gcc/tree-pass.h

   1 /* Definitions for describing one tree-ssa optimization pass.
   2    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
   3    Free Software Foundation, Inc.
   4    Contributed by Richard Henderson <rth@redhat.com>
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22
  23 #ifndef GCC_TREE_PASS_H
  24 #define GCC_TREE_PASS_H 1
  25
  26 #include "timevar.h"
  27 #include "dumpfile.h"
  28
  29 /* Optimization pass type.  */
  30 enum opt_pass_type
  31 {
  32   GIMPLE_PASS,
  33   RTL_PASS,
  34   SIMPLE_IPA_PASS,
  35   IPA_PASS
  36 };
  37
  38 /* Describe one pass; this is the common part shared across different pass
  39    types.  */
  40 struct opt_pass
  41 {
  42   /* Optimization pass type.  */
  43   enum opt_pass_type type;
  44
  45   /* Terse name of the pass used as a fragment of the dump file
  46      name.  If the name starts with a star, no dump happens. */
  47   const char *name;
  48
  49   /* If non-null, this pass and all sub-passes are executed only if
  50      the function returns true.  */
  51   bool (*gate) (void);
  52
  53   /* This is the code to run.  If null, then there should be sub-passes
  54      otherwise this pass does nothing.  The return value contains
  55      TODOs to execute in addition to those in TODO_flags_finish.   */
  56   unsigned int (*execute) (void);
  57
  58   /* A list of sub-passes to run, dependent on gate predicate.  */
  59   struct opt_pass *sub;
  60
  61   /* Next in the list of passes to run, independent of gate predicate.  */
  62   struct opt_pass *next;
  63
  64   /* Static pass number, used as a fragment of the dump file name.  */
  65   int static_pass_number;
  66
  67   /* The timevar id associated with this pass.  */
  68   /* ??? Ideally would be dynamically assigned.  */
  69   timevar_id_t tv_id;
  70
  71   /* Sets of properties input and output from this pass.  */
  72   unsigned int properties_required;
  73   unsigned int properties_provided;
  74   unsigned int properties_destroyed;
  75
  76   /* Flags indicating common sets things to do before and after.  */
  77   unsigned int todo_flags_start;
  78   unsigned int todo_flags_finish;
  79 };
  80
  81 /* Description of GIMPLE pass.  */
  82 struct gimple_opt_pass
  83 {
  84   struct opt_pass pass;
  85 };
  86
  87 /* Description of RTL pass.  */
  88 struct rtl_opt_pass
  89 {
  90   struct opt_pass pass;
  91 };
  92
  93 struct varpool_node;
  94 struct cgraph_node;
  95 struct cgraph_node_set_def;
  96 struct varpool_node_set_def;
  97
  98 /* Description of IPA pass with generate summary, write, execute, read and
  99    transform stages.  */
 100 struct ipa_opt_pass_d
 101 {
 102   struct opt_pass pass;
 103
 104   /* IPA passes can analyze function body and variable initializers
 105       using this hook and produce summary.  */
 106   void (*generate_summary) (void);
 107
 108   /* This hook is used to serialize IPA summaries on disk.  */
 109   void (*write_summary) (void);
 110
 111   /* This hook is used to deserialize IPA summaries from disk.  */
 112   void (*read_summary) (void);
 113
 114   /* This hook is used to serialize IPA optimization summaries on disk.  */
 115   void (*write_optimization_summary) (void);
 116
 117   /* This hook is used to deserialize IPA summaries from disk.  */
 118   void (*read_optimization_summary) (void);
