/*
 * Copyright (c) 2009, 2011, 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.nodes.java;

import com.oracle.graal.api.meta.*;
import com.oracle.graal.graph.*;
import com.oracle.graal.nodes.*;
import com.oracle.graal.nodes.calc.*;
import com.oracle.graal.nodes.spi.*;
import com.oracle.graal.nodes.spi.types.*;
import com.oracle.graal.nodes.type.*;

/**
 * The {@code NewMultiArrayNode} represents an allocation of a multi-dimensional object
 * array.
 */
public final class NewMultiArrayNode extends FixedWithNextNode implements LIRLowerable, TypeFeedbackProvider {

    @Input private final NodeInputList<ValueNode> dimensions;
    private final ResolvedJavaType type;

    public ValueNode dimension(int index) {
        return dimensions.get(index);
    }

    public int dimensionCount() {
        return dimensions.size();
    }

    /**
     * Constructs a new NewMultiArrayNode.
     * @param elementType the element type of the array
     * @param dimensions the node which produce the dimensions for this array
     * @param cpi the constant pool index for resolution
     * @param riConstantPool the constant pool for resolution
     */
    public NewMultiArrayNode(ResolvedJavaType type, ValueNode[] dimensions) {
        super(StampFactory.exactNonNull(type));
        this.type = type;
        this.dimensions = new NodeInputList<>(this, dimensions);
        assert dimensions.length > 0 && type.isArrayClass();
    }

    @Override
    public void generate(LIRGeneratorTool gen) {
        gen.visitNewMultiArray(this);
    }

    public ResolvedJavaType type() {
        return type;
    }

    @Override
    public void typeFeedback(TypeFeedbackTool tool) {
        for (ValueNode length : dimensions) {
            assert length.kind() == Kind.Int;
            tool.addScalar(length).constantBound(Condition.GE, Constant.INT_0);
        }
    }
}