gcc/tree-pass.h

   1 /* Definitions for describing one tree-ssa optimization pass.
   2    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009
   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 /* In tree-dump.c */
  27
  28 /* Different tree dump places.  When you add new tree dump places,
  29    extend the DUMP_FILES array in tree-dump.c.  */
  30 enum tree_dump_index
  31 {
  32   TDI_none,                     /* No dump */
  33   TDI_cgraph,                   /* dump function call graph.  */
  34   TDI_tu,                       /* dump the whole translation unit.  */
  35   TDI_class,                    /* dump class hierarchy.  */
  36   TDI_original,                 /* dump each function before optimizing it */
  37   TDI_generic,                  /* dump each function after genericizing it */
  38   TDI_nested,                   /* dump each function after unnesting it */
  39   TDI_vcg,                      /* create a VCG graph file for each
  40                                    function's flowgraph.  */
  41   TDI_tree_all,                 /* enable all the GENERIC/GIMPLE dumps.  */
  42   TDI_rtl_all,                  /* enable all the RTL dumps.  */
  43   TDI_ipa_all,                  /* enable all the IPA dumps.  */
  44
  45   TDI_end
  46 };
  47
  48 /* Bit masks to control dumping. Not all values are applicable to
  49    all dumps. Add new ones at the end. When you define new
  50    values, extend the DUMP_OPTIONS array in tree-dump.c */
  51 #define TDF_ADDRESS     (1 << 0)        /* dump node addresses */
  52 #define TDF_SLIM        (1 << 1)        /* don't go wild following links */
  53 #define TDF_RAW         (1 << 2)        /* don't unparse the function */
  54 #define TDF_DETAILS     (1 << 3)        /* show more detailed info about
  55                                            each pass */
  56 #define TDF_STATS       (1 << 4)        /* dump various statistics about
  57                                            each pass */
  58 #define TDF_BLOCKS      (1 << 5)        /* display basic block boundaries */
  59 #define TDF_VOPS        (1 << 6)        /* display virtual operands */
  60 #define TDF_LINENO      (1 << 7)        /* display statement line numbers */
  61 #define TDF_UID         (1 << 8)        /* display decl UIDs */
  62
  63 #define TDF_TREE        (1 << 9)        /* is a tree dump */
  64 #define TDF_RTL         (1 << 10)       /* is a RTL dump */
  65 #define TDF_IPA         (1 << 11)       /* is an IPA dump */
  66 #define TDF_STMTADDR    (1 << 12)       /* Address of stmt.  */
  67
  68 #define TDF_GRAPH       (1 << 13)       /* a graph dump is being emitted */
  69 #define TDF_MEMSYMS     (1 << 14)       /* display memory symbols in expr.
  70                                            Implies TDF_VOPS.  */
  71
  72 #define TDF_DIAGNOSTIC  (1 << 15)       /* A dump to be put in a diagnostic
  73                                            message.  */
  74 #define TDF_VERBOSE     (1 << 16)       /* A dump that uses the full tree
  75                                            dumper to print stmts.  */
  76 #define TDF_RHS_ONLY    (1 << 17)       /* a flag to only print the RHS of
  77                                            a gimple stmt.  */
  78
  79 extern char *get_dump_file_name (enum tree_dump_index);
  80 extern int dump_enabled_p (enum tree_dump_index);
  81 extern int dump_initialized_p (enum tree_dump_index);
  82 extern FILE *dump_begin (enum tree_dump_index, int *);
  83 extern void dump_end (enum tree_dump_index, FILE *);
