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comparison graal/com.oracle.jvmci.code/src/com/oracle/jvmci/code/RegisterValue.java @ 21556:48c1ebd24120

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renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Wed, 27 May 2015 00:36:16 +0200
parents graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/RegisterValue.java@082417ac43e4
children
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21555:d12eaef9af72 21556:48c1ebd24120
1 /*
2 * Copyright (c) 2009, 2014, 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 com.oracle.jvmci.code;
24
25 import com.oracle.jvmci.meta.*;
26
27 /**
28 * Denotes a register that stores a value of a fixed kind. There is exactly one (canonical) instance
29 * of {@link RegisterValue} for each ({@link Register}, {@link Kind}) pair. Use
30 * {@link Register#asValue(LIRKind)} to retrieve the canonical {@link RegisterValue} instance for a
31 * given (register,kind) pair.
32 */
33 public final class RegisterValue extends AllocatableValue {
34
35 private final Register reg;
36
37 /**
38 * Should only be called from {@link Register#Register} to ensure canonicalization.
39 */
40 protected RegisterValue(LIRKind kind, Register register) {
41 super(kind);
42 this.reg = register;
43 }
44
45 @Override
46 public String toString() {
47 return getRegister().name + getKindSuffix();
48 }
49
50 /**
51 * @return the register that contains the value
52 */
53 public Register getRegister() {
54 return reg;
55 }
56
57 @Override
58 public int hashCode() {
59 return 29 * super.hashCode() + reg.hashCode();
60 }
61
62 @Override
63 public boolean equals(Object obj) {
64 if (obj instanceof RegisterValue) {
65 RegisterValue other = (RegisterValue) obj;
66 return super.equals(obj) && reg.equals(other.reg);
67 }
68 return false;
69 }
70 }