gcc/tree-pass.h

   1 /* Definitions for describing one tree-ssa optimization pass.
   2    Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
   3    Contributed by Richard Henderson <rth@redhat.com>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21
  22 #ifndef GCC_TREE_PASS_H
  23 #define GCC_TREE_PASS_H 1
  24
  25 /* In tree-dump.c */
  26
  27 /* Different tree dump places.  When you add new tree dump places,
  28    extend the DUMP_FILES array in tree-dump.c.  */
  29 enum tree_dump_index
  30 {
  31   TDI_none,                     /* No dump */
  32   TDI_cgraph,                   /* dump function call graph.  */
  33   TDI_tu,                       /* dump the whole translation unit.  */
  34   TDI_class,                    /* dump class hierarchy.  */
  35   TDI_original,                 /* dump each function before optimizing it */
  36   TDI_generic,                  /* dump each function after genericizing it */
  37   TDI_nested,                   /* dump each function after unnesting it */
  38   TDI_vcg,                      /* create a VCG graph file for each
  39                                    function's flowgraph.  */
  40   TDI_tree_all,                 /* enable all the GENERIC/GIMPLE dumps.  */
  41   TDI_rtl_all,                  /* enable all the RTL dumps.  */
  42   TDI_ipa_all,                  /* enable all the IPA dumps.  */
  43
  44   TDI_end
  45 };
  46
  47 /* Bit masks to control dumping. Not all values are applicable to
  48    all dumps. Add new ones at the end. When you define new
  49    values, extend the DUMP_OPTIONS array in tree-dump.c */
  50 #define TDF_ADDRESS     (1 << 0)        /* dump node addresses */
  51 #define TDF_SLIM        (1 << 1)        /* don't go wild following links */
  52 #define TDF_RAW         (1 << 2)        /* don't unparse the function */
  53 #define TDF_DETAILS     (1 << 3)        /* show more detailed info about
  54                                            each pass */
  55 #define TDF_STATS       (1 << 4)        /* dump various statistics about
  56                                            each pass */
  57 #define TDF_BLOCKS      (1 << 5)        /* display basic block boundaries */
  58 #define TDF_VOPS        (1 << 6)        /* display virtual operands */
  59 #define TDF_LINENO      (1 << 7)        /* display statement line numbers */
  60 #define TDF_UID         (1 << 8)        /* display decl UIDs */
  61
  62 #define TDF_TREE        (1 << 9)        /* is a tree dump */
  63 #define TDF_RTL         (1 << 10)       /* is a RTL dump */
  64 #define TDF_IPA         (1 << 11)       /* is an IPA dump */
  65 #define TDF_STMTADDR    (1 << 12)       /* Address of stmt.  */
  66
  67 #define TDF_GRAPH       (1 << 13)       /* a graph dump is being emitted */
  68 #define TDF_MEMSYMS     (1 << 14)       /* display memory symbols in expr.
