gcc/passes.def

   1 /* Description of pass structure
   2    Copyright (C) 1987-2015 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   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
   9 version.
  10
  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
  14 for more details.
  15
  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/>.  */
  19
  20 /*
  21  Macros that should be defined when using this file:
  22    INSERT_PASSES_AFTER (PASS)
  23    PUSH_INSERT_PASSES_WITHIN (PASS)
  24    POP_INSERT_PASSES ()
  25    NEXT_PASS (PASS)
  26    TERMINATE_PASS_LIST ()
  27  */
  28
  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
  32     by these passes.  */
  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 ()
  47
  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);
  62   POP_INSERT_PASSES ()
  63
  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);
  69   POP_INSERT_PASSES ()
  70
  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);
  82           NEXT_PASS (pass_ccp);
  83           /* After CCP we rewrite no longer addressed locals into SSA
  84              form if possible.  */
  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);
  90           NEXT_PASS (pass_fre);
  91           NEXT_PASS (pass_merge_phi);
  92           NEXT_PASS (pass_dse);
  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
 102               late.  */
 103           NEXT_PASS (pass_split_functions);
 104       POP_INSERT_PASSES ()
 105       NEXT_PASS (pass_release_ssa_names);
 106       NEXT_PASS (pass_rebuild_cgraph_edges);
 107       NEXT_PASS (pass_inline_parameters);
 108   POP_INSERT_PASSES ()
 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);
 115   POP_INSERT_PASSES ()
 116   NEXT_PASS (pass_ipa_increase_alignment);
 117   NEXT_PASS (pass_ipa_tm);
 118   NEXT_PASS (pass_ipa_lower_emutls);
 119   TERMINATE_PASS_LIST ()
 120
 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 ()
 138
 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
 141      compiled unit.  */
 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 ()
 146
 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
 161          form if possible.  */
 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);
 183       NEXT_PASS (pass_ch);
 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.
 196
 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
 204          opportunities.  */
 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
 213          form if possible.  */
 214       NEXT_PASS (pass_cse_sincos);
 215       NEXT_PASS (pass_optimize_bswap);
 216       NEXT_PASS (pass_laddress);
 217       NEXT_PASS (pass_split_crit_edges);
 218       NEXT_PASS (pass_pre);
 219       NEXT_PASS (pass_sink_code);
 220       NEXT_PASS (pass_asan);
 221       NEXT_PASS (pass_tsan);
 222       /* Pass group that runs when 1) enabled, 2) there are loops
 223          in the function.  Make sure to run pass_fix_loops before
 224          to discover/remove loops before running the gate function
 225          of pass_tree_loop.  */
 226       NEXT_PASS (pass_fix_loops);
 227       NEXT_PASS (pass_tree_loop);
 228       PUSH_INSERT_PASSES_WITHIN (pass_tree_loop)
 229           NEXT_PASS (pass_tree_loop_init);
 230           NEXT_PASS (pass_lim);
 231           NEXT_PASS (pass_copy_prop);
 232           NEXT_PASS (pass_dce);
 233           NEXT_PASS (pass_tree_unswitch);
 234           NEXT_PASS (pass_scev_cprop);
 235           NEXT_PASS (pass_record_bounds);
 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);
 244           POP_INSERT_PASSES ()
 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);
 249           POP_INSERT_PASSES ()
 250           NEXT_PASS (pass_ch_vect);
 251           NEXT_PASS (pass_if_conversion);
 252           /* pass_vectorize must immediately follow pass_if_conversion.
