Mercurial > hg > truffle
annotate graal/com.oracle.truffle.object/src/com/oracle/truffle/object/ShapeImpl.java @ 21901:19340125f182
Truffle: model property replace as direct transition
author | Andreas Woess <andreas.woess@oracle.com> |
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date | Wed, 10 Jun 2015 20:06:13 +0200 |
parents | cb051c368c80 |
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1 /* |
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2 * Copyright (c) 2012, 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.truffle.object; |
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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.truffle.api.*; |
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28 import com.oracle.truffle.api.CompilerDirectives.CompilationFinal; |
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29 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary; |
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30 import com.oracle.truffle.api.interop.*; |
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31 import com.oracle.truffle.api.nodes.*; |
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32 import com.oracle.truffle.api.object.*; |
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33 import com.oracle.truffle.api.utilities.*; |
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34 import com.oracle.truffle.object.LocationImpl.InternalLongLocation; |
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35 import com.oracle.truffle.object.LocationImpl.LocationVisitor; |
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36 import com.oracle.truffle.object.Locations.ConstantLocation; |
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37 import com.oracle.truffle.object.Locations.DeclaredDualLocation; |
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38 import com.oracle.truffle.object.Locations.DeclaredLocation; |
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39 import com.oracle.truffle.object.Locations.DualLocation; |
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40 import com.oracle.truffle.object.Locations.ValueLocation; |
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41 import com.oracle.truffle.object.Transition.AddPropertyTransition; |
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42 import com.oracle.truffle.object.Transition.DirectReplacePropertyTransition; |
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43 import com.oracle.truffle.object.Transition.ObjectTypeTransition; |
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44 import com.oracle.truffle.object.Transition.PropertyTransition; |
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45 import com.oracle.truffle.object.Transition.RemovePropertyTransition; |
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46 import com.oracle.truffle.object.Transition.ReservePrimitiveArrayTransition; |
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47 |
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48 /** |
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49 * Shape objects create a mapping of Property objects to indexes. The mapping of those indexes to an |
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50 * actual store is not part of Shape's role, but JSObject's. Shapes are immutable; adding or |
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51 * deleting a property yields a new Shape which links to the old one. This allows inline caching to |
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52 * simply check the identity of an object's Shape to determine if the cache is valid. There is one |
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53 * exception to this immutability, the transition map, but that is used simply to assure that an |
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54 * identical series of property additions and deletions will yield the same Shape object. |
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55 * |
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56 * @see DynamicObject |
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57 * @see Property |
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58 * @see Locations |
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59 */ |
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60 public abstract class ShapeImpl extends Shape { |
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61 private final int id; |
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62 |
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63 protected final LayoutImpl layout; |
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64 protected final ObjectType objectType; |
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65 protected final ShapeImpl parent; |
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66 protected final PropertyMap propertyMap; |
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67 |
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68 private final Object extraData; |
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69 private final Object sharedData; |
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70 private final ShapeImpl root; |
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71 |
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72 protected final int objectArraySize; |
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73 protected final int objectArrayCapacity; |
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74 protected final int objectFieldSize; |
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75 protected final int primitiveFieldSize; |
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76 protected final int primitiveArraySize; |
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77 protected final int primitiveArrayCapacity; |
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78 protected final boolean hasPrimitiveArray; |
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79 |
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80 protected final int depth; |
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81 protected final int propertyCount; |
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82 protected Property[] propertyArray; |
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83 |
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84 protected final Assumption validAssumption; |
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85 @CompilationFinal protected volatile Assumption leafAssumption; |
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86 |
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87 /** |
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88 * Shape transition map; lazily initialized. |
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89 * |
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90 * @see #getTransitionMapForRead() |
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91 * @see #getTransitionMapForWrite() |
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92 */ |
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93 private HashMap<Transition, ShapeImpl> transitionMap; |
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94 |
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95 private final Transition transitionFromParent; |
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96 |
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97 /** |
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98 * Private constructor. |
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99 * |
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100 * @param parent predecessor shape |
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101 * @param transitionFromParent direct transition from parent shape |
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102 * @see #ShapeImpl(Layout, ShapeImpl, ObjectType, Object, PropertyMap, Transition, |
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103 * BaseAllocator, int) |
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104 */ |
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105 private ShapeImpl(Layout layout, ShapeImpl parent, ObjectType objectType, Object sharedData, PropertyMap propertyMap, Transition transitionFromParent, int objectArraySize, int objectFieldSize, |
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106 int primitiveFieldSize, int primitiveArraySize, boolean hasPrimitiveArray, int id) { |
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107 this.layout = (LayoutImpl) layout; |
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108 this.objectType = Objects.requireNonNull(objectType); |
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109 this.propertyMap = Objects.requireNonNull(propertyMap); |
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110 this.root = parent != null ? parent.getRoot() : this; |
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111 this.parent = parent; |
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112 this.transitionFromParent = transitionFromParent; |
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113 this.objectArraySize = objectArraySize; |
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114 this.objectArrayCapacity = capacityFromSize(objectArraySize); |
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115 this.objectFieldSize = objectFieldSize; |
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116 this.primitiveFieldSize = primitiveFieldSize; |
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117 this.primitiveArraySize = primitiveArraySize; |
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118 this.primitiveArrayCapacity = capacityFromSize(primitiveArraySize); |
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119 this.hasPrimitiveArray = hasPrimitiveArray; |
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120 |
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121 if (parent != null) { |
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122 this.propertyCount = makePropertyCount(parent, propertyMap); |
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123 this.propertyArray = makePropertiesList(parent, propertyMap); |
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124 this.depth = parent.depth + 1; |
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125 } else { |
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126 this.propertyCount = 0; |
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127 this.propertyArray = null; |
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128 this.depth = 0; |
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129 } |
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130 |
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131 this.validAssumption = createValidAssumption(); |
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132 |
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133 this.id = id; |
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134 shapeCount.inc(); |
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135 |
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136 this.sharedData = sharedData; |
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137 this.extraData = objectType.createShapeData(this); |
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138 |
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139 debugRegisterShape(this); |
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140 } |
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141 |
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142 protected ShapeImpl(Layout layout, ShapeImpl parent, ObjectType operations, Object sharedData, PropertyMap propertyMap, Transition transition, Allocator allocator, int id) { |
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143 this(layout, parent, operations, sharedData, propertyMap, transition, ((BaseAllocator) allocator).objectArraySize, ((BaseAllocator) allocator).objectFieldSize, |
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144 ((BaseAllocator) allocator).primitiveFieldSize, ((BaseAllocator) allocator).primitiveArraySize, ((BaseAllocator) allocator).hasPrimitiveArray, id); |
