gcc/tree-pass.h

   1 /* Definitions for describing one tree-ssa optimization pass.
   2    Copyright (C) 2004, 2005 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 2, 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 COPYING.  If not, write to
  19 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  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_inlined,                  /* dump each function after inlining
  40                                    within it.  */
  41   TDI_vcg,                      /* create a VCG graph file for each
  42                                    function's flowgraph.  */
  43   TDI_tree_all,                 /* enable all the GENERIC/GIMPLE dumps.  */
  44   TDI_rtl_all,                  /* enable all the RTL dumps.  */
  45   TDI_ipa_all,                  /* enable all the IPA dumps.  */
  46
  47   TDI_end
  48 };
  49
  50 /* Bit masks to control dumping. Not all values are applicable to
  51    all dumps. Add new ones at the end. When you define new
  52    values, extend the DUMP_OPTIONS array in tree-dump.c */
  53 #define TDF_ADDRESS     (1 << 0)        /* dump node addresses */
  54 #define TDF_SLIM        (1 << 1)        /* don't go wild following links */
  55 #define TDF_RAW         (1 << 2)        /* don't unparse the function */
  56 #define TDF_DETAILS     (1 << 3)        /* show more detailed info about
  57                                            each pass */
  58 #define TDF_STATS       (1 << 4)        /* dump various statistics about
  59                                            each pass */
  60 #define TDF_BLOCKS      (1 << 5)        /* display basic block boundaries */
  61 #define TDF_VOPS        (1 << 6)        /* display virtual operands */
  62 #define TDF_LINENO      (1 << 7)        /* display statement line numbers */
  63 #define TDF_UID         (1 << 8)        /* display decl UIDs */
  64
  65 #define TDF_TREE        (1 << 9)        /* is a tree dump */
  66 #define TDF_RTL         (1 << 10)       /* is a RTL dump */
  67 #define TDF_IPA         (1 << 11)       /* is an IPA dump */
  68 #define TDF_STMTADDR    (1 << 12)       /* Address of stmt.  */
  69
  70 #define TDF_GRAPH       (1 << 13)       /* a graph dump is being emitted */
  71
  72 extern char *get_dump_file_name (enum tree_dump_index);
  73 extern int dump_enabled_p (enum tree_dump_index);
  74 extern int dump_initialized_p (enum tree_dump_index);
  75 extern FILE *dump_begin (enum tree_dump_index, int *);
  76 extern void dump_end (enum tree_dump_index, FILE *);
  77 extern void dump_node (tree, int, FILE *);
  78 extern int dump_switch_p (const char *);
  79 extern const char *dump_flag_name (enum tree_dump_index);
  80
  81 /* Global variables used to communicate with passes.  */
  82 extern FILE *dump_file;
  83 extern int dump_flags;
  84 extern const char *dump_file_name;
  85
  86 /* Return the dump_file_info for the given phase.  */
  87 extern struct dump_file_info *get_dump_file_info (enum tree_dump_index);
  88
  89 /* Describe one pass.  */
  90 struct tree_opt_pass
  91 {
  92   /* Terse name of the pass used as a fragment of the dump file name.  */
  93   const char *name;
  94
  95   /* If non-null, this pass and all sub-passes are executed only if
  96      the function returns true.  */
  97   bool (*gate) (void);
  98
  99   /* This is the code to run.  If null, then there should be sub-passes
 100      otherwise this pass does nothing.  The return value contains
 101      TODOs to execute in addition to those in TODO_flags_finish.   */
 102   unsigned int (*execute) (void);
 103
 104   /* A list of sub-passes to run, dependent on gate predicate.  */
 105   struct tree_opt_pass *sub;
 106
 107   /* Next in the list of passes to run, independent of gate predicate.  */
 108   struct tree_opt_pass *next;
 109
