#include "dominance.h"

Include dependency graph for cfg.h:

This graph shows which files directly or indirectly include this file:

Data Structures
struct	control_flow_graph

class	auto_flag< T >

class	auto_edge_flag

class	auto_bb_flag

Enumerations
enum	profile_status_d { PROFILE_ABSENT , PROFILE_GUESSED , PROFILE_READ , PROFILE_LAST }

Functions
void	init_flow (function *)

void	free_cfg (function *)

basic_block	alloc_block (void)

void	link_block (basic_block, basic_block)

void	unlink_block (basic_block)

void	compact_blocks (void)

void	expunge_block (basic_block)

edge	unchecked_make_edge (basic_block, basic_block, int)

edge	cached_make_edge (sbitmap, basic_block, basic_block, int)

edge	make_edge (basic_block, basic_block, int)

edge	make_single_succ_edge (basic_block, basic_block, int)

void	remove_edge_raw (edge)

void	redirect_edge_succ (edge, basic_block)

void	redirect_edge_pred (edge, basic_block)

void	clear_bb_flags (void)

void	dump_edge_info (FILE *, edge, dump_flags_t, int)

void	debug (edge_def &ref)

void	debug (edge_def *ptr)

void	alloc_aux_for_blocks (int)

void	clear_aux_for_blocks (void)

void	free_aux_for_blocks (void)

void	alloc_aux_for_edge (edge, int)

void	alloc_aux_for_edges (int)

void	clear_aux_for_edges (void)

void	free_aux_for_edges (void)

void	debug_bb (basic_block)

basic_block	debug_bb_n (int)

void	debug_bb (basic_block, dump_flags_t)

basic_block	debug_bb_n (int, dump_flags_t)

void	dump_bb_info (FILE *, basic_block, int, dump_flags_t, bool, bool)

void	brief_dump_cfg (FILE *, dump_flags_t)

void	set_edge_probability_and_rescale_others (edge, profile_probability)

void	update_bb_profile_for_threading (basic_block, profile_count, edge)

void	scale_bbs_frequencies_profile_count (basic_block *, int, profile_count, profile_count)

void	scale_bbs_frequencies (basic_block *, int, profile_probability)

void	initialize_original_copy_tables (void)

void	reset_original_copy_tables (void)

void	free_original_copy_tables (void)

bool	original_copy_tables_initialized_p (void)

void	set_bb_original (basic_block, basic_block)

basic_block	get_bb_original (basic_block)

void	set_bb_copy (basic_block, basic_block)

basic_block	get_bb_copy (basic_block)

void	set_loop_copy (class loop , class loop )

class loop *	get_loop_copy (class loop *)

void	scale_strictly_dominated_blocks (basic_block, profile_count, profile_count)

Enumeration Type Documentation

◆ profile_status_d

enum profile_status_d

Control flow graph manipulation code header file.
   Copyright (C) 2014-2024 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.

What sort of profiling information we have.

Enumerator
PROFILE_ABSENT
PROFILE_GUESSED
PROFILE_READ
PROFILE_LAST

Function Documentation

◆ alloc_aux_for_blocks()

void alloc_aux_for_blocks ( int size )

extern

Initialize the block_aux_obstack and if SIZE is nonzero, call
alloc_aux_for_block for each basic block.

References alloc_aux_for_block(), block_aux_obstack, cfun, first_block_aux_obj, FOR_ALL_BB_FN, gcc_assert, gcc_obstack_init, ggc_alloc(), and initialized.

Referenced by compute_branch_probabilities(), estimate_bb_frequencies(), init_pre(), init_worklist(), one_code_hoisting_pass(), sanopt_optimize(), and vt_initialize().

◆ alloc_aux_for_edge()

void alloc_aux_for_edge	(	edge	e,
		int	size )

extern

Allocate a memory edge of SIZE as E->aux.  The obstack must
be first initialized by alloc_aux_for_edges.

References edge_aux_obstack, first_edge_aux_obj, gcc_assert, and ggc_alloc().

Referenced by alloc_aux_for_edges().

◆ alloc_aux_for_edges()

void alloc_aux_for_edges ( int size )

extern

Initialize the edge_aux_obstack and if SIZE is nonzero, call
alloc_aux_for_edge for each basic edge.

