1/* 2 * Copyright (c) 2009, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23package org.graalvm.compiler.nodes.java; 24 25import org.graalvm.compiler.core.common.type.StampFactory; 26import org.graalvm.compiler.graph.NodeClass; 27import org.graalvm.compiler.nodeinfo.InputType; 28import org.graalvm.compiler.nodeinfo.NodeInfo; 29import org.graalvm.compiler.nodes.FrameState; 30import org.graalvm.compiler.nodes.StateSplit; 31import org.graalvm.compiler.nodes.ValueNode; 32import org.graalvm.compiler.nodes.spi.Virtualizable; 33import org.graalvm.compiler.nodes.spi.VirtualizerTool; 34import org.graalvm.compiler.nodes.virtual.VirtualInstanceNode; 35import org.graalvm.compiler.nodes.virtual.VirtualObjectNode; 36 37import jdk.vm.ci.meta.ResolvedJavaField; 38 39/** 40 * The {@code StoreFieldNode} represents a write to a static or instance field. 41 */ 42@NodeInfo(nameTemplate = "StoreField#{p#field/s}") 43public final class StoreFieldNode extends AccessFieldNode implements StateSplit, Virtualizable { 44 public static final NodeClass<StoreFieldNode> TYPE = NodeClass.create(StoreFieldNode.class); 45 46 @Input ValueNode value; 47 @OptionalInput(InputType.State) FrameState stateAfter; 48 49 @Override 50 public FrameState stateAfter() { 51 return stateAfter; 52 } 53 54 @Override 55 public void setStateAfter(FrameState x) { 56 assert x == null || x.isAlive() : "frame state must be in a graph"; 57 updateUsages(stateAfter, x); 58 stateAfter = x; 59 } 60 61 @Override 62 public boolean hasSideEffect() { 63 return true; 64 } 65 66 public ValueNode value() { 67 return value; 68 } 69 70 public StoreFieldNode(ValueNode object, ResolvedJavaField field, ValueNode value) { 71 super(TYPE, StampFactory.forVoid(), object, field); 72 this.value = value; 73 } 74 75 public StoreFieldNode(ValueNode object, ResolvedJavaField field, ValueNode value, FrameState stateAfter) { 76 super(TYPE, StampFactory.forVoid(), object, field); 77 this.value = value; 78 this.stateAfter = stateAfter; 79 } 80 81 @Override 82 public void virtualize(VirtualizerTool tool) { 83 ValueNode alias = tool.getAlias(object()); 84 if (alias instanceof VirtualObjectNode) { 85 VirtualInstanceNode virtual = (VirtualInstanceNode) alias; 86 int fieldIndex = virtual.fieldIndex(field()); 87 if (fieldIndex != -1) { 88 tool.setVirtualEntry(virtual, fieldIndex, value(), false); 89 tool.delete(); 90 } 91 } 92 } 93 94 public FrameState getState() { 95 return stateAfter; 96 } 97} 98