 119
 120   /* Hook to convert gimple stmt uids into true gimple statements.  The second
 121      parameter is an array of statements indexed by their uid. */
 122   void (*stmt_fixup) (struct cgraph_node *, gimple *);
 123
 124   /* Results of interprocedural propagation of an IPA pass is applied to
 125      function body via this hook.  */
 126   unsigned int function_transform_todo_flags_start;
 127   unsigned int (*function_transform) (struct cgraph_node *);
 128   void (*variable_transform) (struct varpool_node *);
 129 };
 130
 131 /* Description of simple IPA pass.  Simple IPA passes have just one execute
 132    hook.  */
 133 struct simple_ipa_opt_pass
 134 {
 135   struct opt_pass pass;
 136 };
 137
 138 /* Pass properties.  */
 139 #define PROP_gimple_any         (1 << 0)        /* entire gimple grammar */
 140 #define PROP_gimple_lcf         (1 << 1)        /* lowered control flow */
 141 #define PROP_gimple_leh         (1 << 2)        /* lowered eh */
 142 #define PROP_cfg                (1 << 3)
 143 #define PROP_ssa                (1 << 5)
 144 #define PROP_no_crit_edges      (1 << 6)
 145 #define PROP_rtl                (1 << 7)
 146 #define PROP_gimple_lomp        (1 << 8)        /* lowered OpenMP directives */
 147 #define PROP_cfglayout          (1 << 9)        /* cfglayout mode on RTL */
 148 #define PROP_gimple_lcx         (1 << 10)       /* lowered complex */
 149 #define PROP_loops              (1 << 11)       /* preserve loop structures */
 150
 151 #define PROP_trees \
 152   (PROP_gimple_any | PROP_gimple_lcf | PROP_gimple_leh | PROP_gimple_lomp)
 153
 154 /* To-do flags.  */
 155 #define TODO_ggc_collect                (1 << 1)
 156 #define TODO_verify_ssa                 (1 << 2)
 157 #define TODO_verify_flow                (1 << 3)
 158 #define TODO_verify_stmts               (1 << 4)
 159 #define TODO_cleanup_cfg                (1 << 5)
 160 #define TODO_dump_symtab                (1 << 7)
 161 #define TODO_remove_functions           (1 << 8)
 162 #define TODO_rebuild_frequencies        (1 << 9)
 163 #define TODO_verify_rtl_sharing         (1 << 10)
 164
 165 /* To-do flags for calls to update_ssa.  */
 166
 167 /* Update the SSA form inserting PHI nodes for newly exposed symbols
 168    and virtual names marked for updating.  When updating real names,
 169    only insert PHI nodes for a real name O_j in blocks reached by all
 170    the new and old definitions for O_j.  If the iterated dominance
 171    frontier for O_j is not pruned, we may end up inserting PHI nodes
 172    in blocks that have one or more edges with no incoming definition
 173    for O_j.  This would lead to uninitialized warnings for O_j's
 174    symbol.  */
 175 #define TODO_update_ssa                 (1 << 11)
 176
 177 /* Update the SSA form without inserting any new PHI nodes at all.
 178    This is used by passes that have either inserted all the PHI nodes
 179    themselves or passes that need only to patch use-def and def-def
 180    chains for virtuals (e.g., DCE).  */
 181 #define TODO_update_ssa_no_phi          (1 << 12)
 182
 183 /* Insert PHI nodes everywhere they are needed.  No pruning of the
 184    IDF is done.  This is used by passes that need the PHI nodes for
 185    O_j even if it means that some arguments will come from the default
 186    definition of O_j's symbol.
