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d119f34c | 1 | /* Search for references that a functions loads or stores. |
7adcbafe | 2 | Copyright (C) 2020-2022 Free Software Foundation, Inc. |
d119f34c JH |
3 | Contributed by David Cepelik and 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 | /* Mod/ref pass records summary about loads and stores performed by the | |
22 | function. This is later used by alias analysis to disambiguate memory | |
85ebbabd | 23 | accesses across function calls. |
d119f34c JH |
24 | |
25 | This file contains a tree pass and an IPA pass. Both performs the same | |
8a2fd716 | 26 | analysis however tree pass is executed during early and late optimization |
d119f34c JH |
27 | passes to propagate info downwards in the compilation order. IPA pass |
28 | propagates across the callgraph and is able to handle recursion and works on | |
29 | whole program during link-time analysis. | |
30 | ||
46a27415 | 31 | LTO mode differs from the local mode by not recording alias sets but types |
d119f34c | 32 | that are translated to alias sets later. This is necessary in order stream |
46a27415 | 33 | the information because the alias sets are rebuild at stream-in time and may |
85ebbabd JH |
34 | not correspond to ones seen during analysis. For this reason part of |
35 | analysis is duplicated. | |
36 | ||
37 | The following information is computed | |
38 | 1) load/store access tree described in ipa-modref-tree.h | |
11056ab7 | 39 | This is used by tree-ssa-alias to disambiguate load/stores |
02c80893 | 40 | 2) EAF flags used by points-to analysis (in tree-ssa-structalias). |
85ebbabd JH |
41 | and defined in tree-core.h. |
42 | and stored to optimization_summaries. | |
43 | ||
44 | There are multiple summaries computed and used during the propagation: | |
45 | - summaries holds summaries from analysis to IPA propagation | |
46 | time. | |
47 | - summaries_lto is same as summaries but holds them in a format | |
48 | that can be streamed (as described above). | |
49 | - fnspec_summary holds fnspec strings for call. This is | |
50 | necessary because gimple_call_fnspec performs additional | |
51 | analysis except for looking callee fndecl. | |
52 | - escape_summary holds escape points for given call edge. | |
02c80893 | 53 | That is a vector recording what function parameters |
85ebbabd | 54 | may escape to a function call (and with what parameter index). */ |
d119f34c JH |
55 | |
56 | #include "config.h" | |
57 | #include "system.h" | |
58 | #include "coretypes.h" | |
59 | #include "backend.h" | |
60 | #include "tree.h" | |
61 | #include "gimple.h" | |
62 | #include "alloc-pool.h" | |
63 | #include "tree-pass.h" | |
64 | #include "gimple-iterator.h" | |
65 | #include "tree-dfa.h" | |
66 | #include "cgraph.h" | |
67 | #include "ipa-utils.h" | |
68 | #include "symbol-summary.h" | |
69 | #include "gimple-pretty-print.h" | |
70 | #include "gimple-walk.h" | |
71 | #include "print-tree.h" | |
72 | #include "tree-streamer.h" | |
73 | #include "alias.h" | |
74 | #include "calls.h" | |
75 | #include "ipa-modref-tree.h" | |
76 | #include "ipa-modref.h" | |
e977dd5e JH |
77 | #include "value-range.h" |
78 | #include "ipa-prop.h" | |
79 | #include "ipa-fnsummary.h" | |
617695cd | 80 | #include "attr-fnspec.h" |
ae7a23a3 | 81 | #include "symtab-clones.h" |
520d5ad3 JH |
82 | #include "gimple-ssa.h" |
83 | #include "tree-phinodes.h" | |
84 | #include "tree-ssa-operands.h" | |
85 | #include "ssa-iterators.h" | |
86 | #include "stringpool.h" | |
87 | #include "tree-ssanames.h" | |
008e7397 | 88 | #include "attribs.h" |
b8ef019a | 89 | #include "tree-cfg.h" |
992644c3 | 90 | #include "tree-eh.h" |
520d5ad3 | 91 | |
8da8ed43 | 92 | |
85ebbabd | 93 | namespace { |
d119f34c | 94 | |
6cef01c3 JH |
95 | /* We record fnspec specifiers for call edges since they depends on actual |
96 | gimple statements. */ | |
97 | ||
98 | class fnspec_summary | |
99 | { | |
100 | public: | |
101 | char *fnspec; | |
102 | ||
103 | fnspec_summary () | |
104 | : fnspec (NULL) | |
105 | { | |
106 | } | |
107 | ||
108 | ~fnspec_summary () | |
109 | { | |
110 | free (fnspec); | |
111 | } | |
112 | }; | |
113 | ||
114 | /* Summary holding fnspec string for a given call. */ | |
115 | ||
116 | class fnspec_summaries_t : public call_summary <fnspec_summary *> | |
117 | { | |
118 | public: | |
119 | fnspec_summaries_t (symbol_table *symtab) | |
120 | : call_summary <fnspec_summary *> (symtab) {} | |
121 | /* Hook that is called by summary when an edge is duplicated. */ | |
f31ba116 DM |
122 | void duplicate (cgraph_edge *, |
123 | cgraph_edge *, | |
124 | fnspec_summary *src, | |
125 | fnspec_summary *dst) final override | |
6cef01c3 JH |
126 | { |
127 | dst->fnspec = xstrdup (src->fnspec); | |
128 | } | |
129 | }; | |
130 | ||
131 | static fnspec_summaries_t *fnspec_summaries = NULL; | |
132 | ||
85ebbabd JH |
133 | /* Escape summary holds a vector of param indexes that escape to |
134 | a given call. */ | |
135 | struct escape_entry | |
136 | { | |
137 | /* Parameter that escapes at a given call. */ | |
b8ef019a | 138 | int parm_index; |
85ebbabd JH |
139 | /* Argument it escapes to. */ |
140 | unsigned int arg; | |
141 | /* Minimal flags known about the argument. */ | |
8da8ed43 | 142 | eaf_flags_t min_flags; |
85ebbabd JH |
143 | /* Does it escape directly or indirectly? */ |
144 | bool direct; | |
145 | }; | |
146 | ||
147 | /* Dump EAF flags. */ | |
148 | ||
149 | static void | |
150 | dump_eaf_flags (FILE *out, int flags, bool newline = true) | |
151 | { | |
85ebbabd JH |
152 | if (flags & EAF_UNUSED) |
153 | fprintf (out, " unused"); | |
d70ef656 JH |
154 | if (flags & EAF_NO_DIRECT_CLOBBER) |
155 | fprintf (out, " no_direct_clobber"); | |
156 | if (flags & EAF_NO_INDIRECT_CLOBBER) | |
157 | fprintf (out, " no_indirect_clobber"); | |
158 | if (flags & EAF_NO_DIRECT_ESCAPE) | |
159 | fprintf (out, " no_direct_escape"); | |
160 | if (flags & EAF_NO_INDIRECT_ESCAPE) | |
161 | fprintf (out, " no_indirect_escape"); | |
f1979156 JH |
162 | if (flags & EAF_NOT_RETURNED_DIRECTLY) |
163 | fprintf (out, " not_returned_directly"); | |
d70ef656 JH |
164 | if (flags & EAF_NOT_RETURNED_INDIRECTLY) |
165 | fprintf (out, " not_returned_indirectly"); | |
166 | if (flags & EAF_NO_DIRECT_READ) | |
167 | fprintf (out, " no_direct_read"); | |
168 | if (flags & EAF_NO_INDIRECT_READ) | |
169 | fprintf (out, " no_indirect_read"); | |
85ebbabd JH |
170 | if (newline) |
171 | fprintf (out, "\n"); | |
172 | } | |
173 | ||
174 | struct escape_summary | |
175 | { | |
176 | auto_vec <escape_entry> esc; | |
177 | void dump (FILE *out) | |
178 | { | |
179 | for (unsigned int i = 0; i < esc.length (); i++) | |
180 | { | |
181 | fprintf (out, " parm %i arg %i %s min:", | |
182 | esc[i].parm_index, | |
183 | esc[i].arg, | |
184 | esc[i].direct ? "(direct)" : "(indirect)"); | |
185 | dump_eaf_flags (out, esc[i].min_flags, false); | |
186 | } | |
187 | fprintf (out, "\n"); | |
188 | } | |
189 | }; | |
190 | ||
191 | class escape_summaries_t : public call_summary <escape_summary *> | |
192 | { | |
193 | public: | |
194 | escape_summaries_t (symbol_table *symtab) | |
195 | : call_summary <escape_summary *> (symtab) {} | |
196 | /* Hook that is called by summary when an edge is duplicated. */ | |
f31ba116 DM |
197 | void duplicate (cgraph_edge *, |
198 | cgraph_edge *, | |
199 | escape_summary *src, | |
200 | escape_summary *dst) final override | |
85ebbabd JH |
201 | { |
202 | dst->esc = src->esc.copy (); | |
203 | } | |
204 | }; | |
205 | ||
206 | static escape_summaries_t *escape_summaries = NULL; | |
207 | ||
208 | } /* ANON namespace: GTY annotated summaries can not be anonymous. */ | |
209 | ||
210 | ||
d119f34c JH |
211 | /* Class (from which there is one global instance) that holds modref summaries |
212 | for all analyzed functions. */ | |
6cef01c3 | 213 | |
d119f34c JH |
214 | class GTY((user)) modref_summaries |
215 | : public fast_function_summary <modref_summary *, va_gc> | |
216 | { | |
217 | public: | |
218 | modref_summaries (symbol_table *symtab) | |
219 | : fast_function_summary <modref_summary *, va_gc> (symtab) {} | |
f31ba116 DM |
220 | void insert (cgraph_node *, modref_summary *state) final override; |
221 | void duplicate (cgraph_node *src_node, | |
222 | cgraph_node *dst_node, | |
223 | modref_summary *src_data, | |
224 | modref_summary *dst_data) final override; | |
c9da53d6 JH |
225 | static modref_summaries *create_ggc (symbol_table *symtab) |
226 | { | |
227 | return new (ggc_alloc_no_dtor<modref_summaries> ()) | |
228 | modref_summaries (symtab); | |
229 | } | |
d119f34c JH |
230 | }; |
231 | ||
71dbabcc JH |
232 | class modref_summary_lto; |
233 | ||
234 | /* Class (from which there is one global instance) that holds modref summaries | |
235 | for all analyzed functions. */ | |
6cef01c3 | 236 | |
71dbabcc JH |
237 | class GTY((user)) modref_summaries_lto |
238 | : public fast_function_summary <modref_summary_lto *, va_gc> | |
239 | { | |
240 | public: | |
241 | modref_summaries_lto (symbol_table *symtab) | |
242 | : fast_function_summary <modref_summary_lto *, va_gc> (symtab), | |
243 | propagated (false) {} | |
f31ba116 DM |
244 | void insert (cgraph_node *, modref_summary_lto *state) final override; |
245 | void duplicate (cgraph_node *src_node, | |
246 | cgraph_node *dst_node, | |
247 | modref_summary_lto *src_data, | |
248 | modref_summary_lto *dst_data) final override; | |
71dbabcc JH |
249 | static modref_summaries_lto *create_ggc (symbol_table *symtab) |
250 | { | |
251 | return new (ggc_alloc_no_dtor<modref_summaries_lto> ()) | |
252 | modref_summaries_lto (symtab); | |
253 | } | |
254 | bool propagated; | |
255 | }; | |
256 | ||
257 | /* Global variable holding all modref summaries | |
258 | (from analysis to IPA propagation time). */ | |
6cef01c3 | 259 | |
71dbabcc JH |
260 | static GTY(()) fast_function_summary <modref_summary *, va_gc> |
261 | *summaries; | |
262 | ||
8a2fd716 | 263 | /* Global variable holding all modref optimization summaries |
71dbabcc | 264 | (from IPA propagation time or used by local optimization pass). */ |
6cef01c3 | 265 | |
71dbabcc JH |
266 | static GTY(()) fast_function_summary <modref_summary *, va_gc> |
267 | *optimization_summaries; | |
268 | ||
269 | /* LTO summaries hold info from analysis to LTO streaming or from LTO | |
270 | stream-in through propagation to LTO stream-out. */ | |
6cef01c3 | 271 | |
71dbabcc JH |
272 | static GTY(()) fast_function_summary <modref_summary_lto *, va_gc> |
273 | *summaries_lto; | |
d119f34c JH |
274 | |
275 | /* Summary for a single function which this pass produces. */ | |
276 | ||
277 | modref_summary::modref_summary () | |
a70c0512 | 278 | : loads (NULL), stores (NULL), retslot_flags (0), static_chain_flags (0), |
a34edf9a JH |
279 | writes_errno (false), side_effects (false), nondeterministic (false), |
280 | calls_interposable (false), global_memory_read (false), | |
5aa91072 | 281 | global_memory_written (false), try_dse (false) |
d119f34c JH |
282 | { |
283 | } | |
284 | ||
285 | modref_summary::~modref_summary () | |
286 | { | |
287 | if (loads) | |
288 | ggc_delete (loads); | |
289 | if (stores) | |
290 | ggc_delete (stores); | |
d119f34c JH |
291 | } |
292 | ||
4341b1b1 JH |
293 | /* Remove all flags from EAF_FLAGS that are implied by ECF_FLAGS and not |
294 | useful to track. If returns_void is true moreover clear | |
295 | EAF_NOT_RETURNED. */ | |
296 | static int | |
297 | remove_useless_eaf_flags (int eaf_flags, int ecf_flags, bool returns_void) | |
298 | { | |
f6f704fd | 299 | if (ecf_flags & (ECF_CONST | ECF_NOVOPS)) |
4341b1b1 JH |
300 | eaf_flags &= ~implicit_const_eaf_flags; |
301 | else if (ecf_flags & ECF_PURE) | |
302 | eaf_flags &= ~implicit_pure_eaf_flags; | |
303 | else if ((ecf_flags & ECF_NORETURN) || returns_void) | |
d70ef656 | 304 | eaf_flags &= ~(EAF_NOT_RETURNED_DIRECTLY | EAF_NOT_RETURNED_INDIRECTLY); |
4341b1b1 JH |
305 | return eaf_flags; |
306 | } | |
307 | ||
85ebbabd JH |
308 | /* Return true if FLAGS holds some useful information. */ |
309 | ||
310 | static bool | |
8da8ed43 | 311 | eaf_flags_useful_p (vec <eaf_flags_t> &flags, int ecf_flags) |
85ebbabd JH |
312 | { |
313 | for (unsigned i = 0; i < flags.length (); i++) | |
4341b1b1 JH |
314 | if (remove_useless_eaf_flags (flags[i], ecf_flags, false)) |
315 | return true; | |
85ebbabd JH |
316 | return false; |
317 | } | |
318 | ||
319 | /* Return true if summary is potentially useful for optimization. | |
320 | If CHECK_FLAGS is false assume that arg_flags are useful. */ | |
67c935c8 JH |
321 | |
322 | bool | |
85ebbabd | 323 | modref_summary::useful_p (int ecf_flags, bool check_flags) |
67c935c8 | 324 | { |
85ebbabd | 325 | if (arg_flags.length () && !check_flags) |
520d5ad3 | 326 | return true; |
85ebbabd JH |
327 | if (check_flags && eaf_flags_useful_p (arg_flags, ecf_flags)) |
328 | return true; | |
329 | arg_flags.release (); | |
b8ef019a JH |
330 | if (check_flags && remove_useless_eaf_flags (retslot_flags, ecf_flags, false)) |
331 | return true; | |
a70c0512 JH |
332 | if (check_flags |
333 | && remove_useless_eaf_flags (static_chain_flags, ecf_flags, false)) | |
334 | return true; | |
f6f704fd | 335 | if (ecf_flags & (ECF_CONST | ECF_NOVOPS)) |
a34edf9a JH |
336 | return ((!side_effects || !nondeterministic) |
337 | && (ecf_flags & ECF_LOOPING_CONST_OR_PURE)); | |
71dbabcc | 338 | if (loads && !loads->every_base) |
67c935c8 | 339 | return true; |
64f3e71c JH |
340 | else |
341 | kills.release (); | |
67c935c8 | 342 | if (ecf_flags & ECF_PURE) |
a34edf9a JH |
343 | return ((!side_effects || !nondeterministic) |
344 | && (ecf_flags & ECF_LOOPING_CONST_OR_PURE)); | |
71dbabcc | 345 | return stores && !stores->every_base; |
67c935c8 JH |
346 | } |
347 | ||
71dbabcc JH |
348 | /* Single function summary used for LTO. */ |
349 | ||
350 | typedef modref_tree <tree> modref_records_lto; | |
351 | struct GTY(()) modref_summary_lto | |
352 | { | |
353 | /* Load and stores in functions using types rather then alias sets. | |
354 | ||
355 | This is necessary to make the information streamable for LTO but is also | |
356 | more verbose and thus more likely to hit the limits. */ | |
357 | modref_records_lto *loads; | |
358 | modref_records_lto *stores; | |
64f3e71c | 359 | auto_vec<modref_access_node> GTY((skip)) kills; |
8da8ed43 | 360 | auto_vec<eaf_flags_t> GTY((skip)) arg_flags; |
b8ef019a | 361 | eaf_flags_t retslot_flags; |
a70c0512 | 362 | eaf_flags_t static_chain_flags; |
a34edf9a JH |
363 | unsigned writes_errno : 1; |
364 | unsigned side_effects : 1; | |
365 | unsigned nondeterministic : 1; | |
366 | unsigned calls_interposable : 1; | |
71dbabcc JH |
367 | |
368 | modref_summary_lto (); | |
369 | ~modref_summary_lto (); | |
370 | void dump (FILE *); | |
85ebbabd | 371 | bool useful_p (int ecf_flags, bool check_flags = true); |
71dbabcc JH |
372 | }; |
373 | ||
374 | /* Summary for a single function which this pass produces. */ | |
375 | ||
376 | modref_summary_lto::modref_summary_lto () | |
a70c0512 | 377 | : loads (NULL), stores (NULL), retslot_flags (0), static_chain_flags (0), |
a34edf9a JH |
378 | writes_errno (false), side_effects (false), nondeterministic (false), |
379 | calls_interposable (false) | |
71dbabcc JH |
380 | { |
381 | } | |
382 | ||
383 | modref_summary_lto::~modref_summary_lto () | |
384 | { | |
385 | if (loads) | |
386 | ggc_delete (loads); | |
387 | if (stores) | |
388 | ggc_delete (stores); | |
389 | } | |
390 | ||
391 | ||
85ebbabd JH |
392 | /* Return true if lto summary is potentially useful for optimization. |
393 | If CHECK_FLAGS is false assume that arg_flags are useful. */ | |
67c935c8 JH |
394 | |
395 | bool | |
85ebbabd | 396 | modref_summary_lto::useful_p (int ecf_flags, bool check_flags) |
67c935c8 | 397 | { |
85ebbabd JH |
398 | if (arg_flags.length () && !check_flags) |
399 | return true; | |
400 | if (check_flags && eaf_flags_useful_p (arg_flags, ecf_flags)) | |
401 | return true; | |
402 | arg_flags.release (); | |
b8ef019a JH |
403 | if (check_flags && remove_useless_eaf_flags (retslot_flags, ecf_flags, false)) |
404 | return true; | |
a70c0512 JH |
405 | if (check_flags |
406 | && remove_useless_eaf_flags (static_chain_flags, ecf_flags, false)) | |
407 | return true; | |
f6f704fd | 408 | if (ecf_flags & (ECF_CONST | ECF_NOVOPS)) |
a34edf9a JH |
409 | return ((!side_effects || !nondeterministic) |
410 | && (ecf_flags & ECF_LOOPING_CONST_OR_PURE)); | |
67c935c8 JH |
411 | if (loads && !loads->every_base) |
412 | return true; | |
74509b96 JH |
413 | else |
414 | kills.release (); | |
67c935c8 | 415 | if (ecf_flags & ECF_PURE) |
a34edf9a JH |
416 | return ((!side_effects || !nondeterministic) |
417 | && (ecf_flags & ECF_LOOPING_CONST_OR_PURE)); | |
e24817aa | 418 | return stores && !stores->every_base; |
67c935c8 JH |
419 | } |
420 | ||
d119f34c JH |
421 | /* Dump records TT to OUT. */ |
422 | ||
423 | static void | |
424 | dump_records (modref_records *tt, FILE *out) | |
425 | { | |
d119f34c JH |
426 | if (tt->every_base) |
427 | { | |
428 | fprintf (out, " Every base\n"); | |
429 | return; | |
430 | } | |
431 | size_t i; | |
432 | modref_base_node <alias_set_type> *n; | |
433 | FOR_EACH_VEC_SAFE_ELT (tt->bases, i, n) | |
434 | { | |
435 | fprintf (out, " Base %i: alias set %i\n", (int)i, n->base); | |
436 | if (n->every_ref) | |
437 | { | |
438 | fprintf (out, " Every ref\n"); | |
439 | continue; | |
440 | } | |
441 | size_t j; | |
442 | modref_ref_node <alias_set_type> *r; | |
443 | FOR_EACH_VEC_SAFE_ELT (n->refs, j, r) | |
444 | { | |
445 | fprintf (out, " Ref %i: alias set %i\n", (int)j, r->ref); | |
c33f4742 JH |
446 | if (r->every_access) |
447 | { | |
ada353b8 | 448 | fprintf (out, " Every access\n"); |
c33f4742 JH |
449 | continue; |
450 | } | |
451 | size_t k; | |
452 | modref_access_node *a; | |
453 | FOR_EACH_VEC_SAFE_ELT (r->accesses, k, a) | |
e30bf330 JH |
454 | { |
455 | fprintf (out, " access:"); | |
456 | a->dump (out); | |
457 | } | |
d119f34c JH |
458 | } |
459 | } | |
460 | } | |
461 | ||
462 | /* Dump records TT to OUT. */ | |
463 | ||
464 | static void | |
465 | dump_lto_records (modref_records_lto *tt, FILE *out) | |
466 | { | |
d119f34c JH |
467 | if (tt->every_base) |
468 | { | |
469 | fprintf (out, " Every base\n"); | |
470 | return; | |
471 | } | |
472 | size_t i; | |
473 | modref_base_node <tree> *n; | |
474 | FOR_EACH_VEC_SAFE_ELT (tt->bases, i, n) | |
475 | { | |
476 | fprintf (out, " Base %i:", (int)i); | |
477 | print_generic_expr (dump_file, n->base); | |
478 | fprintf (out, " (alias set %i)\n", | |
9044db88 | 479 | n->base ? get_alias_set (n->base) : 0); |
d119f34c JH |
480 | if (n->every_ref) |
481 | { | |
482 | fprintf (out, " Every ref\n"); | |
483 | continue; | |
484 | } | |
485 | size_t j; | |
486 | modref_ref_node <tree> *r; | |
487 | FOR_EACH_VEC_SAFE_ELT (n->refs, j, r) | |
488 | { | |
489 | fprintf (out, " Ref %i:", (int)j); | |
490 | print_generic_expr (dump_file, r->ref); | |
491 | fprintf (out, " (alias set %i)\n", | |
9044db88 | 492 | r->ref ? get_alias_set (r->ref) : 0); |
c33f4742 JH |
493 | if (r->every_access) |
494 | { | |
56cb815b | 495 | fprintf (out, " Every access\n"); |
c33f4742 JH |
496 | continue; |
497 | } | |
498 | size_t k; | |
499 | modref_access_node *a; | |
500 | FOR_EACH_VEC_SAFE_ELT (r->accesses, k, a) | |
e30bf330 JH |
501 | { |
502 | fprintf (out, " access:"); | |
503 | a->dump (out); | |
504 | } | |
d119f34c JH |
505 | } |
506 | } | |
507 | } | |
508 | ||
85ebbabd | 509 | /* Dump all escape points of NODE to OUT. */ |
520d5ad3 JH |
510 | |
511 | static void | |
85ebbabd | 512 | dump_modref_edge_summaries (FILE *out, cgraph_node *node, int depth) |
520d5ad3 | 513 | { |
85ebbabd JH |
514 | int i = 0; |
515 | if (!escape_summaries) | |
516 | return; | |
517 | for (cgraph_edge *e = node->indirect_calls; e; e = e->next_callee) | |
518 | { | |
519 | class escape_summary *sum = escape_summaries->get (e); | |
520 | if (sum) | |
521 | { | |
522 | fprintf (out, "%*sIndirect call %i in %s escapes:", | |
523 | depth, "", i, node->dump_name ()); | |
524 | sum->dump (out); | |
525 | } | |
526 | i++; | |
527 | } | |
528 | for (cgraph_edge *e = node->callees; e; e = e->next_callee) | |
529 | { | |
530 | if (!e->inline_failed) | |
531 | dump_modref_edge_summaries (out, e->callee, depth + 1); | |
532 | class escape_summary *sum = escape_summaries->get (e); | |
533 | if (sum) | |
534 | { | |
535 | fprintf (out, "%*sCall %s->%s escapes:", depth, "", | |
536 | node->dump_name (), e->callee->dump_name ()); | |
537 | sum->dump (out); | |
538 | } | |
539 | class fnspec_summary *fsum = fnspec_summaries->get (e); | |
540 | if (fsum) | |
541 | { | |
542 | fprintf (out, "%*sCall %s->%s fnspec: %s\n", depth, "", | |
543 | node->dump_name (), e->callee->dump_name (), | |
544 | fsum->fnspec); | |
545 | } | |
546 | } | |
547 | } | |
548 | ||
549 | /* Remove all call edge summaries associated with NODE. */ | |
550 | ||
551 | static void | |
552 | remove_modref_edge_summaries (cgraph_node *node) | |
553 | { | |
554 | if (!escape_summaries) | |
555 | return; | |
556 | for (cgraph_edge *e = node->indirect_calls; e; e = e->next_callee) | |
557 | escape_summaries->remove (e); | |
558 | for (cgraph_edge *e = node->callees; e; e = e->next_callee) | |
559 | { | |
560 | if (!e->inline_failed) | |
561 | remove_modref_edge_summaries (e->callee); | |
562 | escape_summaries->remove (e); | |
563 | fnspec_summaries->remove (e); | |
564 | } | |
520d5ad3 JH |
565 | } |
566 | ||
d119f34c JH |
567 | /* Dump summary. */ |
568 | ||
569 | void | |
570 | modref_summary::dump (FILE *out) | |
571 | { | |
6cef01c3 JH |
572 | if (loads) |
573 | { | |
574 | fprintf (out, " loads:\n"); | |
575 | dump_records (loads, out); | |
576 | } | |
577 | if (stores) | |
578 | { | |
579 | fprintf (out, " stores:\n"); | |
580 | dump_records (stores, out); | |
581 | } | |
64f3e71c JH |
582 | if (kills.length ()) |
583 | { | |
584 | fprintf (out, " kills:\n"); | |
585 | for (auto kill : kills) | |
586 | { | |
587 | fprintf (out, " "); | |
588 | kill.dump (out); | |
589 | } | |
590 | } | |
617695cd JH |
591 | if (writes_errno) |
592 | fprintf (out, " Writes errno\n"); | |
992644c3 JH |
593 | if (side_effects) |
594 | fprintf (out, " Side effects\n"); | |
a34edf9a JH |
595 | if (nondeterministic) |
596 | fprintf (out, " Nondeterministic\n"); | |
597 | if (calls_interposable) | |
598 | fprintf (out, " Calls interposable\n"); | |
e0040bc3 JH |
599 | if (global_memory_read) |
600 | fprintf (out, " Global memory read\n"); | |
601 | if (global_memory_written) | |
602 | fprintf (out, " Global memory written\n"); | |
5aa91072 JH |
603 | if (try_dse) |
604 | fprintf (out, " Try dse\n"); | |
520d5ad3 JH |
605 | if (arg_flags.length ()) |
606 | { | |
607 | for (unsigned int i = 0; i < arg_flags.length (); i++) | |
608 | if (arg_flags[i]) | |
609 | { | |
610 | fprintf (out, " parm %i flags:", i); | |
611 | dump_eaf_flags (out, arg_flags[i]); | |
612 | } | |
613 | } | |
b8ef019a JH |
614 | if (retslot_flags) |
615 | { | |
616 | fprintf (out, " Retslot flags:"); | |
617 | dump_eaf_flags (out, retslot_flags); | |
618 | } | |
a70c0512 JH |
619 | if (static_chain_flags) |
620 | { | |
621 | fprintf (out, " Static chain flags:"); | |
622 | dump_eaf_flags (out, static_chain_flags); | |
623 | } | |
71dbabcc JH |
624 | } |
625 | ||
626 | /* Dump summary. */ | |
627 | ||
628 | void | |
629 | modref_summary_lto::dump (FILE *out) | |
630 | { | |
56cb815b JH |
631 | fprintf (out, " loads:\n"); |
632 | dump_lto_records (loads, out); | |
633 | fprintf (out, " stores:\n"); | |
634 | dump_lto_records (stores, out); | |
74509b96 JH |
635 | if (kills.length ()) |
636 | { | |
637 | fprintf (out, " kills:\n"); | |
638 | for (auto kill : kills) | |
639 | { | |
640 | fprintf (out, " "); | |
641 | kill.dump (out); | |
642 | } | |
643 | } | |
6cef01c3 JH |
644 | if (writes_errno) |
645 | fprintf (out, " Writes errno\n"); | |
992644c3 JH |
646 | if (side_effects) |
647 | fprintf (out, " Side effects\n"); | |
a34edf9a JH |
648 | if (nondeterministic) |
649 | fprintf (out, " Nondeterministic\n"); | |
650 | if (calls_interposable) | |
651 | fprintf (out, " Calls interposable\n"); | |
85ebbabd JH |
652 | if (arg_flags.length ()) |
653 | { | |
654 | for (unsigned int i = 0; i < arg_flags.length (); i++) | |
655 | if (arg_flags[i]) | |
656 | { | |
657 | fprintf (out, " parm %i flags:", i); | |
658 | dump_eaf_flags (out, arg_flags[i]); | |
659 | } | |
660 | } | |
b8ef019a JH |
661 | if (retslot_flags) |
662 | { | |
663 | fprintf (out, " Retslot flags:"); | |
664 | dump_eaf_flags (out, retslot_flags); | |
665 | } | |
a70c0512 JH |
666 | if (static_chain_flags) |
667 | { | |
668 | fprintf (out, " Static chain flags:"); | |
669 | dump_eaf_flags (out, static_chain_flags); | |
670 | } | |
d119f34c JH |
671 | } |
672 | ||
e0040bc3 | 673 | /* Called after summary is produced and before it is used by local analysis. |
5aa91072 JH |
674 | Can be called multiple times in case summary needs to update signature. |
675 | FUN is decl of function summary is attached to. */ | |
e0040bc3 | 676 | void |
5aa91072 | 677 | modref_summary::finalize (tree fun) |
e0040bc3 JH |
678 | { |
679 | global_memory_read = !loads || loads->global_access_p (); | |
680 | global_memory_written = !stores || stores->global_access_p (); | |
5aa91072 JH |
681 | |
682 | /* We can do DSE if we know function has no side effects and | |
02c80893 | 683 | we can analyze all stores. Disable dse if there are too many |
5aa91072 JH |
684 | stores to try. */ |
685 | if (side_effects || global_memory_written || writes_errno) | |
686 | try_dse = false; | |
687 | else | |
688 | { | |
689 | try_dse = true; | |
690 | size_t i, j, k; | |
691 | int num_tests = 0, max_tests | |
8632f8c6 | 692 | = opt_for_fn (fun, param_modref_max_tests); |
5aa91072 JH |
693 | modref_base_node <alias_set_type> *base_node; |
694 | modref_ref_node <alias_set_type> *ref_node; | |
695 | modref_access_node *access_node; | |
696 | FOR_EACH_VEC_SAFE_ELT (stores->bases, i, base_node) | |
697 | { | |
698 | if (base_node->every_ref) | |
699 | { | |
700 | try_dse = false; | |
701 | break; | |
702 | } | |
703 | FOR_EACH_VEC_SAFE_ELT (base_node->refs, j, ref_node) | |
704 | { | |
705 | if (base_node->every_ref) | |
706 | { | |
707 | try_dse = false; | |
708 | break; | |
709 | } | |
710 | FOR_EACH_VEC_SAFE_ELT (ref_node->accesses, k, access_node) | |
711 | if (num_tests++ > max_tests | |
712 | || !access_node->parm_offset_known) | |
713 | { | |
714 | try_dse = false; | |
715 | break; | |
716 | } | |
717 | if (!try_dse) | |
718 | break; | |
719 | } | |
720 | if (!try_dse) | |
721 | break; | |
722 | } | |
723 | } | |
6180f5c8 RB |
724 | if (loads->every_base) |
725 | load_accesses = 1; | |
726 | else | |
727 | { | |
728 | load_accesses = 0; | |
729 | for (auto base_node : loads->bases) | |
730 | { | |
731 | if (base_node->every_ref) | |
732 | load_accesses++; | |
733 | else | |
734 | for (auto ref_node : base_node->refs) | |
735 | if (ref_node->every_access) | |
736 | load_accesses++; | |
737 | else | |
738 | load_accesses += ref_node->accesses->length (); | |
739 | } | |
740 | } | |
e0040bc3 JH |
741 | } |
742 | ||
d119f34c JH |
743 | /* Get function summary for FUNC if it exists, return NULL otherwise. */ |
744 | ||
745 | modref_summary * | |
746 | get_modref_function_summary (cgraph_node *func) | |
747 | { | |
748 | /* Avoid creation of the summary too early (e.g. when front-end calls us). */ | |
71dbabcc | 749 | if (!optimization_summaries) |
