/* Description of pass structure Copyright (C) 1987-2020 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see . */ /* Macros that should be defined when using this file: INSERT_PASSES_AFTER (PASS) PUSH_INSERT_PASSES_WITHIN (PASS) POP_INSERT_PASSES () NEXT_PASS (PASS) TERMINATE_PASS_LIST (PASS) */ /* All passes needed to lower the function into shape optimizers can operate on. These passes are always run first on the function, but backend might produce already lowered functions that are not processed by these passes. */ INSERT_PASSES_AFTER (all_lowering_passes) NEXT_PASS (pass_warn_unused_result); NEXT_PASS (pass_diagnose_omp_blocks); NEXT_PASS (pass_diagnose_tm_blocks); NEXT_PASS (pass_lower_omp); NEXT_PASS (pass_lower_cf); NEXT_PASS (pass_lower_tm); NEXT_PASS (pass_refactor_eh); NEXT_PASS (pass_lower_eh); NEXT_PASS (pass_coroutine_lower_builtins); NEXT_PASS (pass_build_cfg); NEXT_PASS (pass_warn_function_return); NEXT_PASS (pass_coroutine_early_expand_ifns); NEXT_PASS (pass_expand_omp); NEXT_PASS (pass_warn_printf); NEXT_PASS (pass_walloca, /*strict_mode_p=*/true); NEXT_PASS (pass_build_cgraph_edges); TERMINATE_PASS_LIST (all_lowering_passes) /* Interprocedural optimization passes. */ INSERT_PASSES_AFTER (all_small_ipa_passes) NEXT_PASS (pass_ipa_free_lang_data); NEXT_PASS (pass_ipa_function_and_variable_visibility); NEXT_PASS (pass_build_ssa_passes); PUSH_INSERT_PASSES_WITHIN (pass_build_ssa_passes) NEXT_PASS (pass_fixup_cfg); NEXT_PASS (pass_build_ssa); NEXT_PASS (pass_warn_nonnull_compare); NEXT_PASS (pass_early_warn_uninitialized); NEXT_PASS (pass_ubsan); NEXT_PASS (pass_nothrow); NEXT_PASS (pass_rebuild_cgraph_edges); POP_INSERT_PASSES () NEXT_PASS (pass_local_optimization_passes); PUSH_INSERT_PASSES_WITHIN (pass_local_optimization_passes) NEXT_PASS (pass_fixup_cfg); NEXT_PASS (pass_rebuild_cgraph_edges); NEXT_PASS (pass_local_fn_summary); NEXT_PASS (pass_early_inline); NEXT_PASS (pass_all_early_optimizations); PUSH_INSERT_PASSES_WITHIN (pass_all_early_optimizations) NEXT_PASS (pass_remove_cgraph_callee_edges); NEXT_PASS (pass_object_sizes, true /* insert_min_max_p */); /* Don't record nonzero bits before IPA to avoid using too much memory. */ NEXT_PASS (pass_ccp, false /* nonzero_p */); /* After CCP we rewrite no longer addressed locals into SSA form if possible. */ NEXT_PASS (pass_forwprop); NEXT_PASS (pass_early_thread_jumps); NEXT_PASS (pass_sra_early); /* pass_build_ealias is a dummy pass that ensures that we execute TODO_rebuild_alias at this point. */ NEXT_PASS (pass_build_ealias); NEXT_PASS (pass_fre, true /* may_iterate */); NEXT_PASS (pass_early_vrp); NEXT_PASS (pass_merge_phi); NEXT_PASS (pass_dse); NEXT_PASS (pass_cd_dce); NEXT_PASS (pass_phiopt, true /* early_p */); NEXT_PASS (pass_tail_recursion); NEXT_PASS (pass_convert_switch); NEXT_PASS (pass_cleanup_eh); NEXT_PASS (pass_profile); NEXT_PASS (pass_local_pure_const); /* Split functions creates