  69                                            Implies TDF_VOPS.  */
  70
  71 #define TDF_DIAGNOSTIC  (1 << 15)       /* A dump to be put in a diagnostic
  72                                            message.  */
  73 #define TDF_VERBOSE     (1 << 16)       /* A dump that uses the full tree
  74                                            dumper to print stmts. */
  75
  76 extern char *get_dump_file_name (enum tree_dump_index);
  77 extern int dump_enabled_p (enum tree_dump_index);
  78 extern int dump_initialized_p (enum tree_dump_index);
  79 extern FILE *dump_begin (enum tree_dump_index, int *);
  80 extern void dump_end (enum tree_dump_index, FILE *);
  81 extern void dump_node (const_tree, int, FILE *);
  82 extern int dump_switch_p (const char *);
  83 extern const char *dump_flag_name (enum tree_dump_index);
  84
  85 /* Global variables used to communicate with passes.  */
  86 extern FILE *dump_file;
  87 extern int dump_flags;
  88 extern const char *dump_file_name;
  89
  90 /* Return the dump_file_info for the given phase.  */
  91 extern struct dump_file_info *get_dump_file_info (enum tree_dump_index);
  92
  93 /* Describe one pass; this is the common part shared across different pass
  94    types.  */
  95 struct opt_pass
  96 {
  97   /* Optimization pass type.  */
  98   enum opt_pass_type {
  99     GIMPLE_PASS,
 100     RTL_PASS,
 101     SIMPLE_IPA_PASS,
 102     IPA_PASS
 103   } type;
 104   /* Terse name of the pass used as a fragment of the dump file name.  */
 105   const char *name;
 106
 107   /* If non-null, this pass and all sub-passes are executed only if
 108      the function returns true.  */
 109   bool (*gate) (void);
 110
 111   /* This is the code to run.  If null, then there should be sub-passes
 112      otherwise this pass does nothing.  The return value contains
 113      TODOs to execute in addition to those in TODO_flags_finish.   */
 114   unsigned int (*execute) (void);
 115
 116   /* A list of sub-passes to run, dependent on gate predicate.  */
 117   struct opt_pass *sub;
 118
 119   /* Next in the list of passes to run, independent of gate predicate.  */
 120   struct opt_pass *next;
 121
 122   /* Static pass number, used as a fragment of the dump file name.  */
 123   int static_pass_number;
 124
 125   /* The timevar id associated with this pass.  */
 126   /* ??? Ideally would be dynamically assigned.  */
 127   unsigned int tv_id;
 128
 129   /* Sets of properties input and output from this pass.  */
 130   unsigned int properties_required;
 131   unsigned int properties_provided;
 132   unsigned int properties_destroyed;
 133
 134   /* Flags indicating common sets things to do before and after.  */
 135   unsigned int todo_flags_start;
 136   unsigned int todo_flags_finish;
 137 };
 138
 139 /* Description of GIMPLE pass.  */
 140 struct gimple_opt_pass
 141 {
 142   struct opt_pass pass;
 143 };
 144
 145 /* Decription of RTL pass.  */
 146 struct rtl_opt_pass
 147 {
 148   struct opt_pass pass;
 149 };
 150
 151 struct varpool_node;
 152 struct cgraph_node;
 153
 154 /* Description of IPA pass with generate summary, write, execute, read and
 155    transform stages.  */
 156 struct ipa_opt_pass
 157 {
 158   struct opt_pass pass;
 159
 160   /* IPA passes can analyze function body and variable initializers
 161       using this hook and produce summary.  */
 162   void (*generate_summary) (void);
 163
 164   /* This hook is used to serialize IPA summaries on disk.  */
 165   void (*write_summary) (void);
 166
 167   /* For most ipa passes, the information can only be deserialized in
