/*******************************************************************************
* Copyright (c) 2002 - 2006 IBM Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package com.ibm.wala.ipa.cfg;
import com.ibm.wala.cfg.ControlFlowGraph;
import com.ibm.wala.ipa.callgraph.CGNode;
import com.ibm.wala.ipa.callgraph.CallGraph;
import com.ibm.wala.ssa.ISSABasicBlock;
import com.ibm.wala.ssa.SSAInstruction;
import com.ibm.wala.util.collections.Filtersection;
/**
* Interprocedural control-flow graph.
*
* TODO: think about a better implementation; perhaps a lazy view of the constituent CFGs Lots of ways this can be optimized?
*/
public class InterproceduralCFG extends AbstractInterproceduralCFG<ISSABasicBlock> {
public InterproceduralCFG(CallGraph CG) {
super(CG);
}
public InterproceduralCFG(CallGraph cg, Filtersection<CGNode> filtersection) {
super(cg, filtersection);
}
/**
* @return the cfg for n, or null if none found
* @throws IllegalArgumentException if n == null
*/
@Override
public ControlFlowGraph<SSAInstruction, ISSABasicBlock> getCFG(CGNode n) throws IllegalArgumentException {
if (n == null) {
throw new IllegalArgumentException("n == null");
}
if (n.getIR() == null) {
return null;
}
ControlFlowGraph<SSAInstruction, ISSABasicBlock> cfg = n.getIR().getControlFlowGraph();
if (cfg == null) {
return null;
}
return cfg;
}
}