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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
 *
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package org.graalvm.compiler.nodes.debug;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_IGNORED;
import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_IGNORED;

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

/**
 * Compiler directives node that disables write sinking of all enclosing loops.
 */
@NodeInfo(cycles = CYCLES_IGNORED, size = SIZE_IGNORED, cyclesRationale = "Directives node", sizeRationale = "Directives node")
public final class NeverWriteSinkNode extends FixedWithNextNode implements LIRLowerable {

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

    private static class Unique {
    }

    protected Unique unique;

    public NeverWriteSinkNode() {
        super(TYPE, StampFactory.forVoid());
        this.unique = new Unique();
    }

    @Override
    public void generate(NodeLIRBuilderTool generator) {
        // do nothing
    }

}
