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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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 com.oracle.svm.core.graal.nodes;

import org.graalvm.compiler.core.common.type.StampFactory;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.lir.gen.LIRGeneratorTool;
import org.graalvm.compiler.nodeinfo.NodeCycles;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodeinfo.NodeSize;
import org.graalvm.compiler.nodes.FixedWithNextNode;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.spi.LIRLowerable;
import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
import org.graalvm.word.WordBase;

import com.oracle.svm.core.FrameAccess;
import com.oracle.svm.core.ReservedRegisters;

@NodeInfo(cycles = NodeCycles.CYCLES_1, size = NodeSize.SIZE_1)
public class WriteStackPointerNode extends FixedWithNextNode implements LIRLowerable {
    public static final NodeClass<WriteStackPointerNode> TYPE = NodeClass.create(WriteStackPointerNode.class);

    @Input protected ValueNode value;

    protected WriteStackPointerNode(ValueNode value) {
        super(TYPE, StampFactory.forVoid());
        this.value = value;
    }

    public ValueNode getValue() {
        return value;
    }

    @Override
    public void generate(NodeLIRBuilderTool gen) {
        LIRGeneratorTool tool = gen.getLIRGeneratorTool();
        gen.getLIRGeneratorTool().emitWriteRegister(ReservedRegisters.singleton().getFrameRegister(), gen.operand(value), tool.getLIRKind(FrameAccess.getWordStamp()));
    }

    @NodeIntrinsic
    public static native void write(WordBase value);
}
