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