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 #include "timevar.h"
  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 /* In tree-dump.c */
  79
  80 extern char *get_dump_file_name (int);
  81 extern int dump_enabled_p (int);
  82 extern int dump_initialized_p (int);
  83 extern FILE *dump_begin (int, int *);
  84 extern void dump_end (int, FILE *);
  85 extern void dump_node (const_tree, int, FILE *);
  86 extern int dump_switch_p (const char *);
  87 extern const char *dump_flag_name (int);
  88
  89 /* Global variables used to communicate with passes.  */
  90 extern FILE *dump_file;
  91 extern int dump_flags;
  92 extern const char *dump_file_name;
  93
  94 /* Return the dump_file_info for the given phase.  */
  95 extern struct dump_file_info *get_dump_file_info (int);
  96
  97 /* Describe one pass; this is the common part shared across different pass
  98    types.  */
  99 struct opt_pass
 100 {
 101   /* Optimization pass type.  */
 102   enum opt_pass_type {
 103     GIMPLE_PASS,
 104     RTL_PASS,
 105     SIMPLE_IPA_PASS,
 106     IPA_PASS
 107   } type;
 108   /* Terse name of the pass used as a fragment of the dump file
 109      name.  If the name starts with a star, no dump happens. */
 110   const char *name;
 111
 112   /* If non-null, this pass and all sub-passes are executed only if
 113      the function returns true.  */
 114   bool (*gate) (void);
 115
 116   /* This is the code to run.  If null, then there should be sub-passes
 117      otherwise this pass does nothing.  The return value contains
 118      TODOs to execute in addition to those in TODO_flags_finish.   */
 119   unsigned int (*execute) (void);
 120
 121   /* A list of sub-passes to run, dependent on gate predicate.  */
 122   struct opt_pass *sub;
 123
 124   /* Next in the list of passes to run, independent of gate predicate.  */
 125   struct opt_pass *next;
 126
 127   /* Static pass number, used as a fragment of the dump file name.  */
 128   int static_pass_number;
 129
 130   /* The timevar id associated with this pass.  */
 131   /* ??? Ideally would be dynamically assigned.  */
 132   timevar_id_t tv_id;
 133
 134   /* Sets of properties input and output from this pass.  */
 135   unsigned int properties_required;
 136   unsigned int properties_provided;
 137   unsigned int properties_destroyed;
 138
 139   /* Flags indicating common sets things to do before and after.  */
 140   unsigned int todo_flags_start;
 141   unsigned int todo_flags_finish;
 142 };
 143
 144 /* Description of GIMPLE pass.  */
 145 struct gimple_opt_pass
 146 {
 147   struct opt_pass pass;
 148 };
 149
 150 /* Description of RTL pass.  */
 151 struct rtl_opt_pass
 152 {
 153   struct opt_pass pass;
 154 };
 155
 156 struct varpool_node;
 157 struct cgraph_node;
 158 struct cgraph_node_set_def;
 159
 160 /* Description of IPA pass with generate summary, write, execute, read and
 161    transform stages.  */
 162 struct ipa_opt_pass
 163 {
 164   struct opt_pass pass;
 165
 166   /* IPA passes can analyze function body and variable initializers
 167       using this hook and produce summary.  */
 168   void (*generate_summary) (void);
 169
 170   /* This hook is used to serialize IPA summaries on disk.  */
 171   void (*write_summary) (struct cgraph_node_set_def *);
 172
 173   /* For most ipa passes, the information can only be deserialized in
 174      one chunk.  However, function bodies are read function at a time
 175      as needed so both calls are necessary.  */
 176   void (*read_summary) (void);
 177   void (*function_read_summary) (struct cgraph_node *);
 178
