/*

 * Copyright (c) 2011, 2015, 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 org.graalvm.compiler.nodes.virtual;

import java.nio.ByteOrder;

import org.graalvm.compiler.graph.NodeClass;

import org.graalvm.compiler.nodeinfo.NodeInfo;

import org.graalvm.compiler.nodeinfo.Verbosity;

import org.graalvm.compiler.nodes.ConstantNode;

import org.graalvm.compiler.nodes.FixedNode;

import org.graalvm.compiler.nodes.ValueNode;

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

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

import jdk.vm.ci.meta.JavaKind;

import jdk.vm.ci.meta.ResolvedJavaType;

@NodeInfo(nameTemplate = "VirtualArray({p#objectId}) {p#componentType/s}[{p#length}]")

public class VirtualArrayNode extends VirtualObjectNode implements ArrayLengthProvider {

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

    protected final ResolvedJavaType componentType;

    protected final int length;

    public VirtualArrayNode(ResolvedJavaType componentType, int length) {

        this(TYPE, componentType, length);

    }

    protected VirtualArrayNode(NodeClass<? extends VirtualObjectNode> c, ResolvedJavaType componentType, int length) {

        super(c, componentType.getArrayClass(), true);

        this.componentType = componentType;

        this.length = length;

    }

    @Override

    public ResolvedJavaType type() {

        return componentType.getArrayClass();

    }

    public ResolvedJavaType componentType() {

        return componentType;

    }

    @Override

    public int entryCount() {

        return length;

    }

    @Override

    public void generate(NodeLIRBuilderTool gen) {

        // nothing to do...

    }

    @Override

    public String toString(Verbosity verbosity) {

        if (verbosity == Verbosity.Name) {

            return super.toString(Verbosity.Name) + "(" + getObjectId() + ") " + componentType.getName() + "[" + length + "]";

        } else {

            return super.toString(verbosity);

        }

    }

    @Override

    public String entryName(int index) {

        return "[" + index + "]";

    }

    @Override

    }

        long offset;

        if (ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN && componentType.isPrimitive()) {

            // On big endian, we expect the value to be correctly aligned in memory

            int componentByteCount = componentType.getJavaKind().getByteCount();

            offset = constantOffset - (componentByteCount - Math.min(componentByteCount, 4 + expectedEntryKind.getByteCount()));

        } else {

            offset = constantOffset;

        }

        long index = offset - baseOffset;

        if (index % indexScale != 0) {

            return -1;

        }

        long elementIndex = index / indexScale;

        if (elementIndex < 0 || elementIndex >= length) {

            return -1;

        }

        return (int) elementIndex;

    }

    @Override

    public JavaKind entryKind(int index) {

        assert index >= 0 && index < length;

        return componentType.getJavaKind();

    }

    @Override

    public VirtualArrayNode duplicate() {

        return new VirtualArrayNode(componentType, length);

    }

    @Override

    public ValueNode getMaterializedRepresentation(FixedNode fixed, ValueNode[] entries, LockState locks) {

        return new AllocatedObjectNode(this);

    }

    @Override

    public ValueNode length() {

        return ConstantNode.forInt(length);

    }

}