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a49a878f | 1 | /* Top level of GCC compilers (cc1, cc1plus, etc.) |
2 | Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, | |
fee1d116 | 3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. |
a49a878f | 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 2, 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 COPYING. If not, write to the Free | |
67ce556b | 19 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
20 | 02110-1301, USA. */ | |
a49a878f | 21 | |
22 | /* This is the top level of cc1/c++. | |
23 | It parses command args, opens files, invokes the various passes | |
24 | in the proper order, and counts the time used by each. | |
25 | Error messages and low-level interface to malloc also handled here. */ | |
26 | ||
27 | #include "config.h" | |
28 | #undef FLOAT /* This is for hpux. They should change hpux. */ | |
29 | #undef FFS /* Some systems define this in param.h. */ | |
30 | #include "system.h" | |
31 | #include "coretypes.h" | |
32 | #include "tm.h" | |
33 | #include <signal.h> | |
34 | ||
35 | #ifdef HAVE_SYS_RESOURCE_H | |
36 | # include <sys/resource.h> | |
37 | #endif | |
38 | ||
39 | #ifdef HAVE_SYS_TIMES_H | |
40 | # include <sys/times.h> | |
41 | #endif | |
42 | ||
43 | #include "line-map.h" | |
44 | #include "input.h" | |
45 | #include "tree.h" | |
46 | #include "rtl.h" | |
47 | #include "tm_p.h" | |
48 | #include "flags.h" | |
49 | #include "insn-attr.h" | |
50 | #include "insn-config.h" | |
51 | #include "insn-flags.h" | |
52 | #include "hard-reg-set.h" | |
53 | #include "recog.h" | |
54 | #include "output.h" | |
55 | #include "except.h" | |
56 | #include "function.h" | |
57 | #include "toplev.h" | |
58 | #include "expr.h" | |
59 | #include "basic-block.h" | |
60 | #include "intl.h" | |
61 | #include "ggc.h" | |
62 | #include "graph.h" | |
a49a878f | 63 | #include "regs.h" |
64 | #include "timevar.h" | |
65 | #include "diagnostic.h" | |
66 | #include "params.h" | |
67 | #include "reload.h" | |
68 | #include "dwarf2asm.h" | |
69 | #include "integrate.h" | |
70 | #include "real.h" | |
71 | #include "debug.h" | |
72 | #include "target.h" | |
73 | #include "langhooks.h" | |
74 | #include "cfglayout.h" | |
75 | #include "cfgloop.h" | |
76 | #include "hosthooks.h" | |
77 | #include "cgraph.h" | |
78 | #include "opts.h" | |
79 | #include "coverage.h" | |
80 | #include "value-prof.h" | |
77fce4cd | 81 | #include "tree-inline.h" |
82 | #include "tree-flow.h" | |
5290ebdb | 83 | #include "tree-pass.h" |
0f9005dd | 84 | #include "tree-dump.h" |
a49a878f | 85 | |
86 | #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO) | |
87 | #include "dwarf2out.h" | |
88 | #endif | |
89 | ||
da2f1613 | 90 | #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO) |
a49a878f | 91 | #include "dbxout.h" |
92 | #endif | |
93 | ||
94 | #ifdef SDB_DEBUGGING_INFO | |
95 | #include "sdbout.h" | |
96 | #endif | |
97 | ||
98 | #ifdef XCOFF_DEBUGGING_INFO | |
99 | #include "xcoffout.h" /* Needed for external data | |
100 | declarations for e.g. AIX 4.x. */ | |
101 | #endif | |
102 | ||
77fce4cd | 103 | /* Global variables used to communicate with passes. */ |
104 | int dump_flags; | |
105 | bool in_gimple_form; | |
a49a878f | 106 | |
a49a878f | 107 | |
108 | /* This is called from various places for FUNCTION_DECL, VAR_DECL, | |
109 | and TYPE_DECL nodes. | |
110 | ||
111 | This does nothing for local (non-static) variables, unless the | |
b2c4af5e | 112 | variable is a register variable with DECL_ASSEMBLER_NAME set. In |
113 | that case, or if the variable is not an automatic, it sets up the | |
114 | RTL and outputs any assembler code (label definition, storage | |
115 | allocation and initialization). | |
a49a878f | 116 | |
b2c4af5e | 117 | DECL is the declaration. TOP_LEVEL is nonzero |
a49a878f | 118 | if this declaration is not within a function. */ |
119 | ||
120 | void | |
121 | rest_of_decl_compilation (tree decl, | |
a49a878f | 122 | int top_level, |
123 | int at_end) | |
124 | { | |
125 | /* We deferred calling assemble_alias so that we could collect | |
126 | other attributes such as visibility. Emit the alias now. */ | |
127 | { | |
128 | tree alias; | |
129 | alias = lookup_attribute ("alias", DECL_ATTRIBUTES (decl)); | |
130 | if (alias) | |
131 | { | |
132 | alias = TREE_VALUE (TREE_VALUE (alias)); | |
