1 /*
   2  * Copyright (c) 2009, 2016, 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 jdk.vm.ci.code;
  24 
  25 import jdk.vm.ci.meta.AllocatableValue;
  26 import jdk.vm.ci.meta.ValueKind;
  27 
  28 /**
  29  * Denotes a register that stores a value of a fixed kind.
  30  */
  31 public final class RegisterValue extends AllocatableValue {
  32 
  33     private final Register reg;
  34 
  35     protected RegisterValue(ValueKind<?> kind, Register register) {
  36         super(kind);
  37         this.reg = register;
  38     }
  39 
  40     @Override
  41     public String toString() {
  42         return getRegister().name + getKindSuffix();
  43     }
  44 
  45     /**
  46      * @return the register that contains the value
  47      */
  48     public Register getRegister() {
  49         return reg;
  50     }
  51 
  52     @Override
  53     public int hashCode() {
  54         return 29 * super.hashCode() + reg.hashCode();
  55     }
  56 
  57     @Override
  58     public boolean equals(Object obj) {
  59         if (obj instanceof RegisterValue) {
  60             RegisterValue other = (RegisterValue) obj;
  61             return super.equals(obj) && reg.equals(other.reg);
  62         }
  63         return false;
  64     }
  65 }