1 /* Description of pass structure
2 Copyright (C
) 1987-2015 Free Software Foundation
, Inc.
4 This file is part of GCC.
6 GCC is free software
; you can redistribute it and
/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation
; either version
3, or (at your option
) any later
11 GCC is distributed in the hope that it will be useful
, but WITHOUT ANY
12 WARRANTY
; without even the implied warranty of MERCHANTABILITY or
13 FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC
; see the file COPYING3. If not see
18 <http
://www.gnu.org
/licenses
/>.
*/
21 Macros that should be defined when using this file
:
22 INSERT_PASSES_AFTER (PASS
)
23 PUSH_INSERT_PASSES_WITHIN (PASS
)
26 TERMINATE_PASS_LIST ()
29 /* All passes needed to lower the function into shape optimizers can
30 operate on. These passes are always run first on the function
, but
31 backend might produce already lowered functions that are not processed
33 INSERT_PASSES_AFTER (all_lowering_passes
)
34 NEXT_PASS (pass_warn_unused_result
);
35 NEXT_PASS (pass_diagnose_omp_blocks
);
36 NEXT_PASS (pass_diagnose_tm_blocks
);
37 NEXT_PASS (pass_lower_omp
);
38 NEXT_PASS (pass_lower_cf
);
39 NEXT_PASS (pass_lower_tm
);
40 NEXT_PASS (pass_refactor_eh
);
41 NEXT_PASS (pass_lower_eh
);
42 NEXT_PASS (pass_build_cfg
);
43 NEXT_PASS (pass_warn_function_return
);
44 NEXT_PASS (pass_expand_omp
);
45 NEXT_PASS (pass_build_cgraph_edges
);
46 TERMINATE_PASS_LIST ()
48 /* Interprocedural optimization passes.
*/
49 INSERT_PASSES_AFTER (all_small_ipa_passes
)
50 NEXT_PASS (pass_ipa_free_lang_data
);
51 NEXT_PASS (pass_ipa_function_and_variable_visibility
);
52 NEXT_PASS (pass_ipa_chkp_versioning
);
53 NEXT_PASS (pass_ipa_chkp_early_produce_thunks
);
54 NEXT_PASS (pass_build_ssa_passes
);
55 PUSH_INSERT_PASSES_WITHIN (pass_build_ssa_passes
)
56 NEXT_PASS (pass_fixup_cfg
);
57 NEXT_PASS (pass_init_datastructures
);
58 NEXT_PASS (pass_build_ssa
);
59 NEXT_PASS (pass_ubsan
);
60 NEXT_PASS (pass_early_warn_uninitialized
);
61 NEXT_PASS (pass_nothrow
);
64 NEXT_PASS (pass_chkp_instrumentation_passes
);
65 PUSH_INSERT_PASSES_WITHIN (pass_chkp_instrumentation_passes
)
66 NEXT_PASS (pass_fixup_cfg
);
67 NEXT_PASS (pass_chkp
);
68 NEXT_PASS (pass_rebuild_cgraph_edges
);
71 NEXT_PASS (pass_local_optimization_passes
);
72 PUSH_INSERT_PASSES_WITHIN (pass_local_optimization_passes
)
73 NEXT_PASS (pass_fixup_cfg
);
74 NEXT_PASS (pass_rebuild_cgraph_edges
);
75 NEXT_PASS (pass_inline_parameters
);
76 NEXT_PASS (pass_early_inline
);
77 NEXT_PASS (pass_all_early_optimizations
);
78 PUSH_INSERT_PASSES_WITHIN (pass_all_early_optimizations
)
79 NEXT_PASS (pass_remove_cgraph_callee_edges
);
80 NEXT_PASS (pass_rename_ssa_copies
);
81 NEXT_PASS (pass_object_sizes
);
83 /* After CCP we rewrite no longer addressed locals into SSA
85 NEXT_PASS (pass_forwprop
);
86 NEXT_PASS (pass_sra_early
);
87 /* pass_build_ealias is a dummy pass that ensures that we
88 execute TODO_rebuild_alias at this point.
