1 /* Description of pass structure
2 Copyright (C
) 1987-2014 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_build_ssa_passes
);
54 PUSH_INSERT_PASSES_WITHIN (pass_build_ssa_passes
)
55 NEXT_PASS (pass_fixup_cfg
);
56 NEXT_PASS (pass_init_datastructures
);
57 NEXT_PASS (pass_build_ssa
);
58 NEXT_PASS (pass_ubsan
);
59 NEXT_PASS (pass_early_warn_uninitialized
);
62 NEXT_PASS (pass_chkp_instrumentation_passes
);
63 PUSH_INSERT_PASSES_WITHIN (pass_chkp_instrumentation_passes
)
64 NEXT_PASS (pass_fixup_cfg
);
65 NEXT_PASS (pass_chkp
);
66 NEXT_PASS (pass_rebuild_cgraph_edges
);
68 NEXT_PASS (pass_ipa_chkp_produce_thunks
);
70 NEXT_PASS (pass_local_optimization_passes
);
71 PUSH_INSERT_PASSES_WITHIN (pass_local_optimization_passes
)
72 NEXT_PASS (pass_fixup_cfg
);
73 NEXT_PASS (pass_rebuild_cgraph_edges
);
74 NEXT_PASS (pass_inline_parameters
);
75 NEXT_PASS (pass_early_inline
);
76 NEXT_PASS (pass_all_early_optimizations
);
77 PUSH_INSERT_PASSES_WITHIN (pass_all_early_optimizations
)
78 NEXT_PASS (pass_remove_cgraph_callee_edges
);
79 NEXT_PASS (pass_rename_ssa_copies
);
81 /* After CCP we rewrite no longer addressed locals into SSA
83 NEXT_PASS (pass_forwprop
);
84 NEXT_PASS (pass_sra_early
);
85 /* pass_build_ealias is a dummy pass that ensures that we
86 execute TODO_rebuild_alias at this point.
*/
87 NEXT_PASS (pass_build_ealias
);
89 NEXT_PASS (pass_merge_phi
);
90 NEXT_PASS (pass_cd_dce
);
91 NEXT_PASS (pass_early_ipa_sra
);
92 NEXT_PASS (pass_tail_recursion
);
93 NEXT_PASS (pass_convert_switch
);
94 NEXT_PASS (pass_cleanup_eh
);
95 NEXT_PASS (pass_profile
);
96 NEXT_PASS (pass_local_pure_const
);
97 /* Split functions creates parts that are not run through
98 early optimizations again. It is thus good idea to do this
100 NEXT_PASS (pass_split_functions
);
102 NEXT_PASS (pass_release_ssa_names
);
103 NEXT_PASS (pass_rebuild_cgraph_edges
);
104 NEXT_PASS (pass_inline_parameters
);
106 NEXT_PASS (pass_ipa_auto_profile
);
107 NEXT_PASS (pass_ipa_free_inline_summary
);
108 NEXT_PASS (pass_ipa_tree_profile
);
109 PUSH_INSERT_PASSES_WITHIN (pass_ipa_tree_profile
)
110 NEXT_PASS (pass_feedback_split_functions
);
112 NEXT_PASS (pass_ipa_increase_alignment
);
113 NEXT_PASS (pass_ipa_tm
);
114 NEXT_PASS (pass_ipa_lower_emutls
);
115 TERMINATE_PASS_LIST ()
117 INSERT_PASSES_AFTER (all_regular_ipa_passes
)
118 NEXT_PASS (pass_ipa_whole_program_visibility
);
119 NEXT_PASS (pass_ipa_profile
);
120 NEXT_PASS (pass_ipa_icf
);
121 NEXT_PASS (pass_ipa_devirt
);
122 NEXT_PASS (pass_ipa_cp
);
123 NEXT_PASS (pass_ipa_cdtor_merge
);
124 NEXT_PASS (pass_ipa_inline
);
125 NEXT_PASS (pass_ipa_pure_const
);
126 NEXT_PASS (pass_ipa_reference
);
127 /* This pass needs to be scheduled after any IP code duplication.
*/
128 NEXT_PASS (pass_ipa_single_use
);
129 /* Comdat privatization come last
, as direct references to comdat local
130 symbols are not allowed outside of the comdat group. Privatizing early
131 would result in missed optimizations due to this restriction.
