gcc/tree-pass.h

   1 /* Definitions for describing one tree-ssa optimization pass.
   2    Copyright (C) 2004, 2005, 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_inlined,                  /* dump each function after inlining
  39                                    within it.  */
  40   TDI_vcg,                      /* create a VCG graph file for each
  41                                    function's flowgraph.  */
  42   TDI_tree_all,                 /* enable all the GENERIC/GIMPLE dumps.  */
  43   TDI_rtl_all,                  /* enable all the RTL dumps.  */
  44   TDI_ipa_all,                  /* enable all the IPA dumps.  */
  45
  46   TDI_end
  47 };
  48
  49 /* Bit masks to control dumping. Not all values are applicable to
  50    all dumps. Add new ones at the end. When you define new
  51    values, extend the DUMP_OPTIONS array in tree-dump.c */
  52 #define TDF_ADDRESS     (1 << 0)        /* dump node addresses */
  53 #define TDF_SLIM        (1 << 1)        /* don't go wild following links */
  54 #define TDF_RAW         (1 << 2)        /* don't unparse the function */
  55 #define TDF_DETAILS     (1 << 3)        /* show more detailed info about
  56                                            each pass */
  57 #define TDF_STATS       (1 << 4)        /* dump various statistics about
  58                                            each pass */
  59 #define TDF_BLOCKS      (1 << 5)        /* display basic block boundaries */
  60 #define TDF_VOPS        (1 << 6)        /* display virtual operands */
  61 #define TDF_LINENO      (1 << 7)        /* display statement line numbers */
  62 #define TDF_UID         (1 << 8)        /* display decl UIDs */
  63
  64 #define TDF_TREE        (1 << 9)        /* is a tree dump */
  65 #define TDF_RTL         (1 << 10)       /* is a RTL dump */
  66 #define TDF_IPA         (1 << 11)       /* is an IPA dump */
  67 #define TDF_STMTADDR    (1 << 12)       /* Address of stmt.  */
  68
  69 #define TDF_GRAPH       (1 << 13)       /* a graph dump is being emitted */
  70
  71 extern char *get_dump_file_name (enum tree_dump_index);
  72 extern int dump_enabled_p (enum tree_dump_index);
  73 extern int dump_initialized_p (enum tree_dump_index);
  74 extern FILE *dump_begin (enum tree_dump_index, int *);
  75 extern void dump_end (enum tree_dump_index, FILE *);
  76 extern void dump_node (tree, int, FILE *);
  77 extern int dump_switch_p (const char *);
  78 extern const char *dump_flag_name (enum tree_dump_index);
  79
  80 /* Global variables used to communicate with passes.  */
  81 extern FILE *dump_file;
  82 extern int dump_flags;
  83 extern const char *dump_file_name;
  84
  85 /* Return the dump_file_info for the given phase.  */
  86 extern struct dump_file_info *get_dump_file_info (enum tree_dump_index);
  87
  88 /* Describe one pass.  */
  89 struct tree_opt_pass
  90 {
  91   /* Terse name of the pass used as a fragment of the dump file name.  */
  92   const char *name;
  93
  94   /* If non-null, this pass and all sub-passes are executed only if
  95      the function returns true.  */
  96   bool (*gate) (void);
  97
  98   /* This is the code to run.  If null, then there should be sub-passes
  99      otherwise this pass does nothing.  The return value contains
 100      TODOs to execute in addition to those in TODO_flags_finish.   */
 101   unsigned int (*execute) (void);
 102
 103   /* A list of sub-passes to run, dependent on gate predicate.  */
 104   struct tree_opt_pass *sub;
 105
 106   /* Next in the list of passes to run, independent of gate predicate.  */
 107   struct tree_opt_pass *next;
 108
 109   /* Static pass number, used as a fragment of the dump file name.  */
 110   int static_pass_number;
