Mercurial > hg > truffle
annotate graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/HotSpotMetaspaceConstantImpl.java @ 21696:ca140f8c35be
Empty pointer stamps are also non-null.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Wed, 03 Jun 2015 14:08:29 +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 |
db4254246f9a
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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.hotspot; |
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24 |
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25 import java.util.*; |
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26 |
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27 import com.oracle.jvmci.hotspot.HotSpotVMConfig.CompressEncoding; |
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28 import com.oracle.jvmci.meta.*; |
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29 |
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30 public final class HotSpotMetaspaceConstantImpl extends PrimitiveConstant implements HotSpotMetaspaceConstant, VMConstant, HotSpotProxified { |
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31 |
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32 static HotSpotMetaspaceConstantImpl forMetaspaceObject(Kind kind, long primitive, Object metaspaceObject, boolean compressed) { |
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33 return new HotSpotMetaspaceConstantImpl(kind, primitive, metaspaceObject, compressed); |
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34 } |
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35 |
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36 static Object getMetaspaceObject(Constant constant) { |
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37 return ((HotSpotMetaspaceConstantImpl) constant).metaspaceObject; |
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38 } |
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39 |
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40 private final Object metaspaceObject; |
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41 private final boolean compressed; |
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42 |
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43 private HotSpotMetaspaceConstantImpl(Kind kind, long primitive, Object metaspaceObject, boolean compressed) { |
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44 super(kind, primitive); |
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45 this.metaspaceObject = metaspaceObject; |
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46 this.compressed = compressed; |
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47 } |
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48 |
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49 @Override |
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50 public int hashCode() { |
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51 return super.hashCode() ^ System.identityHashCode(metaspaceObject); |
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52 } |
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53 |
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54 @Override |
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55 public boolean equals(Object o) { |
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56 return o == this || (o instanceof HotSpotMetaspaceConstantImpl && super.equals(o) && Objects.equals(metaspaceObject, ((HotSpotMetaspaceConstantImpl) o).metaspaceObject)); |
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57 } |
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58 |
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59 @Override |
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60 public String toString() { |
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61 return super.toString() + "{" + metaspaceObject + (compressed ? ";compressed}" : "}"); |
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62 } |
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63 |
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64 public boolean isCompressed() { |
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65 return compressed; |
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66 } |
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67 |
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68 public JavaConstant compress(CompressEncoding encoding) { |
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69 assert !isCompressed(); |
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70 HotSpotMetaspaceConstantImpl res = HotSpotMetaspaceConstantImpl.forMetaspaceObject(Kind.Int, encoding.compress(asLong()), metaspaceObject, true); |
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71 assert res.isCompressed(); |
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72 return res; |
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73 } |
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74 |
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75 public JavaConstant uncompress(CompressEncoding encoding) { |
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76 assert isCompressed(); |
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77 HotSpotMetaspaceConstantImpl res = HotSpotMetaspaceConstantImpl.forMetaspaceObject(Kind.Long, encoding.uncompress(asInt()), metaspaceObject, false); |
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78 assert !res.isCompressed(); |
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79 return res; |
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80 } |
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81 |
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82 public HotSpotResolvedObjectType asResolvedJavaType() { |
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83 if (metaspaceObject instanceof HotSpotResolvedObjectType) { |
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84 return (HotSpotResolvedObjectType) metaspaceObject; |
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85 } |
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86 return null; |
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87 } |
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88 |
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89 public long rawValue() { |
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90 return asLong(); |
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91 } |
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92 } |