 168      one chunk.  However, function bodies are read function at a time
 169      as needed so both calls are necessary.  */
 170   void (*read_summary) (void);
 171   void (*function_read_summary) (struct cgraph_node *);
 172
 173   /* Results of interprocedural propagation of an IPA pass is applied to
 174      function body via this hook.  */
 175   unsigned int function_transform_todo_flags_start;
 176   unsigned int (*function_transform) (struct cgraph_node *);
 177   void (*variable_transform) (struct varpool_node *);
 178 };
 179
 180 /* Description of simple IPA pass.  Simple IPA passes have just one execute
 181    hook.  */
 182 struct simple_ipa_opt_pass
 183 {
 184   struct opt_pass pass;
 185 };
 186
 187 /* Define a tree dump switch.  */
 188 struct dump_file_info
 189 {
 190   const char *suffix;           /* suffix to give output file.  */
 191   const char *swtch;            /* command line switch */
 192   const char *glob;             /* command line glob  */
 193   int flags;                    /* user flags */
 194   int state;                    /* state of play */
 195   int num;                      /* dump file number */
 196 };
 197
 198 /* Pass properties.  */
 199 #define PROP_gimple_any         (1 << 0)        /* entire gimple grammar */
 200 #define PROP_gimple_lcf         (1 << 1)        /* lowered control flow */
 201 #define PROP_gimple_leh         (1 << 2)        /* lowered eh */
 202 #define PROP_cfg                (1 << 3)
 203 #define PROP_referenced_vars    (1 << 4)
 204 #define PROP_ssa                (1 << 5)
 205 #define PROP_no_crit_edges      (1 << 6)
 206 #define PROP_rtl                (1 << 7)
 207 #define PROP_alias              (1 << 8)
 208 #define PROP_gimple_lomp        (1 << 9)        /* lowered OpenMP directives */
 209
 210 #define PROP_trees \
 211   (PROP_gimple_any | PROP_gimple_lcf | PROP_gimple_leh | PROP_gimple_lomp)
 212
 213 /* To-do flags.  */
 214 #define TODO_dump_func                  (1 << 0)
 215 #define TODO_ggc_collect                (1 << 1)
 216 #define TODO_verify_ssa                 (1 << 2)
 217 #define TODO_verify_flow                (1 << 3)
 218 #define TODO_verify_stmts               (1 << 4)
 219 #define TODO_cleanup_cfg                (1 << 5)
 220 #define TODO_verify_loops               (1 << 6)
 221 #define TODO_dump_cgraph                (1 << 7)
 222 #define TODO_remove_functions           (1 << 8)
 223 #define TODO_rebuild_frequencies        (1 << 9)
 224 #define TODO_verify_rtl_sharing         (1 << 10)
 225
 226 /* To-do flags for calls to update_ssa.  */
 227
 228 /* Update the SSA form inserting PHI nodes for newly exposed symbols
 229    and virtual names marked for updating.  When updating real names,
 230    only insert PHI nodes for a real name O_j in blocks reached by all
 231    the new and old definitions for O_j.  If the iterated dominance
 232    frontier for O_j is not pruned, we may end up inserting PHI nodes
 233    in blocks that have one or more edges with no incoming definition
 234    for O_j.  This would lead to uninitialized warnings for O_j's
 235    symbol.  */
 236 #define TODO_update_ssa                 (1 << 11)
 237
 238 /* Update the SSA form without inserting any new PHI nodes at all.
 239    This is used by passes that have either inserted all the PHI nodes
 240    themselves or passes that need only to patch use-def and def-def
 241    chains for virtuals (e.g., DCE).  */
 242 #define TODO_update_ssa_no_phi          (1 << 12)
 243
 244 /* Insert PHI nodes everywhere they are needed.  No pruning of the
 245    IDF is done.  This is used by passes that need the PHI nodes for