 111
 112   /* The timevar id associated with this pass.  */
 113   /* ??? Ideally would be dynamically assigned.  */
 114   unsigned int tv_id;
 115
 116   /* Sets of properties input and output from this pass.  */
 117   unsigned int properties_required;
 118   unsigned int properties_provided;
 119   unsigned int properties_destroyed;
 120
 121   /* Flags indicating common sets things to do before and after.  */
 122   unsigned int todo_flags_start;
 123   unsigned int todo_flags_finish;
 124
 125   /* Letter for RTL dumps.  */
 126   char letter;
 127 };
 128
 129 /* Define a tree dump switch.  */
 130 struct dump_file_info
 131 {
 132   const char *suffix;           /* suffix to give output file.  */
 133   const char *swtch;            /* command line switch */
 134   const char *glob;             /* command line glob  */
 135   int flags;                    /* user flags */
 136   int state;                    /* state of play */
 137   int num;                      /* dump file number */
 138   int letter;                   /* enabling letter for RTL dumps */
 139 };
 140
 141 /* Pass properties.  */
 142 #define PROP_gimple_any         (1 << 0)        /* entire gimple grammar */
 143 #define PROP_gimple_lcf         (1 << 1)        /* lowered control flow */
 144 #define PROP_gimple_leh         (1 << 2)        /* lowered eh */
 145 #define PROP_cfg                (1 << 3)
 146 #define PROP_referenced_vars    (1 << 4)
 147 #define PROP_pta                (1 << 5)
 148 #define PROP_ssa                (1 << 6)
 149 #define PROP_no_crit_edges      (1 << 7)
 150 #define PROP_rtl                (1 << 8)
 151 #define PROP_alias              (1 << 9)
 152 #define PROP_gimple_lomp        (1 << 10)       /* lowered OpenMP directives */
 153 #define PROP_smt_usage          (1 << 11)       /* which SMT's are
 154                                                    used alone.  */
 155
 156 #define PROP_trees \
 157   (PROP_gimple_any | PROP_gimple_lcf | PROP_gimple_leh | PROP_gimple_lomp)
 158
 159 /* To-do flags.  */
 160 #define TODO_dump_func                  (1 << 0)
 161 #define TODO_ggc_collect                (1 << 1)
 162 #define TODO_verify_ssa                 (1 << 2)
 163 #define TODO_verify_flow                (1 << 3)
 164 #define TODO_verify_stmts               (1 << 4)
 165 #define TODO_cleanup_cfg                (1 << 5)
 166 #define TODO_verify_loops               (1 << 6)
 167 #define TODO_dump_cgraph                (1 << 7)
 168
 169 /* To-do flags for calls to update_ssa.  */
 170
 171 /* Update the SSA form inserting PHI nodes for newly exposed symbols
 172    and virtual names marked for updating.  When updating real names,
 173    only insert PHI nodes for a real name O_j in blocks reached by all
 174    the new and old definitions for O_j.  If the iterated dominance
 175    frontier for O_j is not pruned, we may end up inserting PHI nodes
 176    in blocks that have one or more edges with no incoming definition
 177    for O_j.  This would lead to uninitialized warnings for O_j's
 178    symbol.  */
 179 #define TODO_update_ssa                 (1 << 8)
 180
 181 /* Update the SSA form without inserting any new PHI nodes at all.
 182    This is used by passes that have either inserted all the PHI nodes
 183    themselves or passes that need only to patch use-def and def-def
 184    chains for virtuals (e.g., DCE).  */
 185 #define TODO_update_ssa_no_phi          (1 << 9)
 186
 187 /* Insert PHI nodes everywhere they are needed.  No pruning of the
 188    IDF is done.  This is used by passes that need the PHI nodes for
 189    O_j even if it means that some arguments will come from the default
 190    definition of O_j's symbol (e.g., pass_linear_transform).
