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annotate truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/ReturnTypeSpecializationTest.java @ 22241:14e6dfb1ef05

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Truffle/Testing: massive rework of tests to accommodate recent instrumentation change with respect to "applyInstrumentation" - Caused by lack of a "vm" known to the Accessor during most testing, making the Instrumenter unavailable, which is now required to create a CallTarget - Modified the Instrumenter/Accessor with a static field that can be reflectively "poked" with a vm value for testing - Create a pair of methods to globally enable/disable testing mode to modify that static field and restore it when tests complete.
author Michael Van De Vanter <michael.van.de.vanter@oracle.com>
date Tue, 22 Sep 2015 20:31:19 -0700
parents dc83cc1f94f2
children 0d36601f233e
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1 /*
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2 * Copyright (c) 2012, 2013, 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
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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12 * version 2 for more details (a copy is included in the LICENSE file that
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 * 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.api.test;
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24
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25 import com.oracle.truffle.api.CallTarget;
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26 import com.oracle.truffle.api.Truffle;
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27 import com.oracle.truffle.api.TruffleRuntime;
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28 import com.oracle.truffle.api.frame.FrameDescriptor;
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29 import com.oracle.truffle.api.frame.FrameSlot;
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30 import com.oracle.truffle.api.frame.FrameSlotKind;
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31 import com.oracle.truffle.api.frame.FrameSlotTypeException;
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32 import com.oracle.truffle.api.frame.VirtualFrame;
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33 import com.oracle.truffle.api.nodes.Node;
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34 import com.oracle.truffle.api.nodes.RootNode;
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35 import com.oracle.truffle.api.nodes.UnexpectedResultException;
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36 import com.oracle.truffle.api.test.utilities.InstrumentationTestMode;
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37
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38 import org.junit.After;
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39 import org.junit.Assert;
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40 import org.junit.Before;
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41 import org.junit.Test;
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42
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43 /**
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44 * <h3>Specializing Return Types</h3>
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45 *
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46 * <p>
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47 * In order to avoid boxing and/or type casts on the return value of a node, the return value the
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48 * method for executing a node can have a specific type and need not be of type
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49 * {@link java.lang.Object}. For dynamically typed languages, this return type is something that
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50 * should be speculated on. When the speculation fails and the child node cannot return the
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51 * appropriate type of value, it can use an {@link UnexpectedResultException} to still pass the
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52 * result to the caller. In such a case, the caller must rewrite itself to a more general version in
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53 * order to avoid future failures of this kind.
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54 * </p>
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55 */
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56 public class ReturnTypeSpecializationTest {
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57
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58 @Before
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59 public void before() throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
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60 InstrumentationTestMode.set(true);
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61 }
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63 @After
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64 public void after() throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
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65 InstrumentationTestMode.set(false);
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66 }
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67
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68 @Test
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69 public void test() {
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70 TruffleRuntime runtime = Truffle.getRuntime();
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71 FrameDescriptor frameDescriptor = new FrameDescriptor();
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72 FrameSlot slot = frameDescriptor.addFrameSlot("localVar", FrameSlotKind.Int);
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73 TestRootNode rootNode = new TestRootNode(frameDescriptor, new IntAssignLocal(slot, new StringTestChildNode()), new IntReadLocal(slot));
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74 CallTarget target = runtime.createCallTarget(rootNode);
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75 Assert.assertEquals(FrameSlotKind.Int, slot.getKind());
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76 Object result = target.call();
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77 Assert.assertEquals("42", result);
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78 Assert.assertEquals(FrameSlotKind.Object, slot.getKind());
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79 }
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81 class TestRootNode extends RootNode {
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83 @Child TestChildNode left;
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84 @Child TestChildNode right;
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85
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86 public TestRootNode(FrameDescriptor descriptor, TestChildNode left, TestChildNode right) {
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87 super(TestingLanguage.class, null, descriptor);
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88 this.left = left;
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89 this.right = right;
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90 }
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91
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92 @Override
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93 public Object execute(VirtualFrame frame) {
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94 left.execute(frame);
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95 return right.execute(frame);
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96 }
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97 }
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98
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99 abstract class TestChildNode extends Node {
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100
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101 public TestChildNode() {
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102 super(null);
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103 }
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104
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105 abstract Object execute(VirtualFrame frame);
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106
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107 int executeInt(VirtualFrame frame) throws UnexpectedResultException {
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108 Object result = execute(frame);
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109 if (result instanceof Integer) {
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110 return (Integer) result;
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111 }
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112 throw new UnexpectedResultException(result);
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113 }
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114 }
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115
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116 abstract class FrameSlotNode extends TestChildNode {
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117
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118 protected final FrameSlot slot;
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119
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120 public FrameSlotNode(FrameSlot slot) {
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121 this.slot = slot;
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122 }
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123 }
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124
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125 class StringTestChildNode extends TestChildNode {
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126
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127 @Override
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128 Object execute(VirtualFrame frame) {
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129 return "42";
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130 }
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131
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132 }
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133
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134 class IntAssignLocal extends FrameSlotNode {
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135
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136 @Child private TestChildNode value;
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137
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138 IntAssignLocal(FrameSlot slot, TestChildNode value) {
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139 super(slot);
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140 this.value = value;
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141 }
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142
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143 @Override
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144 Object execute(VirtualFrame frame) {
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145 try {
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146 int result = value.executeInt(frame);
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147 frame.setInt(slot, result);
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148 } catch (UnexpectedResultException e) {
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149 slot.setKind(FrameSlotKind.Object);
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150 frame.setObject(slot, e.getResult());
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151 replace(new ObjectAssignLocal(slot, value));
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152 }
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153 return null;
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154 }
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155 }
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156
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157 class ObjectAssignLocal extends FrameSlotNode {
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158
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159 @Child private TestChildNode value;
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160
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161 ObjectAssignLocal(FrameSlot slot, TestChildNode value) {
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162 super(slot);
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163 this.value = value;
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164 }
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165
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166 @Override
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167 Object execute(VirtualFrame frame) {
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168 Object o = value.execute(frame);
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169 slot.setKind(FrameSlotKind.Object);
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170 frame.setObject(slot, o);
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171 return null;
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172 }
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173 }
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174
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175 class IntReadLocal extends FrameSlotNode {
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176
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177 IntReadLocal(FrameSlot slot) {
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178 super(slot);
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179 }
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180
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181 @Override
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182 Object execute(VirtualFrame frame) {
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183 try {
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184 return frame.getInt(slot);
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185 } catch (FrameSlotTypeException e) {
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186 return replace(new ObjectReadLocal(slot)).execute(frame);
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187 }
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188 }
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189
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190 @Override
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191 int executeInt(VirtualFrame frame) throws UnexpectedResultException {
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192 try {
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193 return frame.getInt(slot);
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194 } catch (FrameSlotTypeException e) {
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195 return replace(new ObjectReadLocal(slot)).executeInt(frame);
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196 }
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197 }
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198 }
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199
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200 class ObjectReadLocal extends FrameSlotNode {
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201
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202 ObjectReadLocal(FrameSlot slot) {
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203 super(slot);
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204 }
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205
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206 @Override
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207 Object execute(VirtualFrame frame) {
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208 try {
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209 return frame.getObject(slot);
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210 } catch (FrameSlotTypeException e) {
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211 throw new IllegalStateException(e);
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212 }
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213 }
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214 }
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215 }