 253              Please do not add any other passes in between.  */
 254           NEXT_PASS (pass_vectorize);
 255           PUSH_INSERT_PASSES_WITHIN (pass_vectorize)
 256               NEXT_PASS (pass_dce);
 257           POP_INSERT_PASSES ()
 258           NEXT_PASS (pass_predcom);
 259           NEXT_PASS (pass_complete_unroll);
 260           NEXT_PASS (pass_slp_vectorize);
 261           NEXT_PASS (pass_loop_prefetch);
 262           /* Run IVOPTs after the last pass that uses data-reference analysis
 263              as that doesn't handle TARGET_MEM_REFs.  */
 264           NEXT_PASS (pass_iv_optimize);
 265           NEXT_PASS (pass_lim);
 266           NEXT_PASS (pass_tree_loop_done);
 267       POP_INSERT_PASSES ()
 268       /* Pass group that runs when pass_tree_loop is disabled or there
 269          are no loops in the function.  */
 270       NEXT_PASS (pass_tree_no_loop);
 271       PUSH_INSERT_PASSES_WITHIN (pass_tree_no_loop)
 272           NEXT_PASS (pass_slp_vectorize);
 273       POP_INSERT_PASSES ()
 274       NEXT_PASS (pass_simduid_cleanup);
 275       NEXT_PASS (pass_lower_vector_ssa);
 276       NEXT_PASS (pass_cse_reciprocals);
 277       NEXT_PASS (pass_reassoc);
 278       NEXT_PASS (pass_strength_reduction);
 279       NEXT_PASS (pass_tracer);
 280       NEXT_PASS (pass_dominator);
 281       NEXT_PASS (pass_strlen);
 282       NEXT_PASS (pass_vrp);
 283       /* The only const/copy propagation opportunities left after
 284          DOM and VRP should be due to degenerate PHI nodes.  So rather than
 285          run the full propagators, run a specialized pass which
 286          only examines PHIs to discover const/copy propagation
 287          opportunities.  */
 288       NEXT_PASS (pass_phi_only_cprop);
 289       NEXT_PASS (pass_cd_dce);
 290       NEXT_PASS (pass_dse);
 291       NEXT_PASS (pass_forwprop);
 292       NEXT_PASS (pass_phiopt);
 293       NEXT_PASS (pass_fold_builtins);
 294       NEXT_PASS (pass_optimize_widening_mul);
 295       NEXT_PASS (pass_tail_calls);
 296       NEXT_PASS (pass_rename_ssa_copies);
 297       /* FIXME: If DCE is not run before checking for uninitialized uses,
 298          we may get false warnings (e.g., testsuite/gcc.dg/uninit-5.c).
 299          However, this also causes us to misdiagnose cases that should be
 300          real warnings (e.g., testsuite/gcc.dg/pr18501.c).
 301
 302          To fix the false positives in uninit-5.c, we would have to
 303          account for the predicates protecting the set and the use of each
 304          variable.  Using a representation like Gated Single Assignment
 305          may help.  */
 306       /* Split critical edges before late uninit warning to reduce the
 307          number of false positives from it.  */
 308       NEXT_PASS (pass_split_crit_edges);
 309       NEXT_PASS (pass_late_warn_uninitialized);
 310       NEXT_PASS (pass_uncprop);
 311       NEXT_PASS (pass_local_pure_const);
 312   POP_INSERT_PASSES ()
 313   NEXT_PASS (pass_all_optimizations_g);
 314   PUSH_INSERT_PASSES_WITHIN (pass_all_optimizations_g)
 315       NEXT_PASS (pass_remove_cgraph_callee_edges);
 316       NEXT_PASS (pass_strip_predict_hints);
 317       /* Lower remaining pieces of GIMPLE.  */