 110   /* Static pass number, used as a fragment of the dump file name.  */
 111   int static_pass_number;
 112
 113   /* The timevar id associated with this pass.  */
 114   /* ??? Ideally would be dynamically assigned.  */
 115   unsigned int tv_id;
 116
 117   /* Sets of properties input and output from this pass.  */
 118   unsigned int properties_required;
 119   unsigned int properties_provided;
 120   unsigned int properties_destroyed;
 121
 122   /* Flags indicating common sets things to do before and after.  */
 123   unsigned int todo_flags_start;
 124   unsigned int todo_flags_finish;
 125
 126   /* Letter for RTL dumps.  */
 127   char letter;
 128 };
 129
 130 /* Define a tree dump switch.  */
 131 struct dump_file_info
 132 {
 133   const char *suffix;           /* suffix to give output file.  */
 134   const char *swtch;            /* command line switch */
 135   const char *glob;             /* command line glob  */
 136   int flags;                    /* user flags */
 137   int state;                    /* state of play */
 138   int num;                      /* dump file number */
 139   int letter;                   /* enabling letter for RTL dumps */
 140 };
 141
 142 /* Pass properties.  */
 143 #define PROP_gimple_any         (1 << 0)        /* entire gimple grammar */
 144 #define PROP_gimple_lcf         (1 << 1)        /* lowered control flow */
 145 #define PROP_gimple_leh         (1 << 2)        /* lowered eh */
 146 #define PROP_cfg                (1 << 3)
 147 #define PROP_referenced_vars    (1 << 4)
 148 #define PROP_pta                (1 << 5)
 149 #define PROP_ssa                (1 << 6)
 150 #define PROP_no_crit_edges      (1 << 7)
 151 #define PROP_rtl                (1 << 8)
 152 #define PROP_alias              (1 << 9)
 153 #define PROP_gimple_lomp        (1 << 10)       /* lowered OpenMP directives */
 154 #define PROP_smt_usage          (1 << 11)       /* which SMT's are
 155                                                    used alone.  */
 156
 157 #define PROP_trees \
 158   (PROP_gimple_any | PROP_gimple_lcf | PROP_gimple_leh | PROP_gimple_lomp)
 159
 160 /* To-do flags.  */
 161 #define TODO_dump_func                  (1 << 0)
 162 #define TODO_ggc_collect                (1 << 1)
 163 #define TODO_verify_ssa                 (1 << 2)
 164 #define TODO_verify_flow                (1 << 3)
 165 #define TODO_verify_stmts               (1 << 4)
 166 #define TODO_cleanup_cfg                (1 << 5)
 167 #define TODO_verify_loops               (1 << 6)
 168 #define TODO_dump_cgraph                (1 << 7)
 169
 170 /* To-do flags for calls to update_ssa.  */
 171
 172 /* Update the SSA form inserting PHI nodes for newly exposed symbols
 173    and virtual names marked for updating.  When updating real names,
 174    only insert PHI nodes for a real name O_j in blocks reached by all
 175    the new and old definitions for O_j.  If the iterated dominance
 176    frontier for O_j is not pruned, we may end up inserting PHI nodes
 177    in blocks that have one or more edges with no incoming definition
 178    for O_j.  This would lead to uninitialized warnings for O_j's
 179    symbol.  */
 180 #define TODO_update_ssa                 (1 << 8)
 181
 182 /* Update the SSA form without inserting any new PHI nodes at all.
 183    This is used by passes that have either inserted all the PHI nodes
 184    themselves or passes that need only to patch use-def and def-def
 185    chains for virtuals (e.g., DCE).  */
 186 #define TODO_update_ssa_no_phi          (1 << 9)
 187
 188 /* Insert PHI nodes everywhere they are needed.  No pruning of the
 189    IDF is done.  This is used by passes that need the PHI nodes for
 190    O_j even if it means that some arguments will come from the default
 191    definition of O_j's symbol (e.g., pass_linear_transform).
