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