/*
* This file is part of the Jikes RVM project (http://jikesrvm.org).
*
* This file is licensed to You under the Common Public License (CPL);
* You may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.opensource.org/licenses/cpl1.0.php
*
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership.
*/
package org.jikesrvm.compilers.opt;
/**
* This class implements an edge in the value graph used in global value
* numbering
* ala Alpern, Wegman and Zadeck. See Muchnick p.348 for a nice
* discussion.
*/
final class OPT_ValueGraphEdge extends OPT_SpaceEffGraphEdge {
OPT_ValueGraphEdge(OPT_ValueGraphVertex src, OPT_ValueGraphVertex target) {
super(src, target);
}
public String toString() {
OPT_ValueGraphVertex src = (OPT_ValueGraphVertex) fromNode();
OPT_ValueGraphVertex dest = (OPT_ValueGraphVertex) toNode();
return src.getName() + " --> " + dest.getName();
}
}