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*参照元 [#uf594009] #backlinks *説明 [#j54ee3b3] -パス: [[gcc-8.3/gcc/passes.c]] -FIXME: これは何？ --説明 **引数 [#z5bea542] -opt_pass *pass -- --[[gcc-8.3/gcc/opt_pass]] **返り値 [#bcda9de2] -bool -- **参考 [#a2f867b5] *実装 [#xbdf33d0] /* Execute PASS. */ bool execute_one_pass (opt_pass *pass) { unsigned int todo_after = 0; bool gate_status; /* IPA passes are executed on whole program, so cfun should be NULL. Other passes need function context set. */ if (pass->type == SIMPLE_IPA_PASS || pass->type == IPA_PASS) gcc_assert (!cfun && !current_function_decl); else gcc_assert (cfun && current_function_decl); - --[[gcc-8.3/gcc/gcc_assert()]] current_pass = pass; /* Check whether gate check should be avoided. User controls the value of the gate through the parameter "gate_status". */ gate_status = pass->gate (cfun); gate_status = override_gate_status (pass, current_function_decl, gate_status); - --[[gcc-8.3/gcc/opt_pass/gate()]] --[[gcc-8.3/gcc/override_gate_status()]] /* Override gate with plugin. */ invoke_plugin_callbacks (PLUGIN_OVERRIDE_GATE, &gate_status); - --[[gcc-8.3/gcc/invoke_plugin_callbacks()]] if (!gate_status) { /* Run so passes selectively disabling themselves on a given function are not miscounted. */ if (profile_report && cfun && (cfun->curr_properties & PROP_cfg)) { check_profile_consistency (pass->static_pass_number, 0, false); check_profile_consistency (pass->static_pass_number, 1, false); } current_pass = NULL; return false; } - --[[gcc-8.3/gcc/check_profile_consistency()]] if (should_skip_pass_p (pass)) { skip_pass (pass); return true; } - --[[gcc-8.3/gcc/should_skip_pass_p()]] --[[gcc-8.3/gcc/skip_pass()]] /* Pass execution event trigger: useful to identify passes being executed. */ invoke_plugin_callbacks (PLUGIN_PASS_EXECUTION, pass); if (!quiet_flag && !cfun) fprintf (stderr, " <%s>", pass->name ? pass->name : ""); /* Note that the folders should only create gimple expressions. This is a hack until the new folder is ready. */ in_gimple_form = (cfun && (cfun->curr_properties & PROP_trees)) != 0; pass_init_dump_file (pass); - --[[gcc-8.3/gcc/pass_init_dump_file()]] /* If a timevar is present, start it. */ if (pass->tv_id != TV_NONE) timevar_push (pass->tv_id); - --[[gcc-8.3/gcc/timevar_push()]] /* Run pre-pass verification. */ execute_todo (pass->todo_flags_start); - --[[gcc-8.3/gcc/execute_todo()]] if (flag_checking) do_per_function (verify_curr_properties, (void *)(size_t)pass->properties_required); - --[[gcc-8.3/gcc/do_per_function()]] /* Do it! */ todo_after = pass->execute (cfun); - --パスの本体部分 --[[gcc-8.3/gcc/opt_pass/execute()]] --[[gcc-8.3/gcc/tips__pass]] if (todo_after & TODO_discard_function) { /* Stop timevar. */ if (pass->tv_id != TV_NONE) timevar_pop (pass->tv_id); pass_fini_dump_file (pass); - --[[gcc-8.3/gcc/timevar_pop()]] --[[gcc-8.3/gcc/pass_fini_dump_file()]] gcc_assert (cfun); /* As cgraph_node::release_body expects release dominators info, we have to release it. */ if (dom_info_available_p (CDI_DOMINATORS)) free_dominance_info (CDI_DOMINATORS); if (dom_info_available_p (CDI_POST_DOMINATORS)) free_dominance_info (CDI_POST_DOMINATORS); - --[[gcc-8.3/gcc/free_dominance_info()]] tree fn = cfun->decl; pop_cfun (); gcc_assert (!cfun); cgraph_node::get (fn)->release_body (); - --[[gcc-8.3/gcc/pop_cfun()]] --[[gcc-8.3/gcc/cgraph_node]] --[[gcc-8.3/gcc/cgraph_node/get()]] --[[gcc-8.3/gcc/cgraph_node/release_body()]] current_pass = NULL; redirect_edge_var_map_empty (); ggc_collect (); - --[[gcc-8.3/gcc/redirect_edge_var_map_empty()]] --[[gcc-8.3/gcc/ggc_collect()]] return true; } do_per_function (clear_last_verified, NULL); do_per_function (update_properties_after_pass, pass); - --[[gcc-8.3/gcc/do_per_function()]] if (profile_report && cfun && (cfun->curr_properties & PROP_cfg)) check_profile_consistency (pass->static_pass_number, 0, true); /* Run post-pass cleanup and verification. */ execute_todo (todo_after | pass->todo_flags_finish | TODO_verify_il); if (profile_report && cfun && (cfun->curr_properties & PROP_cfg)) check_profile_consistency (pass->static_pass_number, 1, true); verify_interpass_invariants (); - --[[gcc-8.3/gcc/verify_interpass_invariants()]] /* Stop timevar. */ if (pass->tv_id != TV_NONE) timevar_pop (pass->tv_id); if (pass->type == IPA_PASS && ((ipa_opt_pass_d *)pass)->function_transform) { struct cgraph_node *node; FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) node->ipa_transforms_to_apply.safe_push ((ipa_opt_pass_d *)pass); } else if (dump_file) do_per_function (execute_function_dump, pass); - --[[gcc-8.3/gcc/ipa_opt_pass_d/function_transform()]] if (!current_function_decl) symtab->process_new_functions (); - --symtab は struct symbol_table *型 ---[[gcc-8.3/gcc/symbol_table]] --[[gcc-8.3/gcc/symtab(global)]] --[[gcc-8.3/gcc/symbol_table/process_new_functions()]] pass_fini_dump_file (pass); if (pass->type != SIMPLE_IPA_PASS && pass->type != IPA_PASS) gcc_assert (!(cfun->curr_properties & PROP_trees) || pass->type != RTL_PASS); current_pass = NULL; redirect_edge_var_map_empty (); - --[[gcc-8.3/gcc/redirect_edge_var_map_empty()]] /* Signal this is a suitable GC collection point. */ if (!((todo_after | pass->todo_flags_finish) & TODO_do_not_ggc_collect)) ggc_collect (); return true; } *コメント [#fdce3d33]