References alloc_aux_for_edge(), cfun, edge_aux_obstack, ENTRY_BLOCK_PTR_FOR_FN, EXIT_BLOCK_PTR_FOR_FN, first_edge_aux_obj, FOR_BB_BETWEEN, FOR_EACH_EDGE, gcc_assert, gcc_obstack_init, ggc_alloc(), initialized, and basic_block_def::succs.

Referenced by branch_prob(), and estimate_bb_frequencies().

◆ alloc_block()

basic_block alloc_block ( void )

extern

Allocate memory for basic_block.

References basic_block_def::count, ggc_alloc(), and profile_count::uninitialized().

Referenced by create_basic_block_structure(), create_bb(), init_flow(), make_new_block(), and function_reader::parse_block().

◆ brief_dump_cfg()

void brief_dump_cfg	(	FILE *	file,
		dump_flags_t	flags )

extern

Dumps a brief description of cfg to FILE.

References cfun, dump_bb_info(), FOR_EACH_BB_FN, and TDF_DETAILS.

Referenced by gimple_dump_cfg().

◆ cached_make_edge()

edge cached_make_edge	(	sbitmap	edge_cache,
		basic_block	src,
		basic_block	dst,
		int	flags )

extern

Create an edge connecting SRC and DST with FLAGS optionally using
edge cache CACHE.  Return the new edge, NULL if already exist.

References bitmap_bit_p, bitmap_set_bit, cfun, ENTRY_BLOCK_PTR_FOR_FN, EXIT_BLOCK_PTR_FOR_FN, find_edge(), ggc_alloc(), basic_block_def::index, make_edge(), NULL, and unchecked_make_edge().

Referenced by make_edges(), and make_label_edge().

◆ clear_aux_for_blocks()

void clear_aux_for_blocks ( void )

extern

Clear AUX pointers of all blocks.

References basic_block_def::aux, cfun, FOR_ALL_BB_FN, and NULL.

Referenced by compute_antinout_edge(), compute_available(), find_comparisons(), find_spanning_tree(), free_aux_for_blocks(), get_non_trapping(), gimple_lower_bitint(), if_convert(), reorder_loops(), tree_ssa_split_loops(), and tree_ssa_unswitch_loops().

◆ clear_aux_for_edges()

void clear_aux_for_edges ( void )

extern

Clear AUX pointers of all edges.

References cfun, ENTRY_BLOCK_PTR_FOR_FN, EXIT_BLOCK_PTR_FOR_FN, FOR_BB_BETWEEN, FOR_EACH_EDGE, NULL, and basic_block_def::succs.

Referenced by compute_antinout_edge(), compute_available(), compute_laterin(), compute_nearerout(), and free_aux_for_edges().

◆ clear_bb_flags()

void clear_bb_flags ( void )

extern

Clear all basic block flags that do not have to be preserved.

References BB_FLAGS_TO_PRESERVE, cfun, current_loops, basic_block_def::flags, FOR_ALL_BB_FN, ggc_alloc(), LOOPS_HAVE_MARKED_IRREDUCIBLE_REGIONS, and loops_state_satisfies_p().

Referenced by combine_instructions(), ira(), oacc_loop_discovery(), and try_optimize_cfg().

◆ compact_blocks()

void compact_blocks ( void )

extern

Sequentially order blocks and compact the arrays.

References cfun, df, df_compact_blocks(), ENTRY_BLOCK, ENTRY_BLOCK_PTR_FOR_FN, EXIT_BLOCK, EXIT_BLOCK_PTR_FOR_FN, FOR_EACH_BB_FN, gcc_assert, i, basic_block_def::index, last_basic_block_for_fn, n_basic_blocks_for_fn, NULL, NUM_FIXED_BLOCKS, and SET_BASIC_BLOCK_FOR_FN.

Referenced by cgraph_node::analyze(), branch_prob(), cleanup_cfg(), cleanup_tree_cfg_noloop(), and relink_block_chain().

◆ debug() [1/2]

void debug ( edge_def & ref )

extern

References edge_def::dest, dump_edge_info(), ggc_alloc(), basic_block_def::index, edge_def::src, and TDF_DETAILS.