*/
89 NEXT_PASS (pass_build_ealias
);
91 NEXT_PASS (pass_merge_phi
);
93 NEXT_PASS (pass_cd_dce
);
94 NEXT_PASS (pass_early_ipa_sra
);
95 NEXT_PASS (pass_tail_recursion
);
96 NEXT_PASS (pass_convert_switch
);
97 NEXT_PASS (pass_cleanup_eh
);
98 NEXT_PASS (pass_profile
);
99 NEXT_PASS (pass_local_pure_const
);
100 /* Split functions creates parts that are not run through
101 early optimizations again. It is thus good idea to do this
103 NEXT_PASS (pass_split_functions
);
105 NEXT_PASS (pass_release_ssa_names
);
106 NEXT_PASS (pass_rebuild_cgraph_edges
);
107 NEXT_PASS (pass_inline_parameters
);
109 NEXT_PASS (pass_ipa_chkp_produce_thunks
);
110 NEXT_PASS (pass_ipa_auto_profile
);
111 NEXT_PASS (pass_ipa_free_inline_summary
);
112 NEXT_PASS (pass_ipa_tree_profile
);
113 PUSH_INSERT_PASSES_WITHIN (pass_ipa_tree_profile
)
114 NEXT_PASS (pass_feedback_split_functions
);
116 NEXT_PASS (pass_ipa_increase_alignment
);
117 NEXT_PASS (pass_ipa_tm
);
118 NEXT_PASS (pass_ipa_lower_emutls
);
119 TERMINATE_PASS_LIST ()
121 INSERT_PASSES_AFTER (all_regular_ipa_passes
)
122 NEXT_PASS (pass_ipa_whole_program_visibility
);
123 NEXT_PASS (pass_ipa_profile
);
124 NEXT_PASS (pass_ipa_icf
);
125 NEXT_PASS (pass_ipa_devirt
);
126 NEXT_PASS (pass_ipa_cp
);
127 NEXT_PASS (pass_ipa_cdtor_merge
);
128 NEXT_PASS (pass_ipa_inline
);
129 NEXT_PASS (pass_ipa_pure_const
);
130 NEXT_PASS (pass_ipa_reference
);
131 /* This pass needs to be scheduled after any IP code duplication.
*/
132 NEXT_PASS (pass_ipa_single_use
);
133 /* Comdat privatization come last
, as direct references to comdat local
134 symbols are not allowed outside of the comdat group. Privatizing early
135 would result in missed optimizations due to this restriction.
*/
136 NEXT_PASS (pass_ipa_comdats
);
137 TERMINATE_PASS_LIST ()
139 /* Simple IPA passes executed after the regular passes. In WHOPR mode the
140 passes are executed after partitioning and thus see just parts of the
142 INSERT_PASSES_AFTER (all_late_ipa_passes
)
143 NEXT_PASS (pass_ipa_pta
);
144 NEXT_PASS (pass_omp_simd_clone
);
145 TERMINATE_PASS_LIST ()
147 /* These passes are run after IPA passes on every function that is being
148 output to the assembler file.
*/
149 INSERT_PASSES_AFTER (all_passes
)
150 NEXT_PASS (pass_fixup_cfg
);
151 NEXT_PASS (pass_lower_eh_dispatch
);
152 NEXT_PASS (pass_all_optimizations
);
153 PUSH_INSERT_PASSES_WITHIN (pass_all_optimizations
)
154 NEXT_PASS (pass_remove_cgraph_callee_edges
);
155 /* Initial scalar cleanups before alias computation.
