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
80 extern char *get_dump_file_name (int);
81 extern int dump_enabled_p (int);
82 extern int dump_initialized_p (int);
83 extern FILE *dump_begin (int, int *);
84 extern void dump_end (int, FILE *);
85 extern void dump_node (const_tree
, int, FILE *);
86 extern int dump_switch_p (const char *);
87 extern const char *dump_flag_name (int);
89 /* Global variables used to communicate with passes. */
90 extern FILE *dump_file
;
91 extern int dump_flags
;
92 extern const char *dump_file_name
;
94 /* Return the dump_file_info for the given phase. */
95 extern struct dump_file_info
*get_dump_file_info (int);
97 /* Optimization pass type. */
106 /* Describe one pass; this is the common part shared across different pass
110 /* Optimization pass type. */
111 enum opt_pass_type type
;
113 /* Terse name of the pass used as a fragment of the dump file
114 name. If the name starts with a star, no dump happens. */
117 /* If non-null, this pass and all sub-passes are executed only if
118 the function returns true. */
121 /* This is the code to run. If null, then there should be sub-passes
122 otherwise this pass does nothing. The return value contains
123 TODOs to execute in addition to those in TODO_flags_finish. */
124 unsigned int (*execute
) (void);
126 /* A list of sub-passes to run, dependent on gate predicate. */
127 struct opt_pass
*sub
;
129 /* Next in the list of passes to run, independent of gate predicate. */
130 struct opt_pass
*next
;
132 /* Static pass number, used as a fragment of the dump file name. */
133 int static_pass_number
;
135 /* The timevar id associated with this pass. */
136 /* ??? Ideally would be dynamically assigned. */
139 /* Sets of properties input and output from this pass. */
140 unsigned int properties_required
;
141 unsigned int properties_provided
;
142 unsigned int properties_destroyed
;
144 /* Flags indicating common sets things to do before and after. */
145 unsigned int todo_flags_start
;
146 unsigned int todo_flags_finish
;
149 /* Description of GIMPLE pass. */
150 struct gimple_opt_pass
152 struct opt_pass pass
;
155 /* Description of RTL pass. */
158 struct opt_pass pass
;
163 struct cgraph_node_set_def
;
165 /* Description of IPA pass with generate summary, write, execute, read and
169 struct opt_pass pass
;
171 /* IPA passes can analyze function body and variable initializers
172 using this hook and produce summary. */
173 void (*generate_summary
) (void);
175 /* This hook is used to serialize IPA summaries on disk. */
176 void (*write_summary
) (struct cgraph_node_set_def
*);
178 /* For most ipa passes, the information can only be deserialized in
179 one chunk. However, function bodies are read function at a time
180 as needed so both calls are necessary. */
181 void (*read_summary
) (void);
182 void (*function_read_summary
) (struct cgraph_node
*);
184 /* Results of interprocedural propagation of an IPA pass is applied to
185 function body via this hook. */
186 unsigned int function_transform_todo_flags_start
;
187 unsigned int (*function_transform
) (struct cgraph_node
*);
188 void (*variable_transform
) (struct varpool_node
*);
191 /* Description of simple IPA pass. Simple IPA passes have just one execute
193 struct simple_ipa_opt_pass
195 struct opt_pass pass
;
198 /* Define a tree dump switch. */
