53 lines
1.8 KiB
C++
53 lines
1.8 KiB
C++
/* Generic dominator tree walker
|
|
Copyright (C) 2003-2014 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
|