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
24
25
26 package org.graalvm.compiler.nodes.java;
27
28 import static org.graalvm.compiler.core.common.GraalOptions.GeneratePIC;
29
30 import org.graalvm.compiler.core.common.type.Stamp;
31 import org.graalvm.compiler.core.common.type.StampFactory;
32 import org.graalvm.compiler.core.common.type.TypeReference;
33 import org.graalvm.compiler.graph.Node;
34 import org.graalvm.compiler.graph.NodeClass;
35 import org.graalvm.compiler.graph.spi.Canonicalizable;
36 import org.graalvm.compiler.graph.spi.CanonicalizerTool;
37 import org.graalvm.compiler.nodeinfo.NodeInfo;
38 import org.graalvm.compiler.nodes.FrameState;
39 import org.graalvm.compiler.nodes.ValueNode;
40
41 import jdk.vm.ci.meta.JavaKind;
42 import jdk.vm.ci.meta.MetaAccessProvider;
43 import jdk.vm.ci.meta.ResolvedJavaType;
44
45 /**
46 * The {@code DynamicNewArrayNode} is used for allocation of arrays when the type is not a
47 * compile-time constant.
48 */
49 @NodeInfo
50 public class DynamicNewArrayNode extends AbstractNewArrayNode implements Canonicalizable {
51 public static final NodeClass<DynamicNewArrayNode> TYPE = NodeClass.create(DynamicNewArrayNode.class);
52
53 @Input ValueNode elementType;
54
55 /**
56 * Class pointer to void.class needs to be exposed earlier than this node is lowered so that it
57 * can be replaced by the AOT machinery. If it's not needed for lowering this input can be
58 * ignored.
59 */
60 @OptionalInput ValueNode voidClass;
61
62 /**
63 * A non-null value indicating the worst case element type. Mainly useful for distinguishing
64 * Object arrays from primitive arrays.
65 */
66 protected final JavaKind knownElementKind;
67
68 public DynamicNewArrayNode(ValueNode elementType, ValueNode length, boolean fillContents) {
69 this(TYPE, elementType, length, fillContents, null, null, null);
70 }
71
72 public DynamicNewArrayNode(@InjectedNodeParameter MetaAccessProvider metaAccess, ValueNode elementType, ValueNode length, boolean fillContents, JavaKind knownElementKind) {
73 this(TYPE, elementType, length, fillContents, knownElementKind, null, metaAccess);
74 }
75
76 private static Stamp computeStamp(JavaKind knownElementKind, MetaAccessProvider metaAccess) {
77 if (knownElementKind != null && metaAccess != null) {
78 ResolvedJavaType arrayType = metaAccess.lookupJavaType(knownElementKind == JavaKind.Object ? Object.class : knownElementKind.toJavaClass()).getArrayClass();
79 return StampFactory.objectNonNull(TypeReference.createWithoutAssumptions(arrayType));
80 }
81 return StampFactory.objectNonNull();
82 }
83
84 protected DynamicNewArrayNode(NodeClass<? extends DynamicNewArrayNode> c, ValueNode elementType, ValueNode length, boolean fillContents, JavaKind knownElementKind, FrameState stateBefore,
85 MetaAccessProvider metaAccess) {
86 super(c, computeStamp(knownElementKind, metaAccess), length, fillContents, stateBefore);
87 this.elementType = elementType;
88 this.knownElementKind = knownElementKind;
89 assert knownElementKind != JavaKind.Void && knownElementKind != JavaKind.Illegal;
90 }
91
92 public ValueNode getElementType() {
93 return elementType;
94 }
95
96 public JavaKind getKnownElementKind() {
97 return knownElementKind;
98 }
99
100 @Override
101 public Node canonical(CanonicalizerTool tool) {
102 if (elementType.isConstant()) {
103 if (GeneratePIC.getValue(tool.getOptions())) {
104 // Can't fold for AOT, because the resulting NewArrayNode will be missing its
105 // ResolveConstantNode for the array class.
106 return this;
107 }
108 ResolvedJavaType type = tool.getConstantReflection().asJavaType(elementType.asConstant());
109 if (type != null && !throwsIllegalArgumentException(type)) {
110 return createNewArrayNode(type);
111 }
112 }
113 return this;
114 }
115
116 /** Hook for subclasses to instantiate a subclass of {@link NewArrayNode}. */
117 protected NewArrayNode createNewArrayNode(ResolvedJavaType type) {
118 return new NewArrayNode(type, length(), fillContents(), stateBefore());
119 }
120
121 public static boolean throwsIllegalArgumentException(Class<?> elementType, Class<?> voidClass) {
122 return elementType == voidClass;
123 }
124
125 public static boolean throwsIllegalArgumentException(ResolvedJavaType elementType) {
126 return elementType.getJavaKind() == JavaKind.Void;
127 }
128
129 @NodeIntrinsic
130 private static native Object newArray(Class<?> componentType, int length, @ConstantNodeParameter boolean fillContents);
131
132 public static Object newArray(Class<?> componentType, int length) {
133 return newArray(componentType, length, true);
134 }
135
136 @NodeIntrinsic
137 private static native Object newArray(Class<?> componentType, int length, @ConstantNodeParameter boolean fillContents, @ConstantNodeParameter JavaKind knownElementKind);
138
139 public static Object newArray(Class<?> componentType, int length, JavaKind knownElementKind) {
140 return newArray(componentType, length, true, knownElementKind);
141 }
142
143 public static Object newUninitializedArray(Class<?> componentType, int length, JavaKind knownElementKind) {
144 return newArray(componentType, length, false, knownElementKind);
145 }
146
147 public ValueNode getVoidClass() {
148 return voidClass;
149 }
150
151 public void setVoidClass(ValueNode newVoidClass) {
152 updateUsages(voidClass, newVoidClass);
153 voidClass = newVoidClass;
154 }
155 }