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145 } |
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146 |
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147 @SuppressWarnings("hiding") |
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148 protected abstract ShapeImpl createShape(Layout layout, Object sharedData, ShapeImpl parent, ObjectType operations, PropertyMap propertyMap, Transition transition, Allocator allocator, int id); |
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149 |
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150 protected ShapeImpl(Layout layout, ObjectType operations, Object sharedData, int id) { |
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151 this(layout, null, operations, sharedData, PropertyMap.empty(), null, layout.createAllocator(), id); |
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152 } |
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153 |
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154 private static int makePropertyCount(ShapeImpl parent, PropertyMap propertyMap) { |
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155 return parent.propertyCount + ((propertyMap.size() > parent.propertyMap.size() && !propertyMap.getLastProperty().isHidden() && !propertyMap.getLastProperty().isShadow()) ? 1 : 0); |
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156 } |
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157 |
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158 private static Property[] makePropertiesList(ShapeImpl parent, PropertyMap propertyMap) { |
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159 Property[] properties = parent.propertyArray; |
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160 if (properties != null && propertyMap.size() != parent.propertyMap.size()) { |
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161 Property lastProperty = propertyMap.getLastProperty(); |
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162 if (lastProperty != null && !lastProperty.isHidden()) { |
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163 propertyListAllocCount.inc(); |
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164 if (!lastProperty.isShadow()) { |
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165 properties = Arrays.copyOf(properties, properties.length + 1); |
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166 properties[properties.length - 1] = lastProperty; |
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167 } else { |
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168 properties = Arrays.copyOf(properties, properties.length); |
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169 for (int i = 0; i < properties.length; i++) { |
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170 if (properties[i].isSame(lastProperty)) { |
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171 properties[i] = lastProperty; |
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172 } |
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173 } |
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174 } |
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175 } else { |
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176 propertyListShareCount.inc(); |
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177 } |
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178 } |
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179 return properties; |
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180 } |
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181 |
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182 @Override |
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183 public final Property getLastProperty() { |
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184 return propertyMap.getLastProperty(); |
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185 } |
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186 |
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187 @Override |
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188 public final int getId() { |
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189 return this.id; |
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190 } |
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191 |
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192 /** |
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193 * Calculate array size for the given number of elements. |
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194 */ |
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195 private static int capacityFromSize(int size) { |
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196 if (size == 0) { |
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197 return 0; |
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198 } else if (size < 4) { |
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199 return 4; |
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200 } else if (size < 32) { |
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201 return ((size + 7) / 8) * 8; |
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202 } else { |
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203 return ((size + 15) / 16) * 16; |
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204 } |
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205 } |
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206 |
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207 @Override |
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208 public final int getObjectArraySize() { |
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209 return objectArraySize; |
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210 } |
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211 |
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212 @Override |
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213 public final int getObjectFieldSize() { |
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214 return objectFieldSize; |
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215 } |
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216 |
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217 @Override |
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218 public final int getPrimitiveFieldSize() { |
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219 return primitiveFieldSize; |
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220 } |
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221 |
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222 @Override |
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223 public final int getObjectArrayCapacity() { |
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224 return objectArrayCapacity; |
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225 } |
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226 |
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227 @Override |
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228 public final int getPrimitiveArrayCapacity() { |
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229 return primitiveArrayCapacity; |
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230 } |
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231 |
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232 @Override |
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233 public final int getPrimitiveArraySize() { |
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234 return primitiveArraySize; |
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235 } |
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236 |
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237 @Override |
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238 public final boolean hasPrimitiveArray() { |
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239 return hasPrimitiveArray; |
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240 } |
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241 |
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242 /** |
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243 * Get the (parent) shape that holds the given property. |
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244 */ |
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245 public final ShapeImpl getShapeFromProperty(Object propertyName) { |
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246 ShapeImpl current = this; |
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247 while (current != getRoot()) { |
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248 if (current.getTransitionFromParent() instanceof AddPropertyTransition && ((AddPropertyTransition) current.getTransitionFromParent()).getProperty().getKey().equals(propertyName)) { |
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249 return current; |
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250 } |
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251 current = current.getParent(); |
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252 } |
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253 |
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254 return null; |
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255 } |
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256 |
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257 /** |
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258 * Get the (parent) shape that holds the given property. |
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259 */ |
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260 public final ShapeImpl getShapeFromProperty(Property prop) { |
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261 ShapeImpl current = this; |
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262 while (current != getRoot()) { |
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263 if (current.getTransitionFromParent() instanceof AddPropertyTransition && ((AddPropertyTransition) current.getTransitionFromParent()).getProperty().equals(prop)) { |
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264 return current; |
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265 } |
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266 current = current.parent; |
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267 } |
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268 |
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269 return null; |
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270 } |
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271 |
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272 /** |
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273 * Get a property entry by string name. |
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274 * |
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275 * @param key the name to look up |
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276 * @return a Property object, or null if not found |
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277 */ |
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278 @Override |
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279 @TruffleBoundary |
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280 public Property getProperty(Object key) { |
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281 return propertyMap.get(key); |
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282 } |
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283 |
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284 protected final void addDirectTransition(Transition transition, ShapeImpl next) { |
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285 assert next.getParent() == this && transition.isDirect(); |
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286 addTransitionInternal(transition, next); |
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287 } |
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288 |
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289 public final void addIndirectTransition(Transition transition, ShapeImpl next) { |