*/
132 NEXT_PASS (pass_ipa_comdats
);
133 TERMINATE_PASS_LIST ()
135 /* Simple IPA passes executed after the regular passes. In WHOPR mode the
136 passes are executed after partitioning and thus see just parts of the
138 INSERT_PASSES_AFTER (all_late_ipa_passes
)
139 NEXT_PASS (pass_ipa_pta
);
140 NEXT_PASS (pass_omp_simd_clone
);
141 TERMINATE_PASS_LIST ()
143 /* These passes are run after IPA passes on every function that is being
144 output to the assembler file.
*/
145 INSERT_PASSES_AFTER (all_passes
)
146 NEXT_PASS (pass_fixup_cfg
);
147 NEXT_PASS (pass_lower_eh_dispatch
);
148 NEXT_PASS (pass_all_optimizations
);
149 PUSH_INSERT_PASSES_WITHIN (pass_all_optimizations
)
150 NEXT_PASS (pass_remove_cgraph_callee_edges
);
151 /* Initial scalar cleanups before alias computation.
152 They ensure memory accesses are not indirect wherever possible.
*/
153 NEXT_PASS (pass_strip_predict_hints
);
154 NEXT_PASS (pass_rename_ssa_copies
);
155 NEXT_PASS (pass_ccp
);
156 /* After CCP we rewrite no longer addressed locals into SSA
158 NEXT_PASS (pass_copy_prop
);
159 NEXT_PASS (pass_complete_unrolli
);
160 NEXT_PASS (pass_phiprop
);
161 NEXT_PASS (pass_forwprop
);
162 NEXT_PASS (pass_object_sizes
);
163 /* pass_build_alias is a dummy pass that ensures that we
164 execute TODO_rebuild_alias at this point.
*/
165 NEXT_PASS (pass_build_alias
);
166 NEXT_PASS (pass_return_slot
);
167 NEXT_PASS (pass_fre
);
168 NEXT_PASS (pass_merge_phi
);
169 NEXT_PASS (pass_vrp
);
170 NEXT_PASS (pass_chkp_opt
);
171 NEXT_PASS (pass_dce
);
172 NEXT_PASS (pass_call_cdce
);
173 NEXT_PASS (pass_cselim
);
174 NEXT_PASS (pass_copy_prop
);
175 NEXT_PASS (pass_tree_ifcombine
);
176 NEXT_PASS (pass_phiopt
);
177 NEXT_PASS (pass_tail_recursion
);
179 NEXT_PASS (pass_stdarg
);
180 NEXT_PASS (pass_lower_complex
);
181 NEXT_PASS (pass_sra
);
182 NEXT_PASS (pass_rename_ssa_copies
);
183 /* The dom pass will also resolve all __builtin_constant_p calls
184 that are still there to
0. This has to be done after some
185 propagations have already run
, but before some more dead code
186 is removed
, and this place fits nicely. Remember this when
187 trying to move or duplicate pass_dominator somewhere earlier.
*/
188 NEXT_PASS (pass_dominator
);
189 /* At this point the majority of const
/copy propagations
190 are exposed. Go ahead and identify paths that should never
191 be executed in a conforming program and isolate those paths.
193 This will expose more degenerate PHIs in the main path and
194 expose more PRE
/DOM optimization opportunities.
*/
195 NEXT_PASS (pass_isolate_erroneous_paths
);
196 /* The only const
/copy propagation opportunities left after
197 DOM and erroneous path isolation should be due to degenerate PHI nodes.
198 So rather than run the full propagators
, run a specialized pass which
199 only examines PHIs to discover const
/copy propagation
201 NEXT_PASS (pass_phi_only_cprop
);
202 NEXT_PASS (pass_dse
);
203 NEXT_PASS (pass_reassoc
);
204 NEXT_PASS (pass_dce
);
205 NEXT_PASS (pass_forwprop
);
206 NEXT_PASS (pass_phiopt
);
207 NEXT_PASS (pass_ccp
);
208 /* After CCP we rewrite no longer addressed locals into SSA
210 NEXT_PASS (pass_copy_prop
);
211 NEXT_PASS (pass_cse_sincos
);
212 NEXT_PASS (pass_optimize_bswap
);
213 NEXT_PASS (pass_split_crit_edges
);
214 NEXT_PASS (pass_pre
);
215 NEXT_PASS (pass_sink_code
);
216 NEXT_PASS (pass_asan
);
217 NEXT_PASS (pass_tsan
);
218 /* Pass group that runs when
1) enabled
, 2) there are loops
219 in the function. Make sure to run pass_fix_loops before
220 to discover
/remove loops before running the gate function
221 of pass_tree_loop.
