/*******************************************************************************
* 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.ssa;
import com.ibm.wala.shrikeBT.IUnaryOpInstruction;
/**
* An SSA instruction for some unary operator.
*
* @see IUnaryOpInstruction for a list of operators
*/
public class SSAUnaryOpInstruction extends SSAAbstractUnaryInstruction {
private final IUnaryOpInstruction.IOperator operator;
public SSAUnaryOpInstruction(int iindex, IUnaryOpInstruction.IOperator operator, int result, int val) {
super(iindex, result, val);
this.operator = operator;
}
@Override
public SSAInstruction copyForSSA(SSAInstructionFactory insts, int[] defs, int[] uses) throws IllegalArgumentException {
if (uses != null && uses.length == 0) {
throw new IllegalArgumentException("(uses != null) and (uses.length == 0)");
}
return insts.UnaryOpInstruction(iindex, operator, defs == null || defs.length == 0 ? result : defs[0], uses == null ? val : uses[0]);
}
@Override
public String toString(SymbolTable symbolTable) {
return getValueString(symbolTable, result) + " = " + operator + " " + getValueString(symbolTable, val);
}
/**
* @see com.ibm.wala.ssa.SSAInstruction#visit(IVisitor)
*/
@Override
public void visit(IVisitor v) throws NullPointerException {
v.visitUnaryOp(this);
}
public IUnaryOpInstruction.IOperator getOpcode() {
return operator;
}
}