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>
6 This file is part of GCC.
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)
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.
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/>. */
23 #ifndef GCC_TREE_PASS_H
24 #define GCC_TREE_PASS_H 1
28 /* Different tree dump places. When you add new tree dump places,
29 extend the DUMP_FILES array in tree-dump.c. */
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. */
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
56 #define TDF_STATS (1 << 4) /* dump various statistics about
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 */
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. */
68 #define TDF_GRAPH (1 << 13) /* a graph dump is being emitted */
69 #define TDF_MEMSYMS (1 << 14) /* display memory symbols in expr.
72 #define TDF_DIAGNOSTIC (1 << 15) /* A dump to be put in a diagnostic
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
78 #define TDF_CGRAPH (1 << 18) /* Dump a graphical representation of call graph
79 to a separate file. */
81 /* Auxilliary dump file indices. Each value defines an auxiliary
82 dump file which is an additional dump file which may be generated
83 for a set of phases. Auxilliary dump files are named by appending
84 a suffix to the phase's main dump file name. When adding a new
85 auxiliary dump file, add a corresponding element in AUX_DUMP_INFO
86 in tree-dump.c to define the filename suffix. */
92 extern char *get_dump_file_name (enum tree_dump_index);
93 extern int dump_enabled_p (enum tree_dump_index);
94 extern int dump_initialized_p (enum tree_dump_index);
95 extern FILE *dump_begin (enum tree_dump_index, int *);
96 extern void dump_end (enum tree_dump_index, FILE *);
97 extern FILE *aux_dump_begin (enum aux_dump_index, enum tree_dump_index);
98 extern void aux_dump_end (enum aux_dump_index, enum tree_dump_index, FILE *);
99 extern void dump_node (const_tree, int, FILE *);
100 extern int dump_switch_p (const char *);
101 extern const char *dump_flag_name (enum tree_dump_index);
103 /* Global variables used to communicate with passes. */
104 extern FILE *dump_file;
105 extern int dump_flags;
106 extern const char *dump_file_name;
108 /* Return the dump_file_info for the given phase. */
109 extern struct dump_file_info *get_dump_file_info (enum tree_dump_index);
111 /* Describe one pass; this is the common part shared across different pass
115 /* Optimization pass type. */
122 /* Terse name of the pass used as a fragment of the dump file
123 name. If the name starts with a star, no dump happens. */
126 /* If non-null, this pass and all sub-passes are executed only if
127 the function returns true. */
130 /* This is the code to run. If null, then there should be sub-passes
131 otherwise this pass does nothing. The return value contains
132 TODOs to execute in addition to those in TODO_flags_finish. */
133 unsigned int (*execute) (void);
135 /* A list of sub-passes to run, dependent on gate predicate. */
136 struct opt_pass *sub;
138 /* Next in the list of passes to run, independent of gate predicate. */
139 struct opt_pass *next;
141 /* Static pass number, used as a fragment of the dump file name. */
142 int static_pass_number;
144 /* The timevar id associated with this pass. */
145 /* ??? Ideally would be dynamically assigned. */
148 /* Sets of properties input and output from this pass. */
149 unsigned int properties_required;
150 unsigned int properties_provided;
151 unsigned int properties_destroyed;
153 /* Flags indicating common sets things to do before and after. */
154 unsigned int todo_flags_start;
155 unsigned int todo_flags_finish;