*/
222 NEXT_PASS (pass_fix_loops
);
223 NEXT_PASS (pass_tree_loop
);
224 PUSH_INSERT_PASSES_WITHIN (pass_tree_loop
)
225 NEXT_PASS (pass_tree_loop_init
);
226 NEXT_PASS (pass_lim
);
227 NEXT_PASS (pass_copy_prop
);
228 NEXT_PASS (pass_dce
);
229 NEXT_PASS (pass_tree_unswitch
);
230 NEXT_PASS (pass_scev_cprop
);
231 NEXT_PASS (pass_record_bounds
);
232 NEXT_PASS (pass_check_data_deps
);
233 NEXT_PASS (pass_loop_distribution
);
234 NEXT_PASS (pass_copy_prop
);
235 NEXT_PASS (pass_graphite
);
236 PUSH_INSERT_PASSES_WITHIN (pass_graphite
)
237 NEXT_PASS (pass_graphite_transforms
);
238 NEXT_PASS (pass_lim
);
239 NEXT_PASS (pass_copy_prop
);
240 NEXT_PASS (pass_dce
);
242 NEXT_PASS (pass_iv_canon
);
243 NEXT_PASS (pass_parallelize_loops
);
244 NEXT_PASS (pass_if_conversion
);
245 /* pass_vectorize must immediately follow pass_if_conversion.
246 Please do not add any other passes in between.
*/
247 NEXT_PASS (pass_vectorize
);
248 PUSH_INSERT_PASSES_WITHIN (pass_vectorize
)
249 NEXT_PASS (pass_dce
);
251 NEXT_PASS (pass_predcom
);
252 NEXT_PASS (pass_complete_unroll
);
253 NEXT_PASS (pass_slp_vectorize
);
254 NEXT_PASS (pass_loop_prefetch
);
255 /* Run IVOPTs after the last pass that uses data
-reference analysis
256 as that doesn
't handle TARGET_MEM_REFs. */
257 NEXT_PASS (pass_iv_optimize);
258 NEXT_PASS (pass_lim);
259 NEXT_PASS (pass_tree_loop_done);
261 /* Pass group that runs when pass_tree_loop is disabled or there
262 are no loops in the function. */
263 NEXT_PASS (pass_tree_no_loop);
264 PUSH_INSERT_PASSES_WITHIN (pass_tree_no_loop)
265 NEXT_PASS (pass_slp_vectorize);
267 NEXT_PASS (pass_lower_vector_ssa);
268 NEXT_PASS (pass_cse_reciprocals);
269 NEXT_PASS (pass_reassoc);
270 NEXT_PASS (pass_strength_reduction);
271 NEXT_PASS (pass_tracer);
272 NEXT_PASS (pass_dominator);
273 NEXT_PASS (pass_strlen);
274 NEXT_PASS (pass_vrp);
275 /* The only const/copy propagation opportunities left after
276 DOM and VRP should be due to degenerate PHI nodes. So rather than
277 run the full propagators, run a specialized pass which
278 only examines PHIs to discover const/copy propagation
280 NEXT_PASS (pass_phi_only_cprop);
281 NEXT_PASS (pass_cd_dce);
282 NEXT_PASS (pass_dse);
283 NEXT_PASS (pass_forwprop);
284 NEXT_PASS (pass_phiopt);
285 NEXT_PASS (pass_fold_builtins);
286 NEXT_PASS (pass_optimize_widening_mul);
287 NEXT_PASS (pass_tail_calls);
288 NEXT_PASS (pass_rename_ssa_copies);
289 /* FIXME: If DCE is not run before checking for uninitialized uses,
290 we may get false warnings (e.g., testsuite/gcc.dg/uninit-5.c).
291 However, this also causes us to misdiagnose cases that should be
292 real warnings (e.g., testsuite/gcc.dg/pr18501.c).