156 They ensure memory accesses are not indirect wherever possible.
*/
157 NEXT_PASS (pass_strip_predict_hints
);
158 NEXT_PASS (pass_rename_ssa_copies
);
159 NEXT_PASS (pass_ccp
);
160 /* After CCP we rewrite no longer addressed locals into SSA
162 NEXT_PASS (pass_complete_unrolli
);
163 NEXT_PASS (pass_phiprop
);
164 NEXT_PASS (pass_forwprop
);
165 NEXT_PASS (pass_object_sizes
);
166 /* pass_build_alias is a dummy pass that ensures that we
167 execute TODO_rebuild_alias at this point.
*/
168 NEXT_PASS (pass_build_alias
);
169 NEXT_PASS (pass_return_slot
);
170 NEXT_PASS (pass_fre
);
171 NEXT_PASS (pass_merge_phi
);
172 NEXT_PASS (pass_vrp
);
173 NEXT_PASS (pass_chkp_opt
);
174 NEXT_PASS (pass_dce
);
175 NEXT_PASS (pass_stdarg
);
176 NEXT_PASS (pass_call_cdce
);
177 NEXT_PASS (pass_cselim
);
178 NEXT_PASS (pass_copy_prop
);
179 NEXT_PASS (pass_tree_ifcombine
);
180 NEXT_PASS (pass_merge_phi
);
181 NEXT_PASS (pass_phiopt
);
182 NEXT_PASS (pass_tail_recursion
);
184 NEXT_PASS (pass_lower_complex
);
185 NEXT_PASS (pass_sra
);
186 NEXT_PASS (pass_rename_ssa_copies
);
187 /* The dom pass will also resolve all __builtin_constant_p calls
188 that are still there to
0. This has to be done after some
189 propagations have already run
, but before some more dead code
190 is removed
, and this place fits nicely. Remember this when
191 trying to move or duplicate pass_dominator somewhere earlier.
*/
192 NEXT_PASS (pass_dominator
);
193 /* At this point the majority of const
/copy propagations
194 are exposed. Go ahead and identify paths that should never
195 be executed in a conforming program and isolate those paths.
197 This will expose more degenerate PHIs in the main path and
198 expose more PRE
/DOM optimization opportunities.
*/
199 NEXT_PASS (pass_isolate_erroneous_paths
);
200 /* The only const
/copy propagation opportunities left after
201 DOM and erroneous path isolation should be due to degenerate PHI nodes.
202 So rather than run the full propagators
, run a specialized pass which
203 only examines PHIs to discover const
/copy propagation
205 NEXT_PASS (pass_phi_only_cprop
);
206 NEXT_PASS (pass_dse
);
207 NEXT_PASS (pass_reassoc
);
208 NEXT_PASS (pass_dce
);
209 NEXT_PASS (pass_forwprop
);
210 NEXT_PASS (pass_phiopt
);
211 NEXT_PASS (pass_ccp
);
212 /* After CCP we rewrite no longer addressed locals into SSA
214 NEXT_PASS (pass_cse_sincos
);
215 NEXT_PASS (pass_optimize_bswap
);
216 NEXT_PASS (pass_split_crit_edges
);
217 NEXT_PASS (pass_pre
);
218 NEXT_PASS (pass_sink_code
);
219 NEXT_PASS (pass_asan
);
220 NEXT_PASS (pass_tsan
);
221 /* Pass group that runs when
1) enabled
, 2) there are loops
222 in the function. Make sure to run pass_fix_loops before
223 to discover
/remove loops before running the gate function
224 of pass_tree_loop.
