONSTANT_P) | |
2163 && gimple_call_lhs (stmt) | |
2164 && TREE_CODE (gimple_call_lhs (stmt)) == SSA_NAME) | |
2165 { | |
2166 predicate false_p = false; | |
2167 nonconstant_names[SSA_NAME_VERSION (gimple_call_lhs (stmt))] | |
2168 = false_p; | |
2169 } | |
2170 if (ipa_node_params_sum) | |
2171 { | |
2172 int count = gimple_call_num_args (stmt); | |
2173 int i; | |
2174 | |
2175 if (count) | |
2176 es->param.safe_grow_cleared (count); | |
2177 for (i = 0; i < count; i++) | |
2178 { | |
2179 int prob = param_change_prob (stmt, i); | |
2180 gcc_assert (prob >= 0 && prob <= REG_BR_PROB_BASE); | |
2181 es->param[i].change_prob = prob; | |
2182 } | |
2183 } | |
2184 | |
2185 es->call_stmt_size = this_size; | |
2186 es->call_stmt_time = this_time; | |
2187 es->loop_depth = bb_loop_depth (bb); | |
2188 edge_set_predicate (edge, &bb_predicate); | |
2189 } | |
2190 | |
2191 /* TODO: When conditional jump or swithc is known to be constant, but | |
2192 we did not translate it into the predicates, we really can account | |
2193 just maximum of the possible paths. */ | |
2194 if (fbi.info) | |
2195 will_be_nonconstant | |
2196 = will_be_nonconstant_predicate (&fbi, info, | |
2197 stmt, nonconstant_names); | |
2198 else | |
2199 will_be_nonconstant = true; | |
2200 if (this_time || this_size) | |
2201 { | |
2202 this_time *= freq; | |
2203 | |
2204 prob = eliminated_by_inlining_prob (stmt); | |
2205 if (prob == 1 && dump_file && (dump_flags & TDF_DETAILS)) | |
2206 fprintf (dump_file, | |
2207 "\t\t50%% will be eliminated by inlining\n"); | |
2208 if (prob == 2 && dump_file && (dump_flags & TDF_DETAILS)) | |
2209 fprintf (dump_file, "\t\tWill be eliminated by inlining\n"); | |
2210 | |
2211 struct predicate p = bb_predicate & will_be_nonconstant; | |
2212 | |
2213 /* We can ignore statement when we proved it is never going | |
2214 to happen, but we can not do that for call statements | |
2215 because edges are accounted specially. */ | |
2216 | |
2217 if (*(is_gimple_call (stmt) ? &bb_predicate : &p) != false) | |
2218 { | |
2219 time += this_time; | |
2220 size += this_size; | |
2221 } | |
2222 | |
2223 /* We account everything but the calls. Calls have their own | |
2224 size/time info attached to cgraph edges. This is necessary | |
2225 in order to make the cost disappear after inlining. */ | |
2226 if (!is_gimple_call (stmt)) | |
2227 { | |
2228 if (prob) | |
2229 { | |
2230 predicate ip = bb_predicate & predicate::not_inlined (); | |
2231 info->account_size_time (this_size * prob, | |
2232 (sreal)(this_time * prob) | |
2233 / (CGRAPH_FREQ_BASE * 2), ip, | |
2234 p); | |
2235 } | |
2236 if (prob != 2) | |
2237 info->account_size_time (this_size * (2 - prob), | |
2238 (sreal)(this_time * (2 - prob)) | |
2239 / (CGRAPH_FREQ_BASE * 2), | |
2240 bb_predicate, | |
2241 p); | |
2242 } | |
2243 | |
2244 if (!info->fp_expressions && fp_expression_p (stmt)) | |
2245 { | |
2246 info->fp_expressions = true; | |
2247 if (dump_file) | |
2248 fprintf (dump_file, " fp_expression set\n"); | |
2249 } | |
2250 | |
2251 gcc_assert (time >= 0); | |
2252 gcc_assert (size >= 0); | |
2253 } | |
2254 } | |
2255 } | |
2256 set_hint_predicate (&ipa_fn_summaries->get (node)->array_index, array_index); | |
2257 time = time / CGRAPH_FREQ_BASE; | |
2258 free (order); | |
2259 | |
2260 if (nonconstant_names.exists () && !early) | |
2261 { | |
2262 struct loop *loop; | |
2263 predicate loop_iterations = true; | |
2264 predicate loop_stride = true; | |
2265 | |
2266 if (dump_file && (dump_flags & TDF_DETAILS)) | |
2267 flow_loops_dump (dump_file, NULL, 0); | |
2268 scev_initialize (); | |
2269 FOR_EACH_LOOP (loop, 0) | |
2270 { | |
2271 vec<edge> exits; | |
2272 edge ex; | |
2273 unsigned int j; | |
2274 struct tree_niter_desc niter_desc; | |
2275 bb_predicate = *(predicate *) loop->header->aux; | |
2276 | |
2277 exits = get_loop_exit_edges (loop); | |
2278 FOR_EACH_VEC_ELT (exits, j, ex) | |
2279 if (number_of_iterations_exit (loop, ex, &niter_desc, false) | |
2280 && !is_gimple_min_invariant (niter_desc.niter)) | |
2281 { | |
2282 predicate will_be_nonconstant | |
2283 = will_be_nonconstant_expr_predicate (fbi.info, info, | |
2284 niter_desc.niter, | |
2285 nonconstant_names); | |
2286 if (will_be_nonconstant != true) | |
2287 will_be_nonconstant = bb_predicate & will_be_nonconstant; | |
2288 if (will_be_nonconstant != true | |
2289 && will_be_nonconstant != false) | |
2290 /* This is slightly inprecise. We may want to represent each | |
2291 loop with independent predicate. */ | |
2292 loop_iterations &= will_be_nonconstant; | |
2293 } | |
2294 exits.release (); | |
2295 } | |
2296 | |
2297 /* To avoid quadratic behavior we analyze stride predicates only | |
2298 with respect to the containing loop. Thus we simply iterate | |
2299 over all defs in the outermost loop body. */ | |
2300 for (loop = loops_for_fn (cfun)->tree_root->inner; | |
2301 loop != NULL; loop = loop->next) | |
2302 { | |
2303 basic_block *body = get_loop_body (loop); | |
2304 for (unsigned i = 0; i < loop->num_nodes; i++) | |
2305 { | |
2306 gimple_stmt_iterator gsi; | |
2307 bb_predicate = *(predicate *) body[i]->aux; | |
2308 for (gsi = gsi_start_bb (body[i]); !gsi_end_p (gsi); | |
2309 gsi_next (&gsi)) | |
2310 { | |
2311 gimple *stmt = gsi_stmt (gsi); | |
2312 | |
2313 if (!is_gimple_assign (stmt)) | |
2314 continue; | |
2315 | |
2316 tree def = gimple_assign_lhs (stmt); | |
2317 if (TREE_CODE (def) != SSA_NAME) | |
2318 continue; | |
2319 | |
2320 affine_iv iv; | |
2321 if (!simple_iv (loop_containing_stmt (stmt), | |
2322 loop_containing_stmt (stmt), | |
2323 def, &iv, true) | |
2324 || is_gimple_min_invariant (iv.step)) | |
2325 continue; | |
2326 | |
2327 predicate will_be_nonconstant | |
2328 = will_be_nonconstant_expr_predicate (fbi.info, info, | |
2329 iv.step, | |
2330 nonconstant_names); | |
2331 if (will_be_nonconstant != true) | |
2332 will_be_nonconstant = bb_predicate & will_be_nonconstant; | |
2333 if (will_be_nonconstant != true | |
2334 && will_be_nonconstant != false) | |
2335 /* This is slightly inprecise. We may want to represent | |
2336 each loop with independent predicate. */ | |
2337 loop_stride = loop_stride & will_be_nonconstant; | |
2338 } | |
2339 } | |
2340 free (body); | |
2341 } | |
2342 set_hint_predicate (&ipa_fn_summaries->get (node)->loop_iterations, | |
2343 loop_iterations); | |
2344 set_hint_predicate (&ipa_fn_summaries->get (node)->loop_stride, | |
2345 loop_stride); | |
2346 scev_finalize (); | |
2347 } | |
2348 FOR_ALL_BB_FN (bb, my_function) | |
