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 * 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

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package org.graalvm.compiler.nodes.extended;

import static org.graalvm.compiler.nodeinfo.InputType.Memory;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2;

import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_2;

import org.graalvm.compiler.core.common.type.StampFactory;

import org.graalvm.compiler.graph.NodeClass;

import org.graalvm.compiler.nodeinfo.NodeInfo;

import org.graalvm.compiler.nodes.FixedWithNextNode;

import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;

import org.graalvm.compiler.nodes.spi.LIRLowerable;

import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;

import jdk.internal.vm.compiler.word.LocationIdentity;

/**

 * Creates a memory barrier.

 */

@NodeInfo(nameTemplate = "Membar#{p#location/s}", allowedUsageTypes = Memory, cycles = CYCLES_2, size = SIZE_2)

public final class MembarNode extends FixedWithNextNode implements LIRLowerable, MemoryCheckpoint.Single {

    public static final NodeClass<MembarNode> TYPE = NodeClass.create(MembarNode.class);

    protected final int barriers;

    protected final LocationIdentity location;

    public MembarNode(int barriers) {

        this(barriers, LocationIdentity.any());

    }

    public MembarNode(int barriers, LocationIdentity location) {

        super(TYPE, StampFactory.forVoid());

        this.barriers = barriers;

        this.location = location;

    }

    @Override

        return location;

    }

    @Override

    public void generate(NodeLIRBuilderTool generator) {

        generator.getLIRGeneratorTool().emitMembar(barriers);

    }

    @NodeIntrinsic

    public static native void memoryBarrier(@ConstantNodeParameter int barriers);

    @NodeIntrinsic

    public static native void memoryBarrier(@ConstantNodeParameter int barriers, @ConstantNodeParameter LocationIdentity location);

}