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290 assert next.getParent() != this && !transition.isDirect(); |
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291 addTransitionInternal(transition, next); |
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292 } |
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293 |
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294 private void addTransitionInternal(Transition transition, ShapeImpl next) { |
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295 getTransitionMapForWrite().put(transition, next); |
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296 } |
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297 |
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298 public final Map<Transition, ShapeImpl> getTransitionMapForRead() { |
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299 return transitionMap != null ? transitionMap : Collections.<Transition, ShapeImpl> emptyMap(); |
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300 } |
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301 |
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302 private Map<Transition, ShapeImpl> getTransitionMapForWrite() { |
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303 if (transitionMap != null) { |
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304 return transitionMap; |
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305 } else { |
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306 invalidateLeafAssumption(); |
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307 return transitionMap = new HashMap<>(); |
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308 } |
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309 } |
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310 |
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311 public final PropertyMap getPropertyMap() { |
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312 return propertyMap; |
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313 } |
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314 |
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315 protected final ShapeImpl queryTransition(Transition transition) { |
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316 ShapeImpl cachedShape = this.getTransitionMapForRead().get(transition); |
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317 if (cachedShape != null) { // Shape already exists? |
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318 shapeCacheHitCount.inc(); |
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319 return (ShapeImpl) layout.getStrategy().returnCached(cachedShape); |
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320 } |
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321 shapeCacheMissCount.inc(); |
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322 |
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323 return null; |
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324 } |
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325 |
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326 /** |
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327 * Add a new property in the map, yielding a new or cached Shape object. |
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328 * |
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329 * @param property the property to add |
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330 * @return the new Shape |
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331 */ |
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332 @TruffleBoundary |
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333 @Override |
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334 public ShapeImpl addProperty(Property property) { |
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335 assert isValid(); |
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336 onPropertyTransition(property); |
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337 return addPropertyInternal(property); |
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338 } |
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339 |
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340 protected final void onPropertyTransition(Property property) { |
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341 if (sharedData instanceof ShapeListener) { |
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342 ((ShapeListener) sharedData).onPropertyTransition(property.getKey()); |
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343 } |
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344 } |
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345 |
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346 /** |
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347 * Add a new property in the map, yielding a new or cached Shape object. |
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348 * |
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349 * In contrast to {@link ShapeImpl#addProperty(Property)}, this method does not care about |
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350 * obsolete shapes. |
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351 * |
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352 * @see #addProperty(Property) |
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353 */ |
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354 private ShapeImpl addPropertyInternal(Property prop) { |
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355 CompilerAsserts.neverPartOfCompilation(); |
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356 assert prop.isShadow() || !(this.hasProperty(prop.getKey())) : "duplicate property " + prop.getKey(); |
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357 // assertion caused performance issues on e.g. testv8 regress-619.js |
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358 // assert !getPropertyListInternal(false).contains(prop); |
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359 |
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360 AddPropertyTransition addTransition = new AddPropertyTransition(prop); |
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361 ShapeImpl cachedShape = queryTransition(addTransition); |
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362 if (cachedShape != null) { |
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363 return cachedShape; |
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364 } |
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365 |
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366 ShapeImpl oldShape = (ShapeImpl) layout.getStrategy().ensureSpace(this, prop.getLocation()); |
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367 |
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368 ShapeImpl newShape = makeShapeWithAddedProperty(oldShape, addTransition); |
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369 oldShape.addDirectTransition(addTransition, newShape); |
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370 return newShape; |
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371 } |
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372 |
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373 protected ShapeImpl cloneRoot(ShapeImpl from, Object newSharedData) { |
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374 return createShape(from.layout, newSharedData, null, from.objectType, from.propertyMap, null, from.allocator(), from.id); |
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375 } |
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376 |
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377 /** |
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378 * Create a separate clone of a shape. |
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379 * |
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380 * @param newParent the cloned parent shape |
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381 */ |
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382 protected final ShapeImpl cloneOnto(ShapeImpl newParent) { |
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383 ShapeImpl from = this; |
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384 ShapeImpl newShape = createShape(newParent.layout, newParent.sharedData, newParent, from.objectType, from.propertyMap, from.transitionFromParent, from.allocator(), newParent.id); |
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385 |
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386 shapeCloneCount.inc(); |
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387 |
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388 // (aw) need to have this transition for obsolescence |
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389 newParent.addDirectTransition(from.transitionFromParent, newShape); |
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390 return newShape; |
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391 } |
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392 |
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393 public final Transition getTransitionFromParent() { |
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394 return transitionFromParent; |
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395 } |
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396 |
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397 /** |
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398 * Create a new shape that adds a property to the parent shape. |
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399 */ |
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400 private static ShapeImpl makeShapeWithAddedProperty(ShapeImpl parent, AddPropertyTransition addTransition) { |
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401 Property addend = addTransition.getProperty(); |
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402 BaseAllocator allocator = parent.allocator().addLocation(addend.getLocation()); |
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403 |
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404 PropertyMap newPropertyMap = parent.propertyMap.putCopy(addend); |
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405 |
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406 ShapeImpl newShape = parent.createShape(parent.layout, parent.sharedData, parent, parent.objectType, newPropertyMap, addTransition, allocator, parent.id); |
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407 assert ((LocationImpl) addend.getLocation()).primitiveArrayCount() == 0 || newShape.hasPrimitiveArray; |
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408 assert newShape.depth == allocator.depth; |
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409 return newShape; |
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410 } |
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411 |
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412 /** |
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413 * Create a new shape that reserves the primitive extension array field. |
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414 */ |
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415 private static ShapeImpl makeShapeWithPrimitiveExtensionArray(ShapeImpl parent, Transition transition) { |
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416 assert parent.getLayout().hasPrimitiveExtensionArray(); |
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417 assert !parent.hasPrimitiveArray(); |
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418 BaseAllocator allocator = parent.allocator().addLocation(parent.getLayout().getPrimitiveArrayLocation()); |
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419 ShapeImpl newShape = parent.createShape(parent.layout, parent.sharedData, parent, parent.objectType, parent.propertyMap, transition, allocator, parent.id); |
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420 assert newShape.hasPrimitiveArray(); |
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421 assert newShape.depth == allocator.depth; |
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422 return newShape; |
