gcc/tree-pass.h

   1 /* Definitions for describing one tree-ssa optimization pass.
   2    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010
   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 #define TDF_ASMNAME     (1 << 18)       /* display asm names of decls  */
  79 #define TDF_EH          (1 << 19)       /* display EH region number
  80                                            holding this gimple statement.  */
  81
  82 #define TDF_NOUID       (1 << 20)       /* omit UIDs from dumps.  */
  83
  84 /* In tree-dump.c */
  85
  86 extern char *get_dump_file_name (int);
  87 extern int dump_enabled_p (int);
  88 extern int dump_initialized_p (int);
  89 extern FILE *dump_begin (int, int *);
  90 extern void dump_end (int, FILE *);
  91 extern void dump_node (const_tree, int, FILE *);
  92 extern int dump_switch_p (const char *);
  93 extern const char *dump_flag_name (int);
  94
  95 /* Global variables used to communicate with passes.  */
  96 extern FILE *dump_file;
  97 extern int dump_flags;
  98 extern const char *dump_file_name;
  99
 100 /* Return the dump_file_info for the given phase.  */
 101 extern struct dump_file_info *get_dump_file_info (int);
 102
 103 /* Optimization pass type.  */
 104 enum opt_pass_type
 105 {
 106   GIMPLE_PASS,
 107   RTL_PASS,
 108   SIMPLE_IPA_PASS,
 109   IPA_PASS
 110 };
 111
 112 /* Describe one pass; this is the common part shared across different pass
 113    types.  */
 114 struct opt_pass
 115 {
 116   /* Optimization pass type.  */
 117   enum opt_pass_type type;
 118
 119   /* Terse name of the pass used as a fragment of the dump file
 120      name.  If the name starts with a star, no dump happens. */
 121   const char *name;
 122
 123   /* If non-null, this pass and all sub-passes are executed only if
 124      the function returns true.  */
 125   bool (*gate) (void);
 126
 127   /* This is the code to run.  If null, then there should be sub-passes
 128      otherwise this pass does nothing.  The return value contains
 129      TODOs to execute in addition to those in TODO_flags_finish.   */
 130   unsigned int (*execute) (void);
 131
 132   /* A list of sub-passes to run, dependent on gate predicate.  */
 133   struct opt_pass *sub;
 134
 135   /* Next in the list of passes to run, independent of gate predicate.  */
 136   struct opt_pass *next;
 137
 138   /* Static pass number, used as a fragment of the dump file name.  */
 139   int static_pass_number;
 140
 141   /* The timevar id associated with this pass.  */
 142   /* ??? Ideally would be dynamically assigned.  */
 143   timevar_id_t tv_id;
 144
 145   /* Sets of properties input and output from this pass.  */
 146   unsigned int properties_required;
 147   unsigned int properties_provided;
 148   unsigned int properties_destroyed;
 149
 150   /* Flags indicating common sets things to do before and after.  */
 151   unsigned int todo_flags_start;
 152   unsigned int todo_flags_finish;
 153 };
 154
 155 /* Description of GIMPLE pass.  */
 156 struct gimple_opt_pass
 157 {
 158   struct opt_pass pass;
 159 };
 160
 161 /* Description of RTL pass.  */
 162 struct rtl_opt_pass
 163 {
 164   struct opt_pass pass;
 165 };
 166
 167 struct varpool_node;
 168 struct cgraph_node;
 169 struct cgraph_node_set_def;
 170
 171 /* Description of IPA pass with generate summary, write, execute, read and
 172    transform stages.  */
 173 struct ipa_opt_pass_d
 174 {
 175   struct opt_pass pass;
 176
 177   /* IPA passes can analyze function body and variable initializers
 178       using this hook and produce summary.  */
 179   void (*generate_summary) (void);
 180
 181   /* This hook is used to serialize IPA summaries on disk.  */
 182   void (*write_summary) (struct cgraph_node_set_def *);
 183
 184   /* For most ipa passes, the information can only be deserialized in
 185      one chunk.  However, function bodies are read function at a time
 186      as needed so both calls are necessary.  */