133 | alias = get_identifier (TREE_STRING_POINTER (alias)); | |
134 | assemble_alias (decl, alias); | |
135 | } | |
136 | } | |
137 | ||
b2c4af5e | 138 | /* Can't defer this, because it needs to happen before any |
139 | later function definitions are processed. */ | |
5ded8c6f | 140 | if (DECL_ASSEMBLER_NAME_SET_P (decl) && DECL_REGISTER (decl)) |
b2c4af5e | 141 | make_decl_rtl (decl); |
142 | ||
a49a878f | 143 | /* Forward declarations for nested functions are not "external", |
144 | but we need to treat them as if they were. */ | |
145 | if (TREE_STATIC (decl) || DECL_EXTERNAL (decl) | |
146 | || TREE_CODE (decl) == FUNCTION_DECL) | |
147 | { | |
148 | timevar_push (TV_VARCONST); | |
149 | ||
a49a878f | 150 | /* Don't output anything when a tentative file-scope definition |
151 | is seen. But at end of compilation, do output code for them. | |
152 | ||
153 | We do output all variables when unit-at-a-time is active and rely on | |
154 | callgraph code to defer them except for forward declarations | |
155 | (see gcc.c-torture/compile/920624-1.c) */ | |
156 | if ((at_end | |
157 | || !DECL_DEFER_OUTPUT (decl) | |
c1dcd13c | 158 | || DECL_INITIAL (decl)) |
a49a878f | 159 | && !DECL_EXTERNAL (decl)) |
160 | { | |
c131e678 | 161 | if (TREE_CODE (decl) != FUNCTION_DECL) |
a49a878f | 162 | cgraph_varpool_finalize_decl (decl); |
163 | else | |
164 | assemble_variable (decl, top_level, at_end, 0); | |
165 | } | |
166 | ||
167 | #ifdef ASM_FINISH_DECLARE_OBJECT | |
168 | if (decl == last_assemble_variable_decl) | |
169 | { | |
170 | ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl, | |
171 | top_level, at_end); | |
172 | } | |
173 | #endif | |
174 | ||
175 | timevar_pop (TV_VARCONST); | |
176 | } | |
76512af6 | 177 | else if (TREE_CODE (decl) == TYPE_DECL |
178 | /* Like in rest_of_type_compilation, avoid confusing the debug | |
179 | information machinery when there are errors. */ | |
180 | && !(sorrycount || errorcount)) | |
a49a878f | 181 | { |
182 | timevar_push (TV_SYMOUT); | |
183 | debug_hooks->type_decl (decl, !top_level); | |
184 | timevar_pop (TV_SYMOUT); | |
185 | } | |
d7401838 | 186 | |
06b27565 | 187 | /* Let cgraph know about the existence of variables. */ |
d7401838 | 188 | if (TREE_CODE (decl) == VAR_DECL && !DECL_EXTERNAL (decl)) |
189 | cgraph_varpool_node (decl); | |
a49a878f | 190 | } |
191 | ||
192 | /* Called after finishing a record, union or enumeral type. */ | |
193 | ||
194 | void | |
195 | rest_of_type_compilation (tree type, int toplev) | |
196 | { | |
197 | /* Avoid confusing the debug information machinery when there are | |
198 | errors. */ | |
199 | if (errorcount != 0 || sorrycount != 0) | |
200 | return; | |
201 | ||
202 | timevar_push (TV_SYMOUT); | |
203 | debug_hooks->type_decl (TYPE_STUB_DECL (type), !toplev); | |
204 | timevar_pop (TV_SYMOUT); | |
205 | } | |
206 | ||
77fce4cd | 207 | \f |
a49a878f | 208 | |
77fce4cd | 209 | void |
210 | finish_optimization_passes (void) | |
a49a878f | 211 | { |
77fce4cd | 212 | enum tree_dump_index i; |
213 | struct dump_file_info *dfi; | |
214 | char *name; | |
a49a878f | 215 | |
77fce4cd | 216 | timevar_push (TV_DUMP); |
217 | if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities) | |
a49a878f | 218 | { |
77fce4cd | 219 | dump_file = dump_begin (pass_branch_prob.static_pass_number, NULL); |
220 | end_branch_prob (); | |
221 | if (dump_file) | |
222 | dump_end (pass_branch_prob.static_pass_number, dump_file); | |
a49a878f | 223 | } |
a49a878f | 224 | |
77fce4cd | 225 | if (optimize > 0) |
a49a878f | 226 | { |
77fce4cd | 227 | dump_file = dump_begin (pass_combine.static_pass_number, NULL); |
228 | if (dump_file) | |
a49a878f | 229 | { |
77fce4cd | 230 | dump_combine_total_stats (dump_file); |
231 | dump_end (pass_combine.static_pass_number, dump_file); | |
a49a878f | 232 | } |
233 | } | |
234 | ||
77fce4cd | 235 | /* Do whatever is necessary to finish printing the graphs. */ |
236 | if (graph_dump_format != no_graph) | |
237 | for (i = TDI_end; (dfi = get_dump_file_info (i)) != NULL; ++i) | |
238 | if (dump_initialized_p (i) | |
5f0ef107 | 239 | && (dfi->flags & TDF_GRAPH) != 0 |
77fce4cd | 240 | && (name = get_dump_file_name (i)) != NULL) |
5f0ef107 | 241 | { |
242 | finish_graph_dump_file (name); | |
243 | free (name); | |
244 | } | |
a49a878f | 245 | |
77fce4cd | 246 | timevar_pop (TV_DUMP); |