d119f34c JH |
750 | return NULL; |
751 | ||
752 | /* A single function body may be represented by multiple symbols with | |
753 | different visibility. For example, if FUNC is an interposable alias, | |
754 | we don't want to return anything, even if we have summary for the target | |
755 | function. */ | |
756 | enum availability avail; | |
c87ff875 | 757 | func = func->ultimate_alias_target |
520d5ad3 JH |
758 | (&avail, current_function_decl ? |
759 | cgraph_node::get (current_function_decl) : NULL); | |
d119f34c JH |
760 | if (avail <= AVAIL_INTERPOSABLE) |
761 | return NULL; | |
762 | ||
71dbabcc JH |
763 | modref_summary *r = optimization_summaries->get (func); |
764 | return r; | |
d119f34c JH |
765 | } |
766 | ||
6dc90c4d JH |
767 | /* Get function summary for CALL if it exists, return NULL otherwise. |
768 | If non-null set interposed to indicate whether function may not | |
769 | bind to current def. In this case sometimes loads from function | |
770 | needs to be ignored. */ | |
771 | ||
772 | modref_summary * | |
773 | get_modref_function_summary (gcall *call, bool *interposed) | |
774 | { | |
775 | tree callee = gimple_call_fndecl (call); | |
776 | if (!callee) | |
777 | return NULL; | |
778 | struct cgraph_node *node = cgraph_node::get (callee); | |
779 | if (!node) | |
780 | return NULL; | |
781 | modref_summary *r = get_modref_function_summary (node); | |
782 | if (interposed && r) | |
783 | *interposed = r->calls_interposable | |
8632f8c6 | 784 | || !node->binds_to_current_def_p (); |
6dc90c4d JH |
785 | return r; |
786 | } | |
787 | ||
788 | ||
18f0873d JH |
789 | namespace { |
790 | ||
02c80893 | 791 | /* Return true if ECF flags says that nondeterminism can be ignored. */ |
09a4ffb7 JH |
792 | |
793 | static bool | |
794 | ignore_nondeterminism_p (tree caller, int flags) | |
795 | { | |
796 | if (flags & (ECF_CONST | ECF_PURE)) | |
797 | return true; | |
798 | if ((flags & (ECF_NORETURN | ECF_NOTHROW)) == (ECF_NORETURN | ECF_NOTHROW) | |
799 | || (!opt_for_fn (caller, flag_exceptions) && (flags & ECF_NORETURN))) | |
800 | return true; | |
801 | return false; | |
802 | } | |
803 | ||
804 | /* Return true if ECF flags says that return value can be ignored. */ | |
805 | ||
806 | static bool | |
807 | ignore_retval_p (tree caller, int flags) | |
808 | { | |
809 | if ((flags & (ECF_NORETURN | ECF_NOTHROW)) == (ECF_NORETURN | ECF_NOTHROW) | |
810 | || (!opt_for_fn (caller, flag_exceptions) && (flags & ECF_NORETURN))) | |
811 | return true; | |
812 | return false; | |
813 | } | |
814 | ||
815 | /* Return true if ECF flags says that stores can be ignored. */ | |
816 | ||
817 | static bool | |
818 | ignore_stores_p (tree caller, int flags) | |
819 | { | |
820 | if (flags & (ECF_PURE | ECF_CONST | ECF_NOVOPS)) | |
821 | return true; | |
822 | if ((flags & (ECF_NORETURN | ECF_NOTHROW)) == (ECF_NORETURN | ECF_NOTHROW) | |
823 | || (!opt_for_fn (caller, flag_exceptions) && (flags & ECF_NORETURN))) | |
824 | return true; | |
825 | return false; | |
826 | } | |
827 | ||
0f5afb62 | 828 | /* Determine parm_map for PTR which is supposed to be a pointer. */ |
09a4ffb7 JH |
829 | |
830 | modref_parm_map | |
0f5afb62 | 831 | parm_map_for_ptr (tree op) |
09a4ffb7 JH |
832 | { |
833 | bool offset_known; | |
834 | poly_int64 offset; | |
835 | struct modref_parm_map parm_map; | |
0f5afb62 | 836 | gcall *call; |
09a4ffb7 JH |
837 | |
838 | parm_map.parm_offset_known = false; | |
839 | parm_map.parm_offset = 0; | |
840 | ||
841 | offset_known = unadjusted_ptr_and_unit_offset (op, &op, &offset); | |
842 | if (TREE_CODE (op) == SSA_NAME | |
843 | && SSA_NAME_IS_DEFAULT_DEF (op) | |
844 | && TREE_CODE (SSA_NAME_VAR (op)) == PARM_DECL) | |
845 | { | |
846 | int index = 0; | |
0f5afb62 JH |
847 | |
848 | if (cfun->static_chain_decl | |
849 | && op == ssa_default_def (cfun, cfun->static_chain_decl)) | |
850 | index = MODREF_STATIC_CHAIN_PARM; | |
851 | else | |
852 | for (tree t = DECL_ARGUMENTS (current_function_decl); | |
853 | t != SSA_NAME_VAR (op); t = DECL_CHAIN (t)) | |
09a4ffb7 | 854 | index++; |
09a4ffb7 JH |
855 | parm_map.parm_index = index; |
856 | parm_map.parm_offset_known = offset_known; | |
857 | parm_map.parm_offset = offset; | |
858 | } | |
859 | else if (points_to_local_or_readonly_memory_p (op)) | |
860 | parm_map.parm_index = MODREF_LOCAL_MEMORY_PARM; | |
0f5afb62 JH |
861 | /* Memory allocated in the function is not visible to caller before the |
862 | call and thus we do not need to record it as load/stores/kills. */ | |
863 | else if (TREE_CODE (op) == SSA_NAME | |
864 | && (call = dyn_cast<gcall *>(SSA_NAME_DEF_STMT (op))) != NULL | |
865 | && gimple_call_flags (call) & ECF_MALLOC) | |
866 | parm_map.parm_index = MODREF_LOCAL_MEMORY_PARM; | |
09a4ffb7 JH |
867 | else |
868 | parm_map.parm_index = MODREF_UNKNOWN_PARM; | |
869 | return parm_map; | |
870 | } | |
871 | ||
3305135c JH |
872 | /* Return true if ARG with EAF flags FLAGS can not make any caller's parameter |
873 | used (if LOAD is true we check loads, otherwise stores). */ | |
874 | ||
875 | static bool | |
876 | verify_arg (tree arg, int flags, bool load) | |
877 | { | |
878 | if (flags & EAF_UNUSED) | |
879 | return true; | |
880 | if (load && (flags & EAF_NO_DIRECT_READ)) | |
881 | return true; | |
882 | if (!load | |
883 | && (flags & (EAF_NO_DIRECT_CLOBBER | EAF_NO_INDIRECT_CLOBBER)) | |
884 | == (EAF_NO_DIRECT_CLOBBER | EAF_NO_INDIRECT_CLOBBER)) | |
885 | return true; | |
886 | if (is_gimple_constant (arg)) | |
887 | return true; | |
888 | if (DECL_P (arg) && TREE_READONLY (arg)) | |
889 | return true; | |
890 | if (TREE_CODE (arg) == ADDR_EXPR) | |
891 | { | |
892 | tree t = get_base_address (TREE_OPERAND (arg, 0)); | |
893 | if (is_gimple_constant (t)) | |
894 | return true; | |
895 | if (DECL_P (t) | |
896 | && (TREE_READONLY (t) || TREE_CODE (t) == FUNCTION_DECL)) | |
897 | return true; | |
898 | } | |
899 | return false; | |
900 | } | |
901 | ||
902 | /* Return true if STMT may access memory that is pointed to by parameters | |
903 | of caller and which is not seen as an escape by PTA. | |
904 | CALLEE_ECF_FLAGS are ECF flags of callee. If LOAD is true then by access | |
905 | we mean load, otherwise we mean store. */ | |
906 | ||
907 | static bool | |
908 | may_access_nonescaping_parm_p (gcall *call, int callee_ecf_flags, bool load) | |
909 | { | |
910 | int implicit_flags = 0; | |
911 | ||
912 | if (ignore_stores_p (current_function_decl, callee_ecf_flags)) | |
913 | implicit_flags |= ignore_stores_eaf_flags; | |
914 | if (callee_ecf_flags & ECF_PURE) | |
915 | implicit_flags |= implicit_pure_eaf_flags; | |
916 | if (callee_ecf_flags & (ECF_CONST | ECF_NOVOPS)) | |
917 | implicit_flags |= implicit_const_eaf_flags; | |
918 | if (gimple_call_chain (call) | |
919 | && !verify_arg (gimple_call_chain (call), | |
920 | gimple_call_static_chain_flags (call) | implicit_flags, | |
921 | load)) | |
922 | return true; | |
923 | for (unsigned int i = 0; i < gimple_call_num_args (call); i++) | |
924 | if (!verify_arg (gimple_call_arg (call, i), | |
925 | gimple_call_arg_flags (call, i) | implicit_flags, | |
926 | load)) | |
927 | return true; | |
928 | return false; | |
929 | } | |
930 | ||
931 | ||
09a4ffb7 JH |
932 | /* Analyze memory accesses (loads, stores and kills) performed |
933 | by the function. Set also side_effects, calls_interposable | |
934 | and nondeterminism flags. */ | |
935 | ||
936 | class modref_access_analysis | |
937 | { | |
938 | public: | |
939 | modref_access_analysis (bool ipa, modref_summary *summary, | |
940 | modref_summary_lto *summary_lto) | |
941 | : m_summary (summary), m_summary_lto (summary_lto), m_ipa (ipa) | |
942 | { | |
943 | } | |
944 | void analyze (); | |
945 | private: | |
946 | bool set_side_effects (); | |
947 | bool set_nondeterministic (); | |
948 | static modref_access_node get_access (ao_ref *ref); | |
949 | static void record_access (modref_records *, ao_ref *, modref_access_node &); | |
950 | static void record_access_lto (modref_records_lto *, ao_ref *, | |
951 | modref_access_node &a); | |
952 | bool record_access_p (tree); | |
953 | bool record_unknown_load (); | |
954 | bool record_unknown_store (); | |
3305135c JH |
955 | bool record_global_memory_load (); |
956 | bool record_global_memory_store (); | |
09a4ffb7 JH |
957 | bool merge_call_side_effects (gimple *, modref_summary *, |
958 | cgraph_node *, bool); | |
959 | modref_access_node get_access_for_fnspec (gcall *, attr_fnspec &, | |
960 | unsigned int, modref_parm_map &); | |
961 | void process_fnspec (gcall *); | |
962 | void analyze_call (gcall *); | |
963 | static bool analyze_load (gimple *, tree, tree, void *); | |
964 | static bool analyze_store (gimple *, tree, tree, void *); | |
965 | void analyze_stmt (gimple *, bool); | |
966 | void propagate (); | |
967 | ||
968 | /* Summary being computed. | |
02c80893 | 969 | We work either with m_summary or m_summary_lto. Never on both. */ |
09a4ffb7 JH |
970 | modref_summary *m_summary; |
971 | modref_summary_lto *m_summary_lto; | |
02c80893 | 972 | /* Recursive calls needs simplistic dataflow after analysis finished. |
09a4ffb7 JH |
973 | Collect all calls into this vector during analysis and later process |
974 | them in propagate. */ | |
975 | auto_vec <gimple *, 32> m_recursive_calls; | |
02c80893 | 976 | /* ECF flags of function being analyzed. */ |
09a4ffb7 JH |
977 | int m_ecf_flags; |
978 | /* True if IPA propagation will be done later. */ | |
979 | bool m_ipa; | |
02c80893 | 980 | /* Set true if statement currently analyze is known to be |
09a4ffb7 JH |
981 | executed each time function is called. */ |
982 | bool m_always_executed; | |
983 | }; | |
984 | ||
02c80893 | 985 | /* Set side_effects flag and return if something changed. */ |
09a4ffb7 JH |
986 | |
987 | bool | |
988 | modref_access_analysis::set_side_effects () | |
989 | { | |
990 | bool changed = false; | |
991 | ||
992 | if (m_summary && !m_summary->side_effects) | |
993 | { | |
994 | m_summary->side_effects = true; | |
995 | changed = true; | |
996 | } | |
997 | if (m_summary_lto && !m_summary_lto->side_effects) | |
998 | { | |
999 | m_summary_lto->side_effects = true; | |
1000 | changed = true; | |
1001 | } | |
1002 | return changed; | |
1003 | } | |
1004 | ||
02c80893 | 1005 | /* Set nondeterministic flag and return if something changed. */ |
09a4ffb7 JH |
1006 | |
1007 | bool | |
1008 | modref_access_analysis::set_nondeterministic () | |
1009 | { | |
1010 | bool changed = false; | |
1011 | ||
1012 | if (m_summary && !m_summary->nondeterministic) | |
1013 | { | |
1014 | m_summary->side_effects = m_summary->nondeterministic = true; | |
1015 | changed = true; | |
1016 | } | |
1017 | if (m_summary_lto && !m_summary_lto->nondeterministic) | |
1018 | { | |
1019 | m_summary_lto->side_effects = m_summary_lto->nondeterministic = true; | |
1020 | changed = true; | |
1021 | } | |
1022 | return changed; | |
1023 | } | |
1024 | ||
c33f4742 | 1025 | /* Construct modref_access_node from REF. */ |
09a4ffb7 JH |
1026 | |
1027 | modref_access_node | |
1028 | modref_access_analysis::get_access (ao_ref *ref) | |
c33f4742 | 1029 | { |
c33f4742 JH |
1030 | tree base; |
1031 | ||
c34db4b6 JH |
1032 | base = ao_ref_base (ref); |
1033 | modref_access_node a = {ref->offset, ref->size, ref->max_size, | |
1f3a3363 | 1034 | 0, MODREF_UNKNOWN_PARM, false, 0}; |
c33f4742 JH |
1035 | if (TREE_CODE (base) == MEM_REF || TREE_CODE (base) == TARGET_MEM_REF) |
1036 | { | |
2bdf324f | 1037 | tree memref = base; |
0f5afb62 | 1038 | modref_parm_map m = parm_map_for_ptr (TREE_OPERAND (base, 0)); |
1f3a3363 | 1039 | |
0f5afb62 JH |
1040 | a.parm_index = m.parm_index; |
1041 | if (a.parm_index != MODREF_UNKNOWN_PARM && TREE_CODE (memref) == MEM_REF) | |
1f3a3363 JH |
1042 | { |
1043 | a.parm_offset_known | |
1044 | = wi::to_poly_wide (TREE_OPERAND | |
1045 | (memref, 1)).to_shwi (&a.parm_offset); | |
0f5afb62 JH |
1046 | if (a.parm_offset_known && m.parm_offset_known) |
1047 | a.parm_offset += m.parm_offset; | |
1048 | else | |
1049 | a.parm_offset_known = false; | |
c33f4742 | 1050 | } |
c33f4742 JH |
1051 | } |
1052 | else | |
1f3a3363 | 1053 | a.parm_index = MODREF_UNKNOWN_PARM; |
c33f4742 JH |
1054 | return a; |
1055 | } | |
1056 | ||
d119f34c JH |
1057 | /* Record access into the modref_records data structure. */ |
1058 | ||
09a4ffb7 JH |
1059 | void |
1060 | modref_access_analysis::record_access (modref_records *tt, | |
1061 | ao_ref *ref, | |
1062 | modref_access_node &a) | |
d119f34c | 1063 | { |
16c84809 JH |
1064 | alias_set_type base_set = !flag_strict_aliasing |
1065 | || !flag_ipa_strict_aliasing ? 0 | |
d119f34c | 1066 | : ao_ref_base_alias_set (ref); |
16c84809 JH |
1067 | alias_set_type ref_set = !flag_strict_aliasing |
1068 | || !flag_ipa_strict_aliasing ? 0 | |
d119f34c JH |
1069 | : (ao_ref_alias_set (ref)); |
1070 | if (dump_file) | |
1071 | { | |
4898e958 JH |
1072 | fprintf (dump_file, " - Recording base_set=%i ref_set=%i ", |
1073 | base_set, ref_set); | |
e30bf330 | 1074 | a.dump (dump_file); |
d119f34c | 1075 | } |
8632f8c6 | 1076 | tt->insert (current_function_decl, base_set, ref_set, a, false); |
d119f34c JH |
1077 | } |
1078 | ||
1079 | /* IPA version of record_access_tree. */ | |
1080 | ||
09a4ffb7 JH |
1081 | void |
1082 | modref_access_analysis::record_access_lto (modref_records_lto *tt, ao_ref *ref, | |
1083 | modref_access_node &a) | |
d119f34c JH |
1084 | { |
1085 | /* get_alias_set sometimes use different type to compute the alias set | |
1086 | than TREE_TYPE (base). Do same adjustments. */ | |
1087 | tree base_type = NULL_TREE, ref_type = NULL_TREE; | |
16c84809 | 1088 | if (flag_strict_aliasing && flag_ipa_strict_aliasing) |
d119f34c JH |
1089 | { |
1090 | tree base; | |
1091 | ||
1092 | base = ref->ref; | |
1093 | while (handled_component_p (base)) | |
1094 | base = TREE_OPERAND (base, 0); | |
1095 | ||
1096 | base_type = reference_alias_ptr_type_1 (&base); | |
1097 | ||
1098 | if (!base_type) | |
1099 | base_type = TREE_TYPE (base); | |
1100 | else | |
1101 | base_type = TYPE_REF_CAN_ALIAS_ALL (base_type) | |
1102 | ? NULL_TREE : TREE_TYPE (base_type); | |
1103 | ||
1104 | tree ref_expr = ref->ref; | |
1105 | ref_type = reference_alias_ptr_type_1 (&ref_expr); | |
1106 | ||
1107 | if (!ref_type) | |
1108 | ref_type = TREE_TYPE (ref_expr); | |
1109 | else | |
1110 | ref_type = TYPE_REF_CAN_ALIAS_ALL (ref_type) | |
1111 | ? NULL_TREE : TREE_TYPE (ref_type); | |
1112 | ||
1113 | /* Sanity check that we are in sync with what get_alias_set does. */ | |
1114 | gcc_checking_assert ((!base_type && !ao_ref_base_alias_set (ref)) | |
1115 | || get_alias_set (base_type) | |
1116 | == ao_ref_base_alias_set (ref)); | |
1117 | gcc_checking_assert ((!ref_type && !ao_ref_alias_set (ref)) | |
1118 | || get_alias_set (ref_type) | |
1119 | == ao_ref_alias_set (ref)); | |
1120 | ||
1121 | /* Do not bother to record types that have no meaningful alias set. | |
1122 | Also skip variably modified types since these go to local streams. */ | |
1123 | if (base_type && (!get_alias_set (base_type) | |
1124 | || variably_modified_type_p (base_type, NULL_TREE))) | |
1125 | base_type = NULL_TREE; | |
1126 | if (ref_type && (!get_alias_set (ref_type) | |
1127 | || variably_modified_type_p (ref_type, NULL_TREE))) | |
1128 | ref_type = NULL_TREE; | |
1129 | } | |
1130 | if (dump_file) | |
1131 | { | |
1132 | fprintf (dump_file, " - Recording base type:"); | |
1133 | print_generic_expr (dump_file, base_type); | |
1134 | fprintf (dump_file, " (alias set %i) ref type:", | |
1135 | base_type ? get_alias_set (base_type) : 0); | |
1136 | print_generic_expr (dump_file, ref_type); | |
4898e958 JH |
1137 | fprintf (dump_file, " (alias set %i) ", |
1138 | ref_type ? get_alias_set (ref_type) : 0); | |
e30bf330 | 1139 | a.dump (dump_file); |
d119f34c JH |
1140 | } |
1141 | ||
8632f8c6 | 1142 | tt->insert (current_function_decl, base_type, ref_type, a, false); |
d119f34c JH |
1143 | } |
1144 | ||
1145 | /* Returns true if and only if we should store the access to EXPR. | |
1146 | Some accesses, e.g. loads from automatic variables, are not interesting. */ | |
1147 | ||
09a4ffb7 JH |
1148 | bool |
1149 | modref_access_analysis::record_access_p (tree expr) | |
d119f34c | 1150 | { |
09a4ffb7 JH |
1151 | if (TREE_THIS_VOLATILE (expr)) |
1152 | { | |
1153 | if (dump_file) | |
1154 | fprintf (dump_file, " (volatile; marking nondeterministic) "); | |
1155 | set_nondeterministic (); | |
1156 | } | |
1157 | if (cfun->can_throw_non_call_exceptions | |
1158 | && tree_could_throw_p (expr)) | |
1159 | { | |
1160 | if (dump_file) | |
1161 | fprintf (dump_file, " (can throw; marking side effects) "); | |
1162 | set_side_effects (); | |
1163 | } | |
1164 | ||
e977dd5e | 1165 | if (refs_local_or_readonly_memory_p (expr)) |
d119f34c JH |
1166 | { |
1167 | if (dump_file) | |
e977dd5e | 1168 | fprintf (dump_file, " - Read-only or local, ignoring.\n"); |
d119f34c JH |
1169 | return false; |
1170 | } | |
d119f34c JH |
1171 | return true; |
1172 | } | |
1173 | ||
09a4ffb7 | 1174 | /* Collapse loads and return true if something changed. */ |
85ebbabd | 1175 | |
09a4ffb7 JH |
1176 | bool |
1177 | modref_access_analysis::record_unknown_load () | |
85ebbabd | 1178 | { |
09a4ffb7 | 1179 | bool changed = false; |
d119f34c | 1180 | |
09a4ffb7 JH |
1181 | if (m_summary && !m_summary->loads->every_base) |
1182 | { | |
1183 | m_summary->loads->collapse (); | |
1184 | changed = true; | |
1185 | } | |
1186 | if (m_summary_lto && !m_summary_lto->loads->every_base) | |
1187 | { | |
1188 | m_summary_lto->loads->collapse (); | |
1189 | changed = true; | |
1190 | } | |
1191 | return changed; | |
d119f34c JH |
1192 | } |
1193 | ||
09a4ffb7 | 1194 | /* Collapse loads and return true if something changed. */ |
617695cd | 1195 | |
09a4ffb7 JH |
1196 | bool |
1197 | modref_access_analysis::record_unknown_store () | |
617695cd | 1198 | { |
09a4ffb7 | 1199 | bool changed = false; |
ea937e7d | 1200 | |
09a4ffb7 | 1201 | if (m_summary && !m_summary->stores->every_base) |
617695cd | 1202 | { |
09a4ffb7 JH |
1203 | m_summary->stores->collapse (); |
1204 | changed = true; | |
617695cd | 1205 | } |
09a4ffb7 JH |
1206 | if (m_summary_lto && !m_summary_lto->stores->every_base) |
1207 | { | |
1208 | m_summary_lto->stores->collapse (); | |
1209 | changed = true; | |
1210 | } | |
1211 | return changed; | |
617695cd JH |
1212 | } |
1213 | ||
02c80893 | 1214 | /* Record unknown load from global memory. */ |
3305135c JH |
1215 | |
1216 | bool | |
1217 | modref_access_analysis::record_global_memory_load () | |
1218 | { | |
1219 | bool changed = false; | |
1220 | modref_access_node a = {0, -1, -1, | |
1221 | 0, MODREF_GLOBAL_MEMORY_PARM, false, 0}; | |
1222 | ||
1223 | if (m_summary && !m_summary->loads->every_base) | |
1224 | changed |= m_summary->loads->insert (current_function_decl, 0, 0, a, false); | |
1225 | if (m_summary_lto && !m_summary_lto->loads->every_base) | |
1226 | changed |= m_summary_lto->loads->insert (current_function_decl, | |
1227 | 0, 0, a, false); | |
1228 | return changed; | |
1229 | } | |
1230 | ||
02c80893 | 1231 | /* Record unknown store from global memory. */ |
3305135c JH |
1232 | |
1233 | bool | |
1234 | modref_access_analysis::record_global_memory_store () | |
1235 | { | |
1236 | bool changed = false; | |
1237 | modref_access_node a = {0, -1, -1, | |
1238 | 0, MODREF_GLOBAL_MEMORY_PARM, false, 0}; | |
1239 | ||
1240 | if (m_summary && !m_summary->stores->every_base) | |
1241 | changed |= m_summary->stores->insert (current_function_decl, | |
1242 | 0, 0, a, false); | |
1243 | if (m_summary_lto && !m_summary_lto->stores->every_base) | |
1244 | changed |= m_summary_lto->stores->insert (current_function_decl, | |
1245 | 0, 0, a, false); | |
1246 | return changed; | |
1247 | } | |
1248 | ||
09a4ffb7 JH |
1249 | /* Merge side effects of call STMT to function with CALLEE_SUMMARY. |
1250 | Return true if something changed. | |
5c85f295 JH |
1251 | If IGNORE_STORES is true, do not merge stores. |
1252 | If RECORD_ADJUSTMENTS is true cap number of adjustments to | |
1253 | a given access to make dataflow finite. */ | |
ada353b8 JH |
1254 | |
1255 | bool | |
09a4ffb7 JH |
1256 | modref_access_analysis::merge_call_side_effects |
1257 | (gimple *stmt, modref_summary *callee_summary, | |
1258 | cgraph_node *callee_node, bool record_adjustments) | |
ada353b8 | 1259 | { |
3305135c JH |
1260 | gcall *call = as_a <gcall *> (stmt); |
1261 | int flags = gimple_call_flags (call); | |
8d3abf42 | 1262 | |
09a4ffb7 | 1263 | /* Nothing to do for non-looping cont functions. */ |
64f3e71c JH |
1264 | if ((flags & (ECF_CONST | ECF_NOVOPS)) |
1265 | && !(flags & ECF_LOOPING_CONST_OR_PURE)) | |
09a4ffb7 JH |
1266 | return false; |
1267 | ||
1268 | bool changed = false; | |
64f3e71c | 1269 | |
ce2dbf94 JH |
1270 | if (dump_file) |
1271 | fprintf (dump_file, " - Merging side effects of %s\n", | |
1272 | callee_node->dump_name ()); | |
1273 | ||
09a4ffb7 JH |
1274 | /* Merge side effects and non-determinism. |
1275 | PURE/CONST flags makes functions deterministic and if there is | |
1276 | no LOOPING_CONST_OR_PURE they also have no side effects. */ | |
a34edf9a JH |
1277 | if (!(flags & (ECF_CONST | ECF_NOVOPS | ECF_PURE)) |
1278 | || (flags & ECF_LOOPING_CONST_OR_PURE)) | |
8d3abf42 | 1279 | { |
09a4ffb7 | 1280 | if (!m_summary->side_effects && callee_summary->side_effects) |
a34edf9a JH |
1281 | { |
1282 | if (dump_file) | |
1283 | fprintf (dump_file, " - merging side effects.\n"); | |
09a4ffb7 | 1284 | m_summary->side_effects = true; |
a34edf9a JH |
1285 | changed = true; |
1286 | } | |
09a4ffb7 | 1287 | if (!m_summary->nondeterministic && callee_summary->nondeterministic |
a34edf9a JH |
1288 | && !ignore_nondeterminism_p (current_function_decl, flags)) |
1289 | { | |
1290 | if (dump_file) | |
1291 | fprintf (dump_file, " - merging nondeterministic.\n"); | |
09a4ffb7 | 1292 | m_summary->nondeterministic = true; |
a34edf9a JH |
1293 | changed = true; |
1294 | } | |
1295 | } | |
8d3abf42 | 1296 | |
09a4ffb7 | 1297 | /* For const functions we are done. */ |
8d3abf42 JH |
1298 | if (flags & (ECF_CONST | ECF_NOVOPS)) |
1299 | return changed; | |
ada353b8 | 1300 | |
09a4ffb7 JH |
1301 | /* Merge calls_interposable flags. */ |
1302 | if (!m_summary->calls_interposable && callee_summary->calls_interposable) | |
a34edf9a JH |
1303 | { |
1304 | if (dump_file) | |
1305 | fprintf (dump_file, " - merging calls interposable.\n"); | |
09a4ffb7 | 1306 | m_summary->calls_interposable = true; |
a34edf9a JH |
1307 | changed = true; |
1308 | } | |
1309 | ||
09a4ffb7 | 1310 | if (!callee_node->binds_to_current_def_p () && !m_summary->calls_interposable) |
617695cd JH |
1311 | { |
1312 | if (dump_file) | |
a34edf9a | 1313 | fprintf (dump_file, " - May be interposed.\n"); |
09a4ffb7 | 1314 | m_summary->calls_interposable = true; |
a34edf9a | 1315 | changed = true; |
617695cd JH |
1316 | } |
1317 | ||
09a4ffb7 JH |
1318 | /* Now merge the actual load, store and kill vectors. For this we need |
1319 | to compute map translating new parameters to old. */ | |
0b874e0f | 1320 | if (dump_file) |
ce2dbf94 | 1321 | fprintf (dump_file, " Parm map:"); |
0b874e0f | 1322 | |
09a4ffb7 | 1323 | auto_vec <modref_parm_map, 32> parm_map; |
3305135c JH |
1324 | parm_map.safe_grow_cleared (gimple_call_num_args (call), true); |
1325 | for (unsigned i = 0; i < gimple_call_num_args (call); i++) | |
ada353b8 | 1326 | { |
3305135c | 1327 | parm_map[i] = parm_map_for_ptr (gimple_call_arg (call, i)); |
56cb815b | 1328 | if (dump_file) |
c7b6a758 JH |
1329 | { |
1330 | fprintf (dump_file, " %i", parm_map[i].parm_index); | |
1331 | if (parm_map[i].parm_offset_known) | |
1332 | { | |
1333 | fprintf (dump_file, " offset:"); | |
1334 | print_dec ((poly_int64_pod)parm_map[i].parm_offset, | |
1335 | dump_file, SIGNED); | |
1336 | } | |
1337 | } | |
ada353b8 | 1338 | } |
09a4ffb7 JH |
1339 | |
1340 | modref_parm_map chain_map; | |
3305135c | 1341 | if (gimple_call_chain (call)) |
1f3a3363 | 1342 | { |
3305135c | 1343 | chain_map = parm_map_for_ptr (gimple_call_chain (call)); |
1f3a3363 JH |
1344 | if (dump_file) |
1345 | { | |
1346 | fprintf (dump_file, "static chain %i", chain_map.parm_index); | |
1347 | if (chain_map.parm_offset_known) | |
1348 | { | |
1349 | fprintf (dump_file, " offset:"); | |
1350 | print_dec ((poly_int64_pod)chain_map.parm_offset, | |
1351 | dump_file, SIGNED); | |
1352 | } | |
1353 | } | |
1354 | } | |
56cb815b JH |
1355 | if (dump_file) |
1356 | fprintf (dump_file, "\n"); | |
ada353b8 | 1357 | |
09a4ffb7 JH |
1358 | /* Kills can me merged in only if we know the function is going to be |
1359 | always executed. */ | |
1360 | if (m_always_executed | |
e69b7c57 JH |
1361 | && callee_summary->kills.length () |
1362 | && (!cfun->can_throw_non_call_exceptions | |
3305135c | 1363 | || !stmt_could_throw_p (cfun, call))) |
e69b7c57 JH |
1364 | { |
1365 | /* Watch for self recursive updates. */ | |
1366 | auto_vec<modref_access_node, 32> saved_kills; | |
1367 | ||
1368 | saved_kills.reserve_exact (callee_summary->kills.length ()); | |
1369 | saved_kills.splice (callee_summary->kills); | |
1370 | for (auto kill : saved_kills) | |
1371 | { | |
1372 | if (kill.parm_index >= (int)parm_map.length ()) | |
1373 | continue; | |
1374 | modref_parm_map &m | |
1375 | = kill.parm_index == MODREF_STATIC_CHAIN_PARM | |
1376 | ? chain_map | |
1377 | : parm_map[kill.parm_index]; | |
1378 | if (m.parm_index == MODREF_LOCAL_MEMORY_PARM | |
1379 | || m.parm_index == MODREF_UNKNOWN_PARM | |
1380 | || m.parm_index == MODREF_RETSLOT_PARM | |
1381 | || !m.parm_offset_known) | |
1382 | continue; | |
1383 | modref_access_node n = kill; | |
1384 | n.parm_index = m.parm_index; | |
1385 | n.parm_offset += m.parm_offset; | |
09a4ffb7 | 1386 | if (modref_access_node::insert_kill (m_summary->kills, n, |
e69b7c57 JH |
1387 | record_adjustments)) |
1388 | changed = true; | |
1389 | } | |
1390 | } | |
1391 | ||
09a4ffb7 | 1392 | /* Merge in loads. */ |
8632f8c6 JH |
1393 | changed |= m_summary->loads->merge (current_function_decl, |
1394 | callee_summary->loads, | |
1395 | &parm_map, &chain_map, | |
3305135c JH |
1396 | record_adjustments, |
1397 | !may_access_nonescaping_parm_p | |
1398 | (call, flags, true)); | |
09a4ffb7 JH |
1399 | /* Merge in stores. */ |
1400 | if (!ignore_stores_p (current_function_decl, flags)) | |
617695cd | 1401 | { |
8632f8c6 JH |
1402 | changed |= m_summary->stores->merge (current_function_decl, |
1403 | callee_summary->stores, | |
09a4ffb7 | 1404 | &parm_map, &chain_map, |
3305135c JH |
1405 | record_adjustments, |
1406 | !may_access_nonescaping_parm_p | |
1407 | (call, flags, false)); | |
09a4ffb7 | 1408 | if (!m_summary->writes_errno |
617695cd JH |
1409 | && callee_summary->writes_errno) |
1410 | { | |
09a4ffb7 | 1411 | m_summary->writes_errno = true; |
617695cd JH |
1412 | changed = true; |
1413 | } | |
1414 | } | |
ada353b8 JH |
1415 | return changed; |
1416 | } | |
1417 | ||
617695cd JH |
1418 | /* Return access mode for argument I of call STMT with FNSPEC. */ |
1419 | ||
09a4ffb7 JH |
1420 | modref_access_node |
1421 | modref_access_analysis::get_access_for_fnspec (gcall *call, attr_fnspec &fnspec, | |
1422 | unsigned int i, | |
1423 | modref_parm_map &map) | |
617695cd JH |
1424 | { |
1425 | tree size = NULL_TREE; | |
1426 | unsigned int size_arg; | |
1427 | ||
1428 | if (!fnspec.arg_specified_p (i)) | |
1429 | ; | |
1430 | else if (fnspec.arg_max_access_size_given_by_arg_p (i, &size_arg)) | |
1431 | size = gimple_call_arg (call, size_arg); | |