  84 extern void dump_node (const_tree, int, FILE *);
  85 extern int dump_switch_p (const char *);
  86 extern const char *dump_flag_name (enum tree_dump_index);
  87
  88 /* Global variables used to communicate with passes.  */
  89 extern FILE *dump_file;
  90 extern int dump_flags;
  91 extern const char *dump_file_name;
  92
  93 /* Return the dump_file_info for the given phase.  */
  94 extern struct dump_file_info *get_dump_file_info (enum tree_dump_index);
  95
  96 /* Describe one pass; this is the common part shared across different pass
  97    types.  */
  98 struct opt_pass
  99 {
 100   /* Optimization pass type.  */
 101   enum opt_pass_type {
 102     GIMPLE_PASS,
 103     RTL_PASS,
 104     SIMPLE_IPA_PASS,
 105     IPA_PASS
 106   } type;
 107   /* Terse name of the pass used as a fragment of the dump file
 108      name.  If the name starts with a star, no dump happens. */
 109   const char *name;
 110
 111   /* If non-null, this pass and all sub-passes are executed only if
 112      the function returns true.  */
 113   bool (*gate) (void);
 114
 115   /* This is the code to run.  If null, then there should be sub-passes
 116      otherwise this pass does nothing.  The return value contains
 117      TODOs to execute in addition to those in TODO_flags_finish.   */
 118   unsigned int (*execute) (void);
 119
 120   /* A list of sub-passes to run, dependent on gate predicate.  */
 121   struct opt_pass *sub;
 122
 123   /* Next in the list of passes to run, independent of gate predicate.  */
 124   struct opt_pass *next;
 125
 126   /* Static pass number, used as a fragment of the dump file name.  */
 127   int static_pass_number;
 128
 129   /* The timevar id associated with this pass.  */
 130   /* ??? Ideally would be dynamically assigned.  */
 131   unsigned int tv_id;
 132
 133   /* Sets of properties input and output from this pass.  */
 134   unsigned int properties_required;
 135   unsigned int properties_provided;
 136   unsigned int properties_destroyed;
 137
 138   /* Flags indicating common sets things to do before and after.  */
 139   unsigned int todo_flags_start;
 140   unsigned int todo_flags_finish;
 141 };
 142
 143 /* Description of GIMPLE pass.  */
 144 struct gimple_opt_pass
 145 {
 146   struct opt_pass pass;
 147 };
 148
 149 /* Description of RTL pass.  */
 150 struct rtl_opt_pass
 151 {
 152   struct opt_pass pass;
 153 };
 154
 155 struct varpool_node;
 156 struct cgraph_node;
 157
 158 /* Description of IPA pass with generate summary, write, execute, read and
 159    transform stages.  */
 160 struct ipa_opt_pass
 161 {
 162   struct opt_pass pass;
 163
 164   /* IPA passes can analyze function body and variable initializers
 165       using this hook and produce summary.  */
 166   void (*generate_summary) (void);
 167
 168   /* This hook is used to serialize IPA summaries on disk.  */
 169   void (*write_summary) (void);
 170
 171   /* For most ipa passes, the information can only be deserialized in
 172      one chunk.  However, function bodies are read function at a time
 173      as needed so both calls are necessary.  */
 174   void (*read_summary) (void);
 175   void (*function_read_summary) (struct cgraph_node *);
 176
 177   /* Results of interprocedural propagation of an IPA pass is applied to
 178      function body via this hook.  */
 179   unsigned int function_transform_todo_flags_start;
 180   unsigned int (*function_transform) (struct cgraph_node *);
 181   void (*variable_transform) (struct varpool_node *);