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423 } |
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424 |
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425 private ShapeImpl addPrimitiveExtensionArray() { |
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426 assert layout.hasPrimitiveExtensionArray() && !hasPrimitiveArray(); |
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427 Transition transition = new ReservePrimitiveArrayTransition(); |
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428 ShapeImpl cachedShape = queryTransition(transition); |
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429 if (cachedShape != null) { |
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430 return cachedShape; |
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431 } |
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432 |
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433 ShapeImpl oldShape = (ShapeImpl) layout.getStrategy().ensureSpace(this, layout.getPrimitiveArrayLocation()); |
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434 ShapeImpl newShape = makeShapeWithPrimitiveExtensionArray(oldShape, transition); |
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435 oldShape.addDirectTransition(transition, newShape); |
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436 return newShape; |
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437 } |
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438 |
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439 /** |
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440 * Are these two shapes related, i.e. do they have the same root? |
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441 * |
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442 * @param other Shape to compare to |
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443 * @return true if one shape is an upcast of the other, or the Shapes are equal |
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444 */ |
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445 @Override |
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446 public boolean isRelated(Shape other) { |
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447 if (this == other) { |
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448 return true; |
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449 } |
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450 if (this.getRoot() == getRoot()) { |
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451 return true; |
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452 } |
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453 return false; |
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454 } |
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455 |
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456 /** |
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457 * Get a list of all properties that this Shape stores. |
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458 * |
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459 * @return list of properties |
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460 */ |
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461 @TruffleBoundary |
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462 @Override |
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463 public final List<Property> getPropertyList(Pred<Property> filter) { |
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464 LinkedList<Property> props = new LinkedList<>(); |
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465 next: for (Property currentProperty : this.propertyMap.reverseOrderValues()) { |
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466 if (!currentProperty.isHidden() && filter.test(currentProperty)) { |
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467 if (currentProperty.getLocation() instanceof DeclaredLocation) { |
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468 for (Iterator<Property> iter = props.iterator(); iter.hasNext();) { |
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469 Property other = iter.next(); |
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470 if (other.isShadow() && other.getKey().equals(currentProperty.getKey())) { |
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471 iter.remove(); |
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472 props.addFirst(other); |
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473 continue next; |
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474 } |
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475 } |
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476 } |
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477 props.addFirst(currentProperty); |
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478 } |
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479 } |
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480 return props; |
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481 } |
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482 |
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483 @Override |
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484 public final List<Property> getPropertyList() { |
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485 return getPropertyList(ALL); |
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486 } |
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487 |
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488 /** |
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489 * Returns all (also hidden) Property objects in this shape. |
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490 * |
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491 * @param ascending desired order |
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492 */ |
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493 @TruffleBoundary |
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494 @Override |
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495 public final List<Property> getPropertyListInternal(boolean ascending) { |
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496 LinkedList<Property> props = new LinkedList<>(); |
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497 for (Property current : this.propertyMap.reverseOrderValues()) { |
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498 if (ascending) { |
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499 props.addFirst(current); |
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500 } else { |
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501 props.add(current); |
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502 } |
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503 } |
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504 return props; |
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505 } |
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506 |
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507 /** |
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508 * Get a list of all (visible) property names in insertion order. |
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509 * |
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510 * @return list of property names |
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511 */ |
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512 @TruffleBoundary |
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513 @Override |
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514 public final List<Object> getKeyList(Pred<Property> filter) { |
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515 LinkedList<Object> keys = new LinkedList<>(); |
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516 for (Property currentProperty : this.propertyMap.reverseOrderValues()) { |
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517 if (!currentProperty.isHidden() && filter.test(currentProperty) && !currentProperty.isShadow()) { |
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518 keys.addFirst(currentProperty.getKey()); |
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519 } |
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520 } |
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521 return keys; |
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522 } |
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523 |
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524 @Override |
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525 public final List<Object> getKeyList() { |
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526 return getKeyList(ALL); |
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527 } |
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528 |
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529 @Override |
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530 public Iterable<Object> getKeys() { |
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531 return getKeyList(); |
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532 } |
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533 |
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534 @Override |
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535 public final boolean isValid() { |
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536 return getValidAssumption().isValid(); |
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537 } |
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538 |
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539 @Override |
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540 public final Assumption getValidAssumption() { |
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541 return validAssumption; |
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542 } |
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543 |
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544 private static Assumption createValidAssumption() { |
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545 return Truffle.getRuntime().createAssumption("valid shape"); |
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546 } |
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547 |
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548 public final void invalidateValidAssumption() { |
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549 getValidAssumption().invalidate(); |
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550 } |
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551 |
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552 @Override |
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553 public final boolean isLeaf() { |
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554 return leafAssumption == null || leafAssumption.isValid(); |
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555 } |
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556 |
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557 @Override |
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558 public final Assumption getLeafAssumption() { |
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559 if (leafAssumption == null) { |
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560 CompilerDirectives.transferToInterpreterAndInvalidate(); |
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561 synchronized (getMutex()) { |
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562 if (leafAssumption == null) { |
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563 leafAssumption = isLeafHelper() ? createLeafAssumption() : NeverValidAssumption.INSTANCE; |
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564 } |
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565 } |
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566 } |
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567 return leafAssumption; |
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568 } |
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569 |
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570 private boolean isLeafHelper() { |