 192
 193    WARNING: If you need to use this flag, chances are that your pass
 194    may be doing something wrong.  Inserting PHI nodes for an old name
 195    where not all edges carry a new replacement may lead to silent
 196    codegen errors or spurious uninitialized warnings.  */
 197 #define TODO_update_ssa_full_phi        (1 << 10)
 198
 199 /* Passes that update the SSA form on their own may want to delegate
 200    the updating of virtual names to the generic updater.  Since FUD
 201    chains are easier to maintain, this simplifies the work they need
 202    to do.  NOTE: If this flag is used, any OLD->NEW mappings for real
 203    names are explicitly destroyed and only the symbols marked for
 204    renaming are processed.  */
 205 #define TODO_update_ssa_only_virtuals   (1 << 11)
 206
 207 /* Some passes leave unused local variables that can be removed from
 208    cfun->unexpanded_var_list.  This reduces the size of dump files and
 209    the memory footprint for VAR_DECLs.  */
 210 #define TODO_remove_unused_locals       (1 << 12)
 211
 212 /* Internally used for the first in a sequence of passes.  It is set
 213    for the passes that are handed to register_dump_files.  */
 214 #define TODO_set_props                  (1 << 13)
 215
 216 /* Set by passes that may make SMT's that were previously never used
 217    in statements, used.  */
 218 #define TODO_update_smt_usage           (1 << 14)
 219
 220 #define TODO_update_ssa_any             \
 221     (TODO_update_ssa                    \
 222      | TODO_update_ssa_no_phi           \
 223      | TODO_update_ssa_full_phi         \
 224      | TODO_update_ssa_only_virtuals)
 225
 226 #define TODO_verify_all \
 227   (TODO_verify_ssa | TODO_verify_flow | TODO_verify_stmts)
 228
 229 extern void tree_lowering_passes (tree decl);
 230
 231 extern struct tree_opt_pass pass_mudflap_1;
 232 extern struct tree_opt_pass pass_mudflap_2;
 233 extern struct tree_opt_pass pass_remove_useless_stmts;
 234 extern struct tree_opt_pass pass_lower_cf;
 235 extern struct tree_opt_pass pass_lower_eh;
 236 extern struct tree_opt_pass pass_build_cfg;
 237 extern struct tree_opt_pass pass_tree_profile;
 238 extern struct tree_opt_pass pass_early_tree_profile;
 239 extern struct tree_opt_pass pass_cleanup_cfg;
 240 extern struct tree_opt_pass pass_referenced_vars;
 241 extern struct tree_opt_pass pass_sra;
 242 extern struct tree_opt_pass pass_tail_recursion;
 243 extern struct tree_opt_pass pass_tail_calls;
 244 extern struct tree_opt_pass pass_tree_loop;
 245 extern struct tree_opt_pass pass_tree_loop_init;
 246 extern struct tree_opt_pass pass_lim;
 247 extern struct tree_opt_pass pass_tree_unswitch;
 248 extern struct tree_opt_pass pass_iv_canon;
 249 extern struct tree_opt_pass pass_scev_cprop;
 250 extern struct tree_opt_pass pass_empty_loop;
 251 extern struct tree_opt_pass pass_record_bounds;
 252 extern struct tree_opt_pass pass_if_conversion;
 253 extern struct tree_opt_pass pass_vectorize;
 254 extern struct tree_opt_pass pass_complete_unroll;
 255 extern struct tree_opt_pass pass_loop_prefetch;
 256 extern struct tree_opt_pass pass_iv_optimize;
 257 extern struct tree_opt_pass pass_tree_loop_done;
 258 extern struct tree_opt_pass pass_ch;
 259 extern struct tree_opt_pass pass_ccp;
 260 extern struct tree_opt_pass pass_phi_only_cprop;
 261 extern struct tree_opt_pass pass_build_ssa;
 262 extern struct tree_opt_pass pass_del_ssa;
 263 extern struct tree_opt_pass pass_dominator;
 264 extern struct tree_opt_pass pass_dce;
