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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/ObjectCloneSnippets.java @ 11839:0e2cceed1caf

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Temporarily move encodeDeoptActionAndReason to MetaAccessProvider Add AbstractDeoptimizeNode.getActionAndReason
author Gilles Duboscq <duboscq@ssw.jku.at>
date Mon, 30 Sep 2013 16:09:40 +0200
parents 8db5e8c4f542
children 69a527047c40
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2011, 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.graal.hotspot.replacements;
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24
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25 import static com.oracle.graal.api.meta.LocationIdentity.*;
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26 import static com.oracle.graal.hotspot.replacements.HotSpotReplacementsUtil.*;
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27 import static com.oracle.graal.nodes.extended.BranchProbabilityNode.*;
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28 import static com.oracle.graal.phases.GraalOptions.*;
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29
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30 import java.lang.reflect.*;
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31
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32 import com.oracle.graal.api.meta.*;
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33 import com.oracle.graal.graph.*;
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34 import com.oracle.graal.nodes.*;
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35 import com.oracle.graal.nodes.java.*;
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36 import com.oracle.graal.replacements.*;
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37 import com.oracle.graal.word.*;
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38
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39 public class ObjectCloneSnippets implements Snippets {
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40
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41 public static final Method instanceCloneMethod = getCloneMethod("instanceClone");
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42 public static final Method arrayCloneMethod = getCloneMethod("arrayClone");
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43 public static final Method genericCloneMethod = getCloneMethod("genericClone");
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44
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45 private static Method getCloneMethod(String name) {
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46 try {
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47 return ObjectCloneSnippets.class.getDeclaredMethod(name, Object.class);
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48 } catch (SecurityException | NoSuchMethodException e) {
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49 throw new GraalInternalError(e);
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50 }
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51 }
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52
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53 private static Object instanceClone(Object src, Word hub, int layoutHelper) {
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54 int instanceSize = layoutHelper;
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55 Word prototypeMarkWord = hub.readWord(prototypeMarkWordOffset(), PROTOTYPE_MARK_WORD_LOCATION);
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56 Object result = NewObjectSnippets.allocateInstance(instanceSize, hub, prototypeMarkWord, false);
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57
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58 for (int offset = instanceHeaderSize(); offset < instanceSize; offset += wordSize()) {
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59 /*
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60 * TODO atomicity problem on 32-bit architectures: The JVM spec requires double values
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61 * to be copied atomically, but here they are copied as two 4-byte word values.
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62 */
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63 ObjectAccess.writeWord(result, offset, ObjectAccess.readWord(src, offset, ANY_LOCATION), ANY_LOCATION);
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64 }
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65
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66 return result;
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67 }
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68
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69 private static Object arrayClone(Object src, Word hub, int layoutHelper) {
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70 int arrayLength = ArrayLengthNode.arrayLength(src);
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71 int log2ElementSize = (layoutHelper >> layoutHelperLog2ElementSizeShift()) & layoutHelperLog2ElementSizeMask();
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72 int headerSize = (layoutHelper >> layoutHelperHeaderSizeShift()) & layoutHelperHeaderSizeMask();
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73 int sizeInBytes = NewObjectSnippets.computeArrayAllocationSize(arrayLength, wordSize(), headerSize, log2ElementSize);
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74
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75 Word prototypeMarkWord = hub.readWord(prototypeMarkWordOffset(), PROTOTYPE_MARK_WORD_LOCATION);
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76 Object result = NewObjectSnippets.allocateArray(hub, arrayLength, prototypeMarkWord, headerSize, log2ElementSize, false);
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77
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78 for (int offset = headerSize; offset < sizeInBytes; offset += wordSize()) {
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79 /*
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80 * TODO atomicity problem on 32-bit architectures: The JVM spec requires double values
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81 * to be copied atomically, but here they are copied as two 4-byte word values.
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82 */
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83 ObjectAccess.writeWord(result, offset, ObjectAccess.readWord(src, offset, ANY_LOCATION), ANY_LOCATION);
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84 }
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85 return result;
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86 }
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87
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88 private static Word getAndCheckHub(Object src) {
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89 Word hub = loadHub(src);
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90 if (!(src instanceof Cloneable)) {
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91 DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.RuntimeConstraint);
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92 }
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93 return hub;
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94 }
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95
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96 @Snippet
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97 public static Object instanceClone(Object src) {
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98 instanceCloneCounter.inc();
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99 Word hub = getAndCheckHub(src);
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100 return instanceClone(src, hub, hub.readInt(layoutHelperOffset(), FINAL_LOCATION));
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101 }
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102
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103 @Snippet
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104 public static Object arrayClone(Object src) {
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105 arrayCloneCounter.inc();
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106 Word hub = getAndCheckHub(src);
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107 int layoutHelper = hub.readInt(layoutHelperOffset(), FINAL_LOCATION);
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108 return arrayClone(src, hub, layoutHelper);
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109 }
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110
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111 @Snippet
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112 public static Object genericClone(Object src) {
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113 genericCloneCounter.inc();
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114 Word hub = getAndCheckHub(src);
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115 int layoutHelper = hub.readInt(layoutHelperOffset(), FINAL_LOCATION);
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116 if (probability(LIKELY_PROBABILITY, layoutHelper < 0)) {
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117 genericArrayCloneCounter.inc();
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118 return arrayClone(src, hub, layoutHelper);
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119 } else {
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120 genericInstanceCloneCounter.inc();
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121 return instanceClone(src, hub, layoutHelper);
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122 }
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123 }
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124
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125 private static final SnippetCounter.Group cloneCounters = SnippetCounters.getValue() ? new SnippetCounter.Group("Object.clone") : null;
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Lukas Stadler <lukas.stadler@jku.at>
parents:
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126 private static final SnippetCounter instanceCloneCounter = new SnippetCounter(cloneCounters, "instanceClone", "clone snippet for instances");
cff55cdeea48 implement Object.clone snippets and macro node
Lukas Stadler <lukas.stadler@jku.at>
parents:
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127 private static final SnippetCounter arrayCloneCounter = new SnippetCounter(cloneCounters, "arrayClone", "clone snippet for arrays");
cff55cdeea48 implement Object.clone snippets and macro node
Lukas Stadler <lukas.stadler@jku.at>
parents:
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128 private static final SnippetCounter genericCloneCounter = new SnippetCounter(cloneCounters, "genericClone", "clone snippet for arrays and instances");
cff55cdeea48 implement Object.clone snippets and macro node
Lukas Stadler <lukas.stadler@jku.at>
parents:
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129
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Doug Simon <doug.simon@oracle.com>
parents: 9793
diff changeset
130 private static final SnippetCounter.Group genericCloneCounters = SnippetCounters.getValue() ? new SnippetCounter.Group("Object.clone generic snippet") : null;
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cff55cdeea48 implement Object.clone snippets and macro node
Lukas Stadler <lukas.stadler@jku.at>
parents:
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131 private static final SnippetCounter genericInstanceCloneCounter = new SnippetCounter(genericCloneCounters, "genericInstanceClone", "generic clone implementation took instance path");
cff55cdeea48 implement Object.clone snippets and macro node
Lukas Stadler <lukas.stadler@jku.at>
parents:
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132 private static final SnippetCounter genericArrayCloneCounter = new SnippetCounter(genericCloneCounters, "genericArrayClone", "generic clone implementation took array path");
cff55cdeea48 implement Object.clone snippets and macro node
Lukas Stadler <lukas.stadler@jku.at>
parents:
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133
cff55cdeea48 implement Object.clone snippets and macro node
Lukas Stadler <lukas.stadler@jku.at>
parents:
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134 }