/* Calculate (post)dominators header file.
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Copyright (C) 2014-2017 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_DOMINANCE_H
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#define GCC_DOMINANCE_H
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enum cdi_direction
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{
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CDI_DOMINATORS = 1,
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CDI_POST_DOMINATORS = 2
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};
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/* State of dominance information. */
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enum dom_state
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{
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DOM_NONE, /* Not computed at all. */
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DOM_NO_FAST_QUERY, /* The data is OK, but the fast query data are not usable. */
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DOM_OK /* Everything is ok. */
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};
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extern void calculate_dominance_info (enum cdi_direction);
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extern void calculate_dominance_info_for_region (enum cdi_direction,
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vec<basic_block>);
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extern void free_dominance_info (function *, enum cdi_direction);
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extern void free_dominance_info (enum cdi_direction);
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extern void free_dominance_info_for_region (function *,
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enum cdi_direction,
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vec<basic_block>);
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extern basic_block get_immediate_dominator (enum cdi_direction, basic_block);
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extern void set_immediate_dominator (enum cdi_direction, basic_block,
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basic_block);
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extern vec<basic_block> get_dominated_by (enum cdi_direction, basic_block);
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extern vec<basic_block> get_dominated_by_region (enum cdi_direction,
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basic_block *,
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unsigned);
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extern vec<basic_block> get_dominated_to_depth (enum cdi_direction,
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basic_block, int);
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extern vec<basic_block> get_all_dominated_blocks (enum cdi_direction,
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basic_block);
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extern void redirect_immediate_dominators (enum cdi_direction, basic_block,
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basic_block);
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extern basic_block nearest_common_dominator (enum cdi_direction,
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basic_block, basic_block);
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extern basic_block nearest_common_dominator_for_set (enum cdi_direction,
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bitmap);
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extern bool dominated_by_p (enum cdi_direction, const_basic_block,
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const_basic_block);
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unsigned bb_dom_dfs_in (enum cdi_direction, basic_block);
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unsigned bb_dom_dfs_out (enum cdi_direction, basic_block);
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extern void verify_dominators (enum cdi_direction);
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/* Verify invariants of computed dominance information, if internal consistency
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checks are enabled. */
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static inline void
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checking_verify_dominators (cdi_direction dir)
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{
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if (flag_checking)
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verify_dominators (dir);
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}
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basic_block recompute_dominator (enum cdi_direction, basic_block);
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extern void iterate_fix_dominators (enum cdi_direction,
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vec<basic_block> , bool);
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extern void add_to_dominance_info (enum cdi_direction, basic_block);
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extern void delete_from_dominance_info (enum cdi_direction, basic_block);
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extern basic_block first_dom_son (enum cdi_direction, basic_block);
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extern basic_block next_dom_son (enum cdi_direction, basic_block);
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extern enum dom_state dom_info_state (function *, enum cdi_direction);
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extern enum dom_state dom_info_state (enum cdi_direction);
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extern void set_dom_info_availability (enum cdi_direction, enum dom_state);
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extern bool dom_info_available_p (function *, enum cdi_direction);
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extern bool dom_info_available_p (enum cdi_direction);
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#endif /* GCC_DOMINANCE_H */
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