/*
* FineGrainedCFG.java - This file is part of the Jakstab project.
* Copyright 2007-2015 Johannes Kinder <jk@jakstab.org>
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, see <http://www.gnu.org/licenses/>.
*/
package org.jakstab.cfa;
import java.util.Set;
import org.jakstab.rtl.statements.RTLAssume;
import org.jakstab.rtl.statements.RTLCallReturn;
/**
* Control flow graph that splits basic blocks after every assume, including
* calls, returns, and jumps.
*/
public class FineGrainedCFG extends ControlFlowGraph {
public FineGrainedCFG(Set<CFAEdge> edges) {
super(edges);
}
protected boolean isBasicBlockHead(Location l) {
if (super.isBasicBlockHead(l))
return true;
// Split blocks at any assume / callReturn
CFAEdge e = getInEdges(l).iterator().next();
if (e.getTransformer() instanceof RTLAssume)
return true;
if (e.getTransformer() instanceof RTLCallReturn)
return true;
return false;
}
}