 246    O_j even if it means that some arguments will come from the default
 247    definition of O_j's symbol (e.g., pass_linear_transform).
 248
 249    WARNING: If you need to use this flag, chances are that your pass
 250    may be doing something wrong.  Inserting PHI nodes for an old name
 251    where not all edges carry a new replacement may lead to silent
 252    codegen errors or spurious uninitialized warnings.  */
 253 #define TODO_update_ssa_full_phi        (1 << 13)
 254
 255 /* Passes that update the SSA form on their own may want to delegate
 256    the updating of virtual names to the generic updater.  Since FUD
 257    chains are easier to maintain, this simplifies the work they need
 258    to do.  NOTE: If this flag is used, any OLD->NEW mappings for real
 259    names are explicitly destroyed and only the symbols marked for
 260    renaming are processed.  */
 261 #define TODO_update_ssa_only_virtuals   (1 << 14)
 262
 263 /* Some passes leave unused local variables that can be removed from
 264    cfun->local_decls.  This reduces the size of dump files
 265    and the memory footprint for VAR_DECLs.  */
 266 #define TODO_remove_unused_locals       (1 << 15)
 267
 268 /* Internally used for the first in a sequence of passes.  It is set
 269    for the passes that are handed to register_dump_files.  */
 270 #define TODO_set_props                  (1 << 16)
 271
 272 /* Call df_finish at the end of the pass.  This is done after all of
 273    the dumpers have been allowed to run so that they have access to
 274    the instance before it is destroyed.  */
 275 #define TODO_df_finish                  (1 << 17)
 276
 277 /* Call df_verify at the end of the pass if checking is enabled.  */
 278 #define TODO_df_verify                  (1 << 18)
 279
 280 /* Internally used for the first instance of a pass.  */
 281 #define TODO_mark_first_instance        (1 << 19)
 282
 283 /* Rebuild aliasing info.  */
 284 #define TODO_rebuild_alias                (1 << 20)
 285
 286 #define TODO_update_ssa_any             \
 287     (TODO_update_ssa                    \
 288      | TODO_update_ssa_no_phi           \
 289      | TODO_update_ssa_full_phi         \
 290      | TODO_update_ssa_only_virtuals)
 291
 292 #define TODO_verify_all \
 293   (TODO_verify_ssa | TODO_verify_flow | TODO_verify_stmts)
 294
 295 extern void tree_lowering_passes (tree decl);
 296
 297 extern struct gimple_opt_pass pass_mudflap_1;
 298 extern struct gimple_opt_pass pass_mudflap_2;
 299 extern struct gimple_opt_pass pass_remove_useless_stmts;
 300 extern struct gimple_opt_pass pass_lower_cf;
 301 extern struct gimple_opt_pass pass_refactor_eh;
 302 extern struct gimple_opt_pass pass_lower_eh;
 303 extern struct gimple_opt_pass pass_build_cfg;
 304 extern struct gimple_opt_pass pass_tree_profile;
 305 extern struct gimple_opt_pass pass_early_tree_profile;
 306 extern struct gimple_opt_pass pass_cleanup_cfg;
 307 extern struct gimple_opt_pass pass_referenced_vars;
 308 extern struct gimple_opt_pass pass_sra;
 309 extern struct gimple_opt_pass pass_sra_early;
 310 extern struct gimple_opt_pass pass_tail_recursion;
 311 extern struct gimple_opt_pass pass_tail_calls;
 312 extern struct gimple_opt_pass pass_tree_loop;
 313 extern struct gimple_opt_pass pass_tree_loop_init;
 314 extern struct gimple_opt_pass pass_lim;
 315 extern struct gimple_opt_pass pass_tree_unswitch;
 316 extern struct gimple_opt_pass pass_predcom;
 317 extern struct gimple_opt_pass pass_iv_canon;
 318 extern struct gimple_opt_pass pass_scev_cprop;
 319 extern struct gimple_opt_pass pass_empty_loop;
 320 extern struct gimple_opt_pass pass_record_bounds;