 179   /* Results of interprocedural propagation of an IPA pass is applied to
 180      function body via this hook.  */
 181   unsigned int function_transform_todo_flags_start;
 182   unsigned int (*function_transform) (struct cgraph_node *);
 183   void (*variable_transform) (struct varpool_node *);
 184 };
 185
 186 /* Description of simple IPA pass.  Simple IPA passes have just one execute
 187    hook.  */
 188 struct simple_ipa_opt_pass
 189 {
 190   struct opt_pass pass;
 191 };
 192
 193 /* Define a tree dump switch.  */
 194 struct dump_file_info
 195 {
 196   const char *suffix;           /* suffix to give output file.  */
 197   const char *swtch;            /* command line switch */
 198   const char *glob;             /* command line glob  */
 199   int flags;                    /* user flags */
 200   int state;                    /* state of play */
 201   int num;                      /* dump file number */
 202 };
 203
 204 /* Pass properties.  */
 205 #define PROP_gimple_any         (1 << 0)        /* entire gimple grammar */
 206 #define PROP_gimple_lcf         (1 << 1)        /* lowered control flow */
 207 #define PROP_gimple_leh         (1 << 2)        /* lowered eh */
 208 #define PROP_cfg                (1 << 3)
 209 #define PROP_referenced_vars    (1 << 4)
 210 #define PROP_ssa                (1 << 5)
 211 #define PROP_no_crit_edges      (1 << 6)
 212 #define PROP_rtl                (1 << 7)
 213 #define PROP_alias              (1 << 8)
 214 #define PROP_gimple_lomp        (1 << 9)        /* lowered OpenMP directives */
 215 #define PROP_cfglayout          (1 << 10)       /* cfglayout mode on RTL */
 216
 217 #define PROP_trees \
 218   (PROP_gimple_any | PROP_gimple_lcf | PROP_gimple_leh | PROP_gimple_lomp)
 219
 220 /* To-do flags.  */
 221 #define TODO_dump_func                  (1 << 0)
 222 #define TODO_ggc_collect                (1 << 1)
 223 #define TODO_verify_ssa                 (1 << 2)
 224 #define TODO_verify_flow                (1 << 3)
 225 #define TODO_verify_stmts               (1 << 4)
 226 #define TODO_cleanup_cfg                (1 << 5)
 227 #define TODO_verify_loops               (1 << 6)
 228 #define TODO_dump_cgraph                (1 << 7)
 229 #define TODO_remove_functions           (1 << 8)
 230 #define TODO_rebuild_frequencies        (1 << 9)
 231 #define TODO_verify_rtl_sharing         (1 << 10)
 232
 233 /* To-do flags for calls to update_ssa.  */
 234
 235 /* Update the SSA form inserting PHI nodes for newly exposed symbols
 236    and virtual names marked for updating.  When updating real names,
 237    only insert PHI nodes for a real name O_j in blocks reached by all
 238    the new and old definitions for O_j.  If the iterated dominance
 239    frontier for O_j is not pruned, we may end up inserting PHI nodes
 240    in blocks that have one or more edges with no incoming definition
 241    for O_j.  This would lead to uninitialized warnings for O_j's
 242    symbol.  */
 243 #define TODO_update_ssa                 (1 << 11)
 244
 245 /* Update the SSA form without inserting any new PHI nodes at all.
 246    This is used by passes that have either inserted all the PHI nodes
 247    themselves or passes that need only to patch use-def and def-def
 248    chains for virtuals (e.g., DCE).  */
 249 #define TODO_update_ssa_no_phi          (1 << 12)
 250
 251 /* Insert PHI nodes everywhere they are needed.  No pruning of the
 252    IDF is done.  This is used by passes that need the PHI nodes for
 253    O_j even if it means that some arguments will come from the default
 254    definition of O_j's symbol (e.g., pass_linear_transform).
