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 */ 23 package org.graalvm.compiler.nodes.java; 24 25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_8; 26 27 import org.graalvm.compiler.core.common.type.StampFactory; 28 import org.graalvm.compiler.graph.NodeClass; 29 import org.graalvm.compiler.nodeinfo.InputType; 30 import org.graalvm.compiler.nodeinfo.NodeCycles; 31 import org.graalvm.compiler.nodeinfo.NodeInfo; 32 import org.graalvm.compiler.nodes.FrameState; 33 import org.graalvm.compiler.nodes.StateSplit; 34 import org.graalvm.compiler.nodes.ValueNode; 35 import org.graalvm.compiler.nodes.spi.Virtualizable; 36 import org.graalvm.compiler.nodes.spi.VirtualizerTool; 37 import org.graalvm.compiler.nodes.virtual.VirtualInstanceNode; 38 import org.graalvm.compiler.nodes.virtual.VirtualObjectNode; 39 40 import jdk.vm.ci.meta.ResolvedJavaField; 41 42 /** 43 * The {@code StoreFieldNode} represents a write to a static or instance field. 44 */ 45 @NodeInfo(nameTemplate = "StoreField#{p#field/s}") 46 public final class StoreFieldNode extends AccessFieldNode implements StateSplit, Virtualizable { 47 public static final NodeClass<StoreFieldNode> TYPE = NodeClass.create(StoreFieldNode.class); 48 49 @Input ValueNode value; 50 @OptionalInput(InputType.State) FrameState stateAfter; 51 52 @Override 53 public FrameState stateAfter() { 54 return stateAfter; 55 } 56 57 @Override 58 public void setStateAfter(FrameState x) { 59 assert x == null || x.isAlive() : "frame state must be in a graph"; 60 updateUsages(stateAfter, x); 61 stateAfter = x; 62 } 63 64 @Override 65 public boolean hasSideEffect() { 66 return true; 67 } 68 69 public ValueNode value() { 70 return value; 71 } 72 73 public StoreFieldNode(ValueNode object, ResolvedJavaField field, ValueNode value) { 74 super(TYPE, StampFactory.forVoid(), object, field); 75 this.value = value; 76 } 77 78 public StoreFieldNode(ValueNode object, ResolvedJavaField field, ValueNode value, FrameState stateAfter) { 79 super(TYPE, StampFactory.forVoid(), object, field); 80 this.value = value; 81 this.stateAfter = stateAfter; 82 } 83 84 @Override 85 public void virtualize(VirtualizerTool tool) { 86 ValueNode alias = tool.getAlias(object()); 87 if (alias instanceof VirtualObjectNode) { 88 VirtualInstanceNode virtual = (VirtualInstanceNode) alias; 89 int fieldIndex = virtual.fieldIndex(field()); 90 if (fieldIndex != -1) { 91 tool.setVirtualEntry(virtual, fieldIndex, value()); 92 tool.delete(); 93 } 94 } 95 } 96 97 public FrameState getState() { 98 return stateAfter; 99 } 100 101 @Override 102 public NodeCycles estimatedNodeCycles() { 103 if (field.isVolatile()) { 104 return CYCLES_8; 105 } 106 return super.estimatedNodeCycles(); 107 } 108 }