Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/LoadMethodNode.java @ 16919:0fe4732e5181
made use of generated Node classes predicated on value of graal.useGeneratedNodes system property (default is false)
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 25 Aug 2014 13:45:12 +0200 |
parents | f90dcdbbb75e |
children | ffb974bef674 |
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/* * Copyright (c) 2013, 2014, 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 com.oracle.graal.nodes.extended; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; /** * Loads a method from the virtual method table of a given hub. */ @NodeInfo public class LoadMethodNode extends FixedWithNextNode implements Lowerable, Canonicalizable { @Input ValueNode hub; private final ResolvedJavaMethod method; private final ResolvedJavaType receiverType; public ValueNode getHub() { return hub; } public static LoadMethodNode create(ResolvedJavaMethod method, ResolvedJavaType receiverType, ValueNode hub, Kind kind) { return USE_GENERATED_NODES ? new LoadMethodNodeGen(method, receiverType, hub, kind) : new LoadMethodNode(method, receiverType, hub, kind); } LoadMethodNode(ResolvedJavaMethod method, ResolvedJavaType receiverType, ValueNode hub, Kind kind) { super(kind == Kind.Object ? StampFactory.objectNonNull() : StampFactory.forKind(kind)); this.receiverType = receiverType; this.hub = hub; this.method = method; assert !method.isAbstract() : "Cannot load abstract method from a hub"; assert !method.isStatic() : "Cannot load a static method from a hub"; assert method.isInVirtualMethodTable(receiverType); } @Override public void lower(LoweringTool tool) { tool.getLowerer().lower(this, tool); } @Override public Node canonical(CanonicalizerTool tool) { if (hub instanceof LoadHubNode) { ValueNode object = ((LoadHubNode) hub).getValue(); ResolvedJavaType type = StampTool.typeOrNull(object); if (StampTool.isExactType(object)) { return resolveExactMethod(tool, type); } if (type != null && tool.assumptions().useOptimisticAssumptions()) { ResolvedJavaMethod resolvedMethod = type.findUniqueConcreteMethod(method); if (resolvedMethod != null && !type.isInterface() && method.getDeclaringClass().isAssignableFrom(type)) { tool.assumptions().recordConcreteMethod(method, type, resolvedMethod); return ConstantNode.forConstant(resolvedMethod.getEncoding(), tool.getMetaAccess()); } } } if (hub.isConstant()) { return resolveExactMethod(tool, tool.getConstantReflection().asJavaType(hub.asConstant())); } return this; } /** * Find the method which would be loaded. * * @param tool * @param type the exact type of object being loaded from * @return the method which would be invoked for {@code type} or null if it doesn't implement * the method */ private Node resolveExactMethod(CanonicalizerTool tool, ResolvedJavaType type) { ResolvedJavaMethod newMethod = type.resolveMethod(method, type); if (newMethod == null) { /* * This really represent a misuse of LoadMethod since we're loading from a class which * isn't known to implement the original method but for now at least fold it away. */ return ConstantNode.forConstant(Constant.NULL_OBJECT, null); } else { return ConstantNode.forConstant(newMethod.getEncoding(), tool.getMetaAccess()); } } public ResolvedJavaMethod getMethod() { return method; } public ResolvedJavaType getReceiverType() { return receiverType; } }