hotspot/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/java/NewMultiArrayNode.java

/*
 * Copyright (c) 2009, 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
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package org.graalvm.compiler.nodes.java;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_50;
import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_50;

import org.graalvm.compiler.core.common.type.StampFactory;
import org.graalvm.compiler.core.common.type.TypeReference;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.graph.NodeInputList;
import org.graalvm.compiler.graph.NodeList;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodes.DeoptimizingFixedWithNextNode;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.spi.ArrayLengthProvider;
import org.graalvm.compiler.nodes.spi.Lowerable;
import org.graalvm.compiler.nodes.spi.LoweringTool;

import jdk.vm.ci.meta.ResolvedJavaType;

/**
 * The {@code NewMultiArrayNode} represents an allocation of a multi-dimensional object array.
 */
@NodeInfo(cycles = CYCLES_50, size = SIZE_50)
public class NewMultiArrayNode extends DeoptimizingFixedWithNextNode implements Lowerable, ArrayLengthProvider {

    public static final NodeClass<NewMultiArrayNode> TYPE = NodeClass.create(NewMultiArrayNode.class);
    @Input protected NodeInputList<ValueNode> dimensions;
    protected final ResolvedJavaType type;

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

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

    public NodeList<ValueNode> dimensions() {
        return dimensions;
    }

    public NewMultiArrayNode(ResolvedJavaType type, ValueNode[] dimensions) {
        this(TYPE, type, dimensions);
    }

    protected NewMultiArrayNode(NodeClass<? extends NewMultiArrayNode> c, ResolvedJavaType type, ValueNode[] dimensions) {
        super(c, StampFactory.objectNonNull(TypeReference.createExactTrusted(type)));
        this.type = type;
        this.dimensions = new NodeInputList<>(this, dimensions);
        assert dimensions.length > 0 && type.isArray();
    }

    @Override
    public void lower(LoweringTool tool) {
        tool.getLowerer().lower(this, tool);
    }

    public ResolvedJavaType type() {
        return type;
    }

    @Override
    public boolean canDeoptimize() {
        return true;
    }

    @Override
    public ValueNode length() {
        return dimension(0);
    }
}