2349 { | |
2350 edge e; | |
2351 edge_iterator ei; | |
2352 | |
2353 if (bb->aux) | |
2354 edge_predicate_pool.remove ((predicate *)bb->aux); | |
2355 bb->aux = NULL; | |
2356 FOR_EACH_EDGE (e, ei, bb->succs) | |
2357 { | |
2358 if (e->aux) | |
2359 edge_predicate_pool.remove ((predicate *) e->aux); | |
2360 e->aux = NULL; | |
2361 } | |
2362 } | |
2363 ipa_fn_summaries->get (node)->time = time; | |
2364 ipa_fn_summaries->get (node)->self_size = size; | |
2365 nonconstant_names.release (); | |
2366 ipa_release_body_info (&fbi); | |
2367 if (opt_for_fn (node->decl, optimize)) | |
2368 { | |
2369 if (!early) | |
2370 loop_optimizer_finalize (); | |
2371 else if (!ipa_edge_args_sum) | |
2372 ipa_free_all_node_params (); | |
2373 free_dominance_info (CDI_DOMINATORS); | |
2374 } | |
2375 if (dump_file) | |
2376 { | |
2377 fprintf (dump_file, "\n"); | |
2378 ipa_dump_fn_summary (dump_file, node); | |
2379 } | |
2380 } | |
2381 | |
2382 | |
2383 /* Compute function summary. | |
2384 EARLY is true when we compute parameters during early opts. */ | |
2385 | |
2386 void | |
2387 compute_fn_summary (struct cgraph_node *node, bool early) | |
2388 { | |
2389 HOST_WIDE_INT self_stack_size; | |
2390 struct cgraph_edge *e; | |
2391 struct ipa_fn_summary *info; | |
2392 | |
2393 gcc_assert (!node->global.inlined_to); | |
2394 | |
2395 if (!ipa_fn_summaries) | |
2396 ipa_fn_summary_alloc (); | |
2397 | |
2398 info = ipa_fn_summaries->get (node); | |
2399 info->reset (node); | |
2400 | |
2401 /* Estimate the stack size for the function if we're optimizing. */ | |
2402 self_stack_size = optimize && !node->thunk.thunk_p | |
2403 ? estimated_stack_frame_size (node) : 0; | |
2404 info->estimated_self_stack_size = self_stack_size; | |
2405 info->estimated_stack_size = self_stack_size; | |
2406 info->stack_frame_offset = 0; | |
2407 | |
2408 if (node->thunk.thunk_p) | |
2409 { | |
2410 struct ipa_call_summary *es = ipa_call_summaries->get (node->callees); | |
2411 predicate t = true; | |
2412 | |
2413 node->local.can_change_signature = false; | |
2414 es->call_stmt_size = eni_size_weights.call_cost; | |
2415 es->call_stmt_time = eni_time_weights.call_cost; | |
2416 info->account_size_time (ipa_fn_summary::size_scale * 2, 2, t, t); | |
2417 t = predicate::not_inlined (); | |
2418 info->account_size_time (2 * ipa_fn_summary::size_scale, 0, t, t); | |
2419 ipa_update_overall_fn_summary (node); | |
2420 info->self_size = info->size; | |
2421 /* We can not inline instrumentation clones. */ | |
2422 if (node->thunk.add_pointer_bounds_args) | |
2423 { | |
2424 info->inlinable = false; | |
2425 node->callees->inline_failed = CIF_CHKP; | |
2426 } | |
2427 else | |
2428 info->inlinable = true; | |
2429 } | |
2430 else | |
2431 { | |
2432 /* Even is_gimple_min_invariant rely on current_function_decl. */ | |
2433 push_cfun (DECL_STRUCT_FUNCTION (node->decl)); | |
2434 | |
2435 /* Can this function be inlined at all? */ | |
2436 if (!opt_for_fn (node->decl, optimize) | |
2437 && !lookup_attribute ("always_inline", | |
2438 DECL_ATTRIBUTES (node->decl))) | |
2439 info->inlinable = false; | |
2440 else | |
2441 info->inlinable = tree_inlinable_function_p (node->decl); | |
2442 | |
2443 info->contains_cilk_spawn = fn_contains_cilk_spawn_p (cfun); | |
2444 | |
2445 /* Type attributes can use parameter indices to describe them. */ | |
2446 if (TYPE_ATTRIBUTES (TREE_TYPE (node->decl))) | |
2447 node->local.can_change_signature = false; | |
2448 else | |
2449 { | |
2450 /* Otherwise, inlinable functions always can change signature. */ | |
2451 if (info->inlinable) | |
2452 node->local.can_change_signature = true; | |
2453 else | |
2454 { | |
2455 /* Functions calling builtin_apply can not change signature. */ | |
2456 for (e = node->callees; e; e = e->next_callee) | |
2457 { | |
2458 tree cdecl = e->callee->decl; | |
2459 if (DECL_BUILT_IN (cdecl) | |
2460 && DECL_BUILT_IN_CLASS (cdecl) == BUILT_IN_NORMAL | |
2461 && (DECL_FUNCTION_CODE (cdecl) == BUILT_IN_APPLY_ARGS | |
2462 || DECL_FUNCTION_CODE (cdecl) == BUILT_IN_VA_START)) | |
2463 break; | |
2464 } | |
2465 node->local.can_change_signature = !e; | |
2466 } | |
2467 } | |
2468 /* Functions called by instrumentation thunk can't change signature | |
2469 because instrumentation thunk modification is not supported. */ | |
2470 if (node->local.can_change_signature) | |
2471 for (e = node->callers; e; e = e->next_caller) | |
2472 if (e->caller->thunk.thunk_p | |
2473 && e->caller->thunk.add_pointer_bounds_args) | |
2474 { | |
2475 node->local.can_change_signature = false; | |
2476 break; | |
2477 } | |
2478 analyze_function_body (node, early); | |
2479 pop_cfun (); | |
2480 } | |
2481 for (e = node->callees; e; e = e->next_callee) | |
2482 if (e->callee->comdat_local_p ()) | |
2483 break; | |
2484 node->calls_comdat_local = (e != NULL); | |
2485 | |
2486 /* Inlining characteristics are maintained by the cgraph_mark_inline. */ | |
2487 info->size = info->self_size; | |
2488 info->stack_frame_offset = 0; | |
2489 info->estimated_stack_size = info->estimated_self_stack_size; | |
2490 | |
2491 /* Code above should compute exactly the same result as | |
2492 ipa_update_overall_fn_summary but because computation happens in | |
2493 different order the roundoff errors result in slight changes. */ | |
2494 ipa_update_overall_fn_summary (node); | |
2495 gcc_assert (info->size == info->self_size); | |
2496 } | |
2497 | |
2498 | |
2499 /* Compute parameters of functions used by inliner using | |
2500 current_function_decl. */ | |
2501 | |
2502 static unsigned int | |
2503 compute_fn_summary_for_current (void) | |
2504 { | |
2505 compute_fn_summary (cgraph_node::get (current_function_decl), true); | |
2506 return 0; | |
2507 } | |
2508 | |
2509 /* Estimate benefit devirtualizing indirect edge IE, provided KNOWN_VALS, | |
2510 KNOWN_CONTEXTS and KNOWN_AGGS. */ | |
2511 | |
2512 static bool | |
2513 estimate_edge_devirt_benefit (struct cgraph_edge *ie, | |
2514 int *size, int *time, | |
2515 vec<tree> known_vals, | |
2516 vec<ipa_polymorphic_call_context> known_contexts, | |
2517 vec<ipa_agg_jump_function_p> known_aggs) | |
2518 { | |
2519 tree target; | |
2520 struct cgraph_node *callee; | |
2521 struct ipa_fn_summary *isummary; | |
2522 enum availability avail; | |
2523 bool speculative; | |
2524 | |
2525 if (!known_vals.exists () && !known_contexts.exists ()) | |
2526 return false; | |
2527 if (!opt_for_fn (ie->caller->decl, flag_indirect_inlining)) | |
2528 return false; | |
2529 | |
