/*
 * Copyright (c) 2012, Oracle and/or its affiliates. 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
 * questions.
 */
package com.oracle.graal.hotspot.snippets;

import com.oracle.graal.nodes.*;
import com.oracle.graal.nodes.extended.*;
import com.oracle.graal.nodes.spi.*;
import com.oracle.graal.nodes.type.*;
import com.oracle.graal.snippets.*;

/**
 * A special purpose store node that differs from {@link UnsafeStoreNode} in that
 * it is not a {@link StateSplit} and does not include a write barrier.
 */
class DirectObjectStoreNode extends FixedWithNextNode implements Lowerable {
    @Input private ValueNode object;
    @Input private ValueNode value;
    @Input private ValueNode offset;
    private final int displacement;

    public DirectObjectStoreNode(ValueNode object, int displacement, ValueNode offset, ValueNode value) {
        super(StampFactory.forVoid());
        this.object = object;
        this.value = value;
        this.offset = offset;
        this.displacement = displacement;
    }

    @SuppressWarnings("unused")
    @NodeIntrinsic
    public static void storeObject(Object obj, @ConstantNodeParameter int displacement, long offset, Object value) {
        throw new UnsupportedOperationException();
    }

    @SuppressWarnings("unused")
    @NodeIntrinsic
    public static void storeLong(Object obj, @ConstantNodeParameter int displacement, long offset, long value) {
        throw new UnsupportedOperationException();
    }

    @SuppressWarnings("unused")
    @NodeIntrinsic
    public static void storeWord(Object obj, @ConstantNodeParameter int displacement, long offset, Word value) {
        throw new UnsupportedOperationException();
    }

    @SuppressWarnings("unused")
    @NodeIntrinsic
    public static void storeInt(Object obj, @ConstantNodeParameter int displacement, long offset, int value) {
        throw new UnsupportedOperationException();
    }

    @Override
    public void lower(LoweringTool tool) {
        StructuredGraph graph = (StructuredGraph) this.graph();
        IndexedLocationNode location = IndexedLocationNode.create(LocationNode.ANY_LOCATION, value.kind(), displacement, offset, graph, false);
        WriteNode write = graph.add(new WriteNode(object, value, location));
        graph.replaceFixedWithFixed(this, write);
    }
}