/*
* 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.ir;
/**
* This operand represents, in a phi function, a control-flow path that is
* actually unreachable.
*
* @see OPT_Operand
*/
public final class OPT_UnreachableOperand extends OPT_ConstantOperand {
/**
* Return a new operand that is semantically equivalent to <code>this</code>.
*
* @return a copy of <code>this</code>
*/
public OPT_Operand copy() {
return new OPT_UnreachableOperand();
}
/**
* Are two operands semantically equivalent?
*
* @param op other operand
* @return <code>true</code> if <code>this</code> and <code>op</code>
* are semantically equivalent or <code>false</code>
* if they are not.
*/
public boolean similar(OPT_Operand op) {
return op instanceof OPT_UnreachableOperand;
}
/**
* Returns the string representation of this operand.
*
* @return a string representation of this operand.
*/
public String toString() {
return "<unreachable>";
}
}