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571 return getTransitionMapForRead().isEmpty(); |
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572 } |
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573 |
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574 private static Assumption createLeafAssumption() { |
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575 return Truffle.getRuntime().createAssumption("leaf shape"); |
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576 } |
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577 |
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578 private void invalidateLeafAssumption() { |
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579 Assumption assumption = leafAssumption; |
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580 if (assumption != null) { |
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581 assumption.invalidate(); |
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582 } else { |
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583 leafAssumption = NeverValidAssumption.INSTANCE; |
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584 } |
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585 } |
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586 |
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587 @Override |
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588 public String toString() { |
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589 return toStringLimit(Integer.MAX_VALUE); |
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590 } |
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591 |
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592 @TruffleBoundary |
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593 public String toStringLimit(int limit) { |
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594 StringBuilder sb = new StringBuilder(); |
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595 sb.append('@'); |
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596 sb.append(Integer.toHexString(hashCode())); |
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597 if (!isValid()) { |
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598 sb.append('!'); |
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599 } |
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600 |
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601 sb.append("{"); |
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602 for (Iterator<Property> iterator = propertyMap.reverseOrderValues().iterator(); iterator.hasNext();) { |
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603 Property p = iterator.next(); |
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604 sb.append(p); |
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605 if (iterator.hasNext()) { |
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606 sb.append(", "); |
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607 } |
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608 if (sb.length() >= limit) { |
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609 sb.append("..."); |
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610 break; |
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611 } |
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612 sb.append("\n"); |
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613 } |
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614 sb.append("}"); |
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615 |
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616 return sb.toString(); |
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617 } |
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618 |
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619 @Override |
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620 public final ShapeImpl getParent() { |
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621 return parent; |
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622 } |
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623 |
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624 public final int getDepth() { |
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625 return depth; |
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626 } |
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627 |
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628 @Override |
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629 public final boolean hasProperty(Object name) { |
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630 return getProperty(name) != null; |
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631 } |
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632 |
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633 @TruffleBoundary |
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634 @Override |
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635 public final ShapeImpl removeProperty(Property prop) { |
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636 onPropertyTransition(prop); |
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637 |
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638 RemovePropertyTransition transition = new RemovePropertyTransition(prop); |
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639 ShapeImpl cachedShape = queryTransition(transition); |
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640 if (cachedShape != null) { |
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641 return cachedShape; |
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642 } |
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643 |
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644 ShapeImpl shape = getShapeFromProperty(prop); |
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645 if (shape != null) { |
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646 List<Transition> transitionList = new ArrayList<>(); |
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647 ShapeImpl current = this; |
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648 while (current != shape) { |
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649 transitionList.add(current.getTransitionFromParent()); |
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650 current = current.parent; |
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651 } |
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652 ShapeImpl newShape = shape.parent; |
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653 for (ListIterator<Transition> iterator = transitionList.listIterator(transitionList.size()); iterator.hasPrevious();) { |
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654 Transition previous = iterator.previous(); |
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655 newShape = newShape.applyTransition(previous, true); |
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656 } |
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657 |
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658 addIndirectTransition(transition, newShape); |
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659 return newShape; |
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660 } else { |
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661 return null; |
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662 } |
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663 } |
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664 |
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665 @TruffleBoundary |
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666 @Override |
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667 public final ShapeImpl append(Property oldProperty) { |
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668 return addProperty(oldProperty.relocate(allocator().moveLocation(oldProperty.getLocation()))); |
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669 } |
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670 |
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671 public final ShapeImpl applyTransition(Transition transition, boolean append) { |
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672 if (transition instanceof AddPropertyTransition) { |
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673 return append ? append(((AddPropertyTransition) transition).getProperty()) : addProperty(((AddPropertyTransition) transition).getProperty()); |
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674 } else if (transition instanceof ObjectTypeTransition) { |
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675 return changeType(((ObjectTypeTransition) transition).getObjectType()); |
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676 } else if (transition instanceof ReservePrimitiveArrayTransition) { |
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677 return reservePrimitiveExtensionArray(); |
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678 } else if (transition instanceof DirectReplacePropertyTransition) { |
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679 return replaceProperty(((DirectReplacePropertyTransition) transition).getPropertyBefore(), ((DirectReplacePropertyTransition) transition).getPropertyAfter()); |
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680 } else { |
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681 throw new UnsupportedOperationException(); |
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682 } |
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683 } |
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684 |
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685 @Override |
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686 public final BaseAllocator allocator() { |
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687 return layout.getStrategy().createAllocator(this); |
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688 } |
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689 |
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690 /** |
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691 * Duplicate shape exchanging existing property with new property. |
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692 */ |
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693 @Override |
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694 public ShapeImpl replaceProperty(Property oldProperty, Property newProperty) { |
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695 assert oldProperty.getKey().equals(newProperty.getKey()); |
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696 |
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697 Transition replacePropertyTransition = new Transition.IndirectReplacePropertyTransition(oldProperty, newProperty); |
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698 ShapeImpl cachedShape = queryTransition(replacePropertyTransition); |
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699 if (cachedShape != null) { |
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700 return cachedShape; |
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701 } |
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702 |
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703 ShapeImpl top = this; |
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704 List<Transition> transitionList = new ArrayList<>(); |
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705 boolean found = false; |
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706 while (top != getRoot() && !found) { |
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707 Transition transition = top.getTransitionFromParent(); |
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708 transitionList.add(transition); |
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709 if (transition instanceof AddPropertyTransition && ((AddPropertyTransition) transition).getProperty().getKey().equals(newProperty.getKey())) { |
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710 found = true; |
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711 } |
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712 top = top.parent; |
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713 } |