 191
 192    WARNING: If you need to use this flag, chances are that your pass
 193    may be doing something wrong.  Inserting PHI nodes for an old name
 194    where not all edges carry a new replacement may lead to silent
 195    codegen errors or spurious uninitialized warnings.  */
 196 #define TODO_update_ssa_full_phi        (1 << 10)
 197
 198 /* Passes that update the SSA form on their own may want to delegate
 199    the updating of virtual names to the generic updater.  Since FUD
 200    chains are easier to maintain, this simplifies the work they need
 201    to do.  NOTE: If this flag is used, any OLD->NEW mappings for real
 202    names are explicitly destroyed and only the symbols marked for
 203    renaming are processed.  */
 204 #define TODO_update_ssa_only_virtuals   (1 << 11)
 205
 206 /* Some passes leave unused local variables that can be removed from
 207    cfun->unexpanded_var_list.  This reduces the size of dump files and
 208    the memory footprint for VAR_DECLs.  */
 209 #define TODO_remove_unused_locals       (1 << 12)
 210
 211 /* Internally used for the first in a sequence of passes.  It is set
 212    for the passes that are handed to register_dump_files.  */
 213 #define TODO_set_props                  (1 << 13)
 214
 215 /* Set by passes that may make SMT's that were previously never used
 216    in statements, used.  */
 217 #define TODO_update_smt_usage           (1 << 14)
 218
 219 #define TODO_update_ssa_any             \
 220     (TODO_update_ssa                    \
 221      | TODO_update_ssa_no_phi           \
 222      | TODO_update_ssa_full_phi         \
 223      | TODO_update_ssa_only_virtuals)
 224
 225 #define TODO_verify_all \
 226   (TODO_verify_ssa | TODO_verify_flow | TODO_verify_stmts)
 227
 228 extern void tree_lowering_passes (tree decl);
 229
 230 extern struct tree_opt_pass pass_mudflap_1;
 231 extern struct tree_opt_pass pass_mudflap_2;
 232 extern struct tree_opt_pass pass_remove_useless_stmts;
 233 extern struct tree_opt_pass pass_lower_cf;
 234 extern struct tree_opt_pass pass_lower_eh;
 235 extern struct tree_opt_pass pass_build_cfg;
 236 extern struct tree_opt_pass pass_tree_profile;
 237 extern struct tree_opt_pass pass_early_tree_profile;
 238 extern struct tree_opt_pass pass_cleanup_cfg;
 239 extern struct tree_opt_pass pass_referenced_vars;
 240 extern struct tree_opt_pass pass_sra;
 241 extern struct tree_opt_pass pass_tail_recursion;
 242 extern struct tree_opt_pass pass_tail_calls;
 243 extern struct tree_opt_pass pass_tree_loop;
 244 extern struct tree_opt_pass pass_tree_loop_init;
 245 extern struct tree_opt_pass pass_lim;
 246 extern struct tree_opt_pass pass_tree_unswitch;
 247 extern struct tree_opt_pass pass_iv_canon;
 248 extern struct tree_opt_pass pass_scev_cprop;
 249 extern struct tree_opt_pass pass_empty_loop;
 250 extern struct tree_opt_pass pass_record_bounds;
 251 extern struct tree_opt_pass pass_if_conversion;
 252 extern struct tree_opt_pass pass_vectorize;
 253 extern struct tree_opt_pass pass_complete_unroll;
 254 extern struct tree_opt_pass pass_loop_prefetch;
 255 extern struct tree_opt_pass pass_iv_optimize;
 256 extern struct tree_opt_pass pass_tree_loop_done;
 257 extern struct tree_opt_pass pass_ch;
 258 extern struct tree_opt_pass pass_ccp;
 259 extern struct tree_opt_pass pass_phi_only_cprop;
 260 extern struct tree_opt_pass pass_build_ssa;
 261 extern struct tree_opt_pass pass_del_ssa;
 262 extern struct tree_opt_pass pass_dominator;
 263 extern struct tree_opt_pass pass_dce;
