Mercurial > hg > truffle
annotate graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/NullConstant.java @ 21594:cc9e15bbbd3c
SSAMoveResolver: add support for non-virtual stack slots.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Fri, 29 May 2015 12:08:54 +0200 |
parents | 48c1ebd24120 |
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1 /* |
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2 * Copyright (c) 2014, 2014, 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 com.oracle.jvmci.meta; |
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24 |
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25 /** |
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26 * The implementation type of the {@link JavaConstant#NULL_POINTER null constant}. |
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27 */ |
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28 final class NullConstant extends AbstractValue implements JavaConstant { |
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29 |
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30 protected NullConstant() { |
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31 super(LIRKind.reference(Kind.Object)); |
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32 } |
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33 |
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34 @Override |
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35 public boolean isNull() { |
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36 return true; |
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37 } |
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38 |
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39 @Override |
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40 public boolean isDefaultForKind() { |
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41 return true; |
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42 } |
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43 |
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44 @Override |
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45 public Object asBoxedPrimitive() { |
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46 throw new IllegalArgumentException(); |
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47 } |
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48 |
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49 @Override |
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50 public int asInt() { |
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51 throw new IllegalArgumentException(); |
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52 } |
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53 |
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54 @Override |
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55 public boolean asBoolean() { |
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56 throw new IllegalArgumentException(); |
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57 } |
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58 |
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59 @Override |
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60 public long asLong() { |
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61 throw new IllegalArgumentException(); |
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62 } |
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63 |
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64 @Override |
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65 public float asFloat() { |
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66 throw new IllegalArgumentException(); |
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67 } |
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68 |
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69 @Override |
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70 public double asDouble() { |
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71 throw new IllegalArgumentException(); |
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72 } |
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73 |
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74 @Override |
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75 public String toString() { |
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76 return JavaConstant.toString(this); |
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77 } |
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78 |
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79 @Override |
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80 public String toValueString() { |
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81 return "null"; |
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82 } |
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83 |
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84 @Override |
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85 public int hashCode() { |
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86 return 13; |
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87 } |
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88 |
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89 @Override |
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90 public boolean equals(Object o) { |
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91 return o instanceof NullConstant; |
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92 } |
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93 } |