Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/ValueKind.java @ 23396:9ed5b586018b
Replace LIRKind with abstract base class (JDK-8156942).
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Fri, 13 May 2016 14:33:19 +0200 |
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children | a7b12c1ab514 |
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9ed5b586018b
Replace LIRKind with abstract base class (JDK-8156942).
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1 /* |
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2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package jdk.vm.ci.meta; |
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24 |
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25 /** |
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26 * Represents the type of {@link Value values}. This class can be extended by compilers to track |
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27 * additional information about values. |
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28 */ |
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29 public abstract class ValueKind<K extends ValueKind<K>> { |
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30 |
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31 private enum IllegalKind implements PlatformKind { |
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32 ILLEGAL; |
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33 |
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34 private final EnumKey<IllegalKind> key = new EnumKey<>(this); |
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35 |
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36 public Key getKey() { |
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37 return key; |
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38 } |
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39 |
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40 public int getSizeInBytes() { |
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41 return 0; |
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42 } |
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43 |
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44 public int getVectorLength() { |
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45 return 0; |
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46 } |
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47 |
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48 public char getTypeChar() { |
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49 return '-'; |
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50 } |
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51 } |
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52 |
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53 private static class IllegalValueKind extends ValueKind<IllegalValueKind> { |
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54 |
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55 IllegalValueKind() { |
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56 super(IllegalKind.ILLEGAL); |
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57 } |
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58 |
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59 @Override |
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60 public IllegalValueKind changeType(PlatformKind newPlatformKind) { |
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61 return this; |
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62 } |
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63 } |
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64 |
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65 /** |
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66 * The non-type. |
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67 */ |
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68 public static final ValueKind<?> Illegal = new IllegalValueKind(); |
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69 |
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70 private final PlatformKind platformKind; |
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71 |
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72 public ValueKind(PlatformKind platformKind) { |
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73 this.platformKind = platformKind; |
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74 } |
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75 |
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76 public final PlatformKind getPlatformKind() { |
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77 return platformKind; |
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78 } |
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79 |
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80 /** |
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81 * Create a new {@link ValueKind} with a different {@link PlatformKind}. Subclasses should |
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82 * override this to preserve the additional information added by the compiler. |
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83 */ |
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84 public abstract K changeType(PlatformKind newPlatformKind); |
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85 } |