 255
 256    WARNING: If you need to use this flag, chances are that your pass
 257    may be doing something wrong.  Inserting PHI nodes for an old name
 258    where not all edges carry a new replacement may lead to silent
 259    codegen errors or spurious uninitialized warnings.  */
 260 #define TODO_update_ssa_full_phi        (1 << 13)
 261
 262 /* Passes that update the SSA form on their own may want to delegate
 263    the updating of virtual names to the generic updater.  Since FUD
 264    chains are easier to maintain, this simplifies the work they need
 265    to do.  NOTE: If this flag is used, any OLD->NEW mappings for real
 266    names are explicitly destroyed and only the symbols marked for
 267    renaming are processed.  */
 268 #define TODO_update_ssa_only_virtuals   (1 << 14)
 269
 270 /* Some passes leave unused local variables that can be removed from
 271    cfun->local_decls.  This reduces the size of dump files
 272    and the memory footprint for VAR_DECLs.  */
 273 #define TODO_remove_unused_locals       (1 << 15)
 274
 275 /* Internally used for the first in a sequence of passes.  It is set
 276    for the passes that are handed to register_dump_files.  */
 277 #define TODO_set_props                  (1 << 16)
 278
 279 /* Call df_finish at the end of the pass.  This is done after all of
 280    the dumpers have been allowed to run so that they have access to
 281    the instance before it is destroyed.  */
 282 #define TODO_df_finish                  (1 << 17)
 283
 284 /* Call df_verify at the end of the pass if checking is enabled.  */
 285 #define TODO_df_verify                  (1 << 18)
 286
 287 /* Internally used for the first instance of a pass.  */
 288 #define TODO_mark_first_instance        (1 << 19)
 289
 290 /* Rebuild aliasing info.  */
 291 #define TODO_rebuild_alias              (1 << 20)
 292
 293 /* Rebuild the addressable-vars bitmap and do register promotion.  */
 294 #define TODO_update_address_taken       (1 << 21)
 295
 296 #define TODO_update_ssa_any             \
 297     (TODO_update_ssa                    \
 298      | TODO_update_ssa_no_phi           \
 299      | TODO_update_ssa_full_phi         \
 300      | TODO_update_ssa_only_virtuals)
 301
 302 #define TODO_verify_all \
 303   (TODO_verify_ssa | TODO_verify_flow | TODO_verify_stmts)
 304
 305 extern void tree_lowering_passes (tree decl);
 306
 307 extern struct gimple_opt_pass pass_mudflap_1;
 308 extern struct gimple_opt_pass pass_mudflap_2;
 309 extern struct gimple_opt_pass pass_remove_useless_stmts;
 310 extern struct gimple_opt_pass pass_lower_cf;
 311 extern struct gimple_opt_pass pass_refactor_eh;
 312 extern struct gimple_opt_pass pass_lower_eh;
 313 extern struct gimple_opt_pass pass_build_cfg;
 314 extern struct gimple_opt_pass pass_tree_profile;
 315 extern struct gimple_opt_pass pass_early_tree_profile;
 316 extern struct gimple_opt_pass pass_cleanup_cfg;
 317 extern struct gimple_opt_pass pass_referenced_vars;
 318 extern struct gimple_opt_pass pass_cleanup_eh;
 319 extern struct gimple_opt_pass pass_fixup_cfg;
 320 extern struct gimple_opt_pass pass_sra;
 321 extern struct gimple_opt_pass pass_sra_early;
 322 extern struct gimple_opt_pass pass_tail_recursion;
 323 extern struct gimple_opt_pass pass_tail_calls;
 324 extern struct gimple_opt_pass pass_tree_loop;
 325 extern struct gimple_opt_pass pass_tree_loop_init;
 326 extern struct gimple_opt_pass pass_lim;
 327 extern struct gimple_opt_pass pass_tree_unswitch;
 328 extern struct gimple_opt_pass pass_predcom;