199 struct dump_file_info
201 const char *suffix
; /* suffix to give output file. */
202 const char *swtch
; /* command line switch */
203 const char *glob
; /* command line glob */
204 int flags
; /* user flags */
205 int state
; /* state of play */
206 int num
; /* dump file number */
209 /* Pass properties. */
210 #define PROP_gimple_any (1 << 0) /* entire gimple grammar */
211 #define PROP_gimple_lcf (1 << 1) /* lowered control flow */
212 #define PROP_gimple_leh (1 << 2) /* lowered eh */
213 #define PROP_cfg (1 << 3)
214 #define PROP_referenced_vars (1 << 4)
215 #define PROP_ssa (1 << 5)
216 #define PROP_no_crit_edges (1 << 6)
217 #define PROP_rtl (1 << 7)
218 #define PROP_gimple_lomp (1 << 8) /* lowered OpenMP directives */
219 #define PROP_cfglayout (1 << 9) /* cfglayout mode on RTL */
222 (PROP_gimple_any | PROP_gimple_lcf | PROP_gimple_leh | PROP_gimple_lomp)
225 #define TODO_dump_func (1 << 0)
226 #define TODO_ggc_collect (1 << 1)
227 #define TODO_verify_ssa (1 << 2)
228 #define TODO_verify_flow (1 << 3)
229 #define TODO_verify_stmts (1 << 4)
230 #define TODO_cleanup_cfg (1 << 5)
231 #define TODO_verify_loops (1 << 6)
232 #define TODO_dump_cgraph (1 << 7)
233 #define TODO_remove_functions (1 << 8)
234 #define TODO_rebuild_frequencies (1 << 9)
235 #define TODO_verify_rtl_sharing (1 << 10)
237 /* To-do flags for calls to update_ssa. */
239 /* Update the SSA form inserting PHI nodes for newly exposed symbols
240 and virtual names marked for updating. When updating real names,
241 only insert PHI nodes for a real name O_j in blocks reached by all
242 the new and old definitions for O_j. If the iterated dominance
243 frontier for O_j is not pruned, we may end up inserting PHI nodes
244 in blocks that have one or more edges with no incoming definition
245 for O_j. This would lead to uninitialized warnings for O_j's
247 #define TODO_update_ssa (1 << 11)
249 /* Update the SSA form without inserting any new PHI nodes at all.
250 This is used by passes that have either inserted all the PHI nodes
251 themselves or passes that need only to patch use-def and def-def
252 chains for virtuals (e.g., DCE). */
253 #define TODO_update_ssa_no_phi (1 << 12)
255 /* Insert PHI nodes everywhere they are needed. No pruning of the
256 IDF is done. This is used by passes that need the PHI nodes for
257 O_j even if it means that some arguments will come from the default
258 definition of O_j's symbol (e.g., pass_linear_transform).
260 WARNING: If you need to use this flag, chances are that your pass
261 may be doing something wrong. Inserting PHI nodes for an old name
262 where not all edges carry a new replacement may lead to silent
263 codegen errors or spurious uninitialized warnings. */
264 #define TODO_update_ssa_full_phi (1 << 13)
266 /* Passes that update the SSA form on their own may want to delegate
267 the updating of virtual names to the generic updater. Since FUD
268 chains are easier to maintain, this simplifies the work they need
269 to do. NOTE: If this flag is used, any OLD->NEW mappings for real
270 names are explicitly destroyed and only the symbols marked for
271 renaming are processed. */
272 #define TODO_update_ssa_only_virtuals (1 << 14)
274 /* Some passes leave unused local variables that can be removed from
275 cfun->local_decls. This reduces the size of dump files