2530 target = ipa_get_indirect_edge_target (ie, known_vals, known_contexts, | |
2531 known_aggs, &speculative); | |
2532 if (!target || speculative) | |
2533 return false; | |
2534 | |
2535 /* Account for difference in cost between indirect and direct calls. */ | |
2536 *size -= (eni_size_weights.indirect_call_cost - eni_size_weights.call_cost); | |
2537 *time -= (eni_time_weights.indirect_call_cost - eni_time_weights.call_cost); | |
2538 gcc_checking_assert (*time >= 0); | |
2539 gcc_checking_assert (*size >= 0); | |
2540 | |
2541 callee = cgraph_node::get (target); | |
2542 if (!callee || !callee->definition) | |
2543 return false; | |
2544 callee = callee->function_symbol (&avail); | |
2545 if (avail < AVAIL_AVAILABLE) | |
2546 return false; | |
2547 isummary = ipa_fn_summaries->get (callee); | |
2548 return isummary->inlinable; | |
2549 } | |
2550 | |
2551 /* Increase SIZE, MIN_SIZE (if non-NULL) and TIME for size and time needed to | |
2552 handle edge E with probability PROB. | |
2553 Set HINTS if edge may be devirtualized. | |
2554 KNOWN_VALS, KNOWN_AGGS and KNOWN_CONTEXTS describe context of the call | |
2555 site. */ | |
2556 | |
2557 static inline void | |
2558 estimate_edge_size_and_time (struct cgraph_edge *e, int *size, int *min_size, | |
2559 sreal *time, | |
2560 int prob, | |
2561 vec<tree> known_vals, | |
2562 vec<ipa_polymorphic_call_context> known_contexts, | |
2563 vec<ipa_agg_jump_function_p> known_aggs, | |
2564 ipa_hints *hints) | |
2565 { | |
2566 struct ipa_call_summary *es = ipa_call_summaries->get (e); | |
2567 int call_size = es->call_stmt_size; | |
2568 int call_time = es->call_stmt_time; | |
2569 int cur_size; | |
2570 if (!e->callee | |
2571 && estimate_edge_devirt_benefit (e, &call_size, &call_time, | |
2572 known_vals, known_contexts, known_aggs) | |
2573 && hints && e->maybe_hot_p ()) | |
2574 *hints |= INLINE_HINT_indirect_call; | |
2575 cur_size = call_size * ipa_fn_summary::size_scale; | |
2576 *size += cur_size; | |
2577 if (min_size) | |
2578 *min_size += cur_size; | |
2579 if (prob == REG_BR_PROB_BASE) | |
2580 *time += ((sreal)(call_time * e->frequency)) / CGRAPH_FREQ_BASE; | |
2581 else | |
2582 *time += ((sreal)call_time) * (prob * e->frequency) | |
2583 / (CGRAPH_FREQ_BASE * REG_BR_PROB_BASE); | |
2584 } | |
2585 | |
2586 | |
2587 | |
2588 /* Increase SIZE, MIN_SIZE and TIME for size and time needed to handle all | |
2589 calls in NODE. POSSIBLE_TRUTHS, KNOWN_VALS, KNOWN_AGGS and KNOWN_CONTEXTS | |
2590 describe context of the call site. */ | |
2591 | |
2592 static void | |
2593 estimate_calls_size_and_time (struct cgraph_node *node, int *size, | |
2594 int *min_size, sreal *time, | |
2595 ipa_hints *hints, | |
2596 clause_t possible_truths, | |
2597 vec<tree> known_vals, | |
2598 vec<ipa_polymorphic_call_context> known_contexts, | |
2599 vec<ipa_agg_jump_function_p> known_aggs) | |
2600 { | |
2601 struct cgraph_edge *e; | |
2602 for (e = node->callees; e; e = e->next_callee) | |
2603 { | |
2604 struct ipa_call_summary *es = ipa_call_summaries->get (e); | |
2605 | |
2606 /* Do not care about zero sized builtins. */ | |
2607 if (e->inline_failed && !es->call_stmt_size) | |
2608 { | |
2609 gcc_checking_assert (!es->call_stmt_time); | |
2610 continue; | |
2611 } | |
2612 if (!es->predicate | |
2613 || es->predicate->evaluate (possible_truths)) | |
2614 { | |
2615 if (e->inline_failed) | |
2616 { | |
2617 /* Predicates of calls shall not use NOT_CHANGED codes, | |
2618 sowe do not need to compute probabilities. */ | |
2619 estimate_edge_size_and_time (e, size, | |
2620 es->predicate ? NULL : min_size, | |
2621 time, REG_BR_PROB_BASE, | |
2622 known_vals, known_contexts, | |
2623 known_aggs, hints); | |
2624 } | |
2625 else | |
2626 estimate_calls_size_and_time (e->callee, size, min_size, time, | |
2627 hints, | |
2628 possible_truths, | |
2629 known_vals, known_contexts, | |
2630 known_aggs); | |
2631 } | |
2632 } | |
2633 for (e = node->indirect_calls; e; e = e->next_callee) | |
2634 { | |
2635 struct ipa_call_summary *es = ipa_call_summaries->get (e); | |
2636 if (!es->predicate | |
2637 || es->predicate->evaluate (possible_truths)) | |
2638 estimate_edge_size_and_time (e, size, | |
2639 es->predicate ? NULL : min_size, | |
2640 time, REG_BR_PROB_BASE, | |
2641 known_vals, known_contexts, known_aggs, | |
2642 hints); | |
2643 } | |
2644 } | |
2645 | |
2646 | |
2647 /* Estimate size and time needed to execute NODE assuming | |
2648 POSSIBLE_TRUTHS clause, and KNOWN_VALS, KNOWN_AGGS and KNOWN_CONTEXTS | |
2649 information about NODE's arguments. If non-NULL use also probability | |
2650 information present in INLINE_PARAM_SUMMARY vector. | |
2651 Additionally detemine hints determined by the context. Finally compute | |
2652 minimal size needed for the call that is independent on the call context and | |
2653 can be used for fast estimates. Return the values in RET_SIZE, | |
2654 RET_MIN_SIZE, RET_TIME and RET_HINTS. */ | |
2655 | |
2656 void | |
2657 estimate_node_size_and_time (struct cgraph_node *node, | |
2658 clause_t possible_truths, | |
2659 clause_t nonspec_possible_truths, | |
2660 vec<tree> known_vals, | |
2661 vec<ipa_polymorphic_call_context> known_contexts, | |
2662 vec<ipa_agg_jump_function_p> known_aggs, | |
2663 int *ret_size, int *ret_min_size, | |
2664 sreal *ret_time, | |
2665 sreal *ret_nonspecialized_time, | |
2666 ipa_hints *ret_hints, | |
2667 vec<inline_param_summary> | |
2668 inline_param_summary) | |
2669 { | |
2670 struct ipa_fn_summary *info = ipa_fn_summaries->get (node); | |
2671 size_time_entry *e; | |
2672 int size = 0; | |
2673 sreal time = 0; | |
2674 int min_size = 0; | |
2675 ipa_hints hints = 0; | |
2676 int i; | |
2677 | |
2678 if (dump_file && (dump_flags & TDF_DETAILS)) | |
2679 { | |
2680 bool found = false; | |
2681 fprintf (dump_file, " Estimating body: %s/%i\n" | |
2682 " Known to be false: ", node->name (), | |
2683 node->order); | |
2684 | |
2685 for (i = predicate::not_inlined_condition; | |
2686 i < (predicate::first_dynamic_condition | |
2687 + (int) vec_safe_length (info->conds)); i++) | |
2688 if (!(possible_truths & (1 << i))) | |
2689 { | |
2690 if (found) | |
2691 fprintf (dump_file, ", "); | |
2692 found = true; | |
2693 dump_condition (dump_file, info->conds, i); | |
2694 } | |
2695 } | |
2696 | |
2697 estimate_calls_size_and_time (node, &size, &min_size, &time, &hints, possible_truths, | |
2698 known_vals, known_contexts, known_aggs); | |
2699 sreal nonspecialized_time = time; | |
2700 | |
2701 for (i = 0; vec_safe_iterate (info->size_time_table, i, &e); i++) | |