parts that are not run through early optimizations again. It is thus good idea to do this late. */ NEXT_PASS (pass_split_functions); NEXT_PASS (pass_strip_predict_hints, true /* early_p */); POP_INSERT_PASSES () NEXT_PASS (pass_release_ssa_names); NEXT_PASS (pass_rebuild_cgraph_edges); NEXT_PASS (pass_local_fn_summary); POP_INSERT_PASSES () NEXT_PASS (pass_ipa_remove_symbols); NEXT_PASS (pass_ipa_oacc); PUSH_INSERT_PASSES_WITHIN (pass_ipa_oacc) NEXT_PASS (pass_ipa_pta); /* Pass group that runs when the function is an offloaded function containing oacc kernels loops. */ NEXT_PASS (pass_ipa_oacc_kernels); PUSH_INSERT_PASSES_WITHIN (pass_ipa_oacc_kernels) NEXT_PASS (pass_oacc_kernels); PUSH_INSERT_PASSES_WITHIN (pass_oacc_kernels) NEXT_PASS (pass_ch); NEXT_PASS (pass_fre, true /* may_iterate */); /* We use pass_lim to rewrite in-memory iteration and reduction variable accesses in loops into local variables accesses. */ NEXT_PASS (pass_lim); NEXT_PASS (pass_dominator, false /* may_peel_loop_headers_p */); NEXT_PASS (pass_dce); NEXT_PASS (pass_parallelize_loops, true /* oacc_kernels_p */); NEXT_PASS (pass_expand_omp_ssa); NEXT_PASS (pass_rebuild_cgraph_edges); POP_INSERT_PASSES () POP_INSERT_PASSES () POP_INSERT_PASSES () NEXT_PASS (pass_target_clone); NEXT_PASS (pass_ipa_auto_profile); NEXT_PASS (pass_ipa_tree_profile); PUSH_INSERT_PASSES_WITHIN (pass_ipa_tree_profile) NEXT_PASS (pass_feedback_split_functions); POP_INSERT_PASSES () NEXT_PASS (pass_ipa_free_fn_summary, true /* small_p */); NEXT_PASS (pass_ipa_increase_alignment); NEXT_PASS (pass_ipa_tm); NEXT_PASS (pass_ipa_lower_emutls); TERMINATE_PASS_LIST (all_small_ipa_passes) INSERT_PASSES_AFTER (all_regular_ipa_passes) NEXT_PASS (pass_analyzer); NEXT_PASS (pass_ipa_whole_program_visibility); NEXT_PASS (pass_ipa_profile); NEXT_PASS (pass_ipa_icf); NEXT_PASS (pass_ipa_devirt); NEXT_PASS (pass_ipa_cp); NEXT_PASS (pass_ipa_sra); NEXT_PASS (pass_ipa_cdtor_merge); NEXT_PASS (pass_ipa_hsa); NEXT_PASS (pass_ipa_fn_summary); NEXT_PASS (pass_ipa_inline); NEXT_PASS (pass_ipa_pure_const); NEXT_PASS (pass_ipa_free_fn_summary, false /* small_p */); NEXT_PASS (pass_ipa_reference); /* This pass needs to be scheduled after any IP code duplication. */ NEXT_PASS (pass_ipa_single_use); /* Comdat privatization come last, as direct references to comdat local symbols are not allowed outside of the comdat group. Privatizing early would result in missed optimizations due to this restriction. */ NEXT_PASS (pass_ipa_comdats); TERMINATE_PASS_LIST (all_regular_ipa_passes) /* Simple IPA passes executed after the regular passes. In WHOPR mode the passes are executed after partitioning and thus see just parts of the compiled unit. */ INSERT_PASSES_AFTER (all_late_ipa_passes) NEXT_PASS (pass_materialize_all_clones); NEXT_PASS (pass_ipa_pta); NEXT_PASS (pass_omp_simd_clone); TERMINATE_PASS_LIST (all_late_ipa_passes) /* These passes are run after