 187   void (*read_summary) (void);
 188   void (*function_read_summary) (struct cgraph_node *);
 189   /* Hook to convert gimple stmt uids into true gimple statements.  The second
 190      parameter is an array of statements indexed by their uid. */
 191   void (*stmt_fixup) (struct cgraph_node *, gimple *);
 192
 193   /* Results of interprocedural propagation of an IPA pass is applied to
 194      function body via this hook.  */
 195   unsigned int function_transform_todo_flags_start;
 196   unsigned int (*function_transform) (struct cgraph_node *);
 197   void (*variable_transform) (struct varpool_node *);
 198 };
 199
 200 /* Description of simple IPA pass.  Simple IPA passes have just one execute
 201    hook.  */
 202 struct simple_ipa_opt_pass
 203 {
 204   struct opt_pass pass;
 205 };
 206
 207 /* Define a tree dump switch.  */
 208 struct dump_file_info
 209 {
 210   const char *suffix;           /* suffix to give output file.  */
 211   const char *swtch;            /* command line switch */
 212   const char *glob;             /* command line glob  */
 213   int flags;                    /* user flags */
 214   int state;                    /* state of play */
 215   int num;                      /* dump file number */
 216 };
 217
 218 /* Pass properties.  */
 219 #define PROP_gimple_any         (1 << 0)        /* entire gimple grammar */
 220 #define PROP_gimple_lcf         (1 << 1)        /* lowered control flow */
 221 #define PROP_gimple_leh         (1 << 2)        /* lowered eh */
 222 #define PROP_cfg                (1 << 3)
 223 #define PROP_referenced_vars    (1 << 4)
 224 #define PROP_ssa                (1 << 5)
 225 #define PROP_no_crit_edges      (1 << 6)
 226 #define PROP_rtl                (1 << 7)
 227 #define PROP_gimple_lomp        (1 << 8)        /* lowered OpenMP directives */
 228 #define PROP_cfglayout          (1 << 9)        /* cfglayout mode on RTL */
 229 #define PROP_gimple_lcx         (1 << 10)       /* lowered complex */
 230
 231 #define PROP_trees \
 232   (PROP_gimple_any | PROP_gimple_lcf | PROP_gimple_leh | PROP_gimple_lomp)
 233
 234 /* To-do flags.  */
 235 #define TODO_dump_func                  (1 << 0)
 236 #define TODO_ggc_collect                (1 << 1)
 237 #define TODO_verify_ssa                 (1 << 2)
 238 #define TODO_verify_flow                (1 << 3)
 239 #define TODO_verify_stmts               (1 << 4)
 240 #define TODO_cleanup_cfg                (1 << 5)
 241 #define TODO_verify_loops               (1 << 6)
 242 #define TODO_dump_cgraph                (1 << 7)
 243 #define TODO_remove_functions           (1 << 8)
 244 #define TODO_rebuild_frequencies        (1 << 9)
 245 #define TODO_verify_rtl_sharing         (1 << 10)
 246
 247 /* To-do flags for calls to update_ssa.  */
 248
 249 /* Update the SSA form inserting PHI nodes for newly exposed symbols
 250    and virtual names marked for updating.  When updating real names,
 251    only insert PHI nodes for a real name O_j in blocks reached by all
 252    the new and old definitions for O_j.  If the iterated dominance
 253    frontier for O_j is not pruned, we may end up inserting PHI nodes
 254    in blocks that have one or more edges with no incoming definition
 255    for O_j.  This would lead to uninitialized warnings for O_j's
 256    symbol.  */
 257 #define TODO_update_ssa                 (1 << 11)
 258
 259 /* Update the SSA form without inserting any new PHI nodes at all.
 260    This is used by passes that have either inserted all the PHI nodes
 261    themselves or passes that need only to patch use-def and def-def
 262    chains for virtuals (e.g., DCE).  */
 263 #define TODO_update_ssa_no_phi          (1 << 12)
 264
 265 /* Insert PHI nodes everywhere they are needed.  No pruning of the
 266    IDF is done.  This is used by passes that need the PHI nodes for
 267    O_j even if it means that some arguments will come from the default
 268    definition of O_j's symbol (e.g., pass_linear_transform).