*/
225 NEXT_PASS (pass_fix_loops
);
226 NEXT_PASS (pass_tree_loop
);
227 PUSH_INSERT_PASSES_WITHIN (pass_tree_loop
)
228 NEXT_PASS (pass_tree_loop_init
);
229 NEXT_PASS (pass_lim
);
230 NEXT_PASS (pass_copy_prop
);
231 NEXT_PASS (pass_dce
);
232 NEXT_PASS (pass_tree_unswitch
);
233 NEXT_PASS (pass_scev_cprop
);
234 NEXT_PASS (pass_record_bounds
);
235 NEXT_PASS (pass_check_data_deps
);
236 NEXT_PASS (pass_loop_distribution
);
237 NEXT_PASS (pass_copy_prop
);
238 NEXT_PASS (pass_graphite
);
239 PUSH_INSERT_PASSES_WITHIN (pass_graphite
)
240 NEXT_PASS (pass_graphite_transforms
);
241 NEXT_PASS (pass_lim
);
242 NEXT_PASS (pass_copy_prop
);
243 NEXT_PASS (pass_dce
);
245 NEXT_PASS (pass_iv_canon
);
246 NEXT_PASS (pass_parallelize_loops
);
247 PUSH_INSERT_PASSES_WITHIN (pass_parallelize_loops
)
248 NEXT_PASS (pass_expand_omp_ssa
);
250 NEXT_PASS (pass_if_conversion
);
251 /* pass_vectorize must immediately follow pass_if_conversion.
252 Please do not add any other passes in between.
*/
253 NEXT_PASS (pass_vectorize
);
254 PUSH_INSERT_PASSES_WITHIN (pass_vectorize
)
255 NEXT_PASS (pass_dce
);
257 NEXT_PASS (pass_predcom
);
258 NEXT_PASS (pass_complete_unroll
);
259 NEXT_PASS (pass_slp_vectorize
);
260 NEXT_PASS (pass_loop_prefetch
);
261 /* Run IVOPTs after the last pass that uses data
-reference analysis
262 as that doesn
't handle TARGET_MEM_REFs. */
263 NEXT_PASS (pass_iv_optimize);
264 NEXT_PASS (pass_lim);
265 NEXT_PASS (pass_tree_loop_done);
267 /* Pass group that runs when pass_tree_loop is disabled or there
268 are no loops in the function. */
269 NEXT_PASS (pass_tree_no_loop);
270 PUSH_INSERT_PASSES_WITHIN (pass_tree_no_loop)
271 NEXT_PASS (pass_slp_vectorize);
273 NEXT_PASS (pass_lower_vector_ssa);
274 NEXT_PASS (pass_cse_reciprocals);
275 NEXT_PASS (pass_reassoc);
276 NEXT_PASS (pass_strength_reduction);
277 NEXT_PASS (pass_tracer);
278 NEXT_PASS (pass_dominator);
279 NEXT_PASS (pass_strlen);
280 NEXT_PASS (pass_vrp);
281 /* The only const/copy propagation opportunities left after
282 DOM and VRP should be due to degenerate PHI nodes. So rather than
283 run the full propagators, run a specialized pass which
284 only examines PHIs to discover const/copy propagation
286 NEXT_PASS (pass_phi_only_cprop);
287 NEXT_PASS (pass_cd_dce);
288 NEXT_PASS (pass_dse);
289 NEXT_PASS (pass_forwprop);
290 NEXT_PASS (pass_phiopt);
291 NEXT_PASS (pass_fold_builtins);
292 NEXT_PASS (pass_optimize_widening_mul);
293 NEXT_PASS (pass_tail_calls);
294 NEXT_PASS (pass_rename_ssa_copies);
295 /* FIXME: If DCE is not run before checking for uninitialized uses,
296 we may get false warnings (e.g., testsuite/gcc.dg/uninit-5.c).
297 However, this also causes us to misdiagnose cases that should be
298 real warnings (e.g., testsuite/gcc.dg/pr18501.c).
