1 /* 2 * Copyright (c) 2009, 2019, 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.InputType.State; 28 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_8; 29 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_8; 30 31 import org.graalvm.compiler.core.common.type.StampFactory; 32 import org.graalvm.compiler.graph.Node; 33 import org.graalvm.compiler.graph.NodeClass; 34 import org.graalvm.compiler.graph.spi.Canonicalizable; 35 import org.graalvm.compiler.graph.spi.CanonicalizerTool; 36 import org.graalvm.compiler.nodeinfo.InputType; 37 import org.graalvm.compiler.nodeinfo.NodeInfo; 38 import org.graalvm.compiler.nodes.DeoptimizeNode; 39 import org.graalvm.compiler.nodes.FrameState; 40 import org.graalvm.compiler.nodes.StateSplit; 41 import org.graalvm.compiler.nodes.ValueNode; 42 import org.graalvm.compiler.nodes.extended.GuardingNode; 43 import org.graalvm.compiler.nodes.spi.Lowerable; 44 import org.graalvm.compiler.nodes.spi.Virtualizable; 45 import org.graalvm.compiler.nodes.spi.VirtualizerTool; 46 import org.graalvm.compiler.nodes.type.StampTool; 47 import org.graalvm.compiler.nodes.virtual.VirtualArrayNode; 48 import org.graalvm.compiler.nodes.virtual.VirtualObjectNode; 49 50 import jdk.vm.ci.meta.DeoptimizationAction; 51 import jdk.vm.ci.meta.DeoptimizationReason; 52 import jdk.vm.ci.meta.JavaKind; 53 import jdk.vm.ci.meta.ResolvedJavaType; 54 55 /** 56 * The {@code StoreIndexedNode} represents a write to an array element. 57 */ 58 @NodeInfo(cycles = CYCLES_8, size = SIZE_8) 59 public final class StoreIndexedNode extends AccessIndexedNode implements StateSplit, Lowerable, Virtualizable, Canonicalizable { 60 61 public static final NodeClass<StoreIndexedNode> TYPE = NodeClass.create(StoreIndexedNode.class); 62 63 @OptionalInput(InputType.Guard) private GuardingNode storeCheck; 64 @Input ValueNode value; 65 @OptionalInput(State) FrameState stateAfter; 66 67 public GuardingNode getStoreCheck() { 68 return storeCheck; 69 } 70 71 @Override 72 public FrameState stateAfter() { 73 return stateAfter; 74 } 75 76 @Override 77 public void setStateAfter(FrameState x) { 78 assert x == null || x.isAlive() : "frame state must be in a graph"; 79 updateUsages(stateAfter, x); 80 stateAfter = x; 81 } 82 83 @Override 84 public boolean hasSideEffect() { 85 return true; 86 } 87 88 public ValueNode value() { 89 return value; 90 } 91 92 public StoreIndexedNode(ValueNode array, ValueNode index, GuardingNode boundsCheck, GuardingNode storeCheck, JavaKind elementKind, ValueNode value) { 93 super(TYPE, StampFactory.forVoid(), array, index, boundsCheck, elementKind); 94 this.storeCheck = storeCheck; 95 this.value = value; 96 } 97 98 @Override 99 public void virtualize(VirtualizerTool tool) { 100 ValueNode alias = tool.getAlias(array()); 101 if (alias instanceof VirtualObjectNode) { 102 ValueNode indexValue = tool.getAlias(index()); 103 int idx = indexValue.isConstant() ? indexValue.asJavaConstant().asInt() : -1; 104 VirtualArrayNode virtual = (VirtualArrayNode) alias; 105 if (idx >= 0 && idx < virtual.entryCount()) { 106 ResolvedJavaType componentType = virtual.type().getComponentType(); 107 if (componentType.isPrimitive() || StampTool.isPointerAlwaysNull(value) || componentType.isJavaLangObject() || 108 (StampTool.typeReferenceOrNull(value) != null && componentType.isAssignableFrom(StampTool.typeOrNull(value)))) { 109 tool.setVirtualEntry(virtual, idx, value()); 110 tool.delete(); 111 } 112 } 113 } 114 } 115 116 public FrameState getState() { 117 return stateAfter; 118 } 119 120 @Override 121 public Node canonical(CanonicalizerTool tool) { 122 if (array().isNullConstant()) { 123 return new DeoptimizeNode(DeoptimizationAction.InvalidateReprofile, DeoptimizationReason.NullCheckException); 124 } 125 return this; 126 } 127 }