001/*
002 * Copyright (c) 2009, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.nodes.java;
024
025import jdk.internal.jvmci.meta.*;
026
027import com.oracle.graal.compiler.common.type.*;
028import com.oracle.graal.graph.*;
029import com.oracle.graal.nodeinfo.*;
030import com.oracle.graal.nodes.*;
031import com.oracle.graal.nodes.spi.*;
032
033/**
034 * The {@code NewMultiArrayNode} represents an allocation of a multi-dimensional object array.
035 */
036@NodeInfo
037public class NewMultiArrayNode extends DeoptimizingFixedWithNextNode implements Lowerable, ArrayLengthProvider {
038
039    public static final NodeClass<NewMultiArrayNode> TYPE = NodeClass.create(NewMultiArrayNode.class);
040    @Input protected NodeInputList<ValueNode> dimensions;
041    protected final ResolvedJavaType type;
042
043    public ValueNode dimension(int index) {
044        return dimensions.get(index);
045    }
046
047    public int dimensionCount() {
048        return dimensions.size();
049    }
050
051    public NodeList<ValueNode> dimensions() {
052        return dimensions;
053    }
054
055    public NewMultiArrayNode(ResolvedJavaType type, ValueNode[] dimensions) {
056        this(TYPE, type, dimensions);
057    }
058
059    protected NewMultiArrayNode(NodeClass<? extends NewMultiArrayNode> c, ResolvedJavaType type, ValueNode[] dimensions) {
060        super(c, StampFactory.exactNonNull(type));
061        this.type = type;
062        this.dimensions = new NodeInputList<>(this, dimensions);
063        assert dimensions.length > 0 && type.isArray();
064    }
065
066    @Override
067    public void lower(LoweringTool tool) {
068        tool.getLowerer().lower(this, tool);
069    }
070
071    public ResolvedJavaType type() {
072        return type;
073    }
074
075    @Override
076    public boolean canDeoptimize() {
077        return true;
078    }
079
080    public ValueNode length() {
081        return dimension(0);
082    }
083}