Mercurial > hg > graal-jvmci-8
comparison graal/com.oracle.max.cri/src/com/sun/cri/ci/CiRegisterValue.java @ 3733:e233f5660da4
Added Java files from Maxine project.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 19:59:18 +0100 |
parents | |
children | bc8527f3071c |
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3732:3e2e8b8abdaf | 3733:e233f5660da4 |
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1 /* | |
2 * Copyright (c) 2009, 2011, 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.sun.cri.ci; | |
24 | |
25 /** | |
26 * Denotes a register that stores a value of a fixed kind. There is exactly one (canonical) instance of {@code | |
27 * CiRegisterValue} for each ({@link CiRegister}, {@link CiKind}) pair. Use {@link CiRegister#asValue(CiKind)} to | |
28 * retrieve the canonical {@link CiRegisterValue} instance for a given (register,kind) pair. | |
29 */ | |
30 public final class CiRegisterValue extends CiValue { | |
31 | |
32 /** | |
33 * The register. | |
34 */ | |
35 public final CiRegister reg; | |
36 | |
37 /** | |
38 * Should only be called from {@link CiRegister#CiRegister} to ensure canonicalization. | |
39 */ | |
40 CiRegisterValue(CiKind kind, CiRegister register) { | |
41 super(kind); | |
42 this.reg = register; | |
43 } | |
44 | |
45 @Override | |
46 public int hashCode() { | |
47 return kind.ordinal() ^ reg.number; | |
48 } | |
49 | |
50 @Override | |
51 public boolean equals(Object o) { | |
52 return o == this; | |
53 } | |
54 | |
55 @Override | |
56 public boolean equalsIgnoringKind(CiValue other) { | |
57 if (other instanceof CiRegisterValue) { | |
58 return ((CiRegisterValue) other).reg == reg; | |
59 } | |
60 return false; | |
61 } | |
62 | |
63 @Override | |
64 public String name() { | |
65 return reg.name; | |
66 } | |
67 | |
68 @Override | |
69 public CiRegister asRegister() { | |
70 return reg; | |
71 } | |
72 } |