276 and the memory footprint for VAR_DECLs. */
277 #define TODO_remove_unused_locals (1 << 15)
279 /* Internally used for the first in a sequence of passes. It is set
280 for the passes that are handed to register_dump_files. */
281 #define TODO_set_props (1 << 16)
283 /* Call df_finish at the end of the pass. This is done after all of
284 the dumpers have been allowed to run so that they have access to
285 the instance before it is destroyed. */
286 #define TODO_df_finish (1 << 17)
288 /* Call df_verify at the end of the pass if checking is enabled. */
289 #define TODO_df_verify (1 << 18)
291 /* Internally used for the first instance of a pass. */
292 #define TODO_mark_first_instance (1 << 19)
294 /* Rebuild aliasing info. */
295 #define TODO_rebuild_alias (1 << 20)
297 /* Rebuild the addressable-vars bitmap and do register promotion. */
298 #define TODO_update_address_taken (1 << 21)
300 #define TODO_update_ssa_any \
302 | TODO_update_ssa_no_phi \
303 | TODO_update_ssa_full_phi \
304 | TODO_update_ssa_only_virtuals)
306 #define TODO_verify_all \
307 (TODO_verify_ssa | TODO_verify_flow | TODO_verify_stmts)
309 extern void tree_lowering_passes (tree decl
);
311 extern struct gimple_opt_pass pass_mudflap_1
;
312 extern struct gimple_opt_pass pass_mudflap_2
;
313 extern struct gimple_opt_pass pass_remove_useless_stmts
;
314 extern struct gimple_opt_pass pass_lower_cf
;
315 extern struct gimple_opt_pass pass_refactor_eh
;
316 extern struct gimple_opt_pass pass_lower_eh
;
317 extern struct gimple_opt_pass pass_build_cfg
;
318 extern struct gimple_opt_pass pass_tree_profile
;
319 extern struct gimple_opt_pass pass_early_tree_profile
;
320 extern struct gimple_opt_pass pass_cleanup_cfg
;
321 extern struct gimple_opt_pass pass_referenced_vars
;
322 extern struct gimple_opt_pass pass_cleanup_eh
;
323 extern struct gimple_opt_pass pass_fixup_cfg
;
324 extern struct gimple_opt_pass pass_sra
;
325 extern struct gimple_opt_pass pass_sra_early
;
326 extern struct gimple_opt_pass pass_tail_recursion
;
327 extern struct gimple_opt_pass pass_tail_calls
;
328 extern struct gimple_opt_pass pass_tree_loop
;
329 extern struct gimple_opt_pass pass_tree_loop_init
;
330 extern struct gimple_opt_pass pass_lim
;
331 extern struct gimple_opt_pass pass_tree_unswitch
;
332 extern struct gimple_opt_pass pass_predcom
;
333 extern struct gimple_opt_pass pass_iv_canon
;
334 extern struct gimple_opt_pass pass_scev_cprop
;
335 extern struct gimple_opt_pass pass_empty_loop
;
336 extern struct gimple_opt_pass pass_record_bounds
;
337 extern struct gimple_opt_pass pass_graphite_transforms
;
338 extern struct gimple_opt_pass pass_if_conversion
;
339 extern struct gimple_opt_pass pass_loop_distribution
;
340 extern struct gimple_opt_pass pass_vectorize
;
341 extern struct gimple_opt_pass pass_complete_unroll
;
342 extern struct gimple_opt_pass pass_complete_unrolli
;
343 extern struct gimple_opt_pass pass_parallelize_loops
;
344 extern struct gimple_opt_pass pass_loop_prefetch
;
345 extern struct gimple_opt_pass pass_iv_optimize
;
346 extern struct gimple_opt_pass pass_tree_loop_done
;
347 extern struct gimple_opt_pass pass_ch
;
348 extern struct gimple_opt_pass pass_ccp
;
349 extern struct gimple_opt_pass pass_phi_only_cprop
;
350 extern struct gimple_opt_pass pass_build_ssa
;
351 extern struct gimple_opt_pass pass_build_alias
