Mercurial > hg > graal-compiler
annotate graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/HotSpotObjectConstantImpl.java @ 21551:5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 26 May 2015 17:13:37 +0200 |
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21551
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
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1 /* |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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2 * Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved. |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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4 * |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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5 * This code is free software; you can redistribute it and/or modify it |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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6 * under the terms of the GNU General Public License version 2 only, as |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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7 * published by the Free Software Foundation. |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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8 * |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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12 * version 2 for more details (a copy is included in the LICENSE file that |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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13 * accompanied this code). |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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14 * |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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15 * You should have received a copy of the GNU General Public License version |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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18 * |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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20 * or visit www.oracle.com if you need additional information or have any |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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21 * questions. |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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22 */ |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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23 package com.oracle.jvmci.hotspot; |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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24 |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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25 import static com.oracle.jvmci.hotspot.HotSpotResolvedObjectTypeImpl.*; |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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26 |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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27 import java.lang.invoke.*; |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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28 |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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29 import com.oracle.graal.api.meta.*; |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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30 |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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31 import edu.umd.cs.findbugs.annotations.*; |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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32 |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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33 /** |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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34 * Represents a constant non-{@code null} object reference, within the compiler and across the |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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35 * compiler/runtime interface. |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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36 */ |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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37 public final class HotSpotObjectConstantImpl extends AbstractValue implements HotSpotObjectConstant, HotSpotProxified { |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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38 |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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39 public static JavaConstant forObject(Object object) { |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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40 return forObject(object, false); |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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41 } |
5324104ac4f3
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42 |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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43 static JavaConstant forObject(Object object, boolean compressed) { |
5324104ac4f3
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44 if (object == null) { |
5324104ac4f3
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45 return compressed ? HotSpotCompressedNullConstant.COMPRESSED_NULL : JavaConstant.NULL_POINTER; |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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46 } else { |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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47 return new HotSpotObjectConstantImpl(object, compressed); |
5324104ac4f3
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48 } |
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49 } |
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50 |
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51 static JavaConstant forStableArray(Object object, int stableDimension, boolean isDefaultStable) { |
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52 if (object == null) { |
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53 return JavaConstant.NULL_POINTER; |
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54 } else { |
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55 assert object.getClass().isArray(); |
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56 return new HotSpotObjectConstantImpl(object, false, stableDimension, isDefaultStable); |
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57 } |
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58 } |
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59 |
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60 public static JavaConstant forBoxedValue(Kind kind, Object value) { |
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61 if (kind == Kind.Object) { |
5324104ac4f3
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62 return HotSpotObjectConstantImpl.forObject(value); |
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63 } else { |
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64 return JavaConstant.forBoxedPrimitive(value); |
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65 } |
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66 } |
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67 |
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68 static Object asBoxedValue(Constant constant) { |
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69 if (JavaConstant.isNull(constant)) { |
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70 return null; |
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71 } else if (constant instanceof HotSpotObjectConstantImpl) { |
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72 return ((HotSpotObjectConstantImpl) constant).object; |
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73 } else { |
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74 return ((JavaConstant) constant).asBoxedPrimitive(); |
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75 } |
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76 } |
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77 |
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78 private final Object object; |
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79 private final boolean compressed; |
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80 private final byte stableDimension; |
5324104ac4f3
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81 private final boolean isDefaultStable; |
5324104ac4f3
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82 |
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83 private HotSpotObjectConstantImpl(Object object, boolean compressed, int stableDimension, boolean isDefaultStable) { |
5324104ac4f3
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84 super(LIRKind.reference(compressed ? Kind.Int : Kind.Object)); |
5324104ac4f3
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85 this.object = object; |
5324104ac4f3
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86 this.compressed = compressed; |
5324104ac4f3
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87 this.stableDimension = (byte) stableDimension; |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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88 this.isDefaultStable = isDefaultStable; |
5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
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89 assert object != null; |
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90 assert stableDimension == 0 || (object != null && object.getClass().isArray()); |
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91 assert stableDimension >= 0 && stableDimension <= 255; |
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92 assert !isDefaultStable || stableDimension > 0; |
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93 } |
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94 |
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95 private HotSpotObjectConstantImpl(Object object, boolean compressed) { |
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96 this(object, compressed, 0, false); |
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97 } |
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98 |
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99 /** |
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100 * Package-private accessor for the object represented by this constant. |
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101 */ |
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102 Object object() { |
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103 return object; |
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104 } |
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105 |
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106 /** |
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107 * Determines if the object represented by this constant is {@link Object#equals(Object) equal} |
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108 * to a given object. |
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109 */ |
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110 public boolean isEqualTo(Object obj) { |
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111 return object.equals(obj); |
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112 } |
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113 |
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114 /** |
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115 * Gets the class of the object represented by this constant. |
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116 */ |
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117 public Class<?> getObjectClass() { |
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118 return object.getClass(); |
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119 } |
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120 |
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121 public boolean isCompressed() { |
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122 return compressed; |
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123 } |
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124 |
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125 public JavaConstant compress() { |
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126 assert !compressed; |
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127 return new HotSpotObjectConstantImpl(object, true, stableDimension, isDefaultStable); |
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128 } |
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129 |