158 /* Description of GIMPLE pass. */
159 struct gimple_opt_pass
161 struct opt_pass pass;
164 /* Description of RTL pass. */
167 struct opt_pass pass;
173 /* Description of IPA pass with generate summary, write, execute, read and
177 struct opt_pass pass;
179 /* IPA passes can analyze function body and variable initializers
180 using this hook and produce summary. */
181 void (*generate_summary) (void);
183 /* This hook is used to serialize IPA summaries on disk. */
184 void (*write_summary) (void);
186 /* For most ipa passes, the information can only be deserialized in
187 one chunk. However, function bodies are read function at a time
188 as needed so both calls are necessary. */
189 void (*read_summary) (void);
190 void (*function_read_summary) (struct cgraph_node *);
192 /* Results of interprocedural propagation of an IPA pass is applied to
193 function body via this hook. */
194 unsigned int function_transform_todo_flags_start;
195 unsigned int (*function_transform) (struct cgraph_node *);
196 void (*variable_transform) (struct varpool_node *);
199 /* Description of simple IPA pass. Simple IPA passes have just one execute
201 struct simple_ipa_opt_pass
203 struct opt_pass pass;
206 /* Define a tree dump switch. */
207 struct dump_file_info
209 const char *suffix; /* suffix to give output file. */
210 const char *swtch; /* command line switch */
211 const char *glob; /* command line glob */
212 int flags; /* user flags */
213 int state; /* state of play */
214 int num; /* dump file number */
217 /* Pass properties. */
218 #define PROP_gimple_any (1 << 0) /* entire gimple grammar */
219 #define PROP_gimple_lcf (1 << 1) /* lowered control flow */
220 #define PROP_gimple_leh (1 << 2) /* lowered eh */
221 #define PROP_cfg (1 << 3)
222 #define PROP_referenced_vars (1 << 4)
223 #define PROP_ssa (1 << 5)
224 #define PROP_no_crit_edges (1 << 6)
225 #define PROP_rtl (1 << 7)
226 #define PROP_alias (1 << 8)
227 #define PROP_gimple_lomp (1 << 9) /* lowered OpenMP directives */
230 (PROP_gimple_any | PROP_gimple_lcf | PROP_gimple_leh | PROP_gimple_lomp)
233 #define TODO_dump_func (1 << 0)
234 #define TODO_ggc_collect (1 << 1)
235 #define TODO_verify_ssa (1 << 2)
236 #define TODO_verify_flow (1 << 3)
237 #define TODO_verify_stmts (1 << 4)
238 #define TODO_cleanup_cfg (1 << 5)
239 #define TODO_verify_loops (1 << 6)
240 #define TODO_dump_cgraph (1 << 7)
241 #define TODO_remove_functions (1 << 8)
242 #define TODO_rebuild_frequencies (1 << 9)
243 #define TODO_verify_rtl_sharing (1 << 10)
245 /* To-do flags for calls to update_ssa. */
247 /* Update the SSA form inserting PHI nodes for newly exposed symbols
248 and virtual names marked for updating. When updating real names,
249 only insert PHI nodes for a real name O_j in blocks reached by all
250 the new and old definitions for O_j. If the iterated dominance
251 frontier for O_j is not pruned, we may end up inserting PHI nodes
252 in blocks that have one or more edges with no incoming definition
253 for O_j. This would lead to uninitialized warnings for O_j's
255 #define TODO_update_ssa (1 << 11)
257 /* Update the SSA form without inserting any new PHI nodes at all.
258 This is used by passes that have either inserted all the PHI nodes
259 themselves or passes that need only to patch use-def and def-def
260 chains for virtuals (e.g., DCE). */
261 #define TODO_update_ssa_no_phi (1 << 12)
263 /* Insert PHI nodes everywhere they are needed. No pruning of the
264 IDF is done. This is used by passes that need the PHI nodes for
265 O_j even if it means that some arguments will come from the default
266 definition of O_j's symbol (e.g., pass_linear_transform).