IPA passes on every function that is being output to the assembler file. */ INSERT_PASSES_AFTER (all_passes) NEXT_PASS (pass_fixup_cfg); NEXT_PASS (pass_lower_eh_dispatch); NEXT_PASS (pass_oacc_device_lower); NEXT_PASS (pass_omp_device_lower); NEXT_PASS (pass_omp_target_link); NEXT_PASS (pass_all_optimizations); PUSH_INSERT_PASSES_WITHIN (pass_all_optimizations) NEXT_PASS (pass_remove_cgraph_callee_edges); /* Initial scalar cleanups before alias computation. They ensure memory accesses are not indirect wherever possible. */ NEXT_PASS (pass_strip_predict_hints, false /* early_p */); NEXT_PASS (pass_ccp, true /* nonzero_p */); NEXT_PASS (pass_post_ipa_warn); /* After CCP we rewrite no longer addressed locals into SSA form if possible. */ NEXT_PASS (pass_complete_unrolli); NEXT_PASS (pass_backprop); NEXT_PASS (pass_phiprop); NEXT_PASS (pass_forwprop); NEXT_PASS (pass_object_sizes, false /* insert_min_max_p */); /* pass_build_alias is a dummy pass that ensures that we execute TODO_rebuild_alias at this point. */ NEXT_PASS (pass_build_alias); NEXT_PASS (pass_return_slot); NEXT_PASS (pass_fre, true /* may_iterate */); NEXT_PASS (pass_merge_phi); NEXT_PASS (pass_thread_jumps); NEXT_PASS (pass_vrp, true /* warn_array_bounds_p */); NEXT_PASS (pass_dce); NEXT_PASS (pass_stdarg); NEXT_PASS (pass_call_cdce); NEXT_PASS (pass_cselim); NEXT_PASS (pass_copy_prop); NEXT_PASS (pass_tree_ifcombine); NEXT_PASS (pass_merge_phi); NEXT_PASS (pass_phiopt, false /* early_p */); NEXT_PASS (pass_tail_recursion); NEXT_PASS (pass_ch); NEXT_PASS (pass_lower_complex); NEXT_PASS (pass_sra); /* The dom pass will also resolve all __builtin_constant_p calls that are still there to 0. This has to be done after some propagations have already run, but before some more dead code is removed, and this place fits nicely. Remember this when trying to move or duplicate pass_dominator somewhere earlier. */ NEXT_PASS (pass_thread_jumps); NEXT_PASS (pass_dominator, true /* may_peel_loop_headers_p */); /* Threading can leave many const/copy propagations in the IL. Clean them up. Failure to do so well can lead to false positives from warnings for erroneous code. */ NEXT_PASS (pass_copy_prop); /* Identify paths that should never be executed in a conforming program and isolate those paths. */ NEXT_PASS (pass_isolate_erroneous_paths); NEXT_PASS (pass_dse); NEXT_PASS (pass_reassoc, true /* insert_powi_p */); NEXT_PASS (pass_dce); NEXT_PASS (pass_forwprop); NEXT_PASS (pass_phiopt, false /* early_p */); NEXT_PASS (pass_ccp, true /* nonzero_p */); /* After CCP we rewrite no longer addressed locals into SSA form if possible. */ NEXT_PASS (pass_cse_sincos); NEXT_PASS (pass_optimize_bswap); NEXT_PASS (pass_laddress); NEXT_PASS (pass_lim); NEXT_PASS (pass_walloca, false); NEXT_PASS (pass_pre); NEXT_PASS (pass_sink_code); NEXT_PASS (pass_sancov); NEXT_PASS (pass_asan); NEXT_PASS (pass_tsan); NEXT_PASS (pass_dce); /* Pass group