1432 | else if (fnspec.arg_access_size_given_by_type_p (i)) | |
1433 | { | |
1434 | tree callee = gimple_call_fndecl (call); | |
1435 | tree t = TYPE_ARG_TYPES (TREE_TYPE (callee)); | |
1436 | ||
1437 | for (unsigned int p = 0; p < i; p++) | |
1438 | t = TREE_CHAIN (t); | |
1439 | size = TYPE_SIZE_UNIT (TREE_TYPE (TREE_VALUE (t))); | |
1440 | } | |
1441 | modref_access_node a = {0, -1, -1, | |
1442 | map.parm_offset, map.parm_index, | |
5c85f295 | 1443 | map.parm_offset_known, 0}; |
617695cd JH |
1444 | poly_int64 size_hwi; |
1445 | if (size | |
1446 | && poly_int_tree_p (size, &size_hwi) | |
1447 | && coeffs_in_range_p (size_hwi, 0, | |
1448 | HOST_WIDE_INT_MAX / BITS_PER_UNIT)) | |
1449 | { | |
1450 | a.size = -1; | |
1451 | a.max_size = size_hwi << LOG2_BITS_PER_UNIT; | |
1452 | } | |
1453 | return a; | |
1454 | } | |
617695cd JH |
1455 | /* Apply side effects of call STMT to CUR_SUMMARY using FNSPEC. |
1456 | If IGNORE_STORES is true ignore them. | |
1457 | Return false if no useful summary can be produced. */ | |
1458 | ||
09a4ffb7 JH |
1459 | void |
1460 | modref_access_analysis::process_fnspec (gcall *call) | |
617695cd | 1461 | { |
992644c3 JH |
1462 | int flags = gimple_call_flags (call); |
1463 | ||
09a4ffb7 JH |
1464 | /* PURE/CONST flags makes functions deterministic and if there is |
1465 | no LOOPING_CONST_OR_PURE they also have no side effects. */ | |
8d3abf42 | 1466 | if (!(flags & (ECF_CONST | ECF_NOVOPS | ECF_PURE)) |
992644c3 JH |
1467 | || (flags & ECF_LOOPING_CONST_OR_PURE) |
1468 | || (cfun->can_throw_non_call_exceptions | |
1469 | && stmt_could_throw_p (cfun, call))) | |
1470 | { | |
09a4ffb7 JH |
1471 | set_side_effects (); |
1472 | if (!ignore_nondeterminism_p (current_function_decl, flags)) | |
1473 | set_nondeterministic (); | |
992644c3 | 1474 | } |
09a4ffb7 JH |
1475 | |
1476 | /* For const functions we are done. */ | |
8d3abf42 | 1477 | if (flags & (ECF_CONST | ECF_NOVOPS)) |
09a4ffb7 JH |
1478 | return; |
1479 | ||
1480 | attr_fnspec fnspec = gimple_call_fnspec (call); | |
1481 | /* If there is no fnpec we know nothing about loads & stores. */ | |
617695cd JH |
1482 | if (!fnspec.known_p ()) |
1483 | { | |
1484 | if (dump_file && gimple_call_builtin_p (call, BUILT_IN_NORMAL)) | |
1485 | fprintf (dump_file, " Builtin with no fnspec: %s\n", | |
1486 | IDENTIFIER_POINTER (DECL_NAME (gimple_call_fndecl (call)))); | |
09a4ffb7 | 1487 | if (!ignore_stores_p (current_function_decl, flags)) |
3305135c JH |
1488 | { |
1489 | if (!may_access_nonescaping_parm_p (call, flags, false)) | |
1490 | record_global_memory_store (); | |
1491 | else | |
1492 | record_unknown_store (); | |
1493 | if (!may_access_nonescaping_parm_p (call, flags, true)) | |
1494 | record_global_memory_load (); | |
1495 | else | |
1496 | record_unknown_load (); | |
1497 | } | |
1498 | else | |
1499 | { | |
1500 | if (!may_access_nonescaping_parm_p (call, flags, true)) | |
1501 | record_global_memory_load (); | |
1502 | else | |
1503 | record_unknown_load (); | |
1504 | } | |
09a4ffb7 | 1505 | return; |
617695cd | 1506 | } |
09a4ffb7 | 1507 | /* Process fnspec. */ |
617695cd | 1508 | if (fnspec.global_memory_read_p ()) |
3305135c JH |
1509 | { |
1510 | if (may_access_nonescaping_parm_p (call, flags, true)) | |
1511 | record_unknown_load (); | |
1512 | else | |
1513 | record_global_memory_load (); | |
1514 | } | |
617695cd JH |
1515 | else |
1516 | { | |
1517 | for (unsigned int i = 0; i < gimple_call_num_args (call); i++) | |
1518 | if (!POINTER_TYPE_P (TREE_TYPE (gimple_call_arg (call, i)))) | |
1519 | ; | |
1520 | else if (!fnspec.arg_specified_p (i) | |
1521 | || fnspec.arg_maybe_read_p (i)) | |
1522 | { | |
0f5afb62 | 1523 | modref_parm_map map = parm_map_for_ptr |
1f3a3363 | 1524 | (gimple_call_arg (call, i)); |
617695cd | 1525 | |
1f3a3363 | 1526 | if (map.parm_index == MODREF_LOCAL_MEMORY_PARM) |
617695cd | 1527 | continue; |
1f3a3363 | 1528 | if (map.parm_index == MODREF_UNKNOWN_PARM) |
617695cd | 1529 | { |
09a4ffb7 | 1530 | record_unknown_load (); |
617695cd JH |
1531 | break; |
1532 | } | |
09a4ffb7 | 1533 | modref_access_node a = get_access_for_fnspec (call, fnspec, i, map); |
0f5afb62 JH |
1534 | if (a.parm_index == MODREF_LOCAL_MEMORY_PARM) |
1535 | continue; | |
09a4ffb7 | 1536 | if (m_summary) |
8632f8c6 | 1537 | m_summary->loads->insert (current_function_decl, 0, 0, a, false); |
09a4ffb7 | 1538 | if (m_summary_lto) |
8632f8c6 JH |
1539 | m_summary_lto->loads->insert (current_function_decl, 0, 0, a, |
1540 | false); | |
617695cd JH |
1541 | } |
1542 | } | |
09a4ffb7 JH |
1543 | if (ignore_stores_p (current_function_decl, flags)) |
1544 | return; | |
617695cd | 1545 | if (fnspec.global_memory_written_p ()) |
3305135c JH |
1546 | { |
1547 | if (may_access_nonescaping_parm_p (call, flags, false)) | |
1548 | record_unknown_store (); | |
1549 | else | |
1550 | record_global_memory_store (); | |
1551 | } | |
617695cd JH |
1552 | else |
1553 | { | |
1554 | for (unsigned int i = 0; i < gimple_call_num_args (call); i++) | |
1555 | if (!POINTER_TYPE_P (TREE_TYPE (gimple_call_arg (call, i)))) | |
1556 | ; | |
1557 | else if (!fnspec.arg_specified_p (i) | |
1558 | || fnspec.arg_maybe_written_p (i)) | |
1559 | { | |
0f5afb62 | 1560 | modref_parm_map map = parm_map_for_ptr |
1f3a3363 | 1561 | (gimple_call_arg (call, i)); |
617695cd | 1562 | |
1f3a3363 | 1563 | if (map.parm_index == MODREF_LOCAL_MEMORY_PARM) |
617695cd | 1564 | continue; |
1f3a3363 | 1565 | if (map.parm_index == MODREF_UNKNOWN_PARM) |
617695cd | 1566 | { |
09a4ffb7 | 1567 | record_unknown_store (); |
617695cd JH |
1568 | break; |
1569 | } | |
09a4ffb7 | 1570 | modref_access_node a = get_access_for_fnspec (call, fnspec, i, map); |
0f5afb62 JH |
1571 | if (a.parm_index == MODREF_LOCAL_MEMORY_PARM) |
1572 | continue; | |
09a4ffb7 | 1573 | if (m_summary) |
8632f8c6 | 1574 | m_summary->stores->insert (current_function_decl, 0, 0, a, false); |
09a4ffb7 | 1575 | if (m_summary_lto) |
8632f8c6 JH |
1576 | m_summary_lto->stores->insert (current_function_decl, |
1577 | 0, 0, a, false); | |
617695cd JH |
1578 | } |
1579 | if (fnspec.errno_maybe_written_p () && flag_errno_math) | |
6cef01c3 | 1580 | { |
09a4ffb7 JH |
1581 | if (m_summary) |
1582 | m_summary->writes_errno = true; | |
1583 | if (m_summary_lto) | |
1584 | m_summary_lto->writes_errno = true; | |
6cef01c3 | 1585 | } |
617695cd | 1586 | } |
617695cd JH |
1587 | } |
1588 | ||
ada353b8 JH |
1589 | /* Analyze function call STMT in function F. |
1590 | Remember recursive calls in RECURSIVE_CALLS. */ | |
d119f34c | 1591 | |
09a4ffb7 JH |
1592 | void |
1593 | modref_access_analysis::analyze_call (gcall *stmt) | |
d119f34c JH |
1594 | { |
1595 | /* Check flags on the function call. In certain cases, analysis can be | |
1596 | simplified. */ | |
1597 | int flags = gimple_call_flags (stmt); | |
09a4ffb7 | 1598 | |
3305135c JH |
1599 | if (dump_file) |
1600 | { | |
1601 | fprintf (dump_file, " - Analyzing call:"); | |
1602 | print_gimple_stmt (dump_file, stmt, 0); | |
1603 | } | |
1604 | ||
8d3abf42 JH |
1605 | if ((flags & (ECF_CONST | ECF_NOVOPS)) |
1606 | && !(flags & ECF_LOOPING_CONST_OR_PURE)) | |
d119f34c JH |
1607 | { |
1608 | if (dump_file) | |
1609 | fprintf (dump_file, | |
1610 | " - ECF_CONST | ECF_NOVOPS, ignoring all stores and all loads " | |
1611 | "except for args.\n"); | |
09a4ffb7 | 1612 | return; |
d119f34c JH |
1613 | } |
1614 | ||
d119f34c JH |
1615 | /* Next, we try to get the callee's function declaration. The goal is to |
1616 | merge their summary with ours. */ | |
1617 | tree callee = gimple_call_fndecl (stmt); | |
1618 | ||
1619 | /* Check if this is an indirect call. */ | |
1620 | if (!callee) | |
1621 | { | |
d119f34c | 1622 | if (dump_file) |
6cef01c3 JH |
1623 | fprintf (dump_file, gimple_call_internal_p (stmt) |
1624 | ? " - Internal call" : " - Indirect call.\n"); | |
09a4ffb7 JH |
1625 | process_fnspec (stmt); |
1626 | return; | |
d119f34c | 1627 | } |
6cef01c3 | 1628 | /* We only need to handle internal calls in IPA mode. */ |
09a4ffb7 | 1629 | gcc_checking_assert (!m_summary_lto && !m_ipa); |
d119f34c JH |
1630 | |
1631 | struct cgraph_node *callee_node = cgraph_node::get_create (callee); | |
1632 | ||
d119f34c JH |
1633 | /* If this is a recursive call, the target summary is the same as ours, so |
1634 | there's nothing to do. */ | |
1635 | if (recursive_call_p (current_function_decl, callee)) | |
1636 | { | |
09a4ffb7 JH |
1637 | m_recursive_calls.safe_push (stmt); |
1638 | set_side_effects (); | |
d119f34c JH |
1639 | if (dump_file) |
1640 | fprintf (dump_file, " - Skipping recursive call.\n"); | |
09a4ffb7 | 1641 | return; |
d119f34c JH |
1642 | } |
1643 | ||
1644 | gcc_assert (callee_node != NULL); | |
1645 | ||
1646 | /* Get the function symbol and its availability. */ | |
1647 | enum availability avail; | |
1648 | callee_node = callee_node->function_symbol (&avail); | |
992644c3 JH |
1649 | bool looping; |
1650 | if (builtin_safe_for_const_function_p (&looping, callee)) | |
1651 | { | |
1652 | if (looping) | |
09a4ffb7 | 1653 | set_side_effects (); |
992644c3 | 1654 | if (dump_file) |
09a4ffb7 JH |
1655 | fprintf (dump_file, " - Builtin is safe for const.\n"); |
1656 | return; | |
992644c3 | 1657 | } |
d119f34c JH |
1658 | if (avail <= AVAIL_INTERPOSABLE) |
1659 | { | |
d119f34c | 1660 | if (dump_file) |
09a4ffb7 JH |
1661 | fprintf (dump_file, |
1662 | " - Function availability <= AVAIL_INTERPOSABLE.\n"); | |
1663 | process_fnspec (stmt); | |
1664 | return; | |
d119f34c JH |
1665 | } |
1666 | ||
1667 | /* Get callee's modref summary. As above, if there's no summary, we either | |
1668 | have to give up or, if stores are ignored, we can just purge loads. */ | |
71dbabcc | 1669 | modref_summary *callee_summary = optimization_summaries->get (callee_node); |
d119f34c JH |
1670 | if (!callee_summary) |
1671 | { | |
d119f34c JH |
1672 | if (dump_file) |
1673 | fprintf (dump_file, " - No modref summary available for callee.\n"); | |
09a4ffb7 JH |
1674 | process_fnspec (stmt); |
1675 | return; | |
d119f34c JH |
1676 | } |
1677 | ||
09a4ffb7 | 1678 | merge_call_side_effects (stmt, callee_summary, callee_node, false); |
d119f34c | 1679 | |
09a4ffb7 | 1680 | return; |
d119f34c JH |
1681 | } |
1682 | ||
1683 | /* Helper for analyze_stmt. */ | |
1684 | ||
09a4ffb7 JH |
1685 | bool |
1686 | modref_access_analysis::analyze_load (gimple *, tree, tree op, void *data) | |
d119f34c | 1687 | { |
09a4ffb7 | 1688 | modref_access_analysis *t = (modref_access_analysis *)data; |
d119f34c JH |
1689 | |
1690 | if (dump_file) | |
1691 | { | |
1692 | fprintf (dump_file, " - Analyzing load: "); | |
1693 | print_generic_expr (dump_file, op); | |
1694 | fprintf (dump_file, "\n"); | |
1695 | } | |
1696 | ||
09a4ffb7 | 1697 | if (!t->record_access_p (op)) |
d119f34c JH |
1698 | return false; |
1699 | ||
1700 | ao_ref r; | |
1701 | ao_ref_init (&r, op); | |
64f3e71c | 1702 | modref_access_node a = get_access (&r); |
0f5afb62 JH |
1703 | if (a.parm_index == MODREF_LOCAL_MEMORY_PARM) |
1704 | return false; | |
d119f34c | 1705 | |
09a4ffb7 JH |
1706 | if (t->m_summary) |
1707 | t->record_access (t->m_summary->loads, &r, a); | |
1708 | if (t->m_summary_lto) | |
1709 | t->record_access_lto (t->m_summary_lto->loads, &r, a); | |
d119f34c JH |
1710 | return false; |
1711 | } | |
1712 | ||
1713 | /* Helper for analyze_stmt. */ | |
1714 | ||
09a4ffb7 JH |
1715 | bool |
1716 | modref_access_analysis::analyze_store (gimple *stmt, tree, tree op, void *data) | |
d119f34c | 1717 | { |
09a4ffb7 | 1718 | modref_access_analysis *t = (modref_access_analysis *)data; |
d119f34c JH |
1719 | |
1720 | if (dump_file) | |
1721 | { | |
1722 | fprintf (dump_file, " - Analyzing store: "); | |
1723 | print_generic_expr (dump_file, op); | |
1724 | fprintf (dump_file, "\n"); | |
1725 | } | |
1726 | ||
09a4ffb7 | 1727 | if (!t->record_access_p (op)) |
d119f34c JH |
1728 | return false; |
1729 | ||
1730 | ao_ref r; | |
1731 | ao_ref_init (&r, op); | |
64f3e71c | 1732 | modref_access_node a = get_access (&r); |
0f5afb62 JH |
1733 | if (a.parm_index == MODREF_LOCAL_MEMORY_PARM) |
1734 | return false; | |
d119f34c | 1735 | |
09a4ffb7 JH |
1736 | if (t->m_summary) |
1737 | t->record_access (t->m_summary->stores, &r, a); | |
1738 | if (t->m_summary_lto) | |
1739 | t->record_access_lto (t->m_summary_lto->stores, &r, a); | |
1740 | if (t->m_always_executed | |
64f3e71c JH |
1741 | && a.useful_for_kill_p () |
1742 | && (!cfun->can_throw_non_call_exceptions | |
1743 | || !stmt_could_throw_p (cfun, stmt))) | |
1744 | { | |
1745 | if (dump_file) | |
1746 | fprintf (dump_file, " - Recording kill\n"); | |
09a4ffb7 JH |
1747 | if (t->m_summary) |
1748 | modref_access_node::insert_kill (t->m_summary->kills, a, false); | |
1749 | if (t->m_summary_lto) | |
1750 | modref_access_node::insert_kill (t->m_summary_lto->kills, a, false); | |
64f3e71c | 1751 | } |
d119f34c JH |
1752 | return false; |
1753 | } | |
1754 | ||
1755 | /* Analyze statement STMT of function F. | |
1756 | If IPA is true do not merge in side effects of calls. */ | |
1757 | ||
09a4ffb7 JH |
1758 | void |
1759 | modref_access_analysis::analyze_stmt (gimple *stmt, bool always_executed) | |
d119f34c | 1760 | { |
09a4ffb7 | 1761 | m_always_executed = always_executed; |
8a2fd716 JJ |
1762 | /* In general we can not ignore clobbers because they are barriers for code |
1763 | motion, however after inlining it is safe to do because local optimization | |
3991912e | 1764 | passes do not consider clobbers from other functions. |
e53b6e56 | 1765 | Similar logic is in ipa-pure-const.cc. */ |
09a4ffb7 | 1766 | if ((m_ipa || cfun->after_inlining) && gimple_clobber_p (stmt)) |
64f3e71c | 1767 | { |
74509b96 | 1768 | if (always_executed && record_access_p (gimple_assign_lhs (stmt))) |
64f3e71c JH |
1769 | { |
1770 | ao_ref r; | |
1771 | ao_ref_init (&r, gimple_assign_lhs (stmt)); | |
1772 | modref_access_node a = get_access (&r); | |
1773 | if (a.useful_for_kill_p ()) | |
1774 | { | |
1775 | if (dump_file) | |
1776 | fprintf (dump_file, " - Recording kill\n"); | |
09a4ffb7 JH |
1777 | if (m_summary) |
1778 | modref_access_node::insert_kill (m_summary->kills, a, false); | |
1779 | if (m_summary_lto) | |
1780 | modref_access_node::insert_kill (m_summary_lto->kills, | |
1781 | a, false); | |
64f3e71c JH |
1782 | } |
1783 | } | |
09a4ffb7 | 1784 | return; |
64f3e71c | 1785 | } |
3991912e | 1786 | |
d119f34c | 1787 | /* Analyze all loads and stores in STMT. */ |
09a4ffb7 | 1788 | walk_stmt_load_store_ops (stmt, this, |
d119f34c | 1789 | analyze_load, analyze_store); |
d119f34c JH |
1790 | |
1791 | switch (gimple_code (stmt)) | |
1792 | { | |
1793 | case GIMPLE_ASM: | |
a34edf9a | 1794 | if (gimple_asm_volatile_p (as_a <gasm *> (stmt))) |
09a4ffb7 | 1795 | set_nondeterministic (); |
a34edf9a JH |
1796 | if (cfun->can_throw_non_call_exceptions |
1797 | && stmt_could_throw_p (cfun, stmt)) | |
09a4ffb7 | 1798 | set_side_effects (); |
d119f34c JH |
1799 | /* If the ASM statement does not read nor write memory, there's nothing |
1800 | to do. Otherwise just give up. */ | |
1801 | if (!gimple_asm_clobbers_memory_p (as_a <gasm *> (stmt))) | |
09a4ffb7 | 1802 | return; |
d119f34c JH |
1803 | if (dump_file) |
1804 | fprintf (dump_file, " - Function contains GIMPLE_ASM statement " | |
1805 | "which clobbers memory.\n"); | |
09a4ffb7 JH |
1806 | record_unknown_load (); |
1807 | record_unknown_store (); | |
1808 | return; | |
d119f34c | 1809 | case GIMPLE_CALL: |
09a4ffb7 JH |
1810 | if (!m_ipa || gimple_call_internal_p (stmt)) |
1811 | analyze_call (as_a <gcall *> (stmt)); | |
6cef01c3 | 1812 | else |
09a4ffb7 JH |
1813 | { |
1814 | attr_fnspec fnspec = gimple_call_fnspec (as_a <gcall *>(stmt)); | |
1815 | ||
1816 | if (fnspec.known_p () | |
1817 | && (!fnspec.global_memory_read_p () | |
1818 | || !fnspec.global_memory_written_p ())) | |
1819 | { | |
1820 | cgraph_edge *e = cgraph_node::get | |
1821 | (current_function_decl)->get_edge (stmt); | |
1822 | if (e->callee) | |
1823 | { | |
1824 | fnspec_summaries->get_create (e)->fnspec | |
1825 | = xstrdup (fnspec.get_str ()); | |
1826 | if (dump_file) | |
1827 | fprintf (dump_file, " Recorded fnspec %s\n", | |
1828 | fnspec.get_str ()); | |
1829 | } | |
1830 | } | |
1831 | } | |
1832 | return; | |
d119f34c | 1833 | default: |
992644c3 JH |
1834 | if (cfun->can_throw_non_call_exceptions |
1835 | && stmt_could_throw_p (cfun, stmt)) | |
09a4ffb7 JH |
1836 | set_side_effects (); |
1837 | return; | |
d119f34c JH |
1838 | } |
1839 | } | |
1840 | ||
02c80893 | 1841 | /* Propagate load/stores across recursive calls. */ |
71dbabcc | 1842 | |
09a4ffb7 JH |
1843 | void |
1844 | modref_access_analysis::propagate () | |
71dbabcc | 1845 | { |
09a4ffb7 JH |
1846 | if (m_ipa && m_summary) |
1847 | return; | |
1848 | ||
1849 | bool changed = true; | |
1850 | bool first = true; | |
71dbabcc | 1851 | cgraph_node *fnode = cgraph_node::get (current_function_decl); |
09a4ffb7 JH |
1852 | |
1853 | m_always_executed = false; | |
1854 | while (changed && m_summary->useful_p (m_ecf_flags, false)) | |
71dbabcc | 1855 | { |
09a4ffb7 JH |
1856 | changed = false; |
1857 | for (unsigned i = 0; i < m_recursive_calls.length (); i++) | |
1858 | { | |
1859 | changed |= merge_call_side_effects (m_recursive_calls[i], m_summary, | |
1860 | fnode, !first); | |
1861 | } | |
1862 | first = false; | |
1863 | } | |
1864 | } | |
1865 | ||
1866 | /* Analyze function. */ | |
1867 | ||
1868 | void | |
1869 | modref_access_analysis::analyze () | |
1870 | { | |
1871 | m_ecf_flags = flags_from_decl_or_type (current_function_decl); | |
1872 | bool summary_useful = true; | |
1873 | ||
1874 | /* Analyze each statement in each basic block of the function. If the | |
1875 | statement cannot be analyzed (for any reason), the entire function cannot | |
1876 | be analyzed by modref. */ | |
1877 | basic_block bb; | |
1878 | FOR_EACH_BB_FN (bb, cfun) | |
1879 | { | |
1880 | gimple_stmt_iterator si; | |
1881 | bool always_executed | |
1882 | = bb == single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun))->dest; | |
1883 | ||
1884 | for (si = gsi_start_nondebug_after_labels_bb (bb); | |
1885 | !gsi_end_p (si); gsi_next_nondebug (&si)) | |
1886 | { | |
e93809f6 | 1887 | /* NULL memory accesses terminates BB. These accesses are known |
02c80893 | 1888 | to trip undefined behavior. gimple-ssa-isolate-paths turns them |
e93809f6 JH |
1889 | to volatile accesses and adds builtin_trap call which would |
1890 | confuse us otherwise. */ | |
1891 | if (infer_nonnull_range_by_dereference (gsi_stmt (si), | |
1892 | null_pointer_node)) | |
1893 | { | |
1894 | if (dump_file) | |
1895 | fprintf (dump_file, " - NULL memory access; terminating BB\n"); | |
1896 | if (flag_non_call_exceptions) | |
1897 | set_side_effects (); | |
1898 | break; | |
1899 | } | |
09a4ffb7 JH |
1900 | analyze_stmt (gsi_stmt (si), always_executed); |
1901 | ||
02c80893 | 1902 | /* Avoid doing useless work. */ |
09a4ffb7 JH |
1903 | if ((!m_summary || !m_summary->useful_p (m_ecf_flags, false)) |
1904 | && (!m_summary_lto | |
1905 | || !m_summary_lto->useful_p (m_ecf_flags, false))) | |
1906 | { | |
1907 | summary_useful = false; | |
1908 | break; | |
1909 | } | |
1910 | if (always_executed | |
1911 | && stmt_can_throw_external (cfun, gsi_stmt (si))) | |
1912 | always_executed = false; | |
1913 | } | |
1914 | if (!summary_useful) | |
1915 | break; | |
1916 | } | |
02c80893 | 1917 | /* In non-IPA mode we need to perform iterative dataflow on recursive calls. |
09a4ffb7 JH |
1918 | This needs to be done after all other side effects are computed. */ |
1919 | if (summary_useful) | |
1920 | { | |
1921 | if (!m_ipa) | |
1922 | propagate (); | |
1923 | if (m_summary && !m_summary->side_effects && !finite_function_p ()) | |
1924 | m_summary->side_effects = true; | |
1925 | if (m_summary_lto && !m_summary_lto->side_effects | |
1926 | && !finite_function_p ()) | |
1927 | m_summary_lto->side_effects = true; | |
71dbabcc | 1928 | } |
71dbabcc JH |
1929 | } |
1930 | ||
520d5ad3 JH |
1931 | /* Return true if OP accesses memory pointed to by SSA_NAME. */ |
1932 | ||
1933 | bool | |
1934 | memory_access_to (tree op, tree ssa_name) | |
1935 | { | |
1936 | tree base = get_base_address (op); | |
1937 | if (!base) | |
1938 | return false; | |
1939 | if (TREE_CODE (base) != MEM_REF && TREE_CODE (base) != TARGET_MEM_REF) | |
1940 | return false; | |
1941 | return TREE_OPERAND (base, 0) == ssa_name; | |
1942 | } | |
1943 | ||
1944 | /* Consider statement val = *arg. | |
1945 | return EAF flags of ARG that can be determined from EAF flags of VAL | |
1946 | (which are known to be FLAGS). If IGNORE_STORES is true we can ignore | |
1947 | all stores to VAL, i.e. when handling noreturn function. */ | |
1948 | ||
1949 | static int | |
1950 | deref_flags (int flags, bool ignore_stores) | |
1951 | { | |
d70ef656 JH |
1952 | /* Dereference is also a direct read but dereferenced value does not |
1953 | yield any other direct use. */ | |
1954 | int ret = EAF_NO_DIRECT_CLOBBER | EAF_NO_DIRECT_ESCAPE | |
1955 | | EAF_NOT_RETURNED_DIRECTLY; | |
4341b1b1 JH |
1956 | /* If argument is unused just account for |
1957 | the read involved in dereference. */ | |
520d5ad3 | 1958 | if (flags & EAF_UNUSED) |
d70ef656 JH |
1959 | ret |= EAF_NO_INDIRECT_READ | EAF_NO_INDIRECT_CLOBBER |
1960 | | EAF_NO_INDIRECT_ESCAPE; | |
520d5ad3 JH |
1961 | else |
1962 | { | |
d70ef656 JH |
1963 | /* Direct or indirect accesses leads to indirect accesses. */ |
1964 | if (((flags & EAF_NO_DIRECT_CLOBBER) | |
1965 | && (flags & EAF_NO_INDIRECT_CLOBBER)) | |
1966 | || ignore_stores) | |
1967 | ret |= EAF_NO_INDIRECT_CLOBBER; | |
1968 | if (((flags & EAF_NO_DIRECT_ESCAPE) | |
1969 | && (flags & EAF_NO_INDIRECT_ESCAPE)) | |
1970 | || ignore_stores) | |
1971 | ret |= EAF_NO_INDIRECT_ESCAPE; | |
1972 | if ((flags & EAF_NO_DIRECT_READ) | |
1973 | && (flags & EAF_NO_INDIRECT_READ)) | |
1974 | ret |= EAF_NO_INDIRECT_READ; | |
1975 | if ((flags & EAF_NOT_RETURNED_DIRECTLY) | |
1976 | && (flags & EAF_NOT_RETURNED_INDIRECTLY)) | |
1977 | ret |= EAF_NOT_RETURNED_INDIRECTLY; | |
520d5ad3 JH |
1978 | } |
1979 | return ret; | |
1980 | } | |
1981 | ||
85ebbabd | 1982 | |
09a4ffb7 JH |
1983 | /* Description of an escape point: a call which affects flags of a given |
1984 | SSA name. */ | |
85ebbabd JH |
1985 | |
1986 | struct escape_point | |
1987 | { | |
1988 | /* Value escapes to this call. */ | |
1989 | gcall *call; | |
1990 | /* Argument it escapes to. */ | |
1991 | int arg; | |
1992 | /* Flags already known about the argument (this can save us from recording | |
02c80893 | 1993 | escape points if local analysis did good job already). */ |
8da8ed43 | 1994 | eaf_flags_t min_flags; |
02c80893 | 1995 | /* Does value escape directly or indirectly? */ |
85ebbabd JH |
1996 | bool direct; |
1997 | }; | |
1998 | ||
02c80893 | 1999 | /* Lattice used during the eaf flags analysis dataflow. For a given SSA name |
09a4ffb7 JH |
2000 | we aim to compute its flags and escape points. We also use the lattice |
2001 | to dynamically build dataflow graph to propagate on. */ | |
2002 | ||
85ebbabd JH |
2003 | class modref_lattice |
2004 | { | |
2005 | public: | |
2006 | /* EAF flags of the SSA name. */ | |
4341b1b1 | 2007 | eaf_flags_t flags; |
4898e958 JH |
2008 | /* Used during DFS walk to mark names where final value was determined |
2009 | without need for dataflow. */ | |
85ebbabd | 2010 | bool known; |
4898e958 | 2011 | /* Used during DFS walk to mark open vertices (for cycle detection). */ |
85ebbabd | 2012 | bool open; |
4898e958 JH |
2013 | /* Set during DFS walk for names that needs dataflow propagation. */ |
2014 | bool do_dataflow; | |
2015 | /* Used during the iterative dataflow. */ | |
2016 | bool changed; | |
85ebbabd JH |
2017 | |
2018 | /* When doing IPA analysis we can not merge in callee escape points; | |
2019 | Only remember them and do the merging at IPA propagation time. */ | |
2020 | vec <escape_point, va_heap, vl_ptr> escape_points; | |
2021 | ||
02c80893 | 2022 | /* Representation of a graph for dataflow. This graph is built on-demand |
4898e958 JH |
2023 | using modref_eaf_analysis::analyze_ssa and later solved by |
2024 | modref_eaf_analysis::propagate. | |
2025 | Each edge represents the fact that flags of current lattice should be | |
2026 | propagated to lattice of SSA_NAME. */ | |
2027 | struct propagate_edge | |
2028 | { | |
2029 | int ssa_name; | |
2030 | bool deref; | |
2031 | }; | |
2032 | vec <propagate_edge, va_heap, vl_ptr> propagate_to; | |
2033 | ||
85ebbabd JH |
2034 | void init (); |
2035 | void release (); | |
2036 | bool merge (const modref_lattice &with); | |
2037 | bool merge (int flags); | |
2038 | bool merge_deref (const modref_lattice &with, bool ignore_stores); | |
2039 | bool merge_direct_load (); | |
2040 | bool merge_direct_store (); | |
2041 | bool add_escape_point (gcall *call, int arg, int min_flags, bool diret); | |
2042 | void dump (FILE *out, int indent = 0) const; | |
2043 | }; | |
2044 | ||
2045 | /* Lattices are saved to vectors, so keep them PODs. */ | |
2046 | void | |
2047 | modref_lattice::init () | |
2048 | { | |
4341b1b1 | 2049 | /* All flags we track. */ |
d70ef656 JH |
2050 | int f = EAF_NO_DIRECT_CLOBBER | EAF_NO_INDIRECT_CLOBBER |
2051 | | EAF_NO_DIRECT_ESCAPE | EAF_NO_INDIRECT_ESCAPE | |
2052 | | EAF_NO_DIRECT_READ | EAF_NO_INDIRECT_READ | |
2053 | | EAF_NOT_RETURNED_DIRECTLY | EAF_NOT_RETURNED_INDIRECTLY | |
2054 | | EAF_UNUSED; | |
4341b1b1 JH |
2055 | flags = f; |
2056 | /* Check that eaf_flags_t is wide enough to hold all flags. */ | |
2057 | gcc_checking_assert (f == flags); | |
85ebbabd JH |
2058 | open = true; |
2059 | known = false; | |
2060 | } | |
2061 | ||
2062 | /* Release memory. */ | |
2063 | void | |
2064 | modref_lattice::release () | |
2065 | { | |
2066 | escape_points.release (); | |
4898e958 | 2067 | propagate_to.release (); |
85ebbabd JH |
2068 | } |
2069 | ||
2070 | /* Dump lattice to OUT; indent with INDENT spaces. */ | |
2071 | ||
2072 | void | |
2073 | modref_lattice::dump (FILE *out, int indent) const | |
2074 | { | |
2075 | dump_eaf_flags (out, flags); | |
2076 | if (escape_points.length ()) | |
2077 | { | |
2078 | fprintf (out, "%*sEscapes:\n", indent, ""); | |
2079 | for (unsigned int i = 0; i < escape_points.length (); i++) | |
2080 | { | |
2081 | fprintf (out, "%*s Arg %i (%s) min flags", indent, "", | |
2082 | escape_points[i].arg, | |
2083 | escape_points[i].direct ? "direct" : "indirect"); | |
9851a163 | 2084 | dump_eaf_flags (out, escape_points[i].min_flags, false); |
85ebbabd JH |
2085 | fprintf (out, " in call "); |
2086 | print_gimple_stmt (out, escape_points[i].call, 0); | |
2087 | } | |
2088 | } | |
2089 | } | |
2090 | ||
2091 | /* Add escape point CALL, ARG, MIN_FLAGS, DIRECT. Return false if such escape | |
2092 | point exists. */ | |
2093 | ||
2094 | bool | |
2095 | modref_lattice::add_escape_point (gcall *call, int arg, int min_flags, | |
2096 | bool direct) | |
2097 | { | |
2098 | escape_point *ep; | |
2099 | unsigned int i; | |
2100 | ||
2101 | /* If we already determined flags to be bad enough, | |
4341b1b1 JH |
2102 | we do not need to record. */ |
2103 | if ((flags & min_flags) == flags || (min_flags & EAF_UNUSED)) | |
85ebbabd JH |
2104 | return false; |
2105 | ||
2106 | FOR_EACH_VEC_ELT (escape_points, i, ep) | |
2107 | if (ep->call == call && ep->arg == arg && ep->direct == direct) | |
2108 | { | |
2109 | if ((ep->min_flags & min_flags) == min_flags) | |
2110 | return false; | |
2111 | ep->min_flags &= min_flags; | |