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714 ShapeImpl newShape = top; |
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715 for (ListIterator<Transition> iterator = transitionList.listIterator(transitionList.size()); iterator.hasPrevious();) { |
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716 Transition transition = iterator.previous(); |
18626
ce46f909c176
OM: record replaceProperty transitions
Andreas Woess <andreas.woess@jku.at>
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717 if (transition instanceof AddPropertyTransition && ((AddPropertyTransition) transition).getProperty().getKey().equals(newProperty.getKey())) { |
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OM: record replaceProperty transitions
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|
718 newShape = newShape.addProperty(newProperty); |
18408
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719 } else { |
18623
8bf798e8cf11
OM: remember transition from parent and walk transitions instead of properties in replaceProperty,removeProperty
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|
720 newShape = newShape.applyTransition(transition, false); |
18408
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721 } |
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722 } |
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723 addIndirectTransition(replacePropertyTransition, newShape); |
18408
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724 return newShape; |
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725 } |
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726 |
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727 /** |
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728 * Find lowest common ancestor of two related shapes. |
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729 */ |
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730 public static ShapeImpl findCommonAncestor(ShapeImpl left, ShapeImpl right) { |
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731 if (!left.isRelated(right)) { |
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732 throw new IllegalArgumentException("shapes must have the same root"); |
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733 } else if (left == right) { |
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734 return left; |
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735 } |
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736 int leftLength = left.depth; |
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737 int rightLength = right.depth; |
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738 ShapeImpl leftPtr = left; |
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739 ShapeImpl rightPtr = right; |
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740 while (leftLength > rightLength) { |
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741 leftPtr = leftPtr.parent; |
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742 leftLength--; |
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743 } |
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744 while (rightLength > leftLength) { |
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745 rightPtr = rightPtr.parent; |
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746 rightLength--; |
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747 } |
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748 while (leftPtr != rightPtr) { |
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749 leftPtr = leftPtr.parent; |
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750 rightPtr = rightPtr.parent; |
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751 } |
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752 return leftPtr; |
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753 } |
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|
754 |
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|
755 /** |
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|
756 * For copying over properties after exchanging the prototype of an object. |
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757 */ |
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758 @TruffleBoundary |
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759 @Override |
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760 public final ShapeImpl copyOverPropertiesInternal(Shape destination) { |
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761 assert ((ShapeImpl) destination).getDepth() == 0; |
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762 List<Property> properties = this.getPropertyListInternal(true); |
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763 ShapeImpl newShape = ((ShapeImpl) destination).addPropertiesInternal(properties); |
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764 return newShape; |
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765 } |
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|
766 |
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767 private ShapeImpl addPropertiesInternal(List<Property> properties) { |
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768 ShapeImpl newShape = this; |
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769 for (Property p : properties) { |
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770 newShape = newShape.addPropertyInternal(p); |
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771 } |
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772 return newShape; |
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773 } |
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|
774 |
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775 @Override |
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776 public final int getPropertyCount() { |
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777 return propertyCount; |
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778 } |
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|
779 |
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780 /** |
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781 * Find difference between two shapes. |
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782 * |
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|
783 * @see ObjectStorageOptions#TraceReshape |
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784 */ |
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|
785 public static List<Property> diff(Shape oldShape, Shape newShape) { |
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|
786 List<Property> oldList = oldShape.getPropertyListInternal(false); |
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|
787 List<Property> newList = newShape.getPropertyListInternal(false); |
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|
788 |
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|
789 List<Property> diff = new ArrayList<>(oldList); |
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Truffle: initial commit of object API implementation
Andreas Woess <andreas.woess@jku.at>
parents:
diff
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|
790 diff.addAll(newList); |
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|
791 List<Property> intersection = new ArrayList<>(oldList); |
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|
792 intersection.retainAll(newList); |
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|
793 diff.removeAll(intersection); |
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parents:
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|
794 return diff; |
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|
795 } |
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|
796 |
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|
797 @Override |
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|
798 public ObjectType getObjectType() { |
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Andreas Woess <andreas.woess@jku.at>
parents:
diff
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|
799 return objectType; |
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parents:
diff
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|
800 } |
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|
801 |
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|
802 @Override |
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|
803 public ShapeImpl getRoot() { |
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parents:
diff
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|
804 return root; |
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diff
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|
805 } |
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|
806 |
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|
807 @Override |
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diff
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|
808 public final boolean check(DynamicObject subject) { |
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809 return subject.getShape() == this; |
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810 } |
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|
811 |
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812 @Override |
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813 public final LayoutImpl getLayout() { |
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814 return layout; |
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815 } |
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|
816 |
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817 @Override |
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818 public final Object getData() { |
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819 return extraData; |
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820 } |
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821 |
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822 @Override |
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823 public final Object getSharedData() { |
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824 return sharedData; |
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825 } |
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826 |
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827 @TruffleBoundary |
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828 @Override |
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829 public final boolean hasTransitionWithKey(Object key) { |
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parents:
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830 for (Transition transition : getTransitionMapForRead().keySet()) { |
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831 if (transition instanceof PropertyTransition) { |
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832 if (((PropertyTransition) transition).getProperty().getKey().equals(key)) { |
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833 return true; |
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834 } |
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835 } |
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836 } |
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837 return false; |
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838 } |
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839 |
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840 /** |
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841 * Clone off a separate shape with new shared data. |
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842 */ |
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843 @TruffleBoundary |
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844 @Override |
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845 public final ShapeImpl createSeparateShape(Object newSharedData) { |
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846 if (parent == null) { |
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847 return cloneRoot(this, newSharedData); |
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848 } else { |
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849 return this.cloneOnto(parent.createSeparateShape(newSharedData)); |