◆ debug() [2/2]

void debug ( edge_def * ptr )

extern

References debug, and ggc_alloc().

◆ debug_bb() [1/2]

void debug_bb ( basic_block bb )

extern

References debug_bb(), and dump_flags.

Referenced by debug_bb(), debug_bb_n(), debug_bb_n(), and debug_bb_slim().

◆ debug_bb() [2/2]

void debug_bb	(	basic_block	bb,
		dump_flags_t	flags )

extern

Print BB with specified FLAGS.

References dump_bb(), and ggc_alloc().

◆ debug_bb_n() [1/2]

basic_block debug_bb_n ( int n )

extern

References BASIC_BLOCK_FOR_FN, cfun, and debug_bb().

◆ debug_bb_n() [2/2]

basic_block debug_bb_n	(	int	n,
		dump_flags_t	flags )

extern

Print basic block numbered N with specified FLAGS.

References BASIC_BLOCK_FOR_FN, cfun, and debug_bb().

◆ dump_bb_info()

void dump_bb_info	(	FILE *	outf,
		basic_block	bb,
		int	indent,
		dump_flags_t	flags,
		bool	do_header,
		bool	do_footer )

extern

Dumps cfg related information about basic block BB to OUTF.
If HEADER is true, dump things that appear before the instructions
contained in BB.  If FOOTER is true, dump things that appear after.
Flags are the TDF_* masks as documented in dumpfile.h.
NB: With TDF_DETAILS, it is assumed that cfun is available, so
that maybe_hot_bb_p and probably_never_executed_bb_p don't ICE.

References alloca, BB_ALL_FLAGS, bb_loop_depth(), cfun, check_bb_profile(), basic_block_def::count, current_function_decl, DECL_STRUCT_FUNCTION, profile_count::dump(), dump_edge_info(), basic_block_def::flags, FOR_EACH_EDGE, fputc(), gcc_assert, ggc_alloc(), i, basic_block_def::index, profile_count::initialized_p(), maybe_hot_bb_p(), basic_block_def::next_bb, NULL, basic_block_def::preds, basic_block_def::prev_bb, probably_never_executed_bb_p(), basic_block_def::succs, and TDF_DETAILS.

Referenced by brief_dump_cfg(), dump_bb(), and print_rtl_with_bb().

◆ dump_edge_info()

void dump_edge_info	(	FILE *	file,
		edge	e,
		dump_flags_t	flags,
		int	do_succ )

extern

References BUILTINS_LOCATION, cfun, EDGE_ALL_FLAGS, ENTRY_BLOCK, EXIT_BLOCK, fputc(), gcc_assert, ggc_alloc(), i, LOCATION_COLUMN, LOCATION_FILE, LOCATION_LINE, LOCATION_LOCUS, NULL, TDF_DETAILS, and TDF_SLIM.

Referenced by debug(), dump_basic_block_info(), dump_bb_info(), and verify_flow_info().

◆ expunge_block()

void expunge_block ( basic_block b )

extern

Remove block B from the basic block array.

References b, cfun, n_basic_blocks_for_fn, NULL, SET_BASIC_BLOCK_FOR_FN, and unlink_block().

Referenced by delete_basic_block(), and merge_blocks().

◆ free_aux_for_blocks()

void free_aux_for_blocks ( void )

extern

Free data allocated in block_aux_obstack and clear AUX pointers
of all blocks.

References block_aux_obstack, clear_aux_for_blocks(), first_block_aux_obj, gcc_assert, ggc_alloc(), and NULL.

Referenced by compute_branch_probabilities(), delete_worklist(), estimate_bb_frequencies(), fini_pre(), one_code_hoisting_pass(), sanopt_optimize(), and vt_finalize().

◆ free_aux_for_edges()

void free_aux_for_edges ( void )

extern

Free data allocated in edge_aux_obstack and clear AUX pointers
of all edges.

References clear_aux_for_edges(), edge_aux_obstack, first_edge_aux_obj, gcc_assert, ggc_alloc(), and NULL.

Referenced by branch_prob(), and estimate_bb_frequencies().