 321 extern struct gimple_opt_pass pass_if_conversion;
 322 extern struct gimple_opt_pass pass_loop_distribution;
 323 extern struct gimple_opt_pass pass_vectorize;
 324 extern struct gimple_opt_pass pass_complete_unroll;
 325 extern struct gimple_opt_pass pass_complete_unrolli;
 326 extern struct gimple_opt_pass pass_parallelize_loops;
 327 extern struct gimple_opt_pass pass_loop_prefetch;
 328 extern struct gimple_opt_pass pass_iv_optimize;
 329 extern struct gimple_opt_pass pass_tree_loop_done;
 330 extern struct gimple_opt_pass pass_ch;
 331 extern struct gimple_opt_pass pass_ccp;
 332 extern struct gimple_opt_pass pass_phi_only_cprop;
 333 extern struct gimple_opt_pass pass_build_ssa;
 334 extern struct gimple_opt_pass pass_del_ssa;
 335 extern struct gimple_opt_pass pass_build_alias;
 336 extern struct gimple_opt_pass pass_dominator;
 337 extern struct gimple_opt_pass pass_dce;
 338 extern struct gimple_opt_pass pass_dce_loop;
 339 extern struct gimple_opt_pass pass_cd_dce;
 340 extern struct gimple_opt_pass pass_merge_phi;
 341 extern struct gimple_opt_pass pass_split_crit_edges;
 342 extern struct gimple_opt_pass pass_pre;
 343 extern struct gimple_opt_pass pass_profile;
 344 extern struct gimple_opt_pass pass_lower_complex_O0;
 345 extern struct gimple_opt_pass pass_lower_complex;
 346 extern struct gimple_opt_pass pass_lower_vector;
 347 extern struct gimple_opt_pass pass_lower_vector_ssa;
 348 extern struct gimple_opt_pass pass_lower_omp;
 349 extern struct gimple_opt_pass pass_expand_omp;
 350 extern struct gimple_opt_pass pass_expand_omp_ssa;
 351 extern struct gimple_opt_pass pass_object_sizes;
 352 extern struct gimple_opt_pass pass_fold_builtins;
 353 extern struct gimple_opt_pass pass_stdarg;
 354 extern struct gimple_opt_pass pass_early_warn_uninitialized;
 355 extern struct gimple_opt_pass pass_late_warn_uninitialized;
 356 extern struct gimple_opt_pass pass_cse_reciprocals;
 357 extern struct gimple_opt_pass pass_cse_sincos;
 358 extern struct gimple_opt_pass pass_convert_to_rsqrt;
 359 extern struct gimple_opt_pass pass_warn_function_return;
 360 extern struct gimple_opt_pass pass_warn_function_noreturn;
 361 extern struct gimple_opt_pass pass_cselim;
 362 extern struct gimple_opt_pass pass_phiopt;
 363 extern struct gimple_opt_pass pass_forwprop;
 364 extern struct gimple_opt_pass pass_phiprop;
 365 extern struct gimple_opt_pass pass_tree_ifcombine;
 366 extern struct gimple_opt_pass pass_dse;
 367 extern struct gimple_opt_pass pass_simple_dse;
 368 extern struct gimple_opt_pass pass_nrv;
 369 extern struct gimple_opt_pass pass_mark_used_blocks;
 370 extern struct gimple_opt_pass pass_rename_ssa_copies;
 371 extern struct gimple_opt_pass pass_rest_of_compilation;
 372 extern struct gimple_opt_pass pass_sink_code;
 373 extern struct gimple_opt_pass pass_fre;
 374 extern struct gimple_opt_pass pass_linear_transform;
 375 extern struct gimple_opt_pass pass_check_data_deps;
 376 extern struct gimple_opt_pass pass_copy_prop;
 377 extern struct gimple_opt_pass pass_store_ccp;
 378 extern struct gimple_opt_pass pass_vrp;
 379 extern struct gimple_opt_pass pass_uncprop;
 380 extern struct gimple_opt_pass pass_return_slot;
 381 extern struct gimple_opt_pass pass_reassoc;
 382 extern struct gimple_opt_pass pass_rebuild_cgraph_edges;
 383 extern struct gimple_opt_pass pass_build_cgraph_edges;
 384 extern struct gimple_opt_pass pass_reset_cc_flags;
 385
 386 /* IPA Passes */
 387 extern struct ipa_opt_pass pass_ipa_inline;
 388 extern struct simple_ipa_opt_pass pass_ipa_reference;
 389
 390 extern struct simple_ipa_opt_pass pass_ipa_matrix_reorg;
