90 lines
2.6 KiB
Java
90 lines
2.6 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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* SSA instruction representing an array load.
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*/
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public abstract class SSAArrayLoadInstruction extends SSAArrayReferenceInstruction {
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private final int result;
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protected SSAArrayLoadInstruction(int iindex, int result, int arrayref, int index, TypeReference elementType) {
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super(iindex, arrayref, index, elementType);
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this.result = result;
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}
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@Override
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public SSAInstruction copyForSSA(SSAInstructionFactory insts, int[] defs, int[] uses) throws IllegalArgumentException {
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if (defs != null && defs.length == 0) {
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throw new IllegalArgumentException("defs.length == 0");
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}
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if (uses != null && uses.length < 2) {
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throw new IllegalArgumentException("uses.length < 2");
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}
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return insts.ArrayLoadInstruction(iindex, defs == null ? result : defs[0], uses == null ? getArrayRef() : uses[0],
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uses == null ? getIndex() : uses[1], getElementType());
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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) + " = arrayload " + getValueString(symbolTable, getArrayRef()) + "["
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+ getValueString(symbolTable, getIndex()) + "]";
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}
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/**
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* @see com.ibm.wala.ssa.SSAInstruction#visit(IVisitor)
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* @throws IllegalArgumentException
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* if v is null
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*/
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@Override
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public void visit(IVisitor v) {
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if (v == null) {
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throw new IllegalArgumentException("v is null");
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}
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v.visitArrayLoad(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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if (i != 0) {
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throw new IllegalArgumentException("illegal i: " + i);
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}
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return result;
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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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@Override
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public int hashCode() {
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return 6311 * result ^ 2371 * getArrayRef() + getIndex();
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}
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}
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