300 To fix the false positives in uninit-5.c, we would have to
301 account for the predicates protecting the set and the use of each
302 variable. Using a representation like Gated Single Assignment
304 /* Split critical edges before late uninit warning to reduce the
305 number of false positives from it. */
306 NEXT_PASS (pass_split_crit_edges);
307 NEXT_PASS (pass_late_warn_uninitialized);
308 NEXT_PASS (pass_uncprop);
309 NEXT_PASS (pass_local_pure_const);
311 NEXT_PASS (pass_all_optimizations_g);
312 PUSH_INSERT_PASSES_WITHIN (pass_all_optimizations_g)
313 NEXT_PASS (pass_remove_cgraph_callee_edges);
314 NEXT_PASS (pass_strip_predict_hints);
315 /* Lower remaining pieces of GIMPLE. */
316 NEXT_PASS (pass_lower_complex);
317 NEXT_PASS (pass_lower_vector_ssa);
318 /* Perform simple scalar cleanup which is constant/copy propagation. */
319 NEXT_PASS (pass_ccp);
320 NEXT_PASS (pass_object_sizes);
321 /* Fold remaining builtins. */
322 NEXT_PASS (pass_fold_builtins);
323 /* Copy propagation also copy-propagates constants, this is necessary
324 to forward object-size and builtin folding results properly. */
325 NEXT_PASS (pass_copy_prop);
326 NEXT_PASS (pass_dce);
327 NEXT_PASS (pass_asan);
328 NEXT_PASS (pass_tsan);
329 NEXT_PASS (pass_rename_ssa_copies);
330 /* ??? We do want some kind of loop invariant motion, but we possibly
331 need to adjust LIM to be more friendly towards preserving accurate
332 debug information here. */
333 /* Split critical edges before late uninit warning to reduce the
334 number of false positives from it. */
335 NEXT_PASS (pass_split_crit_edges);
336 NEXT_PASS (pass_late_warn_uninitialized);
337 NEXT_PASS (pass_uncprop);
338 NEXT_PASS (pass_local_pure_const);
340 NEXT_PASS (pass_tm_init);
341 PUSH_INSERT_PASSES_WITHIN (pass_tm_init)
342 NEXT_PASS (pass_tm_mark);
343 NEXT_PASS (pass_tm_memopt);
344 NEXT_PASS (pass_tm_edges);
346 NEXT_PASS (pass_vtable_verify);
347 NEXT_PASS (pass_lower_vaarg);
348 NEXT_PASS (pass_lower_vector);
349 NEXT_PASS (pass_lower_complex_O0);
350 NEXT_PASS (pass_asan_O0);
351 NEXT_PASS (pass_tsan_O0);
352 NEXT_PASS (pass_sanopt);
353 NEXT_PASS (pass_cleanup_eh);
354 NEXT_PASS (pass_lower_resx);
355 NEXT_PASS (pass_nrv);
356 NEXT_PASS (pass_cleanup_cfg_post_optimizing);
357 NEXT_PASS (pass_warn_function_noreturn);
359 NEXT_PASS (pass_expand);
361 NEXT_PASS (pass_rest_of_compilation);
362 PUSH_INSERT_PASSES_WITHIN (pass_rest_of_compilation)
363 NEXT_PASS (pass_instantiate_virtual_regs);
364 NEXT_PASS (pass_into_cfg_layout_mode);
365 NEXT_PASS (pass_jump);
366 NEXT_PASS (pass_lower_subreg);
367 NEXT_PASS (pass_df_initialize_opt);
368 NEXT_PASS (pass_cse);
369 NEXT_PASS (pass_rtl_fwprop);
370 NEXT_PASS (pass_rtl_cprop);
371 NEXT_PASS (pass_rtl_pre);
372 NEXT_PASS (pass_rtl_hoist);
373 NEXT_PASS (pass_rtl_cprop);
374 NEXT_PASS (pass_rtl_store_motion);
375 NEXT_PASS (pass_cse_after_global_opts);
376 NEXT_PASS (pass_rtl_ifcvt);
377 NEXT_PASS (pass_reginfo_init);