◆ free_cfg()

void free_cfg ( struct function * fn )

extern

Free the memory associated with the CFG in FN.

References basic_block_info_for_fn, function::cfg, ENTRY_BLOCK_PTR_FOR_FN, FOR_EACH_EDGE, free_block(), free_edge(), gcc_assert, ggc_free(), n_edges_for_fn, basic_block_def::next_bb, NULL, vec_free(), control_flow_graph::x_dom_computed, and control_flow_graph::x_label_to_block_map.

Referenced by release_function_body().

◆ free_original_copy_tables()

void free_original_copy_tables ( void )

extern

Free the data structures to maintain mapping between blocks and
its copies.

References bb_copy, bb_original, loop_copy, and NULL.

Referenced by copy_loop_before(), do_split_loop_on_cond(), back_jt_path_registry::duplicate_thread_path(), gen_parallel_loop(), gimple_duplicate_seme_region(), gimple_duplicate_sese_tail(), gimple_ssa_isolate_erroneous_paths(), ipa_tm_execute(), relink_block_chain(), split_loop(), split_paths(), tail_duplicate(), tree_loop_unroll_and_jam(), tree_predictive_commoning(), tree_ssa_prefetch_arrays(), tree_unswitch_single_loop(), try_peel_loop(), try_unroll_loop_completely(), fwd_jt_path_registry::update_cfg(), vect_do_peeling(), vect_loop_versioning(), version_loop_by_alias_check(), and version_loop_for_if_conversion().

◆ get_bb_copy()

basic_block get_bb_copy ( basic_block bb )

extern

Get the copy of basic block.

References BASIC_BLOCK_FOR_FN, bb_copy, cfun, gcc_assert, hash_map< KeyId, Value, Traits >::get(), basic_block_def::index, NULL, and original_copy_tables_initialized_p().

Referenced by apply_opt_in_copies(), copy_bbs(), do_split_loop_on_cond(), back_jt_path_registry::duplicate_thread_path(), fix_loop_bb_probability(), gimple_duplicate_seme_region(), gimple_duplicate_sese_tail(), loop_version(), back_jt_path_registry::rewire_first_differing_edge(), slpeel_tree_duplicate_loop_to_edge_cfg(), split_loop(), unroll_loop_constant_iterations(), and unroll_loop_runtime_iterations().

◆ get_bb_original()

basic_block get_bb_original ( basic_block bb )

extern

Get the original basic block.

References BASIC_BLOCK_FOR_FN, bb_original, cfun, gcc_assert, hash_map< KeyId, Value, Traits >::get(), basic_block_def::index, NULL, and original_copy_tables_initialized_p().

Referenced by add_phi_args_after_copy_edge(), apply_opt_in_copies(), back_jt_path_registry::duplicate_thread_path(), gimple_duplicate_seme_region(), gimple_duplicate_sese_tail(), relink_block_chain(), tree_unswitch_single_loop(), and vect_do_peeling().

◆ get_loop_copy()

class loop * get_loop_copy ( class loop * loop )

Get the copy of LOOP.

References cfun, gcc_assert, hash_map< KeyId, Value, Traits >::get(), get_loop(), loop_copy, NULL, loop::num, and original_copy_tables_initialized_p().

Referenced by duplicate_block(), slpeel_tree_duplicate_loop_to_edge_cfg(), vect_do_peeling(), and vect_loop_versioning().

◆ init_flow()

void init_flow ( struct function * the_fun )

extern

Control flow graph manipulation code for GNU compiler.
   Copyright (C) 1987-2024 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.

This file contains low level functions to manipulate the CFG and
 analyze it.  All other modules should not transform the data structure
 directly and use abstraction instead.  The file is supposed to be
 ordered bottom-up and should not contain any code dependent on a
 particular intermediate language (RTL or trees).

