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comparison jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/ValueKind.java @ 23396:9ed5b586018b

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Replace LIRKind with abstract base class (JDK-8156942).
author Roland Schatz <roland.schatz@oracle.com>
date Fri, 13 May 2016 14:33:19 +0200
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children a7b12c1ab514
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23395:19432ed40848 23396:9ed5b586018b
1 /*
2 * Copyright (c) 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.meta;
24
25 /**
26 * Represents the type of {@link Value values}. This class can be extended by compilers to track
27 * additional information about values.
28 */
29 public abstract class ValueKind<K extends ValueKind<K>> {
30
31 private enum IllegalKind implements PlatformKind {
32 ILLEGAL;
33
34 private final EnumKey<IllegalKind> key = new EnumKey<>(this);
35
36 public Key getKey() {
37 return key;
38 }
39
40 public int getSizeInBytes() {
41 return 0;
42 }
43
44 public int getVectorLength() {
45 return 0;
46 }
47
48 public char getTypeChar() {
49 return '-';
50 }
51 }
52
53 private static class IllegalValueKind extends ValueKind<IllegalValueKind> {
54
55 IllegalValueKind() {
56 super(IllegalKind.ILLEGAL);
57 }
58
59 @Override
60 public IllegalValueKind changeType(PlatformKind newPlatformKind) {
61 return this;
62 }
63 }
64
65 /**
66 * The non-type.
67 */
68 public static final ValueKind<?> Illegal = new IllegalValueKind();
69
70 private final PlatformKind platformKind;
71
72 public ValueKind(PlatformKind platformKind) {
73 this.platformKind = platformKind;
74 }
75
76 public final PlatformKind getPlatformKind() {
77 return platformKind;
78 }
79
80 /**
81 * Create a new {@link ValueKind} with a different {@link PlatformKind}. Subclasses should
82 * override this to preserve the additional information added by the compiler.
83 */
84 public abstract K changeType(PlatformKind newPlatformKind);
85 }