1 /*
2 * Copyright (c) 2015, 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.hotspot.meta;
26
27 import static org.graalvm.compiler.core.common.GraalOptions.ImmutableCode;
28
29 import org.graalvm.compiler.core.common.type.StampPair;
30 import org.graalvm.compiler.nodes.ConstantNode;
31 import org.graalvm.compiler.nodes.ValueNode;
32 import org.graalvm.compiler.nodes.extended.GuardingNode;
33 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext;
34 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderTool;
35 import org.graalvm.compiler.nodes.graphbuilderconf.InlineInvokePlugin;
36 import org.graalvm.compiler.nodes.graphbuilderconf.NodePlugin;
37 import org.graalvm.compiler.nodes.graphbuilderconf.TypePlugin;
38 import org.graalvm.compiler.nodes.util.ConstantFoldUtil;
39 import org.graalvm.compiler.word.Word;
40 import org.graalvm.compiler.word.WordOperationPlugin;
41
42 import jdk.vm.ci.meta.JavaConstant;
43 import jdk.vm.ci.meta.JavaKind;
44 import jdk.vm.ci.meta.JavaType;
45 import jdk.vm.ci.meta.JavaTypeProfile;
46 import jdk.vm.ci.meta.ResolvedJavaField;
47 import jdk.vm.ci.meta.ResolvedJavaMethod;
48 import jdk.vm.ci.meta.ResolvedJavaType;
49
50 /**
51 * This plugin handles the HotSpot-specific customizations of bytecode parsing:
52 * <p>
53 * {@link Word}-type rewriting for {@link GraphBuilderContext#parsingIntrinsic intrinsic} functions
54 * (snippets and method substitutions), by forwarding to the {@link WordOperationPlugin}. Note that
55 * we forward the {@link NodePlugin} and {@link TypePlugin} methods, but not the
56 * {@link InlineInvokePlugin} methods implemented by {@link WordOperationPlugin}. The latter is not
57 * necessary because HotSpot only uses the {@link Word} type in methods that are force-inlined,
58 * i.e., there are never non-inlined invokes that involve the {@link Word} type.
59 * <p>
60 * Constant folding of field loads.
61 */
62 public final class HotSpotNodePlugin implements NodePlugin, TypePlugin {
63 protected final WordOperationPlugin wordOperationPlugin;
64
65 public HotSpotNodePlugin(WordOperationPlugin wordOperationPlugin) {
66 this.wordOperationPlugin = wordOperationPlugin;
67 }
68
69 @Override
70 public boolean canChangeStackKind(GraphBuilderContext b) {
71 if (b.parsingIntrinsic()) {
72 return wordOperationPlugin.canChangeStackKind(b);
73 }
74 return false;
75 }
76
77 @Override
78 public StampPair interceptType(GraphBuilderTool b, JavaType declaredType, boolean nonNull) {
79 if (b.parsingIntrinsic()) {
80 return wordOperationPlugin.interceptType(b, declaredType, nonNull);
81 }
82 return null;
83 }
84
85 @Override
86 public boolean handleInvoke(GraphBuilderContext b, ResolvedJavaMethod method, ValueNode[] args) {
87 if (b.parsingIntrinsic() && wordOperationPlugin.handleInvoke(b, method, args)) {
88 return true;
89 }
90 return false;
91 }
92
93 @Override
94 public boolean handleLoadField(GraphBuilderContext b, ValueNode object, ResolvedJavaField field) {
95 if (!ImmutableCode.getValue(b.getOptions()) || b.parsingIntrinsic()) {
96 if (object.isConstant()) {
97 JavaConstant asJavaConstant = object.asJavaConstant();
98 if (tryReadField(b, field, asJavaConstant)) {
99 return true;
100 }
101 }
102 }
103 if (b.parsingIntrinsic() && wordOperationPlugin.handleLoadField(b, object, field)) {
104 return true;
105 }
106 return false;
107 }
108
109 @Override
110 public boolean handleLoadStaticField(GraphBuilderContext b, ResolvedJavaField field) {
111 if (!ImmutableCode.getValue(b.getOptions()) || b.parsingIntrinsic()) {
112 if (tryReadField(b, field, null)) {
113 return true;
114 }
115 }
116 if (b.parsingIntrinsic() && wordOperationPlugin.handleLoadStaticField(b, field)) {
117 return true;
118 }
119 return false;
120 }
121
122 private static boolean tryReadField(GraphBuilderContext b, ResolvedJavaField field, JavaConstant object) {
123 return tryConstantFold(b, field, object);
124 }
125
126 private static boolean tryConstantFold(GraphBuilderContext b, ResolvedJavaField field, JavaConstant object) {
127 ConstantNode result = ConstantFoldUtil.tryConstantFold(b.getConstantFieldProvider(), b.getConstantReflection(), b.getMetaAccess(), field, object, b.getOptions());
128 if (result != null) {
129 result = b.getGraph().unique(result);
130 b.push(field.getJavaKind(), result);
131 return true;
132 }
133 return false;
134 }
135
136 @Override
137 public boolean handleStoreField(GraphBuilderContext b, ValueNode object, ResolvedJavaField field, ValueNode value) {
138 if (b.parsingIntrinsic() && wordOperationPlugin.handleStoreField(b, object, field, value)) {
139 return true;
140 }
141 return false;
142 }
143
144 @Override
145 public boolean handleStoreStaticField(GraphBuilderContext b, ResolvedJavaField field, ValueNode value) {
146 if (b.parsingIntrinsic() && wordOperationPlugin.handleStoreStaticField(b, field, value)) {
147 return true;
148 }
149 return false;
150 }
151
152 @Override
153 public boolean handleLoadIndexed(GraphBuilderContext b, ValueNode array, ValueNode index, GuardingNode boundsCheck, JavaKind elementKind) {
154 if (b.parsingIntrinsic() && wordOperationPlugin.handleLoadIndexed(b, array, index, boundsCheck, elementKind)) {
155 return true;
156 }
157 return false;
158 }
159
160 @Override
161 public boolean handleStoreIndexed(GraphBuilderContext b, ValueNode array, ValueNode index, GuardingNode boundsCheck, GuardingNode storeCheck, JavaKind elementKind, ValueNode value) {
162 if (b.parsingIntrinsic() && wordOperationPlugin.handleStoreIndexed(b, array, index, boundsCheck, storeCheck, elementKind, value)) {
163 return true;
164 }
165 return false;
166 }
167
168 @Override
169 public boolean handleCheckCast(GraphBuilderContext b, ValueNode object, ResolvedJavaType type, JavaTypeProfile profile) {
170 if (b.parsingIntrinsic() && wordOperationPlugin.handleCheckCast(b, object, type, profile)) {
171 return true;
172 }
173 return false;
174 }
175
176 @Override
177 public boolean handleInstanceOf(GraphBuilderContext b, ValueNode object, ResolvedJavaType type, JavaTypeProfile profile) {
178 if (b.parsingIntrinsic() && wordOperationPlugin.handleInstanceOf(b, object, type, profile)) {
179 return true;
180 }
181 return false;
182 }
183 }