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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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.
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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.PointerBase;

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

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

    @Input protected ValueNode value;

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

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

    @NodeIntrinsic
    public static native void writeCurrentVMHeapBase(PointerBase value);
}