 182 };
 183
 184 /* Description of simple IPA pass.  Simple IPA passes have just one execute
 185    hook.  */
 186 struct simple_ipa_opt_pass
 187 {
 188   struct opt_pass pass;
 189 };
 190
 191 /* Define a tree dump switch.  */
 192 struct dump_file_info
 193 {
 194   const char *suffix;           /* suffix to give output file.  */
 195   const char *swtch;            /* command line switch */
 196   const char *glob;             /* command line glob  */
 197   int flags;                    /* user flags */
 198   int state;                    /* state of play */
 199   int num;                      /* dump file number */
 200 };
 201
 202 /* Pass properties.  */
 203 #define PROP_gimple_any         (1 << 0)        /* entire gimple grammar */
 204 #define PROP_gimple_lcf         (1 << 1)        /* lowered control flow */
 205 #define PROP_gimple_leh         (1 << 2)        /* lowered eh */
 206 #define PROP_cfg                (1 << 3)
 207 #define PROP_referenced_vars    (1 << 4)
 208 #define PROP_ssa                (1 << 5)
 209 #define PROP_no_crit_edges      (1 << 6)
 210 #define PROP_rtl                (1 << 7)
 211 #define PROP_alias              (1 << 8)
 212 #define PROP_gimple_lomp        (1 << 9)        /* lowered OpenMP directives */
 213
 214 #define PROP_trees \
 215   (PROP_gimple_any | PROP_gimple_lcf | PROP_gimple_leh | PROP_gimple_lomp)
 216
 217 /* To-do flags.  */
 218 #define TODO_dump_func                  (1 << 0)
 219 #define TODO_ggc_collect                (1 << 1)
 220 #define TODO_verify_ssa                 (1 << 2)
 221 #define TODO_verify_flow                (1 << 3)
 222 #define TODO_verify_stmts               (1 << 4)
 223 #define TODO_cleanup_cfg                (1 << 5)
 224 #define TODO_verify_loops               (1 << 6)
 225 #define TODO_dump_cgraph                (1 << 7)
 226 #define TODO_remove_functions           (1 << 8)
 227 #define TODO_rebuild_frequencies        (1 << 9)
 228 #define TODO_verify_rtl_sharing         (1 << 10)
 229
 230 /* To-do flags for calls to update_ssa.  */
 231
 232 /* Update the SSA form inserting PHI nodes for newly exposed symbols
 233    and virtual names marked for updating.  When updating real names,
 234    only insert PHI nodes for a real name O_j in blocks reached by all
 235    the new and old definitions for O_j.  If the iterated dominance
 236    frontier for O_j is not pruned, we may end up inserting PHI nodes
 237    in blocks that have one or more edges with no incoming definition
 238    for O_j.  This would lead to uninitialized warnings for O_j's
 239    symbol.  */
 240 #define TODO_update_ssa                 (1 << 11)
 241
 242 /* Update the SSA form without inserting any new PHI nodes at all.
 243    This is used by passes that have either inserted all the PHI nodes
 244    themselves or passes that need only to patch use-def and def-def
 245    chains for virtuals (e.g., DCE).  */
 246 #define TODO_update_ssa_no_phi          (1 << 12)
 247
 248 /* Insert PHI nodes everywhere they are needed.  No pruning of the
 249    IDF is done.  This is used by passes that need the PHI nodes for
 250    O_j even if it means that some arguments will come from the default
 251    definition of O_j's symbol (e.g., pass_linear_transform).
 252
 253    WARNING: If you need to use this flag, chances are that your pass
 254    may be doing something wrong.  Inserting PHI nodes for an old name
 255    where not all edges carry a new replacement may lead to silent
 256    codegen errors or spurious uninitialized warnings.  */
