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annotate graal/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/FrameSlotTypeSpecializationTest.java @ 11858:cdff87c89c5f

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author Lukas Stadler <lukas.stadler@jku.at>
date Wed, 02 Oct 2013 13:28:17 +0200
parents 269e6794e1ec
children df1d665ca846
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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.
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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.api.test;
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25 import org.junit.*;
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27 import com.oracle.truffle.api.*;
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28 import com.oracle.truffle.api.frame.*;
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29 import com.oracle.truffle.api.nodes.*;
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31 /**
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32 * <h3>Specializing Frame Slot Types</h3>
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33 *
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34 * <p>
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35 * Dynamically typed languages can speculate on the type of a frame slot and only fall back at run
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36 * time to a more generic type if necessary. The new type of a frame slot can be set using the
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37 * {@link FrameSlot#setKind(FrameSlotKind)} method.
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38 * </p>
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39 *
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40 * <p>
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41 * The next part of the Truffle API introduction is at
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42 * {@link com.oracle.truffle.api.test.ReturnTypeSpecializationTest}.
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43 * </p>
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44 */
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45 public class FrameSlotTypeSpecializationTest {
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46
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47 @Test
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48 public void test() {
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49 TruffleRuntime runtime = Truffle.getRuntime();
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50 FrameDescriptor frameDescriptor = new FrameDescriptor();
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51 FrameSlot slot = frameDescriptor.addFrameSlot("localVar", FrameSlotKind.Int);
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52 TestRootNode rootNode = new TestRootNode(new IntAssignLocal(slot, new StringTestChildNode()), new IntReadLocal(slot));
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53 CallTarget target = runtime.createCallTarget(rootNode, frameDescriptor);
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54 Assert.assertEquals(FrameSlotKind.Int, slot.getKind());
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55 Object result = target.call();
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56 Assert.assertEquals("42", result);
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57 Assert.assertEquals(FrameSlotKind.Object, slot.getKind());
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58 }
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60 class TestRootNode extends RootNode {
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62 @Child TestChildNode left;
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63 @Child TestChildNode right;
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65 public TestRootNode(TestChildNode left, TestChildNode right) {
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66 this.left = adoptChild(left);
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67 this.right = adoptChild(right);
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68 }
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70 @Override
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71 public Object execute(VirtualFrame frame) {
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72 left.execute(frame);
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73 return right.execute(frame);
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74 }
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75 }
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77 abstract class TestChildNode extends Node {
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78
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79 abstract Object execute(VirtualFrame frame);
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80 }
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81
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82 abstract class FrameSlotNode extends TestChildNode {
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83
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84 protected final FrameSlot slot;
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85
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86 public FrameSlotNode(FrameSlot slot) {
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87 this.slot = slot;
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88 }
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89 }
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90
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91 class StringTestChildNode extends TestChildNode {
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92
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93 @Override
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94 Object execute(VirtualFrame frame) {
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95 return "42";
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96 }
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97
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98 }
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99
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100 class IntAssignLocal extends FrameSlotNode {
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101
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102 @Child private TestChildNode value;
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103
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104 IntAssignLocal(FrameSlot slot, TestChildNode value) {
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105 super(slot);
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106 this.value = adoptChild(value);
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107 }
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108
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109 @Override
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110 Object execute(VirtualFrame frame) {
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111 Object o = value.execute(frame);
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112 if (o instanceof Integer) {
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113 try {
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114 frame.setInt(slot, (Integer) o);
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115 } catch (FrameSlotTypeException e) {
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116 // fall through
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117 }
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118 }
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119 frame.setObject(slot, o);
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120 this.replace(new ObjectAssignLocal(slot, value));
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121 return null;
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122 }
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123 }
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124
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125 class ObjectAssignLocal extends FrameSlotNode {
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126
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127 @Child private TestChildNode value;
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128
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129 ObjectAssignLocal(FrameSlot slot, TestChildNode value) {
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130 super(slot);
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131 this.value = adoptChild(value);
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132 }
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133
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134 @Override
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135 Object execute(VirtualFrame frame) {
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136 Object o = value.execute(frame);
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137 frame.setObject(slot, o);
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138 return null;
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139 }
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140 }
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141
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142 class IntReadLocal extends FrameSlotNode {
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143
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144 IntReadLocal(FrameSlot slot) {
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145 super(slot);
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146 }
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147
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148 @Override
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149 Object execute(VirtualFrame frame) {
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150 try {
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151 return frame.getInt(slot);
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152 } catch (FrameSlotTypeException e) {
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153 return this.replace(new ObjectReadLocal(slot)).execute(frame);
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154 }
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155 }
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156 }
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157
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158 class ObjectReadLocal extends FrameSlotNode {
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159
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160 ObjectReadLocal(FrameSlot slot) {
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161 super(slot);
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162 }
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163
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164 @Override
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165 Object execute(VirtualFrame frame) {
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166 try {
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167 return frame.getObject(slot);
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168 } catch (FrameSlotTypeException e) {
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169 throw new IllegalStateException(e);
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170 }
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171 }
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172 }
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173 }