a49a878f | 247 | } |
a49a878f | 248 | |
77fce4cd | 249 | static bool |
250 | gate_rest_of_compilation (void) | |
a49a878f | 251 | { |
77fce4cd | 252 | /* Early return if there were errors. We can run afoul of our |
253 | consistency checks, and there's not really much point in fixing them. */ | |
254 | return !(rtl_dump_and_exit || flag_syntax_only || errorcount || sorrycount); | |
a49a878f | 255 | } |
256 | ||
77fce4cd | 257 | struct tree_opt_pass pass_rest_of_compilation = |
a49a878f | 258 | { |
77fce4cd | 259 | NULL, /* name */ |
260 | gate_rest_of_compilation, /* gate */ | |
261 | NULL, /* execute */ | |
262 | NULL, /* sub */ | |
263 | NULL, /* next */ | |
264 | 0, /* static_pass_number */ | |
265 | TV_REST_OF_COMPILATION, /* tv_id */ | |
266 | PROP_rtl, /* properties_required */ | |
267 | 0, /* properties_provided */ | |
268 | 0, /* properties_destroyed */ | |
269 | 0, /* todo_flags_start */ | |
270 | TODO_ggc_collect, /* todo_flags_finish */ | |
271 | 0 /* letter */ | |
272 | }; | |
a49a878f | 273 | |
77fce4cd | 274 | static bool |
275 | gate_postreload (void) | |
276 | { | |
277 | return reload_completed; | |
a49a878f | 278 | } |
279 | ||
77fce4cd | 280 | struct tree_opt_pass pass_postreload = |
a49a878f | 281 | { |
77fce4cd | 282 | NULL, /* name */ |
283 | gate_postreload, /* gate */ | |
284 | NULL, /* execute */ | |
285 | NULL, /* sub */ | |
286 | NULL, /* next */ | |
287 | 0, /* static_pass_number */ | |
288 | 0, /* tv_id */ | |
289 | PROP_rtl, /* properties_required */ | |
290 | 0, /* properties_provided */ | |
291 | 0, /* properties_destroyed */ | |
292 | 0, /* todo_flags_start */ | |
293 | TODO_ggc_collect, /* todo_flags_finish */ | |
294 | 0 /* letter */ | |
295 | }; | |
a49a878f | 296 | |
da2f1613 | 297 | |
a49a878f | 298 | |
77fce4cd | 299 | /* The root of the compilation pass tree, once constructed. */ |
300 | struct tree_opt_pass *all_passes, *all_ipa_passes, *all_lowering_passes; | |
a49a878f | 301 | |
77fce4cd | 302 | /* Iterate over the pass tree allocating dump file numbers. We want |
303 | to do this depth first, and independent of whether the pass is | |
304 | enabled or not. */ | |
a49a878f | 305 | |
77fce4cd | 306 | static void |
307 | register_one_dump_file (struct tree_opt_pass *pass, bool ipa, int n) | |
308 | { | |
309 | char *dot_name, *flag_name, *glob_name; | |
310 | char num[10]; | |
a49a878f | 311 | |
77fce4cd | 312 | /* See below in next_pass_1. */ |
313 | num[0] = '\0'; | |
314 | if (pass->static_pass_number != -1) | |
315 | sprintf (num, "%d", ((int) pass->static_pass_number < 0 | |
316 | ? 1 : pass->static_pass_number)); | |
a49a878f | 317 | |
77fce4cd | 318 | dot_name = concat (".", pass->name, num, NULL); |
319 | if (ipa) | |
a49a878f | 320 | { |
77fce4cd | 321 | flag_name = concat ("ipa-", pass->name, num, NULL); |
322 | glob_name = concat ("ipa-", pass->name, NULL); | |
323 | /* First IPA dump is cgraph that is dumped via separate channels. */ | |
324 | pass->static_pass_number = dump_register (dot_name, flag_name, glob_name, | |
325 | TDF_IPA, n + 1, 0); | |
a49a878f | 326 | } |
77fce4cd | 327 | else if (pass->properties_provided & PROP_trees) |
a49a878f | 328 | { |
77fce4cd | 329 | flag_name = concat ("tree-", pass->name, num, NULL); |
330 | glob_name = concat ("tree-", pass->name, NULL); | |
331 | pass->static_pass_number = dump_register (dot_name, flag_name, glob_name, | |
332 | TDF_TREE, n + TDI_tree_all, 0); | |
a49a878f | 333 | } |
a49a878f | 334 | else |
335 | { | |
77fce4cd | 336 | flag_name = concat ("rtl-", pass->name, num, NULL); |
337 | glob_name = concat ("rtl-", pass->name, NULL); | |
338 | pass->static_pass_number = dump_register (dot_name, flag_name, glob_name, | |
339 | TDF_RTL, n, pass->letter); | |
a49a878f | 340 | } |
da2f1613 | 341 | } |
342 | ||
77fce4cd | 343 | static int |
344 | register_dump_files (struct tree_opt_pass *pass, bool ipa, int properties) | |
da2f1613 | 345 | { |
77fce4cd | 346 | static int n = 0; |
347 | do | |
348 | { | |
349 | int new_properties; | |
350 | int pass_number; | |
a49a878f | 351 | |
77fce4cd | 352 | pass->properties_required = properties; |
353 | new_properties = | |
354 | (properties | pass->properties_provided) & ~pass->properties_destroyed; | |
a49a878f | 355 | |
77fce4cd | 356 | /* Reset the counter when we reach RTL-based passes. */ |
357 | if ((new_properties ^ pass->properties_required) & PROP_rtl) | |