 187
 188    WARNING: If you need to use this flag, chances are that your pass
 189    may be doing something wrong.  Inserting PHI nodes for an old name
 190    where not all edges carry a new replacement may lead to silent
 191    codegen errors or spurious uninitialized warnings.  */
 192 #define TODO_update_ssa_full_phi        (1 << 13)
 193
 194 /* Passes that update the SSA form on their own may want to delegate
 195    the updating of virtual names to the generic updater.  Since FUD
 196    chains are easier to maintain, this simplifies the work they need
 197    to do.  NOTE: If this flag is used, any OLD->NEW mappings for real
 198    names are explicitly destroyed and only the symbols marked for
 199    renaming are processed.  */
 200 #define TODO_update_ssa_only_virtuals   (1 << 14)
 201
 202 /* Some passes leave unused local variables that can be removed from
 203    cfun->local_decls.  This reduces the size of dump files
 204    and the memory footprint for VAR_DECLs.  */
 205 #define TODO_remove_unused_locals       (1 << 15)
 206
 207 /* Call df_finish at the end of the pass.  This is done after all of
 208    the dumpers have been allowed to run so that they have access to
 209    the instance before it is destroyed.  */
 210 #define TODO_df_finish                  (1 << 17)
 211
 212 /* Call df_verify at the end of the pass if checking is enabled.  */
 213 #define TODO_df_verify                  (1 << 18)
 214
 215 /* Internally used for the first instance of a pass.  */
 216 #define TODO_mark_first_instance        (1 << 19)
 217
 218 /* Rebuild aliasing info.  */
 219 #define TODO_rebuild_alias              (1 << 20)
 220
 221 /* Rebuild the addressable-vars bitmap and do register promotion.  */
 222 #define TODO_update_address_taken       (1 << 21)
 223
 224 /* Rebuild the callgraph edges.  */
 225 #define TODO_rebuild_cgraph_edges       (1 << 22)
 226
 227 /* Internally used in execute_function_todo().  */
 228 #define TODO_update_ssa_any             \
 229     (TODO_update_ssa                    \
 230      | TODO_update_ssa_no_phi           \
 231      | TODO_update_ssa_full_phi         \
 232      | TODO_update_ssa_only_virtuals)
 233
 234 #define TODO_verify_all \
 235   (TODO_verify_ssa | TODO_verify_flow | TODO_verify_stmts)
 236
 237
 238 /* Register pass info. */
 239
 240 enum pass_positioning_ops
 241 {
 242   PASS_POS_INSERT_AFTER,  /* Insert after the reference pass.  */
 243   PASS_POS_INSERT_BEFORE, /* Insert before the reference pass.  */
 244   PASS_POS_REPLACE        /* Replace the reference pass.  */
 245 };
 246
 247 struct register_pass_info
 248 {
 249   struct opt_pass *pass;            /* New pass to register.  */
 250   const char *reference_pass_name;  /* Name of the reference pass for hooking
 251                                        up the new pass.  */
 252   int ref_pass_instance_number;     /* Insert the pass at the specified
 253                                        instance number of the reference pass.
 254                                        Do it for every instance if it is 0.  */
 255   enum pass_positioning_ops pos_op; /* how to insert the new pass.  */
 256 };
 257
 258 extern struct gimple_opt_pass pass_mudflap_1;
 259 extern struct gimple_opt_pass pass_mudflap_2;
 260 extern struct gimple_opt_pass pass_lower_cf;
 261 extern struct gimple_opt_pass pass_refactor_eh;
 262 extern struct gimple_opt_pass pass_lower_eh;
 263 extern struct gimple_opt_pass pass_lower_eh_dispatch;
 264 extern struct gimple_opt_pass pass_lower_resx;
 265 extern struct gimple_opt_pass pass_build_cfg;