268 WARNING: If you need to use this flag, chances are that your pass
269 may be doing something wrong. Inserting PHI nodes for an old name
270 where not all edges carry a new replacement may lead to silent
271 codegen errors or spurious uninitialized warnings. */
272 #define TODO_update_ssa_full_phi (1 << 13)
274 /* Passes that update the SSA form on their own may want to delegate
275 the updating of virtual names to the generic updater. Since FUD
276 chains are easier to maintain, this simplifies the work they need
277 to do. NOTE: If this flag is used, any OLD->NEW mappings for real
278 names are explicitly destroyed and only the symbols marked for
279 renaming are processed. */
280 #define TODO_update_ssa_only_virtuals (1 << 14)
282 /* Some passes leave unused local variables that can be removed from
283 cfun->local_decls. This reduces the size of dump files
284 and the memory footprint for VAR_DECLs. */
285 #define TODO_remove_unused_locals (1 << 15)
287 /* Internally used for the first in a sequence of passes. It is set
288 for the passes that are handed to register_dump_files. */
289 #define TODO_set_props (1 << 16)
291 /* Call df_finish at the end of the pass. This is done after all of
292 the dumpers have been allowed to run so that they have access to
293 the instance before it is destroyed. */
294 #define TODO_df_finish (1 << 17)
296 /* Call df_verify at the end of the pass if checking is enabled. */
297 #define TODO_df_verify (1 << 18)
299 /* Internally used for the first instance of a pass. */
300 #define TODO_mark_first_instance (1 << 19)
302 /* Rebuild aliasing info. */
303 #define TODO_rebuild_alias (1 << 20)
305 #define TODO_update_ssa_any \
307 | TODO_update_ssa_no_phi \
308 | TODO_update_ssa_full_phi \
309 | TODO_update_ssa_only_virtuals)
311 #define TODO_verify_all \
312 (TODO_verify_ssa | TODO_verify_flow | TODO_verify_stmts)
314 extern void tree_lowering_passes (tree decl);
316 extern struct gimple_opt_pass pass_mudflap_1;
317 extern struct gimple_opt_pass pass_mudflap_2;
318 extern struct gimple_opt_pass pass_remove_useless_stmts;
319 extern struct gimple_opt_pass pass_lower_cf;
320 extern struct gimple_opt_pass pass_refactor_eh;
321 extern struct gimple_opt_pass pass_lower_eh;
322 extern struct gimple_opt_pass pass_build_cfg;
323 extern struct gimple_opt_pass pass_tree_profile;
324 extern struct gimple_opt_pass pass_direct_call_profile;
325 extern struct gimple_opt_pass pass_early_tree_profile;
326 extern struct gimple_opt_pass pass_tree_sample_profile;
327 extern struct gimple_opt_pass pass_tree_profile_dump;
328 extern struct gimple_opt_pass pass_cleanup_cfg;
329 extern struct gimple_opt_pass pass_referenced_vars;
330 extern struct gimple_opt_pass pass_sra;
331 extern struct gimple_opt_pass pass_sra_early;
332 extern struct gimple_opt_pass pass_tail_recursion;
333 extern struct gimple_opt_pass pass_tail_calls;
334 extern struct gimple_opt_pass pass_tree_loop;
335 extern struct gimple_opt_pass pass_tree_loop_init;
336 extern struct gimple_opt_pass pass_lim;
337 extern struct gimple_opt_pass pass_tree_unswitch;
338 extern struct gimple_opt_pass pass_predcom;
339 extern struct gimple_opt_pass pass_iv_canon;
340 extern struct gimple_opt_pass pass_scev_cprop;
341 extern struct gimple_opt_pass pass_empty_loop;
342 extern struct gimple_opt_pass pass_record_bounds;
343 extern struct gimple_opt_pass pass_graphite_transforms;
344 extern struct gimple_opt_pass pass_if_conversion;
345 extern struct gimple_opt_pass pass_loop_distribution;
346 extern struct gimple_opt_pass pass_vectorize;