2112 | return true; | |
2113 | } | |
2114 | /* Give up if max escape points is met. */ | |
2115 | if ((int)escape_points.length () > param_modref_max_escape_points) | |
2116 | { | |
2117 | if (dump_file) | |
2118 | fprintf (dump_file, "--param modref-max-escape-points limit reached\n"); | |
2119 | merge (0); | |
2120 | return true; | |
2121 | } | |
2122 | escape_point new_ep = {call, arg, min_flags, direct}; | |
2123 | escape_points.safe_push (new_ep); | |
2124 | return true; | |
2125 | } | |
2126 | ||
2127 | /* Merge in flags from F. */ | |
2128 | bool | |
2129 | modref_lattice::merge (int f) | |
2130 | { | |
3350e59f JH |
2131 | if (f & EAF_UNUSED) |
2132 | return false; | |
4526ec20 JH |
2133 | /* Check that flags seems sane: if function does not read the parameter |
2134 | it can not access it indirectly. */ | |
2135 | gcc_checking_assert (!(f & EAF_NO_DIRECT_READ) | |
2136 | || ((f & EAF_NO_INDIRECT_READ) | |
2137 | && (f & EAF_NO_INDIRECT_CLOBBER) | |
2138 | && (f & EAF_NO_INDIRECT_ESCAPE) | |
2139 | && (f & EAF_NOT_RETURNED_INDIRECTLY))); | |
85ebbabd JH |
2140 | if ((flags & f) != flags) |
2141 | { | |
2142 | flags &= f; | |
02c80893 | 2143 | /* Prune obviously useless flags; |
4341b1b1 JH |
2144 | We do not have ECF_FLAGS handy which is not big problem since |
2145 | we will do final flags cleanup before producing summary. | |
2146 | Merging should be fast so it can work well with dataflow. */ | |
2147 | flags = remove_useless_eaf_flags (flags, 0, false); | |
85ebbabd JH |
2148 | if (!flags) |
2149 | escape_points.release (); | |
2150 | return true; | |
2151 | } | |
2152 | return false; | |
2153 | } | |
2154 | ||
02c80893 | 2155 | /* Merge in WITH. Return true if anything changed. */ |
85ebbabd JH |
2156 | |
2157 | bool | |
2158 | modref_lattice::merge (const modref_lattice &with) | |
2159 | { | |
2160 | if (!with.known) | |
4898e958 | 2161 | do_dataflow = true; |
85ebbabd JH |
2162 | |
2163 | bool changed = merge (with.flags); | |
2164 | ||
2165 | if (!flags) | |
2166 | return changed; | |
2167 | for (unsigned int i = 0; i < with.escape_points.length (); i++) | |
2168 | changed |= add_escape_point (with.escape_points[i].call, | |
2169 | with.escape_points[i].arg, | |
2170 | with.escape_points[i].min_flags, | |
2171 | with.escape_points[i].direct); | |
2172 | return changed; | |
2173 | } | |
2174 | ||
2175 | /* Merge in deref of WITH. If IGNORE_STORES is true do not consider | |
02c80893 | 2176 | stores. Return true if anything changed. */ |
85ebbabd JH |
2177 | |
2178 | bool | |
2179 | modref_lattice::merge_deref (const modref_lattice &with, bool ignore_stores) | |
2180 | { | |
2181 | if (!with.known) | |
4898e958 | 2182 | do_dataflow = true; |
85ebbabd JH |
2183 | |
2184 | bool changed = merge (deref_flags (with.flags, ignore_stores)); | |
2185 | ||
2186 | if (!flags) | |
2187 | return changed; | |
2188 | for (unsigned int i = 0; i < with.escape_points.length (); i++) | |
9851a163 JH |
2189 | { |
2190 | int min_flags = with.escape_points[i].min_flags; | |
2191 | ||
2192 | if (with.escape_points[i].direct) | |
2193 | min_flags = deref_flags (min_flags, ignore_stores); | |
2194 | else if (ignore_stores) | |
4341b1b1 | 2195 | min_flags |= ignore_stores_eaf_flags; |
9851a163 JH |
2196 | changed |= add_escape_point (with.escape_points[i].call, |
2197 | with.escape_points[i].arg, | |
2198 | min_flags, | |
2199 | false); | |
2200 | } | |
85ebbabd JH |
2201 | return changed; |
2202 | } | |
2203 | ||
2204 | /* Merge in flags for direct load. */ | |
2205 | ||
2206 | bool | |
2207 | modref_lattice::merge_direct_load () | |
2208 | { | |
d70ef656 | 2209 | return merge (~(EAF_UNUSED | EAF_NO_DIRECT_READ)); |
85ebbabd JH |
2210 | } |
2211 | ||
2212 | /* Merge in flags for direct store. */ | |
2213 | ||
2214 | bool | |
2215 | modref_lattice::merge_direct_store () | |
2216 | { | |
d70ef656 | 2217 | return merge (~(EAF_UNUSED | EAF_NO_DIRECT_CLOBBER)); |
85ebbabd JH |
2218 | } |
2219 | ||
4898e958 | 2220 | /* Analyzer of EAF flags. |
02c80893 | 2221 | This is generally dataflow problem over the SSA graph, however we only |
4898e958 JH |
2222 | care about flags of few selected ssa names (arguments, return slot and |
2223 | static chain). So we first call analyze_ssa_name on all relevant names | |
2224 | and perform a DFS walk to discover SSA names where flags needs to be | |
2225 | determined. For acyclic graphs we try to determine final flags during | |
02c80893 | 2226 | this walk. Once cycles or recursion depth is met we enlist SSA names |
4898e958 JH |
2227 | for dataflow which is done by propagate call. |
2228 | ||
2229 | After propagation the flags can be obtained using get_ssa_name_flags. */ | |
18f0873d JH |
2230 | |
2231 | class modref_eaf_analysis | |
2232 | { | |
2233 | public: | |
4898e958 | 2234 | /* Mark NAME as relevant for analysis. */ |
8d1e342b | 2235 | void analyze_ssa_name (tree name, bool deferred = false); |
02c80893 | 2236 | /* Dataflow solver. */ |
4898e958 | 2237 | void propagate (); |
18f0873d JH |
2238 | /* Return flags computed earlier for NAME. */ |
2239 | int get_ssa_name_flags (tree name) | |
2240 | { | |
2241 | int version = SSA_NAME_VERSION (name); | |
2242 | gcc_checking_assert (m_lattice[version].known); | |
2243 | return m_lattice[version].flags; | |
2244 | } | |
2245 | /* In IPA mode this will record all escape points | |
2246 | determined for NAME to PARM_IDNEX. Flags are minimal | |
2247 | flags known. */ | |
2248 | void record_escape_points (tree name, int parm_index, int flags); | |
2249 | modref_eaf_analysis (bool ipa) | |
2250 | { | |
2251 | m_ipa = ipa; | |
2252 | m_depth = 0; | |
2253 | m_lattice.safe_grow_cleared (num_ssa_names, true); | |
2254 | } | |
2255 | ~modref_eaf_analysis () | |
2256 | { | |
2257 | gcc_checking_assert (!m_depth); | |
4898e958 | 2258 | if (m_ipa || m_names_to_propagate.length ()) |
18f0873d JH |
2259 | for (unsigned int i = 0; i < num_ssa_names; i++) |
2260 | m_lattice[i].release (); | |
2261 | } | |
2262 | private: | |
02c80893 | 2263 | /* If true, we produce analysis for IPA mode. In this case escape points are |
18f0873d JH |
2264 | collected. */ |
2265 | bool m_ipa; | |
2266 | /* Depth of recursion of analyze_ssa_name. */ | |
2267 | int m_depth; | |
2268 | /* Propagation lattice for individual ssa names. */ | |
2269 | auto_vec<modref_lattice> m_lattice; | |
4898e958 JH |
2270 | auto_vec<tree> m_deferred_names; |
2271 | auto_vec<int> m_names_to_propagate; | |
18f0873d JH |
2272 | |
2273 | void merge_with_ssa_name (tree dest, tree src, bool deref); | |
d70ef656 JH |
2274 | void merge_call_lhs_flags (gcall *call, int arg, tree name, bool direct, |
2275 | bool deref); | |
18f0873d | 2276 | }; |
85ebbabd | 2277 | |
85ebbabd | 2278 | |
02c80893 | 2279 | /* Call statements may return their parameters. Consider argument number |
520d5ad3 JH |
2280 | ARG of USE_STMT and determine flags that can needs to be cleared |
2281 | in case pointer possibly indirectly references from ARG I is returned. | |
d70ef656 JH |
2282 | If DIRECT is true consider direct returns and if INDIRECT consider |
2283 | indirect returns. | |
62af7d94 JH |
2284 | LATTICE, DEPTH and ipa are same as in analyze_ssa_name. |
2285 | ARG is set to -1 for static chain. */ | |
520d5ad3 | 2286 | |
18f0873d JH |
2287 | void |
2288 | modref_eaf_analysis::merge_call_lhs_flags (gcall *call, int arg, | |
d70ef656 JH |
2289 | tree name, bool direct, |
2290 | bool indirect) | |
520d5ad3 | 2291 | { |
18f0873d | 2292 | int index = SSA_NAME_VERSION (name); |
c331a75d | 2293 | bool returned_directly = false; |
d70ef656 | 2294 | |
520d5ad3 JH |
2295 | /* If there is no return value, no flags are affected. */ |
2296 | if (!gimple_call_lhs (call)) | |
85ebbabd | 2297 | return; |
520d5ad3 JH |
2298 | |
2299 | /* If we know that function returns given argument and it is not ARG | |
2300 | we can still be happy. */ | |
62af7d94 JH |
2301 | if (arg >= 0) |
2302 | { | |
2303 | int flags = gimple_call_return_flags (call); | |
c331a75d JH |
2304 | if (flags & ERF_RETURNS_ARG) |
2305 | { | |
2306 | if ((flags & ERF_RETURN_ARG_MASK) == arg) | |
2307 | returned_directly = true; | |
2308 | else | |
2309 | return; | |
2310 | } | |
2311 | } | |
2312 | /* Make ERF_RETURNS_ARG overwrite EAF_UNUSED. */ | |
2313 | if (returned_directly) | |
2314 | { | |
2315 | direct = true; | |
2316 | indirect = false; | |
62af7d94 | 2317 | } |
c331a75d JH |
2318 | /* If value is not returned at all, do nothing. */ |
2319 | else if (!direct && !indirect) | |
2320 | return; | |
8da8ed43 | 2321 | |
520d5ad3 JH |
2322 | /* If return value is SSA name determine its flags. */ |
2323 | if (TREE_CODE (gimple_call_lhs (call)) == SSA_NAME) | |
85ebbabd JH |
2324 | { |
2325 | tree lhs = gimple_call_lhs (call); | |
d70ef656 JH |
2326 | if (direct) |
2327 | merge_with_ssa_name (name, lhs, false); | |
2328 | if (indirect) | |
2329 | merge_with_ssa_name (name, lhs, true); | |
85ebbabd | 2330 | } |
520d5ad3 | 2331 | /* In the case of memory store we can do nothing. */ |
d70ef656 | 2332 | else if (!direct) |
18f0873d | 2333 | m_lattice[index].merge (deref_flags (0, false)); |
520d5ad3 | 2334 | else |
18f0873d | 2335 | m_lattice[index].merge (0); |
520d5ad3 JH |
2336 | } |
2337 | ||
62af7d94 JH |
2338 | /* CALL_FLAGS are EAF_FLAGS of the argument. Turn them |
2339 | into flags for caller, update LATTICE of corresponding | |
2340 | argument if needed. */ | |
2341 | ||
2342 | static int | |
2343 | callee_to_caller_flags (int call_flags, bool ignore_stores, | |
2344 | modref_lattice &lattice) | |
2345 | { | |
2346 | /* call_flags is about callee returning a value | |
2347 | that is not the same as caller returning it. */ | |
d70ef656 JH |
2348 | call_flags |= EAF_NOT_RETURNED_DIRECTLY |
2349 | | EAF_NOT_RETURNED_INDIRECTLY; | |
62af7d94 JH |
2350 | if (!ignore_stores && !(call_flags & EAF_UNUSED)) |
2351 | { | |
2f3d43a3 JH |
2352 | /* If value escapes we are no longer able to track what happens |
2353 | with it because we can read it from the escaped location | |
2354 | anytime. */ | |
d70ef656 | 2355 | if (!(call_flags & EAF_NO_DIRECT_ESCAPE)) |
2f3d43a3 JH |
2356 | lattice.merge (0); |
2357 | else if (!(call_flags & EAF_NO_INDIRECT_ESCAPE)) | |
d70ef656 | 2358 | lattice.merge (~(EAF_NOT_RETURNED_INDIRECTLY |
4526ec20 | 2359 | | EAF_NO_DIRECT_READ |
2f3d43a3 JH |
2360 | | EAF_NO_INDIRECT_READ |
2361 | | EAF_NO_INDIRECT_CLOBBER | |
62af7d94 JH |
2362 | | EAF_UNUSED)); |
2363 | } | |
2364 | else | |
2365 | call_flags |= ignore_stores_eaf_flags; | |
2366 | return call_flags; | |
2367 | } | |
2368 | ||
85ebbabd JH |
2369 | /* Analyze EAF flags for SSA name NAME and store result to LATTICE. |
2370 | LATTICE is an array of modref_lattices. | |
2371 | DEPTH is a recursion depth used to make debug output prettier. | |
2372 | If IPA is true we analyze for IPA propagation (and thus call escape points | |
2373 | are processed later) */ | |
520d5ad3 | 2374 | |
18f0873d | 2375 | void |
8d1e342b | 2376 | modref_eaf_analysis::analyze_ssa_name (tree name, bool deferred) |
520d5ad3 JH |
2377 | { |
2378 | imm_use_iterator ui; | |
2379 | gimple *use_stmt; | |
85ebbabd | 2380 | int index = SSA_NAME_VERSION (name); |
520d5ad3 | 2381 | |
8d1e342b | 2382 | if (!deferred) |
520d5ad3 | 2383 | { |
8d1e342b JH |
2384 | /* See if value is already computed. */ |
2385 | if (m_lattice[index].known || m_lattice[index].do_dataflow) | |
2386 | return; | |
2387 | if (m_lattice[index].open) | |
2388 | { | |
2389 | if (dump_file) | |
2390 | fprintf (dump_file, | |
2391 | "%*sCycle in SSA graph\n", | |
2392 | m_depth * 4, ""); | |
2393 | return; | |
2394 | } | |
2395 | /* Recursion guard. */ | |
2396 | m_lattice[index].init (); | |
2397 | if (m_depth == param_modref_max_depth) | |
2398 | { | |
2399 | if (dump_file) | |
2400 | fprintf (dump_file, | |
2401 | "%*sMax recursion depth reached; postponing\n", | |
2402 | m_depth * 4, ""); | |
2403 | m_deferred_names.safe_push (name); | |
2404 | return; | |
2405 | } | |
520d5ad3 | 2406 | } |
520d5ad3 JH |
2407 | |
2408 | if (dump_file) | |
2409 | { | |
2410 | fprintf (dump_file, | |
18f0873d | 2411 | "%*sAnalyzing flags of ssa name: ", m_depth * 4, ""); |
520d5ad3 JH |
2412 | print_generic_expr (dump_file, name); |
2413 | fprintf (dump_file, "\n"); | |
2414 | } | |
2415 | ||
2416 | FOR_EACH_IMM_USE_STMT (use_stmt, ui, name) | |
2417 | { | |
18f0873d | 2418 | if (m_lattice[index].flags == 0) |
640296c3 | 2419 | break; |
520d5ad3 JH |
2420 | if (is_gimple_debug (use_stmt)) |
2421 | continue; | |
2422 | if (dump_file) | |
2423 | { | |
18f0873d | 2424 | fprintf (dump_file, "%*s Analyzing stmt: ", m_depth * 4, ""); |
520d5ad3 JH |
2425 | print_gimple_stmt (dump_file, use_stmt, 0); |
2426 | } | |
4341b1b1 | 2427 | /* If we see a direct non-debug use, clear unused bit. |
02c80893 | 2428 | All dereferences should be accounted below using deref_flags. */ |
18f0873d | 2429 | m_lattice[index].merge (~EAF_UNUSED); |
520d5ad3 | 2430 | |
26285af4 | 2431 | /* Gimple return may load the return value. |
e53b6e56 | 2432 | Returning name counts as an use by tree-ssa-structalias.cc */ |
520d5ad3 JH |
2433 | if (greturn *ret = dyn_cast <greturn *> (use_stmt)) |
2434 | { | |
b8ef019a JH |
2435 | /* Returning through return slot is seen as memory write earlier. */ |
2436 | if (DECL_RESULT (current_function_decl) | |
2437 | && DECL_BY_REFERENCE (DECL_RESULT (current_function_decl))) | |
2438 | ; | |
2439 | else if (gimple_return_retval (ret) == name) | |
d70ef656 | 2440 | m_lattice[index].merge (~(EAF_UNUSED | EAF_NOT_RETURNED_DIRECTLY |
18f0873d | 2441 | | EAF_NOT_RETURNED_DIRECTLY)); |
85ebbabd | 2442 | else if (memory_access_to (gimple_return_retval (ret), name)) |
8da8ed43 | 2443 | { |
18f0873d | 2444 | m_lattice[index].merge_direct_load (); |
d70ef656 JH |
2445 | m_lattice[index].merge (~(EAF_UNUSED |
2446 | | EAF_NOT_RETURNED_INDIRECTLY)); | |
8da8ed43 | 2447 | } |
520d5ad3 JH |
2448 | } |
2449 | /* Account for LHS store, arg loads and flags from callee function. */ | |
2450 | else if (gcall *call = dyn_cast <gcall *> (use_stmt)) | |
2451 | { | |
2452 | tree callee = gimple_call_fndecl (call); | |
9b08f776 JH |
2453 | |
2454 | /* IPA PTA internally it treats calling a function as "writing" to | |
2455 | the argument space of all functions the function pointer points to | |
2456 | (PR101949). We can not drop EAF_NOCLOBBER only when ipa-pta | |
2457 | is on since that would allow propagation of this from -fno-ipa-pta | |
2458 | to -fipa-pta functions. */ | |
2459 | if (gimple_call_fn (use_stmt) == name) | |
d70ef656 | 2460 | m_lattice[index].merge (~(EAF_NO_DIRECT_CLOBBER | EAF_UNUSED)); |
9b08f776 | 2461 | |
520d5ad3 | 2462 | /* Recursion would require bit of propagation; give up for now. */ |
18f0873d | 2463 | if (callee && !m_ipa && recursive_call_p (current_function_decl, |
85ebbabd | 2464 | callee)) |
18f0873d | 2465 | m_lattice[index].merge (0); |
520d5ad3 JH |
2466 | else |
2467 | { | |
2468 | int ecf_flags = gimple_call_flags (call); | |
2469 | bool ignore_stores = ignore_stores_p (current_function_decl, | |
2470 | ecf_flags); | |
85ebbabd JH |
2471 | bool ignore_retval = ignore_retval_p (current_function_decl, |
2472 | ecf_flags); | |
520d5ad3 JH |
2473 | |
2474 | /* Handle *name = func (...). */ | |
2475 | if (gimple_call_lhs (call) | |
2476 | && memory_access_to (gimple_call_lhs (call), name)) | |
59f38935 | 2477 | { |
18f0873d | 2478 | m_lattice[index].merge_direct_store (); |
59f38935 JH |
2479 | /* Return slot optimization passes address of |
2480 | LHS to callee via hidden parameter and this | |
2481 | may make LHS to escape. See PR 98499. */ | |
2482 | if (gimple_call_return_slot_opt_p (call) | |
2483 | && TREE_ADDRESSABLE (TREE_TYPE (gimple_call_lhs (call)))) | |
62af7d94 JH |
2484 | { |
2485 | int call_flags = gimple_call_retslot_flags (call); | |
2486 | bool isretslot = false; | |
2487 | ||
2488 | if (DECL_RESULT (current_function_decl) | |
2489 | && DECL_BY_REFERENCE | |
2490 | (DECL_RESULT (current_function_decl))) | |
2491 | isretslot = ssa_default_def | |
2492 | (cfun, | |
2493 | DECL_RESULT (current_function_decl)) | |
2494 | == name; | |
2495 | ||
2496 | /* Passing returnslot to return slot is special because | |
2497 | not_returned and escape has same meaning. | |
2498 | However passing arg to return slot is different. If | |
2499 | the callee's return slot is returned it means that | |
2f3d43a3 JH |
2500 | arg is written to itself which is an escape. |
2501 | Since we do not track the memory it is written to we | |
02c80893 | 2502 | need to give up on analyzing it. */ |
62af7d94 JH |
2503 | if (!isretslot) |
2504 | { | |
62af7d94 | 2505 | if (!(call_flags & (EAF_NOT_RETURNED_DIRECTLY |
d70ef656 | 2506 | | EAF_UNUSED))) |
2f3d43a3 JH |
2507 | m_lattice[index].merge (0); |
2508 | else gcc_checking_assert | |
2509 | (call_flags & (EAF_NOT_RETURNED_INDIRECTLY | |
2510 | | EAF_UNUSED)); | |
62af7d94 JH |
2511 | call_flags = callee_to_caller_flags |
2512 | (call_flags, false, | |
2513 | m_lattice[index]); | |
2514 | } | |
2515 | m_lattice[index].merge (call_flags); | |
2516 | } | |
59f38935 | 2517 | } |
520d5ad3 | 2518 | |
520d5ad3 JH |
2519 | if (gimple_call_chain (call) |
2520 | && (gimple_call_chain (call) == name)) | |
62af7d94 JH |
2521 | { |
2522 | int call_flags = gimple_call_static_chain_flags (call); | |
d70ef656 JH |
2523 | if (!ignore_retval && !(call_flags & EAF_UNUSED)) |
2524 | merge_call_lhs_flags | |
2525 | (call, -1, name, | |
2526 | !(call_flags & EAF_NOT_RETURNED_DIRECTLY), | |
2527 | !(call_flags & EAF_NOT_RETURNED_INDIRECTLY)); | |
62af7d94 JH |
2528 | call_flags = callee_to_caller_flags |
2529 | (call_flags, ignore_stores, | |
2530 | m_lattice[index]); | |
2531 | if (!(ecf_flags & (ECF_CONST | ECF_NOVOPS))) | |
2532 | m_lattice[index].merge (call_flags); | |
2533 | } | |
85ebbabd JH |
2534 | |
2535 | /* Process internal functions and right away. */ | |
18f0873d | 2536 | bool record_ipa = m_ipa && !gimple_call_internal_p (call); |
520d5ad3 JH |
2537 | |
2538 | /* Handle all function parameters. */ | |
85ebbabd | 2539 | for (unsigned i = 0; |
18f0873d JH |
2540 | i < gimple_call_num_args (call) |
2541 | && m_lattice[index].flags; i++) | |
520d5ad3 JH |
2542 | /* Name is directly passed to the callee. */ |
2543 | if (gimple_call_arg (call, i) == name) | |
2544 | { | |
62af7d94 | 2545 | int call_flags = gimple_call_arg_flags (call, i); |
c331a75d | 2546 | if (!ignore_retval) |
62af7d94 JH |
2547 | merge_call_lhs_flags |
2548 | (call, i, name, | |
c331a75d JH |
2549 | !(call_flags & (EAF_NOT_RETURNED_DIRECTLY |
2550 | | EAF_UNUSED)), | |
2551 | !(call_flags & (EAF_NOT_RETURNED_INDIRECTLY | |
2552 | | EAF_UNUSED))); | |
85ebbabd | 2553 | if (!(ecf_flags & (ECF_CONST | ECF_NOVOPS))) |
520d5ad3 | 2554 | { |
62af7d94 JH |
2555 | call_flags = callee_to_caller_flags |
2556 | (call_flags, ignore_stores, | |
2557 | m_lattice[index]); | |
85ebbabd | 2558 | if (!record_ipa) |
18f0873d | 2559 | m_lattice[index].merge (call_flags); |
c3c61674 | 2560 | else |
18f0873d | 2561 | m_lattice[index].add_escape_point (call, i, |
b8ef019a | 2562 | call_flags, true); |
520d5ad3 JH |
2563 | } |
2564 | } | |
2565 | /* Name is dereferenced and passed to a callee. */ | |
2566 | else if (memory_access_to (gimple_call_arg (call, i), name)) | |
2567 | { | |
62af7d94 JH |
2568 | int call_flags = deref_flags |
2569 | (gimple_call_arg_flags (call, i), ignore_stores); | |
d70ef656 JH |
2570 | if (!ignore_retval && !(call_flags & EAF_UNUSED) |
2571 | && !(call_flags & EAF_NOT_RETURNED_DIRECTLY) | |
2572 | && !(call_flags & EAF_NOT_RETURNED_INDIRECTLY)) | |
2573 | merge_call_lhs_flags (call, i, name, false, true); | |
520d5ad3 | 2574 | if (ecf_flags & (ECF_CONST | ECF_NOVOPS)) |
18f0873d | 2575 | m_lattice[index].merge_direct_load (); |
520d5ad3 | 2576 | else |
85ebbabd | 2577 | { |
62af7d94 JH |
2578 | call_flags = callee_to_caller_flags |
2579 | (call_flags, ignore_stores, | |
2580 | m_lattice[index]); | |
85ebbabd | 2581 | if (!record_ipa) |
18f0873d | 2582 | m_lattice[index].merge (call_flags); |
c3c61674 | 2583 | else |
18f0873d | 2584 | m_lattice[index].add_escape_point (call, i, |
62af7d94 | 2585 | call_flags, false); |
85ebbabd | 2586 | } |
520d5ad3 JH |
2587 | } |
2588 | } | |
520d5ad3 JH |
2589 | } |
2590 | else if (gimple_assign_load_p (use_stmt)) | |
2591 | { | |
2592 | gassign *assign = as_a <gassign *> (use_stmt); | |
2593 | /* Memory to memory copy. */ | |
2594 | if (gimple_store_p (assign)) | |
2595 | { | |
520d5ad3 JH |
2596 | /* Handle *lhs = *name. |
2597 | ||
2598 | We do not track memory locations, so assume that value | |
2599 | is used arbitrarily. */ | |
2600 | if (memory_access_to (gimple_assign_rhs1 (assign), name)) | |
18f0873d | 2601 | m_lattice[index].merge (deref_flags (0, false)); |
85ebbabd JH |
2602 | /* Handle *name = *exp. */ |
2603 | else if (memory_access_to (gimple_assign_lhs (assign), name)) | |
18f0873d | 2604 | m_lattice[index].merge_direct_store (); |
520d5ad3 JH |
2605 | } |
2606 | /* Handle lhs = *name. */ | |
2607 | else if (memory_access_to (gimple_assign_rhs1 (assign), name)) | |
85ebbabd JH |
2608 | { |
2609 | tree lhs = gimple_assign_lhs (assign); | |
18f0873d | 2610 | merge_with_ssa_name (name, lhs, true); |
85ebbabd | 2611 | } |
520d5ad3 JH |
2612 | } |
2613 | else if (gimple_store_p (use_stmt)) | |
2614 | { | |
2615 | gassign *assign = dyn_cast <gassign *> (use_stmt); | |
2616 | ||
2617 | /* Handle *lhs = name. */ | |
2618 | if (assign && gimple_assign_rhs1 (assign) == name) | |
2619 | { | |
2620 | if (dump_file) | |
2621 | fprintf (dump_file, "%*s ssa name saved to memory\n", | |
18f0873d JH |
2622 | m_depth * 4, ""); |
2623 | m_lattice[index].merge (0); | |
520d5ad3 JH |
2624 | } |
2625 | /* Handle *name = exp. */ | |
2626 | else if (assign | |
2627 | && memory_access_to (gimple_assign_lhs (assign), name)) | |
0c9687d0 JH |
2628 | { |
2629 | /* In general we can not ignore clobbers because they are | |
2630 | barriers for code motion, however after inlining it is safe to | |
2631 | do because local optimization passes do not consider clobbers | |
18f0873d | 2632 | from other functions. |
e53b6e56 | 2633 | Similar logic is in ipa-pure-const.cc. */ |
0c9687d0 | 2634 | if (!cfun->after_inlining || !gimple_clobber_p (assign)) |
18f0873d | 2635 | m_lattice[index].merge_direct_store (); |
0c9687d0 | 2636 | } |
520d5ad3 JH |
2637 | /* ASM statements etc. */ |
2638 | else if (!assign) | |
2639 | { | |
2640 | if (dump_file) | |
18f0873d JH |
2641 | fprintf (dump_file, "%*s Unhandled store\n", m_depth * 4, ""); |
2642 | m_lattice[index].merge (0); | |
520d5ad3 JH |
2643 | } |
2644 | } | |
2645 | else if (gassign *assign = dyn_cast <gassign *> (use_stmt)) | |
2646 | { | |
2647 | enum tree_code code = gimple_assign_rhs_code (assign); | |
2648 | ||
2649 | /* See if operation is a merge as considered by | |
e53b6e56 | 2650 | tree-ssa-structalias.cc:find_func_aliases. */ |
520d5ad3 JH |
2651 | if (!truth_value_p (code) |
2652 | && code != POINTER_DIFF_EXPR | |
2653 | && (code != POINTER_PLUS_EXPR | |
2654 | || gimple_assign_rhs1 (assign) == name)) | |
85ebbabd JH |
2655 | { |
2656 | tree lhs = gimple_assign_lhs (assign); | |
18f0873d | 2657 | merge_with_ssa_name (name, lhs, false); |
85ebbabd | 2658 | } |
520d5ad3 JH |
2659 | } |
2660 | else if (gphi *phi = dyn_cast <gphi *> (use_stmt)) | |
2661 | { | |
85ebbabd | 2662 | tree result = gimple_phi_result (phi); |
18f0873d | 2663 | merge_with_ssa_name (name, result, false); |
520d5ad3 JH |
2664 | } |
2665 | /* Conditions are not considered escape points | |
2666 | by tree-ssa-structalias. */ | |
2667 | else if (gimple_code (use_stmt) == GIMPLE_COND) | |
2668 | ; | |
2669 | else | |
2670 | { | |
2671 | if (dump_file) | |
18f0873d JH |
2672 | fprintf (dump_file, "%*s Unhandled stmt\n", m_depth * 4, ""); |
2673 | m_lattice[index].merge (0); | |
520d5ad3 JH |
2674 | } |
2675 | ||
2676 | if (dump_file) | |
2677 | { | |
18f0873d | 2678 | fprintf (dump_file, "%*s current flags of ", m_depth * 4, ""); |
520d5ad3 | 2679 | print_generic_expr (dump_file, name); |
18f0873d | 2680 | m_lattice[index].dump (dump_file, m_depth * 4 + 4); |
520d5ad3 JH |
2681 | } |
2682 | } | |
2683 | if (dump_file) | |
2684 | { | |
18f0873d | 2685 | fprintf (dump_file, "%*sflags of ssa name ", m_depth * 4, ""); |
520d5ad3 | 2686 | print_generic_expr (dump_file, name); |
18f0873d | 2687 | m_lattice[index].dump (dump_file, m_depth * 4 + 2); |
520d5ad3 | 2688 | } |
18f0873d | 2689 | m_lattice[index].open = false; |
4898e958 JH |
2690 | if (!m_lattice[index].do_dataflow) |
2691 | m_lattice[index].known = true; | |
18f0873d JH |
2692 | } |
2693 | ||
2694 | /* Propagate info from SRC to DEST. If DEREF it true, assume that SRC | |
2695 | is dereferenced. */ | |
2696 | ||
2697 | void | |
2698 | modref_eaf_analysis::merge_with_ssa_name (tree dest, tree src, bool deref) | |
2699 | { | |
2700 | int index = SSA_NAME_VERSION (dest); | |
2701 | int src_index = SSA_NAME_VERSION (src); | |
2702 | ||
4898e958 JH |
2703 | /* Merging lattice with itself is a no-op. */ |
2704 | if (!deref && src == dest) | |
2705 | return; | |
2706 | ||
18f0873d JH |
2707 | m_depth++; |
2708 | analyze_ssa_name (src); | |
2709 | m_depth--; | |
2710 | if (deref) | |
2711 | m_lattice[index].merge_deref (m_lattice[src_index], false); | |
2712 | else | |
2713 | m_lattice[index].merge (m_lattice[src_index]); | |
4898e958 JH |
2714 | |
2715 | /* If we failed to produce final solution add an edge to the dataflow | |
2716 | graph. */ | |
2717 | if (!m_lattice[src_index].known) | |
2718 | { | |
2719 | modref_lattice::propagate_edge e = {index, deref}; | |
2720 | ||
2721 | if (!m_lattice[src_index].propagate_to.length ()) | |
2722 | m_names_to_propagate.safe_push (src_index); | |
2723 | m_lattice[src_index].propagate_to.safe_push (e); | |
2724 | m_lattice[src_index].changed = true; | |
2725 | m_lattice[src_index].do_dataflow = true; | |
2726 | if (dump_file) | |
2727 | fprintf (dump_file, | |
2728 | "%*sWill propgate from ssa_name %i to %i%s\n", | |
2729 | m_depth * 4 + 4, | |
2730 | "", src_index, index, deref ? " (deref)" : ""); | |
2731 | } | |
2732 | } | |
2733 | ||
2734 | /* In the case we deferred some SSA names, reprocess them. In the case some | |
2735 | dataflow edges were introduced, do the actual iterative dataflow. */ | |
2736 | ||
2737 | void | |
2738 | modref_eaf_analysis::propagate () | |
2739 | { | |
2740 | int iterations = 0; | |
2741 | size_t i; | |
2742 | int index; | |
2743 | bool changed = true; | |
2744 | ||
2745 | while (m_deferred_names.length ()) | |
2746 | { | |
2747 | tree name = m_deferred_names.pop (); | |
4898e958 JH |
2748 | if (dump_file) |
2749 | fprintf (dump_file, "Analyzing deferred SSA name\n"); | |
8d1e342b | 2750 | analyze_ssa_name (name, true); |
4898e958 JH |
2751 | } |
2752 | ||
2753 | if (!m_names_to_propagate.length ()) | |
2754 | return; | |
2755 | if (dump_file) | |
2756 | fprintf (dump_file, "Propagating EAF flags\n"); | |
2757 | ||
2758 | /* Compute reverse postorder. */ | |
2759 | auto_vec <int> rpo; | |
2760 | struct stack_entry | |
2761 | { | |
2762 | int name; | |
2763 | unsigned pos; | |
2764 | }; | |
2765 | auto_vec <struct stack_entry> stack; | |
2766 | int pos = m_names_to_propagate.length () - 1; | |
2767 | ||
2768 | rpo.safe_grow (m_names_to_propagate.length (), true); | |
2769 | stack.reserve_exact (m_names_to_propagate.length ()); | |
2770 | ||
02c80893 | 2771 | /* We reuse known flag for RPO DFS walk bookkeeping. */ |
4898e958 JH |
2772 | if (flag_checking) |