;
352 extern struct gimple_opt_pass pass_dominator
;
353 extern struct gimple_opt_pass pass_dce
;
354 extern struct gimple_opt_pass pass_dce_loop
;
355 extern struct gimple_opt_pass pass_cd_dce
;
356 extern struct gimple_opt_pass pass_call_cdce
;
357 extern struct gimple_opt_pass pass_merge_phi
;
358 extern struct gimple_opt_pass pass_split_crit_edges
;
359 extern struct gimple_opt_pass pass_pre
;
360 extern struct gimple_opt_pass pass_profile
;
361 extern struct gimple_opt_pass pass_strip_predict_hints
;
362 extern struct gimple_opt_pass pass_lower_complex_O0
;
363 extern struct gimple_opt_pass pass_lower_complex
;
364 extern struct gimple_opt_pass pass_lower_vector
;
365 extern struct gimple_opt_pass pass_lower_vector_ssa
;
366 extern struct gimple_opt_pass pass_lower_omp
;
367 extern struct gimple_opt_pass pass_expand_omp
;
368 extern struct gimple_opt_pass pass_expand_omp_ssa
;
369 extern struct gimple_opt_pass pass_object_sizes
;
370 extern struct gimple_opt_pass pass_fold_builtins
;
371 extern struct gimple_opt_pass pass_stdarg
;
372 extern struct gimple_opt_pass pass_early_warn_uninitialized
;
373 extern struct gimple_opt_pass pass_late_warn_uninitialized
;
374 extern struct gimple_opt_pass pass_cse_reciprocals
;
375 extern struct gimple_opt_pass pass_cse_sincos
;
376 extern struct gimple_opt_pass pass_convert_to_rsqrt
;
377 extern struct gimple_opt_pass pass_warn_function_return
;
378 extern struct gimple_opt_pass pass_warn_function_noreturn
;
379 extern struct gimple_opt_pass pass_cselim
;
380 extern struct gimple_opt_pass pass_phiopt
;
381 extern struct gimple_opt_pass pass_forwprop
;
382 extern struct gimple_opt_pass pass_phiprop
;
383 extern struct gimple_opt_pass pass_tree_ifcombine
;
384 extern struct gimple_opt_pass pass_dse
;
385 extern struct gimple_opt_pass pass_nrv
;
386 extern struct gimple_opt_pass pass_rename_ssa_copies
;
387 extern struct gimple_opt_pass pass_rest_of_compilation
;
388 extern struct gimple_opt_pass pass_sink_code
;
389 extern struct gimple_opt_pass pass_fre
;
390 extern struct gimple_opt_pass pass_linear_transform
;
391 extern struct gimple_opt_pass pass_check_data_deps
;
392 extern struct gimple_opt_pass pass_copy_prop
;
393 extern struct gimple_opt_pass pass_vrp
;
394 extern struct gimple_opt_pass pass_uncprop
;
395 extern struct gimple_opt_pass pass_return_slot
;
396 extern struct gimple_opt_pass pass_reassoc
;
397 extern struct gimple_opt_pass pass_rebuild_cgraph_edges
;
398 extern struct gimple_opt_pass pass_remove_cgraph_callee_edges
;
399 extern struct gimple_opt_pass pass_build_cgraph_edges
;
400 extern struct gimple_opt_pass pass_local_pure_const
;
401 extern struct gimple_opt_pass pass_tracer
;
404 extern struct ipa_opt_pass pass_ipa_inline
;
405 extern struct ipa_opt_pass pass_ipa_cp
;
406 extern struct ipa_opt_pass pass_ipa_reference
;
407 extern struct ipa_opt_pass pass_ipa_pure_const
;
409 extern struct simple_ipa_opt_pass pass_ipa_matrix_reorg
;
410 extern struct simple_ipa_opt_pass pass_ipa_early_inline
;
411 extern struct simple_ipa_opt_pass pass_ipa_type_escape
;
412 extern struct simple_ipa_opt_pass pass_ipa_pta
;
413 extern struct simple_ipa_opt_pass pass_ipa_struct_reorg
;
414 extern struct simple_ipa_opt_pass pass_early_local_passes
;
415 extern struct simple_ipa_opt_pass pass_ipa_increase_alignment
;
