1 /*
   2  * Copyright (c) 2009, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.graalvm.compiler.nodes.java;
  24 
  25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_50;
  26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_50;
  27 
  28 import org.graalvm.compiler.core.common.type.StampFactory;
  29 import org.graalvm.compiler.core.common.type.TypeReference;
  30 import org.graalvm.compiler.graph.NodeClass;
  31 import org.graalvm.compiler.graph.NodeInputList;
  32 import org.graalvm.compiler.graph.NodeList;
  33 import org.graalvm.compiler.nodeinfo.NodeInfo;
  34 import org.graalvm.compiler.nodes.DeoptimizingFixedWithNextNode;
  35 import org.graalvm.compiler.nodes.ValueNode;
  36 import org.graalvm.compiler.nodes.spi.ArrayLengthProvider;
  37 import org.graalvm.compiler.nodes.spi.Lowerable;
  38 import org.graalvm.compiler.nodes.spi.LoweringTool;
  39 
  40 import jdk.vm.ci.meta.ResolvedJavaType;
  41 
  42 /**
  43  * The {@code NewMultiArrayNode} represents an allocation of a multi-dimensional object array.
  44  */
  45 @NodeInfo(cycles = CYCLES_50, size = SIZE_50)
  46 public class NewMultiArrayNode extends DeoptimizingFixedWithNextNode implements Lowerable, ArrayLengthProvider {
  47 
  48     public static final NodeClass<NewMultiArrayNode> TYPE = NodeClass.create(NewMultiArrayNode.class);
  49     @Input protected NodeInputList<ValueNode> dimensions;
  50     protected final ResolvedJavaType type;
  51 
  52     public ValueNode dimension(int index) {
  53         return dimensions.get(index);
  54     }
  55 
  56     public int dimensionCount() {
  57         return dimensions.size();
  58     }
  59 
  60     public NodeList<ValueNode> dimensions() {
  61         return dimensions;
  62     }
  63 
  64     public NewMultiArrayNode(ResolvedJavaType type, ValueNode[] dimensions) {
  65         this(TYPE, type, dimensions);
  66     }
  67 
  68     protected NewMultiArrayNode(NodeClass<? extends NewMultiArrayNode> c, ResolvedJavaType type, ValueNode[] dimensions) {
  69         super(c, StampFactory.objectNonNull(TypeReference.createExactTrusted(type)));
  70         this.type = type;
  71         this.dimensions = new NodeInputList<>(this, dimensions);
  72         assert dimensions.length > 0 && type.isArray();
  73     }
  74 
  75     @Override
  76     public void lower(LoweringTool tool) {
  77         tool.getLowerer().lower(this, tool);
  78     }
  79 
  80     public ResolvedJavaType type() {
  81         return type;
  82     }
  83 
  84     @Override
  85     public boolean canDeoptimize() {
  86         return true;
  87     }
  88 
  89     @Override
  90     public ValueNode length() {
  91         return dimension(0);
  92     }
  93 }