95 lines
2.5 KiB
Java
95 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.FieldReference;
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/**
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* A putfield or putstatic instruction
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*/
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public abstract class SSAPutInstruction extends SSAFieldAccessInstruction {
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private final int val;
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protected SSAPutInstruction(int iindex, int ref, int val, FieldReference field) {
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super(iindex, field, ref);
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this.val = val;
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}
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protected SSAPutInstruction(int iindex, int val, FieldReference field) {
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super(iindex, field, -1);
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this.val = val;
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}
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@Override
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public SSAInstruction copyForSSA(SSAInstructionFactory insts, int[] defs, int[] uses) {
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if (isStatic())
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return insts.PutInstruction(iindex, uses == null ? val : uses[0], getDeclaredField());
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else
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return insts.PutInstruction(iindex, uses == null ? getRef() : uses[0], uses == null ? val : uses[1], getDeclaredField());
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}
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@Override
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public String toString(SymbolTable symbolTable) {
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if (isStatic()) {
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return "putstatic " + getDeclaredField() + " = " + getValueString(symbolTable, val);
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} else {
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return "putfield " + getValueString(symbolTable, getRef()) + "." + getDeclaredField() + " = " + getValueString(symbolTable, val);
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}
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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 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.visitPut(this);
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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 isStatic() ? 1 : 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 == 0 || (!isStatic() && j == 1);
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return (j == 0 && !isStatic()) ? getRef() : val;
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}
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public int getVal() {
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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 val * 9929 ^ 2063;
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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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