Mercurial > hg > truffle
view graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/nodes/PureFunctionMacroNode.java @ 19526:8fc336a04d77
Create TYPE fields for LIRInstruction and CompositeValue. Renaming NodeClass#get to NodeClass#create.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 20 Feb 2015 22:22:55 +0100 |
parents | 880717e44675 |
children | 8470e81631f8 |
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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.replacements.nodes; import com.oracle.graal.api.meta.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; /** * This node class can be used to create {@link MacroNode}s for simple pure functions like * {@link System#identityHashCode(Object)}. */ @NodeInfo public abstract class PureFunctionMacroNode extends MacroStateSplitNode implements Canonicalizable { public static final NodeClass<PureFunctionMacroNode> TYPE = NodeClass.create(PureFunctionMacroNode.class); protected PureFunctionMacroNode(NodeClass<? extends PureFunctionMacroNode> c, Invoke invoke) { super(c, invoke); } /** * This method should return either a constant that represents the result of the function, or * null if no such result could be determined. */ protected abstract JavaConstant evaluate(JavaConstant param, MetaAccessProvider metaAccess); @Override public Node canonical(CanonicalizerTool tool) { if (hasNoUsages()) { return null; } else { ValueNode param = arguments.get(0); if (param.isConstant()) { JavaConstant constant = evaluate(param.asJavaConstant(), tool.getMetaAccess()); if (constant != null) { return ConstantNode.forConstant(constant, tool.getMetaAccess()); } } } return this; } }