2773 | FOR_EACH_VEC_ELT (m_names_to_propagate, i, index) | |
2774 | gcc_assert (!m_lattice[index].known && m_lattice[index].changed); | |
2775 | ||
2776 | FOR_EACH_VEC_ELT (m_names_to_propagate, i, index) | |
2777 | { | |
2778 | if (!m_lattice[index].known) | |
2779 | { | |
2780 | stack_entry e = {index, 0}; | |
2781 | ||
2782 | stack.quick_push (e); | |
2783 | m_lattice[index].known = true; | |
2784 | } | |
2785 | while (stack.length ()) | |
2786 | { | |
2787 | bool found = false; | |
2788 | int index1 = stack.last ().name; | |
2789 | ||
2790 | while (stack.last ().pos < m_lattice[index1].propagate_to.length ()) | |
2791 | { | |
2792 | int index2 = m_lattice[index1] | |
2793 | .propagate_to[stack.last ().pos].ssa_name; | |
2794 | ||
2795 | stack.last ().pos++; | |
2796 | if (!m_lattice[index2].known | |
2797 | && m_lattice[index2].propagate_to.length ()) | |
2798 | { | |
2799 | stack_entry e = {index2, 0}; | |
2800 | ||
2801 | stack.quick_push (e); | |
2802 | m_lattice[index2].known = true; | |
2803 | found = true; | |
2804 | break; | |
2805 | } | |
2806 | } | |
2807 | if (!found | |
2808 | && stack.last ().pos == m_lattice[index1].propagate_to.length ()) | |
2809 | { | |
2810 | rpo[pos--] = index1; | |
2811 | stack.pop (); | |
2812 | } | |
2813 | } | |
2814 | } | |
2815 | ||
02c80893 | 2816 | /* Perform iterative dataflow. */ |
4898e958 JH |
2817 | while (changed) |
2818 | { | |
2819 | changed = false; | |
2820 | iterations++; | |
2821 | if (dump_file) | |
2822 | fprintf (dump_file, " iteration %i\n", iterations); | |
2823 | FOR_EACH_VEC_ELT (rpo, i, index) | |
2824 | { | |
2825 | if (m_lattice[index].changed) | |
2826 | { | |
2827 | size_t j; | |
2828 | ||
2829 | m_lattice[index].changed = false; | |
2830 | if (dump_file) | |
2831 | fprintf (dump_file, " Visiting ssa name %i\n", index); | |
2832 | for (j = 0; j < m_lattice[index].propagate_to.length (); j++) | |
2833 | { | |
2834 | bool ch; | |
2835 | int target = m_lattice[index].propagate_to[j].ssa_name; | |
2836 | bool deref = m_lattice[index].propagate_to[j].deref; | |
2837 | ||
2838 | if (dump_file) | |
2839 | fprintf (dump_file, " Propagating flags of ssa name" | |
2840 | " %i to %i%s\n", | |
2841 | index, target, deref ? " (deref)" : ""); | |
2842 | m_lattice[target].known = true; | |
2843 | if (!m_lattice[index].propagate_to[j].deref) | |
2844 | ch = m_lattice[target].merge (m_lattice[index]); | |
2845 | else | |
2846 | ch = m_lattice[target].merge_deref (m_lattice[index], | |
2847 | false); | |
2848 | if (!ch) | |
2849 | continue; | |
2850 | if (dump_file) | |
2851 | { | |
2852 | fprintf (dump_file, " New lattice: "); | |
2853 | m_lattice[target].dump (dump_file); | |
2854 | } | |
d70ef656 | 2855 | changed = true; |
4898e958 JH |
2856 | m_lattice[target].changed = true; |
2857 | } | |
2858 | } | |
2859 | } | |
2860 | } | |
2861 | if (dump_file) | |
2862 | fprintf (dump_file, "EAF flags propagated in %i iterations\n", iterations); | |
520d5ad3 JH |
2863 | } |
2864 | ||
b8ef019a JH |
2865 | /* Record escape points of PARM_INDEX according to LATTICE. */ |
2866 | ||
18f0873d JH |
2867 | void |
2868 | modref_eaf_analysis::record_escape_points (tree name, int parm_index, int flags) | |
b8ef019a | 2869 | { |
18f0873d JH |
2870 | modref_lattice &lattice = m_lattice[SSA_NAME_VERSION (name)]; |
2871 | ||
b8ef019a JH |
2872 | if (lattice.escape_points.length ()) |
2873 | { | |
2874 | escape_point *ep; | |
2875 | unsigned int ip; | |
2876 | cgraph_node *node = cgraph_node::get (current_function_decl); | |
2877 | ||
18f0873d | 2878 | gcc_assert (m_ipa); |
b8ef019a JH |
2879 | FOR_EACH_VEC_ELT (lattice.escape_points, ip, ep) |
2880 | if ((ep->min_flags & flags) != flags) | |
2881 | { | |
2882 | cgraph_edge *e = node->get_edge (ep->call); | |
2883 | struct escape_entry ee = {parm_index, ep->arg, | |
2884 | ep->min_flags, ep->direct}; | |
2885 | ||
2886 | escape_summaries->get_create (e)->esc.safe_push (ee); | |
2887 | } | |
2888 | } | |
2889 | } | |
2890 | ||
7798ae1a JH |
2891 | /* Determine EAF flags for function parameters |
2892 | and fill in SUMMARY/SUMMARY_LTO. If IPA is true work in IPA mode | |
02c80893 | 2893 | where we also collect escape points. |
7798ae1a | 2894 | PAST_FLAGS, PAST_RETSLOT_FLAGS, PAST_STATIC_CHAIN_FLAGS can be |
02c80893 | 2895 | used to preserve flags from previous (IPA) run for cases where |
7798ae1a JH |
2896 | late optimizations changed code in a way we can no longer analyze |
2897 | it easily. */ | |
520d5ad3 JH |
2898 | |
2899 | static void | |
85ebbabd | 2900 | analyze_parms (modref_summary *summary, modref_summary_lto *summary_lto, |
7798ae1a JH |
2901 | bool ipa, vec<eaf_flags_t> &past_flags, |
2902 | int past_retslot_flags, int past_static_chain_flags) | |
520d5ad3 JH |
2903 | { |
2904 | unsigned int parm_index = 0; | |
2905 | unsigned int count = 0; | |
85ebbabd | 2906 | int ecf_flags = flags_from_decl_or_type (current_function_decl); |
b8ef019a | 2907 | tree retslot = NULL; |
a70c0512 | 2908 | tree static_chain = NULL; |
85ebbabd | 2909 | |
b8ef019a JH |
2910 | /* If there is return slot, look up its SSA name. */ |
2911 | if (DECL_RESULT (current_function_decl) | |
2912 | && DECL_BY_REFERENCE (DECL_RESULT (current_function_decl))) | |
2913 | retslot = ssa_default_def (cfun, DECL_RESULT (current_function_decl)); | |
a70c0512 JH |
2914 | if (cfun->static_chain_decl) |
2915 | static_chain = ssa_default_def (cfun, cfun->static_chain_decl); | |
b8ef019a | 2916 | |
520d5ad3 JH |
2917 | for (tree parm = DECL_ARGUMENTS (current_function_decl); parm; |
2918 | parm = TREE_CHAIN (parm)) | |
2919 | count++; | |
2920 | ||
a70c0512 | 2921 | if (!count && !retslot && !static_chain) |
520d5ad3 JH |
2922 | return; |
2923 | ||
18f0873d | 2924 | modref_eaf_analysis eaf_analysis (ipa); |
520d5ad3 | 2925 | |
4898e958 JH |
2926 | /* Determine all SSA names we need to know flags for. */ |
2927 | for (tree parm = DECL_ARGUMENTS (current_function_decl); parm; | |
2928 | parm = TREE_CHAIN (parm)) | |
2929 | { | |
2930 | tree name = ssa_default_def (cfun, parm); | |
2931 | if (name) | |
2932 | eaf_analysis.analyze_ssa_name (name); | |
2933 | } | |
2934 | if (retslot) | |
2935 | eaf_analysis.analyze_ssa_name (retslot); | |
2936 | if (static_chain) | |
2937 | eaf_analysis.analyze_ssa_name (static_chain); | |
2938 | ||
2939 | /* Do the dataflow. */ | |
2940 | eaf_analysis.propagate (); | |
2941 | ||
e2dd12ab JH |
2942 | tree attr = lookup_attribute ("fn spec", |
2943 | TYPE_ATTRIBUTES | |
2944 | (TREE_TYPE (current_function_decl))); | |
2945 | attr_fnspec fnspec (attr | |
2946 | ? TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr))) | |
2947 | : ""); | |
2948 | ||
2949 | ||
4898e958 | 2950 | /* Store results to summaries. */ |
520d5ad3 JH |
2951 | for (tree parm = DECL_ARGUMENTS (current_function_decl); parm; parm_index++, |
2952 | parm = TREE_CHAIN (parm)) | |
2953 | { | |
2954 | tree name = ssa_default_def (cfun, parm); | |
3350e59f JH |
2955 | if (!name || has_zero_uses (name)) |
2956 | { | |
2957 | /* We do not track non-SSA parameters, | |
2958 | but we want to track unused gimple_regs. */ | |
2959 | if (!is_gimple_reg (parm)) | |
2960 | continue; | |
2961 | if (summary) | |
2962 | { | |
2963 | if (parm_index >= summary->arg_flags.length ()) | |
2964 | summary->arg_flags.safe_grow_cleared (count, true); | |
2965 | summary->arg_flags[parm_index] = EAF_UNUSED; | |
2966 | } | |
2967 | else if (summary_lto) | |
2968 | { | |
2969 | if (parm_index >= summary_lto->arg_flags.length ()) | |
2970 | summary_lto->arg_flags.safe_grow_cleared (count, true); | |
2971 | summary_lto->arg_flags[parm_index] = EAF_UNUSED; | |
2972 | } | |
2973 | continue; | |
2974 | } | |
18f0873d | 2975 | int flags = eaf_analysis.get_ssa_name_flags (name); |
e2dd12ab JH |
2976 | int attr_flags = fnspec.arg_eaf_flags (parm_index); |
2977 | ||
2978 | if (dump_file && (flags | attr_flags) != flags && !(flags & EAF_UNUSED)) | |
2979 | { | |
2980 | fprintf (dump_file, | |
2981 | " Flags for param %i combined with fnspec flags:", | |
2982 | (int)parm_index); | |
2983 | dump_eaf_flags (dump_file, attr_flags, false); | |
2984 | fprintf (dump_file, " determined: "); | |
2985 | dump_eaf_flags (dump_file, flags, true); | |
2986 | } | |
2987 | flags |= attr_flags; | |
85ebbabd | 2988 | |
4341b1b1 JH |
2989 | /* Eliminate useless flags so we do not end up storing unnecessary |
2990 | summaries. */ | |
2991 | ||
2992 | flags = remove_useless_eaf_flags | |
2993 | (flags, ecf_flags, | |
2994 | VOID_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl)))); | |
7798ae1a JH |
2995 | if (past_flags.length () > parm_index) |
2996 | { | |
2997 | int past = past_flags[parm_index]; | |
2998 | past = remove_useless_eaf_flags | |
2999 | (past, ecf_flags, | |
3000 | VOID_TYPE_P (TREE_TYPE | |
3001 | (TREE_TYPE (current_function_decl)))); | |
3002 | if (dump_file && (flags | past) != flags && !(flags & EAF_UNUSED)) | |
3003 | { | |
3004 | fprintf (dump_file, | |
3005 | " Flags for param %i combined with IPA pass:", | |
3006 | (int)parm_index); | |
3007 | dump_eaf_flags (dump_file, past, false); | |
e2dd12ab JH |
3008 | fprintf (dump_file, " determined: "); |
3009 | dump_eaf_flags (dump_file, flags, true); | |
7798ae1a JH |
3010 | } |
3011 | if (!(flags & EAF_UNUSED)) | |
3012 | flags |= past; | |
3013 | } | |
520d5ad3 JH |
3014 | |
3015 | if (flags) | |
3016 | { | |
85ebbabd JH |
3017 | if (summary) |
3018 | { | |
3019 | if (parm_index >= summary->arg_flags.length ()) | |
3020 | summary->arg_flags.safe_grow_cleared (count, true); | |
3021 | summary->arg_flags[parm_index] = flags; | |
3022 | } | |
3023 | else if (summary_lto) | |
3024 | { | |
3025 | if (parm_index >= summary_lto->arg_flags.length ()) | |
3026 | summary_lto->arg_flags.safe_grow_cleared (count, true); | |
3027 | summary_lto->arg_flags[parm_index] = flags; | |
3028 | } | |
18f0873d | 3029 | eaf_analysis.record_escape_points (name, parm_index, flags); |
b8ef019a JH |
3030 | } |
3031 | } | |
3032 | if (retslot) | |
3033 | { | |
18f0873d | 3034 | int flags = eaf_analysis.get_ssa_name_flags (retslot); |
7798ae1a | 3035 | int past = past_retslot_flags; |
85ebbabd | 3036 | |
b8ef019a | 3037 | flags = remove_useless_eaf_flags (flags, ecf_flags, false); |
7798ae1a JH |
3038 | past = remove_useless_eaf_flags |
3039 | (past, ecf_flags, | |
3040 | VOID_TYPE_P (TREE_TYPE | |
3041 | (TREE_TYPE (current_function_decl)))); | |
3042 | if (dump_file && (flags | past) != flags && !(flags & EAF_UNUSED)) | |
3043 | { | |
3044 | fprintf (dump_file, | |
3045 | " Retslot flags combined with IPA pass:"); | |
3046 | dump_eaf_flags (dump_file, past, false); | |
e2dd12ab | 3047 | fprintf (dump_file, " determined: "); |
7798ae1a JH |
3048 | dump_eaf_flags (dump_file, flags, true); |
3049 | } | |
3050 | if (!(flags & EAF_UNUSED)) | |
3051 | flags |= past; | |
b8ef019a JH |
3052 | if (flags) |
3053 | { | |
3054 | if (summary) | |
3055 | summary->retslot_flags = flags; | |
3056 | if (summary_lto) | |
3057 | summary_lto->retslot_flags = flags; | |
18f0873d | 3058 | eaf_analysis.record_escape_points (retslot, |
1f3a3363 | 3059 | MODREF_RETSLOT_PARM, flags); |
520d5ad3 JH |
3060 | } |
3061 | } | |
a70c0512 JH |
3062 | if (static_chain) |
3063 | { | |
18f0873d | 3064 | int flags = eaf_analysis.get_ssa_name_flags (static_chain); |
7798ae1a | 3065 | int past = past_static_chain_flags; |
a70c0512 JH |
3066 | |
3067 | flags = remove_useless_eaf_flags (flags, ecf_flags, false); | |
7798ae1a JH |
3068 | past = remove_useless_eaf_flags |
3069 | (past, ecf_flags, | |
3070 | VOID_TYPE_P (TREE_TYPE | |
3071 | (TREE_TYPE (current_function_decl)))); | |
3072 | if (dump_file && (flags | past) != flags && !(flags & EAF_UNUSED)) | |
3073 | { | |
3074 | fprintf (dump_file, | |
3075 | " Static chain flags combined with IPA pass:"); | |
3076 | dump_eaf_flags (dump_file, past, false); | |
e2dd12ab | 3077 | fprintf (dump_file, " determined: "); |
7798ae1a JH |
3078 | dump_eaf_flags (dump_file, flags, true); |
3079 | } | |
3080 | if (!(flags & EAF_UNUSED)) | |
78dd0de9 | 3081 | flags |= past; |
a70c0512 JH |
3082 | if (flags) |
3083 | { | |
3084 | if (summary) | |
3085 | summary->static_chain_flags = flags; | |
3086 | if (summary_lto) | |
3087 | summary_lto->static_chain_flags = flags; | |
18f0873d | 3088 | eaf_analysis.record_escape_points (static_chain, |
1f3a3363 | 3089 | MODREF_STATIC_CHAIN_PARM, |
18f0873d | 3090 | flags); |
a70c0512 JH |
3091 | } |
3092 | } | |
520d5ad3 JH |
3093 | } |
3094 | ||
2cadaa1f | 3095 | /* Analyze function. IPA indicates whether we're running in local mode |
494bdadf JH |
3096 | (false) or the IPA mode (true). |
3097 | Return true if fixup cfg is needed after the pass. */ | |
d119f34c | 3098 | |
494bdadf | 3099 | static bool |
2cadaa1f | 3100 | analyze_function (bool ipa) |
d119f34c | 3101 | { |
494bdadf | 3102 | bool fixup_cfg = false; |
d119f34c | 3103 | if (dump_file) |
2cadaa1f JH |
3104 | fprintf (dump_file, "\n\nmodref analyzing '%s' (ipa=%i)%s%s\n", |
3105 | cgraph_node::get (current_function_decl)->dump_name (), ipa, | |
67c935c8 JH |
3106 | TREE_READONLY (current_function_decl) ? " (const)" : "", |
3107 | DECL_PURE_P (current_function_decl) ? " (pure)" : ""); | |
d119f34c JH |
3108 | |
3109 | /* Don't analyze this function if it's compiled with -fno-strict-aliasing. */ | |
008e7397 JH |
3110 | if (!flag_ipa_modref |
3111 | || lookup_attribute ("noipa", DECL_ATTRIBUTES (current_function_decl))) | |
494bdadf | 3112 | return false; |
d119f34c | 3113 | |
d119f34c JH |
3114 | /* Compute no-LTO summaries when local optimization is going to happen. */ |
3115 | bool nolto = (!ipa || ((!flag_lto || flag_fat_lto_objects) && !in_lto_p) | |
3116 | || (in_lto_p && !flag_wpa | |
3117 | && flag_incremental_link != INCREMENTAL_LINK_LTO)); | |
d119f34c JH |
3118 | /* Compute LTO when LTO streaming is going to happen. */ |
3119 | bool lto = ipa && ((flag_lto && !in_lto_p) | |
3120 | || flag_wpa | |
3121 | || flag_incremental_link == INCREMENTAL_LINK_LTO); | |
71dbabcc JH |
3122 | cgraph_node *fnode = cgraph_node::get (current_function_decl); |
3123 | ||
3124 | modref_summary *summary = NULL; | |
3125 | modref_summary_lto *summary_lto = NULL; | |
3126 | ||
f6f704fd JH |
3127 | bool past_flags_known = false; |
3128 | auto_vec <eaf_flags_t> past_flags; | |
3129 | int past_retslot_flags = 0; | |
3130 | int past_static_chain_flags = 0; | |
3131 | ||
71dbabcc JH |
3132 | /* Initialize the summary. |
3133 | If we run in local mode there is possibly pre-existing summary from | |
3134 | IPA pass. Dump it so it is easy to compare if mod-ref info has | |
3135 | improved. */ | |
3136 | if (!ipa) | |
3137 | { | |
3138 | if (!optimization_summaries) | |
3139 | optimization_summaries = modref_summaries::create_ggc (symtab); | |
3140 | else /* Remove existing summary if we are re-running the pass. */ | |
3141 | { | |
22c24234 ML |
3142 | summary = optimization_summaries->get (fnode); |
3143 | if (summary != NULL | |
56cb815b | 3144 | && summary->loads) |
71dbabcc | 3145 | { |
22c24234 ML |
3146 | if (dump_file) |
3147 | { | |
3148 | fprintf (dump_file, "Past summary:\n"); | |
3149 | optimization_summaries->get (fnode)->dump (dump_file); | |
3150 | } | |
f6f704fd JH |
3151 | past_flags.reserve_exact (summary->arg_flags.length ()); |
3152 | past_flags.splice (summary->arg_flags); | |
3153 | past_retslot_flags = summary->retslot_flags; | |
3154 | past_static_chain_flags = summary->static_chain_flags; | |
3155 | past_flags_known = true; | |
71dbabcc | 3156 | } |
616ca102 | 3157 | optimization_summaries->remove (fnode); |
71dbabcc | 3158 | } |
616ca102 | 3159 | summary = optimization_summaries->get_create (fnode); |
71dbabcc JH |
3160 | gcc_checking_assert (nolto && !lto); |
3161 | } | |
8a2fd716 | 3162 | /* In IPA mode we analyze every function precisely once. Assert that. */ |
71dbabcc JH |
3163 | else |
3164 | { | |
3165 | if (nolto) | |
3166 | { | |
3167 | if (!summaries) | |
3168 | summaries = modref_summaries::create_ggc (symtab); | |
3169 | else | |
616ca102 ML |
3170 | summaries->remove (fnode); |
3171 | summary = summaries->get_create (fnode); | |
71dbabcc JH |
3172 | } |
3173 | if (lto) | |
3174 | { | |
3175 | if (!summaries_lto) | |
3176 | summaries_lto = modref_summaries_lto::create_ggc (symtab); | |
3177 | else | |
616ca102 ML |
3178 | summaries_lto->remove (fnode); |
3179 | summary_lto = summaries_lto->get_create (fnode); | |
71dbabcc | 3180 | } |
6cef01c3 JH |
3181 | if (!fnspec_summaries) |
3182 | fnspec_summaries = new fnspec_summaries_t (symtab); | |
85ebbabd JH |
3183 | if (!escape_summaries) |
3184 | escape_summaries = new escape_summaries_t (symtab); | |
71dbabcc JH |
3185 | } |
3186 | ||
d119f34c JH |
3187 | |
3188 | /* Create and initialize summary for F. | |
3189 | Note that summaries may be already allocated from previous | |
3190 | run of the pass. */ | |
3191 | if (nolto) | |
3192 | { | |
3193 | gcc_assert (!summary->loads); | |
8632f8c6 | 3194 | summary->loads = modref_records::create_ggc (); |
d119f34c | 3195 | gcc_assert (!summary->stores); |
8632f8c6 | 3196 | summary->stores = modref_records::create_ggc (); |
617695cd | 3197 | summary->writes_errno = false; |
992644c3 | 3198 | summary->side_effects = false; |
a34edf9a JH |
3199 | summary->nondeterministic = false; |
3200 | summary->calls_interposable = false; | |
d119f34c JH |
3201 | } |
3202 | if (lto) | |
3203 | { | |
71dbabcc | 3204 | gcc_assert (!summary_lto->loads); |
8632f8c6 | 3205 | summary_lto->loads = modref_records_lto::create_ggc (); |
71dbabcc | 3206 | gcc_assert (!summary_lto->stores); |
8632f8c6 | 3207 | summary_lto->stores = modref_records_lto::create_ggc (); |
6cef01c3 | 3208 | summary_lto->writes_errno = false; |
992644c3 | 3209 | summary_lto->side_effects = false; |
a34edf9a JH |
3210 | summary_lto->nondeterministic = false; |
3211 | summary_lto->calls_interposable = false; | |
d119f34c | 3212 | } |
520d5ad3 | 3213 | |
7798ae1a JH |
3214 | analyze_parms (summary, summary_lto, ipa, |
3215 | past_flags, past_retslot_flags, past_static_chain_flags); | |
520d5ad3 | 3216 | |
09a4ffb7 JH |
3217 | { |
3218 | modref_access_analysis analyzer (ipa, summary, summary_lto); | |
3219 | analyzer.analyze (); | |
3220 | } | |
494bdadf JH |
3221 | |
3222 | if (!ipa && flag_ipa_pure_const) | |
3223 | { | |
1b62cddc | 3224 | if (!summary->stores->every_base && !summary->stores->bases |
a34edf9a | 3225 | && !summary->nondeterministic) |
494bdadf | 3226 | { |
a34edf9a JH |
3227 | if (!summary->loads->every_base && !summary->loads->bases |
3228 | && !summary->calls_interposable) | |
616ca102 ML |
3229 | fixup_cfg = ipa_make_function_const (fnode, |
3230 | summary->side_effects, true); | |
494bdadf | 3231 | else |
616ca102 ML |
3232 | fixup_cfg = ipa_make_function_pure (fnode, |
3233 | summary->side_effects, true); | |
494bdadf JH |
3234 | } |
3235 | } | |
09a4ffb7 | 3236 | int ecf_flags = flags_from_decl_or_type (current_function_decl); |
71dbabcc JH |
3237 | if (summary && !summary->useful_p (ecf_flags)) |
3238 | { | |
3239 | if (!ipa) | |
3240 | optimization_summaries->remove (fnode); | |
3241 | else | |
3242 | summaries->remove (fnode); | |
3243 | summary = NULL; | |
3244 | } | |
e0040bc3 | 3245 | if (summary) |
5aa91072 | 3246 | summary->finalize (current_function_decl); |
71dbabcc JH |
3247 | if (summary_lto && !summary_lto->useful_p (ecf_flags)) |
3248 | { | |
3249 | summaries_lto->remove (fnode); | |
3250 | summary_lto = NULL; | |
3251 | } | |
992644c3 | 3252 | |
85ebbabd JH |
3253 | if (ipa && !summary && !summary_lto) |
3254 | remove_modref_edge_summaries (fnode); | |
d119f34c JH |
3255 | |
3256 | if (dump_file) | |
3257 | { | |
3258 | fprintf (dump_file, " - modref done with result: tracked.\n"); | |
71dbabcc JH |
3259 | if (summary) |
3260 | summary->dump (dump_file); | |
3261 | if (summary_lto) | |
3262 | summary_lto->dump (dump_file); | |
85ebbabd | 3263 | dump_modref_edge_summaries (dump_file, fnode, 2); |
f6f704fd JH |
3264 | /* To simplify debugging, compare IPA and local solutions. */ |
3265 | if (past_flags_known && summary) | |
3266 | { | |
3267 | size_t len = summary->arg_flags.length (); | |
3268 | ||
3269 | if (past_flags.length () > len) | |
3270 | len = past_flags.length (); | |
3271 | for (size_t i = 0; i < len; i++) | |
3272 | { | |
3273 | int old_flags = i < past_flags.length () ? past_flags[i] : 0; | |
3274 | int new_flags = i < summary->arg_flags.length () | |
3275 | ? summary->arg_flags[i] : 0; | |
3276 | old_flags = remove_useless_eaf_flags | |
3277 | (old_flags, flags_from_decl_or_type (current_function_decl), | |
3278 | VOID_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl)))); | |
3279 | if (old_flags != new_flags) | |
3280 | { | |
7798ae1a JH |
3281 | if ((old_flags & ~new_flags) == 0 |
3282 | || (new_flags & EAF_UNUSED)) | |
f6f704fd JH |
3283 | fprintf (dump_file, " Flags for param %i improved:", |
3284 | (int)i); | |
f6f704fd | 3285 | else |
7798ae1a | 3286 | gcc_unreachable (); |
f6f704fd JH |
3287 | dump_eaf_flags (dump_file, old_flags, false); |
3288 | fprintf (dump_file, " -> "); | |
3289 | dump_eaf_flags (dump_file, new_flags, true); | |
3290 | } | |
3291 | } | |
3292 | past_retslot_flags = remove_useless_eaf_flags | |
3293 | (past_retslot_flags, | |
3294 | flags_from_decl_or_type (current_function_decl), | |
3295 | VOID_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl)))); | |
3296 | if (past_retslot_flags != summary->retslot_flags) | |
3297 | { | |
7798ae1a JH |
3298 | if ((past_retslot_flags & ~summary->retslot_flags) == 0 |
3299 | || (summary->retslot_flags & EAF_UNUSED)) | |
f6f704fd | 3300 | fprintf (dump_file, " Flags for retslot improved:"); |
f6f704fd | 3301 | else |
7798ae1a | 3302 | gcc_unreachable (); |
f6f704fd JH |
3303 | dump_eaf_flags (dump_file, past_retslot_flags, false); |
3304 | fprintf (dump_file, " -> "); | |
3305 | dump_eaf_flags (dump_file, summary->retslot_flags, true); | |
3306 | } | |
3307 | past_static_chain_flags = remove_useless_eaf_flags | |
3308 | (past_static_chain_flags, | |
3309 | flags_from_decl_or_type (current_function_decl), | |
3310 | VOID_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl)))); | |
3311 | if (past_static_chain_flags != summary->static_chain_flags) | |
3312 | { | |
7798ae1a JH |
3313 | if ((past_static_chain_flags & ~summary->static_chain_flags) == 0 |
3314 | || (summary->static_chain_flags & EAF_UNUSED)) | |
f6f704fd | 3315 | fprintf (dump_file, " Flags for static chain improved:"); |
f6f704fd | 3316 | else |
7798ae1a | 3317 | gcc_unreachable (); |
f6f704fd JH |
3318 | dump_eaf_flags (dump_file, past_static_chain_flags, false); |
3319 | fprintf (dump_file, " -> "); | |
3320 | dump_eaf_flags (dump_file, summary->static_chain_flags, true); | |
3321 | } | |
3322 | } | |
3323 | else if (past_flags_known && !summary) | |
3324 | { | |
3325 | for (size_t i = 0; i < past_flags.length (); i++) | |
3326 | { | |
3327 | int old_flags = past_flags[i]; | |
3328 | old_flags = remove_useless_eaf_flags | |
3329 | (old_flags, flags_from_decl_or_type (current_function_decl), | |
3330 | VOID_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl)))); | |
3331 | if (old_flags) | |
3332 | { | |
3333 | fprintf (dump_file, " Flags for param %i worsened:", | |
3334 | (int)i); | |
3335 | dump_eaf_flags (dump_file, old_flags, false); | |
3336 | fprintf (dump_file, " -> \n"); | |
3337 | } | |
3338 | } | |
3339 | past_retslot_flags = remove_useless_eaf_flags | |
3340 | (past_retslot_flags, | |
3341 | flags_from_decl_or_type (current_function_decl), | |
3342 | VOID_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl)))); | |
3343 | if (past_retslot_flags) | |
3344 | { | |
3345 | fprintf (dump_file, " Flags for retslot worsened:"); | |
3346 | dump_eaf_flags (dump_file, past_retslot_flags, false); | |
3347 | fprintf (dump_file, " ->\n"); | |
3348 | } | |
3349 | past_static_chain_flags = remove_useless_eaf_flags | |
3350 | (past_static_chain_flags, | |
3351 | flags_from_decl_or_type (current_function_decl), | |
3352 | VOID_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl)))); | |
3353 | if (past_static_chain_flags) | |
3354 | { | |
3355 | fprintf (dump_file, " Flags for static chain worsened:"); | |
3356 | dump_eaf_flags (dump_file, past_static_chain_flags, false); | |
3357 | fprintf (dump_file, " ->\n"); | |
3358 | } | |
3359 | } | |
d119f34c | 3360 | } |
494bdadf | 3361 | return fixup_cfg; |
d119f34c JH |
3362 | } |
3363 | ||
3364 | /* Callback for generate_summary. */ | |
3365 | ||
3366 | static void | |
3367 | modref_generate (void) | |
3368 | { | |
3369 | struct cgraph_node *node; | |
3370 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) | |
3371 | { | |
3372 | function *f = DECL_STRUCT_FUNCTION (node->decl); | |
3373 | if (!f) | |
3374 | continue; | |
3375 | push_cfun (f); | |
2cadaa1f | 3376 | analyze_function (true); |
d119f34c JH |
3377 | pop_cfun (); |
3378 | } | |
3379 | } | |
3380 | ||
18f0873d JH |
3381 | } /* ANON namespace. */ |
3382 | ||
d70ef656 JH |
3383 | /* Debugging helper. */ |
3384 | ||
3385 | void | |
3386 | debug_eaf_flags (int flags) | |
3387 | { | |
3388 | dump_eaf_flags (stderr, flags, true); | |
3389 | } | |
3390 | ||
d119f34c JH |
3391 | /* Called when a new function is inserted to callgraph late. */ |
3392 | ||
3393 | void | |
3394 | modref_summaries::insert (struct cgraph_node *node, modref_summary *) | |
3395 | { | |
56cb815b JH |
3396 | /* Local passes ought to be executed by the pass manager. */ |
3397 | if (this == optimization_summaries) | |
71dbabcc JH |
3398 | { |
3399 | optimization_summaries->remove (node); | |
56cb815b JH |
3400 | return; |
3401 | } | |
1a90e99f JH |
3402 | if (!DECL_STRUCT_FUNCTION (node->decl) |
3403 | || !opt_for_fn (node->decl, flag_ipa_modref)) | |
56cb815b | 3404 | { |
71dbabcc | 3405 | summaries->remove (node); |
56cb815b | 3406 | return; |
71dbabcc JH |
3407 | } |
3408 | push_cfun (DECL_STRUCT_FUNCTION (node->decl)); | |
2cadaa1f | 3409 | analyze_function (true); |
71dbabcc JH |
3410 | pop_cfun (); |
3411 | } | |
3412 | ||
3413 | /* Called when a new function is inserted to callgraph late. */ | |
3414 | ||
3415 | void | |
3416 | modref_summaries_lto::insert (struct cgraph_node *node, modref_summary_lto *) | |
3417 | { | |
3418 | /* We do not support adding new function when IPA information is already | |
3419 | propagated. This is done only by SIMD cloning that is not very | |
3420 | critical. */ | |
3421 | if (!DECL_STRUCT_FUNCTION (node->decl) | |
1a90e99f | 3422 | || !opt_for_fn (node->decl, flag_ipa_modref) |
71dbabcc JH |
3423 | || propagated) |
3424 | { | |
3425 | summaries_lto->remove (node); | |
3426 | return; | |
3427 | } | |
d119f34c | 3428 | push_cfun (DECL_STRUCT_FUNCTION (node->decl)); |
2cadaa1f | 3429 | analyze_function (true); |
d119f34c JH |
3430 | pop_cfun (); |
3431 | } | |
3432 | ||
3433 | /* Called when new clone is inserted to callgraph late. */ | |
3434 | ||
3435 | void | |
56cb815b | 3436 | modref_summaries::duplicate (cgraph_node *, cgraph_node *dst, |
d119f34c JH |
3437 | modref_summary *src_data, |
3438 | modref_summary *dst_data) | |
3439 | { | |
8a2fd716 | 3440 | /* Do not duplicate optimization summaries; we do not handle parameter |
56cb815b JH |
3441 | transforms on them. */ |
3442 | if (this == optimization_summaries) | |
d119f34c | 3443 | { |
56cb815b JH |
3444 | optimization_summaries->remove (dst); |
3445 | return; | |
d119f34c | 3446 | } |
8632f8c6 | 3447 | dst_data->stores = modref_records::create_ggc (); |
56cb815b | 3448 | dst_data->stores->copy_from (src_data->stores); |
8632f8c6 | 3449 | dst_data->loads = modref_records::create_ggc (); |