 329 extern struct gimple_opt_pass pass_iv_canon;
 330 extern struct gimple_opt_pass pass_scev_cprop;
 331 extern struct gimple_opt_pass pass_empty_loop;
 332 extern struct gimple_opt_pass pass_record_bounds;
 333 extern struct gimple_opt_pass pass_graphite_transforms;
 334 extern struct gimple_opt_pass pass_if_conversion;
 335 extern struct gimple_opt_pass pass_loop_distribution;
 336 extern struct gimple_opt_pass pass_vectorize;
 337 extern struct gimple_opt_pass pass_complete_unroll;
 338 extern struct gimple_opt_pass pass_complete_unrolli;
 339 extern struct gimple_opt_pass pass_parallelize_loops;
 340 extern struct gimple_opt_pass pass_loop_prefetch;
 341 extern struct gimple_opt_pass pass_iv_optimize;
 342 extern struct gimple_opt_pass pass_tree_loop_done;
 343 extern struct gimple_opt_pass pass_ch;
 344 extern struct gimple_opt_pass pass_ccp;
 345 extern struct gimple_opt_pass pass_phi_only_cprop;
 346 extern struct gimple_opt_pass pass_build_ssa;
 347 extern struct gimple_opt_pass pass_build_alias;
 348 extern struct gimple_opt_pass pass_dominator;
 349 extern struct gimple_opt_pass pass_dce;
 350 extern struct gimple_opt_pass pass_dce_loop;
 351 extern struct gimple_opt_pass pass_cd_dce;
 352 extern struct gimple_opt_pass pass_call_cdce;
 353 extern struct gimple_opt_pass pass_merge_phi;
 354 extern struct gimple_opt_pass pass_split_crit_edges;
 355 extern struct gimple_opt_pass pass_pre;
 356 extern struct gimple_opt_pass pass_profile;
 357 extern struct gimple_opt_pass pass_strip_predict_hints;
 358 extern struct gimple_opt_pass pass_lower_complex_O0;
 359 extern struct gimple_opt_pass pass_lower_complex;
 360 extern struct gimple_opt_pass pass_lower_vector;
 361 extern struct gimple_opt_pass pass_lower_vector_ssa;
 362 extern struct gimple_opt_pass pass_lower_omp;
 363 extern struct gimple_opt_pass pass_expand_omp;
 364 extern struct gimple_opt_pass pass_expand_omp_ssa;
 365 extern struct gimple_opt_pass pass_object_sizes;
 366 extern struct gimple_opt_pass pass_fold_builtins;
 367 extern struct gimple_opt_pass pass_stdarg;
 368 extern struct gimple_opt_pass pass_early_warn_uninitialized;
 369 extern struct gimple_opt_pass pass_late_warn_uninitialized;
 370 extern struct gimple_opt_pass pass_cse_reciprocals;
 371 extern struct gimple_opt_pass pass_cse_sincos;
 372 extern struct gimple_opt_pass pass_convert_to_rsqrt;
 373 extern struct gimple_opt_pass pass_warn_function_return;
 374 extern struct gimple_opt_pass pass_warn_function_noreturn;
 375 extern struct gimple_opt_pass pass_cselim;
 376 extern struct gimple_opt_pass pass_phiopt;
 377 extern struct gimple_opt_pass pass_forwprop;
 378 extern struct gimple_opt_pass pass_phiprop;
 379 extern struct gimple_opt_pass pass_tree_ifcombine;
 380 extern struct gimple_opt_pass pass_dse;
 381 extern struct gimple_opt_pass pass_nrv;
 382 extern struct gimple_opt_pass pass_rename_ssa_copies;
 383 extern struct gimple_opt_pass pass_rest_of_compilation;
 384 extern struct gimple_opt_pass pass_sink_code;
 385 extern struct gimple_opt_pass pass_fre;
 386 extern struct gimple_opt_pass pass_linear_transform;
 387 extern struct gimple_opt_pass pass_check_data_deps;
 388 extern struct gimple_opt_pass pass_copy_prop;
 389 extern struct gimple_opt_pass pass_vrp;
 390 extern struct gimple_opt_pass pass_uncprop;
 391 extern struct gimple_opt_pass pass_return_slot;
 392 extern struct gimple_opt_pass pass_reassoc;
 393 extern struct gimple_opt_pass pass_rebuild_cgraph_edges;
 394 extern struct gimple_opt_pass pass_remove_cgraph_callee_edges;