 318       NEXT_PASS (pass_lower_complex);
 319       NEXT_PASS (pass_lower_vector_ssa);
 320       /* Perform simple scalar cleanup which is constant/copy propagation.  */
 321       NEXT_PASS (pass_ccp);
 322       NEXT_PASS (pass_object_sizes);
 323       /* Fold remaining builtins.  */
 324       NEXT_PASS (pass_fold_builtins);
 325       /* Copy propagation also copy-propagates constants, this is necessary
 326          to forward object-size and builtin folding results properly.  */
 327       NEXT_PASS (pass_copy_prop);
 328       NEXT_PASS (pass_dce);
 329       NEXT_PASS (pass_asan);
 330       NEXT_PASS (pass_tsan);
 331       NEXT_PASS (pass_rename_ssa_copies);
 332       /* ???  We do want some kind of loop invariant motion, but we possibly
 333          need to adjust LIM to be more friendly towards preserving accurate
 334          debug information here.  */
 335       /* Split critical edges before late uninit warning to reduce the
 336          number of false positives from it.  */
 337       NEXT_PASS (pass_split_crit_edges);
 338       NEXT_PASS (pass_late_warn_uninitialized);
 339       NEXT_PASS (pass_uncprop);
 340       NEXT_PASS (pass_local_pure_const);
 341   POP_INSERT_PASSES ()
 342   NEXT_PASS (pass_tm_init);
 343   PUSH_INSERT_PASSES_WITHIN (pass_tm_init)
 344       NEXT_PASS (pass_tm_mark);
 345       NEXT_PASS (pass_tm_memopt);
 346       NEXT_PASS (pass_tm_edges);
 347   POP_INSERT_PASSES ()
 348   NEXT_PASS (pass_vtable_verify);
 349   NEXT_PASS (pass_lower_vaarg);
 350   NEXT_PASS (pass_lower_vector);
 351   NEXT_PASS (pass_lower_complex_O0);
 352   NEXT_PASS (pass_asan_O0);
 353   NEXT_PASS (pass_tsan_O0);
 354   NEXT_PASS (pass_sanopt);
 355   NEXT_PASS (pass_cleanup_eh);
 356   NEXT_PASS (pass_lower_resx);
 357   NEXT_PASS (pass_nrv);
 358   NEXT_PASS (pass_cleanup_cfg_post_optimizing);
 359   NEXT_PASS (pass_warn_function_noreturn);
 360
 361   NEXT_PASS (pass_expand);
 362
 363   NEXT_PASS (pass_rest_of_compilation);
 364   PUSH_INSERT_PASSES_WITHIN (pass_rest_of_compilation)
 365       NEXT_PASS (pass_instantiate_virtual_regs);
 366       NEXT_PASS (pass_into_cfg_layout_mode);
 367       NEXT_PASS (pass_jump);
 368       NEXT_PASS (pass_lower_subreg);
 369       NEXT_PASS (pass_df_initialize_opt);
 370       NEXT_PASS (pass_cse);
 371       NEXT_PASS (pass_rtl_fwprop);
 372       NEXT_PASS (pass_rtl_cprop);
 373       NEXT_PASS (pass_rtl_pre);
 374       NEXT_PASS (pass_rtl_hoist);
 375       NEXT_PASS (pass_rtl_cprop);
 376       NEXT_PASS (pass_rtl_store_motion);
 377       NEXT_PASS (pass_cse_after_global_opts);
 378       NEXT_PASS (pass_rtl_ifcvt);
 379       NEXT_PASS (pass_reginfo_init);
 380       /* Perform loop optimizations.  It might be better to do them a bit
 381          sooner, but we want the profile feedback to work more
 382          efficiently.  */
 383       NEXT_PASS (pass_loop2);
 384       PUSH_INSERT_PASSES_WITHIN (pass_loop2)
 385           NEXT_PASS (pass_rtl_loop_init);
 386           NEXT_PASS (pass_rtl_move_loop_invariants);
 387           NEXT_PASS (pass_rtl_unroll_loops);
 388           NEXT_PASS (pass_rtl_doloop);
 389           NEXT_PASS (pass_rtl_loop_done);
 390           TERMINATE_PASS_LIST ()
 391       POP_INSERT_PASSES ()