347 extern struct gimple_opt_pass pass_complete_unroll;
348 extern struct gimple_opt_pass pass_complete_unrolli;
349 extern struct gimple_opt_pass pass_parallelize_loops;
350 extern struct gimple_opt_pass pass_loop_prefetch;
351 extern struct gimple_opt_pass pass_iv_optimize;
352 extern struct gimple_opt_pass pass_tree_loop_done;
353 extern struct gimple_opt_pass pass_ch;
354 extern struct gimple_opt_pass pass_ccp;
355 extern struct gimple_opt_pass pass_phi_only_cprop;
356 extern struct gimple_opt_pass pass_build_ssa;
357 extern struct gimple_opt_pass pass_del_ssa;
358 extern struct gimple_opt_pass pass_build_alias;
359 extern struct gimple_opt_pass pass_dominator;
360 extern struct gimple_opt_pass pass_dce;
361 extern struct gimple_opt_pass pass_dce_loop;
362 extern struct gimple_opt_pass pass_cd_dce;
363 extern struct gimple_opt_pass pass_call_cdce;
364 extern struct gimple_opt_pass pass_merge_phi;
365 extern struct gimple_opt_pass pass_split_crit_edges;
366 extern struct gimple_opt_pass pass_pre;
367 extern struct gimple_opt_pass pass_profile;
368 extern struct gimple_opt_pass pass_strip_predict_hints;
369 extern struct gimple_opt_pass pass_lower_complex_O0;
370 extern struct gimple_opt_pass pass_lower_complex;
371 extern struct gimple_opt_pass pass_lower_vector;
372 extern struct gimple_opt_pass pass_lower_vector_ssa;
373 extern struct gimple_opt_pass pass_lower_omp;
374 extern struct gimple_opt_pass pass_expand_omp;
375 extern struct gimple_opt_pass pass_expand_omp_ssa;
376 extern struct gimple_opt_pass pass_object_sizes;
377 extern struct gimple_opt_pass pass_fold_builtins;
378 extern struct gimple_opt_pass pass_stdarg;
379 extern struct gimple_opt_pass pass_early_warn_uninitialized;
380 extern struct gimple_opt_pass pass_late_warn_uninitialized;
381 extern struct gimple_opt_pass pass_cse_reciprocals;
382 extern struct gimple_opt_pass pass_cse_sincos;
383 extern struct gimple_opt_pass pass_convert_to_rsqrt;
384 extern struct gimple_opt_pass pass_warn_function_return;
385 extern struct gimple_opt_pass pass_warn_function_noreturn;
386 extern struct gimple_opt_pass pass_cselim;
387 extern struct gimple_opt_pass pass_phiopt;
388 extern struct gimple_opt_pass pass_forwprop;
389 extern struct gimple_opt_pass pass_phiprop;
390 extern struct gimple_opt_pass pass_tree_ifcombine;
391 extern struct gimple_opt_pass pass_dse;
392 extern struct gimple_opt_pass pass_simple_dse;
393 extern struct gimple_opt_pass pass_nrv;
394 extern struct gimple_opt_pass pass_mark_used_blocks;
395 extern struct gimple_opt_pass pass_rename_ssa_copies;
396 extern struct gimple_opt_pass pass_rest_of_compilation;
397 extern struct gimple_opt_pass pass_sink_code;
398 extern struct gimple_opt_pass pass_fre;
399 extern struct gimple_opt_pass pass_linear_transform;
400 extern struct gimple_opt_pass pass_check_data_deps;
401 extern struct gimple_opt_pass pass_copy_prop;
402 extern struct gimple_opt_pass pass_vrp;
403 extern struct gimple_opt_pass pass_uncprop;
404 extern struct gimple_opt_pass pass_return_slot;
405 extern struct gimple_opt_pass pass_reassoc;
406 extern struct gimple_opt_pass pass_lrs;
407 extern struct gimple_opt_pass pass_rebuild_cgraph_edges;
408 extern struct gimple_opt_pass pass_build_cgraph_edges;
409 extern struct gimple_opt_pass pass_reset_cc_flags;
410 extern struct gimple_opt_pass pass_threadsafe_analyze;
413 extern struct ipa_opt_pass pass_ipa_inline;
414 extern struct ipa_opt_pass pass_ipa_cp;
415 extern struct ipa_opt_pass pass_ipa_reference;
416 extern struct ipa_opt_pass pass_ipa_pure_const;
418 extern struct simple_ipa_opt_pass pass_ipa_matrix_reorg;
