Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/HotSpotNodeClassSubstitutions.java @ 15106:6876a4599b7e
create NodeClass for each Node subclass during class initialization of the latter
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Tue, 15 Apr 2014 13:34:29 +0200 |
parents | 5e6f29f287d6 |
children | d90e5c22ba55 |
line wrap: on
line source
/* * Copyright (c) 2011, 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.hotspot.replacements; import static com.oracle.graal.phases.GraalOptions.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.api.replacements.*; import com.oracle.graal.graph.*; import com.oracle.graal.hotspot.meta.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.replacements.nodes.*; /** * Substitutions for improving the performance of {@link NodeClass#get}. */ @ClassSubstitution(NodeClass.class) public class HotSpotNodeClassSubstitutions { /** * A macro node for calls to {@link NodeClass#get(Class)}. It can use the compiler's knowledge * about node classes to replace itself with a constant value for a constant {@link Class} * parameter. */ public static class NodeClassGetNode extends PureFunctionMacroNode { public NodeClassGetNode(Invoke invoke) { super(invoke); } @Override protected Constant evaluate(Constant param, MetaAccessProvider metaAccess) { if (param.isNull() || ImmutableCode.getValue()) { return null; } return HotSpotObjectConstant.forObject(NodeClass.get((Class<?>) HotSpotObjectConstant.asObject(param))); } } /** * NOTE: A {@link MethodSubstitution} similar to * {@link HotSpotNodeSubstitutions#getNodeClass(Node)} is not possible here because there is no * guarantee that {@code c} is initialized (accessing a Class literal in Java is not a class * initialization barrier). */ @MacroSubstitution(isStatic = true, forced = true, macro = NodeClassGetNode.class) public static native NodeClass get(Class<?> c); }