 257 #define TODO_update_ssa_full_phi        (1 << 13)
 258
 259 /* Passes that update the SSA form on their own may want to delegate
 260    the updating of virtual names to the generic updater.  Since FUD
 261    chains are easier to maintain, this simplifies the work they need
 262    to do.  NOTE: If this flag is used, any OLD->NEW mappings for real
 263    names are explicitly destroyed and only the symbols marked for
 264    renaming are processed.  */
 265 #define TODO_update_ssa_only_virtuals   (1 << 14)
 266
 267 /* Some passes leave unused local variables that can be removed from
 268    cfun->local_decls.  This reduces the size of dump files
 269    and the memory footprint for VAR_DECLs.  */
 270 #define TODO_remove_unused_locals       (1 << 15)
 271
 272 /* Internally used for the first in a sequence of passes.  It is set
 273    for the passes that are handed to register_dump_files.  */
 274 #define TODO_set_props                  (1 << 16)
 275
 276 /* Call df_finish at the end of the pass.  This is done after all of
 277    the dumpers have been allowed to run so that they have access to
 278    the instance before it is destroyed.  */
 279 #define TODO_df_finish                  (1 << 17)
 280
 281 /* Call df_verify at the end of the pass if checking is enabled.  */
 282 #define TODO_df_verify                  (1 << 18)
 283
 284 /* Internally used for the first instance of a pass.  */
 285 #define TODO_mark_first_instance        (1 << 19)
 286
 287 /* Rebuild aliasing info.  */
 288 #define TODO_rebuild_alias                (1 << 20)
 289
 290 #define TODO_update_ssa_any             \
 291     (TODO_update_ssa                    \
 292      | TODO_update_ssa_no_phi           \
 293      | TODO_update_ssa_full_phi         \
 294      | TODO_update_ssa_only_virtuals)
 295
 296 #define TODO_verify_all \
 297   (TODO_verify_ssa | TODO_verify_flow | TODO_verify_stmts)
 298
 299 extern void tree_lowering_passes (tree decl);
 300
 301 extern struct gimple_opt_pass pass_mudflap_1;
 302 extern struct gimple_opt_pass pass_mudflap_2;
 303 extern struct gimple_opt_pass pass_remove_useless_stmts;
 304 extern struct gimple_opt_pass pass_lower_cf;
 305 extern struct gimple_opt_pass pass_refactor_eh;
 306 extern struct gimple_opt_pass pass_lower_eh;
 307 extern struct gimple_opt_pass pass_build_cfg;
 308 extern struct gimple_opt_pass pass_tree_profile;
 309 extern struct gimple_opt_pass pass_early_tree_profile;
 310 extern struct gimple_opt_pass pass_cleanup_cfg;
 311 extern struct gimple_opt_pass pass_referenced_vars;
 312 extern struct gimple_opt_pass pass_sra;
 313 extern struct gimple_opt_pass pass_sra_early;
 314 extern struct gimple_opt_pass pass_tail_recursion;
 315 extern struct gimple_opt_pass pass_tail_calls;
 316 extern struct gimple_opt_pass pass_tree_loop;
 317 extern struct gimple_opt_pass pass_tree_loop_init;
 318 extern struct gimple_opt_pass pass_lim;
 319 extern struct gimple_opt_pass pass_tree_unswitch;
 320 extern struct gimple_opt_pass pass_predcom;
 321 extern struct gimple_opt_pass pass_iv_canon;
 322 extern struct gimple_opt_pass pass_scev_cprop;
 323 extern struct gimple_opt_pass pass_empty_loop;
 324 extern struct gimple_opt_pass pass_record_bounds;
 325 extern struct gimple_opt_pass pass_graphite_transforms;
 326 extern struct gimple_opt_pass pass_if_conversion;
 327 extern struct gimple_opt_pass pass_loop_distribution;
 328 extern struct gimple_opt_pass pass_vectorize;
 329 extern struct gimple_opt_pass pass_complete_unroll;