2702 { | |
2703 bool exec = e->exec_predicate.evaluate (nonspec_possible_truths); | |
2704 | |
2705 /* Because predicates are conservative, it can happen that nonconst is 1 | |
2706 but exec is 0. */ | |
2707 if (exec) | |
2708 { | |
2709 bool nonconst = e->nonconst_predicate.evaluate (possible_truths); | |
2710 | |
2711 gcc_checking_assert (e->time >= 0); | |
2712 gcc_checking_assert (time >= 0); | |
2713 | |
2714 /* We compute specialized size only because size of nonspecialized | |
2715 copy is context independent. | |
2716 | |
2717 The difference between nonspecialized execution and specialized is | |
2718 that nonspecialized is not going to have optimized out computations | |
2719 known to be constant in a specialized setting. */ | |
2720 if (nonconst) | |
2721 size += e->size; | |
2722 nonspecialized_time += e->time; | |
2723 if (!nonconst) | |
2724 ; | |
2725 else if (!inline_param_summary.exists ()) | |
2726 { | |
2727 if (nonconst) | |
2728 time += e->time; | |
2729 } | |
2730 else | |
2731 { | |
2732 int prob = e->nonconst_predicate.probability | |
2733 (info->conds, possible_truths, | |
2734 inline_param_summary); | |
2735 gcc_checking_assert (prob >= 0); | |
2736 gcc_checking_assert (prob <= REG_BR_PROB_BASE); | |
2737 time += e->time * prob / REG_BR_PROB_BASE; | |
2738 } | |
2739 gcc_checking_assert (time >= 0); | |
2740 } | |
2741 } | |
2742 gcc_checking_assert ((*info->size_time_table)[0].exec_predicate == true); | |
2743 gcc_checking_assert ((*info->size_time_table)[0].nonconst_predicate == true); | |
2744 min_size = (*info->size_time_table)[0].size; | |
2745 gcc_checking_assert (size >= 0); | |
2746 gcc_checking_assert (time >= 0); | |
2747 /* nonspecialized_time should be always bigger than specialized time. | |
2748 Roundoff issues however may get into the way. */ | |
2749 gcc_checking_assert ((nonspecialized_time - time) >= -1); | |
2750 | |
2751 /* Roundoff issues may make specialized time bigger than nonspecialized | |
2752 time. We do not really want that to happen because some heurstics | |
2753 may get confused by seeing negative speedups. */ | |
2754 if (time > nonspecialized_time) | |
2755 time = nonspecialized_time; | |
2756 | |
2757 if (info->loop_iterations | |
2758 && !info->loop_iterations->evaluate (possible_truths)) | |
2759 hints |= INLINE_HINT_loop_iterations; | |
2760 if (info->loop_stride | |
2761 && !info->loop_stride->evaluate (possible_truths)) | |
2762 hints |= INLINE_HINT_loop_stride; | |
2763 if (info->array_index | |
2764 && !info->array_index->evaluate (possible_truths)) | |
2765 hints |= INLINE_HINT_array_index; | |
2766 if (info->scc_no) | |
2767 hints |= INLINE_HINT_in_scc; | |
2768 if (DECL_DECLARED_INLINE_P (node->decl)) | |
2769 hints |= INLINE_HINT_declared_inline; | |
2770 | |
2771 size = RDIV (size, ipa_fn_summary::size_scale); | |
2772 min_size = RDIV (min_size, ipa_fn_summary::size_scale); | |
2773 | |
2774 if (dump_file && (dump_flags & TDF_DETAILS)) | |
2775 fprintf (dump_file, "\n size:%i time:%f nonspec time:%f\n", (int) size, | |
2776 time.to_double (), nonspecialized_time.to_double ()); | |
2777 if (ret_time) | |
2778 *ret_time = time; | |
2779 if (ret_nonspecialized_time) | |
2780 *ret_nonspecialized_time = nonspecialized_time; | |
2781 if (ret_size) | |
2782 *ret_size = size; | |
2783 if (ret_min_size) | |
2784 *ret_min_size = min_size; | |
2785 if (ret_hints) | |
2786 *ret_hints = hints; | |
2787 return; | |
2788 } | |
2789 | |
2790 | |
2791 /* Estimate size and time needed to execute callee of EDGE assuming that | |
2792 parameters known to be constant at caller of EDGE are propagated. | |
2793 KNOWN_VALS and KNOWN_CONTEXTS are vectors of assumed known constant values | |
2794 and types for parameters. */ | |
2795 | |
2796 void | |
2797 estimate_ipcp_clone_size_and_time (struct cgraph_node *node, | |
2798 vec<tree> known_vals, | |
2799 vec<ipa_polymorphic_call_context> | |
2800 known_contexts, | |
2801 vec<ipa_agg_jump_function_p> known_aggs, | |
2802 int *ret_size, sreal *ret_time, | |
2803 sreal *ret_nonspec_time, | |
2804 ipa_hints *hints) | |
2805 { | |
2806 clause_t clause, nonspec_clause; | |
2807 | |
2808 evaluate_conditions_for_known_args (node, false, known_vals, known_aggs, | |
2809 &clause, &nonspec_clause); | |
2810 estimate_node_size_and_time (node, clause, nonspec_clause, | |
2811 known_vals, known_contexts, | |
2812 known_aggs, ret_size, NULL, ret_time, | |
2813 ret_nonspec_time, hints, vNULL); | |
2814 } | |
2815 | |
2816 | |
2817 /* Update summary information of inline clones after inlining. | |
2818 Compute peak stack usage. */ | |
2819 | |
2820 static void | |
2821 inline_update_callee_summaries (struct cgraph_node *node, int depth) | |
2822 { | |
2823 struct cgraph_edge *e; | |
2824 struct ipa_fn_summary *callee_info = ipa_fn_summaries->get (node); | |
2825 struct ipa_fn_summary *caller_info = ipa_fn_summaries->get (node->callers->caller); | |
2826 HOST_WIDE_INT peak; | |
2827 | |
2828 callee_info->stack_frame_offset | |
2829 = caller_info->stack_frame_offset | |
2830 + caller_info->estimated_self_stack_size; | |
2831 peak = callee_info->stack_frame_offset | |
2832 + callee_info->estimated_self_stack_size; | |
2833 if (ipa_fn_summaries->get (node->global.inlined_to)->estimated_stack_size < peak) | |
2834 ipa_fn_summaries->get (node->global.inlined_to)->estimated_stack_size = peak; | |
2835 ipa_propagate_frequency (node); | |
2836 for (e = node->callees; e; e = e->next_callee) | |
2837 { | |
2838 if (!e->inline_failed) | |
2839 inline_update_callee_summaries (e->callee, depth); | |
2840 ipa_call_summaries->get (e)->loop_depth += depth; | |
2841 } | |
2842 for (e = node->indirect_calls; e; e = e->next_callee) | |
2843 ipa_call_summaries->get (e)->loop_depth += depth; | |
2844 } | |
2845 | |
2846 /* Update change_prob of EDGE after INLINED_EDGE has been inlined. | |
2847 When functoin A is inlined in B and A calls C with parameter that | |
2848 changes with probability PROB1 and C is known to be passthroug | |
2849 of argument if B that change with probability PROB2, the probability | |
2850 of change is now PROB1*PROB2. */ | |
2851 | |
2852 static void | |
2853 remap_edge_change_prob (struct cgraph_edge *inlined_edge, | |
2854 struct cgraph_edge *edge) | |
2855 { | |
2856 if (ipa_node_params_sum) | |
2857 { | |
2858 int i; | |
2859 struct ipa_edge_args *args = IPA_EDGE_REF (edge); | |
2860 struct ipa_call_summary *es = ipa_call_summaries->get (edge); | |
2861 struct ipa_call_summary *inlined_es | |
