95 lines
2.3 KiB
Java
95 lines
2.3 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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* Abstract base class for instructions that load or store from array contents.
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*/
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public abstract class SSAArrayReferenceInstruction extends SSAInstruction {
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private final int arrayref;
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private final int idx;
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private final TypeReference elementType;
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SSAArrayReferenceInstruction(int iindex, int arrayref, int index, TypeReference elementType) {
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super(iindex);
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this.arrayref = arrayref;
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this.idx = index;
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this.elementType = elementType;
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if (elementType == null) {
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throw new IllegalArgumentException("null elementType");
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}
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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 2;
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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 <= 1;
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return (j == 0) ? arrayref : idx;
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}
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/**
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* Return the value number of the array reference.
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*/
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public int getArrayRef() {
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return arrayref;
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}
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/**
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* Return the value number of the index of the array reference.
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*/
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public int getIndex() {
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return idx;
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}
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public TypeReference getElementType() {
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return elementType;
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}
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/**
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* @return true iff this represents an array access of a primitive type element
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*/
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public boolean typeIsPrimitive() {
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return elementType.isPrimitiveType();
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}
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/*
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* @see com.ibm.wala.ssa.Instruction#isPEI()
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*/
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@Override
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public boolean isPEI() {
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return true;
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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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