 266 extern struct gimple_opt_pass pass_early_tree_profile;
 267 extern struct gimple_opt_pass pass_cleanup_eh;
 268 extern struct gimple_opt_pass pass_sra;
 269 extern struct gimple_opt_pass pass_sra_early;
 270 extern struct gimple_opt_pass pass_early_ipa_sra;
 271 extern struct gimple_opt_pass pass_tail_recursion;
 272 extern struct gimple_opt_pass pass_tail_calls;
 273 extern struct gimple_opt_pass pass_tree_loop;
 274 extern struct gimple_opt_pass pass_tree_loop_init;
 275 extern struct gimple_opt_pass pass_lim;
 276 extern struct gimple_opt_pass pass_tree_unswitch;
 277 extern struct gimple_opt_pass pass_predcom;
 278 extern struct gimple_opt_pass pass_iv_canon;
 279 extern struct gimple_opt_pass pass_scev_cprop;
 280 extern struct gimple_opt_pass pass_empty_loop;
 281 extern struct gimple_opt_pass pass_record_bounds;
 282 extern struct gimple_opt_pass pass_graphite;
 283 extern struct gimple_opt_pass pass_graphite_transforms;
 284 extern struct gimple_opt_pass pass_if_conversion;
 285 extern struct gimple_opt_pass pass_loop_distribution;
 286 extern struct gimple_opt_pass pass_vectorize;
 287 extern struct gimple_opt_pass pass_slp_vectorize;
 288 extern struct gimple_opt_pass pass_complete_unroll;
 289 extern struct gimple_opt_pass pass_complete_unrolli;
 290 extern struct gimple_opt_pass pass_parallelize_loops;
 291 extern struct gimple_opt_pass pass_loop_prefetch;
 292 extern struct gimple_opt_pass pass_iv_optimize;
 293 extern struct gimple_opt_pass pass_tree_loop_done;
 294 extern struct gimple_opt_pass pass_ch;
 295 extern struct gimple_opt_pass pass_ccp;
 296 extern struct gimple_opt_pass pass_phi_only_cprop;
 297 extern struct gimple_opt_pass pass_build_ssa;
 298 extern struct gimple_opt_pass pass_build_alias;
 299 extern struct gimple_opt_pass pass_build_ealias;
 300 extern struct gimple_opt_pass pass_dominator;
 301 extern struct gimple_opt_pass pass_dce;
 302 extern struct gimple_opt_pass pass_dce_loop;
 303 extern struct gimple_opt_pass pass_cd_dce;
 304 extern struct gimple_opt_pass pass_call_cdce;
 305 extern struct gimple_opt_pass pass_merge_phi;
 306 extern struct gimple_opt_pass pass_split_crit_edges;
 307 extern struct gimple_opt_pass pass_pre;
 308 extern unsigned int tail_merge_optimize (unsigned int);
 309 extern struct gimple_opt_pass pass_profile;
 310 extern struct gimple_opt_pass pass_strip_predict_hints;
 311 extern struct gimple_opt_pass pass_lower_complex_O0;
 312 extern struct gimple_opt_pass pass_lower_complex;
 313 extern struct gimple_opt_pass pass_lower_vector;
 314 extern struct gimple_opt_pass pass_lower_vector_ssa;
 315 extern struct gimple_opt_pass pass_lower_omp;
 316 extern struct gimple_opt_pass pass_diagnose_omp_blocks;
 317 extern struct gimple_opt_pass pass_expand_omp;
 318 extern struct gimple_opt_pass pass_expand_omp_ssa;
 319 extern struct gimple_opt_pass pass_object_sizes;
 320 extern struct gimple_opt_pass pass_strlen;
 321 extern struct gimple_opt_pass pass_fold_builtins;
 322 extern struct gimple_opt_pass pass_stdarg;
 323 extern struct gimple_opt_pass pass_early_warn_uninitialized;
 324 extern struct gimple_opt_pass pass_late_warn_uninitialized;
 325 extern struct gimple_opt_pass pass_cse_reciprocals;
 326 extern struct gimple_opt_pass pass_cse_sincos;
 327 extern struct gimple_opt_pass pass_optimize_bswap;
 328 extern struct gimple_opt_pass pass_optimize_widening_mul;
 329 extern struct gimple_opt_pass pass_warn_function_return;
 330 extern struct gimple_opt_pass pass_warn_function_noreturn;
 331 extern struct gimple_opt_pass pass_cselim;
 332 extern struct gimple_opt_pass pass_phiopt;
 333 extern struct gimple_opt_pass pass_forwprop;