2862 = ipa_call_summaries->get (inlined_edge); | |
2863 | |
2864 for (i = 0; i < ipa_get_cs_argument_count (args); i++) | |
2865 { | |
2866 struct ipa_jump_func *jfunc = ipa_get_ith_jump_func (args, i); | |
2867 if (jfunc->type == IPA_JF_PASS_THROUGH | |
2868 || jfunc->type == IPA_JF_ANCESTOR) | |
2869 { | |
2870 int id = jfunc->type == IPA_JF_PASS_THROUGH | |
2871 ? ipa_get_jf_pass_through_formal_id (jfunc) | |
2872 : ipa_get_jf_ancestor_formal_id (jfunc); | |
2873 if (id < (int) inlined_es->param.length ()) | |
2874 { | |
2875 int prob1 = es->param[i].change_prob; | |
2876 int prob2 = inlined_es->param[id].change_prob; | |
2877 int prob = combine_probabilities (prob1, prob2); | |
2878 | |
2879 if (prob1 && prob2 && !prob) | |
2880 prob = 1; | |
2881 | |
2882 es->param[i].change_prob = prob; | |
2883 } | |
2884 } | |
2885 } | |
2886 } | |
2887 } | |
2888 | |
2889 /* Update edge summaries of NODE after INLINED_EDGE has been inlined. | |
2890 | |
2891 Remap predicates of callees of NODE. Rest of arguments match | |
2892 remap_predicate. | |
2893 | |
2894 Also update change probabilities. */ | |
2895 | |
2896 static void | |
2897 remap_edge_summaries (struct cgraph_edge *inlined_edge, | |
2898 struct cgraph_node *node, | |
2899 struct ipa_fn_summary *info, | |
2900 struct ipa_fn_summary *callee_info, | |
2901 vec<int> operand_map, | |
2902 vec<int> offset_map, | |
2903 clause_t possible_truths, | |
2904 predicate *toplev_predicate) | |
2905 { | |
2906 struct cgraph_edge *e, *next; | |
2907 for (e = node->callees; e; e = next) | |
2908 { | |
2909 struct ipa_call_summary *es = ipa_call_summaries->get (e); | |
2910 predicate p; | |
2911 next = e->next_callee; | |
2912 | |
2913 if (e->inline_failed) | |
2914 { | |
2915 remap_edge_change_prob (inlined_edge, e); | |
2916 | |
2917 if (es->predicate) | |
2918 { | |
2919 p = es->predicate->remap_after_inlining | |
2920 (info, callee_info, operand_map, | |
2921 offset_map, possible_truths, | |
2922 *toplev_predicate); | |
2923 edge_set_predicate (e, &p); | |
2924 } | |
2925 else | |
2926 edge_set_predicate (e, toplev_predicate); | |
2927 } | |
2928 else | |
2929 remap_edge_summaries (inlined_edge, e->callee, info, callee_info, | |
2930 operand_map, offset_map, possible_truths, | |
2931 toplev_predicate); | |
2932 } | |
2933 for (e = node->indirect_calls; e; e = next) | |
2934 { | |
2935 struct ipa_call_summary *es = ipa_call_summaries->get (e); | |
2936 predicate p; | |
2937 next = e->next_callee; | |
2938 | |
2939 remap_edge_change_prob (inlined_edge, e); | |
2940 if (es->predicate) | |
2941 { | |
2942 p = es->predicate->remap_after_inlining | |
2943 (info, callee_info, operand_map, offset_map, | |
2944 possible_truths, *toplev_predicate); | |
2945 edge_set_predicate (e, &p); | |
2946 } | |
2947 else | |
2948 edge_set_predicate (e, toplev_predicate); | |
2949 } | |
2950 } | |
2951 | |
2952 /* Same as remap_predicate, but set result into hint *HINT. */ | |
2953 | |
2954 static void | |
2955 remap_hint_predicate (struct ipa_fn_summary *info, | |
2956 struct ipa_fn_summary *callee_info, | |
2957 predicate **hint, | |
2958 vec<int> operand_map, | |
2959 vec<int> offset_map, | |
2960 clause_t possible_truths, | |
2961 predicate *toplev_predicate) | |
2962 { | |
2963 predicate p; | |
2964 | |
2965 if (!*hint) | |
2966 return; | |
2967 p = (*hint)->remap_after_inlining | |
2968 (info, callee_info, | |
2969 operand_map, offset_map, | |
2970 possible_truths, *toplev_predicate); | |
2971 if (p != false && p != true) | |
2972 { | |
2973 if (!*hint) | |
2974 set_hint_predicate (hint, p); | |
2975 else | |
2976 **hint &= p; | |
2977 } | |
2978 } | |
2979 | |
2980 /* We inlined EDGE. Update summary of the function we inlined into. */ | |
2981 | |
2982 void | |
2983 ipa_merge_fn_summary_after_inlining (struct cgraph_edge *edge) | |
2984 { | |
2985 struct ipa_fn_summary *callee_info = ipa_fn_summaries->get (edge->callee); | |
2986 struct cgraph_node *to = (edge->caller->global.inlined_to | |
2987 ? edge->caller->global.inlined_to : edge->caller); | |
2988 struct ipa_fn_summary *info = ipa_fn_summaries->get (to); | |
2989 clause_t clause = 0; /* not_inline is known to be false. */ | |
2990 size_time_entry *e; | |
2991 vec<int> operand_map = vNULL; | |
2992 vec<int> offset_map = vNULL; | |
2993 int i; | |
2994 predicate toplev_predicate; | |
2995 predicate true_p = true; | |
2996 struct ipa_call_summary *es = ipa_call_summaries->get (edge); | |
2997 | |
2998 if (es->predicate) | |
2999 toplev_predicate = *es->predicate; | |
3000 else | |
3001 toplev_predicate = true; | |
3002 | |
3003 info->fp_expressions |= callee_info->fp_expressions; | |
3004 | |
3005 if (callee_info->conds) | |
3006 evaluate_properties_for_edge (edge, true, &clause, NULL, NULL, NULL, NULL); | |
3007 if (ipa_node_params_sum && callee_info->conds) | |
3008 { | |
3009 struct ipa_edge_args *args = IPA_EDGE_REF (edge); | |
3010 int count = ipa_get_cs_argument_count (args); | |
3011 int i; | |
3012 | |
3013 if (count) | |
3014 { | |
3015 operand_map.safe_grow_cleared (count); | |
3016 offset_map.safe_grow_cleared (count); | |
3017 } | |
3018 for (i = 0; i < count; i++) | |
3019 { | |
3020 struct ipa_jump_func *jfunc = ipa_get_ith_jump_func (args, i); | |
3021 int map = -1; | |
3022 | |
3023 /* TODO: handle non-NOPs when merging. */ | |
3024 if (jfunc->type == IPA_JF_PASS_THROUGH) | |
3025 { | |
3026 if (ipa_get_jf_pass_through_operation (jfunc) == NOP_EXPR) | |
3027 map = ipa_get_jf_pass_through_formal_id (jfunc); | |
3028 if (!ipa_get_jf_pass_through_agg_preserved (jfunc)) | |
3029 offset_map[i] = -1; | |
3030 } | |
3031 else if (jfunc->type == IPA_JF_ANCESTOR) | |
3032 { | |
3033 HOST_WIDE_INT offset = ipa_get_jf_ancestor_offset (jfunc); | |
3034 if (offset >= 0 && offset < INT_MAX) | |
3035 { | |
3036 map = ipa_get_jf_ancestor_formal_id (jfunc); | |
3037 if (!ipa_get_jf_ancestor_agg_preserved (jfunc)) | |
3038 offset = -1; | |
3039 offset_map[i] = offset; | |
3040 } | |
3041 } | |
3042 operand_map[i] = map; | |
3043 gcc_assert (map < ipa_get_param_count (IPA_NODE_REF (to))); | |
3044 } | |
3045 } | |
3046 for (i = 0; vec_safe_iterate (callee_info->size_time_table, i, &e); i++) | |
3047 { | |
3048 predicate p; | |
3049 p = e->exec_predicate.remap_after_inlining | |
3050 (info, callee_info, operand_map, | |
3051 offset_map, clause, | |
3052 toplev_predicate); | |
3053 predicate nonconstp; | |
3054 nonconstp = e->nonconst_predicate.remap_after_inlining | |
3055 (info, callee_info, operand_map, | |
3056 offset_map, clause, | |