358 | n = 0; | |
a49a878f | 359 | |
77fce4cd | 360 | pass_number = n; |
361 | if (pass->name) | |
362 | n++; | |
a49a878f | 363 | |
77fce4cd | 364 | if (pass->sub) |
365 | new_properties = register_dump_files (pass->sub, false, new_properties); | |
a49a878f | 366 | |
77fce4cd | 367 | /* If we have a gate, combine the properties that we could have with |
368 | and without the pass being examined. */ | |
369 | if (pass->gate) | |
370 | properties &= new_properties; | |
371 | else | |
372 | properties = new_properties; | |
a49a878f | 373 | |
77fce4cd | 374 | pass->properties_provided = properties; |
375 | if (pass->name) | |
376 | register_one_dump_file (pass, ipa, pass_number); | |
a49a878f | 377 | |
77fce4cd | 378 | pass = pass->next; |
a49a878f | 379 | } |
77fce4cd | 380 | while (pass); |
a49a878f | 381 | |
77fce4cd | 382 | return properties; |
a49a878f | 383 | } |
839f8415 | 384 | |
77fce4cd | 385 | /* Add a pass to the pass list. Duplicate the pass if it's already |
386 | in the list. */ | |
839f8415 | 387 | |
77fce4cd | 388 | static struct tree_opt_pass ** |
389 | next_pass_1 (struct tree_opt_pass **list, struct tree_opt_pass *pass) | |
a49a878f | 390 | { |
a49a878f | 391 | |
77fce4cd | 392 | /* A nonzero static_pass_number indicates that the |
393 | pass is already in the list. */ | |
394 | if (pass->static_pass_number) | |
395 | { | |
396 | struct tree_opt_pass *new; | |
a49a878f | 397 | |
77fce4cd | 398 | new = xmalloc (sizeof (*new)); |
399 | memcpy (new, pass, sizeof (*new)); | |
a49a878f | 400 | |
77fce4cd | 401 | /* Indicate to register_dump_files that this pass has duplicates, |
402 | and so it should rename the dump file. The first instance will | |
403 | be -1, and be number of duplicates = -static_pass_number - 1. | |
404 | Subsequent instances will be > 0 and just the duplicate number. */ | |
405 | if (pass->name) | |
406 | { | |
407 | pass->static_pass_number -= 1; | |
408 | new->static_pass_number = -pass->static_pass_number; | |
409 | } | |
410 | ||
411 | *list = new; | |
412 | } | |
413 | else | |
414 | { | |
415 | pass->static_pass_number = -1; | |
416 | *list = pass; | |
417 | } | |
418 | ||
419 | return &(*list)->next; | |
420 | ||
a49a878f | 421 | } |
422 | ||
ae6ad54a | 423 | /* Construct the pass tree. The sequencing of passes is driven by |
424 | the cgraph routines: | |
425 | ||
426 | cgraph_finalize_compilation_unit () | |
427 | for each node N in the cgraph | |
428 | cgraph_analyze_function (N) | |
429 | cgraph_lower_function (N) -> all_lowering_passes | |
430 | ||
431 | If we are optimizing, cgraph_optimize is then invoked: | |
432 | ||
433 | cgraph_optimize () | |
434 | ipa_passes () -> all_ipa_passes | |
435 | cgraph_expand_all_functions () | |
436 | for each node N in the cgraph | |
437 | cgraph_expand_function (N) | |
438 | cgraph_lower_function (N) -> Now a NOP. | |
439 | lang_hooks.callgraph.expand_function (DECL (N)) | |
440 | tree_rest_of_compilation (DECL (N)) -> all_passes | |
441 | */ | |
da2f1613 | 442 | |
77fce4cd | 443 | void |
444 | init_optimization_passes (void) | |
445 | { | |
446 | struct tree_opt_pass **p; | |
447 | ||
448 | #define NEXT_PASS(PASS) (p = next_pass_1 (p, &PASS)) | |
449 | /* Interprocedural optimization passes. */ | |
450 | p = &all_ipa_passes; | |
451 | NEXT_PASS (pass_early_ipa_inline); | |
452 | NEXT_PASS (pass_early_local_passes); | |
b5d36404 | 453 | NEXT_PASS (pass_ipa_cp); |
77fce4cd | 454 | NEXT_PASS (pass_ipa_inline); |
f7d118a9 | 455 | NEXT_PASS (pass_ipa_reference); |
456 | NEXT_PASS (pass_ipa_pure_const); | |
457 | NEXT_PASS (pass_ipa_type_escape); | |
77fce4cd | 458 | *p = NULL; |
459 | ||
ae6ad54a | 460 | /* All passes needed to lower the function into shape optimizers can |
461 | operate on. */ | |
77fce4cd | 462 | p = &all_lowering_passes; |
463 | NEXT_PASS (pass_remove_useless_stmts); | |
464 | NEXT_PASS (pass_mudflap_1); | |
1e8e9920 | 465 | NEXT_PASS (pass_lower_omp); |
77fce4cd | 466 | NEXT_PASS (pass_lower_cf); |
467 | NEXT_PASS (pass_lower_eh); | |
468 | NEXT_PASS (pass_build_cfg); | |
469 | NEXT_PASS (pass_lower_complex_O0); | |
470 | NEXT_PASS (pass_lower_vector); | |
471 | NEXT_PASS (pass_warn_function_return); | |
472 | NEXT_PASS (pass_early_tree_profile); | |
473 | *p = NULL; | |
474 | ||
475 | p = &pass_early_local_passes.sub; | |
476 | NEXT_PASS (pass_tree_profile); | |