 330 extern struct gimple_opt_pass pass_complete_unrolli;
 331 extern struct gimple_opt_pass pass_parallelize_loops;
 332 extern struct gimple_opt_pass pass_loop_prefetch;
 333 extern struct gimple_opt_pass pass_iv_optimize;
 334 extern struct gimple_opt_pass pass_tree_loop_done;
 335 extern struct gimple_opt_pass pass_ch;
 336 extern struct gimple_opt_pass pass_ccp;
 337 extern struct gimple_opt_pass pass_phi_only_cprop;
 338 extern struct gimple_opt_pass pass_build_ssa;
 339 extern struct gimple_opt_pass pass_del_ssa;
 340 extern struct gimple_opt_pass pass_build_alias;
 341 extern struct gimple_opt_pass pass_dominator;
 342 extern struct gimple_opt_pass pass_dce;
 343 extern struct gimple_opt_pass pass_dce_loop;
 344 extern struct gimple_opt_pass pass_cd_dce;
 345 extern struct gimple_opt_pass pass_call_cdce;
 346 extern struct gimple_opt_pass pass_merge_phi;
 347 extern struct gimple_opt_pass pass_split_crit_edges;
 348 extern struct gimple_opt_pass pass_pre;
 349 extern struct gimple_opt_pass pass_profile;
 350 extern struct gimple_opt_pass pass_strip_predict_hints;
 351 extern struct gimple_opt_pass pass_lower_complex_O0;
 352 extern struct gimple_opt_pass pass_lower_complex;
 353 extern struct gimple_opt_pass pass_lower_vector;
 354 extern struct gimple_opt_pass pass_lower_vector_ssa;
 355 extern struct gimple_opt_pass pass_lower_omp;
 356 extern struct gimple_opt_pass pass_expand_omp;
 357 extern struct gimple_opt_pass pass_expand_omp_ssa;
 358 extern struct gimple_opt_pass pass_object_sizes;
 359 extern struct gimple_opt_pass pass_fold_builtins;
 360 extern struct gimple_opt_pass pass_stdarg;
 361 extern struct gimple_opt_pass pass_early_warn_uninitialized;
 362 extern struct gimple_opt_pass pass_late_warn_uninitialized;
 363 extern struct gimple_opt_pass pass_cse_reciprocals;
 364 extern struct gimple_opt_pass pass_cse_sincos;
 365 extern struct gimple_opt_pass pass_convert_to_rsqrt;
 366 extern struct gimple_opt_pass pass_warn_function_return;
 367 extern struct gimple_opt_pass pass_warn_function_noreturn;
 368 extern struct gimple_opt_pass pass_cselim;
 369 extern struct gimple_opt_pass pass_phiopt;
 370 extern struct gimple_opt_pass pass_forwprop;
 371 extern struct gimple_opt_pass pass_phiprop;
 372 extern struct gimple_opt_pass pass_tree_ifcombine;
 373 extern struct gimple_opt_pass pass_dse;
 374 extern struct gimple_opt_pass pass_simple_dse;
 375 extern struct gimple_opt_pass pass_nrv;
 376 extern struct gimple_opt_pass pass_mark_used_blocks;
 377 extern struct gimple_opt_pass pass_rename_ssa_copies;
 378 extern struct gimple_opt_pass pass_rest_of_compilation;
 379 extern struct gimple_opt_pass pass_sink_code;
 380 extern struct gimple_opt_pass pass_fre;
 381 extern struct gimple_opt_pass pass_linear_transform;
 382 extern struct gimple_opt_pass pass_check_data_deps;
 383 extern struct gimple_opt_pass pass_copy_prop;
 384 extern struct gimple_opt_pass pass_vrp;
 385 extern struct gimple_opt_pass pass_uncprop;
 386 extern struct gimple_opt_pass pass_return_slot;
 387 extern struct gimple_opt_pass pass_reassoc;
 388 extern struct gimple_opt_pass pass_rebuild_cgraph_edges;
 389 extern struct gimple_opt_pass pass_build_cgraph_edges;
 390 extern struct gimple_opt_pass pass_reset_cc_flags;
 391
 392 /* IPA Passes */
 393 extern struct ipa_opt_pass pass_ipa_inline;
 394 extern struct ipa_opt_pass pass_ipa_cp;
 395 extern struct ipa_opt_pass pass_ipa_reference;
 396 extern struct ipa_opt_pass pass_ipa_pure_const;
 397
 398 extern struct simple_ipa_opt_pass pass_ipa_matrix_reorg;
