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/* Generic dominator tree walker
Copyright (C) 2003-2015 Free Software Foundation, Inc.
Contributed by Diego Novillo <dnovillo@redhat.com>
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_DOM_WALK_H
#define GCC_DOM_WALK_H
/**
* This is the main class for the dominator walker. It is expected that
* consumers will have a custom class inheriting from it, which will over ride
* at least one of before_dom_children and after_dom_children to implement the
* custom behavior.
*/
class dom_walker
{
public:
dom_walker (cdi_direction direction) : m_dom_direction (direction) {}
/* Walk the dominator tree. */
void walk (basic_block);
/* Function to call before the recursive walk of the dominator children. */
virtual void before_dom_children (basic_block) {}
/* Function to call after the recursive walk of the dominator children. */
virtual void after_dom_children (basic_block) {}
private:
/* This is the direction of the dominator tree we want to walk. i.e.,
if it is set to CDI_DOMINATORS, then we walk the dominator tree,
if it is set to CDI_POST_DOMINATORS, then we walk the post
dominator tree. */
const ENUM_BITFIELD (cdi_direction) m_dom_direction : 2;
};
#endif
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