 Available functionality:
   - Initialization/deallocation
       init_flow, free_cfg
   - Low level basic block manipulation
       alloc_block, expunge_block
   - Edge manipulation
       make_edge, make_single_succ_edge, cached_make_edge, remove_edge
       - Low level edge redirection (without updating instruction chain)
           redirect_edge_succ, redirect_edge_succ_nodup, redirect_edge_pred
   - Dumping and debugging
       dump_flow_info, debug_flow_info, dump_edge_info
   - Allocation of AUX fields for basic blocks
       alloc_aux_for_blocks, free_aux_for_blocks, alloc_aux_for_block
   - clear_bb_flags
   - Consistency checking
       verify_flow_info
   - Dumping and debugging
       print_rtl_with_bb, dump_bb, debug_bb, debug_bb_n

 TODO: Document these "Available functionality" functions in the files
 that implement them.

Called once at initialization time.

References alloc_block(), BB_ALL_FLAGS, EDGE_ALL_FLAGS, ENTRY_BLOCK, ENTRY_BLOCK_PTR_FOR_FN, EXIT_BLOCK, EXIT_BLOCK_PTR_FOR_FN, ggc_alloc(), n_edges_for_fn, and profile_count::uninitialized().

Referenced by init_empty_tree_cfg_for_function().

◆ initialize_original_copy_tables()

void initialize_original_copy_tables ( void )

extern

Initialize the data structures to maintain mapping between blocks
and its copies.

References bb_copy, bb_original, and loop_copy.

Referenced by cfg_layout_initialize(), copy_loop_before(), do_split_loop_on_cond(), back_jt_path_registry::duplicate_thread_path(), gen_parallel_loop(), gimple_duplicate_seme_region(), gimple_duplicate_sese_tail(), gimple_ssa_isolate_erroneous_paths(), ipa_tm_execute(), relink_block_chain(), split_loop(), split_paths(), tail_duplicate(), tree_loop_unroll_and_jam(), tree_predictive_commoning(), tree_ssa_prefetch_arrays(), tree_unswitch_single_loop(), try_peel_loop(), try_unroll_loop_completely(), fwd_jt_path_registry::update_cfg(), vect_do_peeling(), vect_loop_versioning(), version_loop_by_alias_check(), and version_loop_for_if_conversion().

◆ link_block()

void link_block	(	basic_block	b,
		basic_block	after )

extern

Link block B to chain after AFTER.

References b, ggc_alloc(), and basic_block_def::next_bb.

Referenced by create_basic_block_structure(), create_bb(), gimple_find_sub_bbs(), gimple_move_block_after(), merge_blocks_move_predecessor_nojumps(), and function_reader::parse_block().

◆ make_edge()

edge make_edge	(	basic_block	src,
		basic_block	dest,
		int	flags )

extern

Create an edge connecting SRC and DEST with flags FLAGS.  Return newly
created edge or NULL if already exist.

References find_edge(), NULL, and unchecked_make_edge().

Referenced by add_test(), branch_fixup(), branch_prob(), cached_make_edge(), cfg_layout_split_edge(), rt_bb_visited::check(), combine_blocks(), connect_infinite_loops_to_exit(), connect_loops(), convert_if_conditions_to_switch(), copy_cfg_body(), copy_edges_for_bb(), create_cond_insert_point(), create_empty_if_region_on_edge(), create_empty_loop_on_edge(), create_parallel_loop(), tree_switch_conversion::switch_decision_tree::do_jump_if_equal(), do_split_loop_on_cond(), back_jt_path_registry::duplicate_thread_path(), edge_before_returns_twice_call(), tree_switch_conversion::jump_table_cluster::emit(), tree_switch_conversion::bit_test_cluster::emit(), tree_switch_conversion::switch_decision_tree::emit_cmp_and_jump_insns(), execute_sm_if_changed(), expand_complex_div_wide(), expand_gimple_tailcall(), expand_oacc_for(), expand_omp_atomic_pipeline(), expand_omp_for_generic(), expand_omp_for_init_counts(), expand_omp_for_init_vars(), expand_omp_for_ordered_loops(), expand_omp_for_static_chunk(), expand_omp_for_static_nochunk(), expand_omp_ordered_sink(), expand_omp_sections(), expand_omp_simd(), expand_omp_target(), expand_omp_taskloop_for_inner(), expand_omp_taskloop_for_outer(), expand_omp_taskreg(), expand_parallel_call(), expand_thunk(), expand_transaction(), extract_omp_for_update_vars(), find_bb_boundaries(), force_nonfallthru_and_redirect(), tree_switch_conversion::switch_conversion::gen_inbound_check(), gimple_divmod_fixed_value(), gimple_duplicate_sese_tail(), gimple_flow_call_edges_add(), gimple_gen_ic_func_profiler(), gimple_gen_time_profiler(), gimple_ic(), gimple_lower_bitint(), gimple_mod_pow2(), gimple_mod_subtract(), gimple_stringop_fixed_value(), handle_abnormal_edges(), tree_switch_conversion::bit_test_cluster::hoist_edge_and_branch_if_true(), hoist_guard(), init_lowered_empty_function(), input_cfg(), insert_check_and_trap(), insert_cond_bb(), rt_bb_visited::insert_exit_check_on_edge(), lv_adjust_loop_entry_edge(), make_cond_expr_edges(), make_edges(), make_edges(), make_edges_bb(), make_eh_dispatch_edges(), make_eh_edge(), make_gimple_asm_edges(), make_gimple_switch_edges(), make_goto_expr_edges(), make_single_succ_edge(), move_sese_in_condition(), move_sese_region_to_fn(), oacc_entry_exit_single_gang(), omp_make_gimple_edges(), optimize_mask_stores(), peep2_attempt(), rtl_flow_call_edges_add(), shrink_wrap_one_built_in_call_with_conds(), simd_clone_adjust(), slpeel_add_loop_guard(), split_bb_make_tm_edge(), tree_transform_and_unroll_loop(), ubsan_expand_null_ifn(), ubsan_expand_ptr_ifn(), unloop_loops(), unroll_loop_runtime_iterations(), vect_loop_versioning(), worker_single_copy(), and worker_single_simple().

