001/*
002 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.nodes.java;
024
025import jdk.internal.jvmci.meta.*;
026import sun.misc.*;
027
028import com.oracle.graal.compiler.common.type.*;
029import com.oracle.graal.graph.*;
030import com.oracle.graal.nodeinfo.*;
031import com.oracle.graal.nodes.*;
032import com.oracle.graal.nodes.memory.*;
033import com.oracle.graal.nodes.spi.*;
034
035/**
036 * Represents an atomic read-and-write operation like {@link Unsafe#getAndSetInt(Object, long, int)}
037 * .
038 */
039@NodeInfo
040public final class AtomicReadAndWriteNode extends AbstractMemoryCheckpoint implements Lowerable, MemoryCheckpoint.Single {
041
042    public static final NodeClass<AtomicReadAndWriteNode> TYPE = NodeClass.create(AtomicReadAndWriteNode.class);
043    @Input ValueNode object;
044    @Input ValueNode offset;
045    @Input ValueNode newValue;
046
047    protected final Kind valueKind;
048    protected final LocationIdentity locationIdentity;
049
050    public AtomicReadAndWriteNode(ValueNode object, ValueNode offset, ValueNode newValue, Kind valueKind, LocationIdentity locationIdentity) {
051        super(TYPE, StampFactory.forKind(newValue.getKind()));
052        this.object = object;
053        this.offset = offset;
054        this.newValue = newValue;
055        this.valueKind = valueKind;
056        this.locationIdentity = locationIdentity;
057    }
058
059    public ValueNode object() {
060        return object;
061    }
062
063    public ValueNode offset() {
064        return offset;
065    }
066
067    public ValueNode newValue() {
068        return newValue;
069    }
070
071    public Kind getValueKind() {
072        return valueKind;
073    }
074
075    public LocationIdentity getLocationIdentity() {
076        return locationIdentity;
077    }
078
079    public void lower(LoweringTool tool) {
080        tool.getLowerer().lower(this, tool);
081    }
082}