 392       NEXT_PASS (pass_web);
 393       NEXT_PASS (pass_rtl_cprop);
 394       NEXT_PASS (pass_cse2);
 395       NEXT_PASS (pass_rtl_dse1);
 396       NEXT_PASS (pass_rtl_fwprop_addr);
 397       NEXT_PASS (pass_inc_dec);
 398       NEXT_PASS (pass_initialize_regs);
 399       NEXT_PASS (pass_ud_rtl_dce);
 400       NEXT_PASS (pass_combine);
 401       NEXT_PASS (pass_if_after_combine);
 402       NEXT_PASS (pass_partition_blocks);
 403       NEXT_PASS (pass_outof_cfg_layout_mode);
 404       NEXT_PASS (pass_split_all_insns);
 405       NEXT_PASS (pass_lower_subreg2);
 406       NEXT_PASS (pass_df_initialize_no_opt);
 407       NEXT_PASS (pass_stack_ptr_mod);
 408       NEXT_PASS (pass_mode_switching);
 409       NEXT_PASS (pass_match_asm_constraints);
 410       NEXT_PASS (pass_sms);
 411       NEXT_PASS (pass_live_range_shrinkage);
 412       NEXT_PASS (pass_sched);
 413       NEXT_PASS (pass_ira);
 414       NEXT_PASS (pass_reload);
 415       NEXT_PASS (pass_postreload);
 416       PUSH_INSERT_PASSES_WITHIN (pass_postreload)
 417           NEXT_PASS (pass_postreload_cse);
 418           NEXT_PASS (pass_gcse2);
 419           NEXT_PASS (pass_split_after_reload);
 420           NEXT_PASS (pass_ree);
 421           NEXT_PASS (pass_compare_elim_after_reload);
 422           NEXT_PASS (pass_branch_target_load_optimize1);
 423           NEXT_PASS (pass_thread_prologue_and_epilogue);
 424           NEXT_PASS (pass_rtl_dse2);
 425           NEXT_PASS (pass_stack_adjustments);
 426           NEXT_PASS (pass_jump2);
 427           NEXT_PASS (pass_duplicate_computed_gotos);
 428           NEXT_PASS (pass_sched_fusion);
 429           NEXT_PASS (pass_peephole2);
 430           NEXT_PASS (pass_if_after_reload);
 431           NEXT_PASS (pass_regrename);
 432           NEXT_PASS (pass_cprop_hardreg);
 433           NEXT_PASS (pass_fast_rtl_dce);
 434           NEXT_PASS (pass_reorder_blocks);
 435           NEXT_PASS (pass_branch_target_load_optimize2);
 436           NEXT_PASS (pass_leaf_regs);
 437           NEXT_PASS (pass_split_before_sched2);
 438           NEXT_PASS (pass_sched2);
 439           NEXT_PASS (pass_stack_regs);
 440           PUSH_INSERT_PASSES_WITHIN (pass_stack_regs)
 441               NEXT_PASS (pass_split_before_regstack);
 442               NEXT_PASS (pass_stack_regs_run);
 443           POP_INSERT_PASSES ()
 444       POP_INSERT_PASSES ()
 445       NEXT_PASS (pass_late_compilation);
 446       PUSH_INSERT_PASSES_WITHIN (pass_late_compilation)
 447           NEXT_PASS (pass_compute_alignments);
 448           NEXT_PASS (pass_variable_tracking);
 449           NEXT_PASS (pass_free_cfg);
 450           NEXT_PASS (pass_machine_reorg);
 451           NEXT_PASS (pass_cleanup_barriers);
 452           NEXT_PASS (pass_delay_slots);
 453           NEXT_PASS (pass_split_for_shorten_branches);
 454           NEXT_PASS (pass_convert_to_eh_region_ranges);
 455           NEXT_PASS (pass_shorten_branches);
 456           NEXT_PASS (pass_set_nothrow_function_flags);
 457           NEXT_PASS (pass_dwarf2_frame);
 458           NEXT_PASS (pass_final);
 459       POP_INSERT_PASSES ()
 460       NEXT_PASS (pass_df_finish);
 461   POP_INSERT_PASSES ()
 462   NEXT_PASS (pass_clean_state);
 463   TERMINATE_PASS_LIST ()