294 To fix the false positives in uninit-5.c, we would have to
295 account for the predicates protecting the set and the use of each
296 variable. Using a representation like Gated Single Assignment
298 /* Split critical edges before late uninit warning to reduce the
299 number of false positives from it. */
300 NEXT_PASS (pass_split_crit_edges);
301 NEXT_PASS (pass_late_warn_uninitialized);
302 NEXT_PASS (pass_uncprop);
303 NEXT_PASS (pass_local_pure_const);
305 NEXT_PASS (pass_all_optimizations_g);
306 PUSH_INSERT_PASSES_WITHIN (pass_all_optimizations_g)
307 NEXT_PASS (pass_remove_cgraph_callee_edges);
308 NEXT_PASS (pass_strip_predict_hints);
309 /* Lower remaining pieces of GIMPLE. */
310 NEXT_PASS (pass_lower_complex);
311 NEXT_PASS (pass_lower_vector_ssa);
312 /* Perform simple scalar cleanup which is constant/copy propagation. */
313 NEXT_PASS (pass_ccp);
314 NEXT_PASS (pass_object_sizes);
315 /* Fold remaining builtins. */
316 NEXT_PASS (pass_fold_builtins);
317 /* Copy propagation also copy-propagates constants, this is necessary
318 to forward object-size and builtin folding results properly. */
319 NEXT_PASS (pass_copy_prop);
320 NEXT_PASS (pass_dce);
321 NEXT_PASS (pass_asan);
322 NEXT_PASS (pass_tsan);
323 NEXT_PASS (pass_rename_ssa_copies);
324 /* ??? We do want some kind of loop invariant motion, but we possibly
325 need to adjust LIM to be more friendly towards preserving accurate
326 debug information here. */
327 /* Split critical edges before late uninit warning to reduce the
328 number of false positives from it. */
329 NEXT_PASS (pass_split_crit_edges);
330 NEXT_PASS (pass_late_warn_uninitialized);
331 NEXT_PASS (pass_uncprop);
332 NEXT_PASS (pass_local_pure_const);
334 NEXT_PASS (pass_tm_init);
335 PUSH_INSERT_PASSES_WITHIN (pass_tm_init)
336 NEXT_PASS (pass_tm_mark);
337 NEXT_PASS (pass_tm_memopt);
338 NEXT_PASS (pass_tm_edges);
340 NEXT_PASS (pass_vtable_verify);
341 NEXT_PASS (pass_lower_vector);
342 NEXT_PASS (pass_lower_complex_O0);
343 NEXT_PASS (pass_asan_O0);
344 NEXT_PASS (pass_tsan_O0);
345 NEXT_PASS (pass_sanopt);
346 NEXT_PASS (pass_cleanup_eh);
347 NEXT_PASS (pass_lower_resx);
348 NEXT_PASS (pass_nrv);
349 NEXT_PASS (pass_cleanup_cfg_post_optimizing);
350 NEXT_PASS (pass_warn_function_noreturn);
352 NEXT_PASS (pass_expand);
354 NEXT_PASS (pass_rest_of_compilation);
355 PUSH_INSERT_PASSES_WITHIN (pass_rest_of_compilation)
356 NEXT_PASS (pass_instantiate_virtual_regs);
357 NEXT_PASS (pass_into_cfg_layout_mode);
358 NEXT_PASS (pass_jump);
359 NEXT_PASS (pass_lower_subreg);
360 NEXT_PASS (pass_df_initialize_opt);
361 NEXT_PASS (pass_cse);
362 NEXT_PASS (pass_rtl_fwprop);
363 NEXT_PASS (pass_rtl_cprop);
364 NEXT_PASS (pass_rtl_pre);
365 NEXT_PASS (pass_rtl_hoist);
366 NEXT_PASS (pass_rtl_cprop);
367 NEXT_PASS (pass_rtl_store_motion);
368 NEXT_PASS (pass_cse_after_global_opts);
369 NEXT_PASS (pass_rtl_ifcvt);
370 NEXT_PASS (pass_reginfo_init);