416 extern struct simple_ipa_opt_pass pass_ipa_function_and_variable_visibility
;
418 extern struct gimple_opt_pass pass_all_optimizations
;
419 extern struct gimple_opt_pass pass_cleanup_cfg_post_optimizing
;
420 extern struct gimple_opt_pass pass_init_datastructures
;
421 extern struct gimple_opt_pass pass_fixup_cfg
;
423 extern struct rtl_opt_pass pass_expand
;
424 extern struct rtl_opt_pass pass_init_function
;
425 extern struct rtl_opt_pass pass_jump
;
426 extern struct rtl_opt_pass pass_rtl_eh
;
427 extern struct rtl_opt_pass pass_initial_value_sets
;
428 extern struct rtl_opt_pass pass_unshare_all_rtl
;
429 extern struct rtl_opt_pass pass_instantiate_virtual_regs
;
430 extern struct rtl_opt_pass pass_rtl_fwprop
;
431 extern struct rtl_opt_pass pass_rtl_fwprop_addr
;
432 extern struct rtl_opt_pass pass_jump2
;
433 extern struct rtl_opt_pass pass_lower_subreg
;
434 extern struct rtl_opt_pass pass_cse
;
435 extern struct rtl_opt_pass pass_fast_rtl_dce
;
436 extern struct rtl_opt_pass pass_ud_rtl_dce
;
437 extern struct rtl_opt_pass pass_rtl_dce
;
438 extern struct rtl_opt_pass pass_rtl_dse1
;
439 extern struct rtl_opt_pass pass_rtl_dse2
;
440 extern struct rtl_opt_pass pass_rtl_dse3
;
441 extern struct rtl_opt_pass pass_rtl_cprop
;
442 extern struct rtl_opt_pass pass_rtl_pre
;
443 extern struct rtl_opt_pass pass_rtl_hoist
;
444 extern struct rtl_opt_pass pass_rtl_store_motion
;
445 extern struct rtl_opt_pass pass_cse_after_global_opts
;
446 extern struct rtl_opt_pass pass_rtl_ifcvt
;
448 extern struct rtl_opt_pass pass_into_cfg_layout_mode
;
449 extern struct rtl_opt_pass pass_outof_cfg_layout_mode
;
451 extern struct rtl_opt_pass pass_loop2
;
452 extern struct rtl_opt_pass pass_rtl_loop_init
;
453 extern struct rtl_opt_pass pass_rtl_move_loop_invariants
;
454 extern struct rtl_opt_pass pass_rtl_unswitch
;
455 extern struct rtl_opt_pass pass_rtl_unroll_and_peel_loops
;
456 extern struct rtl_opt_pass pass_rtl_doloop
;
457 extern struct rtl_opt_pass pass_rtl_loop_done
;
459 extern struct rtl_opt_pass pass_web
;
460 extern struct rtl_opt_pass pass_cse2
;
461 extern struct rtl_opt_pass pass_df_initialize_opt
;
462 extern struct rtl_opt_pass pass_df_initialize_no_opt
;
463 extern struct rtl_opt_pass pass_reginfo_init
;
464 extern struct rtl_opt_pass pass_subregs_of_mode_init
;
465 extern struct rtl_opt_pass pass_subregs_of_mode_finish
;
466 extern struct rtl_opt_pass pass_inc_dec
;
467 extern struct rtl_opt_pass pass_stack_ptr_mod
;
468 extern struct rtl_opt_pass pass_initialize_regs
;
469 extern struct rtl_opt_pass pass_combine
;
470 extern struct rtl_opt_pass pass_if_after_combine
;
471 extern struct rtl_opt_pass pass_partition_blocks
;
472 extern struct rtl_opt_pass pass_match_asm_constraints
;
473 extern struct rtl_opt_pass pass_regmove
;
474 extern struct rtl_opt_pass pass_split_all_insns
;
475 extern struct rtl_opt_pass pass_fast_rtl_byte_dce
;
476 extern struct rtl_opt_pass pass_lower_subreg2
;
477 extern struct rtl_opt_pass pass_mode_switching
;
478 extern struct rtl_opt_pass pass_see
;
479 extern struct rtl_opt_pass pass_sms
;
480 extern struct rtl_opt_pass pass_sched
;
481 extern struct rtl_opt_pass pass_ira
;
482 extern struct rtl_opt_pass pass_postreload
;
483 extern struct rtl_opt_pass pass_clean_state
;
484 extern struct rtl_opt_pass pass_branch_prob
;
485 extern struct rtl_opt_pass pass_value_profile_transformations
