/*

 * 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.memory;

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

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

import org.graalvm.compiler.graph.Node;

import org.graalvm.compiler.graph.NodeClass;

import org.graalvm.compiler.graph.spi.Canonicalizable;

import org.graalvm.compiler.graph.spi.CanonicalizerTool;

import org.graalvm.compiler.nodeinfo.NodeInfo;

import org.graalvm.compiler.nodes.NodeView;

import org.graalvm.compiler.nodes.ValueNode;

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

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

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

/**

 * Writes a given {@linkplain #value() value} a {@linkplain FixedAccessNode memory location}.

 */

@NodeInfo(nameTemplate = "Write#{p#location/s}")

public class WriteNode extends AbstractWriteNode implements LIRLowerableAccess, Canonicalizable {

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

        super(TYPE, address, location, value, barrierType);

    }

    protected WriteNode(NodeClass<? extends WriteNode> c, AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType) {

        super(c, address, location, value, barrierType);

    }

    @Override

    public void generate(NodeLIRBuilderTool gen) {

        LIRKind writeKind = gen.getLIRGeneratorTool().getLIRKind(value().stamp(NodeView.DEFAULT));

        gen.getLIRGeneratorTool().getArithmetic().emitStore(writeKind, gen.operand(address), gen.operand(value()), gen.state(this));

    }

    @Override

    public boolean canNullCheck() {

    }

    @Override

    public Stamp getAccessStamp() {

        return value().stamp(NodeView.DEFAULT);

    }

    @Override

    public Node canonical(CanonicalizerTool tool) {

        if (tool.canonicalizeReads() && hasExactlyOneUsage() && next() instanceof WriteNode) {

            WriteNode write = (WriteNode) next();

                write.setLastLocationAccess(getLastLocationAccess());

                return write;

            }

        }

        return this;

    }

}