 399 extern struct simple_ipa_opt_pass pass_ipa_early_inline;
 400 extern struct simple_ipa_opt_pass pass_ipa_type_escape;
 401 extern struct simple_ipa_opt_pass pass_ipa_pta;
 402 extern struct simple_ipa_opt_pass pass_ipa_struct_reorg;
 403 extern struct simple_ipa_opt_pass pass_early_local_passes;
 404 extern struct simple_ipa_opt_pass pass_ipa_increase_alignment;
 405 extern struct simple_ipa_opt_pass pass_ipa_function_and_variable_visibility;
 406
 407 extern struct gimple_opt_pass pass_all_optimizations;
 408 extern struct gimple_opt_pass pass_cleanup_cfg_post_optimizing;
 409 extern struct gimple_opt_pass pass_free_cfg_annotations;
 410 extern struct gimple_opt_pass pass_free_datastructures;
 411 extern struct gimple_opt_pass pass_init_datastructures;
 412 extern struct gimple_opt_pass pass_fixup_cfg;
 413
 414 extern struct rtl_opt_pass pass_expand;
 415 extern struct rtl_opt_pass pass_init_function;
 416 extern struct rtl_opt_pass pass_jump;
 417 extern struct rtl_opt_pass pass_rtl_eh;
 418 extern struct rtl_opt_pass pass_initial_value_sets;
 419 extern struct rtl_opt_pass pass_unshare_all_rtl;
 420 extern struct rtl_opt_pass pass_instantiate_virtual_regs;
 421 extern struct rtl_opt_pass pass_rtl_fwprop;
 422 extern struct rtl_opt_pass pass_rtl_fwprop_addr;
 423 extern struct rtl_opt_pass pass_jump2;
 424 extern struct rtl_opt_pass pass_lower_subreg;
 425 extern struct rtl_opt_pass pass_cse;
 426 extern struct rtl_opt_pass pass_fast_rtl_dce;
 427 extern struct rtl_opt_pass pass_ud_rtl_dce;
 428 extern struct rtl_opt_pass pass_rtl_dce;
 429 extern struct rtl_opt_pass pass_rtl_dse1;
 430 extern struct rtl_opt_pass pass_rtl_dse2;
 431 extern struct rtl_opt_pass pass_rtl_dse3;
 432 extern struct rtl_opt_pass pass_gcse;
 433 extern struct rtl_opt_pass pass_jump_bypass;
 434 extern struct rtl_opt_pass pass_profiling;
 435 extern struct rtl_opt_pass pass_rtl_ifcvt;
 436 extern struct gimple_opt_pass pass_tracer;
 437
 438 extern struct rtl_opt_pass pass_into_cfg_layout_mode;
 439 extern struct rtl_opt_pass pass_outof_cfg_layout_mode;
 440
 441 extern struct rtl_opt_pass pass_loop2;
 442 extern struct rtl_opt_pass pass_rtl_loop_init;
 443 extern struct rtl_opt_pass pass_rtl_move_loop_invariants;
 444 extern struct rtl_opt_pass pass_rtl_unswitch;
 445 extern struct rtl_opt_pass pass_rtl_unroll_and_peel_loops;
 446 extern struct rtl_opt_pass pass_rtl_doloop;
 447 extern struct rtl_opt_pass pass_rtl_loop_done;
 448
 449 extern struct rtl_opt_pass pass_web;
 450 extern struct rtl_opt_pass pass_cse2;
 451 extern struct rtl_opt_pass pass_df_initialize_opt;
 452 extern struct rtl_opt_pass pass_df_initialize_no_opt;
 453 extern struct rtl_opt_pass pass_reginfo_init;
 454 extern struct rtl_opt_pass pass_subregs_of_mode_init;
 455 extern struct rtl_opt_pass pass_subregs_of_mode_finish;
 456 extern struct rtl_opt_pass pass_inc_dec;
 457 extern struct rtl_opt_pass pass_stack_ptr_mod;
 458 extern struct rtl_opt_pass pass_initialize_regs;
 459 extern struct rtl_opt_pass pass_combine;
 460 extern struct rtl_opt_pass pass_if_after_combine;
 461 extern struct rtl_opt_pass pass_partition_blocks;
 462 extern struct rtl_opt_pass pass_match_asm_constraints;
 463 extern struct rtl_opt_pass pass_regmove;
 464 extern struct rtl_opt_pass pass_split_all_insns;
 465 extern struct rtl_opt_pass pass_fast_rtl_byte_dce;
 466 extern struct rtl_opt_pass pass_lower_subreg2;
 467 extern struct rtl_opt_pass pass_mode_switching;
 468 extern struct rtl_opt_pass pass_see;
 469 extern struct rtl_opt_pass pass_sms;