477 | NEXT_PASS (pass_cleanup_cfg); | |
478 | NEXT_PASS (pass_rebuild_cgraph_edges); | |
479 | *p = NULL; | |
480 | ||
481 | p = &all_passes; | |
482 | NEXT_PASS (pass_fixup_cfg); | |
483 | NEXT_PASS (pass_init_datastructures); | |
773c5ba7 | 484 | NEXT_PASS (pass_expand_omp); |
77fce4cd | 485 | NEXT_PASS (pass_all_optimizations); |
486 | NEXT_PASS (pass_warn_function_noreturn); | |
487 | NEXT_PASS (pass_mudflap_2); | |
488 | NEXT_PASS (pass_free_datastructures); | |
489 | NEXT_PASS (pass_free_cfg_annotations); | |
490 | NEXT_PASS (pass_expand); | |
491 | NEXT_PASS (pass_rest_of_compilation); | |
492 | NEXT_PASS (pass_clean_state); | |
493 | *p = NULL; | |
494 | ||
495 | p = &pass_all_optimizations.sub; | |
496 | NEXT_PASS (pass_referenced_vars); | |
497 | NEXT_PASS (pass_create_structure_vars); | |
498 | NEXT_PASS (pass_build_ssa); | |
77fce4cd | 499 | NEXT_PASS (pass_may_alias); |
500 | NEXT_PASS (pass_return_slot); | |
77fce4cd | 501 | NEXT_PASS (pass_rename_ssa_copies); |
502 | NEXT_PASS (pass_early_warn_uninitialized); | |
503 | ||
504 | /* Initial scalar cleanups. */ | |
505 | NEXT_PASS (pass_ccp); | |
506 | NEXT_PASS (pass_fre); | |
507 | NEXT_PASS (pass_dce); | |
508 | NEXT_PASS (pass_forwprop); | |
509 | NEXT_PASS (pass_copy_prop); | |
510 | NEXT_PASS (pass_vrp); | |
511 | NEXT_PASS (pass_dce); | |
512 | NEXT_PASS (pass_merge_phi); | |
513 | NEXT_PASS (pass_dominator); | |
514 | ||
421828b0 | 515 | /* The only copy propagation opportunities left after DOM |
516 | should be due to degenerate PHI nodes. So rather than | |
517 | run the full copy propagator, just discover and copy | |
518 | propagate away the degenerate PHI nodes. */ | |
519 | NEXT_PASS (pass_phi_only_copy_prop); | |
520 | ||
77fce4cd | 521 | NEXT_PASS (pass_phiopt); |
77fce4cd | 522 | NEXT_PASS (pass_may_alias); |
77fce4cd | 523 | NEXT_PASS (pass_tail_recursion); |
524 | NEXT_PASS (pass_profile); | |
525 | NEXT_PASS (pass_ch); | |
526 | NEXT_PASS (pass_stdarg); | |
527 | NEXT_PASS (pass_lower_complex); | |
528 | NEXT_PASS (pass_sra); | |
529 | /* FIXME: SRA may generate arbitrary gimple code, exposing new | |
530 | aliased and call-clobbered variables. As mentioned below, | |
531 | pass_may_alias should be a TODO item. */ | |
532 | NEXT_PASS (pass_may_alias); | |
533 | NEXT_PASS (pass_rename_ssa_copies); | |
534 | NEXT_PASS (pass_dominator); | |
421828b0 | 535 | |
536 | /* The only copy propagation opportunities left after DOM | |
537 | should be due to degenerate PHI nodes. So rather than | |
538 | run the full copy propagator, just discover and copy | |
539 | propagate away the degenerate PHI nodes. */ | |
540 | NEXT_PASS (pass_phi_only_copy_prop); | |
541 | ||
54aceb26 | 542 | NEXT_PASS (pass_reassoc); |
77fce4cd | 543 | NEXT_PASS (pass_dce); |
544 | NEXT_PASS (pass_dse); | |
545 | NEXT_PASS (pass_may_alias); | |
546 | NEXT_PASS (pass_forwprop); | |
547 | NEXT_PASS (pass_phiopt); | |
548 | NEXT_PASS (pass_object_sizes); | |
549 | NEXT_PASS (pass_store_ccp); | |
550 | NEXT_PASS (pass_store_copy_prop); | |
551 | NEXT_PASS (pass_fold_builtins); | |
552 | /* FIXME: May alias should a TODO but for 4.0.0, | |
553 | we add may_alias right after fold builtins | |
554 | which can create arbitrary GIMPLE. */ | |
555 | NEXT_PASS (pass_may_alias); | |
77fce4cd | 556 | NEXT_PASS (pass_split_crit_edges); |
77fce4cd | 557 | NEXT_PASS (pass_pre); |
25928e34 | 558 | NEXT_PASS (pass_may_alias); |
77fce4cd | 559 | NEXT_PASS (pass_sink_code); |
0526a3ff | 560 | NEXT_PASS (pass_tree_loop); |
ac70caad | 561 | NEXT_PASS (pass_cse_reciprocals); |
54aceb26 | 562 | NEXT_PASS (pass_reassoc); |
77fce4cd | 563 | NEXT_PASS (pass_dominator); |
421828b0 | 564 | |
565 | /* The only copy propagation opportunities left after DOM | |
566 | should be due to degenerate PHI nodes. So rather than | |
567 | run the full copy propagator, just discover and copy | |
568 | propagate away the degenerate PHI nodes. */ | |
569 | NEXT_PASS (pass_phi_only_copy_prop); | |
570 | ||
77fce4cd | 571 | NEXT_PASS (pass_cd_dce); |
572 | ||
573 | /* FIXME: If DCE is not run before checking for uninitialized uses, | |
574 | we may get false warnings (e.g., testsuite/gcc.dg/uninit-5.c). | |
575 | However, this also causes us to misdiagnose cases that should be | |
576 | real warnings (e.g., testsuite/gcc.dg/pr18501.c). | |
577 | ||