 265 extern struct tree_opt_pass pass_dce_loop;
 266 extern struct tree_opt_pass pass_cd_dce;
 267 extern struct tree_opt_pass pass_merge_phi;
 268 extern struct tree_opt_pass pass_may_alias;
 269 extern struct tree_opt_pass pass_split_crit_edges;
 270 extern struct tree_opt_pass pass_pre;
 271 extern struct tree_opt_pass pass_profile;
 272 extern struct tree_opt_pass pass_lower_complex_O0;
 273 extern struct tree_opt_pass pass_lower_complex;
 274 extern struct tree_opt_pass pass_lower_vector;
 275 extern struct tree_opt_pass pass_lower_vector_ssa;
 276 extern struct tree_opt_pass pass_lower_omp;
 277 extern struct tree_opt_pass pass_expand_omp;
 278 extern struct tree_opt_pass pass_object_sizes;
 279 extern struct tree_opt_pass pass_fold_builtins;
 280 extern struct tree_opt_pass pass_stdarg;
 281 extern struct tree_opt_pass pass_early_warn_uninitialized;
 282 extern struct tree_opt_pass pass_late_warn_uninitialized;
 283 extern struct tree_opt_pass pass_cse_reciprocals;
 284 extern struct tree_opt_pass pass_warn_function_return;
 285 extern struct tree_opt_pass pass_warn_function_noreturn;
 286 extern struct tree_opt_pass pass_phiopt;
 287 extern struct tree_opt_pass pass_forwprop;
 288 extern struct tree_opt_pass pass_redundant_phi;
 289 extern struct tree_opt_pass pass_dse;
 290 extern struct tree_opt_pass pass_nrv;
 291 extern struct tree_opt_pass pass_mark_used_blocks;
 292 extern struct tree_opt_pass pass_rename_ssa_copies;
 293 extern struct tree_opt_pass pass_expand;
 294 extern struct tree_opt_pass pass_rest_of_compilation;
 295 extern struct tree_opt_pass pass_sink_code;
 296 extern struct tree_opt_pass pass_fre;
 297 extern struct tree_opt_pass pass_linear_transform;
 298 extern struct tree_opt_pass pass_copy_prop;
 299 extern struct tree_opt_pass pass_store_ccp;
 300 extern struct tree_opt_pass pass_store_copy_prop;
 301 extern struct tree_opt_pass pass_vrp;
 302 extern struct tree_opt_pass pass_create_structure_vars;
 303 extern struct tree_opt_pass pass_uncprop;
 304 extern struct tree_opt_pass pass_return_slot;
 305 extern struct tree_opt_pass pass_reassoc;
 306 extern struct tree_opt_pass pass_rebuild_cgraph_edges;
 307 extern struct tree_opt_pass pass_reset_cc_flags;
 308
 309 /* IPA Passes */
 310 extern struct tree_opt_pass pass_ipa_cp;
 311 extern struct tree_opt_pass pass_ipa_inline;
 312 extern struct tree_opt_pass pass_early_ipa_inline;
 313 extern struct tree_opt_pass pass_ipa_reference;
 314 extern struct tree_opt_pass pass_ipa_pure_const;
 315 extern struct tree_opt_pass pass_ipa_type_escape;
 316 extern struct tree_opt_pass pass_ipa_pta;
 317 extern struct tree_opt_pass pass_early_local_passes;
 318
 319 extern struct tree_opt_pass pass_all_optimizations;
 320 extern struct tree_opt_pass pass_cleanup_cfg_post_optimizing;
 321 extern struct tree_opt_pass pass_free_cfg_annotations;
 322 extern struct tree_opt_pass pass_free_datastructures;
 323 extern struct tree_opt_pass pass_init_datastructures;
 324 extern struct tree_opt_pass pass_fixup_cfg;
 325
 326 extern struct tree_opt_pass pass_init_function;
 327 extern struct tree_opt_pass pass_jump;
 328 extern struct tree_opt_pass pass_insn_locators_initialize;
 329 extern struct tree_opt_pass pass_rtl_eh;
 330 extern struct tree_opt_pass pass_initial_value_sets;
 331 extern struct tree_opt_pass pass_unshare_all_rtl;
 332 extern struct tree_opt_pass pass_instantiate_virtual_regs;
 333 extern struct tree_opt_pass pass_jump2;
 334 extern struct tree_opt_pass pass_cse;