◆ make_single_succ_edge()

edge make_single_succ_edge	(	basic_block	src,
		basic_block	dest,
		int	flags )

extern

Create an edge connecting SRC to DEST and set probability by knowing
that it is the single edge leaving SRC.

References profile_probability::always(), and make_edge().

Referenced by add_noreturn_fake_exit_edges(), combine_blocks(), construct_exit_block(), construct_init_block(), copy_edges_for_bb(), create_cond_insert_point(), create_edge_and_update_destination_phis(), create_eh_forwarder_block(), create_parallel_loop(), dw2_build_landing_pads(), execute_sm_if_changed(), expand_complex_div_wide(), expand_gimple_cond(), expand_thunk(), fix_crossing_conditional_branches(), force_nonfallthru_and_redirect(), gimple_split_edge(), handle_simple_exit(), insert_cond_bb(), lower_resx(), move_sese_region_to_fn(), optimize_mask_stores(), rtl_split_edge(), simd_clone_adjust(), sjlj_emit_dispatch_table(), split_block_1(), split_function(), try_shrink_wrapping(), ubsan_expand_null_ifn(), and ubsan_expand_ptr_ifn().

◆ original_copy_tables_initialized_p()

bool original_copy_tables_initialized_p ( void )

extern

Return true iff we have had a call to initialize_original_copy_tables
without a corresponding call to free_original_copy_tables.

References bb_copy, and NULL.

Referenced by copy_original_table_clear(), copy_original_table_set(), get_bb_copy(), get_bb_original(), get_loop_copy(), and relink_block_chain().

◆ redirect_edge_pred()

void redirect_edge_pred	(	edge	e,
		basic_block	new_pred )

extern

Redirect an edge's predecessor from one block to another.

References connect_src(), disconnect_src(), and ggc_alloc().

Referenced by destroy_loop(), expand_transaction(), force_nonfallthru_and_redirect(), tree_switch_conversion::bit_test_cluster::hoist_edge_and_branch_if_true(), slpeel_tree_duplicate_loop_to_edge_cfg(), and unsplit_eh().

◆ redirect_edge_succ()

void redirect_edge_succ	(	edge	e,
		basic_block	new_succ )

extern

Redirect an edge's successor from one block to another.

References connect_dest(), disconnect_dest(), execute_on_growing_pred(), execute_on_shrinking_pred(), and ggc_alloc().

