1/* 2 * Copyright (c) 2013, 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//JaCoCo Exclude 24package org.graalvm.compiler.nodes.java; 25 26import static org.graalvm.compiler.core.common.GraalOptions.GeneratePIC; 27 28import org.graalvm.compiler.core.common.type.Stamp; 29import org.graalvm.compiler.core.common.type.StampFactory; 30import org.graalvm.compiler.core.common.type.TypeReference; 31import org.graalvm.compiler.graph.Node; 32import org.graalvm.compiler.graph.NodeClass; 33import org.graalvm.compiler.graph.spi.Canonicalizable; 34import org.graalvm.compiler.graph.spi.CanonicalizerTool; 35import org.graalvm.compiler.nodeinfo.NodeInfo; 36import org.graalvm.compiler.nodes.FrameState; 37import org.graalvm.compiler.nodes.ValueNode; 38 39import jdk.vm.ci.meta.JavaKind; 40import jdk.vm.ci.meta.MetaAccessProvider; 41import jdk.vm.ci.meta.ResolvedJavaType; 42 43/** 44 * The {@code DynamicNewArrayNode} is used for allocation of arrays when the type is not a 45 * compile-time constant. 46 */ 47@NodeInfo 48public class DynamicNewArrayNode extends AbstractNewArrayNode implements Canonicalizable { 49 public static final NodeClass<DynamicNewArrayNode> TYPE = NodeClass.create(DynamicNewArrayNode.class); 50 51 @Input ValueNode elementType; 52 53 /** 54 * Class pointer to void.class needs to be exposed earlier than this node is lowered so that it 55 * can be replaced by the AOT machinery. If it's not needed for lowering this input can be 56 * ignored. 57 */ 58 @OptionalInput ValueNode voidClass; 59 60 /** 61 * A non-null value indicating the worst case element type. Mainly useful for distinguishing 62 * Object arrays from primitive arrays. 63 */ 64 protected final JavaKind knownElementKind; 65 66 public DynamicNewArrayNode(ValueNode elementType, ValueNode length, boolean fillContents) { 67 this(TYPE, elementType, length, fillContents, null, null, null); 68 } 69 70 public DynamicNewArrayNode(@InjectedNodeParameter MetaAccessProvider metaAccess, ValueNode elementType, ValueNode length, boolean fillContents, JavaKind knownElementKind) { 71 this(TYPE, elementType, length, fillContents, knownElementKind, null, metaAccess); 72 } 73 74 private static Stamp computeStamp(JavaKind knownElementKind, MetaAccessProvider metaAccess) { 75 if (knownElementKind != null && metaAccess != null) { 76 ResolvedJavaType arrayType = metaAccess.lookupJavaType(knownElementKind == JavaKind.Object ? Object.class : knownElementKind.toJavaClass()).getArrayClass(); 77 return StampFactory.objectNonNull(TypeReference.createWithoutAssumptions(arrayType)); 78 } 79 return StampFactory.objectNonNull(); 80 } 81 82 protected DynamicNewArrayNode(NodeClass<? extends DynamicNewArrayNode> c, ValueNode elementType, ValueNode length, boolean fillContents, JavaKind knownElementKind, FrameState stateBefore, 83 MetaAccessProvider metaAccess) { 84 super(c, computeStamp(knownElementKind, metaAccess), length, fillContents, stateBefore); 85 this.elementType = elementType; 86 this.knownElementKind = knownElementKind; 87 assert knownElementKind != JavaKind.Void && knownElementKind != JavaKind.Illegal; 88 } 89 90 public ValueNode getElementType() { 91 return elementType; 92 } 93 94 public JavaKind getKnownElementKind() { 95 return knownElementKind; 96 } 97 98 @Override 99 public Node canonical(CanonicalizerTool tool) { 100 if (elementType.isConstant()) { 101 if (GeneratePIC.getValue(tool.getOptions())) { 102 // Can't fold for AOT, because the resulting NewArrayNode will be missing its 103 // ResolveConstantNode for the array class. 104 return this; 105 } 106 ResolvedJavaType type = tool.getConstantReflection().asJavaType(elementType.asConstant()); 107 if (type != null && !throwsIllegalArgumentException(type)) { 108 return createNewArrayNode(type); 109 } 110 } 111 return this; 112 } 113 114 /** Hook for subclasses to instantiate a subclass of {@link NewArrayNode}. */ 115 protected NewArrayNode createNewArrayNode(ResolvedJavaType type) { 116 return new NewArrayNode(type, length(), fillContents(), stateBefore()); 117 } 118 119 public static boolean throwsIllegalArgumentException(Class<?> elementType, Class<?> voidClass) { 120 return elementType == voidClass; 121 } 122 123 public static boolean throwsIllegalArgumentException(ResolvedJavaType elementType) { 124 return elementType.getJavaKind() == JavaKind.Void; 125 } 126 127 @NodeIntrinsic 128 private static native Object newArray(Class<?> componentType, int length, @ConstantNodeParameter boolean fillContents, @ConstantNodeParameter JavaKind knownElementKind); 129 130 public static Object newArray(Class<?> componentType, int length, JavaKind knownElementKind) { 131 return newArray(componentType, length, true, knownElementKind); 132 } 133 134 public static Object newUninitializedArray(Class<?> componentType, int length, JavaKind knownElementKind) { 135 return newArray(componentType, length, false, knownElementKind); 136 } 137 138 public ValueNode getVoidClass() { 139 return voidClass; 140 } 141 142 public void setVoidClass(ValueNode newVoidClass) { 143 updateUsages(voidClass, newVoidClass); 144 voidClass = newVoidClass; 145 } 146} 147