 395 extern struct gimple_opt_pass pass_build_cgraph_edges;
 396 extern struct gimple_opt_pass pass_local_pure_const;
 397 extern struct gimple_opt_pass pass_tracer;
 398
 399 /* IPA Passes */
 400 extern struct ipa_opt_pass pass_ipa_inline;
 401 extern struct ipa_opt_pass pass_ipa_cp;
 402 extern struct ipa_opt_pass pass_ipa_reference;
 403 extern struct ipa_opt_pass pass_ipa_pure_const;
 404
 405 extern struct simple_ipa_opt_pass pass_ipa_matrix_reorg;
 406 extern struct simple_ipa_opt_pass pass_ipa_early_inline;
 407 extern struct simple_ipa_opt_pass pass_ipa_type_escape;
 408 extern struct simple_ipa_opt_pass pass_ipa_pta;
 409 extern struct simple_ipa_opt_pass pass_ipa_struct_reorg;
 410 extern struct simple_ipa_opt_pass pass_early_local_passes;
 411 extern struct simple_ipa_opt_pass pass_ipa_increase_alignment;
 412 extern struct simple_ipa_opt_pass pass_ipa_function_and_variable_visibility;
 413
 414 extern struct gimple_opt_pass pass_all_optimizations;
 415 extern struct gimple_opt_pass pass_cleanup_cfg_post_optimizing;
 416 extern struct gimple_opt_pass pass_init_datastructures;
 417 extern struct gimple_opt_pass pass_fixup_cfg;
 418
 419 extern struct rtl_opt_pass pass_expand;
 420 extern struct rtl_opt_pass pass_init_function;
 421 extern struct rtl_opt_pass pass_jump;
 422 extern struct rtl_opt_pass pass_rtl_eh;
 423 extern struct rtl_opt_pass pass_initial_value_sets;
 424 extern struct rtl_opt_pass pass_unshare_all_rtl;
 425 extern struct rtl_opt_pass pass_instantiate_virtual_regs;
 426 extern struct rtl_opt_pass pass_rtl_fwprop;
 427 extern struct rtl_opt_pass pass_rtl_fwprop_addr;
 428 extern struct rtl_opt_pass pass_jump2;
 429 extern struct rtl_opt_pass pass_lower_subreg;
 430 extern struct rtl_opt_pass pass_cse;
 431 extern struct rtl_opt_pass pass_fast_rtl_dce;
 432 extern struct rtl_opt_pass pass_ud_rtl_dce;
 433 extern struct rtl_opt_pass pass_rtl_dce;
 434 extern struct rtl_opt_pass pass_rtl_dse1;
 435 extern struct rtl_opt_pass pass_rtl_dse2;
 436 extern struct rtl_opt_pass pass_rtl_dse3;
 437 extern struct rtl_opt_pass pass_rtl_cprop;
 438 extern struct rtl_opt_pass pass_rtl_pre;
 439 extern struct rtl_opt_pass pass_rtl_hoist;
 440 extern struct rtl_opt_pass pass_rtl_store_motion;
 441 extern struct rtl_opt_pass pass_cse_after_global_opts;
 442 extern struct rtl_opt_pass pass_rtl_ifcvt;
 443
 444 extern struct rtl_opt_pass pass_into_cfg_layout_mode;
 445 extern struct rtl_opt_pass pass_outof_cfg_layout_mode;
 446
 447 extern struct rtl_opt_pass pass_loop2;
 448 extern struct rtl_opt_pass pass_rtl_loop_init;
 449 extern struct rtl_opt_pass pass_rtl_move_loop_invariants;
 450 extern struct rtl_opt_pass pass_rtl_unswitch;
 451 extern struct rtl_opt_pass pass_rtl_unroll_and_peel_loops;
 452 extern struct rtl_opt_pass pass_rtl_doloop;
 453 extern struct rtl_opt_pass pass_rtl_loop_done;
 454
 455 extern struct rtl_opt_pass pass_web;
 456 extern struct rtl_opt_pass pass_cse2;
 457 extern struct rtl_opt_pass pass_df_initialize_opt;
 458 extern struct rtl_opt_pass pass_df_initialize_no_opt;
 459 extern struct rtl_opt_pass pass_reginfo_init;
 460 extern struct rtl_opt_pass pass_subregs_of_mode_init;
 461 extern struct rtl_opt_pass pass_subregs_of_mode_finish;
 462 extern struct rtl_opt_pass pass_inc_dec;
 463 extern struct rtl_opt_pass pass_stack_ptr_mod;
 464 extern struct rtl_opt_pass pass_initialize_regs;
 465 extern struct rtl_opt_pass pass_combine;
 466 extern struct rtl_opt_pass pass_if_after_combine;
 467 extern struct rtl_opt_pass pass_partition_blocks;
