1 /*
   2  * Copyright (c) 2018, 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 
  24 
  25 package org.graalvm.compiler.nodes.memory.address;
  26 
  27 import org.graalvm.compiler.graph.NodeClass;
  28 import org.graalvm.compiler.nodeinfo.InputType;
  29 import org.graalvm.compiler.nodeinfo.NodeInfo;
  30 import org.graalvm.compiler.nodes.ValueNode;
  31 import org.graalvm.compiler.nodes.spi.Lowerable;
  32 import org.graalvm.compiler.nodes.spi.LoweringTool;
  33 
  34 import jdk.vm.ci.meta.JavaKind;
  35 
  36 /**
  37  * Represents an address that points to an element of a Java array.
  38  */
  39 @NodeInfo(allowedUsageTypes = InputType.Association)
  40 public class IndexAddressNode extends AddressNode implements Lowerable {
  41     public static final NodeClass<IndexAddressNode> TYPE = NodeClass.create(IndexAddressNode.class);
  42 
  43     @Input ValueNode array;
  44     @Input ValueNode index;
  45 
  46     private final JavaKind elementKind;
  47 
  48     public IndexAddressNode(ValueNode array, ValueNode index, JavaKind elementKind) {
  49         super(TYPE);
  50         this.array = array;
  51         this.index = index;
  52         this.elementKind = elementKind;
  53     }
  54 
  55     @Override
  56     public ValueNode getBase() {
  57         return array;
  58     }
  59 
  60     public ValueNode getArray() {
  61         return array;
  62     }
  63 
  64     @Override
  65     public ValueNode getIndex() {
  66         return index;
  67     }
  68 
  69     @Override
  70     public long getMaxConstantDisplacement() {
  71         return Long.MAX_VALUE;
  72     }
  73 
  74     public JavaKind getElementKind() {
  75         return elementKind;
  76     }
  77 
  78     @Override
  79     public void lower(LoweringTool tool) {
  80         tool.getLowerer().lower(this, tool);
  81     }
  82 }