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850 } |
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851 } |
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852 |
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853 @Override |
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854 @TruffleBoundary |
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855 public final ShapeImpl changeType(ObjectType newOps) { |
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856 ObjectTypeTransition transition = new ObjectTypeTransition(newOps); |
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857 ShapeImpl cachedShape = queryTransition(transition); |
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858 if (cachedShape != null) { |
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859 return cachedShape; |
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860 } |
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861 |
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862 ShapeImpl newShape = createShape(layout, sharedData, this, newOps, propertyMap, transition, allocator(), id); |
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863 addDirectTransition(transition, newShape); |
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864 return newShape; |
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865 } |
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866 |
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867 @Override |
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868 public final ShapeImpl reservePrimitiveExtensionArray() { |
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869 if (layout.hasPrimitiveExtensionArray() && !hasPrimitiveArray()) { |
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870 return addPrimitiveExtensionArray(); |
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871 } |
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872 return this; |
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873 } |
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874 |
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875 @Override |
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876 public final Iterable<Property> getProperties() { |
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877 if (getPropertyCount() != 0 && propertyArray == null) { |
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878 CompilerDirectives.transferToInterpreter(); |
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879 propertyArray = createPropertiesArray(); |
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880 } |
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881 return new Iterable<Property>() { |
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882 public Iterator<Property> iterator() { |
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883 return new Iterator<Property>() { |
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884 private int cursor; |
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885 |
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886 public boolean hasNext() { |
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887 return cursor < getPropertyCount(); |
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888 } |
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889 |
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890 public Property next() { |
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891 if (hasNext()) { |
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892 return propertyArray[cursor++]; |
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893 } |
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894 throw new NoSuchElementException(); |
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895 } |
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896 |
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897 public void remove() { |
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898 throw new UnsupportedOperationException(); |
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899 } |
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900 }; |
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901 } |
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902 }; |
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903 } |
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904 |
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905 private Property[] createPropertiesArray() { |
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906 propertyListAllocCount.inc(); |
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907 Property[] propertiesArray = new Property[getPropertyCount()]; |
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908 List<Property> ownProperties = getPropertyList(); |
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909 assert ownProperties.size() == getPropertyCount(); |
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910 for (int i = 0; i < getPropertyCount(); i++) { |
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911 propertiesArray[i] = ownProperties.get(i); |
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912 } |
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913 return propertiesArray; |
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914 } |
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915 |
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916 @Override |
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917 public final DynamicObject newInstance() { |
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918 return layout.newInstance(this); |
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919 } |
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920 |
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921 @Override |
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922 public final DynamicObjectFactory createFactory() { |
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923 final List<Property> properties = getPropertyListInternal(true); |
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924 for (Iterator<Property> iterator = properties.iterator(); iterator.hasNext();) { |
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925 Property property = iterator.next(); |
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926 // skip non-instance fields |
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927 assert property.getLocation() != layout.getPrimitiveArrayLocation(); |
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928 if (property.getLocation() instanceof ValueLocation) { |
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929 iterator.remove(); |
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930 } |
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931 } |
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932 |
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933 return new DynamicObjectFactory() { |
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934 @CompilationFinal private final PropertyImpl[] instanceFields = properties.toArray(new PropertyImpl[properties.size()]); |
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935 |
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936 @ExplodeLoop |
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937 public DynamicObject newInstance(Object... initialValues) { |
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938 DynamicObject store = ShapeImpl.this.newInstance(); |
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939 for (int i = 0; i < instanceFields.length; i++) { |
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940 instanceFields[i].setInternal(store, initialValues[i]); |
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941 } |
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942 return store; |
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943 } |
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944 |
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945 public Shape getShape() { |
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946 return ShapeImpl.this; |
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947 } |
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948 }; |
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949 } |
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950 |
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951 @Override |
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952 public Object getMutex() { |
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953 return getRoot(); |
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954 } |
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955 |
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956 @Override |
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957 public Shape tryMerge(Shape other) { |
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958 return null; |
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959 } |
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960 |
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18747
diff
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961 public abstract static class BaseAllocator extends Allocator implements LocationVisitor { |
18408
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962 protected final LayoutImpl layout; |
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963 protected int objectArraySize; |
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964 protected int objectFieldSize; |
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965 protected int primitiveFieldSize; |
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966 protected int primitiveArraySize; |
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967 protected boolean hasPrimitiveArray; |
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968 protected int depth; |
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969 |
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970 protected BaseAllocator(LayoutImpl layout) { |
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971 this.layout = layout; |
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972 } |
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973 |
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974 protected BaseAllocator(ShapeImpl shape) { |
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975 this(shape.getLayout()); |
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976 this.objectArraySize = shape.objectArraySize; |
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977 this.objectFieldSize = shape.objectFieldSize; |
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978 this.primitiveFieldSize = shape.primitiveFieldSize; |
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979 this.primitiveArraySize = shape.primitiveArraySize; |
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980 this.hasPrimitiveArray = shape.hasPrimitiveArray; |
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981 this.depth = shape.depth; |
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982 } |
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983 |
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984 protected abstract Location moveLocation(Location oldLocation); |
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985 |
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986 protected abstract Location newObjectLocation(boolean useFinal, boolean nonNull); |
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987 |
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988 protected abstract Location newTypedObjectLocation(boolean useFinal, Class<?> type, boolean nonNull); |
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989 |
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990 protected abstract Location newIntLocation(boolean useFinal); |
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991 |
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992 protected abstract Location newDoubleLocation(boolean useFinal); |
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993 |
