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 org.graalvm.compiler.core.common.type.Stamp;
  26 import org.graalvm.compiler.graph.NodeClass;
  27 import org.graalvm.compiler.nodeinfo.NodeInfo;
  28 import org.graalvm.compiler.nodes.ValueNode;
  29 import org.graalvm.compiler.nodes.spi.Lowerable;
  30 import org.graalvm.compiler.nodes.spi.LoweringTool;
  31 
  32 import jdk.vm.ci.meta.JavaKind;
  33 
  34 /**
  35  * The {@code AccessIndexedNode} class is the base class of instructions that read or write elements
  36  * of an array.
  37  */
  38 @NodeInfo
  39 public abstract class AccessIndexedNode extends AccessArrayNode implements Lowerable {
  40 
  41     public static final NodeClass<AccessIndexedNode> TYPE = NodeClass.create(AccessIndexedNode.class);
  42     @Input protected ValueNode index;
  43     protected final JavaKind elementKind;
  44 
  45     public ValueNode index() {
  46         return index;
  47     }
  48 
  49     /**
  50      * Create an new AccessIndexedNode.
  51      *
  52      * @param stamp the result kind of the access
  53      * @param array the instruction producing the array
  54      * @param index the instruction producing the index
  55      * @param elementKind the kind of the elements of the array
  56      */
  57     protected AccessIndexedNode(NodeClass<? extends AccessIndexedNode> c, Stamp stamp, ValueNode array, ValueNode index, JavaKind elementKind) {
  58         super(c, stamp, array);
  59         this.index = index;
  60         this.elementKind = elementKind;
  61     }
  62 
  63     /**
  64      * Gets the element type of the array.
  65      *
  66      * @return the element type
  67      */
  68     public JavaKind elementKind() {
  69         return elementKind;
  70     }
  71 
  72     @Override
  73     public void lower(LoweringTool tool) {
  74         tool.getLowerer().lower(this, tool);
  75     }
  76 }