371 /* Perform loop optimizations. It might be better to do them a bit
372 sooner, but we want the profile feedback to work more
374 NEXT_PASS (pass_loop2);
375 PUSH_INSERT_PASSES_WITHIN (pass_loop2)
376 NEXT_PASS (pass_rtl_loop_init);
377 NEXT_PASS (pass_rtl_move_loop_invariants);
378 NEXT_PASS (pass_rtl_unroll_loops);
379 NEXT_PASS (pass_rtl_doloop);
380 NEXT_PASS (pass_rtl_loop_done);
381 TERMINATE_PASS_LIST ()
383 NEXT_PASS (pass_web);
384 NEXT_PASS (pass_rtl_cprop);
385 NEXT_PASS (pass_cse2);
386 NEXT_PASS (pass_rtl_dse1);
387 NEXT_PASS (pass_rtl_fwprop_addr);
388 NEXT_PASS (pass_inc_dec);
389 NEXT_PASS (pass_initialize_regs);
390 NEXT_PASS (pass_ud_rtl_dce);
391 NEXT_PASS (pass_combine);
392 NEXT_PASS (pass_if_after_combine);
393 NEXT_PASS (pass_partition_blocks);
394 NEXT_PASS (pass_outof_cfg_layout_mode);
395 NEXT_PASS (pass_split_all_insns);
396 NEXT_PASS (pass_lower_subreg2);
397 NEXT_PASS (pass_df_initialize_no_opt);
398 NEXT_PASS (pass_stack_ptr_mod);
399 NEXT_PASS (pass_mode_switching);
400 NEXT_PASS (pass_match_asm_constraints);
401 NEXT_PASS (pass_sms);
402 NEXT_PASS (pass_live_range_shrinkage);
403 NEXT_PASS (pass_sched);
404 NEXT_PASS (pass_ira);
405 NEXT_PASS (pass_reload);
406 NEXT_PASS (pass_postreload);
407 PUSH_INSERT_PASSES_WITHIN (pass_postreload)
408 NEXT_PASS (pass_postreload_cse);
409 NEXT_PASS (pass_gcse2);
410 NEXT_PASS (pass_split_after_reload);
411 NEXT_PASS (pass_ree);
412 NEXT_PASS (pass_compare_elim_after_reload);
413 NEXT_PASS (pass_branch_target_load_optimize1);
414 NEXT_PASS (pass_thread_prologue_and_epilogue);
415 NEXT_PASS (pass_rtl_dse2);
416 NEXT_PASS (pass_stack_adjustments);
417 NEXT_PASS (pass_jump2);
418 NEXT_PASS (pass_duplicate_computed_gotos);
419 NEXT_PASS (pass_peephole2);
420 NEXT_PASS (pass_if_after_reload);
421 NEXT_PASS (pass_regrename);
422 NEXT_PASS (pass_cprop_hardreg);
423 NEXT_PASS (pass_fast_rtl_dce);
424 NEXT_PASS (pass_reorder_blocks);
425 NEXT_PASS (pass_branch_target_load_optimize2);
426 NEXT_PASS (pass_leaf_regs);
427 NEXT_PASS (pass_split_before_sched2);
428 NEXT_PASS (pass_sched2);
429 NEXT_PASS (pass_stack_regs);
430 PUSH_INSERT_PASSES_WITHIN (pass_stack_regs)
431 NEXT_PASS (pass_split_before_regstack);
432 NEXT_PASS (pass_stack_regs_run);
435 NEXT_PASS (pass_late_compilation);
436 PUSH_INSERT_PASSES_WITHIN (pass_late_compilation)
437 NEXT_PASS (pass_compute_alignments);
438 NEXT_PASS (pass_variable_tracking);
439 NEXT_PASS (pass_free_cfg);
440 NEXT_PASS (pass_machine_reorg);
441 NEXT_PASS (pass_cleanup_barriers);
442 NEXT_PASS (pass_delay_slots);
443 NEXT_PASS (pass_split_for_shorten_branches);
444 NEXT_PASS (pass_convert_to_eh_region_ranges);
445 NEXT_PASS (pass_shorten_branches);
446 NEXT_PASS (pass_set_nothrow_function_flags);
447 NEXT_PASS (pass_dwarf2_frame);
448 NEXT_PASS (pass_final);
450 NEXT_PASS (pass_df_finish);
452 NEXT_PASS (pass_clean_state);
453 TERMINATE_PASS_LIST ()