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994 protected abstract Location newLongLocation(boolean useFinal); |
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995 |
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996 protected abstract Location newBooleanLocation(boolean useFinal); |
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997 |
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998 @Override |
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999 public final Location constantLocation(Object value) { |
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1000 return new ConstantLocation(value); |
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1001 } |
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1002 |
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1003 @Override |
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1004 protected Location locationForValue(Object value, boolean useFinal, boolean nonNull) { |
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1005 if (value instanceof Integer) { |
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1006 return newIntLocation(useFinal); |
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1007 } else if (value instanceof Double) { |
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1008 return newDoubleLocation(useFinal); |
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1009 } else if (value instanceof Long) { |
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1010 return newLongLocation(useFinal); |
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1011 } else if (value instanceof Boolean) { |
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1012 return newBooleanLocation(useFinal); |
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1013 } else if (ObjectStorageOptions.TypedObjectLocations && value != null) { |
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1014 return newTypedObjectLocation(useFinal, value.getClass(), nonNull); |
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1015 } |
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1016 return newObjectLocation(useFinal, nonNull && value != null); |
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1017 } |
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1018 |
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1019 protected abstract Location locationForValueUpcast(Object value, Location oldLocation); |
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1020 |
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1021 @Override |
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1022 protected Location locationForType(Class<?> type, boolean useFinal, boolean nonNull) { |
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1023 if (type == int.class) { |
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1024 return newIntLocation(useFinal); |
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1025 } else if (type == double.class) { |
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1026 return newDoubleLocation(useFinal); |
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1027 } else if (type == long.class) { |
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1028 return newLongLocation(useFinal); |
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1029 } else if (type == boolean.class) { |
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1030 return newBooleanLocation(useFinal); |
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1031 } else if (ObjectStorageOptions.TypedObjectLocations && type != null && type != Object.class) { |
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1032 assert !type.isPrimitive() : "unsupported primitive type"; |
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1033 return newTypedObjectLocation(useFinal, type, nonNull); |
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1034 } |
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1035 return newObjectLocation(useFinal, nonNull); |
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1036 } |
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1037 |
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1038 protected Location newDualLocation(Class<?> type) { |
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1039 return new DualLocation((InternalLongLocation) newLongLocation(false), (ObjectLocation) newObjectLocation(false, false), layout, type); |
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1040 } |
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1041 |
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1042 protected DualLocation newDualLocationForValue(Object value) { |
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1043 Class<?> initialType = null; |
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1044 if (value instanceof Integer) { |
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1045 initialType = int.class; |
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1046 } else if (value instanceof Double) { |
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1047 initialType = double.class; |
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1048 } else if (value instanceof Boolean) { |
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1049 initialType = boolean.class; |
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1050 } else { |
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1051 initialType = Object.class; |
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1052 } |
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1053 return new DualLocation((InternalLongLocation) newLongLocation(false), (ObjectLocation) newObjectLocation(false, false), layout, initialType); |
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1054 } |
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1055 |
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1056 protected Location newDeclaredDualLocation(Object value) { |
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1057 return new DeclaredDualLocation((InternalLongLocation) newLongLocation(false), (ObjectLocation) newObjectLocation(false, false), value, layout); |
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1058 } |
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1059 |
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1060 protected <T extends Location> T advance(T location0) { |
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1061 if (location0 instanceof LocationImpl) { |
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1062 LocationImpl location = (LocationImpl) location0; |
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1063 if (location != layout.getPrimitiveArrayLocation()) { |
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1064 location.accept(this); |
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1065 } |
18408
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1066 if (layout.hasPrimitiveExtensionArray()) { |
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1067 hasPrimitiveArray |= location == layout.getPrimitiveArrayLocation() || primitiveArraySize > 0; |
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1068 } else { |
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1069 assert !hasPrimitiveArray && primitiveArraySize == 0; |
18408
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1070 } |
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1071 } |
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1072 depth++; |
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1073 return location0; |
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1074 } |
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1075 |
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1076 @Override |
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1077 public BaseAllocator addLocation(Location location) { |
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1078 advance(location); |
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1079 return this; |
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1080 } |
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1081 |
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1082 public void visitObjectField(int index, int count) { |
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1083 objectFieldSize = Math.max(objectFieldSize, index + count); |
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1084 } |
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1085 |
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1086 public void visitObjectArray(int index, int count) { |
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1087 objectArraySize = Math.max(objectArraySize, index + count); |
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1088 } |
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1089 |
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1090 public void visitPrimitiveArray(int index, int count) { |
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1091 primitiveArraySize = Math.max(primitiveArraySize, index + count); |
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1092 } |
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1093 |
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1094 public void visitPrimitiveField(int index, int count) { |
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1095 primitiveFieldSize = Math.max(primitiveFieldSize, index + count); |
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1096 } |
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1097 } |
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1098 |
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1099 private static void debugRegisterShape(ShapeImpl newShape) { |
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1100 if (ObjectStorageOptions.DumpShapes) { |
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1101 Debug.registerShape(newShape); |
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1102 } |
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1103 } |
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1104 |
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1105 /** |
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1106 * Match all filter. |
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1107 */ |
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1108 private static final Pred<Property> ALL = new Pred<Property>() { |
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1109 public boolean test(Property t) { |
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1110 return true; |
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1111 } |
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1112 }; |
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1113 |
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1114 private static final DebugCounter shapeCount = DebugCounter.create("Shapes allocated total"); |
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1115 private static final DebugCounter shapeCloneCount = DebugCounter.create("Shapes allocated cloned"); |
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1116 private static final DebugCounter shapeCacheHitCount = DebugCounter.create("Shape cache hits"); |
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1117 private static final DebugCounter shapeCacheMissCount = DebugCounter.create("Shape cache misses"); |
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1118 |
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1119 protected static final DebugCounter propertyListAllocCount = DebugCounter.create("Property lists allocated"); |
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1120 protected static final DebugCounter propertyListShareCount = DebugCounter.create("Property lists shared"); |
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1121 |
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1122 public ForeignAccess getForeignAccessFactory() { |
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1123 return getObjectType().getForeignAccessFactory(); |
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1124 } |
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1125 } |