| /* |
| * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.hotspot.meta; |
| |
| import static org.graalvm.compiler.core.common.GraalOptions.ImmutableCode; |
| import static org.graalvm.compiler.hotspot.meta.HotSpotGraalConstantFieldProvider.FieldReadEnabledInImmutableCode; |
| |
| import org.graalvm.compiler.core.common.type.StampPair; |
| import org.graalvm.compiler.nodes.ConstantNode; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext; |
| import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderTool; |
| import org.graalvm.compiler.nodes.graphbuilderconf.InlineInvokePlugin; |
| import org.graalvm.compiler.nodes.graphbuilderconf.NodePlugin; |
| import org.graalvm.compiler.nodes.graphbuilderconf.TypePlugin; |
| import org.graalvm.compiler.nodes.util.ConstantFoldUtil; |
| import org.graalvm.compiler.replacements.WordOperationPlugin; |
| import org.graalvm.compiler.word.Word; |
| |
| import jdk.vm.ci.meta.JavaConstant; |
| import jdk.vm.ci.meta.JavaKind; |
| import jdk.vm.ci.meta.JavaType; |
| import jdk.vm.ci.meta.JavaTypeProfile; |
| import jdk.vm.ci.meta.ResolvedJavaField; |
| import jdk.vm.ci.meta.ResolvedJavaMethod; |
| import jdk.vm.ci.meta.ResolvedJavaType; |
| |
| /** |
| * This plugin handles the HotSpot-specific customizations of bytecode parsing: |
| * <p> |
| * {@link Word}-type rewriting for {@link GraphBuilderContext#parsingIntrinsic intrinsic} functions |
| * (snippets and method substitutions), by forwarding to the {@link WordOperationPlugin}. Note that |
| * we forward the {@link NodePlugin} and {@link TypePlugin} methods, but not the |
| * {@link InlineInvokePlugin} methods implemented by {@link WordOperationPlugin}. The latter is not |
| * necessary because HotSpot only uses the {@link Word} type in methods that are force-inlined, |
| * i.e., there are never non-inlined invokes that involve the {@link Word} type. |
| * <p> |
| * Constant folding of field loads. |
| */ |
| public final class HotSpotNodePlugin implements NodePlugin, TypePlugin { |
| protected final WordOperationPlugin wordOperationPlugin; |
| |
| public HotSpotNodePlugin(WordOperationPlugin wordOperationPlugin) { |
| this.wordOperationPlugin = wordOperationPlugin; |
| } |
| |
| @Override |
| public boolean canChangeStackKind(GraphBuilderContext b) { |
| if (b.parsingIntrinsic()) { |
| return wordOperationPlugin.canChangeStackKind(b); |
| } |
| return false; |
| } |
| |
| @Override |
| public StampPair interceptType(GraphBuilderTool b, JavaType declaredType, boolean nonNull) { |
| if (b.parsingIntrinsic()) { |
| return wordOperationPlugin.interceptType(b, declaredType, nonNull); |
| } |
| return null; |
| } |
| |
| @Override |
| public boolean handleInvoke(GraphBuilderContext b, ResolvedJavaMethod method, ValueNode[] args) { |
| if (b.parsingIntrinsic() && wordOperationPlugin.handleInvoke(b, method, args)) { |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean handleLoadField(GraphBuilderContext b, ValueNode object, ResolvedJavaField field) { |
| if (!ImmutableCode.getValue() || b.parsingIntrinsic()) { |
| if (object.isConstant()) { |
| JavaConstant asJavaConstant = object.asJavaConstant(); |
| if (tryReadField(b, field, asJavaConstant)) { |
| return true; |
| } |
| } |
| } |
| if (b.parsingIntrinsic() && wordOperationPlugin.handleLoadField(b, object, field)) { |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean handleLoadStaticField(GraphBuilderContext b, ResolvedJavaField field) { |
| if (!ImmutableCode.getValue() || b.parsingIntrinsic()) { |
| if (tryReadField(b, field, null)) { |
| return true; |
| } |
| } |
| if (b.parsingIntrinsic() && wordOperationPlugin.handleLoadStaticField(b, field)) { |
| return true; |
| } |
| return false; |
| } |
| |
| private static boolean tryReadField(GraphBuilderContext b, ResolvedJavaField field, JavaConstant object) { |
| // FieldReadEnabledInImmutableCode is non null only if assertions are enabled |
| if (FieldReadEnabledInImmutableCode != null && ImmutableCode.getValue()) { |
| FieldReadEnabledInImmutableCode.set(Boolean.TRUE); |
| try { |
| return tryConstantFold(b, field, object); |
| } finally { |
| FieldReadEnabledInImmutableCode.set(null); |
| } |
| } else { |
| return tryConstantFold(b, field, object); |
| } |
| } |
| |
| private static boolean tryConstantFold(GraphBuilderContext b, ResolvedJavaField field, JavaConstant object) { |
| ConstantNode result = ConstantFoldUtil.tryConstantFold(b.getConstantFieldProvider(), b.getConstantReflection(), b.getMetaAccess(), field, object); |
| if (result != null) { |
| result = b.getGraph().unique(result); |
| b.push(field.getJavaKind(), result); |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean handleStoreField(GraphBuilderContext b, ValueNode object, ResolvedJavaField field, ValueNode value) { |
| if (b.parsingIntrinsic() && wordOperationPlugin.handleStoreField(b, object, field, value)) { |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean handleStoreStaticField(GraphBuilderContext b, ResolvedJavaField field, ValueNode value) { |
| if (b.parsingIntrinsic() && wordOperationPlugin.handleStoreStaticField(b, field, value)) { |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean handleLoadIndexed(GraphBuilderContext b, ValueNode array, ValueNode index, JavaKind elementKind) { |
| if (b.parsingIntrinsic() && wordOperationPlugin.handleLoadIndexed(b, array, index, elementKind)) { |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean handleStoreIndexed(GraphBuilderContext b, ValueNode array, ValueNode index, JavaKind elementKind, ValueNode value) { |
| if (b.parsingIntrinsic() && wordOperationPlugin.handleStoreIndexed(b, array, index, elementKind, value)) { |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean handleCheckCast(GraphBuilderContext b, ValueNode object, ResolvedJavaType type, JavaTypeProfile profile) { |
| if (b.parsingIntrinsic() && wordOperationPlugin.handleCheckCast(b, object, type, profile)) { |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean handleInstanceOf(GraphBuilderContext b, ValueNode object, ResolvedJavaType type, JavaTypeProfile profile) { |
| if (b.parsingIntrinsic() && wordOperationPlugin.handleInstanceOf(b, object, type, profile)) { |
| return true; |
| } |
| return false; |
| } |
| } |