 334 extern struct gimple_opt_pass pass_phiprop;
 335 extern struct gimple_opt_pass pass_tree_ifcombine;
 336 extern struct gimple_opt_pass pass_dse;
 337 extern struct gimple_opt_pass pass_nrv;
 338 extern struct gimple_opt_pass pass_rename_ssa_copies;
 339 extern struct gimple_opt_pass pass_sink_code;
 340 extern struct gimple_opt_pass pass_fre;
 341 extern struct gimple_opt_pass pass_check_data_deps;
 342 extern struct gimple_opt_pass pass_copy_prop;
 343 extern struct gimple_opt_pass pass_vrp;
 344 extern struct gimple_opt_pass pass_uncprop;
 345 extern struct gimple_opt_pass pass_return_slot;
 346 extern struct gimple_opt_pass pass_reassoc;
 347 extern struct gimple_opt_pass pass_rebuild_cgraph_edges;
 348 extern struct gimple_opt_pass pass_remove_cgraph_callee_edges;
 349 extern struct gimple_opt_pass pass_build_cgraph_edges;
 350 extern struct gimple_opt_pass pass_local_pure_const;
 351 extern struct gimple_opt_pass pass_tracer;
 352 extern struct gimple_opt_pass pass_warn_unused_result;
 353 extern struct gimple_opt_pass pass_diagnose_tm_blocks;
 354 extern struct gimple_opt_pass pass_lower_tm;
 355 extern struct gimple_opt_pass pass_tm_init;
 356 extern struct gimple_opt_pass pass_tm_mark;
 357 extern struct gimple_opt_pass pass_tm_memopt;
 358 extern struct gimple_opt_pass pass_tm_edges;
 359 extern struct gimple_opt_pass pass_split_functions;
 360 extern struct gimple_opt_pass pass_feedback_split_functions;
 361 extern struct gimple_opt_pass pass_strength_reduction;
 362
 363 /* IPA Passes */
 364 extern struct simple_ipa_opt_pass pass_ipa_lower_emutls;
 365 extern struct simple_ipa_opt_pass pass_ipa_function_and_variable_visibility;
 366 extern struct simple_ipa_opt_pass pass_ipa_tree_profile;
 367
 368 extern struct simple_ipa_opt_pass pass_early_local_passes;
 369
 370 extern struct ipa_opt_pass_d pass_ipa_whole_program_visibility;
 371 extern struct ipa_opt_pass_d pass_ipa_lto_gimple_out;
 372 extern struct simple_ipa_opt_pass pass_ipa_increase_alignment;
 373 extern struct ipa_opt_pass_d pass_ipa_inline;
 374 extern struct simple_ipa_opt_pass pass_ipa_free_lang_data;
 375 extern struct simple_ipa_opt_pass pass_ipa_free_inline_summary;
 376 extern struct ipa_opt_pass_d pass_ipa_cp;
 377 extern struct ipa_opt_pass_d pass_ipa_reference;
 378 extern struct ipa_opt_pass_d pass_ipa_pure_const;
 379 extern struct simple_ipa_opt_pass pass_ipa_pta;
 380 extern struct ipa_opt_pass_d pass_ipa_lto_wpa_fixup;
 381 extern struct ipa_opt_pass_d pass_ipa_lto_finish_out;
 382 extern struct simple_ipa_opt_pass pass_ipa_tm;
 383 extern struct ipa_opt_pass_d pass_ipa_profile;
 384 extern struct ipa_opt_pass_d pass_ipa_cdtor_merge;
 385
 386 extern struct gimple_opt_pass pass_cleanup_cfg_post_optimizing;
 387 extern struct gimple_opt_pass pass_init_datastructures;
 388 extern struct gimple_opt_pass pass_fixup_cfg;
 389
 390 extern struct rtl_opt_pass pass_expand;
 391 extern struct rtl_opt_pass pass_instantiate_virtual_regs;
 392 extern struct rtl_opt_pass pass_rtl_fwprop;
 393 extern struct rtl_opt_pass pass_rtl_fwprop_addr;
 394 extern struct rtl_opt_pass pass_jump;
 395 extern struct rtl_opt_pass pass_jump2;
 396 extern struct rtl_opt_pass pass_lower_subreg;
 397 extern struct rtl_opt_pass pass_cse;
 398 extern struct rtl_opt_pass pass_fast_rtl_dce;
 399 extern struct rtl_opt_pass pass_ud_rtl_dce;
 400 extern struct rtl_opt_pass pass_rtl_dce;
 401 extern struct rtl_opt_pass pass_rtl_dse1;
 402 extern struct rtl_opt_pass pass_rtl_dse2;
 403 extern struct rtl_opt_pass pass_rtl_dse3;
 404 extern struct rtl_opt_pass pass_rtl_cprop;