that runs when 1) enabled, 2) there are loops in the function. Make sure to run pass_fix_loops before to discover/remove loops before running the gate function of pass_tree_loop. */ NEXT_PASS (pass_fix_loops); NEXT_PASS (pass_tree_loop); PUSH_INSERT_PASSES_WITHIN (pass_tree_loop) /* Before loop_init we rewrite no longer addressed locals into SSA form if possible. */ NEXT_PASS (pass_tree_loop_init); NEXT_PASS (pass_tree_unswitch); NEXT_PASS (pass_scev_cprop); NEXT_PASS (pass_loop_split); NEXT_PASS (pass_loop_versioning); NEXT_PASS (pass_loop_jam); /* All unswitching, final value replacement and splitting can expose empty loops. Remove them now. */ NEXT_PASS (pass_cd_dce); NEXT_PASS (pass_iv_canon); NEXT_PASS (pass_loop_distribution); NEXT_PASS (pass_linterchange); NEXT_PASS (pass_copy_prop); NEXT_PASS (pass_graphite); PUSH_INSERT_PASSES_WITHIN (pass_graphite) NEXT_PASS (pass_graphite_transforms); NEXT_PASS (pass_lim); NEXT_PASS (pass_copy_prop); NEXT_PASS (pass_dce); POP_INSERT_PASSES () NEXT_PASS (pass_parallelize_loops, false /* oacc_kernels_p */); NEXT_PASS (pass_expand_omp_ssa); NEXT_PASS (pass_ch_vect); NEXT_PASS (pass_if_conversion); /* pass_vectorize must immediately follow pass_if_conversion. Please do not add any other passes in between. */ NEXT_PASS (pass_vectorize); PUSH_INSERT_PASSES_WITHIN (pass_vectorize) NEXT_PASS (pass_dce); POP_INSERT_PASSES () NEXT_PASS (pass_predcom); NEXT_PASS (pass_complete_unroll); NEXT_PASS (pass_slp_vectorize); NEXT_PASS (pass_loop_prefetch); /* Run IVOPTs after the last pass that uses data-reference analysis as that doesn't handle TARGET_MEM_REFs. */ NEXT_PASS (pass_iv_optimize); NEXT_PASS (pass_lim); NEXT_PASS (pass_tree_loop_done); POP_INSERT_PASSES () /* Pass group that runs when pass_tree_loop is disabled or there are no loops in the function. */ NEXT_PASS (pass_tree_no_loop); PUSH_INSERT_PASSES_WITHIN (pass_tree_no_loop) NEXT_PASS (pass_slp_vectorize); POP_INSERT_PASSES () NEXT_PASS (pass_simduid_cleanup); NEXT_PASS (pass_lower_vector_ssa); NEXT_PASS (pass_lower_switch); NEXT_PASS (pass_cse_reciprocals); NEXT_PASS (pass_reassoc, false /* insert_powi_p */); NEXT_PASS (pass_strength_reduction); NEXT_PASS (pass_split_paths); NEXT_PASS (pass_tracer); NEXT_PASS (pass_fre, false /* may_iterate */); /* After late FRE we rewrite no longer addressed locals into SSA form if possible. */ NEXT_PASS (pass_thread_jumps); NEXT_PASS (pass_dominator, false /* may_peel_loop_headers_p */); NEXT_PASS (pass_strlen); NEXT_PASS (pass_thread_jumps); NEXT_PASS (pass_vrp, false /* warn_array_bounds_p */); /* Threading can leave many const/copy propagations in the IL. Clean them up. */ NEXT_PASS (pass_copy_prop); NEXT_PASS (pass_warn_restrict); NEXT_PASS (pass_dse); NEXT_PASS (pass_cd_dce); NEXT_PASS (pass_forwprop); NEXT_PASS (pass_phiopt, false /* early_p */); NEXT_PASS (pass_fold_builtins); NEXT_PASS (pass_optimize_widening_mul); NEXT_PASS (pass_store_merging); NEXT_PASS (pass_tail_calls); /* If DCE is not run before checking for uninitialized uses, we may get false warnings (e.g., testsuite/gcc.dg/uninit-5.c). However, this also causes us to misdiagnose cases that should be real warnings (e.g., testsuite/gcc.dg/pr18501.c). */ NEXT_PASS (pass_dce); /* Split critical edges before late uninit warning to reduce the number of false positives from it. */ NEXT_PASS (pass_split_crit_edges); NEXT_PASS (pass_late_warn_uninitialized); NEXT_PASS (pass_uncprop); NEXT_PASS (pass_local_pure_const); POP_INSERT_PASSES () NEXT_PASS (pass_all_optimizations_g); PUSH_INSERT_PASSES_WITHIN (pass_all_optimizations_g) NEXT_PASS (pass_remove_cgraph_callee_edges); NEXT_PASS (pass_strip_predict_hints, false /* early_p */); /* Lower remaining pieces of GIMPLE. */ NEXT_PASS (pass_lower_complex); NEXT_PASS (pass_lower_vector_ssa); NEXT_PASS (pass_lower_switch); /* Perform simple scalar cleanup which is constant/copy propagation. */ NEXT_PASS (pass_ccp, true /* nonzero_p */); NEXT_PASS (pass_post_ipa_warn); NEXT_PASS (pass_object_sizes); /* Fold remaining builtins. */ NEXT_PASS (pass_fold_builtins); NEXT_PASS (pass_strlen); /* Copy propagation also copy-propagates constants, this is necessary to forward object-size and builtin folding results properly. */ NEXT_PASS (pass_copy_prop); NEXT_PASS (pass_dce); NEXT_PASS (pass_sancov); NEXT_PASS (pass_asan); NEXT_PASS (pass_tsan); /* ??? We do want some kind of loop invariant motion, but we possibly need to adjust LIM to be more friendly towards preserving accurate debug information here. */ /* Split critical edges before late uninit warning to reduce the number of false positives from it. */ NEXT_PASS (pass_split_crit_edges); NEXT_PASS (pass_late_warn_uninitialized); NEXT_PASS (pass_uncprop); NEXT_PASS (pass_local_pure_const); POP_INSERT_PASSES () NEXT_PASS (pass_tm_init); PUSH_INSERT_PASSES_WITHIN (pass_tm_init) NEXT_PASS (pass_tm_mark); NEXT_PASS (pass_tm_memopt); NEXT_PASS (pass_tm_edges); POP_INSERT_PASSES () NEXT_PASS (pass_simduid_cleanup); NEXT_PASS (pass_vtable_verify); NEXT_PASS (pass_lower_vaarg); NEXT_PASS (pass_lower_vector); NEXT_PASS (pass_lower_complex_O0); NEXT_PASS (pass_sancov_O0); NEXT_PASS (pass_lower_switch_O0); NEXT_PASS (pass_asan_O0); NEXT_PASS (pass_tsan_O0); NEXT_PASS (pass_sanopt); NEXT_PASS (pass_cleanup_eh); NEXT_PASS (pass_lower_resx); NEXT_PASS (pass_nrv); NEXT_PASS (pass_cleanup_cfg_post_optimizing); NEXT_PASS (pass_warn_function_noreturn); NEXT_PASS (pass_gen_hsail); NEXT_PASS (pass_expand); NEXT_PASS (pass_rest_of_compilation); PUSH_INSERT_PASSES_WITHIN (pass_rest_of_compilation) NEXT_PASS (pass_instantiate_virtual_regs); NEXT_PASS (pass_into_cfg_layout_mode); NEXT_PASS (pass_jump); NEXT_PASS (pass_lower_subreg); NEXT_PASS (pass_df_initialize_opt); NEXT_PASS (pass_cse); NEXT_PASS (pass_rtl_fwprop); NEXT_PASS (pass_rtl_cprop); NEXT_PASS (pass_rtl_pre); NEXT_PASS (pass_rtl_hoist); NEXT_PASS (pass_rtl_cprop); NEXT_PASS (pass_rtl_store_motion); NEXT_PASS (pass_cse_after_global_opts); NEXT_PASS (pass_rtl_ifcvt); NEXT_PASS (pass_reginfo_init); /* Perform loop optimizations. It might be better to do them a bit sooner, but we want the profile feedback to work more efficiently. */ NEXT_PASS (pass_loop2); PUSH_INSERT_PASSES_WITHIN (pass_loop2) NEXT_PASS (pass_rtl_loop_init); NEXT_PASS (pass_rtl_move_loop_invariants); NEXT_PASS (pass_rtl_unroll_loops); NEXT_PASS (pass_rtl_doloop); NEXT_PASS (pass_rtl_loop_done); POP_INSERT_PASSES () NEXT_PASS (pass_lower_subreg2); NEXT_PASS (pass_web); NEXT_PASS (pass_rtl_cprop); NEXT_PASS (pass_cse2); NEXT_PASS (pass_rtl_dse1); NEXT_PASS (pass_rtl_fwprop_addr); NEXT_PASS (pass_inc_dec); NEXT_PASS (pass_initialize_regs); NEXT_PASS (pass_ud_rtl_dce); NEXT_PASS (pass_combine); NEXT_PASS (pass_if_after_combine); NEXT_PASS (pass_jump_after_combine); NEXT_PASS (pass_partition_blocks); NEXT_PASS (pass_outof_cfg_layout_mode); NEXT_PASS (pass_split_all_insns); NEXT_PASS (pass_lower_subreg3); NEXT_PASS (pass_df_initialize_no_opt); NEXT_PASS (pass_stack_ptr_mod); NEXT_PASS (pass_mode_switching); NEXT_PASS (pass_match_asm_constraints); NEXT_PASS (pass_sms); NEXT_PASS (pass_live_range_shrinkage); NEXT_PASS (pass_sched); NEXT_PASS (pass_early_remat); NEXT_PASS (pass_ira); NEXT_PASS (pass_reload); NEXT_PASS (pass_postreload); PUSH_INSERT_PASSES_WITHIN (pass_postreload) NEXT_PASS (pass_postreload_cse); NEXT_PASS (pass_gcse2); NEXT_PASS (pass_split_after_reload); NEXT_PASS (pass_ree); NEXT_PASS (pass_compare_elim_after_reload); NEXT_PASS (pass_thread_prologue_and_epilogue); NEXT_PASS (pass_rtl_dse2); NEXT_PASS (pass_stack_adjustments); NEXT_PASS (pass_jump2); NEXT_PASS (pass_duplicate_computed_gotos); NEXT_PASS (pass_sched_fusion); NEXT_PASS (pass_peephole2); NEXT_PASS (pass_if_after_reload); NEXT_PASS (pass_regrename); NEXT_PASS (pass_cprop_hardreg); NEXT_PASS (pass_fast_rtl_dce); NEXT_PASS (pass_reorder_blocks); NEXT_PASS (pass_leaf_regs); NEXT_PASS (pass_split_before_sched2); NEXT_PASS (pass_sched2); NEXT_PASS (pass_stack_regs); PUSH_INSERT_PASSES_WITHIN (pass_stack_regs) NEXT_PASS (pass_split_before_regstack); NEXT_PASS (pass_stack_regs_run); POP_INSERT_PASSES () POP_INSERT_PASSES () NEXT_PASS (pass_late_compilation); PUSH_INSERT_PASSES_WITHIN (pass_late_compilation) NEXT_PASS (pass_compute_alignments); NEXT_PASS (pass_variable_tracking); NEXT_PASS (pass_free_cfg); NEXT_PASS (pass_machine_reorg); NEXT_PASS (pass_cleanup_barriers); NEXT_PASS (pass_delay_slots); NEXT_PASS (pass_split_for_shorten_branches); NEXT_PASS (pass_convert_to_eh_region_ranges); NEXT_PASS (pass_shorten_branches); NEXT_PASS (pass_set_nothrow_function_flags); NEXT_PASS (pass_dwarf2_frame); NEXT_PASS (pass_final); POP_INSERT_PASSES () NEXT_PASS (pass_df_finish); POP_INSERT_PASSES () NEXT_PASS (pass_clean_state); TERMINATE_PASS_LIST (all_passes)