578 | To fix the false positives in uninit-5.c, we would have to | |
579 | account for the predicates protecting the set and the use of each | |
580 | variable. Using a representation like Gated Single Assignment | |
581 | may help. */ | |
582 | NEXT_PASS (pass_late_warn_uninitialized); | |
583 | NEXT_PASS (pass_dse); | |
584 | NEXT_PASS (pass_forwprop); | |
585 | NEXT_PASS (pass_phiopt); | |
586 | NEXT_PASS (pass_tail_calls); | |
587 | NEXT_PASS (pass_rename_ssa_copies); | |
588 | NEXT_PASS (pass_uncprop); | |
589 | NEXT_PASS (pass_del_ssa); | |
590 | NEXT_PASS (pass_nrv); | |
77fce4cd | 591 | NEXT_PASS (pass_mark_used_blocks); |
592 | NEXT_PASS (pass_cleanup_cfg_post_optimizing); | |
593 | *p = NULL; | |
594 | ||
0526a3ff | 595 | p = &pass_tree_loop.sub; |
596 | NEXT_PASS (pass_tree_loop_init); | |
77fce4cd | 597 | NEXT_PASS (pass_copy_prop); |
598 | NEXT_PASS (pass_lim); | |
0526a3ff | 599 | NEXT_PASS (pass_tree_unswitch); |
77fce4cd | 600 | NEXT_PASS (pass_scev_cprop); |
8feba661 | 601 | NEXT_PASS (pass_empty_loop); |
77fce4cd | 602 | NEXT_PASS (pass_record_bounds); |
603 | NEXT_PASS (pass_linear_transform); | |
604 | NEXT_PASS (pass_iv_canon); | |
605 | NEXT_PASS (pass_if_conversion); | |
606 | NEXT_PASS (pass_vectorize); | |
607 | /* NEXT_PASS (pass_may_alias) cannot be done again because the | |
608 | vectorizer creates alias relations that are not supported by | |
609 | pass_may_alias. */ | |
77fce4cd | 610 | NEXT_PASS (pass_complete_unroll); |
611 | NEXT_PASS (pass_iv_optimize); | |
0526a3ff | 612 | NEXT_PASS (pass_tree_loop_done); |
77fce4cd | 613 | *p = NULL; |
614 | ||
823e5999 | 615 | p = &pass_vectorize.sub; |
922f49a3 | 616 | NEXT_PASS (pass_lower_vector_ssa); |
78eb8231 | 617 | NEXT_PASS (pass_dce_loop); |
823e5999 | 618 | *p = NULL; |
619 | ||
0526a3ff | 620 | p = &pass_loop2.sub; |
621 | NEXT_PASS (pass_rtl_loop_init); | |
622 | NEXT_PASS (pass_rtl_move_loop_invariants); | |
623 | NEXT_PASS (pass_rtl_unswitch); | |
624 | NEXT_PASS (pass_rtl_unroll_and_peel_loops); | |
625 | NEXT_PASS (pass_rtl_doloop); | |
626 | NEXT_PASS (pass_rtl_loop_done); | |
627 | *p = NULL; | |
628 | ||
77fce4cd | 629 | p = &pass_rest_of_compilation.sub; |
630 | NEXT_PASS (pass_remove_unnecessary_notes); | |
631 | NEXT_PASS (pass_init_function); | |
632 | NEXT_PASS (pass_jump); | |
633 | NEXT_PASS (pass_insn_locators_initialize); | |
634 | NEXT_PASS (pass_rtl_eh); | |
635 | NEXT_PASS (pass_initial_value_sets); | |
636 | NEXT_PASS (pass_unshare_all_rtl); | |
637 | NEXT_PASS (pass_instantiate_virtual_regs); | |
638 | NEXT_PASS (pass_jump2); | |
639 | NEXT_PASS (pass_cse); | |
640 | NEXT_PASS (pass_gcse); | |
641 | NEXT_PASS (pass_loop_optimize); | |
642 | NEXT_PASS (pass_jump_bypass); | |
643 | NEXT_PASS (pass_cfg); | |
ed4294da | 644 | NEXT_PASS (pass_branch_prob); |
77fce4cd | 645 | NEXT_PASS (pass_rtl_ifcvt); |
646 | NEXT_PASS (pass_tracer); | |
0526a3ff | 647 | /* Perform loop optimizations. It might be better to do them a bit |
648 | sooner, but we want the profile feedback to work more | |
649 | efficiently. */ | |
77fce4cd | 650 | NEXT_PASS (pass_loop2); |
651 | NEXT_PASS (pass_web); | |
652 | NEXT_PASS (pass_cse2); | |
653 | NEXT_PASS (pass_life); | |
654 | NEXT_PASS (pass_combine); | |
655 | NEXT_PASS (pass_if_after_combine); | |
656 | NEXT_PASS (pass_partition_blocks); | |
657 | NEXT_PASS (pass_regmove); | |
658 | NEXT_PASS (pass_split_all_insns); | |
659 | NEXT_PASS (pass_mode_switching); | |
660 | NEXT_PASS (pass_recompute_reg_usage); | |
661 | NEXT_PASS (pass_sms); | |
662 | NEXT_PASS (pass_sched); | |
663 | NEXT_PASS (pass_local_alloc); | |
664 | NEXT_PASS (pass_global_alloc); | |
665 | NEXT_PASS (pass_postreload); | |
666 | *p = NULL; | |
667 | ||
77fce4cd | 668 | p = &pass_postreload.sub; |
669 | NEXT_PASS (pass_postreload_cse); | |
670 | NEXT_PASS (pass_gcse2); | |
671 | NEXT_PASS (pass_flow2); | |
89140b26 | 672 | NEXT_PASS (pass_rtl_seqabstr); |
77fce4cd | 673 | NEXT_PASS (pass_stack_adjustments); |
674 | NEXT_PASS (pass_peephole2); | |
675 | NEXT_PASS (pass_if_after_reload); | |
676 | NEXT_PASS (pass_regrename); | |
677 | NEXT_PASS (pass_reorder_blocks); | |
678 | NEXT_PASS (pass_branch_target_load_optimize); | |
679 | NEXT_PASS (pass_leaf_regs); | |
680 | NEXT_PASS (pass_sched2); | |
681 | NEXT_PASS (pass_split_before_regstack); | |
682 | NEXT_PASS (pass_stack_regs); | |
683 | NEXT_PASS (pass_compute_alignments); | |