 391 extern struct simple_ipa_opt_pass pass_ipa_cp;
 392 extern struct simple_ipa_opt_pass pass_ipa_early_inline;
 393 extern struct simple_ipa_opt_pass pass_ipa_pure_const;
 394 extern struct simple_ipa_opt_pass pass_ipa_type_escape;
 395 extern struct simple_ipa_opt_pass pass_ipa_pta;
 396 extern struct simple_ipa_opt_pass pass_ipa_struct_reorg;
 397 extern struct simple_ipa_opt_pass pass_early_local_passes;
 398 extern struct simple_ipa_opt_pass pass_ipa_increase_alignment;
 399 extern struct simple_ipa_opt_pass pass_ipa_function_and_variable_visibility;
 400
 401 extern struct gimple_opt_pass pass_all_optimizations;
 402 extern struct gimple_opt_pass pass_cleanup_cfg_post_optimizing;
 403 extern struct gimple_opt_pass pass_free_cfg_annotations;
 404 extern struct gimple_opt_pass pass_free_datastructures;
 405 extern struct gimple_opt_pass pass_init_datastructures;
 406 extern struct gimple_opt_pass pass_fixup_cfg;
 407
 408 extern struct rtl_opt_pass pass_expand;
 409 extern struct rtl_opt_pass pass_init_function;
 410 extern struct rtl_opt_pass pass_jump;
 411 extern struct rtl_opt_pass pass_rtl_eh;
 412 extern struct rtl_opt_pass pass_initial_value_sets;
 413 extern struct rtl_opt_pass pass_unshare_all_rtl;
 414 extern struct rtl_opt_pass pass_instantiate_virtual_regs;
 415 extern struct rtl_opt_pass pass_rtl_fwprop;
 416 extern struct rtl_opt_pass pass_rtl_fwprop_addr;
 417 extern struct rtl_opt_pass pass_jump2;
 418 extern struct rtl_opt_pass pass_lower_subreg;
 419 extern struct rtl_opt_pass pass_cse;
 420 extern struct rtl_opt_pass pass_fast_rtl_dce;
 421 extern struct rtl_opt_pass pass_ud_rtl_dce;
 422 extern struct rtl_opt_pass pass_rtl_dce;
 423 extern struct rtl_opt_pass pass_rtl_dse1;
 424 extern struct rtl_opt_pass pass_rtl_dse2;
 425 extern struct rtl_opt_pass pass_rtl_dse3;
 426 extern struct rtl_opt_pass pass_gcse;
 427 extern struct rtl_opt_pass pass_jump_bypass;
 428 extern struct rtl_opt_pass pass_profiling;
 429 extern struct rtl_opt_pass pass_rtl_ifcvt;
 430 extern struct gimple_opt_pass pass_tracer;
 431
 432 extern struct rtl_opt_pass pass_into_cfg_layout_mode;
 433 extern struct rtl_opt_pass pass_outof_cfg_layout_mode;
 434
 435 extern struct rtl_opt_pass pass_loop2;
 436 extern struct rtl_opt_pass pass_rtl_loop_init;
 437 extern struct rtl_opt_pass pass_rtl_move_loop_invariants;
 438 extern struct rtl_opt_pass pass_rtl_unswitch;
 439 extern struct rtl_opt_pass pass_rtl_unroll_and_peel_loops;
 440 extern struct rtl_opt_pass pass_rtl_doloop;
 441 extern struct rtl_opt_pass pass_rtl_loop_done;
 442
 443 extern struct rtl_opt_pass pass_web;
 444 extern struct rtl_opt_pass pass_cse2;
 445 extern struct rtl_opt_pass pass_df_initialize_opt;
 446 extern struct rtl_opt_pass pass_df_initialize_no_opt;
 447 extern struct rtl_opt_pass pass_regclass_init;
 448 extern struct rtl_opt_pass pass_subregs_of_mode_init;
 449 extern struct rtl_opt_pass pass_subregs_of_mode_finish;
 450 extern struct rtl_opt_pass pass_inc_dec;
 451 extern struct rtl_opt_pass pass_stack_ptr_mod;
 452 extern struct rtl_opt_pass pass_initialize_regs;
 453 extern struct rtl_opt_pass pass_combine;
 454 extern struct rtl_opt_pass pass_if_after_combine;
 455 extern struct rtl_opt_pass pass_partition_blocks;
 456 extern struct rtl_opt_pass pass_match_asm_constraints;
 457 extern struct rtl_opt_pass pass_regmove;
 458 extern struct rtl_opt_pass pass_split_all_insns;
 459 extern struct rtl_opt_pass pass_fast_rtl_byte_dce;
 460 extern struct rtl_opt_pass pass_lower_subreg2;
 461 extern struct rtl_opt_pass pass_mode_switching;
 462 extern struct rtl_opt_pass pass_see;
