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annotate c1x4hotspotsrc/HotSpotVM/src/com/sun/hotspot/c1x/HotSpotTypeResolved.java @ 1941:79d04223b8a5

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Added caching for resolved types and resolved fields. This is crucial, because the local load elimination will lead to wrong results, if field equality (of two RiField objects with the same object and the same RiType) is not given. The caching makes sure that the default equals implementation is sufficient.
author Thomas Wuerthinger <wuerthinger@ssw.jku.at>
date Tue, 28 Dec 2010 18:33:26 +0100
parents 71cd4b9610eb
children 177398c6147d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 * Copyright (c) 2010 Sun Microsystems, Inc. All rights reserved.
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3 *
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4 * Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
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5 * that is described in this document. In particular, and without limitation, these intellectual property
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6 * rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
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7 * more additional patents or pending patent applications in the U.S. and in other countries.
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8 *
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9 * U.S. Government Rights - Commercial software. Government users are subject to the Sun
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10 * Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
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11 * supplements.
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12 *
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13 * Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
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14 * registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
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15 * are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
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16 * U.S. and other countries.
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17 *
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18 * UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
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19 * Company, Ltd.
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20 */
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21 package com.sun.hotspot.c1x;
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22
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23 import java.lang.reflect.*;
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24 import java.util.*;
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25
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26 import com.sun.cri.ci.*;
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27 import com.sun.cri.ri.*;
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28 import com.sun.hotspot.c1x.logging.*;
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29
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30 /**
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31 * Implementation of RiType for resolved non-primitive HotSpot classes.
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32 *
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33 * @author Thomas Wuerthinger, Lukas Stadler
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34 */
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35 public class HotSpotTypeResolved implements HotSpotType {
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36
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37 private Class javaMirror;
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38 private String name;
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39 private int accessFlags;
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40 private boolean hasFinalizer;
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41 private boolean hasSubclass;
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42 private boolean hasFinalizableSubclass;
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43 private boolean isInitialized;
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44 private boolean isArrayClass;
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45 private boolean isInstanceClass;
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46 private boolean isInterface;
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47 private int instanceSize;
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48 private RiType componentType;
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49 private HashMap<Integer, RiField> fieldCache;
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50
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51 @Override
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52 public int accessFlags() {
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53 return accessFlags;
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54 }
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55
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56 @Override
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57 public RiType arrayOf() {
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58 Logger.log("arrayOf " + name);
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59 return null;
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60 //return Compiler.getVMEntries().RiType_arrayOf(vmId);
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61 }
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62
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63 @Override
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64 public RiType componentType() {
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65 return Compiler.getVMEntries().RiType_componentType(this);
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66 }
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67
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68 @Override
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69 public RiType exactType() {
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70 if (Modifier.isFinal(accessFlags)) {
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71 return this;
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72 }
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73 return null;
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74 }
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75
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76 @Override
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77 public CiConstant getEncoding(Representation r) {
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78 switch (r) {
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79 case JavaClass:
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80 return CiConstant.forObject(javaMirror);
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81 case ObjectHub:
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82 return CiConstant.forObject(this);
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83 case StaticFields:
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84 return CiConstant.forObject(this);
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85 case TypeInfo:
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86 return CiConstant.forObject(this);
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87 default:
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88 return null;
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89 }
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90 }
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91
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92 @Override
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93 public CiKind getRepresentationKind(Representation r) {
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94 return CiKind.Object;
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95 }
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96
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97 @Override
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98 public boolean hasFinalizableSubclass() {
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99 return hasFinalizableSubclass;
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100 }
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101
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102 @Override
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103 public boolean hasFinalizer() {
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104 return hasFinalizer;
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105 }
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106
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107 @Override
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108 public boolean hasSubclass() {
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109 return hasSubclass;
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110 }
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111
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112 @Override
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113 public boolean isArrayClass() {
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114 return isArrayClass;
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115 }
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116
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117 @Override
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118 public boolean isInitialized() {
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119 return isInitialized;
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120 }
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121
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122 @Override
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123 public boolean isInstance(Object obj) {
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124 return javaMirror.isInstance(obj);
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125 }
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126
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127 @Override
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128 public boolean isInstanceClass() {
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129 return isInstanceClass;
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130 }
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131
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132 @Override
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133 public boolean isInterface() {
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134 return isInterface;
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135 }
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136
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137 @Override
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138 public boolean isResolved() {
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139 return true;
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140 }
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141
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142 @Override
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143 public boolean isSubtypeOf(RiType other) {
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144 if (other instanceof HotSpotTypeResolved) {
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145 return Compiler.getVMEntries().RiType_isSubtypeOf(this, other);
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146 }
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147 // No resolved type is a subtype of an unresolved type.
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148 return false;
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149 }
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150
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151 @Override
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152 public Class<?> javaClass() {
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153 return javaMirror;
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154 }
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155
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156 @Override
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157 public CiKind kind() {
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158 return CiKind.Object;
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159 }
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160
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161 @Override
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162 public String name() {
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163 return "L" + name + ";";
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164 }
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165
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166 @Override
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167 public String simpleName() {
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168 return name;
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169 }
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170
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171 @Override
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172 public RiMethod resolveMethodImpl(RiMethod method) {
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173 assert method instanceof HotSpotMethod;
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174 return Compiler.getVMEntries().RiType_resolveMethodImpl(this, method.name(), method.signature().asString());
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175 }
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176
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177 @Override
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178 public String toString() {
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179 return "HotSpotType<" + name + ", resolved>";
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180 }
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181
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182 public RiConstantPool constantPool() {
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183 return Compiler.getVMEntries().RiType_constantPool(this);
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184 }
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185
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186 public int instanceSize() {
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187 return instanceSize;
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188 }
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189
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190 public RiField createRiField(String name, RiType type, int offset) {
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191 RiField result = null;
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192
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193 // (tw) Must cache the fields, because the local load elimination only works if the objects from two field lookups are equal.
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194 if (fieldCache == null) {
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195 fieldCache = new HashMap<Integer, RiField>(8);
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196 } else {
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197 result = fieldCache.get(offset);
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198 }
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199
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200 if (result == null) {
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201 result = new HotSpotField(this, name, type, offset);
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202 fieldCache.put(offset, result);
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203 }
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204
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205 return result;
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206 }
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207
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208 }