56cb815b | 3450 | dst_data->loads->copy_from (src_data->loads); |
64f3e71c JH |
3451 | dst_data->kills.reserve_exact (src_data->kills.length ()); |
3452 | dst_data->kills.splice (src_data->kills); | |
617695cd | 3453 | dst_data->writes_errno = src_data->writes_errno; |
992644c3 | 3454 | dst_data->side_effects = src_data->side_effects; |
a34edf9a JH |
3455 | dst_data->nondeterministic = src_data->nondeterministic; |
3456 | dst_data->calls_interposable = src_data->calls_interposable; | |
5962efe9 JH |
3457 | if (src_data->arg_flags.length ()) |
3458 | dst_data->arg_flags = src_data->arg_flags.copy (); | |
b8ef019a | 3459 | dst_data->retslot_flags = src_data->retslot_flags; |
a70c0512 | 3460 | dst_data->static_chain_flags = src_data->static_chain_flags; |
71dbabcc JH |
3461 | } |
3462 | ||
3463 | /* Called when new clone is inserted to callgraph late. */ | |
3464 | ||
3465 | void | |
3466 | modref_summaries_lto::duplicate (cgraph_node *, cgraph_node *, | |
3467 | modref_summary_lto *src_data, | |
3468 | modref_summary_lto *dst_data) | |
3469 | { | |
8a2fd716 | 3470 | /* Be sure that no further cloning happens after ipa-modref. If it does |
fe90c504 JH |
3471 | we will need to update signatures for possible param changes. */ |
3472 | gcc_checking_assert (!((modref_summaries_lto *)summaries_lto)->propagated); | |
8632f8c6 | 3473 | dst_data->stores = modref_records_lto::create_ggc (); |
56cb815b | 3474 | dst_data->stores->copy_from (src_data->stores); |
8632f8c6 | 3475 | dst_data->loads = modref_records_lto::create_ggc (); |
56cb815b | 3476 | dst_data->loads->copy_from (src_data->loads); |
74509b96 JH |
3477 | dst_data->kills.reserve_exact (src_data->kills.length ()); |
3478 | dst_data->kills.splice (src_data->kills); | |
6cef01c3 | 3479 | dst_data->writes_errno = src_data->writes_errno; |
992644c3 | 3480 | dst_data->side_effects = src_data->side_effects; |
a34edf9a JH |
3481 | dst_data->nondeterministic = src_data->nondeterministic; |
3482 | dst_data->calls_interposable = src_data->calls_interposable; | |
5962efe9 JH |
3483 | if (src_data->arg_flags.length ()) |
3484 | dst_data->arg_flags = src_data->arg_flags.copy (); | |
b8ef019a | 3485 | dst_data->retslot_flags = src_data->retslot_flags; |
a70c0512 | 3486 | dst_data->static_chain_flags = src_data->static_chain_flags; |
d119f34c JH |
3487 | } |
3488 | ||
3489 | namespace | |
3490 | { | |
3491 | /* Definition of the modref pass on GIMPLE. */ | |
3492 | const pass_data pass_data_modref = { | |
3493 | GIMPLE_PASS, | |
3494 | "modref", | |
3495 | OPTGROUP_IPA, | |
3496 | TV_TREE_MODREF, | |
3497 | (PROP_cfg | PROP_ssa), | |
3498 | 0, | |
3499 | 0, | |
3500 | 0, | |
3501 | 0, | |
3502 | }; | |
3503 | ||
3504 | class pass_modref : public gimple_opt_pass | |
3505 | { | |
3506 | public: | |
3507 | pass_modref (gcc::context *ctxt) | |
3508 | : gimple_opt_pass (pass_data_modref, ctxt) {} | |
3509 | ||
d119f34c | 3510 | /* opt_pass methods: */ |
725793af | 3511 | opt_pass *clone () final override |
d119f34c JH |
3512 | { |
3513 | return new pass_modref (m_ctxt); | |
3514 | } | |
725793af | 3515 | bool gate (function *) final override |
d119f34c JH |
3516 | { |
3517 | return flag_ipa_modref; | |
3518 | } | |
725793af | 3519 | unsigned int execute (function *) final override; |
d119f34c JH |
3520 | }; |
3521 | ||
3522 | /* Encode TT to the output block OB using the summary streaming API. */ | |
3523 | ||
3524 | static void | |
3525 | write_modref_records (modref_records_lto *tt, struct output_block *ob) | |
3526 | { | |
d119f34c JH |
3527 | streamer_write_uhwi (ob, tt->every_base); |
3528 | streamer_write_uhwi (ob, vec_safe_length (tt->bases)); | |
74509b96 | 3529 | for (auto base_node : tt->bases) |
d119f34c JH |
3530 | { |
3531 | stream_write_tree (ob, base_node->base, true); | |
3532 | ||
3533 | streamer_write_uhwi (ob, base_node->every_ref); | |
3534 | streamer_write_uhwi (ob, vec_safe_length (base_node->refs)); | |
c33f4742 | 3535 | |
74509b96 | 3536 | for (auto ref_node : base_node->refs) |
d119f34c JH |
3537 | { |
3538 | stream_write_tree (ob, ref_node->ref, true); | |
c33f4742 JH |
3539 | streamer_write_uhwi (ob, ref_node->every_access); |
3540 | streamer_write_uhwi (ob, vec_safe_length (ref_node->accesses)); | |
3541 | ||
74509b96 JH |
3542 | for (auto access_node : ref_node->accesses) |
3543 | access_node.stream_out (ob); | |
d119f34c JH |
3544 | } |
3545 | } | |
3546 | } | |
3547 | ||
3548 | /* Read a modref_tree from the input block IB using the data from DATA_IN. | |
3549 | This assumes that the tree was encoded using write_modref_tree. | |
3550 | Either nolto_ret or lto_ret is initialized by the tree depending whether | |
46a27415 | 3551 | LTO streaming is expected or not. */ |
d119f34c | 3552 | |
18f0873d | 3553 | static void |
8632f8c6 JH |
3554 | read_modref_records (tree decl, |
3555 | lto_input_block *ib, struct data_in *data_in, | |
d119f34c JH |
3556 | modref_records **nolto_ret, |
3557 | modref_records_lto **lto_ret) | |
3558 | { | |
8632f8c6 JH |
3559 | size_t max_bases = opt_for_fn (decl, param_modref_max_bases); |
3560 | size_t max_refs = opt_for_fn (decl, param_modref_max_refs); | |
3561 | size_t max_accesses = opt_for_fn (decl, param_modref_max_accesses); | |
d119f34c | 3562 | |
71dbabcc | 3563 | if (lto_ret) |
8632f8c6 | 3564 | *lto_ret = modref_records_lto::create_ggc (); |
71dbabcc | 3565 | if (nolto_ret) |
8632f8c6 | 3566 | *nolto_ret = modref_records::create_ggc (); |
71dbabcc | 3567 | gcc_checking_assert (lto_ret || nolto_ret); |
d119f34c JH |
3568 | |
3569 | size_t every_base = streamer_read_uhwi (ib); | |
3570 | size_t nbase = streamer_read_uhwi (ib); | |
3571 | ||
3572 | gcc_assert (!every_base || nbase == 0); | |
3573 | if (every_base) | |
3574 | { | |
71dbabcc | 3575 | if (nolto_ret) |
d119f34c | 3576 | (*nolto_ret)->collapse (); |
71dbabcc | 3577 | if (lto_ret) |
d119f34c JH |
3578 | (*lto_ret)->collapse (); |
3579 | } | |
3580 | for (size_t i = 0; i < nbase; i++) | |
3581 | { | |
3582 | tree base_tree = stream_read_tree (ib, data_in); | |
3583 | modref_base_node <alias_set_type> *nolto_base_node = NULL; | |
3584 | modref_base_node <tree> *lto_base_node = NULL; | |
3585 | ||
3586 | /* At stream in time we have LTO alias info. Check if we streamed in | |
3587 | something obviously unnecessary. Do not glob types by alias sets; | |
3588 | it is not 100% clear that ltrans types will get merged same way. | |
3589 | Types may get refined based on ODR type conflicts. */ | |
3590 | if (base_tree && !get_alias_set (base_tree)) | |
3591 | { | |
3592 | if (dump_file) | |
3593 | { | |
3594 | fprintf (dump_file, "Streamed in alias set 0 type "); | |
3595 | print_generic_expr (dump_file, base_tree); | |
3596 | fprintf (dump_file, "\n"); | |
3597 | } | |
3598 | base_tree = NULL; | |
3599 | } | |
3600 | ||
71dbabcc | 3601 | if (nolto_ret) |
d119f34c JH |
3602 | nolto_base_node = (*nolto_ret)->insert_base (base_tree |
3603 | ? get_alias_set (base_tree) | |
8632f8c6 | 3604 | : 0, 0, INT_MAX); |
71dbabcc | 3605 | if (lto_ret) |
8632f8c6 | 3606 | lto_base_node = (*lto_ret)->insert_base (base_tree, 0, max_bases); |
d119f34c JH |
3607 | size_t every_ref = streamer_read_uhwi (ib); |
3608 | size_t nref = streamer_read_uhwi (ib); | |
3609 | ||
3610 | gcc_assert (!every_ref || nref == 0); | |
3611 | if (every_ref) | |
3612 | { | |
3613 | if (nolto_base_node) | |
3614 | nolto_base_node->collapse (); | |
3615 | if (lto_base_node) | |
3616 | lto_base_node->collapse (); | |
3617 | } | |
3618 | for (size_t j = 0; j < nref; j++) | |
3619 | { | |
3620 | tree ref_tree = stream_read_tree (ib, data_in); | |
3621 | ||
3622 | if (ref_tree && !get_alias_set (ref_tree)) | |
3623 | { | |
3624 | if (dump_file) | |
3625 | { | |
3626 | fprintf (dump_file, "Streamed in alias set 0 type "); | |
3627 | print_generic_expr (dump_file, ref_tree); | |
3628 | fprintf (dump_file, "\n"); | |
3629 | } | |
c33f4742 | 3630 | ref_tree = NULL; |
d119f34c JH |
3631 | } |
3632 | ||
c33f4742 JH |
3633 | modref_ref_node <alias_set_type> *nolto_ref_node = NULL; |
3634 | modref_ref_node <tree> *lto_ref_node = NULL; | |
3635 | ||
d119f34c | 3636 | if (nolto_base_node) |
c33f4742 JH |
3637 | nolto_ref_node |
3638 | = nolto_base_node->insert_ref (ref_tree | |
3639 | ? get_alias_set (ref_tree) : 0, | |
3640 | max_refs); | |
d119f34c | 3641 | if (lto_base_node) |
c33f4742 JH |
3642 | lto_ref_node = lto_base_node->insert_ref (ref_tree, max_refs); |
3643 | ||
3644 | size_t every_access = streamer_read_uhwi (ib); | |
3645 | size_t naccesses = streamer_read_uhwi (ib); | |
3646 | ||
425369bf JH |
3647 | if (nolto_ref_node && every_access) |
3648 | nolto_ref_node->collapse (); | |
3649 | if (lto_ref_node && every_access) | |
3650 | lto_ref_node->collapse (); | |
c33f4742 JH |
3651 | |
3652 | for (size_t k = 0; k < naccesses; k++) | |
3653 | { | |
74509b96 | 3654 | modref_access_node a = modref_access_node::stream_in (ib); |
c33f4742 | 3655 | if (nolto_ref_node) |
5c85f295 | 3656 | nolto_ref_node->insert_access (a, max_accesses, false); |
c33f4742 | 3657 | if (lto_ref_node) |
5c85f295 | 3658 | lto_ref_node->insert_access (a, max_accesses, false); |
c33f4742 | 3659 | } |
d119f34c JH |
3660 | } |
3661 | } | |
71dbabcc | 3662 | if (lto_ret) |
c33f4742 | 3663 | (*lto_ret)->cleanup (); |
71dbabcc | 3664 | if (nolto_ret) |
c33f4742 | 3665 | (*nolto_ret)->cleanup (); |
d119f34c JH |
3666 | } |
3667 | ||
85ebbabd JH |
3668 | /* Write ESUM to BP. */ |
3669 | ||
3670 | static void | |
3671 | modref_write_escape_summary (struct bitpack_d *bp, escape_summary *esum) | |
3672 | { | |
3673 | if (!esum) | |
3674 | { | |
3675 | bp_pack_var_len_unsigned (bp, 0); | |
3676 | return; | |
3677 | } | |
3678 | bp_pack_var_len_unsigned (bp, esum->esc.length ()); | |
3679 | unsigned int i; | |
3680 | escape_entry *ee; | |
3681 | FOR_EACH_VEC_ELT (esum->esc, i, ee) | |
3682 | { | |
b8ef019a | 3683 | bp_pack_var_len_int (bp, ee->parm_index); |
85ebbabd JH |
3684 | bp_pack_var_len_unsigned (bp, ee->arg); |
3685 | bp_pack_var_len_unsigned (bp, ee->min_flags); | |
3686 | bp_pack_value (bp, ee->direct, 1); | |
3687 | } | |
3688 | } | |
3689 | ||
3690 | /* Read escape summary for E from BP. */ | |
3691 | ||
3692 | static void | |
3693 | modref_read_escape_summary (struct bitpack_d *bp, cgraph_edge *e) | |
3694 | { | |
3695 | unsigned int n = bp_unpack_var_len_unsigned (bp); | |
3696 | if (!n) | |
3697 | return; | |
3698 | escape_summary *esum = escape_summaries->get_create (e); | |
3699 | esum->esc.reserve_exact (n); | |
3700 | for (unsigned int i = 0; i < n; i++) | |
3701 | { | |
3702 | escape_entry ee; | |
b8ef019a | 3703 | ee.parm_index = bp_unpack_var_len_int (bp); |
85ebbabd JH |
3704 | ee.arg = bp_unpack_var_len_unsigned (bp); |
3705 | ee.min_flags = bp_unpack_var_len_unsigned (bp); | |
3706 | ee.direct = bp_unpack_value (bp, 1); | |
3707 | esum->esc.quick_push (ee); | |
3708 | } | |
3709 | } | |
3710 | ||
d119f34c JH |
3711 | /* Callback for write_summary. */ |
3712 | ||
3713 | static void | |
3714 | modref_write () | |
3715 | { | |
3716 | struct output_block *ob = create_output_block (LTO_section_ipa_modref); | |
3717 | lto_symtab_encoder_t encoder = ob->decl_state->symtab_node_encoder; | |
3718 | unsigned int count = 0; | |
3719 | int i; | |
3720 | ||
71dbabcc | 3721 | if (!summaries_lto) |
d119f34c JH |
3722 | { |
3723 | streamer_write_uhwi (ob, 0); | |
3724 | streamer_write_char_stream (ob->main_stream, 0); | |
3725 | produce_asm (ob, NULL); | |
3726 | destroy_output_block (ob); | |
3727 | return; | |
3728 | } | |
3729 | ||
3730 | for (i = 0; i < lto_symtab_encoder_size (encoder); i++) | |
3731 | { | |
3732 | symtab_node *snode = lto_symtab_encoder_deref (encoder, i); | |
3733 | cgraph_node *cnode = dyn_cast <cgraph_node *> (snode); | |
71dbabcc | 3734 | modref_summary_lto *r; |
d119f34c JH |
3735 | |
3736 | if (cnode && cnode->definition && !cnode->alias | |
71dbabcc JH |
3737 | && (r = summaries_lto->get (cnode)) |
3738 | && r->useful_p (flags_from_decl_or_type (cnode->decl))) | |
d119f34c JH |
3739 | count++; |
3740 | } | |
3741 | streamer_write_uhwi (ob, count); | |
3742 | ||
3743 | for (i = 0; i < lto_symtab_encoder_size (encoder); i++) | |
3744 | { | |
3745 | symtab_node *snode = lto_symtab_encoder_deref (encoder, i); | |
3746 | cgraph_node *cnode = dyn_cast <cgraph_node *> (snode); | |
3747 | ||
3748 | if (cnode && cnode->definition && !cnode->alias) | |
3749 | { | |
71dbabcc | 3750 | modref_summary_lto *r = summaries_lto->get (cnode); |
d119f34c | 3751 | |
71dbabcc | 3752 | if (!r || !r->useful_p (flags_from_decl_or_type (cnode->decl))) |
d119f34c JH |
3753 | continue; |
3754 | ||
3755 | streamer_write_uhwi (ob, lto_symtab_encoder_encode (encoder, cnode)); | |
3756 | ||
85ebbabd JH |
3757 | streamer_write_uhwi (ob, r->arg_flags.length ()); |
3758 | for (unsigned int i = 0; i < r->arg_flags.length (); i++) | |
8da8ed43 | 3759 | streamer_write_uhwi (ob, r->arg_flags[i]); |
b8ef019a | 3760 | streamer_write_uhwi (ob, r->retslot_flags); |
a70c0512 | 3761 | streamer_write_uhwi (ob, r->static_chain_flags); |
85ebbabd | 3762 | |
56cb815b JH |
3763 | write_modref_records (r->loads, ob); |
3764 | write_modref_records (r->stores, ob); | |
74509b96 JH |
3765 | streamer_write_uhwi (ob, r->kills.length ()); |
3766 | for (auto kill : r->kills) | |
3767 | kill.stream_out (ob); | |
6cef01c3 JH |
3768 | |
3769 | struct bitpack_d bp = bitpack_create (ob->main_stream); | |
3770 | bp_pack_value (&bp, r->writes_errno, 1); | |
992644c3 | 3771 | bp_pack_value (&bp, r->side_effects, 1); |
a34edf9a JH |
3772 | bp_pack_value (&bp, r->nondeterministic, 1); |
3773 | bp_pack_value (&bp, r->calls_interposable, 1); | |
6cef01c3 JH |
3774 | if (!flag_wpa) |
3775 | { | |
3776 | for (cgraph_edge *e = cnode->indirect_calls; | |
3777 | e; e = e->next_callee) | |
3778 | { | |
3779 | class fnspec_summary *sum = fnspec_summaries->get (e); | |
3780 | bp_pack_value (&bp, sum != NULL, 1); | |
3781 | if (sum) | |
3782 | bp_pack_string (ob, &bp, sum->fnspec, true); | |
85ebbabd JH |
3783 | class escape_summary *esum = escape_summaries->get (e); |
3784 | modref_write_escape_summary (&bp,esum); | |
6cef01c3 JH |
3785 | } |
3786 | for (cgraph_edge *e = cnode->callees; e; e = e->next_callee) | |
3787 | { | |
3788 | class fnspec_summary *sum = fnspec_summaries->get (e); | |
3789 | bp_pack_value (&bp, sum != NULL, 1); | |
3790 | if (sum) | |
3791 | bp_pack_string (ob, &bp, sum->fnspec, true); | |
85ebbabd JH |
3792 | class escape_summary *esum = escape_summaries->get (e); |
3793 | modref_write_escape_summary (&bp,esum); | |
6cef01c3 JH |
3794 | } |
3795 | } | |
3796 | streamer_write_bitpack (&bp); | |
d119f34c JH |
3797 | } |
3798 | } | |
3799 | streamer_write_char_stream (ob->main_stream, 0); | |
3800 | produce_asm (ob, NULL); | |
3801 | destroy_output_block (ob); | |
3802 | } | |
3803 | ||
3804 | static void | |
3805 | read_section (struct lto_file_decl_data *file_data, const char *data, | |
3806 | size_t len) | |
3807 | { | |
3808 | const struct lto_function_header *header | |
3809 | = (const struct lto_function_header *) data; | |
3810 | const int cfg_offset = sizeof (struct lto_function_header); | |
3811 | const int main_offset = cfg_offset + header->cfg_size; | |
3812 | const int string_offset = main_offset + header->main_size; | |
3813 | struct data_in *data_in; | |
3814 | unsigned int i; | |
3815 | unsigned int f_count; | |
3816 | ||
3817 | lto_input_block ib ((const char *) data + main_offset, header->main_size, | |
3818 | file_data->mode_table); | |
3819 | ||
3820 | data_in | |
3821 | = lto_data_in_create (file_data, (const char *) data + string_offset, | |
3822 | header->string_size, vNULL); | |
3823 | f_count = streamer_read_uhwi (&ib); | |
3824 | for (i = 0; i < f_count; i++) | |
3825 | { | |
3826 | struct cgraph_node *node; | |
3827 | lto_symtab_encoder_t encoder; | |
3828 | ||
3829 | unsigned int index = streamer_read_uhwi (&ib); | |
3830 | encoder = file_data->symtab_node_encoder; | |
3831 | node = dyn_cast <cgraph_node *> (lto_symtab_encoder_deref (encoder, | |
3832 | index)); | |
3833 | ||
71dbabcc JH |
3834 | modref_summary *modref_sum = summaries |
3835 | ? summaries->get_create (node) : NULL; | |
3836 | modref_summary_lto *modref_sum_lto = summaries_lto | |
3837 | ? summaries_lto->get_create (node) | |
3838 | : NULL; | |
71dbabcc JH |
3839 | if (optimization_summaries) |
3840 | modref_sum = optimization_summaries->get_create (node); | |
3841 | ||
ea937e7d | 3842 | if (modref_sum) |
992644c3 JH |
3843 | { |
3844 | modref_sum->writes_errno = false; | |
3845 | modref_sum->side_effects = false; | |
a34edf9a JH |
3846 | modref_sum->nondeterministic = false; |
3847 | modref_sum->calls_interposable = false; | |
992644c3 | 3848 | } |
6cef01c3 | 3849 | if (modref_sum_lto) |
992644c3 JH |
3850 | { |
3851 | modref_sum_lto->writes_errno = false; | |
3852 | modref_sum_lto->side_effects = false; | |
a34edf9a JH |
3853 | modref_sum_lto->nondeterministic = false; |
3854 | modref_sum_lto->calls_interposable = false; | |
992644c3 | 3855 | } |
ea937e7d | 3856 | |
71dbabcc JH |
3857 | gcc_assert (!modref_sum || (!modref_sum->loads |
3858 | && !modref_sum->stores)); | |
3859 | gcc_assert (!modref_sum_lto || (!modref_sum_lto->loads | |
3860 | && !modref_sum_lto->stores)); | |
85ebbabd JH |
3861 | unsigned int args = streamer_read_uhwi (&ib); |
3862 | if (args && modref_sum) | |
3863 | modref_sum->arg_flags.reserve_exact (args); | |
3864 | if (args && modref_sum_lto) | |
3865 | modref_sum_lto->arg_flags.reserve_exact (args); | |
3866 | for (unsigned int i = 0; i < args; i++) | |
3867 | { | |
8da8ed43 | 3868 | eaf_flags_t flags = streamer_read_uhwi (&ib); |
85ebbabd JH |
3869 | if (modref_sum) |
3870 | modref_sum->arg_flags.quick_push (flags); | |
3871 | if (modref_sum_lto) | |
3872 | modref_sum_lto->arg_flags.quick_push (flags); | |
3873 | } | |
b8ef019a JH |
3874 | eaf_flags_t flags = streamer_read_uhwi (&ib); |
3875 | if (modref_sum) | |
3876 | modref_sum->retslot_flags = flags; | |
3877 | if (modref_sum_lto) | |
3878 | modref_sum_lto->retslot_flags = flags; | |
a70c0512 JH |
3879 | |
3880 | flags = streamer_read_uhwi (&ib); | |
3881 | if (modref_sum) | |
3882 | modref_sum->static_chain_flags = flags; | |
3883 | if (modref_sum_lto) | |
3884 | modref_sum_lto->static_chain_flags = flags; | |
3885 | ||
8632f8c6 | 3886 | read_modref_records (node->decl, &ib, data_in, |
56cb815b JH |
3887 | modref_sum ? &modref_sum->loads : NULL, |
3888 | modref_sum_lto ? &modref_sum_lto->loads : NULL); | |
8632f8c6 | 3889 | read_modref_records (node->decl, &ib, data_in, |
56cb815b JH |
3890 | modref_sum ? &modref_sum->stores : NULL, |
3891 | modref_sum_lto ? &modref_sum_lto->stores : NULL); | |
74509b96 JH |
3892 | int j = streamer_read_uhwi (&ib); |
3893 | if (j && modref_sum) | |
3894 | modref_sum->kills.reserve_exact (j); | |
3895 | if (j && modref_sum_lto) | |
3896 | modref_sum_lto->kills.reserve_exact (j); | |
3897 | for (int k = 0; k < j; k++) | |
3898 | { | |
3899 | modref_access_node a = modref_access_node::stream_in (&ib); | |
3900 | ||
3901 | if (modref_sum) | |
3902 | modref_sum->kills.quick_push (a); | |
3903 | if (modref_sum_lto) | |
3904 | modref_sum_lto->kills.quick_push (a); | |
3905 | } | |
6cef01c3 JH |
3906 | struct bitpack_d bp = streamer_read_bitpack (&ib); |
3907 | if (bp_unpack_value (&bp, 1)) | |
3908 | { | |
3909 | if (modref_sum) | |
3910 | modref_sum->writes_errno = true; | |
3911 | if (modref_sum_lto) | |
3912 | modref_sum_lto->writes_errno = true; | |
3913 | } | |
992644c3 JH |
3914 | if (bp_unpack_value (&bp, 1)) |
3915 | { | |
3916 | if (modref_sum) | |
3917 | modref_sum->side_effects = true; | |
3918 | if (modref_sum_lto) | |
3919 | modref_sum_lto->side_effects = true; | |
3920 | } | |
a34edf9a JH |
3921 | if (bp_unpack_value (&bp, 1)) |
3922 | { | |
3923 | if (modref_sum) | |
3924 | modref_sum->nondeterministic = true; | |
3925 | if (modref_sum_lto) | |
3926 | modref_sum_lto->nondeterministic = true; | |
3927 | } | |
3928 | if (bp_unpack_value (&bp, 1)) | |
3929 | { | |
3930 | if (modref_sum) | |
3931 | modref_sum->calls_interposable = true; | |
3932 | if (modref_sum_lto) | |
3933 | modref_sum_lto->calls_interposable = true; | |
3934 | } | |
6cef01c3 JH |
3935 | if (!flag_ltrans) |
3936 | { | |
3937 | for (cgraph_edge *e = node->indirect_calls; e; e = e->next_callee) | |
3938 | { | |
3939 | if (bp_unpack_value (&bp, 1)) | |
3940 | { | |
3941 | class fnspec_summary *sum = fnspec_summaries->get_create (e); | |
3942 | sum->fnspec = xstrdup (bp_unpack_string (data_in, &bp)); | |
3943 | } | |
85ebbabd | 3944 | modref_read_escape_summary (&bp, e); |
6cef01c3 JH |
3945 | } |
3946 | for (cgraph_edge *e = node->callees; e; e = e->next_callee) | |
3947 | { | |
3948 | if (bp_unpack_value (&bp, 1)) | |
3949 | { | |
3950 | class fnspec_summary *sum = fnspec_summaries->get_create (e); | |
3951 | sum->fnspec = xstrdup (bp_unpack_string (data_in, &bp)); | |
3952 | } | |
85ebbabd | 3953 | modref_read_escape_summary (&bp, e); |
6cef01c3 JH |
3954 | } |
3955 | } | |
e0040bc3 | 3956 | if (flag_ltrans) |
5aa91072 | 3957 | modref_sum->finalize (node->decl); |
d119f34c JH |
3958 | if (dump_file) |
3959 | { | |
3960 | fprintf (dump_file, "Read modref for %s\n", | |
3961 | node->dump_name ()); | |
71dbabcc JH |
3962 | if (modref_sum) |
3963 | modref_sum->dump (dump_file); | |
3964 | if (modref_sum_lto) | |
3965 | modref_sum_lto->dump (dump_file); | |
85ebbabd | 3966 | dump_modref_edge_summaries (dump_file, node, 4); |
d119f34c | 3967 | } |
d119f34c JH |
3968 | } |
3969 | ||
3970 | lto_free_section_data (file_data, LTO_section_ipa_modref, NULL, data, | |
3971 | len); | |
3972 | lto_data_in_delete (data_in); | |
3973 | } | |
3974 | ||
3975 | /* Callback for read_summary. */ | |
3976 | ||
3977 | static void | |
3978 | modref_read (void) | |
3979 | { | |
3980 | struct lto_file_decl_data **file_data_vec = lto_get_file_decl_data (); | |
3981 | struct lto_file_decl_data *file_data; | |
3982 | unsigned int j = 0; | |
3983 | ||
71dbabcc JH |
3984 | gcc_checking_assert (!optimization_summaries && !summaries && !summaries_lto); |
3985 | if (flag_ltrans) | |
3986 | optimization_summaries = modref_summaries::create_ggc (symtab); | |
3987 | else | |
3988 | { | |
3989 | if (flag_wpa || flag_incremental_link == INCREMENTAL_LINK_LTO) | |
3990 | summaries_lto = modref_summaries_lto::create_ggc (symtab); | |
3991 | if (!flag_wpa | |
3992 | || (flag_incremental_link == INCREMENTAL_LINK_LTO | |
3993 | && flag_fat_lto_objects)) | |
3994 | summaries = modref_summaries::create_ggc (symtab); | |
6cef01c3 JH |
3995 | if (!fnspec_summaries) |
3996 | fnspec_summaries = new fnspec_summaries_t (symtab); | |
85ebbabd JH |
3997 | if (!escape_summaries) |
3998 | escape_summaries = new escape_summaries_t (symtab); | |
71dbabcc | 3999 | } |
d119f34c JH |
4000 | |
4001 | while ((file_data = file_data_vec[j++])) | |
4002 | { | |
4003 | size_t len; | |
4004 | const char *data = lto_get_summary_section_data (file_data, | |
4005 | LTO_section_ipa_modref, | |
4006 | &len); | |
4007 | if (data) | |
4008 | read_section (file_data, data, len); | |
4009 | else | |
4010 | /* Fatal error here. We do not want to support compiling ltrans units | |
4011 | with different version of compiler or different flags than the WPA | |
4012 | unit, so this should never happen. */ | |
4013 | fatal_error (input_location, | |
4014 | "IPA modref summary is missing in input file"); | |
4015 | } | |
4016 | } | |
4017 | ||
85ebbabd JH |
4018 | /* Recompute arg_flags for param adjustments in INFO. */ |
4019 | ||
4020 | static void | |
8da8ed43 | 4021 | remap_arg_flags (auto_vec <eaf_flags_t> &arg_flags, clone_info *info) |
85ebbabd | 4022 | { |
8da8ed43 | 4023 | auto_vec<eaf_flags_t> old = arg_flags.copy (); |
85ebbabd JH |
4024 | int max = -1; |
4025 | size_t i; | |
4026 | ipa_adjusted_param *p; | |
4027 | ||
4028 | arg_flags.release (); | |
4029 | ||
4030 | FOR_EACH_VEC_SAFE_ELT (info->param_adjustments->m_adj_params, i, p) | |
4031 | { | |
4032 | int o = info->param_adjustments->get_original_index (i); | |
4033 | if (o >= 0 && (int)old.length () > o && old[o]) | |
4034 | max = i; | |
4035 | } | |
5962efe9 | 4036 | if (max >= 0) |
85ebbabd JH |
4037 | arg_flags.safe_grow_cleared (max + 1, true); |
4038 | FOR_EACH_VEC_SAFE_ELT (info->param_adjustments->m_adj_params, i, p) | |
4039 | { | |
4040 | int o = info->param_adjustments->get_original_index (i); | |
4041 | if (o >= 0 && (int)old.length () > o && old[o]) | |
4042 | arg_flags[i] = old[o]; | |
4043 | } | |
4044 | } | |
4045 | ||
02c80893 | 4046 | /* Update kills according to the parm map MAP. */ |
74509b96 JH |
4047 | |
4048 | static void | |
4049 | remap_kills (vec <modref_access_node> &kills, const vec <int> &map) | |
4050 | { | |
4051 | for (size_t i = 0; i < kills.length ();) | |
4052 | if (kills[i].parm_index >= 0) | |
4053 | { | |
4054 | if (kills[i].parm_index < (int)map.length () | |
4055 | && map[kills[i].parm_index] != MODREF_UNKNOWN_PARM) | |
4056 | { | |
4057 | kills[i].parm_index = map[kills[i].parm_index]; | |
4058 | i++; | |
4059 | } | |
4060 | else | |
4061 | kills.unordered_remove (i); | |
4062 | } | |
4063 | else | |
4064 | i++; | |
4065 | } | |
4066 | ||
c8fd2be1 JH |
4067 | /* If signature changed, update the summary. */ |
4068 | ||
fe90c504 JH |
4069 | static void |
4070 | update_signature (struct cgraph_node *node) | |
c8fd2be1 | 4071 | { |
ae7a23a3 JH |
4072 | clone_info *info = clone_info::get (node); |
4073 | if (!info || !info->param_adjustments) | |
fe90c504 JH |
4074 | return; |
4075 | ||
4076 | modref_summary *r = optimization_summaries | |
4077 | ? optimization_summaries->get (node) : NULL; | |
4078 | modref_summary_lto *r_lto = summaries_lto | |
4079 | ? summaries_lto->get (node) : NULL; | |
4080 | if (!r && !r_lto) | |
4081 | return; | |
c8fd2be1 JH |
4082 | if (dump_file) |
4083 | { | |
4084 | fprintf (dump_file, "Updating summary for %s from:\n", | |
4085 | node->dump_name ()); | |
85ebbabd JH |
4086 | if (r) |
4087 | r->dump (dump_file); | |
4088 | if (r_lto) | |
4089 | r_lto->dump (dump_file); | |
c8fd2be1 JH |
4090 | } |
4091 | ||
4092 | size_t i, max = 0; | |
4093 | ipa_adjusted_param *p; | |
4094 | ||
ae7a23a3 | 4095 | FOR_EACH_VEC_SAFE_ELT (info->param_adjustments->m_adj_params, i, p) |
c8fd2be1 | 4096 | { |
ae7a23a3 | 4097 | int idx = info->param_adjustments->get_original_index (i); |
c8fd2be1 JH |
4098 | if (idx > (int)max) |
4099 | max = idx; | |
4100 | } | |
4101 | ||
4102 | auto_vec <int, 32> map; | |
4103 | ||
5d2cedaa | 4104 | map.reserve (max + 1); |
c8fd2be1 | 4105 | for (i = 0; i <= max; i++) |
992644c3 | 4106 | map.quick_push (MODREF_UNKNOWN_PARM); |
ae7a23a3 | 4107 | FOR_EACH_VEC_SAFE_ELT (info->param_adjustments->m_adj_params, i, p) |
c8fd2be1 | 4108 | { |
ae7a23a3 | 4109 | int idx = info->param_adjustments->get_original_index (i); |
c8fd2be1 | 4110 | if (idx >= 0) |
2f61125f | 4111 | map[idx] = i; |
c8fd2be1 | 4112 | } |
fe90c504 JH |
4113 | if (r) |
4114 | { | |
4115 | r->loads->remap_params (&map); | |
4116 | r->stores->remap_params (&map); | |
74509b96 | 4117 | remap_kills (r->kills, map); |
85ebbabd JH |
4118 | if (r->arg_flags.length ()) |
4119 | remap_arg_flags (r->arg_flags, info); | |
fe90c504 JH |
4120 | } |
4121 | if (r_lto) | |
4122 | { | |
4123 | r_lto->loads->remap_params (&map); | |
4124 | r_lto->stores->remap_params (&map); | |
74509b96 | 4125 | remap_kills (r_lto->kills, map); |
85ebbabd JH |
4126 | if (r_lto->arg_flags.length ()) |
4127 | remap_arg_flags (r_lto->arg_flags, info); | |