 405 extern struct rtl_opt_pass pass_rtl_pre;
 406 extern struct rtl_opt_pass pass_rtl_hoist;
 407 extern struct rtl_opt_pass pass_rtl_store_motion;
 408 extern struct rtl_opt_pass pass_cse_after_global_opts;
 409 extern struct rtl_opt_pass pass_rtl_ifcvt;
 410
 411 extern struct rtl_opt_pass pass_into_cfg_layout_mode;
 412 extern struct rtl_opt_pass pass_outof_cfg_layout_mode;
 413
 414 extern struct rtl_opt_pass pass_loop2;
 415 extern struct rtl_opt_pass pass_rtl_loop_init;
 416 extern struct rtl_opt_pass pass_rtl_move_loop_invariants;
 417 extern struct rtl_opt_pass pass_rtl_unswitch;
 418 extern struct rtl_opt_pass pass_rtl_unroll_and_peel_loops;
 419 extern struct rtl_opt_pass pass_rtl_doloop;
 420 extern struct rtl_opt_pass pass_rtl_loop_done;
 421
 422 extern struct rtl_opt_pass pass_web;
 423 extern struct rtl_opt_pass pass_cse2;
 424 extern struct rtl_opt_pass pass_df_initialize_opt;
 425 extern struct rtl_opt_pass pass_df_initialize_no_opt;
 426 extern struct rtl_opt_pass pass_reginfo_init;
 427 extern struct rtl_opt_pass pass_inc_dec;
 428 extern struct rtl_opt_pass pass_stack_ptr_mod;
 429 extern struct rtl_opt_pass pass_initialize_regs;
 430 extern struct rtl_opt_pass pass_combine;
 431 extern struct rtl_opt_pass pass_if_after_combine;
 432 extern struct rtl_opt_pass pass_ree;
 433 extern struct rtl_opt_pass pass_partition_blocks;
 434 extern struct rtl_opt_pass pass_match_asm_constraints;
 435 extern struct rtl_opt_pass pass_regmove;
 436 extern struct rtl_opt_pass pass_split_all_insns;
 437 extern struct rtl_opt_pass pass_fast_rtl_byte_dce;
 438 extern struct rtl_opt_pass pass_lower_subreg2;
 439 extern struct rtl_opt_pass pass_mode_switching;
 440 extern struct rtl_opt_pass pass_sms;
 441 extern struct rtl_opt_pass pass_sched;
 442 extern struct rtl_opt_pass pass_ira;
 443 extern struct rtl_opt_pass pass_reload;
 444 extern struct rtl_opt_pass pass_clean_state;
 445 extern struct rtl_opt_pass pass_branch_prob;
 446 extern struct rtl_opt_pass pass_value_profile_transformations;
 447 extern struct rtl_opt_pass pass_postreload_cse;
 448 extern struct rtl_opt_pass pass_gcse2;
 449 extern struct rtl_opt_pass pass_split_after_reload;
 450 extern struct rtl_opt_pass pass_branch_target_load_optimize1;
 451 extern struct rtl_opt_pass pass_thread_prologue_and_epilogue;
 452 extern struct rtl_opt_pass pass_stack_adjustments;
 453 extern struct rtl_opt_pass pass_peephole2;
 454 extern struct rtl_opt_pass pass_if_after_reload;
 455 extern struct rtl_opt_pass pass_regrename;
 456 extern struct rtl_opt_pass pass_cprop_hardreg;
 457 extern struct rtl_opt_pass pass_reorder_blocks;
 458 extern struct rtl_opt_pass pass_branch_target_load_optimize2;
 459 extern struct rtl_opt_pass pass_leaf_regs;
 460 extern struct rtl_opt_pass pass_split_before_sched2;
 461 extern struct rtl_opt_pass pass_compare_elim_after_reload;
 462 extern struct rtl_opt_pass pass_sched2;
 463 extern struct rtl_opt_pass pass_stack_regs;
 464 extern struct rtl_opt_pass pass_stack_regs_run;
 465 extern struct rtl_opt_pass pass_df_finish;
 466 extern struct rtl_opt_pass pass_compute_alignments;
 467 extern struct rtl_opt_pass pass_duplicate_computed_gotos;
 468 extern struct rtl_opt_pass pass_variable_tracking;
 469 extern struct rtl_opt_pass pass_free_cfg;
 470 extern struct rtl_opt_pass pass_machine_reorg;
 471 extern struct rtl_opt_pass pass_cleanup_barriers;
 472 extern struct rtl_opt_pass pass_delay_slots;
 473 extern struct rtl_opt_pass pass_split_for_shorten_branches;
 474 extern struct rtl_opt_pass pass_split_before_regstack;
 475 extern struct rtl_opt_pass pass_convert_to_eh_region_ranges;