 269
 270    WARNING: If you need to use this flag, chances are that your pass
 271    may be doing something wrong.  Inserting PHI nodes for an old name
 272    where not all edges carry a new replacement may lead to silent
 273    codegen errors or spurious uninitialized warnings.  */
 274 #define TODO_update_ssa_full_phi        (1 << 13)
 275
 276 /* Passes that update the SSA form on their own may want to delegate
 277    the updating of virtual names to the generic updater.  Since FUD
 278    chains are easier to maintain, this simplifies the work they need
 279    to do.  NOTE: If this flag is used, any OLD->NEW mappings for real
 280    names are explicitly destroyed and only the symbols marked for
 281    renaming are processed.  */
 282 #define TODO_update_ssa_only_virtuals   (1 << 14)
 283
 284 /* Some passes leave unused local variables that can be removed from
 285    cfun->local_decls.  This reduces the size of dump files
 286    and the memory footprint for VAR_DECLs.  */
 287 #define TODO_remove_unused_locals       (1 << 15)
 288
 289 /* Call df_finish at the end of the pass.  This is done after all of
 290    the dumpers have been allowed to run so that they have access to
 291    the instance before it is destroyed.  */
 292 #define TODO_df_finish                  (1 << 17)
 293
 294 /* Call df_verify at the end of the pass if checking is enabled.  */
 295 #define TODO_df_verify                  (1 << 18)
 296
 297 /* Internally used for the first instance of a pass.  */
 298 #define TODO_mark_first_instance        (1 << 19)
 299
 300 /* Rebuild aliasing info.  */
 301 #define TODO_rebuild_alias              (1 << 20)
 302
 303 /* Rebuild the addressable-vars bitmap and do register promotion.  */
 304 #define TODO_update_address_taken       (1 << 21)
 305
 306 /* Internally used in execute_function_todo().  */
 307 #define TODO_update_ssa_any             \
 308     (TODO_update_ssa                    \
 309      | TODO_update_ssa_no_phi           \
 310      | TODO_update_ssa_full_phi         \
 311      | TODO_update_ssa_only_virtuals)
 312
 313 #define TODO_verify_all \
 314   (TODO_verify_ssa | TODO_verify_flow | TODO_verify_stmts)
 315
 316
 317 /* Register pass info. */
 318
 319 enum pass_positioning_ops
 320 {
 321   PASS_POS_INSERT_AFTER,  /* Insert after the reference pass.  */
 322   PASS_POS_INSERT_BEFORE, /* Insert before the reference pass.  */
 323   PASS_POS_REPLACE        /* Replace the reference pass.  */
 324 };
 325
 326 struct register_pass_info
 327 {
 328   struct opt_pass *pass;            /* New pass to register.  */
 329   const char *reference_pass_name;  /* Name of the reference pass for hooking
 330                                        up the new pass.  */
 331   int ref_pass_instance_number;     /* Insert the pass at the specified
 332                                        instance number of the reference pass.
 333                                        Do it for every instance if it is 0.  */
 334   enum pass_positioning_ops pos_op; /* how to insert the new pass.  */
 335 };
 336
 337 extern void tree_lowering_passes (tree decl);
 338
 339 extern struct gimple_opt_pass pass_mudflap_1;
 340 extern struct gimple_opt_pass pass_mudflap_2;
 341 extern struct gimple_opt_pass pass_lower_cf;
 342 extern struct gimple_opt_pass pass_refactor_eh;
 343 extern struct gimple_opt_pass pass_lower_eh;
 344 extern struct gimple_opt_pass pass_lower_eh_dispatch;
 345 extern struct gimple_opt_pass pass_lower_resx;