419 extern struct simple_ipa_opt_pass pass_ipa_early_inline;
420 extern struct simple_ipa_opt_pass pass_ipa_type_escape;
421 extern struct simple_ipa_opt_pass pass_ipa_pta;
422 extern struct simple_ipa_opt_pass pass_ipa_struct_reorg;
423 extern struct simple_ipa_opt_pass pass_early_local_passes;
424 extern struct simple_ipa_opt_pass pass_ipa_increase_alignment;
425 extern struct simple_ipa_opt_pass pass_ipa_function_and_variable_visibility;
427 extern struct gimple_opt_pass pass_all_optimizations;
428 extern struct gimple_opt_pass pass_cleanup_cfg_post_optimizing;
429 extern struct gimple_opt_pass pass_free_cfg_annotations;
430 extern struct gimple_opt_pass pass_free_datastructures;
431 extern struct gimple_opt_pass pass_init_datastructures;
432 extern struct gimple_opt_pass pass_fixup_cfg;
434 extern struct rtl_opt_pass pass_expand;
435 extern struct rtl_opt_pass pass_init_function;
436 extern struct rtl_opt_pass pass_jump;
437 extern struct rtl_opt_pass pass_rtl_eh;
438 extern struct rtl_opt_pass pass_initial_value_sets;
439 extern struct rtl_opt_pass pass_unshare_all_rtl;
440 extern struct rtl_opt_pass pass_instantiate_virtual_regs;
441 extern struct rtl_opt_pass pass_rtl_fwprop;
442 extern struct rtl_opt_pass pass_rtl_fwprop_addr;
443 extern struct rtl_opt_pass pass_jump2;
444 extern struct rtl_opt_pass pass_lower_subreg;
445 extern struct rtl_opt_pass pass_cse;
446 extern struct rtl_opt_pass pass_fast_rtl_dce;
447 extern struct rtl_opt_pass pass_ud_rtl_dce;
448 extern struct rtl_opt_pass pass_rtl_dce;
449 extern struct rtl_opt_pass pass_rtl_dse1;
450 extern struct rtl_opt_pass pass_rtl_dse2;
451 extern struct rtl_opt_pass pass_rtl_dse3;
452 extern struct rtl_opt_pass pass_gcse;
453 extern struct rtl_opt_pass pass_simplify_got;
454 extern struct rtl_opt_pass pass_jump_bypass;
455 extern struct rtl_opt_pass pass_profiling;
456 extern struct rtl_opt_pass pass_rtl_ifcvt;
457 extern struct gimple_opt_pass pass_tracer;
459 extern struct rtl_opt_pass pass_into_cfg_layout_mode;
460 extern struct rtl_opt_pass pass_outof_cfg_layout_mode;
462 extern struct rtl_opt_pass pass_loop2;
463 extern struct rtl_opt_pass pass_rtl_loop_init;
464 extern struct rtl_opt_pass pass_rtl_move_loop_invariants;
465 extern struct rtl_opt_pass pass_rtl_unswitch;
466 extern struct rtl_opt_pass pass_rtl_unroll_and_peel_loops;
467 extern struct rtl_opt_pass pass_rtl_doloop;
468 extern struct rtl_opt_pass pass_rtl_loop_done;
470 extern struct rtl_opt_pass pass_web;
471 extern struct rtl_opt_pass pass_cse2;
472 extern struct rtl_opt_pass pass_df_initialize_opt;
473 extern struct rtl_opt_pass pass_df_initialize_no_opt;
474 extern struct rtl_opt_pass pass_reginfo_init;
475 extern struct rtl_opt_pass pass_subregs_of_mode_init;
476 extern struct rtl_opt_pass pass_subregs_of_mode_finish;
477 extern struct rtl_opt_pass pass_inc_dec;
478 extern struct rtl_opt_pass pass_stack_ptr_mod;
479 extern struct rtl_opt_pass pass_initialize_regs;
480 extern struct rtl_opt_pass pass_combine;
481 extern struct rtl_opt_pass pass_if_after_combine;
482 extern struct rtl_opt_pass pass_implicit_zee;
483 extern struct rtl_opt_pass pass_partition_blocks;
484 extern struct rtl_opt_pass pass_match_asm_constraints;
485 extern struct rtl_opt_pass pass_regmove;
486 extern struct rtl_opt_pass pass_split_all_insns;
487 extern struct rtl_opt_pass pass_fast_rtl_byte_dce;
488 extern struct rtl_opt_pass pass_lower_subreg2;
489 extern struct rtl_opt_pass pass_mode_switching;
490 extern struct rtl_opt_pass pass_see;
491 extern struct rtl_opt_pass pass_sms;
492 extern struct rtl_opt_pass pass_sched;