 264 extern struct tree_opt_pass pass_dce_loop;
 265 extern struct tree_opt_pass pass_cd_dce;
 266 extern struct tree_opt_pass pass_merge_phi;
 267 extern struct tree_opt_pass pass_may_alias;
 268 extern struct tree_opt_pass pass_split_crit_edges;
 269 extern struct tree_opt_pass pass_pre;
 270 extern struct tree_opt_pass pass_profile;
 271 extern struct tree_opt_pass pass_lower_complex_O0;
 272 extern struct tree_opt_pass pass_lower_complex;
 273 extern struct tree_opt_pass pass_lower_vector;
 274 extern struct tree_opt_pass pass_lower_vector_ssa;
 275 extern struct tree_opt_pass pass_lower_omp;
 276 extern struct tree_opt_pass pass_expand_omp;
 277 extern struct tree_opt_pass pass_object_sizes;
 278 extern struct tree_opt_pass pass_fold_builtins;
 279 extern struct tree_opt_pass pass_stdarg;
 280 extern struct tree_opt_pass pass_early_warn_uninitialized;
 281 extern struct tree_opt_pass pass_late_warn_uninitialized;
 282 extern struct tree_opt_pass pass_cse_reciprocals;
 283 extern struct tree_opt_pass pass_warn_function_return;
 284 extern struct tree_opt_pass pass_warn_function_noreturn;
 285 extern struct tree_opt_pass pass_phiopt;
 286 extern struct tree_opt_pass pass_forwprop;
 287 extern struct tree_opt_pass pass_redundant_phi;
 288 extern struct tree_opt_pass pass_dse;
 289 extern struct tree_opt_pass pass_nrv;
 290 extern struct tree_opt_pass pass_mark_used_blocks;
 291 extern struct tree_opt_pass pass_rename_ssa_copies;
 292 extern struct tree_opt_pass pass_expand;
 293 extern struct tree_opt_pass pass_rest_of_compilation;
 294 extern struct tree_opt_pass pass_sink_code;
 295 extern struct tree_opt_pass pass_fre;
 296 extern struct tree_opt_pass pass_linear_transform;
 297 extern struct tree_opt_pass pass_copy_prop;
 298 extern struct tree_opt_pass pass_store_ccp;
 299 extern struct tree_opt_pass pass_store_copy_prop;
 300 extern struct tree_opt_pass pass_vrp;
 301 extern struct tree_opt_pass pass_create_structure_vars;
 302 extern struct tree_opt_pass pass_uncprop;
 303 extern struct tree_opt_pass pass_return_slot;
 304 extern struct tree_opt_pass pass_reassoc;
 305 extern struct tree_opt_pass pass_rebuild_cgraph_edges;
 306 extern struct tree_opt_pass pass_reset_cc_flags;
 307
 308 /* IPA Passes */
 309 extern struct tree_opt_pass pass_ipa_cp;
 310 extern struct tree_opt_pass pass_ipa_inline;
 311 extern struct tree_opt_pass pass_early_ipa_inline;
 312 extern struct tree_opt_pass pass_ipa_reference;
 313 extern struct tree_opt_pass pass_ipa_pure_const;
 314 extern struct tree_opt_pass pass_ipa_type_escape;
 315 extern struct tree_opt_pass pass_ipa_pta;
 316 extern struct tree_opt_pass pass_early_local_passes;
 317
 318 extern struct tree_opt_pass pass_all_optimizations;
 319 extern struct tree_opt_pass pass_cleanup_cfg_post_optimizing;
 320 extern struct tree_opt_pass pass_free_cfg_annotations;
 321 extern struct tree_opt_pass pass_free_datastructures;
 322 extern struct tree_opt_pass pass_init_datastructures;
 323 extern struct tree_opt_pass pass_fixup_cfg;
 324
 325 extern struct tree_opt_pass pass_init_function;
 326 extern struct tree_opt_pass pass_jump;
 327 extern struct tree_opt_pass pass_insn_locators_initialize;
 328 extern struct tree_opt_pass pass_rtl_eh;
 329 extern struct tree_opt_pass pass_initial_value_sets;
 330 extern struct tree_opt_pass pass_unshare_all_rtl;
 331 extern struct tree_opt_pass pass_instantiate_virtual_regs;
 332 extern struct tree_opt_pass pass_jump2;
 333 extern struct tree_opt_pass pass_cse;
