110 lines
2.5 KiB
Java
110 lines
2.5 KiB
Java
/*******************************************************************************
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* Copyright (c) 2002 - 2006 IBM Corporation.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package com.ibm.wala.ssa;
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import com.ibm.wala.types.TypeReference;
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/**
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* An instruction which converts a value of one primitive type into another primitive type.
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*/
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public abstract class SSAConversionInstruction extends SSAInstruction {
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private final int result;
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private final int val;
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private final TypeReference fromType;
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private final TypeReference toType;
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protected SSAConversionInstruction(int index, int result, int val, TypeReference fromType, TypeReference toType) {
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super(index);
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this.result = result;
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this.val = val;
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this.fromType = fromType;
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this.toType = toType;
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}
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@Override
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public String toString(SymbolTable symbolTable) {
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return getValueString(symbolTable, result) + " = conversion(" + toType.getName() + ") " + getValueString(symbolTable, val);
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}
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/**
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* @see com.ibm.wala.ssa.SSAInstruction#visit(IVisitor)
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*/
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@Override
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public void visit(IVisitor v) throws NullPointerException {
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v.visitConversion(this);
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}
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/**
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* @see com.ibm.wala.ssa.SSAInstruction#getDef()
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*/
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@Override
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public boolean hasDef() {
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return true;
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}
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@Override
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public int getDef() {
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return result;
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}
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@Override
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public int getDef(int i) {
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assert i == 0;
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return result;
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}
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/**
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* @see com.ibm.wala.ssa.SSAInstruction#getNumberOfUses()
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*/
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@Override
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public int getNumberOfUses() {
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return 1;
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}
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@Override
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public int getNumberOfDefs() {
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return 1;
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}
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public TypeReference getToType() {
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return toType;
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}
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public TypeReference getFromType() {
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return fromType;
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}
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/**
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* @see com.ibm.wala.ssa.SSAInstruction#getUse(int)
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*/
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@Override
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public int getUse(int j) {
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assert j == 0;
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return val;
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}
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@Override
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public int hashCode() {
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return 6311 * result ^ val;
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}
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/*
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* @see com.ibm.wala.ssa.Instruction#isFallThrough()
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*/
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@Override
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public boolean isFallThrough() {
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return true;
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}
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}
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