 463 extern struct rtl_opt_pass pass_sms;
 464 extern struct rtl_opt_pass pass_sched;
 465 extern struct rtl_opt_pass pass_local_alloc;
 466 extern struct rtl_opt_pass pass_global_alloc;
 467 extern struct rtl_opt_pass pass_postreload;
 468 extern struct rtl_opt_pass pass_clean_state;
 469 extern struct rtl_opt_pass pass_branch_prob;
 470 extern struct rtl_opt_pass pass_value_profile_transformations;
 471 extern struct rtl_opt_pass pass_postreload_cse;
 472 extern struct rtl_opt_pass pass_gcse2;
 473 extern struct rtl_opt_pass pass_split_after_reload;
 474 extern struct rtl_opt_pass pass_branch_target_load_optimize1;
 475 extern struct rtl_opt_pass pass_thread_prologue_and_epilogue;
 476 extern struct rtl_opt_pass pass_stack_adjustments;
 477 extern struct rtl_opt_pass pass_peephole2;
 478 extern struct rtl_opt_pass pass_if_after_reload;
 479 extern struct rtl_opt_pass pass_regrename;
 480 extern struct rtl_opt_pass pass_cprop_hardreg;
 481 extern struct rtl_opt_pass pass_reorder_blocks;
 482 extern struct rtl_opt_pass pass_branch_target_load_optimize2;
 483 extern struct rtl_opt_pass pass_leaf_regs;
 484 extern struct rtl_opt_pass pass_split_before_sched2;
 485 extern struct rtl_opt_pass pass_sched2;
 486 extern struct rtl_opt_pass pass_stack_regs;
 487 extern struct rtl_opt_pass pass_stack_regs_run;
 488 extern struct rtl_opt_pass pass_df_finish;
 489 extern struct rtl_opt_pass pass_compute_alignments;
 490 extern struct rtl_opt_pass pass_duplicate_computed_gotos;
 491 extern struct rtl_opt_pass pass_variable_tracking;
 492 extern struct rtl_opt_pass pass_free_cfg;
 493 extern struct rtl_opt_pass pass_machine_reorg;
 494 extern struct rtl_opt_pass pass_cleanup_barriers;
 495 extern struct rtl_opt_pass pass_delay_slots;
 496 extern struct rtl_opt_pass pass_split_for_shorten_branches;
 497 extern struct rtl_opt_pass pass_split_before_regstack;
 498 extern struct rtl_opt_pass pass_convert_to_eh_region_ranges;
 499 extern struct rtl_opt_pass pass_shorten_branches;
 500 extern struct rtl_opt_pass pass_set_nothrow_function_flags;
 501 extern struct rtl_opt_pass pass_final;
 502 extern struct rtl_opt_pass pass_rtl_seqabstr;
 503 extern struct gimple_opt_pass pass_release_ssa_names;
 504 extern struct gimple_opt_pass pass_early_inline;
 505 extern struct gimple_opt_pass pass_O0_always_inline;
 506 extern struct gimple_opt_pass pass_inline_parameters;
 507 extern struct gimple_opt_pass pass_all_early_optimizations;
 508 extern struct gimple_opt_pass pass_update_address_taken;
 509
 510 /* The root of the compilation pass tree, once constructed.  */
 511 extern struct opt_pass *all_passes, *all_ipa_passes, *all_lowering_passes;
 512
 513 /* Current optimization pass.  */
 514 extern struct opt_pass *current_pass;
 515
 516 extern struct opt_pass * get_pass_for_id (int);
 517 extern void execute_pass_list (struct opt_pass *);
 518 extern void execute_ipa_pass_list (struct opt_pass *);
 519 extern void print_current_pass (FILE *);
 520 extern void debug_pass (void);
 521
 522 /* Set to true if the pass is called the first time during compilation of the
 523    current function.  Note that using this information in the optimization
 524    passes is considered not to be clean, and it should be avoided if possible.
 525    This flag is currently used to prevent loops from being peeled repeatedly
 526    in jump threading; it will be removed once we preserve loop structures
 527    throughout the compilation -- we will be able to mark the affected loops
 528    directly in jump threading, and avoid peeling them next time.  */
 529 extern bool first_pass_instance;
 530
 531 #endif /* GCC_TREE_PASS_H */