 468 extern struct rtl_opt_pass pass_match_asm_constraints;
 469 extern struct rtl_opt_pass pass_regmove;
 470 extern struct rtl_opt_pass pass_split_all_insns;
 471 extern struct rtl_opt_pass pass_fast_rtl_byte_dce;
 472 extern struct rtl_opt_pass pass_lower_subreg2;
 473 extern struct rtl_opt_pass pass_mode_switching;
 474 extern struct rtl_opt_pass pass_see;
 475 extern struct rtl_opt_pass pass_sms;
 476 extern struct rtl_opt_pass pass_sched;
 477 extern struct rtl_opt_pass pass_ira;
 478 extern struct rtl_opt_pass pass_postreload;
 479 extern struct rtl_opt_pass pass_clean_state;
 480 extern struct rtl_opt_pass pass_branch_prob;
 481 extern struct rtl_opt_pass pass_value_profile_transformations;
 482 extern struct rtl_opt_pass pass_postreload_cse;
 483 extern struct rtl_opt_pass pass_gcse2;
 484 extern struct rtl_opt_pass pass_split_after_reload;
 485 extern struct rtl_opt_pass pass_branch_target_load_optimize1;
 486 extern struct rtl_opt_pass pass_thread_prologue_and_epilogue;
 487 extern struct rtl_opt_pass pass_stack_adjustments;
 488 extern struct rtl_opt_pass pass_peephole2;
 489 extern struct rtl_opt_pass pass_if_after_reload;
 490 extern struct rtl_opt_pass pass_regrename;
 491 extern struct rtl_opt_pass pass_cprop_hardreg;
 492 extern struct rtl_opt_pass pass_reorder_blocks;
 493 extern struct rtl_opt_pass pass_branch_target_load_optimize2;
 494 extern struct rtl_opt_pass pass_leaf_regs;
 495 extern struct rtl_opt_pass pass_split_before_sched2;
 496 extern struct rtl_opt_pass pass_sched2;
 497 extern struct rtl_opt_pass pass_stack_regs;
 498 extern struct rtl_opt_pass pass_stack_regs_run;
 499 extern struct rtl_opt_pass pass_df_finish;
 500 extern struct rtl_opt_pass pass_compute_alignments;
 501 extern struct rtl_opt_pass pass_duplicate_computed_gotos;
 502 extern struct rtl_opt_pass pass_variable_tracking;
 503 extern struct rtl_opt_pass pass_free_cfg;
 504 extern struct rtl_opt_pass pass_machine_reorg;
 505 extern struct rtl_opt_pass pass_cleanup_barriers;
 506 extern struct rtl_opt_pass pass_delay_slots;
 507 extern struct rtl_opt_pass pass_split_for_shorten_branches;
 508 extern struct rtl_opt_pass pass_split_before_regstack;
 509 extern struct rtl_opt_pass pass_convert_to_eh_region_ranges;
 510 extern struct rtl_opt_pass pass_shorten_branches;
 511 extern struct rtl_opt_pass pass_set_nothrow_function_flags;
 512 extern struct rtl_opt_pass pass_final;
 513 extern struct rtl_opt_pass pass_rtl_seqabstr;
 514 extern struct gimple_opt_pass pass_release_ssa_names;
 515 extern struct gimple_opt_pass pass_early_inline;
 516 extern struct gimple_opt_pass pass_inline_parameters;
 517 extern struct gimple_opt_pass pass_all_early_optimizations;
 518 extern struct gimple_opt_pass pass_update_address_taken;
 519 extern struct gimple_opt_pass pass_convert_switch;
 520
 521 /* The root of the compilation pass tree, once constructed.  */
 522 extern struct opt_pass *all_passes, *all_ipa_passes, *all_lowering_passes;
 523
 524 /* Current optimization pass.  */
 525 extern struct opt_pass *current_pass;
 526
 527 extern struct opt_pass * get_pass_for_id (int);
 528 extern void execute_pass_list (struct opt_pass *);
 529 extern void execute_ipa_pass_list (struct opt_pass *);
 530 extern void print_current_pass (FILE *);
 531 extern void debug_pass (void);
 532 extern void register_one_dump_file (struct opt_pass *);
 533 extern bool function_called_by_processed_nodes_p (void);
 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 #endif /* GCC_TREE_PASS_H */