 346 extern struct gimple_opt_pass pass_build_cfg;
 347 extern struct gimple_opt_pass pass_tree_profile;
 348 extern struct gimple_opt_pass pass_early_tree_profile;
 349 extern struct gimple_opt_pass pass_cleanup_cfg;
 350 extern struct gimple_opt_pass pass_referenced_vars;
 351 extern struct gimple_opt_pass pass_cleanup_eh;
 352 extern struct gimple_opt_pass pass_fixup_cfg;
 353 extern struct gimple_opt_pass pass_sra;
 354 extern struct gimple_opt_pass pass_sra_early;
 355 extern struct gimple_opt_pass pass_early_ipa_sra;
 356 extern struct gimple_opt_pass pass_tail_recursion;
 357 extern struct gimple_opt_pass pass_tail_calls;
 358 extern struct gimple_opt_pass pass_tree_loop;
 359 extern struct gimple_opt_pass pass_tree_loop_init;
 360 extern struct gimple_opt_pass pass_lim;
 361 extern struct gimple_opt_pass pass_tree_unswitch;
 362 extern struct gimple_opt_pass pass_predcom;
 363 extern struct gimple_opt_pass pass_iv_canon;
 364 extern struct gimple_opt_pass pass_scev_cprop;
 365 extern struct gimple_opt_pass pass_empty_loop;
 366 extern struct gimple_opt_pass pass_record_bounds;
 367 extern struct gimple_opt_pass pass_graphite_transforms;
 368 extern struct gimple_opt_pass pass_if_conversion;
 369 extern struct gimple_opt_pass pass_loop_distribution;
 370 extern struct gimple_opt_pass pass_vectorize;
 371 extern struct gimple_opt_pass pass_slp_vectorize;
 372 extern struct gimple_opt_pass pass_complete_unroll;
 373 extern struct gimple_opt_pass pass_complete_unrolli;
 374 extern struct gimple_opt_pass pass_parallelize_loops;
 375 extern struct gimple_opt_pass pass_loop_prefetch;
 376 extern struct gimple_opt_pass pass_iv_optimize;
 377 extern struct gimple_opt_pass pass_tree_loop_done;
 378 extern struct gimple_opt_pass pass_ch;
 379 extern struct gimple_opt_pass pass_ccp;
 380 extern struct gimple_opt_pass pass_phi_only_cprop;
 381 extern struct gimple_opt_pass pass_build_ssa;
 382 extern struct gimple_opt_pass pass_build_alias;
 383 extern struct gimple_opt_pass pass_build_ealias;
 384 extern struct gimple_opt_pass pass_dominator;
 385 extern struct gimple_opt_pass pass_dce;
 386 extern struct gimple_opt_pass pass_dce_loop;
 387 extern struct gimple_opt_pass pass_cd_dce;
 388 extern struct gimple_opt_pass pass_call_cdce;
 389 extern struct gimple_opt_pass pass_merge_phi;
 390 extern struct gimple_opt_pass pass_split_crit_edges;
 391 extern struct gimple_opt_pass pass_pre;
 392 extern struct gimple_opt_pass pass_profile;
 393 extern struct gimple_opt_pass pass_strip_predict_hints;
 394 extern struct gimple_opt_pass pass_lower_complex_O0;
 395 extern struct gimple_opt_pass pass_lower_complex;
 396 extern struct gimple_opt_pass pass_lower_vector;
 397 extern struct gimple_opt_pass pass_lower_vector_ssa;
 398 extern struct gimple_opt_pass pass_lower_omp;
 399 extern struct gimple_opt_pass pass_diagnose_omp_blocks;
 400 extern struct gimple_opt_pass pass_expand_omp;
 401 extern struct gimple_opt_pass pass_expand_omp_ssa;
 402 extern struct gimple_opt_pass pass_object_sizes;
 403 extern struct gimple_opt_pass pass_fold_builtins;
 404 extern struct gimple_opt_pass pass_stdarg;
 405 extern struct gimple_opt_pass pass_early_warn_uninitialized;
 406 extern struct gimple_opt_pass pass_late_warn_uninitialized;
 407 extern struct gimple_opt_pass pass_cse_reciprocals;
 408 extern struct gimple_opt_pass pass_cse_sincos;
 409 extern struct gimple_opt_pass pass_optimize_bswap;
 410 extern struct gimple_opt_pass pass_warn_function_return;
