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/* Calculate (post)dominators header file.
Copyright (C) 2014-2020 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/>. */
#ifndef GCC_DOMINANCE_H
#define GCC_DOMINANCE_H
enum cdi_direction
{
CDI_DOMINATORS = 1,
CDI_POST_DOMINATORS = 2
};
/* State of dominance information. */
enum dom_state
{
DOM_NONE, /* Not computed at all. */
DOM_NO_FAST_QUERY, /* The data is OK, but the fast query data are not usable. */
DOM_OK /* Everything is ok. */
};
extern void calculate_dominance_info (enum cdi_direction);
extern void calculate_dominance_info_for_region (enum cdi_direction,
vec<basic_block>);
extern void free_dominance_info (function *, enum cdi_direction);
extern void free_dominance_info (enum cdi_direction);
extern void free_dominance_info_for_region (function *,
enum cdi_direction,
vec<basic_block>);
extern basic_block get_immediate_dominator (enum cdi_direction, basic_block);
extern void set_immediate_dominator (enum cdi_direction, basic_block,
basic_block);
extern vec<basic_block> get_dominated_by (enum cdi_direction, basic_block);
extern vec<basic_block> get_dominated_by_region (enum cdi_direction,
basic_block *,
unsigned);
extern vec<basic_block> get_dominated_to_depth (enum cdi_direction,
basic_block, int);
extern vec<basic_block> get_all_dominated_blocks (enum cdi_direction,
basic_block);
extern void redirect_immediate_dominators (enum cdi_direction, basic_block,
basic_block);
extern basic_block nearest_common_dominator (enum cdi_direction,
basic_block, basic_block);
extern basic_block nearest_common_dominator_for_set (enum cdi_direction,
bitmap);
extern bool dominated_by_p (enum cdi_direction, const_basic_block,
const_basic_block);
unsigned bb_dom_dfs_in (enum cdi_direction, basic_block);
unsigned bb_dom_dfs_out (enum cdi_direction, basic_block);
extern void verify_dominators (enum cdi_direction);
/* Verify invariants of computed dominance information, if internal consistency
checks are enabled. */
static inline void
checking_verify_dominators (cdi_direction dir)
{
if (flag_checking)
verify_dominators (dir);
}
basic_block recompute_dominator (enum cdi_direction, basic_block);
extern void iterate_fix_dominators (enum cdi_direction,
vec<basic_block> , bool);
extern void add_to_dominance_info (enum cdi_direction, basic_block);
extern void delete_from_dominance_info (enum cdi_direction, basic_block);
extern basic_block first_dom_son (enum cdi_direction, basic_block);
extern basic_block next_dom_son (enum cdi_direction, basic_block);
extern enum dom_state dom_info_state (function *, enum cdi_direction);
extern enum dom_state dom_info_state (enum cdi_direction);
extern void set_dom_info_availability (enum cdi_direction, enum dom_state);
extern bool dom_info_available_p (function *, enum cdi_direction);
extern bool dom_info_available_p (enum cdi_direction);
#endif /* GCC_DOMINANCE_H */
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