/*

 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

 * Copyright (c) 2019, Red Hat Inc. All rights reserved.

 * 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

 * or visit www.oracle.com if you need additional information or have any

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 */

package org.graalvm.compiler.nodes.memory;

import org.graalvm.compiler.core.common.GraalOptions;

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

import org.graalvm.compiler.graph.NodeClass;

import org.graalvm.compiler.nodeinfo.NodeInfo;

import org.graalvm.compiler.nodes.memory.address.AddressNode;

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

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_1;

@NodeInfo(nameTemplate = "Read#{p#location/s}", allowedUsageTypes = Memory, cycles = CYCLES_2, size = SIZE_1)

public class VolatileReadNode extends ReadNode implements MemoryCheckpoint.Single {

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

    public VolatileReadNode(AddressNode address, LocationIdentity location, Stamp stamp, BarrierType barrierType) {

        super(TYPE, address, location, stamp, null, barrierType, false, null);

        assert GraalOptions.LateMembars.getValue(address.getOptions());

    }

    @SuppressWarnings("try")

    @Override

    public FloatingAccessNode asFloatingNode() {

        throw new RuntimeException();

    }

    @Override

    public boolean canFloat() {

        return false;

    }

    @Override

    public LocationIdentity getKilledLocationIdentity() {

        return LocationIdentity.any();

    }

    @Override

    public boolean canNullCheck() {

        return false;

    }

}