 411 extern struct gimple_opt_pass pass_warn_function_noreturn;
 412 extern struct gimple_opt_pass pass_cselim;
 413 extern struct gimple_opt_pass pass_phiopt;
 414 extern struct gimple_opt_pass pass_forwprop;
 415 extern struct gimple_opt_pass pass_phiprop;
 416 extern struct gimple_opt_pass pass_tree_ifcombine;
 417 extern struct gimple_opt_pass pass_dse;
 418 extern struct gimple_opt_pass pass_nrv;
 419 extern struct gimple_opt_pass pass_rename_ssa_copies;
 420 extern struct gimple_opt_pass pass_rest_of_compilation;
 421 extern struct gimple_opt_pass pass_sink_code;
 422 extern struct gimple_opt_pass pass_fre;
 423 extern struct gimple_opt_pass pass_linear_transform;
 424 extern struct gimple_opt_pass pass_check_data_deps;
 425 extern struct gimple_opt_pass pass_copy_prop;
 426 extern struct gimple_opt_pass pass_vrp;
 427 extern struct gimple_opt_pass pass_uncprop;
 428 extern struct gimple_opt_pass pass_return_slot;
 429 extern struct gimple_opt_pass pass_reassoc;
 430 extern struct gimple_opt_pass pass_rebuild_cgraph_edges;
 431 extern struct gimple_opt_pass pass_remove_cgraph_callee_edges;
 432 extern struct gimple_opt_pass pass_build_cgraph_edges;
 433 extern struct gimple_opt_pass pass_local_pure_const;
 434 extern struct gimple_opt_pass pass_tracer;
 435 extern struct gimple_opt_pass pass_warn_unused_result;
 436
 437 /* IPA Passes */
 438 extern struct simple_ipa_opt_pass pass_ipa_function_and_variable_visibility;
 439 extern struct simple_ipa_opt_pass pass_ipa_early_inline;
 440
 441 extern struct simple_ipa_opt_pass pass_early_local_passes;
 442
 443 extern struct ipa_opt_pass_d pass_ipa_whole_program_visibility;
 444 extern struct ipa_opt_pass_d pass_ipa_lto_gimple_out;
 445 extern struct simple_ipa_opt_pass pass_ipa_increase_alignment;
 446 extern struct simple_ipa_opt_pass pass_ipa_matrix_reorg;
 447 extern struct ipa_opt_pass_d pass_ipa_inline;
 448 extern struct simple_ipa_opt_pass pass_ipa_free_lang_data;
 449 extern struct ipa_opt_pass_d pass_ipa_cp;
 450 extern struct ipa_opt_pass_d pass_ipa_reference;
 451 extern struct ipa_opt_pass_d pass_ipa_pure_const;
 452 extern struct simple_ipa_opt_pass pass_ipa_type_escape;
 453 extern struct simple_ipa_opt_pass pass_ipa_pta;
 454 extern struct simple_ipa_opt_pass pass_ipa_struct_reorg;
 455 extern struct ipa_opt_pass_d pass_ipa_lto_wpa_fixup;
 456 extern struct ipa_opt_pass_d pass_ipa_lto_finish_out;
 457
 458 extern struct gimple_opt_pass pass_all_optimizations;
 459 extern struct gimple_opt_pass pass_cleanup_cfg_post_optimizing;
 460 extern struct gimple_opt_pass pass_init_datastructures;
 461 extern struct gimple_opt_pass pass_fixup_cfg;
 462
 463 extern struct rtl_opt_pass pass_expand;
 464 extern struct rtl_opt_pass pass_init_function;
 465 extern struct rtl_opt_pass pass_jump;
 466 extern struct rtl_opt_pass pass_rtl_eh;
 467 extern struct rtl_opt_pass pass_initial_value_sets;
 468 extern struct rtl_opt_pass pass_unshare_all_rtl;
 469 extern struct rtl_opt_pass pass_instantiate_virtual_regs;
 470 extern struct rtl_opt_pass pass_rtl_fwprop;
 471 extern struct rtl_opt_pass pass_rtl_fwprop_addr;
 472 extern struct rtl_opt_pass pass_jump2;
 473 extern struct rtl_opt_pass pass_lower_subreg;
 474 extern struct rtl_opt_pass pass_cse;
 475 extern struct rtl_opt_pass pass_fast_rtl_dce;
 476 extern struct rtl_opt_pass pass_ud_rtl_dce;
 477 extern struct rtl_opt_pass pass_rtl_dce;
 478 extern struct rtl_opt_pass pass_rtl_dse1;
 479 extern struct rtl_opt_pass pass_rtl_dse2;