 335 extern struct tree_opt_pass pass_gcse;
 336 extern struct tree_opt_pass pass_jump_bypass;
 337 extern struct tree_opt_pass pass_profiling;
 338 extern struct tree_opt_pass pass_rtl_ifcvt;
 339 extern struct tree_opt_pass pass_tracer;
 340
 341 extern struct tree_opt_pass pass_loop2;
 342 extern struct tree_opt_pass pass_rtl_loop_init;
 343 extern struct tree_opt_pass pass_rtl_move_loop_invariants;
 344 extern struct tree_opt_pass pass_rtl_unswitch;
 345 extern struct tree_opt_pass pass_rtl_unroll_and_peel_loops;
 346 extern struct tree_opt_pass pass_rtl_doloop;
 347 extern struct tree_opt_pass pass_rtl_loop_done;
 348
 349 extern struct tree_opt_pass pass_web;
 350 extern struct tree_opt_pass pass_cse2;
 351 extern struct tree_opt_pass pass_life;
 352 extern struct tree_opt_pass pass_combine;
 353 extern struct tree_opt_pass pass_if_after_combine;
 354 extern struct tree_opt_pass pass_partition_blocks;
 355 extern struct tree_opt_pass pass_partition_blocks;
 356 extern struct tree_opt_pass pass_regmove;
 357 extern struct tree_opt_pass pass_split_all_insns;
 358 extern struct tree_opt_pass pass_mode_switching;
 359 extern struct tree_opt_pass pass_see;
 360 extern struct tree_opt_pass pass_recompute_reg_usage;
 361 extern struct tree_opt_pass pass_sms;
 362 extern struct tree_opt_pass pass_sched;
 363 extern struct tree_opt_pass pass_local_alloc;
 364 extern struct tree_opt_pass pass_global_alloc;
 365 extern struct tree_opt_pass pass_postreload;
 366 extern struct tree_opt_pass pass_clean_state;
 367 extern struct tree_opt_pass pass_branch_prob;
 368 extern struct tree_opt_pass pass_value_profile_transformations;
 369 extern struct tree_opt_pass pass_remove_death_notes;
 370 extern struct tree_opt_pass pass_postreload_cse;
 371 extern struct tree_opt_pass pass_gcse2;
 372 extern struct tree_opt_pass pass_flow2;
 373 extern struct tree_opt_pass pass_stack_adjustments;
 374 extern struct tree_opt_pass pass_peephole2;
 375 extern struct tree_opt_pass pass_if_after_reload;
 376 extern struct tree_opt_pass pass_regrename;
 377 extern struct tree_opt_pass pass_reorder_blocks;
 378 extern struct tree_opt_pass pass_branch_target_load_optimize;
 379 extern struct tree_opt_pass pass_leaf_regs;
 380 extern struct tree_opt_pass pass_sched2;
 381 extern struct tree_opt_pass pass_stack_regs;
 382 extern struct tree_opt_pass pass_compute_alignments;
 383 extern struct tree_opt_pass pass_duplicate_computed_gotos;
 384 extern struct tree_opt_pass pass_variable_tracking;
 385 extern struct tree_opt_pass pass_free_cfg;
 386 extern struct tree_opt_pass pass_machine_reorg;
 387 extern struct tree_opt_pass pass_purge_lineno_notes;
 388 extern struct tree_opt_pass pass_cleanup_barriers;
 389 extern struct tree_opt_pass pass_delay_slots;
 390 extern struct tree_opt_pass pass_split_for_shorten_branches;
 391 extern struct tree_opt_pass pass_split_before_regstack;
 392 extern struct tree_opt_pass pass_convert_to_eh_region_ranges;
 393 extern struct tree_opt_pass pass_shorten_branches;
 394 extern struct tree_opt_pass pass_set_nothrow_function_flags;
 395 extern struct tree_opt_pass pass_final;
 396 extern struct tree_opt_pass pass_rtl_seqabstr;
 397
 398 /* The root of the compilation pass tree, once constructed.  */
 399 extern struct tree_opt_pass *all_passes, *all_ipa_passes, *all_lowering_passes;
 400
 401 extern void execute_pass_list (struct tree_opt_pass *);
 402 extern void execute_ipa_pass_list (struct tree_opt_pass *);
 403
 404 #endif /* GCC_TREE_PASS_H */