Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/LocationNode.java @ 9233:374ece5ff845
Make LocationNodes usable in Snippets.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Mon, 22 Apr 2013 18:57:35 +0200 |
parents | 9adb07d6f07f |
children | 8e7dc0023b04 |
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/* * Copyright (c) 2011, 2012, 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.graph.Node.ValueNumberable; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; /** * A location for a memory access in terms of the kind of value accessed and how to access it. All * locations have the form [base + location], where base is a node and location is defined by * subclasses of the {@link LocationNode}. */ public abstract class LocationNode extends FloatingNode implements LIRLowerable, ValueNumberable { private Kind valueKind; private Object locationIdentity; /** * Creates a new unique location identity for read and write operations. * * @param name the name of the new location identity, for debugging purposes * @return the new location identity */ public static Object createLocation(final String name) { return new Object() { @Override public String toString() { return name; } }; } /** * Denotes any location. A write to such a location kills all values in a memory map during an * analysis of memory accesses in a graph. A read from this location cannot be moved or * coalesced with other reads because its interaction with other reads is not known. */ public static final Object ANY_LOCATION = createLocation("ANY_LOCATION"); /** * Denotes the location of a value that is guaranteed to be final. */ public static final Object FINAL_LOCATION = createLocation("FINAL_LOCATION"); /** * Marker interface for locations in snippets. */ public interface Location { } public static Object getArrayLocation(Kind elementKind) { return elementKind; } protected LocationNode(Object identity, Kind kind) { super(StampFactory.extension()); assert kind != Kind.Illegal && kind != Kind.Void; this.valueKind = kind; this.locationIdentity = identity; } public Kind getValueKind() { return valueKind; } public Object locationIdentity() { return locationIdentity; } protected abstract LocationNode addDisplacement(long displacement); @Override public void generate(LIRGeneratorTool generator) { // nothing to do... } public abstract Value generateLea(LIRGeneratorTool gen, Value base); public abstract Value generateLoad(LIRGeneratorTool gen, Value base, DeoptimizingNode deopting); public abstract void generateStore(LIRGeneratorTool gen, Value base, Value value, DeoptimizingNode deopting); }