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