1 /* 2 * Copyright (c) 2009, 2018, 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 24 25 package org.graalvm.compiler.nodes.java; 26 27 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_8; 28 29 import org.graalvm.compiler.core.common.type.StampFactory; 30 import org.graalvm.compiler.graph.Node; 31 import org.graalvm.compiler.graph.NodeClass; 32 import org.graalvm.compiler.graph.spi.Canonicalizable; 33 import org.graalvm.compiler.graph.spi.CanonicalizerTool; 34 import org.graalvm.compiler.nodeinfo.InputType; 35 import org.graalvm.compiler.nodeinfo.NodeCycles; 36 import org.graalvm.compiler.nodeinfo.NodeInfo; 37 import org.graalvm.compiler.nodes.DeoptimizeNode; 38 import org.graalvm.compiler.nodes.FrameState; 39 import org.graalvm.compiler.nodes.StateSplit; 40 import org.graalvm.compiler.nodes.ValueNode; 41 import org.graalvm.compiler.nodes.spi.Virtualizable; 42 import org.graalvm.compiler.nodes.spi.VirtualizerTool; 43 import org.graalvm.compiler.nodes.virtual.VirtualInstanceNode; 44 import org.graalvm.compiler.nodes.virtual.VirtualObjectNode; 45 46 import jdk.vm.ci.meta.DeoptimizationAction; 47 import jdk.vm.ci.meta.DeoptimizationReason; 48 import jdk.vm.ci.meta.ResolvedJavaField; 49 50 /** 51 * The {@code StoreFieldNode} represents a write to a static or instance field. 52 */ 53 @NodeInfo(nameTemplate = "StoreField#{p#field/s}") 54 public final class StoreFieldNode extends AccessFieldNode implements StateSplit, Virtualizable, Canonicalizable { 55 public static final NodeClass<StoreFieldNode> TYPE = NodeClass.create(StoreFieldNode.class); 56 57 @Input ValueNode value; 58 @OptionalInput(InputType.State) FrameState stateAfter; 59 60 @Override 61 public FrameState stateAfter() { 62 return stateAfter; 63 } 64 65 @Override 66 public void setStateAfter(FrameState x) { 67 assert x == null || x.isAlive() : "frame state must be in a graph"; 68 updateUsages(stateAfter, x); 69 stateAfter = x; 70 } 71 72 @Override 73 public boolean hasSideEffect() { 74 return true; 75 } 76 77 public ValueNode value() { 78 return value; 79 } 80 81 public StoreFieldNode(ValueNode object, ResolvedJavaField field, ValueNode value) { 82 this(object, field, value, field.isVolatile()); 83 } 84 85 public StoreFieldNode(ValueNode object, ResolvedJavaField field, ValueNode value, boolean volatileAccess) { 86 super(TYPE, StampFactory.forVoid(), object, field, volatileAccess); 87 this.value = value; 88 } 89 90 public StoreFieldNode(ValueNode object, ResolvedJavaField field, ValueNode value, FrameState stateAfter, boolean volatileAccess) { 91 super(TYPE, StampFactory.forVoid(), object, field, volatileAccess); 92 this.value = value; 93 this.stateAfter = stateAfter; 94 } 95 96 @Override 97 public void virtualize(VirtualizerTool tool) { 98 ValueNode alias = tool.getAlias(object()); 99 if (alias instanceof VirtualObjectNode) { 100 VirtualInstanceNode virtual = (VirtualInstanceNode) alias; 101 int fieldIndex = virtual.fieldIndex(field()); 102 if (fieldIndex != -1) { 103 tool.setVirtualEntry(virtual, fieldIndex, value()); 104 tool.delete(); 105 } 106 } 107 } 108 109 public FrameState getState() { 110 return stateAfter; 111 } 112 113 @Override 114 public NodeCycles estimatedNodeCycles() { 115 if (isVolatile()) { 116 return CYCLES_8; 117 } 118 return super.estimatedNodeCycles(); 119 } 120 121 @Override 122 public Node canonical(CanonicalizerTool tool) { 123 if (!field.isStatic() && object.isNullConstant()) { 124 return new DeoptimizeNode(DeoptimizationAction.InvalidateReprofile, DeoptimizationReason.NullCheckException); 125 } 126 return this; 127 } 128 }