Referenced by cfg_layout_redirect_edge_and_branch(), cleanup_empty_eh_merge_phis(), construct_exit_block(), construct_init_block(), dead_or_predicable(), dw2_fix_up_crossing_landing_pad(), tree_switch_conversion::switch_decision_tree::emit_case_nodes(), tree_switch_conversion::switch_decision_tree::emit_jump(), execute_sm_if_changed(), expand_complex_div_wide(), expand_gimple_cond(), expand_omp_simd(), find_if_case_1(), finish_eh_generation(), fix_crossing_conditional_branches(), gimple_find_sub_bbs(), handle_simple_exit(), redirect_edge_succ_nodup(), rtl_split_edge(), simd_clone_adjust(), sjlj_fix_up_crossing_landing_pad(), try_optimize_cfg(), try_redirect_by_replacing_jump(), and tree_switch_conversion::switch_decision_tree::try_switch_expansion().

◆ remove_edge_raw()

void remove_edge_raw ( edge e )

extern

This function will remove an edge from the flow graph.

References cfun, disconnect_dest(), disconnect_src(), execute_on_shrinking_pred(), free_edge(), and remove_predictions_associated_with_edge().

Referenced by remove_edge().

◆ reset_original_copy_tables()

void reset_original_copy_tables ( void )

extern

Reset the data structures to maintain mapping between blocks and
its copies.

References bb_copy, bb_original, hash_map< KeyId, Value, Traits >::empty(), and loop_copy.

Referenced by vect_do_peeling().

◆ scale_bbs_frequencies()

void scale_bbs_frequencies	(	basic_block *	bbs,
		int	nbbs,
		profile_probability	p )

extern

Multiply all frequencies of basic blocks in array BBS of length NBBS
by NUM/DEN, in profile_count arithmetic.  More accurate than previous
function but considerably slower.

References count, ggc_alloc(), and i.

Referenced by duplicate_loop_body_to_header_edge(), hoist_guard(), scale_loop_frequencies(), and vect_do_peeling().

◆ scale_bbs_frequencies_profile_count()

void scale_bbs_frequencies_profile_count	(	basic_block *	bbs,
		int	nbbs,
		profile_count	num,
		profile_count	den )

extern

Multiply all frequencies of basic blocks in array BBS of length NBBS
by NUM/DEN, in profile_count arithmetic.  More accurate than previous
function but considerably slower.

References count, ggc_alloc(), i, and profile_count::zero().

Referenced by duplicate_loop_body_to_header_edge(), back_jt_path_registry::duplicate_thread_path(), and gimple_duplicate_sese_tail().

◆ scale_strictly_dominated_blocks()

void scale_strictly_dominated_blocks	(	basic_block	bb,
		profile_count	num,
		profile_count	den )

Scales the frequencies of all basic blocks that are strictly
dominated by BB by NUM/DEN.

References profile_count::apply_scale(), CDI_DOMINATORS, basic_block_def::count, first_dom_son(), ggc_alloc(), next_dom_son(), loop::num, worklist, and profile_count::zero().

Referenced by fold_loop_internal_call().

◆ set_bb_copy()

void set_bb_copy	(	basic_block	bb,
		basic_block	copy )

extern

Set copy for basic block.  Do nothing when data structures are not
initialized so passes not needing this don't need to care.

References bb_copy, copy_original_table_set(), and basic_block_def::index.

Referenced by duplicate_block().

◆ set_bb_original()

void set_bb_original	(	basic_block	bb,
		basic_block	original )

extern

Set original for basic block.  Do nothing when data structures are not
initialized so passes not needing this don't need to care.

References bb_original, copy_original_table_set(), ggc_alloc(), and basic_block_def::index.

Referenced by duplicate_block().

◆ set_edge_probability_and_rescale_others()

void set_edge_probability_and_rescale_others	(	edge	e,
		profile_probability	new_prob )

extern

Set probability of E to NEW_PROB and rescale other edges
from E->src so their sum remains the same.

References profile_probability::always(), dump_file, dump_flags, FOR_EACH_EDGE, ggc_alloc(), profile_probability::never(), NULL, and TDF_DETAILS.

Referenced by force_edge_cold(), scale_profile_for_vect_loop(), tree_transform_and_unroll_loop(), update_bb_profile_for_threading(), update_loop_exit_probability_scale_dom_bbs(), and update_profile_after_ch().

