001/*
002 * Copyright (c) 2011, 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.extended;
024
025import jdk.internal.jvmci.meta.*;
026
027import com.oracle.graal.compiler.common.type.*;
028import com.oracle.graal.graph.*;
029import com.oracle.graal.nodeinfo.*;
030import com.oracle.graal.nodes.*;
031import com.oracle.graal.nodes.memory.*;
032import com.oracle.graal.nodes.spi.*;
033
034/**
035 * Creates a memory barrier.
036 */
037@NodeInfo(allowedUsageTypes = {InputType.Memory})
038public final class MembarNode extends FixedWithNextNode implements LIRLowerable, MemoryCheckpoint.Single {
039
040    public static final NodeClass<MembarNode> TYPE = NodeClass.create(MembarNode.class);
041    protected final int barriers;
042    protected final LocationIdentity location;
043
044    public MembarNode(int barriers) {
045        this(barriers, LocationIdentity.any());
046    }
047
048    public MembarNode(int barriers, LocationIdentity location) {
049        super(TYPE, StampFactory.forVoid());
050        this.barriers = barriers;
051        this.location = location;
052    }
053
054    @Override
055    public LocationIdentity getLocationIdentity() {
056        return location;
057    }
058
059    @Override
060    public void generate(NodeLIRBuilderTool generator) {
061        generator.getLIRGeneratorTool().emitMembar(barriers);
062    }
063
064    @NodeIntrinsic
065    public static native void memoryBarrier(@ConstantNodeParameter int barriers);
066
067    @NodeIntrinsic
068    public static native void memoryBarrier(@ConstantNodeParameter int barriers, @ConstantNodeParameter LocationIdentity location);
069}