378 /* Perform loop optimizations. It might be better to do them a bit
379 sooner, but we want the profile feedback to work more
381 NEXT_PASS (pass_loop2);
382 PUSH_INSERT_PASSES_WITHIN (pass_loop2)
383 NEXT_PASS (pass_rtl_loop_init);
384 NEXT_PASS (pass_rtl_move_loop_invariants);
385 NEXT_PASS (pass_rtl_unroll_loops);
386 NEXT_PASS (pass_rtl_doloop);
387 NEXT_PASS (pass_rtl_loop_done);
388 TERMINATE_PASS_LIST ()
390 NEXT_PASS (pass_web);
391 NEXT_PASS (pass_rtl_cprop);
392 NEXT_PASS (pass_cse2);
393 NEXT_PASS (pass_rtl_dse1);
394 NEXT_PASS (pass_rtl_fwprop_addr);
395 NEXT_PASS (pass_inc_dec);
396 NEXT_PASS (pass_initialize_regs);
397 NEXT_PASS (pass_ud_rtl_dce);
398 NEXT_PASS (pass_combine);
399 NEXT_PASS (pass_if_after_combine);
400 NEXT_PASS (pass_partition_blocks);
401 NEXT_PASS (pass_outof_cfg_layout_mode);
402 NEXT_PASS (pass_split_all_insns);
403 NEXT_PASS (pass_lower_subreg2);
404 NEXT_PASS (pass_df_initialize_no_opt);
405 NEXT_PASS (pass_stack_ptr_mod);
406 NEXT_PASS (pass_mode_switching);
407 NEXT_PASS (pass_match_asm_constraints);
408 NEXT_PASS (pass_sms);
409 NEXT_PASS (pass_live_range_shrinkage);
410 NEXT_PASS (pass_sched);
411 NEXT_PASS (pass_ira);
412 NEXT_PASS (pass_reload);
413 NEXT_PASS (pass_postreload);
414 PUSH_INSERT_PASSES_WITHIN (pass_postreload)
415 NEXT_PASS (pass_postreload_cse);
416 NEXT_PASS (pass_gcse2);
417 NEXT_PASS (pass_split_after_reload);
418 NEXT_PASS (pass_ree);
419 NEXT_PASS (pass_compare_elim_after_reload);
420 NEXT_PASS (pass_branch_target_load_optimize1);
421 NEXT_PASS (pass_thread_prologue_and_epilogue);
422 NEXT_PASS (pass_rtl_dse2);
423 NEXT_PASS (pass_stack_adjustments);
424 NEXT_PASS (pass_jump2);
425 NEXT_PASS (pass_duplicate_computed_gotos);
426 NEXT_PASS (pass_sched_fusion);
427 NEXT_PASS (pass_peephole2);
428 NEXT_PASS (pass_if_after_reload);
429 NEXT_PASS (pass_regrename);
430 NEXT_PASS (pass_cprop_hardreg);
431 NEXT_PASS (pass_fast_rtl_dce);
432 NEXT_PASS (pass_reorder_blocks);
433 NEXT_PASS (pass_branch_target_load_optimize2);
434 NEXT_PASS (pass_leaf_regs);
435 NEXT_PASS (pass_split_before_sched2);
436 NEXT_PASS (pass_sched2);
437 NEXT_PASS (pass_stack_regs);
438 PUSH_INSERT_PASSES_WITHIN (pass_stack_regs)
439 NEXT_PASS (pass_split_before_regstack);
440 NEXT_PASS (pass_stack_regs_run);
443 NEXT_PASS (pass_late_compilation);
444 PUSH_INSERT_PASSES_WITHIN (pass_late_compilation)
445 NEXT_PASS (pass_compute_alignments);
446 NEXT_PASS (pass_variable_tracking);
447 NEXT_PASS (pass_free_cfg);
448 NEXT_PASS (pass_machine_reorg);
449 NEXT_PASS (pass_cleanup_barriers);
450 NEXT_PASS (pass_delay_slots);
451 NEXT_PASS (pass_split_for_shorten_branches);
452 NEXT_PASS (pass_convert_to_eh_region_ranges);
453 NEXT_PASS (pass_shorten_branches);
454 NEXT_PASS (pass_set_nothrow_function_flags);
455 NEXT_PASS (pass_dwarf2_frame);
456 NEXT_PASS (pass_final);
458 NEXT_PASS (pass_df_finish);
460 NEXT_PASS (pass_clean_state);
461 TERMINATE_PASS_LIST ()