 480 extern struct rtl_opt_pass pass_rtl_dse3;
 481 extern struct rtl_opt_pass pass_rtl_cprop;
 482 extern struct rtl_opt_pass pass_rtl_pre;
 483 extern struct rtl_opt_pass pass_rtl_hoist;
 484 extern struct rtl_opt_pass pass_rtl_store_motion;
 485 extern struct rtl_opt_pass pass_cse_after_global_opts;
 486 extern struct rtl_opt_pass pass_rtl_ifcvt;
 487
 488 extern struct rtl_opt_pass pass_into_cfg_layout_mode;
 489 extern struct rtl_opt_pass pass_outof_cfg_layout_mode;
 490
 491 extern struct rtl_opt_pass pass_loop2;
 492 extern struct rtl_opt_pass pass_rtl_loop_init;
 493 extern struct rtl_opt_pass pass_rtl_move_loop_invariants;
 494 extern struct rtl_opt_pass pass_rtl_unswitch;
 495 extern struct rtl_opt_pass pass_rtl_unroll_and_peel_loops;
 496 extern struct rtl_opt_pass pass_rtl_doloop;
 497 extern struct rtl_opt_pass pass_rtl_loop_done;
 498
 499 extern struct rtl_opt_pass pass_web;
 500 extern struct rtl_opt_pass pass_cse2;
 501 extern struct rtl_opt_pass pass_df_initialize_opt;
 502 extern struct rtl_opt_pass pass_df_initialize_no_opt;
 503 extern struct rtl_opt_pass pass_reginfo_init;
 504 extern struct rtl_opt_pass pass_inc_dec;
 505 extern struct rtl_opt_pass pass_stack_ptr_mod;
 506 extern struct rtl_opt_pass pass_initialize_regs;
 507 extern struct rtl_opt_pass pass_combine;
 508 extern struct rtl_opt_pass pass_if_after_combine;
 509 extern struct rtl_opt_pass pass_partition_blocks;
 510 extern struct rtl_opt_pass pass_match_asm_constraints;
 511 extern struct rtl_opt_pass pass_regmove;
 512 extern struct rtl_opt_pass pass_split_all_insns;
 513 extern struct rtl_opt_pass pass_fast_rtl_byte_dce;
 514 extern struct rtl_opt_pass pass_lower_subreg2;
 515 extern struct rtl_opt_pass pass_mode_switching;
 516 extern struct rtl_opt_pass pass_sms;
 517 extern struct rtl_opt_pass pass_sched;
 518 extern struct rtl_opt_pass pass_ira;
 519 extern struct rtl_opt_pass pass_postreload;
 520 extern struct rtl_opt_pass pass_clean_state;
 521 extern struct rtl_opt_pass pass_branch_prob;
 522 extern struct rtl_opt_pass pass_value_profile_transformations;
 523 extern struct rtl_opt_pass pass_postreload_cse;
 524 extern struct rtl_opt_pass pass_gcse2;
 525 extern struct rtl_opt_pass pass_split_after_reload;
 526 extern struct rtl_opt_pass pass_branch_target_load_optimize1;
 527 extern struct rtl_opt_pass pass_thread_prologue_and_epilogue;
 528 extern struct rtl_opt_pass pass_stack_adjustments;
 529 extern struct rtl_opt_pass pass_peephole2;
 530 extern struct rtl_opt_pass pass_if_after_reload;
 531 extern struct rtl_opt_pass pass_regrename;
 532 extern struct rtl_opt_pass pass_cprop_hardreg;
 533 extern struct rtl_opt_pass pass_reorder_blocks;
 534 extern struct rtl_opt_pass pass_branch_target_load_optimize2;
 535 extern struct rtl_opt_pass pass_leaf_regs;
 536 extern struct rtl_opt_pass pass_split_before_sched2;
 537 extern struct rtl_opt_pass pass_sched2;
 538 extern struct rtl_opt_pass pass_stack_regs;
 539 extern struct rtl_opt_pass pass_stack_regs_run;
 540 extern struct rtl_opt_pass pass_df_finish;
 541 extern struct rtl_opt_pass pass_compute_alignments;
 542 extern struct rtl_opt_pass pass_duplicate_computed_gotos;
 543 extern struct rtl_opt_pass pass_variable_tracking;
 544 extern struct rtl_opt_pass pass_free_cfg;
 545 extern struct rtl_opt_pass pass_machine_reorg;
 546 extern struct rtl_opt_pass pass_cleanup_barriers;
 547 extern struct rtl_opt_pass pass_delay_slots;
 548 extern struct rtl_opt_pass pass_split_for_shorten_branches;