fe90c504 | 4128 | } |
c8fd2be1 JH |
4129 | if (dump_file) |
4130 | { | |
4131 | fprintf (dump_file, "to:\n"); | |
fe90c504 | 4132 | if (r) |
6cef01c3 | 4133 | r->dump (dump_file); |
fe90c504 | 4134 | if (r_lto) |
6cef01c3 | 4135 | r_lto->dump (dump_file); |
c8fd2be1 | 4136 | } |
e0040bc3 | 4137 | if (r) |
5aa91072 | 4138 | r->finalize (node->decl); |
fe90c504 | 4139 | return; |
c8fd2be1 JH |
4140 | } |
4141 | ||
d119f34c JH |
4142 | /* Definition of the modref IPA pass. */ |
4143 | const pass_data pass_data_ipa_modref = | |
4144 | { | |
4145 | IPA_PASS, /* type */ | |
4146 | "modref", /* name */ | |
4147 | OPTGROUP_IPA, /* optinfo_flags */ | |
4148 | TV_IPA_MODREF, /* tv_id */ | |
4149 | 0, /* properties_required */ | |
4150 | 0, /* properties_provided */ | |
4151 | 0, /* properties_destroyed */ | |
4152 | 0, /* todo_flags_start */ | |
4153 | ( TODO_dump_symtab ), /* todo_flags_finish */ | |
4154 | }; | |
4155 | ||
4156 | class pass_ipa_modref : public ipa_opt_pass_d | |
4157 | { | |
4158 | public: | |
4159 | pass_ipa_modref (gcc::context *ctxt) | |
4160 | : ipa_opt_pass_d (pass_data_ipa_modref, ctxt, | |
4161 | modref_generate, /* generate_summary */ | |
4162 | modref_write, /* write_summary */ | |
4163 | modref_read, /* read_summary */ | |
4164 | modref_write, /* write_optimization_summary */ | |
4165 | modref_read, /* read_optimization_summary */ | |
4166 | NULL, /* stmt_fixup */ | |
4167 | 0, /* function_transform_todo_flags_start */ | |
fe90c504 | 4168 | NULL, /* function_transform */ |
d119f34c JH |
4169 | NULL) /* variable_transform */ |
4170 | {} | |
4171 | ||
4172 | /* opt_pass methods: */ | |
725793af DM |
4173 | opt_pass *clone () final override { return new pass_ipa_modref (m_ctxt); } |
4174 | bool gate (function *) final override | |
d119f34c JH |
4175 | { |
4176 | return true; | |
4177 | } | |
725793af | 4178 | unsigned int execute (function *) final override; |
d119f34c JH |
4179 | |
4180 | }; | |
4181 | ||
4182 | } | |
4183 | ||
2cadaa1f | 4184 | unsigned int pass_modref::execute (function *) |
d119f34c | 4185 | { |
2cadaa1f | 4186 | if (analyze_function (false)) |
494bdadf | 4187 | return execute_fixup_cfg (); |
d119f34c JH |
4188 | return 0; |
4189 | } | |
4190 | ||
4191 | gimple_opt_pass * | |
4192 | make_pass_modref (gcc::context *ctxt) | |
4193 | { | |
4194 | return new pass_modref (ctxt); | |
4195 | } | |
4196 | ||
4197 | ipa_opt_pass_d * | |
4198 | make_pass_ipa_modref (gcc::context *ctxt) | |
4199 | { | |
4200 | return new pass_ipa_modref (ctxt); | |
4201 | } | |
4202 | ||
18f0873d JH |
4203 | namespace { |
4204 | ||
d119f34c JH |
4205 | /* Skip edges from and to nodes without ipa_pure_const enabled. |
4206 | Ignore not available symbols. */ | |
4207 | ||
4208 | static bool | |
4209 | ignore_edge (struct cgraph_edge *e) | |
4210 | { | |
87d75a11 JH |
4211 | /* We merge summaries of inline clones into summaries of functions they |
4212 | are inlined to. For that reason the complete function bodies must | |
4213 | act as unit. */ | |
4214 | if (!e->inline_failed) | |
4215 | return false; | |
d119f34c | 4216 | enum availability avail; |
c87ff875 | 4217 | cgraph_node *callee = e->callee->ultimate_alias_target |
d119f34c JH |
4218 | (&avail, e->caller); |
4219 | ||
4220 | return (avail <= AVAIL_INTERPOSABLE | |
56cb815b | 4221 | || ((!optimization_summaries || !optimization_summaries->get (callee)) |
494bdadf | 4222 | && (!summaries_lto || !summaries_lto->get (callee)))); |
d119f34c JH |
4223 | } |
4224 | ||
8a2fd716 | 4225 | /* Compute parm_map for CALLEE_EDGE. */ |
d119f34c | 4226 | |
6cef01c3 | 4227 | static bool |
c34db4b6 | 4228 | compute_parm_map (cgraph_edge *callee_edge, vec<modref_parm_map> *parm_map) |
ada353b8 JH |
4229 | { |
4230 | class ipa_edge_args *args; | |
4231 | if (ipa_node_params_sum | |
4232 | && !callee_edge->call_stmt_cannot_inline_p | |
a4a3cdd0 | 4233 | && (args = ipa_edge_args_sum->get (callee_edge)) != NULL) |
ada353b8 JH |
4234 | { |
4235 | int i, count = ipa_get_cs_argument_count (args); | |
4236 | class ipa_node_params *caller_parms_info, *callee_pi; | |
4237 | class ipa_call_summary *es | |
4238 | = ipa_call_summaries->get (callee_edge); | |
4239 | cgraph_node *callee | |
c87ff875 | 4240 | = callee_edge->callee->ultimate_alias_target |
ada353b8 JH |
4241 | (NULL, callee_edge->caller); |
4242 | ||
a4a3cdd0 MJ |
4243 | caller_parms_info |
4244 | = ipa_node_params_sum->get (callee_edge->caller->inlined_to | |
4245 | ? callee_edge->caller->inlined_to | |
4246 | : callee_edge->caller); | |
4247 | callee_pi = ipa_node_params_sum->get (callee); | |
ada353b8 | 4248 | |
520d5ad3 | 4249 | (*parm_map).safe_grow_cleared (count, true); |
ada353b8 JH |
4250 | |
4251 | for (i = 0; i < count; i++) | |
4252 | { | |
4253 | if (es && es->param[i].points_to_local_or_readonly_memory) | |
4254 | { | |
1f3a3363 | 4255 | (*parm_map)[i].parm_index = MODREF_LOCAL_MEMORY_PARM; |
ada353b8 JH |
4256 | continue; |
4257 | } | |
4258 | ||
4259 | struct ipa_jump_func *jf | |
4260 | = ipa_get_ith_jump_func (args, i); | |
899c10c9 | 4261 | if (jf && callee_pi) |
ada353b8 JH |
4262 | { |
4263 | tree cst = ipa_value_from_jfunc (caller_parms_info, | |
4264 | jf, | |
4265 | ipa_get_type | |
4266 | (callee_pi, i)); | |
4267 | if (cst && points_to_local_or_readonly_memory_p (cst)) | |
4268 | { | |
1f3a3363 | 4269 | (*parm_map)[i].parm_index = MODREF_LOCAL_MEMORY_PARM; |
ada353b8 JH |
4270 | continue; |
4271 | } | |
4272 | } | |
4273 | if (jf && jf->type == IPA_JF_PASS_THROUGH) | |
4274 | { | |
c34db4b6 | 4275 | (*parm_map)[i].parm_index |
56cb815b | 4276 | = ipa_get_jf_pass_through_formal_id (jf); |
4d90edb9 JH |
4277 | if (ipa_get_jf_pass_through_operation (jf) == NOP_EXPR) |
4278 | { | |
4279 | (*parm_map)[i].parm_offset_known = true; | |
4280 | (*parm_map)[i].parm_offset = 0; | |
4281 | } | |
4282 | else if (ipa_get_jf_pass_through_operation (jf) | |
4283 | == POINTER_PLUS_EXPR | |
4284 | && ptrdiff_tree_p (ipa_get_jf_pass_through_operand (jf), | |
4285 | &(*parm_map)[i].parm_offset)) | |
4286 | (*parm_map)[i].parm_offset_known = true; | |
4287 | else | |
4288 | (*parm_map)[i].parm_offset_known = false; | |
ada353b8 JH |
4289 | continue; |
4290 | } | |
4291 | if (jf && jf->type == IPA_JF_ANCESTOR) | |
c34db4b6 JH |
4292 | { |
4293 | (*parm_map)[i].parm_index = ipa_get_jf_ancestor_formal_id (jf); | |
4294 | (*parm_map)[i].parm_offset_known = true; | |
c8fd2be1 JH |
4295 | gcc_checking_assert |
4296 | (!(ipa_get_jf_ancestor_offset (jf) & (BITS_PER_UNIT - 1))); | |
4297 | (*parm_map)[i].parm_offset | |
4298 | = ipa_get_jf_ancestor_offset (jf) >> LOG2_BITS_PER_UNIT; | |
85ebbabd | 4299 | } |
ada353b8 | 4300 | else |
c34db4b6 | 4301 | (*parm_map)[i].parm_index = -1; |
ada353b8 JH |
4302 | } |
4303 | if (dump_file) | |
4304 | { | |
4305 | fprintf (dump_file, " Parm map: "); | |
4306 | for (i = 0; i < count; i++) | |
c34db4b6 | 4307 | fprintf (dump_file, " %i", (*parm_map)[i].parm_index); |
ada353b8 JH |
4308 | fprintf (dump_file, "\n"); |
4309 | } | |
6cef01c3 | 4310 | return true; |
ada353b8 | 4311 | } |
6cef01c3 | 4312 | return false; |
ada353b8 JH |
4313 | } |
4314 | ||
85ebbabd JH |
4315 | /* Map used to translate escape infos. */ |
4316 | ||
4317 | struct escape_map | |
4318 | { | |
4319 | int parm_index; | |
4320 | bool direct; | |
4321 | }; | |
4322 | ||
b8ef019a | 4323 | /* Update escape map for E. */ |
85ebbabd JH |
4324 | |
4325 | static void | |
4326 | update_escape_summary_1 (cgraph_edge *e, | |
9851a163 JH |
4327 | vec <vec <escape_map>> &map, |
4328 | bool ignore_stores) | |
85ebbabd JH |
4329 | { |
4330 | escape_summary *sum = escape_summaries->get (e); | |
4331 | if (!sum) | |
4332 | return; | |
4333 | auto_vec <escape_entry> old = sum->esc.copy (); | |
4334 | sum->esc.release (); | |
4335 | ||
4336 | unsigned int i; | |
4337 | escape_entry *ee; | |
4338 | FOR_EACH_VEC_ELT (old, i, ee) | |
4339 | { | |
4340 | unsigned int j; | |
4341 | struct escape_map *em; | |
b8ef019a JH |
4342 | /* TODO: We do not have jump functions for return slots, so we |
4343 | never propagate them to outer function. */ | |
4344 | if (ee->parm_index >= (int)map.length () | |
4345 | || ee->parm_index < 0) | |
85ebbabd JH |
4346 | continue; |
4347 | FOR_EACH_VEC_ELT (map[ee->parm_index], j, em) | |
4348 | { | |
9851a163 JH |
4349 | int min_flags = ee->min_flags; |
4350 | if (ee->direct && !em->direct) | |
4351 | min_flags = deref_flags (min_flags, ignore_stores); | |
85ebbabd | 4352 | struct escape_entry entry = {em->parm_index, ee->arg, |
a70faf6e | 4353 | min_flags, |
85ebbabd JH |
4354 | ee->direct & em->direct}; |
4355 | sum->esc.safe_push (entry); | |
4356 | } | |
4357 | } | |
4358 | if (!sum->esc.length ()) | |
4359 | escape_summaries->remove (e); | |
4360 | } | |
4361 | ||
02c80893 | 4362 | /* Update escape map for NODE. */ |
85ebbabd JH |
4363 | |
4364 | static void | |
4365 | update_escape_summary (cgraph_node *node, | |
9851a163 JH |
4366 | vec <vec <escape_map>> &map, |
4367 | bool ignore_stores) | |
85ebbabd JH |
4368 | { |
4369 | if (!escape_summaries) | |
4370 | return; | |
4371 | for (cgraph_edge *e = node->indirect_calls; e; e = e->next_callee) | |
9851a163 | 4372 | update_escape_summary_1 (e, map, ignore_stores); |
85ebbabd JH |
4373 | for (cgraph_edge *e = node->callees; e; e = e->next_callee) |
4374 | { | |
4375 | if (!e->inline_failed) | |
9851a163 | 4376 | update_escape_summary (e->callee, map, ignore_stores); |
85ebbabd | 4377 | else |
9851a163 | 4378 | update_escape_summary_1 (e, map, ignore_stores); |
85ebbabd JH |
4379 | } |
4380 | } | |
4381 | ||
6cef01c3 JH |
4382 | /* Get parameter type from DECL. This is only safe for special cases |
4383 | like builtins we create fnspec for because the type match is checked | |
4384 | at fnspec creation time. */ | |
d119f34c | 4385 | |
6cef01c3 JH |
4386 | static tree |
4387 | get_parm_type (tree decl, unsigned int i) | |
ada353b8 | 4388 | { |
6cef01c3 | 4389 | tree t = TYPE_ARG_TYPES (TREE_TYPE (decl)); |
ada353b8 | 4390 | |
6cef01c3 JH |
4391 | for (unsigned int p = 0; p < i; p++) |
4392 | t = TREE_CHAIN (t); | |
4393 | return TREE_VALUE (t); | |
4394 | } | |
4395 | ||
4396 | /* Return access mode for argument I of call E with FNSPEC. */ | |
4397 | ||
4398 | static modref_access_node | |
4399 | get_access_for_fnspec (cgraph_edge *e, attr_fnspec &fnspec, | |
4400 | unsigned int i, modref_parm_map &map) | |
4401 | { | |
4402 | tree size = NULL_TREE; | |
4403 | unsigned int size_arg; | |
4404 | ||
4405 | if (!fnspec.arg_specified_p (i)) | |
4406 | ; | |
4407 | else if (fnspec.arg_max_access_size_given_by_arg_p (i, &size_arg)) | |
ada353b8 | 4408 | { |
6cef01c3 JH |
4409 | cgraph_node *node = e->caller->inlined_to |
4410 | ? e->caller->inlined_to : e->caller; | |
a4a3cdd0 MJ |
4411 | ipa_node_params *caller_parms_info = ipa_node_params_sum->get (node); |
4412 | ipa_edge_args *args = ipa_edge_args_sum->get (e); | |
6cef01c3 JH |
4413 | struct ipa_jump_func *jf = ipa_get_ith_jump_func (args, size_arg); |
4414 | ||
4415 | if (jf) | |
4416 | size = ipa_value_from_jfunc (caller_parms_info, jf, | |
4417 | get_parm_type (e->callee->decl, size_arg)); | |
ada353b8 | 4418 | } |
6cef01c3 JH |
4419 | else if (fnspec.arg_access_size_given_by_type_p (i)) |
4420 | size = TYPE_SIZE_UNIT (get_parm_type (e->callee->decl, i)); | |
4421 | modref_access_node a = {0, -1, -1, | |
4422 | map.parm_offset, map.parm_index, | |
5c85f295 | 4423 | map.parm_offset_known, 0}; |
6cef01c3 JH |
4424 | poly_int64 size_hwi; |
4425 | if (size | |
4426 | && poly_int_tree_p (size, &size_hwi) | |
4427 | && coeffs_in_range_p (size_hwi, 0, | |
4428 | HOST_WIDE_INT_MAX / BITS_PER_UNIT)) | |
ada353b8 | 4429 | { |
6cef01c3 JH |
4430 | a.size = -1; |
4431 | a.max_size = size_hwi << LOG2_BITS_PER_UNIT; | |
ada353b8 | 4432 | } |
6cef01c3 JH |
4433 | return a; |
4434 | } | |
4435 | ||
09a4ffb7 JH |
4436 | /* Collapse loads and return true if something changed. */ |
4437 | static bool | |
4438 | collapse_loads (modref_summary *cur_summary, | |
4439 | modref_summary_lto *cur_summary_lto) | |
4440 | { | |
4441 | bool changed = false; | |
4442 | ||
4443 | if (cur_summary && !cur_summary->loads->every_base) | |
4444 | { | |
4445 | cur_summary->loads->collapse (); | |
4446 | changed = true; | |
4447 | } | |
4448 | if (cur_summary_lto | |
4449 | && !cur_summary_lto->loads->every_base) | |
4450 | { | |
4451 | cur_summary_lto->loads->collapse (); | |
4452 | changed = true; | |
4453 | } | |
4454 | return changed; | |
4455 | } | |
4456 | ||
4457 | /* Collapse loads and return true if something changed. */ | |
4458 | ||
4459 | static bool | |
4460 | collapse_stores (modref_summary *cur_summary, | |
4461 | modref_summary_lto *cur_summary_lto) | |
4462 | { | |
4463 | bool changed = false; | |
4464 | ||
4465 | if (cur_summary && !cur_summary->stores->every_base) | |
4466 | { | |
4467 | cur_summary->stores->collapse (); | |
4468 | changed = true; | |
4469 | } | |
4470 | if (cur_summary_lto | |
4471 | && !cur_summary_lto->stores->every_base) | |
4472 | { | |
4473 | cur_summary_lto->stores->collapse (); | |
4474 | changed = true; | |
4475 | } | |
4476 | return changed; | |
4477 | } | |
4478 | ||
6cef01c3 JH |
4479 | /* Call E in NODE with ECF_FLAGS has no summary; update MODREF_SUMMARY and |
4480 | CUR_SUMMARY_LTO accordingly. Return true if something changed. */ | |
4481 | ||
4482 | static bool | |
4483 | propagate_unknown_call (cgraph_node *node, | |
4484 | cgraph_edge *e, int ecf_flags, | |
85ebbabd | 4485 | modref_summary *cur_summary, |
8d3abf42 JH |
4486 | modref_summary_lto *cur_summary_lto, |
4487 | bool nontrivial_scc) | |
6cef01c3 JH |
4488 | { |
4489 | bool changed = false; | |
6cef01c3 JH |
4490 | class fnspec_summary *fnspec_sum = fnspec_summaries->get (e); |
4491 | auto_vec <modref_parm_map, 32> parm_map; | |
992644c3 JH |
4492 | bool looping; |
4493 | ||
4494 | if (e->callee | |
4495 | && builtin_safe_for_const_function_p (&looping, e->callee->decl)) | |
4496 | { | |
8d3abf42 | 4497 | if (looping && cur_summary && !cur_summary->side_effects) |
992644c3 JH |
4498 | { |
4499 | cur_summary->side_effects = true; | |
4500 | changed = true; | |
4501 | } | |
8d3abf42 | 4502 | if (looping && cur_summary_lto && !cur_summary_lto->side_effects) |
992644c3 JH |
4503 | { |
4504 | cur_summary_lto->side_effects = true; | |
4505 | changed = true; | |
4506 | } | |
4507 | return changed; | |
4508 | } | |
4509 | ||
8d3abf42 JH |
4510 | if (!(ecf_flags & (ECF_CONST | ECF_NOVOPS | ECF_PURE)) |
4511 | || (ecf_flags & ECF_LOOPING_CONST_OR_PURE) | |
4512 | || nontrivial_scc) | |
992644c3 JH |
4513 | { |
4514 | if (cur_summary && !cur_summary->side_effects) | |
4515 | { | |
4516 | cur_summary->side_effects = true; | |
4517 | changed = true; | |
4518 | } | |
4519 | if (cur_summary_lto && !cur_summary_lto->side_effects) | |
4520 | { | |
4521 | cur_summary_lto->side_effects = true; | |
4522 | changed = true; | |
4523 | } | |
a34edf9a JH |
4524 | if (cur_summary && !cur_summary->nondeterministic |
4525 | && !ignore_nondeterminism_p (node->decl, ecf_flags)) | |
4526 | { | |
4527 | cur_summary->nondeterministic = true; | |
4528 | changed = true; | |
4529 | } | |
4530 | if (cur_summary_lto && !cur_summary_lto->nondeterministic | |
4531 | && !ignore_nondeterminism_p (node->decl, ecf_flags)) | |
4532 | { | |
4533 | cur_summary_lto->nondeterministic = true; | |
4534 | changed = true; | |
4535 | } | |
992644c3 | 4536 | } |
8d3abf42 JH |
4537 | if (ecf_flags & (ECF_CONST | ECF_NOVOPS)) |
4538 | return changed; | |
992644c3 | 4539 | |
6cef01c3 JH |
4540 | if (fnspec_sum |
4541 | && compute_parm_map (e, &parm_map)) | |
4542 | { | |
4543 | attr_fnspec fnspec (fnspec_sum->fnspec); | |
4544 | ||
4545 | gcc_checking_assert (fnspec.known_p ()); | |
4546 | if (fnspec.global_memory_read_p ()) | |
4547 | collapse_loads (cur_summary, cur_summary_lto); | |
4548 | else | |
4549 | { | |
4550 | tree t = TYPE_ARG_TYPES (TREE_TYPE (e->callee->decl)); | |
4551 | for (unsigned i = 0; i < parm_map.length () && t; | |
4552 | i++, t = TREE_CHAIN (t)) | |
4553 | if (!POINTER_TYPE_P (TREE_VALUE (t))) | |
4554 | ; | |
4555 | else if (!fnspec.arg_specified_p (i) | |
4556 | || fnspec.arg_maybe_read_p (i)) | |
4557 | { | |
4558 | modref_parm_map map = parm_map[i]; | |
1f3a3363 | 4559 | if (map.parm_index == MODREF_LOCAL_MEMORY_PARM) |
6cef01c3 | 4560 | continue; |
1f3a3363 | 4561 | if (map.parm_index == MODREF_UNKNOWN_PARM) |
6cef01c3 JH |
4562 | { |
4563 | collapse_loads (cur_summary, cur_summary_lto); | |
4564 | break; | |
4565 | } | |
4566 | if (cur_summary) | |
4567 | changed |= cur_summary->loads->insert | |
8632f8c6 JH |
4568 | (node->decl, 0, 0, |
4569 | get_access_for_fnspec (e, fnspec, i, map), false); | |
6cef01c3 JH |
4570 | if (cur_summary_lto) |
4571 | changed |= cur_summary_lto->loads->insert | |
8632f8c6 JH |
4572 | (node->decl, 0, 0, |
4573 | get_access_for_fnspec (e, fnspec, i, map), false); | |
6cef01c3 JH |
4574 | } |
4575 | } | |
4576 | if (ignore_stores_p (node->decl, ecf_flags)) | |
4577 | ; | |
4578 | else if (fnspec.global_memory_written_p ()) | |
4579 | collapse_stores (cur_summary, cur_summary_lto); | |
4580 | else | |
4581 | { | |
4582 | tree t = TYPE_ARG_TYPES (TREE_TYPE (e->callee->decl)); | |
4583 | for (unsigned i = 0; i < parm_map.length () && t; | |
4584 | i++, t = TREE_CHAIN (t)) | |
4585 | if (!POINTER_TYPE_P (TREE_VALUE (t))) | |
4586 | ; | |
4587 | else if (!fnspec.arg_specified_p (i) | |
4588 | || fnspec.arg_maybe_written_p (i)) | |
4589 | { | |
4590 | modref_parm_map map = parm_map[i]; | |
1f3a3363 | 4591 | if (map.parm_index == MODREF_LOCAL_MEMORY_PARM) |
6cef01c3 | 4592 | continue; |
1f3a3363 | 4593 | if (map.parm_index == MODREF_UNKNOWN_PARM) |
6cef01c3 JH |
4594 | { |
4595 | collapse_stores (cur_summary, cur_summary_lto); | |
4596 | break; | |
4597 | } | |
4598 | if (cur_summary) | |
4599 | changed |= cur_summary->stores->insert | |
8632f8c6 JH |
4600 | (node->decl, 0, 0, |
4601 | get_access_for_fnspec (e, fnspec, i, map), false); | |
6cef01c3 JH |
4602 | if (cur_summary_lto) |
4603 | changed |= cur_summary_lto->stores->insert | |
8632f8c6 JH |
4604 | (node->decl, 0, 0, |
4605 | get_access_for_fnspec (e, fnspec, i, map), false); | |
6cef01c3 JH |
4606 | } |
4607 | } | |
4608 | if (fnspec.errno_maybe_written_p () && flag_errno_math) | |
4609 | { | |
4610 | if (cur_summary && !cur_summary->writes_errno) | |
4611 | { | |
4612 | cur_summary->writes_errno = true; | |
4613 | changed = true; | |
4614 | } | |
4615 | if (cur_summary_lto && !cur_summary_lto->writes_errno) | |
4616 | { | |
4617 | cur_summary_lto->writes_errno = true; | |
4618 | changed = true; | |
4619 | } | |
4620 | } | |
4621 | return changed; | |
4622 | } | |
85ebbabd JH |
4623 | if (dump_file) |
4624 | fprintf (dump_file, " collapsing loads\n"); | |
4625 | changed |= collapse_loads (cur_summary, cur_summary_lto); | |
4626 | if (!ignore_stores_p (node->decl, ecf_flags)) | |
6cef01c3 JH |
4627 | { |
4628 | if (dump_file) | |
85ebbabd JH |
4629 | fprintf (dump_file, " collapsing stores\n"); |
4630 | changed |= collapse_stores (cur_summary, cur_summary_lto); | |
6cef01c3 | 4631 | } |
85ebbabd | 4632 | return changed; |
ada353b8 | 4633 | } |
d119f34c | 4634 | |
02c80893 | 4635 | /* Maybe remove summaries of NODE pointed to by CUR_SUMMARY_PTR |
85ebbabd JH |
4636 | and CUR_SUMMARY_LTO_PTR if they are useless according to ECF_FLAGS. */ |
4637 | ||
4638 | static void | |
4639 | remove_useless_summaries (cgraph_node *node, | |
4640 | modref_summary **cur_summary_ptr, | |
4641 | modref_summary_lto **cur_summary_lto_ptr, | |
4642 | int ecf_flags) | |
4643 | { | |
4644 | if (*cur_summary_ptr && !(*cur_summary_ptr)->useful_p (ecf_flags, false)) | |
4645 | { | |
4646 | optimization_summaries->remove (node); | |
4647 | *cur_summary_ptr = NULL; | |
4648 | } | |
4649 | if (*cur_summary_lto_ptr | |
4650 | && !(*cur_summary_lto_ptr)->useful_p (ecf_flags, false)) | |
4651 | { | |
4652 | summaries_lto->remove (node); | |
4653 | *cur_summary_lto_ptr = NULL; | |
4654 | } | |
4655 | } | |
4656 | ||
4657 | /* Perform iterative dataflow on SCC component starting in COMPONENT_NODE | |
4658 | and propagate loads/stores. */ | |
ada353b8 | 4659 | |
494bdadf | 4660 | static bool |
ada353b8 JH |
4661 | modref_propagate_in_scc (cgraph_node *component_node) |
4662 | { | |
4663 | bool changed = true; | |
5c85f295 | 4664 | bool first = true; |
ada353b8 JH |
4665 | int iteration = 0; |
4666 | ||
4667 | while (changed) | |
4668 | { | |
8d3abf42 JH |
4669 | bool nontrivial_scc |
4670 | = ((struct ipa_dfs_info *) component_node->aux)->next_cycle; | |
ada353b8 JH |
4671 | changed = false; |
4672 | for (struct cgraph_node *cur = component_node; cur; | |
d119f34c JH |
4673 | cur = ((struct ipa_dfs_info *) cur->aux)->next_cycle) |
4674 | { | |
ada353b8 | 4675 | cgraph_node *node = cur->inlined_to ? cur->inlined_to : cur; |
71dbabcc JH |
4676 | modref_summary *cur_summary = optimization_summaries |
4677 | ? optimization_summaries->get (node) | |
4678 | : NULL; | |
4679 | modref_summary_lto *cur_summary_lto = summaries_lto | |
4680 | ? summaries_lto->get (node) | |
4681 | : NULL; | |
4682 | ||
4683 | if (!cur_summary && !cur_summary_lto) | |
ada353b8 JH |
4684 | continue; |
4685 | ||
85ebbabd JH |
4686 | int cur_ecf_flags = flags_from_decl_or_type (node->decl); |
4687 | ||
ada353b8 JH |
4688 | if (dump_file) |
4689 | fprintf (dump_file, " Processing %s%s%s\n", | |
4690 | cur->dump_name (), | |
4691 | TREE_READONLY (cur->decl) ? " (const)" : "", | |
4692 | DECL_PURE_P (cur->decl) ? " (pure)" : ""); | |
d119f34c | 4693 | |
d119f34c JH |
4694 | for (cgraph_edge *e = cur->indirect_calls; e; e = e->next_callee) |
4695 | { | |
6cef01c3 | 4696 | if (dump_file) |
8d3abf42 | 4697 | fprintf (dump_file, " Indirect call\n"); |
85ebbabd | 4698 | if (propagate_unknown_call |
6cef01c3 | 4699 | (node, e, e->indirect_info->ecf_flags, |
8d3abf42 JH |
4700 | cur_summary, cur_summary_lto, |
4701 | nontrivial_scc)) | |
85ebbabd JH |
4702 | { |
4703 | changed = true; | |
4704 | remove_useless_summaries (node, &cur_summary, | |
4705 | &cur_summary_lto, | |
4706 | cur_ecf_flags); | |
4707 | if (!cur_summary && !cur_summary_lto) | |
4708 | break; | |
4709 | } | |
d119f34c JH |
4710 | } |
4711 | ||
71dbabcc | 4712 | if (!cur_summary && !cur_summary_lto) |
ada353b8 JH |
4713 | continue; |
4714 | ||
d119f34c JH |
4715 | for (cgraph_edge *callee_edge = cur->callees; callee_edge; |
4716 | callee_edge = callee_edge->next_callee) | |
4717 | { | |
4718 | int flags = flags_from_decl_or_type (callee_edge->callee->decl); | |
71dbabcc JH |
4719 | modref_summary *callee_summary = NULL; |
4720 | modref_summary_lto *callee_summary_lto = NULL; | |
d119f34c JH |
4721 | struct cgraph_node *callee; |
4722 | ||
8d3abf42 JH |
4723 | if (!callee_edge->inline_failed |
4724 | || ((flags & (ECF_CONST | ECF_NOVOPS)) | |
4725 | && !(flags & ECF_LOOPING_CONST_OR_PURE))) | |
d119f34c JH |
4726 | continue; |
4727 | ||
d119f34c JH |
4728 | /* Get the callee and its summary. */ |
4729 | enum availability avail; | |
c87ff875 | 4730 | callee = callee_edge->callee->ultimate_alias_target |
d119f34c JH |
4731 | (&avail, cur); |
4732 | ||
ada353b8 JH |
4733 | /* It is not necessary to re-process calls outside of the |
4734 | SCC component. */ | |
4735 | if (iteration > 0 | |
4736 | && (!callee->aux | |
4737 | || ((struct ipa_dfs_info *)cur->aux)->scc_no | |
4738 | != ((struct ipa_dfs_info *)callee->aux)->scc_no)) | |
4739 | continue; | |
4740 | ||
4741 | if (dump_file) | |
4742 | fprintf (dump_file, " Call to %s\n", | |
4743 | callee_edge->callee->dump_name ()); | |
d119f34c JH |
4744 | |
4745 | bool ignore_stores = ignore_stores_p (cur->decl, flags); | |
4746 | ||
71dbabcc | 4747 | if (avail <= AVAIL_INTERPOSABLE) |
d119f34c | 4748 | { |
6cef01c3 JH |
4749 | if (dump_file) |
4750 | fprintf (dump_file, " Call target interposable" | |
4751 | " or not available\n"); | |
4752 | changed |= propagate_unknown_call | |
4753 | (node, callee_edge, flags, | |
8d3abf42 JH |
4754 | cur_summary, cur_summary_lto, |
4755 | nontrivial_scc); | |
6cef01c3 JH |
4756 | if (!cur_summary && !cur_summary_lto) |
4757 | break; | |
4758 | continue; | |
71dbabcc JH |
4759 | } |
4760 | ||
4761 | /* We don't know anything about CALLEE, hence we cannot tell | |
4762 | anything about the entire component. */ | |
4763 | ||
4764 | if (cur_summary | |
4765 | && !(callee_summary = optimization_summaries->get (callee))) | |
4766 | { | |
6cef01c3 JH |
4767 | if (dump_file) |
4768 | fprintf (dump_file, " No call target summary\n"); | |
4769 | changed |= propagate_unknown_call | |
4770 | (node, callee_edge, flags, | |
8d3abf42 JH |
4771 | cur_summary, NULL, |
4772 | nontrivial_scc); | |
71dbabcc JH |
4773 | } |
4774 | if (cur_summary_lto | |
4775 | && !(callee_summary_lto = summaries_lto->get (callee))) | |
4776 | { | |
6cef01c3 JH |
4777 | if (dump_file) |
4778 | fprintf (dump_file, " No call target summary\n"); | |
4779 | changed |= propagate_unknown_call | |
4780 | (node, callee_edge, flags, | |
8d3abf42 JH |
4781 | NULL, cur_summary_lto, |
4782 | nontrivial_scc); | |
d119f34c JH |
4783 | } |
4784 | ||
8d3abf42 JH |
4785 | if (callee_summary && !cur_summary->side_effects |
4786 | && (callee_summary->side_effects | |
4787 | || callee_edge->recursive_p ())) | |
4788 | { | |
4789 | cur_summary->side_effects = true; | |
4790 | changed = true; | |
4791 | } | |
4792 | if (callee_summary_lto && !cur_summary_lto->side_effects | |
4793 | && (callee_summary_lto->side_effects | |
4794 | || callee_edge->recursive_p ())) | |
4795 | { | |
4796 | cur_summary_lto->side_effects = true; | |
4797 | changed = true; | |
4798 | } | |
a34edf9a JH |
4799 | if (callee_summary && !cur_summary->nondeterministic |
4800 | && callee_summary->nondeterministic | |
4801 | && !ignore_nondeterminism_p (cur->decl, flags)) | |
4802 | { | |
4803 | cur_summary->nondeterministic = true; | |
4804 | changed = true; | |
4805 | } | |
4806 | if (callee_summary_lto && !cur_summary_lto->nondeterministic | |
4807 | && callee_summary_lto->nondeterministic | |
4808 | && !ignore_nondeterminism_p (cur->decl, flags)) | |
4809 | { | |
4810 | cur_summary_lto->nondeterministic = true; | |
4811 | changed = true; | |
4812 | } | |
8d3abf42 JH |
4813 | if (flags & (ECF_CONST | ECF_NOVOPS)) |
4814 | continue; | |
4815 | ||
ada353b8 JH |
4816 | /* We can not safely optimize based on summary of callee if it |
4817 | does not always bind to current def: it is possible that | |
4818 | memory load was optimized out earlier which may not happen in | |
4819 | the interposed variant. */ | |
4820 | if (!callee_edge->binds_to_current_def_p ()) | |
4821 | { | |
a34edf9a JH |
4822 | if (cur_summary && !cur_summary->calls_interposable) |
4823 | { | |
4824 | cur_summary->calls_interposable = true; | |
4825 | changed = true; | |
4826 | } | |
4827 | if (cur_summary_lto && !cur_summary_lto->calls_interposable) | |
4828 | { | |
4829 | cur_summary_lto->calls_interposable = true; | |
4830 | changed = true; | |
4831 | } | |
ada353b8 JH |
4832 | if (dump_file) |
4833 | fprintf (dump_file, " May not bind local;" | |
4834 | " collapsing loads\n"); | |
4835 | } | |
4836 | ||
4837 | ||
c34db4b6 | 4838 | auto_vec <modref_parm_map, 32> parm_map; |
1f3a3363 JH |
4839 | modref_parm_map chain_map; |
4840 | /* TODO: Once we get jump functions for static chains we could | |
4841 | compute this. */ | |
4842 | chain_map.parm_index = MODREF_UNKNOWN_PARM; | |
ada353b8 JH |
4843 | |
4844 | compute_parm_map (callee_edge, &parm_map); | |
c33f4742 | 4845 | |
d119f34c | 4846 | /* Merge in callee's information. */ |