 476 extern struct rtl_opt_pass pass_shorten_branches;
 477 extern struct rtl_opt_pass pass_set_nothrow_function_flags;
 478 extern struct rtl_opt_pass pass_dwarf2_frame;
 479 extern struct rtl_opt_pass pass_final;
 480 extern struct rtl_opt_pass pass_rtl_seqabstr;
 481 extern struct gimple_opt_pass pass_release_ssa_names;
 482 extern struct gimple_opt_pass pass_early_inline;
 483 extern struct gimple_opt_pass pass_inline_parameters;
 484 extern struct gimple_opt_pass pass_update_address_taken;
 485 extern struct gimple_opt_pass pass_convert_switch;
 486
 487 /* The root of the compilation pass tree, once constructed.  */
 488 extern struct opt_pass *all_passes, *all_small_ipa_passes, *all_lowering_passes,
 489                        *all_regular_ipa_passes, *all_lto_gen_passes, *all_late_ipa_passes;
 490
 491 /* Define a list of pass lists so that both passes.c and plugins can easily
 492    find all the pass lists.  */
 493 #define GCC_PASS_LISTS \
 494   DEF_PASS_LIST (all_lowering_passes) \
 495   DEF_PASS_LIST (all_small_ipa_passes) \
 496   DEF_PASS_LIST (all_regular_ipa_passes) \
 497   DEF_PASS_LIST (all_lto_gen_passes) \
 498   DEF_PASS_LIST (all_passes)
 499
 500 #define DEF_PASS_LIST(LIST) PASS_LIST_NO_##LIST,
 501 enum
 502 {
 503   GCC_PASS_LISTS
 504   PASS_LIST_NUM
 505 };
 506 #undef DEF_PASS_LIST
 507
 508 /* This is used by plugins, and should also be used in
 509    passes.c:register_pass.  */
 510 extern struct opt_pass **gcc_pass_lists[];
 511
 512 /* Current optimization pass.  */
 513 extern struct opt_pass *current_pass;
 514
 515 extern struct opt_pass * get_pass_for_id (int);
 516 extern bool execute_one_pass (struct opt_pass *);
 517 extern void execute_pass_list (struct opt_pass *);
 518 extern void execute_ipa_pass_list (struct opt_pass *);
 519 extern void execute_ipa_summary_passes (struct ipa_opt_pass_d *);
 520 extern void execute_all_ipa_transforms (void);
 521 extern void execute_all_ipa_stmt_fixups (struct cgraph_node *, gimple *);
 522 extern bool pass_init_dump_file (struct opt_pass *);
 523 extern void pass_fini_dump_file (struct opt_pass *);
 524
 525 extern const char *get_current_pass_name (void);
 526 extern void print_current_pass (FILE *);
 527 extern void debug_pass (void);
 528 extern void ipa_write_summaries (void);
 529 extern void ipa_write_optimization_summaries (struct cgraph_node_set_def *,
 530                                               struct varpool_node_set_def *);
 531 extern void ipa_read_summaries (void);
 532 extern void ipa_read_optimization_summaries (void);
 533 extern void register_one_dump_file (struct opt_pass *);
 534 extern bool function_called_by_processed_nodes_p (void);
 535 extern void register_pass (struct register_pass_info *);
 536
 537 /* Set to true if the pass is called the first time during compilation of the
 538    current function.  Note that using this information in the optimization
 539    passes is considered not to be clean, and it should be avoided if possible.
 540    This flag is currently used to prevent loops from being peeled repeatedly
 541    in jump threading; it will be removed once we preserve loop structures
 542    throughout the compilation -- we will be able to mark the affected loops
 543    directly in jump threading, and avoid peeling them next time.  */
 544 extern bool first_pass_instance;
 545
 546 /* Declare for plugins.  */
 547 extern void do_per_function_toporder (void (*) (void *), void *);
 548
 549 extern void disable_pass (const char *);
 550 extern void enable_pass (const char *);
 551 extern void dump_passes (void);
 552
 553 #endif /* GCC_TREE_PASS_H */