493 extern struct rtl_opt_pass pass_ira;
494 extern struct rtl_opt_pass pass_postreload;
495 extern struct rtl_opt_pass pass_clean_state;
496 extern struct rtl_opt_pass pass_branch_prob;
497 extern struct rtl_opt_pass pass_value_profile_transformations;
498 extern struct rtl_opt_pass pass_postreload_cse;
499 extern struct rtl_opt_pass pass_gcse2;
500 extern struct rtl_opt_pass pass_split_after_reload;
501 extern struct rtl_opt_pass pass_branch_target_load_optimize1;
502 extern struct rtl_opt_pass pass_thread_prologue_and_epilogue;
503 extern struct rtl_opt_pass pass_stack_adjustments;
504 extern struct rtl_opt_pass pass_peephole2;
505 extern struct rtl_opt_pass pass_if_after_reload;
506 extern struct rtl_opt_pass pass_regrename;
507 extern struct rtl_opt_pass pass_cprop_hardreg;
508 extern struct rtl_opt_pass pass_reorder_blocks;
509 extern struct rtl_opt_pass pass_branch_target_load_optimize2;
510 extern struct rtl_opt_pass pass_leaf_regs;
511 extern struct rtl_opt_pass pass_split_before_sched2;
512 extern struct rtl_opt_pass pass_sched2;
513 extern struct rtl_opt_pass pass_stack_regs;
514 extern struct rtl_opt_pass pass_stack_regs_run;
515 extern struct rtl_opt_pass pass_df_finish;
516 extern struct rtl_opt_pass pass_compute_alignments;
517 extern struct rtl_opt_pass pass_duplicate_computed_gotos;
518 extern struct rtl_opt_pass pass_variable_tracking;
519 extern struct rtl_opt_pass pass_free_cfg;
520 extern struct rtl_opt_pass pass_machine_reorg;
521 extern struct rtl_opt_pass pass_cleanup_barriers;
522 extern struct rtl_opt_pass pass_delay_slots;
523 extern struct rtl_opt_pass pass_split_for_shorten_branches;
524 extern struct rtl_opt_pass pass_split_before_regstack;
525 extern struct rtl_opt_pass pass_convert_to_eh_region_ranges;
526 extern struct rtl_opt_pass pass_shorten_branches;
527 extern struct rtl_opt_pass pass_set_nothrow_function_flags;
528 extern struct rtl_opt_pass pass_final;
529 extern struct rtl_opt_pass pass_rtl_seqabstr;
530 extern struct gimple_opt_pass pass_release_ssa_names;
531 extern struct gimple_opt_pass pass_early_inline;
532 extern struct gimple_opt_pass pass_inline_parameters;
533 extern struct gimple_opt_pass pass_all_early_optimizations;
534 extern struct gimple_opt_pass pass_update_address_taken;
535 extern struct gimple_opt_pass pass_convert_switch;
537 /* The root of the compilation pass tree, once constructed. */
538 extern struct opt_pass *all_passes, *all_ipa_passes, *all_lowering_passes;
540 /* Current optimization pass. */
541 extern struct opt_pass *current_pass;
543 extern struct opt_pass * get_pass_for_id (int);
544 extern void execute_pass_list (struct opt_pass *);
545 extern void execute_ipa_pass_list (struct opt_pass *);
546 extern void print_current_pass (FILE *);
547 extern void debug_pass (void);
548 /* Need to expose this function externally for the plugin pass management
549 support to register dump files for new passes. */
550 extern void register_one_dump_file (struct opt_pass *);
552 /* Set to true if the pass is called the first time during compilation of the
553 current function. Note that using this information in the optimization
554 passes is considered not to be clean, and it should be avoided if possible.
555 This flag is currently used to prevent loops from being peeled repeatedly
556 in jump threading; it will be removed once we preserve loop structures
557 throughout the compilation -- we will be able to mark the affected loops
558 directly in jump threading, and avoid peeling them next time. */
559 extern bool first_pass_instance;
561 #endif /* GCC_TREE_PASS_H */