3057 toplev_predicate); | |
3058 if (p != false && nonconstp != false) | |
3059 { | |
3060 sreal add_time = ((sreal)e->time * edge->frequency) / CGRAPH_FREQ_BASE; | |
3061 int prob = e->nonconst_predicate.probability (callee_info->conds, | |
3062 clause, es->param); | |
3063 add_time = add_time * prob / REG_BR_PROB_BASE; | |
3064 if (prob != REG_BR_PROB_BASE | |
3065 && dump_file && (dump_flags & TDF_DETAILS)) | |
3066 { | |
3067 fprintf (dump_file, "\t\tScaling time by probability:%f\n", | |
3068 (double) prob / REG_BR_PROB_BASE); | |
3069 } | |
3070 info->account_size_time (e->size, add_time, p, nonconstp); | |
3071 } | |
3072 } | |
3073 remap_edge_summaries (edge, edge->callee, info, callee_info, operand_map, | |
3074 offset_map, clause, &toplev_predicate); | |
3075 remap_hint_predicate (info, callee_info, | |
3076 &callee_info->loop_iterations, | |
3077 operand_map, offset_map, clause, &toplev_predicate); | |
3078 remap_hint_predicate (info, callee_info, | |
3079 &callee_info->loop_stride, | |
3080 operand_map, offset_map, clause, &toplev_predicate); | |
3081 remap_hint_predicate (info, callee_info, | |
3082 &callee_info->array_index, | |
3083 operand_map, offset_map, clause, &toplev_predicate); | |
3084 | |
3085 inline_update_callee_summaries (edge->callee, | |
3086 ipa_call_summaries->get (edge)->loop_depth); | |
3087 | |
3088 /* We do not maintain predicates of inlined edges, free it. */ | |
3089 edge_set_predicate (edge, &true_p); | |
3090 /* Similarly remove param summaries. */ | |
3091 es->param.release (); | |
3092 operand_map.release (); | |
3093 offset_map.release (); | |
3094 } | |
3095 | |
3096 /* For performance reasons ipa_merge_fn_summary_after_inlining is not updating overall size | |
3097 and time. Recompute it. */ | |
3098 | |
3099 void | |
3100 ipa_update_overall_fn_summary (struct cgraph_node *node) | |
3101 { | |
3102 struct ipa_fn_summary *info = ipa_fn_summaries->get (node); | |
3103 size_time_entry *e; | |
3104 int i; | |
3105 | |
3106 info->size = 0; | |
3107 info->time = 0; | |
3108 for (i = 0; vec_safe_iterate (info->size_time_table, i, &e); i++) | |
3109 { | |
3110 info->size += e->size; | |
3111 info->time += e->time; | |
3112 } | |
3113 estimate_calls_size_and_time (node, &info->size, &info->min_size, | |
3114 &info->time, NULL, | |
3115 ~(clause_t) (1 << predicate::false_condition), | |
3116 vNULL, vNULL, vNULL); | |
3117 info->size = (info->size + ipa_fn_summary::size_scale / 2) / ipa_fn_summary::size_scale; | |
3118 } | |
3119 | |
3120 | |
3121 /* This function performs intraprocedural analysis in NODE that is required to | |
3122 inline indirect calls. */ | |
3123 | |
3124 static void | |
3125 inline_indirect_intraprocedural_analysis (struct cgraph_node *node) | |
3126 { | |
3127 ipa_analyze_node (node); | |
3128 if (dump_file && (dump_flags & TDF_DETAILS)) | |
3129 { | |
3130 ipa_print_node_params (dump_file, node); | |
3131 ipa_print_node_jump_functions (dump_file, node); | |
3132 } | |
3133 } | |
3134 | |
3135 | |
3136 /* Note function body size. */ | |
3137 | |
3138 void | |
3139 inline_analyze_function (struct cgraph_node *node) | |
3140 { | |
3141 push_cfun (DECL_STRUCT_FUNCTION (node->decl)); | |
3142 | |
3143 if (dump_file) | |
3144 fprintf (dump_file, "\nAnalyzing function: %s/%u\n", | |
3145 node->name (), node->order); | |
3146 if (opt_for_fn (node->decl, optimize) && !node->thunk.thunk_p) | |
3147 inline_indirect_intraprocedural_analysis (node); | |
3148 compute_fn_summary (node, false); | |
3149 if (!optimize) | |
3150 { | |
3151 struct cgraph_edge *e; | |
3152 for (e = node->callees; e; e = e->next_callee) | |
3153 e->inline_failed = CIF_FUNCTION_NOT_OPTIMIZED; | |
3154 for (e = node->indirect_calls; e; e = e->next_callee) | |
3155 e->inline_failed = CIF_FUNCTION_NOT_OPTIMIZED; | |
3156 } | |
3157 | |
3158 pop_cfun (); | |
3159 } | |
3160 | |
3161 | |
3162 /* Called when new function is inserted to callgraph late. */ | |
3163 | |
3164 void | |
3165 ipa_fn_summary_t::insert (struct cgraph_node *node, ipa_fn_summary *) | |
3166 { | |
3167 inline_analyze_function (node); | |
3168 } | |
3169 | |
3170 /* Note function body size. */ | |
3171 | |
3172 static void | |
3173 ipa_fn_summary_generate (void) | |
3174 { | |
3175 struct cgraph_node *node; | |
3176 | |
3177 FOR_EACH_DEFINED_FUNCTION (node) | |
3178 if (DECL_STRUCT_FUNCTION (node->decl)) | |
3179 node->local.versionable = tree_versionable_function_p (node->decl); | |
3180 | |
3181 ipa_fn_summary_alloc (); | |
3182 | |
3183 ipa_fn_summaries->enable_insertion_hook (); | |
3184 | |
3185 ipa_register_cgraph_hooks (); | |
3186 | |
3187 FOR_EACH_DEFINED_FUNCTION (node) | |
3188 if (!node->alias | |
3189 && (flag_generate_lto || flag_generate_offload|| flag_wpa | |
3190 || opt_for_fn (node->decl, optimize))) | |
3191 inline_analyze_function (node); | |
3192 } | |
3193 | |
3194 | |
3195 /* Write inline summary for edge E to OB. */ | |
3196 | |
3197 static void | |
3198 read_ipa_call_summary (struct lto_input_block *ib, struct cgraph_edge *e) | |
3199 { | |
3200 struct ipa_call_summary *es = ipa_call_summaries->get (e); | |
3201 predicate p; | |
3202 int length, i; | |
3203 | |
3204 es->call_stmt_size = streamer_read_uhwi (ib); | |
3205 es->call_stmt_time = streamer_read_uhwi (ib); | |
3206 es->loop_depth = streamer_read_uhwi (ib); | |
3207 p.stream_in (ib); | |
3208 edge_set_predicate (e, &p); | |
3209 length = streamer_read_uhwi (ib); | |
3210 if (length) | |
3211 { | |
3212 es->param.safe_grow_cleared (length); | |
3213 for (i = 0; i < length; i++) | |
3214 es->param[i].change_prob = streamer_read_uhwi (ib); | |
3215 } | |
3216 } | |
3217 | |
3218 | |
3219 /* Stream in inline summaries from the section. */ | |
3220 | |
3221 static void | |
3222 inline_read_section (struct lto_file_decl_data *file_data, const char *data, | |
3223 size_t len) | |
3224 { | |
3225 const struct lto_function_header *header = | |
3226 (const struct lto_function_header *) data; | |
3227 const int cfg_offset = sizeof (struct lto_function_header); | |
3228 const int main_offset = cfg_offset + header->cfg_size; | |
3229 const int string_offset = main_offset + header->main_size; | |
3230 struct data_in *data_in; | |
3231 unsigned int i, count2, j; | |
3232 unsigned int f_count; | |
3233 | |
3234 lto_input_block ib ((const char *) data + main_offset, header->main_size, | |
3235 file_data->mode_table); | |
3236 | |
3237 data_in = | |
3238 lto_data_in_create (file_data, (const char *) data + string_offset, | |
3239 header->string_size, vNULL); | |
