MembarNode.java revision 13175:3df8ef613001 
1/*
2 * Copyright (c) 2011, 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.extended;
24
25import static org.graalvm.compiler.nodeinfo.InputType.Memory;
26import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2;
27import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_2;
28
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.FixedWithNextNode;
33import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;
34import org.graalvm.compiler.nodes.spi.LIRLowerable;
35import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
36import org.graalvm.word.LocationIdentity;
37
38/**
39 * Creates a memory barrier.
40 */
41@NodeInfo(nameTemplate = "Membar#{p#location/s}", allowedUsageTypes = Memory, cycles = CYCLES_2, size = SIZE_2)
42public final class MembarNode extends FixedWithNextNode implements LIRLowerable, MemoryCheckpoint.Single {
43
44    public static final NodeClass<MembarNode> TYPE = NodeClass.create(MembarNode.class);
45    protected final int barriers;
46    protected final LocationIdentity location;
47
48    public MembarNode(int barriers) {
49        this(barriers, LocationIdentity.any());
50    }
51
52    public MembarNode(int barriers, LocationIdentity location) {
53        super(TYPE, StampFactory.forVoid());
54        this.barriers = barriers;
55        this.location = location;
56    }
57
58    @Override
59    public LocationIdentity getLocationIdentity() {
60        return location;
61    }
62
63    @Override
64    public void generate(NodeLIRBuilderTool generator) {
65        generator.getLIRGeneratorTool().emitMembar(barriers);
66    }
67
68    @NodeIntrinsic
69    public static native void memoryBarrier(@ConstantNodeParameter int barriers);
70
71    @NodeIntrinsic
72    public static native void memoryBarrier(@ConstantNodeParameter int barriers, @ConstantNodeParameter LocationIdentity location);
73}
74