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 
RegisterValue(ValueKind<?> kind, Register register)35     protected RegisterValue(ValueKind<?> kind, Register register) {
36         super(kind);
37         this.reg = register;
38     }
39 
40     @Override
toString()41     public String toString() {
42         return getRegister().name + getKindSuffix();
43     }
44 
45     /**
46      * @return the register that contains the value
47      */
getRegister()48     public Register getRegister() {
49         return reg;
50     }
51 
52     @Override
hashCode()53     public int hashCode() {
54         return 29 * super.hashCode() + reg.hashCode();
55     }
56 
57     @Override
equals(Object obj)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 }
66