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.InputType.State; 26 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_8; 27 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_8; 28 29 import org.graalvm.compiler.core.common.type.StampFactory; 30 import org.graalvm.compiler.graph.NodeClass; 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.Lowerable; 36 import org.graalvm.compiler.nodes.spi.Virtualizable; 37 import org.graalvm.compiler.nodes.spi.VirtualizerTool; 38 import org.graalvm.compiler.nodes.type.StampTool; 39 import org.graalvm.compiler.nodes.virtual.VirtualArrayNode; 40 import org.graalvm.compiler.nodes.virtual.VirtualObjectNode; 41 42 import jdk.vm.ci.meta.JavaKind; 43 import jdk.vm.ci.meta.ResolvedJavaType; 44 45 /** 46 * The {@code StoreIndexedNode} represents a write to an array element. 47 */ 48 @NodeInfo(cycles = CYCLES_8, size = SIZE_8) 49 public final class StoreIndexedNode extends AccessIndexedNode implements StateSplit, Lowerable, Virtualizable { 50 51 public static final NodeClass<StoreIndexedNode> TYPE = NodeClass.create(StoreIndexedNode.class); 52 @Input ValueNode value; 53 @OptionalInput(State) FrameState stateAfter; 54 55 @Override 56 public FrameState stateAfter() { 57 return stateAfter; 58 } 59 60 @Override 61 public void setStateAfter(FrameState x) { 62 assert x == null || x.isAlive() : "frame state must be in a graph"; 63 updateUsages(stateAfter, x); 64 stateAfter = x; 65 } 66 67 @Override 68 public boolean hasSideEffect() { 69 return true; 70 } 71 72 public ValueNode value() { 73 return value; 74 } 75 76 public StoreIndexedNode(ValueNode array, ValueNode index, JavaKind elementKind, ValueNode value) { 77 super(TYPE, StampFactory.forVoid(), array, index, elementKind); 78 this.value = value; 79 } 80 81 @Override 82 public void virtualize(VirtualizerTool tool) { 83 ValueNode alias = tool.getAlias(array()); 84 if (alias instanceof VirtualObjectNode) { 85 ValueNode indexValue = tool.getAlias(index()); 86 int idx = indexValue.isConstant() ? indexValue.asJavaConstant().asInt() : -1; 87 VirtualArrayNode virtual = (VirtualArrayNode) alias; 88 if (idx >= 0 && idx < virtual.entryCount()) { 89 ResolvedJavaType componentType = virtual.type().getComponentType(); 90 if (componentType.isPrimitive() || StampTool.isPointerAlwaysNull(value) || componentType.getSuperclass() == null || 91 (StampTool.typeReferenceOrNull(value) != null && componentType.isAssignableFrom(StampTool.typeOrNull(value)))) { 92 tool.setVirtualEntry(virtual, idx, value()); 93 tool.delete(); 94 } 95 } 96 } 97 } 98 99 public FrameState getState() { 100 return stateAfter; 101 } 102 }