;
486 extern struct rtl_opt_pass pass_postreload_cse
;
487 extern struct rtl_opt_pass pass_gcse2
;
488 extern struct rtl_opt_pass pass_split_after_reload
;
489 extern struct rtl_opt_pass pass_branch_target_load_optimize1
;
490 extern struct rtl_opt_pass pass_thread_prologue_and_epilogue
;
491 extern struct rtl_opt_pass pass_stack_adjustments
;
492 extern struct rtl_opt_pass pass_peephole2
;
493 extern struct rtl_opt_pass pass_if_after_reload
;
494 extern struct rtl_opt_pass pass_regrename
;
495 extern struct rtl_opt_pass pass_cprop_hardreg
;
496 extern struct rtl_opt_pass pass_reorder_blocks
;
497 extern struct rtl_opt_pass pass_branch_target_load_optimize2
;
498 extern struct rtl_opt_pass pass_leaf_regs
;
499 extern struct rtl_opt_pass pass_split_before_sched2
;
500 extern struct rtl_opt_pass pass_sched2
;
501 extern struct rtl_opt_pass pass_stack_regs
;
502 extern struct rtl_opt_pass pass_stack_regs_run
;
503 extern struct rtl_opt_pass pass_df_finish
;
504 extern struct rtl_opt_pass pass_compute_alignments
;
505 extern struct rtl_opt_pass pass_duplicate_computed_gotos
;
506 extern struct rtl_opt_pass pass_variable_tracking
;
507 extern struct rtl_opt_pass pass_free_cfg
;
508 extern struct rtl_opt_pass pass_machine_reorg
;
509 extern struct rtl_opt_pass pass_cleanup_barriers
;
510 extern struct rtl_opt_pass pass_delay_slots
;
511 extern struct rtl_opt_pass pass_split_for_shorten_branches
;
512 extern struct rtl_opt_pass pass_split_before_regstack
;
513 extern struct rtl_opt_pass pass_convert_to_eh_region_ranges
;
514 extern struct rtl_opt_pass pass_shorten_branches
;
515 extern struct rtl_opt_pass pass_set_nothrow_function_flags
;
516 extern struct rtl_opt_pass pass_final
;
517 extern struct rtl_opt_pass pass_rtl_seqabstr
;
518 extern struct gimple_opt_pass pass_release_ssa_names
;
519 extern struct gimple_opt_pass pass_early_inline
;
520 extern struct gimple_opt_pass pass_inline_parameters
;
521 extern struct gimple_opt_pass pass_all_early_optimizations
;
522 extern struct gimple_opt_pass pass_update_address_taken
;
523 extern struct gimple_opt_pass pass_convert_switch
;
525 /* The root of the compilation pass tree, once constructed. */
526 extern struct opt_pass
*all_passes
, *all_ipa_passes
, *all_lowering_passes
;
528 /* Current optimization pass. */
529 extern struct opt_pass
*current_pass
;
531 extern struct opt_pass
* get_pass_for_id (int);
532 extern void execute_pass_list (struct opt_pass
*);
533 extern void execute_ipa_pass_list (struct opt_pass
*);
534 extern void print_current_pass (FILE *);
535 extern void debug_pass (void);
536 extern void register_one_dump_file (struct opt_pass
*);
537 extern bool function_called_by_processed_nodes_p (void);
539 /* Set to true if the pass is called the first time during compilation of the
540 current function. Note that using this information in the optimization
541 passes is considered not to be clean, and it should be avoided if possible.
542 This flag is currently used to prevent loops from being peeled repeatedly
543 in jump threading; it will be removed once we preserve loop structures
544 throughout the compilation -- we will be able to mark the affected loops
545 directly in jump threading, and avoid peeling them next time. */
546 extern bool first_pass_instance
;
548 #endif /* GCC_TREE_PASS_H */