 549 extern struct rtl_opt_pass pass_split_before_regstack;
 550 extern struct rtl_opt_pass pass_convert_to_eh_region_ranges;
 551 extern struct rtl_opt_pass pass_shorten_branches;
 552 extern struct rtl_opt_pass pass_set_nothrow_function_flags;
 553 extern struct rtl_opt_pass pass_final;
 554 extern struct rtl_opt_pass pass_rtl_seqabstr;
 555 extern struct gimple_opt_pass pass_release_ssa_names;
 556 extern struct gimple_opt_pass pass_early_inline;
 557 extern struct gimple_opt_pass pass_inline_parameters;
 558 extern struct gimple_opt_pass pass_all_early_optimizations;
 559 extern struct gimple_opt_pass pass_update_address_taken;
 560 extern struct gimple_opt_pass pass_convert_switch;
 561
 562 /* The root of the compilation pass tree, once constructed.  */
 563 extern struct opt_pass *all_passes, *all_small_ipa_passes, *all_lowering_passes,
 564                        *all_regular_ipa_passes, *all_lto_gen_passes;
 565
 566 /* Define a list of pass lists so that both passes.c and plugins can easily
 567    find all the pass lists.  */
 568 #define GCC_PASS_LISTS \
 569   DEF_PASS_LIST (all_lowering_passes) \
 570   DEF_PASS_LIST (all_small_ipa_passes) \
 571   DEF_PASS_LIST (all_regular_ipa_passes) \
 572   DEF_PASS_LIST (all_lto_gen_passes) \
 573   DEF_PASS_LIST (all_passes)
 574
 575 #define DEF_PASS_LIST(LIST) PASS_LIST_NO_##LIST,
 576 enum
 577 {
 578   GCC_PASS_LISTS
 579   PASS_LIST_NUM
 580 };
 581 #undef DEF_PASS_LIST
 582
 583 /* This is used by plugins, and should also be used in
 584    passes.c:register_pass.  */
 585 extern struct opt_pass **gcc_pass_lists[];
 586
 587 /* Current optimization pass.  */
 588 extern struct opt_pass *current_pass;
 589
 590 extern struct opt_pass * get_pass_for_id (int);
 591 extern bool execute_one_pass (struct opt_pass *);
 592 extern void execute_pass_list (struct opt_pass *);
 593 extern void execute_ipa_pass_list (struct opt_pass *);
 594 extern void execute_ipa_summary_passes (struct ipa_opt_pass_d *);
 595 extern void execute_all_ipa_transforms (void);
 596 extern void execute_all_ipa_stmt_fixups (struct cgraph_node *, gimple *);
 597 extern bool pass_init_dump_file (struct opt_pass *);
 598 extern void pass_fini_dump_file (struct opt_pass *);
 599
 600 extern const char *get_current_pass_name (void);
 601 extern void print_current_pass (FILE *);
 602 extern void debug_pass (void);
 603 extern void ipa_write_summaries (void);
 604 extern void ipa_write_summaries_of_cgraph_node_set (
 605               struct cgraph_node_set_def *);
 606 extern void ipa_read_summaries (void);
 607 extern void register_one_dump_file (struct opt_pass *);
 608 extern bool function_called_by_processed_nodes_p (void);
 609 extern void register_pass (struct register_pass_info *);
 610
 611 /* Set to true if the pass is called the first time during compilation of the
 612    current function.  Note that using this information in the optimization
 613    passes is considered not to be clean, and it should be avoided if possible.
 614    This flag is currently used to prevent loops from being peeled repeatedly
 615    in jump threading; it will be removed once we preserve loop structures
 616    throughout the compilation -- we will be able to mark the affected loops
 617    directly in jump threading, and avoid peeling them next time.  */
 618 extern bool first_pass_instance;
 619
 620 /* Declare for plugins.  */
 621 extern void do_per_function_toporder (void (*) (void *), void *);
 622
 623 #endif /* GCC_TREE_PASS_H */