AtomicReadAndWriteNode.java revision 13017:134219a5b0ec 
1/*
2 * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package org.graalvm.compiler.nodes.java;
24
25import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_8;
26import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_2;
27
28import org.graalvm.compiler.core.common.LocationIdentity;
29import org.graalvm.compiler.core.common.type.StampFactory;
30import org.graalvm.compiler.graph.NodeClass;
31import org.graalvm.compiler.nodeinfo.NodeInfo;
32import org.graalvm.compiler.nodes.ValueNode;
33import org.graalvm.compiler.nodes.memory.AbstractMemoryCheckpoint;
34import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;
35import org.graalvm.compiler.nodes.spi.Lowerable;
36import org.graalvm.compiler.nodes.spi.LoweringTool;
37
38import jdk.vm.ci.meta.JavaKind;
39import sun.misc.Unsafe;
40
41/**
42 * Represents an atomic read-and-write operation like {@link Unsafe#getAndSetInt(Object, long, int)}
43 * .
44 */
45@NodeInfo(cycles = CYCLES_8, size = SIZE_2)
46public final class AtomicReadAndWriteNode extends AbstractMemoryCheckpoint implements Lowerable, MemoryCheckpoint.Single {
47
48    public static final NodeClass<AtomicReadAndWriteNode> TYPE = NodeClass.create(AtomicReadAndWriteNode.class);
49    @Input ValueNode object;
50    @Input ValueNode offset;
51    @Input ValueNode newValue;
52
53    protected final JavaKind valueKind;
54    protected final LocationIdentity locationIdentity;
55
56    public AtomicReadAndWriteNode(ValueNode object, ValueNode offset, ValueNode newValue, JavaKind valueKind, LocationIdentity locationIdentity) {
57        super(TYPE, StampFactory.forKind(newValue.getStackKind()));
58        this.object = object;
59        this.offset = offset;
60        this.newValue = newValue;
61        this.valueKind = valueKind;
62        this.locationIdentity = locationIdentity;
63    }
64
65    public ValueNode object() {
66        return object;
67    }
68
69    public ValueNode offset() {
70        return offset;
71    }
72
73    public ValueNode newValue() {
74        return newValue;
75    }
76
77    public JavaKind getValueKind() {
78        return valueKind;
79    }
80
81    @Override
82    public LocationIdentity getLocationIdentity() {
83        return locationIdentity;
84    }
85
86    @Override
87    public void lower(LoweringTool tool) {
88        tool.getLowerer().lower(this, tool);
89    }
90}
91