684 | NEXT_PASS (pass_duplicate_computed_gotos); | |
685 | NEXT_PASS (pass_variable_tracking); | |
686 | NEXT_PASS (pass_free_cfg); | |
687 | NEXT_PASS (pass_machine_reorg); | |
688 | NEXT_PASS (pass_purge_lineno_notes); | |
689 | NEXT_PASS (pass_cleanup_barriers); | |
690 | NEXT_PASS (pass_delay_slots); | |
691 | NEXT_PASS (pass_split_for_shorten_branches); | |
692 | NEXT_PASS (pass_convert_to_eh_region_ranges); | |
693 | NEXT_PASS (pass_shorten_branches); | |
694 | NEXT_PASS (pass_set_nothrow_function_flags); | |
695 | NEXT_PASS (pass_final); | |
696 | *p = NULL; | |
697 | ||
698 | #undef NEXT_PASS | |
699 | ||
700 | /* Register the passes with the tree dump code. */ | |
c24b15e4 | 701 | register_dump_files (all_ipa_passes, true, PROP_gimple_leh | PROP_cfg); |
77fce4cd | 702 | register_dump_files (all_lowering_passes, false, PROP_gimple_any); |
c24b15e4 | 703 | register_dump_files (all_passes, false, PROP_gimple_leh | PROP_cfg); |
77fce4cd | 704 | } |
705 | ||
706 | static unsigned int last_verified; | |
77fce4cd | 707 | static void |
708 | execute_todo (struct tree_opt_pass *pass, unsigned int flags, bool use_required) | |
709 | { | |
710 | int properties | |
711 | = use_required ? pass->properties_required : pass->properties_provided; | |
712 | ||
713 | #if defined ENABLE_CHECKING | |
714 | if (need_ssa_update_p ()) | |
715 | gcc_assert (flags & TODO_update_ssa_any); | |
716 | #endif | |
717 | ||
91be5bb8 | 718 | /* Always cleanup the CFG before doing anything else. */ |
77fce4cd | 719 | if (flags & TODO_cleanup_cfg) |
720 | { | |
721 | if (current_loops) | |
722 | cleanup_tree_cfg_loop (); | |
723 | else | |
724 | cleanup_tree_cfg (); | |
ae79515f | 725 | |
726 | /* When cleanup_tree_cfg merges consecutive blocks, it may | |
727 | perform some simplistic propagation when removing single | |
728 | valued PHI nodes. This propagation may, in turn, cause the | |
729 | SSA form to become out-of-date (see PR 22037). So, even | |
730 | if the parent pass had not scheduled an SSA update, we may | |
731 | still need to do one. */ | |
732 | if (!(flags & TODO_update_ssa_any) && need_ssa_update_p ()) | |
733 | flags |= TODO_update_ssa; | |
77fce4cd | 734 | } |
a49a878f | 735 | |
91be5bb8 | 736 | if (flags & TODO_update_ssa_any) |
737 | { | |
738 | unsigned update_flags = flags & TODO_update_ssa_any; | |
739 | update_ssa (update_flags); | |
740 | } | |
741 | ||
db22d3cc | 742 | if (flags & TODO_remove_unused_locals) |
743 | remove_unused_locals (); | |
744 | ||
77fce4cd | 745 | if ((flags & TODO_dump_func) |
746 | && dump_file && current_function_decl) | |
747 | { | |
748 | if (properties & PROP_trees) | |
749 | dump_function_to_file (current_function_decl, | |
750 | dump_file, dump_flags); | |
751 | else if (properties & PROP_cfg) | |
5f0ef107 | 752 | { |
753 | print_rtl_with_bb (dump_file, get_insns ()); | |
754 | ||
755 | if (graph_dump_format != no_graph | |
756 | && (dump_flags & TDF_GRAPH)) | |
757 | print_rtl_graph_with_bb (dump_file_name, get_insns ()); | |
758 | } | |
77fce4cd | 759 | else |
760 | print_rtl (dump_file, get_insns ()); | |
761 | ||
762 | /* Flush the file. If verification fails, we won't be able to | |
763 | close the file before aborting. */ | |
764 | fflush (dump_file); | |
765 | } | |
766 | if ((flags & TODO_dump_cgraph) | |
767 | && dump_file && !current_function_decl) | |
768 | { | |
769 | dump_cgraph (dump_file); | |
770 | /* Flush the file. If verification fails, we won't be able to | |
771 | close the file before aborting. */ | |
772 | fflush (dump_file); | |
773 | } | |
a49a878f | 774 | |
77fce4cd | 775 | if (flags & TODO_ggc_collect) |
776 | { | |
777 | ggc_collect (); | |
778 | } | |
da2f1613 | 779 | |
77fce4cd | 780 | #if defined ENABLE_CHECKING |
781 | if ((pass->properties_required & PROP_ssa) | |
782 | && !(pass->properties_destroyed & PROP_ssa)) | |
783 | verify_ssa (true); | |
784 | if (flags & TODO_verify_flow) | |
785 | verify_flow_info (); | |
786 | if (flags & TODO_verify_stmts) | |
787 | verify_stmts (); | |
788 | if (flags & TODO_verify_loops) | |
789 | verify_loop_closed_ssa (); | |
790 | #endif | |
a49a878f | 791 | } |
792 | ||
77fce4cd | 793 | static bool |
794 | execute_one_pass (struct tree_opt_pass *pass) | |
a49a878f | 795 | { |
77fce4cd | 796 | unsigned int todo; |
da2f1613 | 797 | |