3240 f_count = streamer_read_uhwi (&ib); | |
3241 for (i = 0; i < f_count; i++) | |
3242 { | |
3243 unsigned int index; | |
3244 struct cgraph_node *node; | |
3245 struct ipa_fn_summary *info; | |
3246 lto_symtab_encoder_t encoder; | |
3247 struct bitpack_d bp; | |
3248 struct cgraph_edge *e; | |
3249 predicate p; | |
3250 | |
3251 index = streamer_read_uhwi (&ib); | |
3252 encoder = file_data->symtab_node_encoder; | |
3253 node = dyn_cast<cgraph_node *> (lto_symtab_encoder_deref (encoder, | |
3254 index)); | |
3255 info = ipa_fn_summaries->get (node); | |
3256 | |
3257 info->estimated_stack_size | |
3258 = info->estimated_self_stack_size = streamer_read_uhwi (&ib); | |
3259 info->size = info->self_size = streamer_read_uhwi (&ib); | |
3260 info->time = sreal::stream_in (&ib); | |
3261 | |
3262 bp = streamer_read_bitpack (&ib); | |
3263 info->inlinable = bp_unpack_value (&bp, 1); | |
3264 info->contains_cilk_spawn = bp_unpack_value (&bp, 1); | |
3265 info->fp_expressions = bp_unpack_value (&bp, 1); | |
3266 | |
3267 count2 = streamer_read_uhwi (&ib); | |
3268 gcc_assert (!info->conds); | |
3269 for (j = 0; j < count2; j++) | |
3270 { | |
3271 struct condition c; | |
3272 c.operand_num = streamer_read_uhwi (&ib); | |
3273 c.size = streamer_read_uhwi (&ib); | |
3274 c.code = (enum tree_code) streamer_read_uhwi (&ib); | |
3275 c.val = stream_read_tree (&ib, data_in); | |
3276 bp = streamer_read_bitpack (&ib); | |
3277 c.agg_contents = bp_unpack_value (&bp, 1); | |
3278 c.by_ref = bp_unpack_value (&bp, 1); | |
3279 if (c.agg_contents) | |
3280 c.offset = streamer_read_uhwi (&ib); | |
3281 vec_safe_push (info->conds, c); | |
3282 } | |
3283 count2 = streamer_read_uhwi (&ib); | |
3284 gcc_assert (!info->size_time_table); | |
3285 for (j = 0; j < count2; j++) | |
3286 { | |
3287 struct size_time_entry e; | |
3288 | |
3289 e.size = streamer_read_uhwi (&ib); | |
3290 e.time = sreal::stream_in (&ib); | |
3291 e.exec_predicate.stream_in (&ib); | |
3292 e.nonconst_predicate.stream_in (&ib); | |
3293 | |
3294 vec_safe_push (info->size_time_table, e); | |
3295 } | |
3296 | |
3297 p.stream_in (&ib); | |
3298 set_hint_predicate (&info->loop_iterations, p); | |
3299 p.stream_in (&ib); | |
3300 set_hint_predicate (&info->loop_stride, p); | |
3301 p.stream_in (&ib); | |
3302 set_hint_predicate (&info->array_index, p); | |
3303 for (e = node->callees; e; e = e->next_callee) | |
3304 read_ipa_call_summary (&ib, e); | |
3305 for (e = node->indirect_calls; e; e = e->next_callee) | |
3306 read_ipa_call_summary (&ib, e); | |
3307 } | |
3308 | |
3309 lto_free_section_data (file_data, LTO_section_ipa_fn_summary, NULL, data, | |
3310 len); | |
3311 lto_data_in_delete (data_in); | |
3312 } | |
3313 | |
3314 | |
3315 /* Read inline summary. Jump functions are shared among ipa-cp | |
3316 and inliner, so when ipa-cp is active, we don't need to write them | |
3317 twice. */ | |
3318 | |
3319 static void | |
3320 ipa_fn_summary_read (void) | |
3321 { | |
3322 struct lto_file_decl_data **file_data_vec = lto_get_file_decl_data (); | |
3323 struct lto_file_decl_data *file_data; | |
3324 unsigned int j = 0; | |
3325 | |
3326 ipa_fn_summary_alloc (); | |
3327 | |
3328 while ((file_data = file_data_vec[j++])) | |
3329 { | |
3330 size_t len; | |
3331 const char *data = lto_get_section_data (file_data, | |
3332 LTO_section_ipa_fn_summary, | |
3333 NULL, &len); | |
3334 if (data) | |
3335 inline_read_section (file_data, data, len); | |
3336 else | |
3337 /* Fatal error here. We do not want to support compiling ltrans units | |
3338 with different version of compiler or different flags than the WPA | |
3339 unit, so this should never happen. */ | |
3340 fatal_error (input_location, | |
3341 "ipa inline summary is missing in input file"); | |
3342 } | |
3343 ipa_register_cgraph_hooks (); | |
3344 if (!flag_ipa_cp) | |
3345 ipa_prop_read_jump_functions (); | |
3346 | |
3347 gcc_assert (ipa_fn_summaries); | |
3348 ipa_fn_summaries->enable_insertion_hook (); | |
3349 } | |
3350 | |
3351 | |
3352 /* Write inline summary for edge E to OB. */ | |
3353 | |
3354 static void | |
3355 write_ipa_call_summary (struct output_block *ob, struct cgraph_edge *e) | |
3356 { | |
3357 struct ipa_call_summary *es = ipa_call_summaries->get (e); | |
3358 int i; | |
3359 | |
3360 streamer_write_uhwi (ob, es->call_stmt_size); | |
3361 streamer_write_uhwi (ob, es->call_stmt_time); | |
3362 streamer_write_uhwi (ob, es->loop_depth); | |
3363 if (es->predicate) | |
3364 es->predicate->stream_out (ob); | |
3365 else | |
3366 streamer_write_uhwi (ob, 0); | |
3367 streamer_write_uhwi (ob, es->param.length ()); | |
3368 for (i = 0; i < (int) es->param.length (); i++) | |
3369 streamer_write_uhwi (ob, es->param[i].change_prob); | |
3370 } | |
3371 | |
3372 | |
3373 /* Write inline summary for node in SET. | |
3374 Jump functions are shared among ipa-cp and inliner, so when ipa-cp is | |
3375 active, we don't need to write them twice. */ | |
3376 | |
3377 static void | |
3378 ipa_fn_summary_write (void) | |
3379 { | |
3380 struct output_block *ob = create_output_block (LTO_section_ipa_fn_summary); | |
3381 lto_symtab_encoder_t encoder = ob->decl_state->symtab_node_encoder; | |
3382 unsigned int count = 0; | |
3383 int i; | |
3384 | |
3385 for (i = 0; i < lto_symtab_encoder_size (encoder); i++) | |
3386 { | |
3387 symtab_node *snode = lto_symtab_encoder_deref (encoder, i); | |
3388 cgraph_node *cnode = dyn_cast <cgraph_node *> (snode); | |
3389 if (cnode && cnode->definition && !cnode->alias) | |
3390 count++; | |
3391 } | |
3392 streamer_write_uhwi (ob, count); | |
3393 | |
3394 for (i = 0; i < lto_symtab_encoder_size (encoder); i++) | |
3395 { | |
3396 symtab_node *snode = lto_symtab_encoder_deref (encoder, i); | |
3397 cgraph_node *cnode = dyn_cast <cgraph_node *> (snode); | |
3398 if (cnode && cnode->definition && !cnode->alias) | |
3399 { | |
3400 struct ipa_fn_summary *info = ipa_fn_summaries->get (cnode); | |
3401 struct bitpack_d bp; | |
3402 struct cgraph_edge *edge; | |
3403 int i; | |
3404 size_time_entry *e; | |
3405 struct condition *c; | |
3406 | |
3407 streamer_write_uhwi (ob, lto_symtab_encoder_encode (encoder, cnode)); | |
3408 streamer_write_hwi (ob, info->estimated_self_stack_size); | |
3409 streamer_write_hwi (ob, info->self_size); | |
3410 info->time.stream_out (ob); | |
3411 bp = bitpack_create (ob->main_stream); | |
3412 bp_pack_value (&bp, info->inlinable, 1); | |
3413 bp_pack_value (&bp, info->contains_cilk_spawn, 1); | |
3414 bp_pack_value (&bp, info->fp_expressions, 1); | |