 334 extern struct tree_opt_pass pass_gcse;
 335 extern struct tree_opt_pass pass_jump_bypass;
 336 extern struct tree_opt_pass pass_profiling;
 337 extern struct tree_opt_pass pass_rtl_ifcvt;
 338 extern struct tree_opt_pass pass_tracer;
 339
 340 extern struct tree_opt_pass pass_loop2;
 341 extern struct tree_opt_pass pass_rtl_loop_init;
 342 extern struct tree_opt_pass pass_rtl_move_loop_invariants;
 343 extern struct tree_opt_pass pass_rtl_unswitch;
 344 extern struct tree_opt_pass pass_rtl_unroll_and_peel_loops;
 345 extern struct tree_opt_pass pass_rtl_doloop;
 346 extern struct tree_opt_pass pass_rtl_loop_done;
 347
 348 extern struct tree_opt_pass pass_web;
 349 extern struct tree_opt_pass pass_cse2;
 350 extern struct tree_opt_pass pass_life;
 351 extern struct tree_opt_pass pass_combine;
 352 extern struct tree_opt_pass pass_if_after_combine;
 353 extern struct tree_opt_pass pass_partition_blocks;
 354 extern struct tree_opt_pass pass_partition_blocks;
 355 extern struct tree_opt_pass pass_regmove;
 356 extern struct tree_opt_pass pass_split_all_insns;
 357 extern struct tree_opt_pass pass_mode_switching;
 358 extern struct tree_opt_pass pass_see;
 359 extern struct tree_opt_pass pass_recompute_reg_usage;
 360 extern struct tree_opt_pass pass_sms;
 361 extern struct tree_opt_pass pass_sched;
 362 extern struct tree_opt_pass pass_local_alloc;
 363 extern struct tree_opt_pass pass_global_alloc;
 364 extern struct tree_opt_pass pass_postreload;
 365 extern struct tree_opt_pass pass_clean_state;
 366 extern struct tree_opt_pass pass_branch_prob;
 367 extern struct tree_opt_pass pass_value_profile_transformations;
 368 extern struct tree_opt_pass pass_remove_death_notes;
 369 extern struct tree_opt_pass pass_postreload_cse;
 370 extern struct tree_opt_pass pass_gcse2;
 371 extern struct tree_opt_pass pass_flow2;
 372 extern struct tree_opt_pass pass_stack_adjustments;
 373 extern struct tree_opt_pass pass_peephole2;
 374 extern struct tree_opt_pass pass_if_after_reload;
 375 extern struct tree_opt_pass pass_regrename;
 376 extern struct tree_opt_pass pass_reorder_blocks;
 377 extern struct tree_opt_pass pass_branch_target_load_optimize;
 378 extern struct tree_opt_pass pass_leaf_regs;
 379 extern struct tree_opt_pass pass_sched2;
 380 extern struct tree_opt_pass pass_stack_regs;
 381 extern struct tree_opt_pass pass_compute_alignments;
 382 extern struct tree_opt_pass pass_duplicate_computed_gotos;
 383 extern struct tree_opt_pass pass_variable_tracking;
 384 extern struct tree_opt_pass pass_free_cfg;
 385 extern struct tree_opt_pass pass_machine_reorg;
 386 extern struct tree_opt_pass pass_purge_lineno_notes;
 387 extern struct tree_opt_pass pass_cleanup_barriers;
 388 extern struct tree_opt_pass pass_delay_slots;
 389 extern struct tree_opt_pass pass_split_for_shorten_branches;
 390 extern struct tree_opt_pass pass_split_before_regstack;
 391 extern struct tree_opt_pass pass_convert_to_eh_region_ranges;
 392 extern struct tree_opt_pass pass_shorten_branches;
 393 extern struct tree_opt_pass pass_set_nothrow_function_flags;
 394 extern struct tree_opt_pass pass_final;
 395 extern struct tree_opt_pass pass_rtl_seqabstr;
 396
 397 /* The root of the compilation pass tree, once constructed.  */
 398 extern struct tree_opt_pass *all_passes, *all_ipa_passes, *all_lowering_passes;
 399
 400 extern void execute_pass_list (struct tree_opt_pass *);
 401 extern void execute_ipa_pass_list (struct tree_opt_pass *);
 402
 403 #endif /* GCC_TREE_PASS_H */