77fce4cd | 798 | /* See if we're supposed to run this pass. */ |
799 | if (pass->gate && !pass->gate ()) | |
800 | return false; | |
a49a878f | 801 | |
77fce4cd | 802 | /* Note that the folders should only create gimple expressions. |
803 | This is a hack until the new folder is ready. */ | |
804 | in_gimple_form = (pass->properties_provided & PROP_trees) != 0; | |
a49a878f | 805 | |
77fce4cd | 806 | /* Run pre-pass verification. */ |
807 | todo = pass->todo_flags_start & ~last_verified; | |
808 | if (todo) | |
809 | execute_todo (pass, todo, true); | |
a49a878f | 810 | |
77fce4cd | 811 | /* If a dump file name is present, open it if enabled. */ |
812 | if (pass->static_pass_number != -1) | |
813 | { | |
814 | bool initializing_dump = !dump_initialized_p (pass->static_pass_number); | |
815 | dump_file_name = get_dump_file_name (pass->static_pass_number); | |
816 | dump_file = dump_begin (pass->static_pass_number, &dump_flags); | |
817 | if (dump_file && current_function_decl) | |
818 | { | |
819 | const char *dname, *aname; | |
820 | dname = lang_hooks.decl_printable_name (current_function_decl, 2); | |
821 | aname = (IDENTIFIER_POINTER | |
822 | (DECL_ASSEMBLER_NAME (current_function_decl))); | |
823 | fprintf (dump_file, "\n;; Function %s (%s)%s\n\n", dname, aname, | |
824 | cfun->function_frequency == FUNCTION_FREQUENCY_HOT | |
825 | ? " (hot)" | |
826 | : cfun->function_frequency == FUNCTION_FREQUENCY_UNLIKELY_EXECUTED | |
827 | ? " (unlikely executed)" | |
828 | : ""); | |
829 | } | |
a49a878f | 830 | |
77fce4cd | 831 | if (initializing_dump |
5f0ef107 | 832 | && dump_file |
833 | && graph_dump_format != no_graph | |
77fce4cd | 834 | && (pass->properties_provided & (PROP_cfg | PROP_rtl)) |
835 | == (PROP_cfg | PROP_rtl)) | |
5f0ef107 | 836 | { |
837 | get_dump_file_info (pass->static_pass_number)->flags |= TDF_GRAPH; | |
838 | dump_flags |= TDF_GRAPH; | |
839 | clean_graph_dump_file (dump_file_name); | |
840 | } | |
77fce4cd | 841 | } |
a49a878f | 842 | |
77fce4cd | 843 | /* If a timevar is present, start it. */ |
844 | if (pass->tv_id) | |
845 | timevar_push (pass->tv_id); | |
a49a878f | 846 | |
77fce4cd | 847 | /* Do it! */ |
848 | if (pass->execute) | |
849 | pass->execute (); | |
a49a878f | 850 | |
77fce4cd | 851 | /* Stop timevar. */ |
852 | if (pass->tv_id) | |
853 | timevar_pop (pass->tv_id); | |
a49a878f | 854 | |
77fce4cd | 855 | /* Run post-pass cleanup and verification. */ |
856 | todo = pass->todo_flags_finish; | |
857 | last_verified = todo & TODO_verify_all; | |
858 | if (todo) | |
859 | execute_todo (pass, todo, false); | |
a49a878f | 860 | |
77fce4cd | 861 | /* Flush and close dump file. */ |
862 | if (dump_file_name) | |
a49a878f | 863 | { |
77fce4cd | 864 | free ((char *) dump_file_name); |
865 | dump_file_name = NULL; | |
a49a878f | 866 | } |
77fce4cd | 867 | if (dump_file) |
a49a878f | 868 | { |
77fce4cd | 869 | dump_end (pass->static_pass_number, dump_file); |
870 | dump_file = NULL; | |
a49a878f | 871 | } |
872 | ||
77fce4cd | 873 | return true; |
a49a878f | 874 | } |
875 | ||
77fce4cd | 876 | void |
877 | execute_pass_list (struct tree_opt_pass *pass) | |
a49a878f | 878 | { |
77fce4cd | 879 | do |
a49a878f | 880 | { |
77fce4cd | 881 | if (execute_one_pass (pass) && pass->sub) |
882 | execute_pass_list (pass->sub); | |
883 | pass = pass->next; | |
a49a878f | 884 | } |
77fce4cd | 885 | while (pass); |
a49a878f | 886 | } |
887 | ||
77fce4cd | 888 | /* Same as execute_pass_list but assume that subpasses of IPA passes |
889 | are local passes. */ | |
890 | void | |
891 | execute_ipa_pass_list (struct tree_opt_pass *pass) | |
a49a878f | 892 | { |
77fce4cd | 893 | do |
a49a878f | 894 | { |
77fce4cd | 895 | if (execute_one_pass (pass) && pass->sub) |
a49a878f | 896 | { |
77fce4cd | 897 | struct cgraph_node *node; |
898 | for (node = cgraph_nodes; node; node = node->next) | |
899 | if (node->analyzed) | |
900 | { | |
901 | push_cfun (DECL_STRUCT_FUNCTION (node->decl)); | |
902 | current_function_decl = node->decl; | |
903 | execute_pass_list (pass->sub); | |
904 | free_dominance_info (CDI_DOMINATORS); | |
905 | free_dominance_info (CDI_POST_DOMINATORS); | |
906 | current_function_decl = NULL; | |
907 | pop_cfun (); | |
908 | ggc_collect (); | |
909 | } | |
a49a878f | 910 | } |
77fce4cd | 911 | pass = pass->next; |
a49a878f | 912 | } |
77fce4cd | 913 | while (pass); |
da2f1613 | 914 | } |