3415 streamer_write_bitpack (&bp); | |
3416 streamer_write_uhwi (ob, vec_safe_length (info->conds)); | |
3417 for (i = 0; vec_safe_iterate (info->conds, i, &c); i++) | |
3418 { | |
3419 streamer_write_uhwi (ob, c->operand_num); | |
3420 streamer_write_uhwi (ob, c->size); | |
3421 streamer_write_uhwi (ob, c->code); | |
3422 stream_write_tree (ob, c->val, true); | |
3423 bp = bitpack_create (ob->main_stream); | |
3424 bp_pack_value (&bp, c->agg_contents, 1); | |
3425 bp_pack_value (&bp, c->by_ref, 1); | |
3426 streamer_write_bitpack (&bp); | |
3427 if (c->agg_contents) | |
3428 streamer_write_uhwi (ob, c->offset); | |
3429 } | |
3430 streamer_write_uhwi (ob, vec_safe_length (info->size_time_table)); | |
3431 for (i = 0; vec_safe_iterate (info->size_time_table, i, &e); i++) | |
3432 { | |
3433 streamer_write_uhwi (ob, e->size); | |
3434 e->time.stream_out (ob); | |
3435 e->exec_predicate.stream_out (ob); | |
3436 e->nonconst_predicate.stream_out (ob); | |
3437 } | |
3438 if (info->loop_iterations) | |
3439 info->loop_iterations->stream_out (ob); | |
3440 else | |
3441 streamer_write_uhwi (ob, 0); | |
3442 if (info->loop_stride) | |
3443 info->loop_stride->stream_out (ob); | |
3444 else | |
3445 streamer_write_uhwi (ob, 0); | |
3446 if (info->array_index) | |
3447 info->array_index->stream_out (ob); | |
3448 else | |
3449 streamer_write_uhwi (ob, 0); | |
3450 for (edge = cnode->callees; edge; edge = edge->next_callee) | |
3451 write_ipa_call_summary (ob, edge); | |
3452 for (edge = cnode->indirect_calls; edge; edge = edge->next_callee) | |
3453 write_ipa_call_summary (ob, edge); | |
3454 } | |
3455 } | |
3456 streamer_write_char_stream (ob->main_stream, 0); | |
3457 produce_asm (ob, NULL); | |
3458 destroy_output_block (ob); | |
3459 | |
3460 if (!flag_ipa_cp) | |
3461 ipa_prop_write_jump_functions (); | |
3462 } | |
3463 | |
3464 | |
3465 /* Release inline summary. */ | |
3466 | |
3467 void | |
3468 ipa_free_fn_summary (void) | |
3469 { | |
3470 struct cgraph_node *node; | |
3471 if (!ipa_call_summaries) | |
3472 return; | |
3473 FOR_EACH_DEFINED_FUNCTION (node) | |
3474 if (!node->alias) | |
3475 ipa_fn_summaries->get (node)->reset (node); | |
3476 ipa_fn_summaries->release (); | |
3477 ipa_fn_summaries = NULL; | |
3478 ipa_call_summaries->release (); | |
3479 delete ipa_call_summaries; | |
3480 ipa_call_summaries = NULL; | |
3481 edge_predicate_pool.release (); | |
3482 } | |
3483 | |
3484 namespace { | |
3485 | |
3486 const pass_data pass_data_local_fn_summary = | |
3487 { | |
3488 GIMPLE_PASS, /* type */ | |
3489 "local-fnsummary", /* name */ | |
3490 OPTGROUP_INLINE, /* optinfo_flags */ | |
3491 TV_INLINE_PARAMETERS, /* tv_id */ | |
3492 0, /* properties_required */ | |
3493 0, /* properties_provided */ | |
3494 0, /* properties_destroyed */ | |
3495 0, /* todo_flags_start */ | |
3496 0, /* todo_flags_finish */ | |
3497 }; | |
3498 | |
3499 class pass_local_fn_summary : public gimple_opt_pass | |
3500 { | |
3501 public: | |
3502 pass_local_fn_summary (gcc::context *ctxt) | |
3503 : gimple_opt_pass (pass_data_local_fn_summary, ctxt) | |
3504 {} | |
3505 | |
3506 /* opt_pass methods: */ | |
3507 opt_pass * clone () { return new pass_local_fn_summary (m_ctxt); } | |
3508 virtual unsigned int execute (function *) | |
3509 { | |
3510 return compute_fn_summary_for_current (); | |
3511 } | |
3512 | |
3513 }; // class pass_local_fn_summary | |
3514 | |
3515 } // anon namespace | |
3516 | |
3517 gimple_opt_pass * | |
3518 make_pass_local_fn_summary (gcc::context *ctxt) | |
3519 { | |
3520 return new pass_local_fn_summary (ctxt); | |
3521 } | |
3522 | |
3523 | |
3524 /* Free inline summary. */ | |
3525 | |
3526 namespace { | |
3527 | |
3528 const pass_data pass_data_ipa_free_fn_summary = | |
3529 { | |
3530 SIMPLE_IPA_PASS, /* type */ | |
3531 "free-fnsummary", /* name */ | |
3532 OPTGROUP_NONE, /* optinfo_flags */ | |
3533 TV_IPA_FREE_INLINE_SUMMARY, /* tv_id */ | |
3534 0, /* properties_required */ | |
3535 0, /* properties_provided */ | |
3536 0, /* properties_destroyed */ | |
3537 0, /* todo_flags_start */ | |
3538 /* Early optimizations may make function unreachable. We can not | |
3539 remove unreachable functions as part of the ealry opts pass because | |
3540 TODOs are run before subpasses. Do it here. */ | |
3541 ( TODO_remove_functions | TODO_dump_symtab ), /* todo_flags_finish */ | |
3542 }; | |
3543 | |
3544 class pass_ipa_free_fn_summary : public simple_ipa_opt_pass | |
3545 { | |
3546 public: | |
3547 pass_ipa_free_fn_summary (gcc::context *ctxt) | |
3548 : simple_ipa_opt_pass (pass_data_ipa_free_fn_summary, ctxt) | |
3549 {} | |
3550 | |
3551 /* opt_pass methods: */ | |
3552 virtual unsigned int execute (function *) | |
3553 { | |
3554 ipa_free_fn_summary (); | |
3555 return 0; | |
3556 } | |
3557 | |
3558 }; // class pass_ipa_free_fn_summary | |
3559 | |
3560 } // anon namespace | |
3561 | |
3562 simple_ipa_opt_pass * | |
3563 make_pass_ipa_free_fn_summary (gcc::context *ctxt) | |
3564 { | |
3565 return new pass_ipa_free_fn_summary (ctxt); | |
3566 } | |
3567 | |
3568 namespace { | |
3569 | |
3570 const pass_data pass_data_ipa_fn_summary = | |
3571 { | |
3572 IPA_PASS, /* type */ | |
3573 "fnsummary", /* name */ | |
3574 OPTGROUP_INLINE, /* optinfo_flags */ | |
3575 TV_IPA_FNSUMMARY, /* tv_id */ | |
3576 0, /* properties_required */ | |
3577 0, /* properties_provided */ | |
3578 0, /* properties_destroyed */ | |
3579 0, /* todo_flags_start */ | |
3580 ( TODO_dump_symtab ), /* todo_flags_finish */ | |
3581 }; | |
3582 | |
3583 class pass_ipa_fn_summary : public ipa_opt_pass_d | |
3584 { | |
3585 public: | |
3586 pass_ipa_fn_summary (gcc::context *ctxt) | |
3587 : ipa_opt_pass_d (pass_data_ipa_fn_summary, ctxt, | |
3588 ipa_fn_summary_generate, /* generate_summary */ | |
3589 ipa_fn_summary_write, /* write_summary */ | |
3590 ipa_fn_summary_read, /* read_summary */ | |
3591 NULL, /* write_optimization_summary */ | |
3592 NULL, /* read_optimization_summary */ | |
3593 NULL, /* stmt_fixup */ | |
3594 0, /* function_transform_todo_flags_start */ | |
3595 NULL, /* function_transform */ | |
3596 NULL) /* variable_transform */ | |
3597 {} | |
3598 | |
3599 /* opt_pass methods: */ | |
3600 virtual unsigned int execute (function *) { return 0; } | |
3601 | |
3602 }; // class pass_ipa_fn_summary | |
3603 | |
3604 } // anon namespace | |
3605 | |
3606 ipa_opt_pass_d * | |
3607 make_pass_ipa_fn_summary (gcc::context *ctxt) | |
3608 { | |
3609 return new pass_ipa_fn_summary (ctxt); | |
3610 } |