◆ set_loop_copy()

void set_loop_copy	(	class loop *	loop,
		class loop *	copy )

Set copy for LOOP to COPY.  Do nothing when data structures are not
initialized so passes not needing this don't need to care.

References copy_original_table_clear(), copy_original_table_set(), loop_copy, and loop::num.

Referenced by duplicate_loop(), duplicate_loop_body_to_header_edge(), back_jt_path_registry::duplicate_thread_path(), gimple_duplicate_seme_region(), gimple_duplicate_sese_tail(), loop_version(), fwd_jt_path_registry::thread_block_1(), and fwd_jt_path_registry::thread_through_loop_header().

◆ unchecked_make_edge()

edge unchecked_make_edge	(	basic_block	src,
		basic_block	dst,
		int	flags )

extern

Create an edge connecting SRC and DEST with flags FLAGS.  Return newly
created edge.  Use this only if you are sure that this edge can't
possibly already exist.

References cfun, connect_dest(), connect_src(), execute_on_growing_pred(), basic_block_def::flags, ggc_alloc(), n_edges_for_fn, and profile_probability::uninitialized().

Referenced by cached_make_edge(), function_reader::create_edges(), duplicate_block(), force_nonfallthru_and_redirect(), and make_edge().

◆ unlink_block()

void unlink_block ( basic_block b )

extern

Unlink block B from chain.

References b, and NULL.

Referenced by expunge_block(), gimple_find_sub_bbs(), gimple_move_block_after(), and merge_blocks_move_predecessor_nojumps().

◆ update_bb_profile_for_threading()

void update_bb_profile_for_threading	(	basic_block	bb,
		profile_count	count,
		edge	taken_edge )

extern

An edge originally destinating BB of COUNT has been proved to
leave the block by TAKEN_EDGE.  Update profile of BB such that edge E can be
redirected to destination of TAKEN_EDGE.

This function may leave the profile inconsistent in the case TAKEN_EDGE
frequency or count is believed to be lower than COUNT
respectively.

References profile_count::apply_scale(), basic_block_def::count, count, profile_probability::dump(), dump_file, gcc_assert, ggc_alloc(), profile_count::guessed(), basic_block_def::index, profile_count::initialized_p(), profile_probability::invert(), profile_count::nonzero_p(), set_edge_probability_and_rescale_others(), and profile_count::zero().

Referenced by back_jt_path_registry::duplicate_thread_path(), try_forward_edges(), and update_profile_after_ch().

Data Structures

Enumerations

Functions

Enumeration Type Documentation

◆ profile_status_d

Function Documentation

◆ alloc_aux_for_blocks()

◆ alloc_aux_for_edge()

◆ alloc_aux_for_edges()

◆ alloc_block()

◆ brief_dump_cfg()

◆ cached_make_edge()

◆ clear_aux_for_blocks()

◆ clear_aux_for_edges()

◆ clear_bb_flags()

◆ compact_blocks()

◆ debug() [1/2]

◆ debug() [2/2]

◆ debug_bb() [1/2]

◆ debug_bb() [2/2]

◆ debug_bb_n() [1/2]

◆ debug_bb_n() [2/2]

◆ dump_bb_info()

◆ dump_edge_info()

◆ expunge_block()

◆ free_aux_for_blocks()

◆ free_aux_for_edges()

◆ free_cfg()

◆ free_original_copy_tables()

◆ get_bb_copy()

◆ get_bb_original()

◆ get_loop_copy()

◆ init_flow()

◆ initialize_original_copy_tables()

◆ link_block()

◆ make_edge()

◆ make_single_succ_edge()

◆ original_copy_tables_initialized_p()

◆ redirect_edge_pred()

◆ redirect_edge_succ()

◆ remove_edge_raw()

◆ reset_original_copy_tables()

◆ scale_bbs_frequencies()

◆ scale_bbs_frequencies_profile_count()

◆ scale_strictly_dominated_blocks()

◆ set_bb_copy()

◆ set_bb_original()

◆ set_edge_probability_and_rescale_others()

◆ set_loop_copy()

◆ unchecked_make_edge()

◆ unlink_block()

◆ update_bb_profile_for_threading()