 470 extern struct rtl_opt_pass pass_sched;
 471 extern struct rtl_opt_pass pass_ira;
 472 extern struct rtl_opt_pass pass_postreload;
 473 extern struct rtl_opt_pass pass_clean_state;
 474 extern struct rtl_opt_pass pass_branch_prob;
 475 extern struct rtl_opt_pass pass_value_profile_transformations;
 476 extern struct rtl_opt_pass pass_postreload_cse;
 477 extern struct rtl_opt_pass pass_gcse2;
 478 extern struct rtl_opt_pass pass_split_after_reload;
 479 extern struct rtl_opt_pass pass_branch_target_load_optimize1;
 480 extern struct rtl_opt_pass pass_thread_prologue_and_epilogue;
 481 extern struct rtl_opt_pass pass_stack_adjustments;
 482 extern struct rtl_opt_pass pass_peephole2;
 483 extern struct rtl_opt_pass pass_if_after_reload;
 484 extern struct rtl_opt_pass pass_regrename;
 485 extern struct rtl_opt_pass pass_cprop_hardreg;
 486 extern struct rtl_opt_pass pass_reorder_blocks;
 487 extern struct rtl_opt_pass pass_branch_target_load_optimize2;
 488 extern struct rtl_opt_pass pass_leaf_regs;
 489 extern struct rtl_opt_pass pass_split_before_sched2;
 490 extern struct rtl_opt_pass pass_sched2;
 491 extern struct rtl_opt_pass pass_stack_regs;
 492 extern struct rtl_opt_pass pass_stack_regs_run;
 493 extern struct rtl_opt_pass pass_df_finish;
 494 extern struct rtl_opt_pass pass_compute_alignments;
 495 extern struct rtl_opt_pass pass_duplicate_computed_gotos;
 496 extern struct rtl_opt_pass pass_variable_tracking;
 497 extern struct rtl_opt_pass pass_free_cfg;
 498 extern struct rtl_opt_pass pass_machine_reorg;
 499 extern struct rtl_opt_pass pass_cleanup_barriers;
 500 extern struct rtl_opt_pass pass_delay_slots;
 501 extern struct rtl_opt_pass pass_split_for_shorten_branches;
 502 extern struct rtl_opt_pass pass_split_before_regstack;
 503 extern struct rtl_opt_pass pass_convert_to_eh_region_ranges;
 504 extern struct rtl_opt_pass pass_shorten_branches;
 505 extern struct rtl_opt_pass pass_set_nothrow_function_flags;
 506 extern struct rtl_opt_pass pass_final;
 507 extern struct rtl_opt_pass pass_rtl_seqabstr;
 508 extern struct gimple_opt_pass pass_release_ssa_names;
 509 extern struct gimple_opt_pass pass_early_inline;
 510 extern struct gimple_opt_pass pass_inline_parameters;
 511 extern struct gimple_opt_pass pass_all_early_optimizations;
 512 extern struct gimple_opt_pass pass_update_address_taken;
 513 extern struct gimple_opt_pass pass_convert_switch;
 514
 515 /* The root of the compilation pass tree, once constructed.  */
 516 extern struct opt_pass *all_passes, *all_ipa_passes, *all_lowering_passes;
 517
 518 /* Current optimization pass.  */
 519 extern struct opt_pass *current_pass;
 520
 521 extern struct opt_pass * get_pass_for_id (int);
 522 extern void execute_pass_list (struct opt_pass *);
 523 extern void execute_ipa_pass_list (struct opt_pass *);
 524 extern void print_current_pass (FILE *);
 525 extern void debug_pass (void);
 526
 527 /* Set to true if the pass is called the first time during compilation of the
 528    current function.  Note that using this information in the optimization
 529    passes is considered not to be clean, and it should be avoided if possible.
 530    This flag is currently used to prevent loops from being peeled repeatedly
 531    in jump threading; it will be removed once we preserve loop structures
 532    throughout the compilation -- we will be able to mark the affected loops
 533    directly in jump threading, and avoid peeling them next time.  */
 534 extern bool first_pass_instance;
 535
 536 #endif /* GCC_TREE_PASS_H */