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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/frame/FrameDescriptor.java @ 18161:94f16a759646

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Truffle: remove FrameTypeConversion interface
author Andreas Woess <andreas.woess@jku.at>
date Thu, 23 Oct 2014 13:45:59 +0200
parents 9d55732d0880
children 79d212bfee22
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a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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1 /*
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2 * Copyright (c) 2012, 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. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.frame;
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27 import java.util.*;
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28
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29 import com.oracle.truffle.api.*;
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31 /**
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32 * Descriptor of the slots of frame objects. Multiple frame instances are associated with one such
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33 * descriptor.
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34 */
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35 public final class FrameDescriptor implements Cloneable {
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36
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37 private final Object defaultValue;
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38 private final ArrayList<FrameSlot> slots;
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39 private final HashMap<Object, FrameSlot> identifierToSlotMap;
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40 private Assumption version;
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41 private HashMap<Object, Assumption> identifierToNotInFrameAssumptionMap;
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42
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43 public FrameDescriptor() {
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44 this(null);
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45 }
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46
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47 public FrameDescriptor(Object defaultValue) {
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48 this.defaultValue = defaultValue;
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49 slots = new ArrayList<>();
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50 identifierToSlotMap = new HashMap<>();
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51 version = createVersion();
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52 }
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53
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54 public static FrameDescriptor create() {
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55 return new FrameDescriptor();
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56 }
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57
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58 public static FrameDescriptor create(Object defaultValue) {
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59 return new FrameDescriptor(defaultValue);
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60 }
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61
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62 public FrameSlot addFrameSlot(Object identifier) {
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63 return addFrameSlot(identifier, null, FrameSlotKind.Illegal);
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64 }
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65
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66 public FrameSlot addFrameSlot(Object identifier, FrameSlotKind kind) {
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67 return addFrameSlot(identifier, null, kind);
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68 }
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69
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70 public FrameSlot addFrameSlot(Object identifier, Object info, FrameSlotKind kind) {
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71 CompilerAsserts.neverPartOfCompilation("interpreter-only. includes hashmap operations.");
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72 assert !identifierToSlotMap.containsKey(identifier);
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73 FrameSlot slot = new FrameSlot(this, identifier, info, slots.size(), kind);
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74 slots.add(slot);
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75 identifierToSlotMap.put(identifier, slot);
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76 updateVersion();
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77 invalidateNotInFrameAssumption(identifier);
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78 return slot;
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79 }
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80
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81 public FrameSlot findFrameSlot(Object identifier) {
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82 return identifierToSlotMap.get(identifier);
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83 }
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84
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85 public FrameSlot findOrAddFrameSlot(Object identifier) {
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86 FrameSlot result = findFrameSlot(identifier);
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87 if (result != null) {
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88 return result;
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89 }
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90 return addFrameSlot(identifier);
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91 }
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92
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93 public FrameSlot findOrAddFrameSlot(Object identifier, FrameSlotKind kind) {
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94 FrameSlot result = findFrameSlot(identifier);
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95 if (result != null) {
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96 return result;
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97 }
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98 return addFrameSlot(identifier, kind);
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99 }
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100
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101 public FrameSlot findOrAddFrameSlot(Object identifier, Object info, FrameSlotKind kind) {
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102 FrameSlot result = findFrameSlot(identifier);
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103 if (result != null) {
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104 return result;
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105 }
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106 return addFrameSlot(identifier, info, kind);
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107 }
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108
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109 public void removeFrameSlot(Object identifier) {
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110 CompilerAsserts.neverPartOfCompilation("interpreter-only. includes hashmap operations.");
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111 assert identifierToSlotMap.containsKey(identifier);
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112 slots.remove(identifierToSlotMap.get(identifier));
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113 identifierToSlotMap.remove(identifier);
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114 updateVersion();
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115 getNotInFrameAssumption(identifier);
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116 }
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117
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118 public int getSize() {
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119 return slots.size();
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120 }
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121
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122 public List<? extends FrameSlot> getSlots() {
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123 return Collections.unmodifiableList(slots);
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124 }
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125
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126 /**
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127 * Retrieve the list of all the identifiers associated with this frame descriptor.
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128 *
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129 * @return the list of all the identifiers in this frame descriptor
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130 */
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131 public Set<Object> getIdentifiers() {
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132 return Collections.unmodifiableSet(identifierToSlotMap.keySet());
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133 }
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134
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135 public FrameDescriptor copy() {
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136 FrameDescriptor clonedFrameDescriptor = new FrameDescriptor(this.defaultValue);
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137 for (int i = 0; i < this.getSlots().size(); i++) {
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138 Object identifier = this.getSlots().get(i).getIdentifier();
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139 clonedFrameDescriptor.addFrameSlot(identifier);
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140 }
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141 return clonedFrameDescriptor;
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142 }
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143
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144 public FrameDescriptor shallowCopy() {
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145 FrameDescriptor clonedFrameDescriptor = new FrameDescriptor(this.defaultValue);
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146 clonedFrameDescriptor.slots.addAll(slots);
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147 clonedFrameDescriptor.identifierToSlotMap.putAll(identifierToSlotMap);
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148 return clonedFrameDescriptor;
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149 }
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150
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151 void updateVersion() {
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152 version.invalidate();
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153 version = createVersion();
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154 }
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155
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156 public Assumption getVersion() {
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157 return version;
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158 }
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159
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160 private static Assumption createVersion() {
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161 return Truffle.getRuntime().createAssumption("frame version");
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162 }
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163
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164 public Object getDefaultValue() {
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165 return defaultValue;
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166 }
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167
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168 public Assumption getNotInFrameAssumption(Object identifier) {
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169 if (identifierToSlotMap.containsKey(identifier)) {
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170 throw new IllegalArgumentException("Cannot get not-in-frame assumption for existing frame slot!");
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171 }
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172
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173 if (identifierToNotInFrameAssumptionMap == null) {
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174 identifierToNotInFrameAssumptionMap = new HashMap<>();
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175 } else {
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176 Assumption assumption = identifierToNotInFrameAssumptionMap.get(identifier);
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177 if (assumption != null) {
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178 return assumption;
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179 }
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180 }
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181 Assumption assumption = Truffle.getRuntime().createAssumption("not in frame: " + identifier);
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182 identifierToNotInFrameAssumptionMap.put(identifier, assumption);
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183 return assumption;
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184 }
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185
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186 private void invalidateNotInFrameAssumption(Object identifier) {
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187 if (identifierToNotInFrameAssumptionMap != null) {
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188 Assumption assumption = identifierToNotInFrameAssumptionMap.get(identifier);
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189 if (assumption != null) {
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190 assumption.invalidate();
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191 identifierToNotInFrameAssumptionMap.remove(identifier);
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192 }
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193 }
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194 }
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195 }