71dbabcc JH |
4847 | if (callee_summary) |
4848 | { | |
56cb815b | 4849 | changed |= cur_summary->loads->merge |
8632f8c6 JH |
4850 | (node->decl, callee_summary->loads, |
4851 | &parm_map, &chain_map, !first); | |
56cb815b | 4852 | if (!ignore_stores) |
6cef01c3 JH |
4853 | { |
4854 | changed |= cur_summary->stores->merge | |
8632f8c6 JH |
4855 | (node->decl, callee_summary->stores, |
4856 | &parm_map, &chain_map, !first); | |
6cef01c3 JH |
4857 | if (!cur_summary->writes_errno |
4858 | && callee_summary->writes_errno) | |
4859 | { | |
4860 | cur_summary->writes_errno = true; | |
4861 | changed = true; | |
4862 | } | |
4863 | } | |
71dbabcc JH |
4864 | } |
4865 | if (callee_summary_lto) | |
4866 | { | |
56cb815b | 4867 | changed |= cur_summary_lto->loads->merge |
8632f8c6 JH |
4868 | (node->decl, callee_summary_lto->loads, |
4869 | &parm_map, &chain_map, !first); | |
56cb815b | 4870 | if (!ignore_stores) |
6cef01c3 JH |
4871 | { |
4872 | changed |= cur_summary_lto->stores->merge | |
8632f8c6 JH |
4873 | (node->decl, callee_summary_lto->stores, |
4874 | &parm_map, &chain_map, !first); | |
6cef01c3 JH |
4875 | if (!cur_summary_lto->writes_errno |
4876 | && callee_summary_lto->writes_errno) | |
4877 | { | |
4878 | cur_summary_lto->writes_errno = true; | |
4879 | changed = true; | |
4880 | } | |
4881 | } | |
71dbabcc | 4882 | } |
85ebbabd JH |
4883 | if (changed) |
4884 | remove_useless_summaries (node, &cur_summary, | |
4885 | &cur_summary_lto, | |
4886 | cur_ecf_flags); | |
4887 | if (!cur_summary && !cur_summary_lto) | |
4888 | break; | |
ada353b8 | 4889 | if (dump_file && changed) |
71dbabcc JH |
4890 | { |
4891 | if (cur_summary) | |
4892 | cur_summary->dump (dump_file); | |
4893 | if (cur_summary_lto) | |
4894 | cur_summary_lto->dump (dump_file); | |
85ebbabd | 4895 | dump_modref_edge_summaries (dump_file, node, 4); |
71dbabcc | 4896 | } |
d119f34c JH |
4897 | } |
4898 | } | |
ada353b8 | 4899 | iteration++; |
5c85f295 | 4900 | first = false; |
ada353b8 | 4901 | } |
ada353b8 | 4902 | if (dump_file) |
85ebbabd JH |
4903 | fprintf (dump_file, |
4904 | "Propagation finished in %i iterations\n", iteration); | |
494bdadf JH |
4905 | bool pureconst = false; |
4906 | for (struct cgraph_node *cur = component_node; cur; | |
4907 | cur = ((struct ipa_dfs_info *) cur->aux)->next_cycle) | |
4908 | if (!cur->inlined_to && opt_for_fn (cur->decl, flag_ipa_pure_const)) | |
4909 | { | |
4910 | modref_summary *summary = optimization_summaries | |
4911 | ? optimization_summaries->get (cur) | |
4912 | : NULL; | |
4913 | modref_summary_lto *summary_lto = summaries_lto | |
4914 | ? summaries_lto->get (cur) | |
4915 | : NULL; | |
1b62cddc | 4916 | if (summary && !summary->stores->every_base && !summary->stores->bases |
a34edf9a | 4917 | && !summary->nondeterministic) |
494bdadf | 4918 | { |
a34edf9a JH |
4919 | if (!summary->loads->every_base && !summary->loads->bases |
4920 | && !summary->calls_interposable) | |
494bdadf JH |
4921 | pureconst |= ipa_make_function_const |
4922 | (cur, summary->side_effects, false); | |
4923 | else | |
4924 | pureconst |= ipa_make_function_pure | |
4925 | (cur, summary->side_effects, false); | |
4926 | } | |
4927 | if (summary_lto && !summary_lto->stores->every_base | |
a34edf9a | 4928 | && !summary_lto->stores->bases && !summary_lto->nondeterministic) |
494bdadf | 4929 | { |
a34edf9a JH |
4930 | if (!summary_lto->loads->every_base && !summary_lto->loads->bases |
4931 | && !summary_lto->calls_interposable) | |
494bdadf JH |
4932 | pureconst |= ipa_make_function_const |
4933 | (cur, summary_lto->side_effects, false); | |
4934 | else | |
4935 | pureconst |= ipa_make_function_pure | |
4936 | (cur, summary_lto->side_effects, false); | |
4937 | } | |
4938 | } | |
4939 | return pureconst; | |
85ebbabd JH |
4940 | } |
4941 | ||
4942 | /* Dump results of propagation in SCC rooted in COMPONENT_NODE. */ | |
4943 | ||
4944 | static void | |
4945 | modref_propagate_dump_scc (cgraph_node *component_node) | |
4946 | { | |
4947 | for (struct cgraph_node *cur = component_node; cur; | |
4948 | cur = ((struct ipa_dfs_info *) cur->aux)->next_cycle) | |
4949 | if (!cur->inlined_to) | |
4950 | { | |
4951 | modref_summary *cur_summary = optimization_summaries | |
4952 | ? optimization_summaries->get (cur) | |
4953 | : NULL; | |
4954 | modref_summary_lto *cur_summary_lto = summaries_lto | |
4955 | ? summaries_lto->get (cur) | |
4956 | : NULL; | |
4957 | ||
4958 | fprintf (dump_file, "Propagated modref for %s%s%s\n", | |
4959 | cur->dump_name (), | |
4960 | TREE_READONLY (cur->decl) ? " (const)" : "", | |
4961 | DECL_PURE_P (cur->decl) ? " (pure)" : ""); | |
4962 | if (optimization_summaries) | |
4963 | { | |
4964 | if (cur_summary) | |
4965 | cur_summary->dump (dump_file); | |
4966 | else | |
4967 | fprintf (dump_file, " Not tracked\n"); | |
4968 | } | |
4969 | if (summaries_lto) | |
4970 | { | |
4971 | if (cur_summary_lto) | |
4972 | cur_summary_lto->dump (dump_file); | |
4973 | else | |
4974 | fprintf (dump_file, " Not tracked (lto)\n"); | |
4975 | } | |
4976 | } | |
4977 | } | |
4978 | ||
16e85390 JH |
4979 | /* Determine EAF flags know for call E with CALLEE_ECF_FLAGS and ARG. */ |
4980 | ||
4981 | int | |
4982 | implicit_eaf_flags_for_edge_and_arg (cgraph_edge *e, int callee_ecf_flags, | |
4983 | bool ignore_stores, int arg) | |
4984 | { | |
4985 | /* Returning the value is already accounted to at local propagation. */ | |
4986 | int implicit_flags = EAF_NOT_RETURNED_DIRECTLY | |
4987 | | EAF_NOT_RETURNED_INDIRECTLY; | |
4988 | if (ignore_stores) | |
4989 | implicit_flags |= ignore_stores_eaf_flags; | |
4990 | if (callee_ecf_flags & ECF_PURE) | |
4991 | implicit_flags |= implicit_pure_eaf_flags; | |
4992 | if (callee_ecf_flags & (ECF_CONST | ECF_NOVOPS)) | |
4993 | implicit_flags |= implicit_const_eaf_flags; | |
4994 | class fnspec_summary *fnspec_sum = fnspec_summaries->get (e); | |
4995 | if (fnspec_sum) | |
4996 | { | |
4997 | attr_fnspec fnspec (fnspec_sum->fnspec); | |
4998 | implicit_flags |= fnspec.arg_eaf_flags (arg); | |
4999 | } | |
5000 | return implicit_flags; | |
5001 | } | |
5002 | ||
85ebbabd JH |
5003 | /* Process escapes in SUM and merge SUMMARY to CUR_SUMMARY |
5004 | and SUMMARY_LTO to CUR_SUMMARY_LTO. | |
5005 | Return true if something changed. */ | |
5006 | ||
5007 | static bool | |
5008 | modref_merge_call_site_flags (escape_summary *sum, | |
5009 | modref_summary *cur_summary, | |
5010 | modref_summary_lto *cur_summary_lto, | |
5011 | modref_summary *summary, | |
5012 | modref_summary_lto *summary_lto, | |
4341b1b1 | 5013 | tree caller, |
f6f704fd JH |
5014 | cgraph_edge *e, |
5015 | int caller_ecf_flags, | |
5016 | int callee_ecf_flags, | |
5017 | bool binds_to_current_def) | |
85ebbabd JH |
5018 | { |
5019 | escape_entry *ee; | |
5020 | unsigned int i; | |
5021 | bool changed = false; | |
f6f704fd | 5022 | bool ignore_stores = ignore_stores_p (caller, callee_ecf_flags); |
85ebbabd | 5023 | |
fcbf94a5 JH |
5024 | /* Return early if we have no useful info to propagate. */ |
5025 | if ((!cur_summary | |
5026 | || (!cur_summary->arg_flags.length () | |
5027 | && !cur_summary->static_chain_flags | |
5028 | && !cur_summary->retslot_flags)) | |
5029 | && (!cur_summary_lto | |
5030 | || (!cur_summary_lto->arg_flags.length () | |
5031 | && !cur_summary_lto->static_chain_flags | |
5032 | && !cur_summary_lto->retslot_flags))) | |
85ebbabd JH |
5033 | return false; |
5034 | ||
5035 | FOR_EACH_VEC_ELT (sum->esc, i, ee) | |
ada353b8 | 5036 | { |
85ebbabd JH |
5037 | int flags = 0; |
5038 | int flags_lto = 0; | |
16e85390 JH |
5039 | int implicit_flags = implicit_eaf_flags_for_edge_and_arg |
5040 | (e, callee_ecf_flags, ignore_stores, ee->arg); | |
85ebbabd JH |
5041 | |
5042 | if (summary && ee->arg < summary->arg_flags.length ()) | |
5043 | flags = summary->arg_flags[ee->arg]; | |
5044 | if (summary_lto | |
5045 | && ee->arg < summary_lto->arg_flags.length ()) | |
5046 | flags_lto = summary_lto->arg_flags[ee->arg]; | |
5047 | if (!ee->direct) | |
5048 | { | |
5049 | flags = deref_flags (flags, ignore_stores); | |
5050 | flags_lto = deref_flags (flags_lto, ignore_stores); | |
5051 | } | |
f6f704fd JH |
5052 | if (ignore_stores) |
5053 | implicit_flags |= ignore_stores_eaf_flags; | |
5054 | if (callee_ecf_flags & ECF_PURE) | |
5055 | implicit_flags |= implicit_pure_eaf_flags; | |
5056 | if (callee_ecf_flags & (ECF_CONST | ECF_NOVOPS)) | |
5057 | implicit_flags |= implicit_const_eaf_flags; | |
5058 | class fnspec_summary *fnspec_sum = fnspec_summaries->get (e); | |
5059 | if (fnspec_sum) | |
85ebbabd | 5060 | { |
f6f704fd | 5061 | attr_fnspec fnspec (fnspec_sum->fnspec); |
e2dd12ab | 5062 | implicit_flags |= fnspec.arg_eaf_flags (ee->arg); |
f6f704fd JH |
5063 | } |
5064 | if (!ee->direct) | |
5065 | implicit_flags = deref_flags (implicit_flags, ignore_stores); | |
5066 | flags |= implicit_flags; | |
5067 | flags_lto |= implicit_flags; | |
5068 | if (!binds_to_current_def && (flags || flags_lto)) | |
5069 | { | |
5070 | flags = interposable_eaf_flags (flags, implicit_flags); | |
5071 | flags_lto = interposable_eaf_flags (flags_lto, implicit_flags); | |
85ebbabd | 5072 | } |
3350e59f | 5073 | if (!(flags & EAF_UNUSED) |
b8ef019a | 5074 | && cur_summary && ee->parm_index < (int)cur_summary->arg_flags.length ()) |
85ebbabd | 5075 | { |
1f3a3363 | 5076 | eaf_flags_t &f = ee->parm_index == MODREF_RETSLOT_PARM |
b8ef019a | 5077 | ? cur_summary->retslot_flags |
1f3a3363 | 5078 | : ee->parm_index == MODREF_STATIC_CHAIN_PARM |
a70c0512 | 5079 | ? cur_summary->static_chain_flags |
b8ef019a | 5080 | : cur_summary->arg_flags[ee->parm_index]; |
85ebbabd JH |
5081 | if ((f & flags) != f) |
5082 | { | |
4341b1b1 | 5083 | f = remove_useless_eaf_flags |
f6f704fd | 5084 | (f & flags, caller_ecf_flags, |
4341b1b1 | 5085 | VOID_TYPE_P (TREE_TYPE (TREE_TYPE (caller)))); |
85ebbabd JH |
5086 | changed = true; |
5087 | } | |
5088 | } | |
3350e59f JH |
5089 | if (!(flags_lto & EAF_UNUSED) |
5090 | && cur_summary_lto | |
b8ef019a | 5091 | && ee->parm_index < (int)cur_summary_lto->arg_flags.length ()) |
85ebbabd | 5092 | { |
1f3a3363 | 5093 | eaf_flags_t &f = ee->parm_index == MODREF_RETSLOT_PARM |
b8ef019a | 5094 | ? cur_summary_lto->retslot_flags |
1f3a3363 | 5095 | : ee->parm_index == MODREF_STATIC_CHAIN_PARM |
a70c0512 | 5096 | ? cur_summary_lto->static_chain_flags |
b8ef019a | 5097 | : cur_summary_lto->arg_flags[ee->parm_index]; |
85ebbabd JH |
5098 | if ((f & flags_lto) != f) |
5099 | { | |
4341b1b1 | 5100 | f = remove_useless_eaf_flags |
f6f704fd | 5101 | (f & flags_lto, caller_ecf_flags, |
4341b1b1 | 5102 | VOID_TYPE_P (TREE_TYPE (TREE_TYPE (caller)))); |
85ebbabd JH |
5103 | changed = true; |
5104 | } | |
5105 | } | |
5106 | } | |
5107 | return changed; | |
5108 | } | |
5109 | ||
5110 | /* Perform iterative dataflow on SCC component starting in COMPONENT_NODE | |
5111 | and propagate arg flags. */ | |
5112 | ||
5113 | static void | |
5114 | modref_propagate_flags_in_scc (cgraph_node *component_node) | |
5115 | { | |
5116 | bool changed = true; | |
5117 | int iteration = 0; | |
5118 | ||
5119 | while (changed) | |
5120 | { | |
5121 | changed = false; | |
ada353b8 | 5122 | for (struct cgraph_node *cur = component_node; cur; |
d119f34c | 5123 | cur = ((struct ipa_dfs_info *) cur->aux)->next_cycle) |
85ebbabd JH |
5124 | { |
5125 | cgraph_node *node = cur->inlined_to ? cur->inlined_to : cur; | |
5126 | modref_summary *cur_summary = optimization_summaries | |
5127 | ? optimization_summaries->get (node) | |
5128 | : NULL; | |
5129 | modref_summary_lto *cur_summary_lto = summaries_lto | |
5130 | ? summaries_lto->get (node) | |
5131 | : NULL; | |
5132 | ||
5133 | if (!cur_summary && !cur_summary_lto) | |
5134 | continue; | |
f6f704fd | 5135 | int caller_ecf_flags = flags_from_decl_or_type (cur->decl); |
85ebbabd JH |
5136 | |
5137 | if (dump_file) | |
5138 | fprintf (dump_file, " Processing %s%s%s\n", | |
ada353b8 JH |
5139 | cur->dump_name (), |
5140 | TREE_READONLY (cur->decl) ? " (const)" : "", | |
5141 | DECL_PURE_P (cur->decl) ? " (pure)" : ""); | |
85ebbabd JH |
5142 | |
5143 | for (cgraph_edge *e = cur->indirect_calls; e; e = e->next_callee) | |
5144 | { | |
5145 | escape_summary *sum = escape_summaries->get (e); | |
5146 | ||
5147 | if (!sum || (e->indirect_info->ecf_flags | |
5148 | & (ECF_CONST | ECF_NOVOPS))) | |
5149 | continue; | |
5150 | ||
5151 | changed |= modref_merge_call_site_flags | |
5152 | (sum, cur_summary, cur_summary_lto, | |
4341b1b1 | 5153 | NULL, NULL, |
f6f704fd JH |
5154 | node->decl, |
5155 | e, | |
5156 | caller_ecf_flags, | |
5157 | e->indirect_info->ecf_flags, | |
5158 | false); | |
85ebbabd JH |
5159 | } |
5160 | ||
5161 | if (!cur_summary && !cur_summary_lto) | |
5162 | continue; | |
5163 | ||
5164 | for (cgraph_edge *callee_edge = cur->callees; callee_edge; | |
5165 | callee_edge = callee_edge->next_callee) | |
5166 | { | |
4341b1b1 JH |
5167 | int ecf_flags = flags_from_decl_or_type |
5168 | (callee_edge->callee->decl); | |
85ebbabd JH |
5169 | modref_summary *callee_summary = NULL; |
5170 | modref_summary_lto *callee_summary_lto = NULL; | |
5171 | struct cgraph_node *callee; | |
5172 | ||
4341b1b1 | 5173 | if (ecf_flags & (ECF_CONST | ECF_NOVOPS) |
85ebbabd JH |
5174 | || !callee_edge->inline_failed) |
5175 | continue; | |
16e85390 | 5176 | |
85ebbabd JH |
5177 | /* Get the callee and its summary. */ |
5178 | enum availability avail; | |
c87ff875 | 5179 | callee = callee_edge->callee->ultimate_alias_target |
85ebbabd JH |
5180 | (&avail, cur); |
5181 | ||
5182 | /* It is not necessary to re-process calls outside of the | |
5183 | SCC component. */ | |
5184 | if (iteration > 0 | |
5185 | && (!callee->aux | |
5186 | || ((struct ipa_dfs_info *)cur->aux)->scc_no | |
5187 | != ((struct ipa_dfs_info *)callee->aux)->scc_no)) | |
5188 | continue; | |
5189 | ||
5190 | escape_summary *sum = escape_summaries->get (callee_edge); | |
5191 | if (!sum) | |
5192 | continue; | |
5193 | ||
5194 | if (dump_file) | |
5195 | fprintf (dump_file, " Call to %s\n", | |
5196 | callee_edge->callee->dump_name ()); | |
5197 | ||
5198 | if (avail <= AVAIL_INTERPOSABLE | |
5199 | || callee_edge->call_stmt_cannot_inline_p) | |
5200 | ; | |
5201 | else | |
5202 | { | |
5203 | if (cur_summary) | |
5204 | callee_summary = optimization_summaries->get (callee); | |
5205 | if (cur_summary_lto) | |
5206 | callee_summary_lto = summaries_lto->get (callee); | |
5207 | } | |
5208 | changed |= modref_merge_call_site_flags | |
5209 | (sum, cur_summary, cur_summary_lto, | |
5210 | callee_summary, callee_summary_lto, | |
f6f704fd JH |
5211 | node->decl, |
5212 | callee_edge, | |
5213 | caller_ecf_flags, | |
5214 | ecf_flags, | |
5215 | callee->binds_to_current_def_p ()); | |
85ebbabd JH |
5216 | if (dump_file && changed) |
5217 | { | |
5218 | if (cur_summary) | |
5219 | cur_summary->dump (dump_file); | |
5220 | if (cur_summary_lto) | |
5221 | cur_summary_lto->dump (dump_file); | |
5222 | } | |
5223 | } | |
5224 | } | |
5225 | iteration++; | |
5226 | } | |
5227 | if (dump_file) | |
5228 | fprintf (dump_file, | |
5229 | "Propagation of flags finished in %i iterations\n", iteration); | |
ada353b8 JH |
5230 | } |
5231 | ||
18f0873d JH |
5232 | } /* ANON namespace. */ |
5233 | ||
5234 | /* Call EDGE was inlined; merge summary from callee to the caller. */ | |
5235 | ||
5236 | void | |
5237 | ipa_merge_modref_summary_after_inlining (cgraph_edge *edge) | |
5238 | { | |
5239 | if (!summaries && !summaries_lto) | |
5240 | return; | |
5241 | ||
5242 | struct cgraph_node *to = (edge->caller->inlined_to | |
5243 | ? edge->caller->inlined_to : edge->caller); | |
5244 | class modref_summary *to_info = summaries ? summaries->get (to) : NULL; | |
5245 | class modref_summary_lto *to_info_lto = summaries_lto | |
5246 | ? summaries_lto->get (to) : NULL; | |
5247 | ||
5248 | if (!to_info && !to_info_lto) | |
5249 | { | |
5250 | if (summaries) | |
5251 | summaries->remove (edge->callee); | |
5252 | if (summaries_lto) | |
5253 | summaries_lto->remove (edge->callee); | |
5254 | remove_modref_edge_summaries (edge->callee); | |
5255 | return; | |
5256 | } | |
5257 | ||
5258 | class modref_summary *callee_info = summaries ? summaries->get (edge->callee) | |
5259 | : NULL; | |
5260 | class modref_summary_lto *callee_info_lto | |
5261 | = summaries_lto ? summaries_lto->get (edge->callee) : NULL; | |
5262 | int flags = flags_from_decl_or_type (edge->callee->decl); | |
16e85390 | 5263 | /* Combine in outer flags. */ |
2cadaa1f JH |
5264 | cgraph_node *n; |
5265 | for (n = edge->caller; n->inlined_to; n = n->callers->caller) | |
5266 | flags |= flags_from_decl_or_type (n->decl); | |
5267 | flags |= flags_from_decl_or_type (n->decl); | |
18f0873d JH |
5268 | bool ignore_stores = ignore_stores_p (edge->caller->decl, flags); |
5269 | ||
5270 | if (!callee_info && to_info) | |
5271 | { | |
5272 | if (!(flags & (ECF_CONST | ECF_NOVOPS))) | |
5273 | to_info->loads->collapse (); | |
5274 | if (!ignore_stores) | |
5275 | to_info->stores->collapse (); | |
5276 | } | |
5277 | if (!callee_info_lto && to_info_lto) | |
5278 | { | |
5279 | if (!(flags & (ECF_CONST | ECF_NOVOPS))) | |
5280 | to_info_lto->loads->collapse (); | |
5281 | if (!ignore_stores) | |
5282 | to_info_lto->stores->collapse (); | |
5283 | } | |
aabb9a26 JH |
5284 | /* Merge side effects and non-determinism. |
5285 | PURE/CONST flags makes functions deterministic and if there is | |
5286 | no LOOPING_CONST_OR_PURE they also have no side effects. */ | |
5287 | if (!(flags & (ECF_CONST | ECF_NOVOPS | ECF_PURE)) | |
5288 | || (flags & ECF_LOOPING_CONST_OR_PURE)) | |
5289 | { | |
5290 | if (to_info) | |
5291 | { | |
5292 | if (!callee_info || callee_info->side_effects) | |
5293 | to_info->side_effects = true; | |
5294 | if ((!callee_info || callee_info->nondeterministic) | |
5295 | && !ignore_nondeterminism_p (edge->caller->decl, flags)) | |
5296 | to_info->nondeterministic = true; | |
5297 | } | |
5298 | if (to_info_lto) | |
5299 | { | |
5300 | if (!callee_info_lto || callee_info_lto->side_effects) | |
5301 | to_info_lto->side_effects = true; | |
5302 | if ((!callee_info_lto || callee_info_lto->nondeterministic) | |
5303 | && !ignore_nondeterminism_p (edge->caller->decl, flags)) | |
5304 | to_info_lto->nondeterministic = true; | |
5305 | } | |
5306 | } | |
18f0873d JH |
5307 | if (callee_info || callee_info_lto) |
5308 | { | |
5309 | auto_vec <modref_parm_map, 32> parm_map; | |
1f3a3363 JH |
5310 | modref_parm_map chain_map; |
5311 | /* TODO: Once we get jump functions for static chains we could | |
74a4ece0 | 5312 | compute parm_index. */ |
18f0873d JH |
5313 | |
5314 | compute_parm_map (edge, &parm_map); | |
5315 | ||
5316 | if (!ignore_stores) | |
5317 | { | |
5318 | if (to_info && callee_info) | |
8632f8c6 | 5319 | to_info->stores->merge (to->decl, callee_info->stores, &parm_map, |
1f3a3363 | 5320 | &chain_map, false); |
18f0873d | 5321 | if (to_info_lto && callee_info_lto) |
8632f8c6 JH |
5322 | to_info_lto->stores->merge (to->decl, callee_info_lto->stores, |
5323 | &parm_map, &chain_map, false); | |
18f0873d JH |
5324 | } |
5325 | if (!(flags & (ECF_CONST | ECF_NOVOPS))) | |
5326 | { | |
5327 | if (to_info && callee_info) | |
8632f8c6 | 5328 | to_info->loads->merge (to->decl, callee_info->loads, &parm_map, |
1f3a3363 | 5329 | &chain_map, false); |
18f0873d | 5330 | if (to_info_lto && callee_info_lto) |
8632f8c6 JH |
5331 | to_info_lto->loads->merge (to->decl, callee_info_lto->loads, |
5332 | &parm_map, &chain_map, false); | |
18f0873d JH |
5333 | } |
5334 | } | |
5335 | ||
5336 | /* Now merge escape summaries. | |
02c80893 JJ |
5337 | For every escape to the callee we need to merge callee flags |
5338 | and remap callee's escapes. */ | |
18f0873d JH |
5339 | class escape_summary *sum = escape_summaries->get (edge); |
5340 | int max_escape = -1; | |
5341 | escape_entry *ee; | |
5342 | unsigned int i; | |
5343 | ||
5344 | if (sum && !(flags & (ECF_CONST | ECF_NOVOPS))) | |
5345 | FOR_EACH_VEC_ELT (sum->esc, i, ee) | |
5346 | if ((int)ee->arg > max_escape) | |
5347 | max_escape = ee->arg; | |
5348 | ||
5349 | auto_vec <vec <struct escape_map>, 32> emap (max_escape + 1); | |
5350 | emap.safe_grow (max_escape + 1, true); | |
5351 | for (i = 0; (int)i < max_escape + 1; i++) | |
5352 | emap[i] = vNULL; | |
5353 | ||
5354 | if (sum && !(flags & (ECF_CONST | ECF_NOVOPS))) | |
5355 | FOR_EACH_VEC_ELT (sum->esc, i, ee) | |
5356 | { | |
5357 | bool needed = false; | |
16e85390 JH |
5358 | int implicit_flags = implicit_eaf_flags_for_edge_and_arg |
5359 | (edge, flags, ignore_stores, | |
5360 | ee->arg); | |
5361 | if (!ee->direct) | |
5362 | implicit_flags = deref_flags (implicit_flags, ignore_stores); | |
18f0873d JH |
5363 | if (to_info && (int)to_info->arg_flags.length () > ee->parm_index) |
5364 | { | |
5365 | int flags = callee_info | |
5366 | && callee_info->arg_flags.length () > ee->arg | |
5367 | ? callee_info->arg_flags[ee->arg] : 0; | |
5368 | if (!ee->direct) | |
5369 | flags = deref_flags (flags, ignore_stores); | |
16e85390 JH |
5370 | flags |= ee->min_flags | implicit_flags; |
5371 | eaf_flags_t &f = ee->parm_index == MODREF_RETSLOT_PARM | |
5372 | ? to_info->retslot_flags | |
5373 | : ee->parm_index == MODREF_STATIC_CHAIN_PARM | |
5374 | ? to_info->static_chain_flags | |
5375 | : to_info->arg_flags[ee->parm_index]; | |
5376 | f &= flags; | |
5377 | if (f) | |
18f0873d JH |
5378 | needed = true; |
5379 | } | |
5380 | if (to_info_lto | |
62af7d94 | 5381 | && (int)to_info_lto->arg_flags.length () > ee->parm_index) |
18f0873d JH |
5382 | { |
5383 | int flags = callee_info_lto | |
5384 | && callee_info_lto->arg_flags.length () > ee->arg | |
5385 | ? callee_info_lto->arg_flags[ee->arg] : 0; | |
5386 | if (!ee->direct) | |
5387 | flags = deref_flags (flags, ignore_stores); | |
16e85390 JH |
5388 | flags |= ee->min_flags | implicit_flags; |
5389 | eaf_flags_t &f = ee->parm_index == MODREF_RETSLOT_PARM | |
5390 | ? to_info_lto->retslot_flags | |
5391 | : ee->parm_index == MODREF_STATIC_CHAIN_PARM | |
5392 | ? to_info_lto->static_chain_flags | |
5393 | : to_info_lto->arg_flags[ee->parm_index]; | |
5394 | f &= flags; | |
5395 | if (f) | |
18f0873d JH |
5396 | needed = true; |
5397 | } | |
5398 | struct escape_map entry = {ee->parm_index, ee->direct}; | |
5399 | if (needed) | |
5400 | emap[ee->arg].safe_push (entry); | |
5401 | } | |
5402 | update_escape_summary (edge->callee, emap, ignore_stores); | |
5403 | for (i = 0; (int)i < max_escape + 1; i++) | |
5404 | emap[i].release (); | |
5405 | if (sum) | |
5406 | escape_summaries->remove (edge); | |
5407 | ||
5408 | if (summaries) | |
5409 | { | |
5410 | if (to_info && !to_info->useful_p (flags)) | |
5411 | { | |
5412 | if (dump_file) | |
5413 | fprintf (dump_file, "Removed mod-ref summary for %s\n", | |
5414 | to->dump_name ()); | |
5415 | summaries->remove (to); | |
5416 | to_info = NULL; | |
5417 | } | |
5418 | else if (to_info && dump_file) | |
5419 | { | |
5420 | if (dump_file) | |
5421 | fprintf (dump_file, "Updated mod-ref summary for %s\n", | |
5422 | to->dump_name ()); | |
5423 | to_info->dump (dump_file); | |
5424 | } | |
5425 | if (callee_info) | |
5426 | summaries->remove (edge->callee); | |
5427 | } | |
5428 | if (summaries_lto) | |
5429 | { | |
5430 | if (to_info_lto && !to_info_lto->useful_p (flags)) | |
5431 | { | |
5432 | if (dump_file) | |
5433 | fprintf (dump_file, "Removed mod-ref summary for %s\n", | |
5434 | to->dump_name ()); | |
5435 | summaries_lto->remove (to); | |
8c693978 | 5436 | to_info_lto = NULL; |
18f0873d JH |
5437 | } |
5438 | else if (to_info_lto && dump_file) | |
5439 | { | |
5440 | if (dump_file) | |
5441 | fprintf (dump_file, "Updated mod-ref summary for %s\n", | |
5442 | to->dump_name ()); | |
5443 | to_info_lto->dump (dump_file); | |
18f0873d JH |
5444 | } |
5445 | if (callee_info_lto) | |
5446 | summaries_lto->remove (edge->callee); | |
5447 | } | |
5448 | if (!to_info && !to_info_lto) | |
5449 | remove_modref_edge_summaries (to); | |
5450 | return; | |
5451 | } | |
5452 | ||
ada353b8 JH |
5453 | /* Run the IPA pass. This will take a function's summaries and calls and |
5454 | construct new summaries which represent a transitive closure. So that | |
5455 | summary of an analyzed function contains information about the loads and | |
5456 | stores that the function or any function that it calls does. */ | |
5457 | ||
5458 | unsigned int | |
5459 | pass_ipa_modref::execute (function *) | |
5460 | { | |
71dbabcc | 5461 | if (!summaries && !summaries_lto) |
ada353b8 | 5462 | return 0; |
494bdadf | 5463 | bool pureconst = false; |
ada353b8 | 5464 | |
71dbabcc JH |
5465 | if (optimization_summaries) |
5466 | ggc_delete (optimization_summaries); | |
5467 | optimization_summaries = summaries; | |
5468 | summaries = NULL; | |
5469 | ||
ada353b8 JH |
5470 | struct cgraph_node **order = XCNEWVEC (struct cgraph_node *, |
5471 | symtab->cgraph_count); | |
5472 | int order_pos; | |
5473 | order_pos = ipa_reduced_postorder (order, true, ignore_edge); | |
5474 | int i; | |
5475 | ||
5476 | /* Iterate over all strongly connected components in post-order. */ | |
5477 | for (i = 0; i < order_pos; i++) | |
5478 | { | |
5479 | /* Get the component's representative. That's just any node in the | |
5480 | component from which we can traverse the entire component. */ | |
5481 | struct cgraph_node *component_node = order[i]; | |
5482 | ||
5483 | if (dump_file) | |
5484 | fprintf (dump_file, "\n\nStart of SCC component\n"); | |
5485 | ||
494bdadf | 5486 | pureconst |= modref_propagate_in_scc (component_node); |
85ebbabd | 5487 | modref_propagate_flags_in_scc (component_node); |
e0040bc3 JH |
5488 | if (optimization_summaries) |
5489 | for (struct cgraph_node *cur = component_node; cur; | |
5490 | cur = ((struct ipa_dfs_info *) cur->aux)->next_cycle) | |
5491 | if (modref_summary *sum = optimization_summaries->get (cur)) | |
5aa91072 | 5492 | sum->finalize (cur->decl); |
85ebbabd JH |
5493 | if (dump_file) |
5494 | modref_propagate_dump_scc (component_node); | |
d119f34c | 5495 | } |
fe90c504 JH |
5496 | cgraph_node *node; |
5497 | FOR_EACH_FUNCTION (node) | |
5498 | update_signature (node); | |
71dbabcc JH |
5499 | if (summaries_lto) |
5500 | ((modref_summaries_lto *)summaries_lto)->propagated = true; | |
d119f34c | 5501 | ipa_free_postorder_info (); |
a0e6e49d | 5502 | free (order); |
6cef01c3 JH |
5503 | delete fnspec_summaries; |
5504 | fnspec_summaries = NULL; | |
85ebbabd JH |
5505 | delete escape_summaries; |
5506 | escape_summaries = NULL; | |
494bdadf | 5507 | |
02c80893 | 5508 | /* If we possibly made constructors const/pure we may need to remove |
494bdadf JH |
5509 | them. */ |
5510 | return pureconst ? TODO_remove_functions : 0; | |
d119f34c JH |
5511 | } |
5512 | ||
39b3b1bd JH |
5513 | /* Summaries must stay alive until end of compilation. */ |
5514 | ||
5515 | void | |
d5148d4f | 5516 | ipa_modref_cc_finalize () |
39b3b1bd | 5517 | { |
71dbabcc JH |
5518 | if (optimization_summaries) |
5519 | ggc_delete (optimization_summaries); | |
5520 | optimization_summaries = NULL; | |
71dbabcc | 5521 | if (summaries_lto) |
85ebbabd JH |
5522 | ggc_delete (summaries_lto); |
5523 | summaries_lto = NULL; | |
6cef01c3 JH |
5524 | if (fnspec_summaries) |
5525 | delete fnspec_summaries; | |
5526 | fnspec_summaries = NULL; | |
85ebbabd JH |
5527 | if (escape_summaries) |
5528 | delete escape_summaries; | |
5529 | escape_summaries = NULL; | |
39b3b1bd JH |
5530 | } |
5531 | ||
d119f34c | 5532 | #include "gt-ipa-modref.h" |