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130 public JavaConstant uncompress() { |
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131 assert compressed; |
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132 return new HotSpotObjectConstantImpl(object, false, stableDimension, isDefaultStable); |
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133 } |
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134 |
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135 public HotSpotResolvedObjectType getType() { |
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136 return fromObjectClass(object.getClass()); |
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137 } |
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138 |
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139 public JavaConstant getClassLoader() { |
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140 if (object instanceof Class) { |
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141 /* |
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142 * This is an intrinsic for getClassLoader0, which occurs after any security checks. We |
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143 * can't call that directly so just call getClassLoader. |
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144 */ |
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145 return HotSpotObjectConstantImpl.forObject(((Class<?>) object).getClassLoader()); |
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146 } |
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147 return null; |
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148 } |
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149 |
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150 public int getIdentityHashCode() { |
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151 return System.identityHashCode(object); |
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152 } |
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153 |
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154 public JavaConstant getComponentType() { |
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155 if (object instanceof Class) { |
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156 return HotSpotObjectConstantImpl.forObject(((Class<?>) object).getComponentType()); |
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157 } |
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158 return null; |
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159 } |
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160 |
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161 public JavaConstant getSuperclass() { |
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162 if (object instanceof Class) { |
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163 return HotSpotObjectConstantImpl.forObject(((Class<?>) object).getSuperclass()); |
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164 } |
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165 return null; |
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166 } |
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167 |
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168 public JavaConstant getCallSiteTarget(Assumptions assumptions) { |
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169 if (object instanceof CallSite) { |
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170 CallSite callSite = (CallSite) object; |
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171 MethodHandle target = callSite.getTarget(); |
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172 if (!(callSite instanceof ConstantCallSite)) { |
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173 if (assumptions == null) { |
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174 return null; |
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175 } |
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176 assumptions.record(new Assumptions.CallSiteTargetValue(callSite, target)); |
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177 } |
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178 return HotSpotObjectConstantImpl.forObject(target); |
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179 } |
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180 return null; |
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181 } |
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182 |
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183 @SuppressFBWarnings(value = "ES_COMPARING_STRINGS_WITH_EQ", justification = "reference equality is what we want") |
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184 public boolean isInternedString() { |
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185 if (object instanceof String) { |
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186 String s = (String) object; |
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187 return s.intern() == s; |
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188 } |
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189 return false; |
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190 } |
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191 |
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192 public <T> T asObject(Class<T> type) { |
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193 if (type.isInstance(object)) { |
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194 return type.cast(object); |
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195 } |
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196 return null; |
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197 } |
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198 |
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199 public Object asObject(ResolvedJavaType type) { |
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200 if (type.isInstance(this)) { |
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201 return object; |
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202 } |
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203 return null; |
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204 } |
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205 |
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206 @Override |
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207 public boolean isNull() { |
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208 return false; |
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209 } |
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210 |
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211 @Override |
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212 public boolean isDefaultForKind() { |
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213 return false; |
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214 } |
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215 |
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216 @Override |
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217 public Object asBoxedPrimitive() { |
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218 throw new IllegalArgumentException(); |
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219 } |
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220 |
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221 @Override |
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222 public int asInt() { |
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223 throw new IllegalArgumentException(); |
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224 } |
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225 |
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226 @Override |
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227 public boolean asBoolean() { |
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228 throw new IllegalArgumentException(); |
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229 } |
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230 |
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231 @Override |
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232 public long asLong() { |
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233 throw new IllegalArgumentException(); |
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234 } |
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235 |
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236 @Override |
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237 public float asFloat() { |
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238 throw new IllegalArgumentException(); |
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239 } |
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240 |
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241 @Override |
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242 public double asDouble() { |
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243 throw new IllegalArgumentException(); |
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244 } |
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245 |
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246 @Override |
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247 public int hashCode() { |
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248 return System.identityHashCode(object); |
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249 } |
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250 |
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251 @Override |
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252 public boolean equals(Object o) { |
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253 if (o == this) { |
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254 return true; |
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255 } else if (o instanceof HotSpotObjectConstantImpl) { |
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256 HotSpotObjectConstantImpl other = (HotSpotObjectConstantImpl) o; |
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257 return super.equals(o) && object == other.object && compressed == other.compressed && stableDimension == other.stableDimension && isDefaultStable == other.isDefaultStable; |
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258 } |
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259 return false; |
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260 } |
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261 |
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262 @Override |
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263 public String toValueString() { |
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|
264 if (object instanceof String) { |
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265 return (String) object; |
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266 } else { |
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267 return Kind.Object.format(object); |
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268 } |
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269 } |
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270 |
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|
271 @Override |
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272 public String toString() { |
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273 return (compressed ? "NarrowOop" : getKind().getJavaName()) + "[" + Kind.Object.format(object) + "]"; |
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274 } |
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|
275 |
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276 /** |
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277 * Number of stable dimensions if this constant is a stable array. |
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278 */ |
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279 public int getStableDimension() { |
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280 return stableDimension & 0xff; |
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281 } |
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282 |
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283 /** |
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284 * Returns {@code true} if this is a stable array constant and its elements should be considered |
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285 * as stable regardless of whether they are default values. |
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286 */ |
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287 public boolean isDefaultStable() { |
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288 return isDefaultStable; |
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289 } |
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290 } |