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annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiVirtualObject.java @ 5507:dc71b06d09f8

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Moving classes from cri.ri to api.meta.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Thu, 07 Jun 2012 18:24:06 +0200
parents 56860d3f9f39
children
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1 /*
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2 * Copyright (c) 2010, 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.max.cri.ci;
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24
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25 import com.oracle.graal.api.meta.*;
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26 import com.oracle.max.cri.ri.*;
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27
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28 /**
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29 * An instance of this class represents an object whose allocation was removed by escape analysis. The information stored in the {@link CiVirtualObject} is used during
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30 * deoptimization to recreate the object.
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31 */
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32 public final class CiVirtualObject extends RiValue {
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33 private static final long serialVersionUID = -2907197776426346021L;
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34
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35 private final RiType type;
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36 private RiValue[] values;
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37 private final int id;
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38
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39 /**
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40 * Creates a new CiVirtualObject for the given type, with the given fields. If the type is an instance class then the values array needs to have one entry for each field, ordered in
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41 * like the fields returned by {@link RiResolvedType#declaredFields()}. If the type is an array then the length of the values array determines the reallocated array length.
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42 * @param type the type of the object whose allocation was removed during compilation. This can be either an instance of an array type.
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43 * @param values an array containing all the values to be stored into the object when it is recreated.
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44 * @param id a unique id that identifies the object within the debug information for one position in the compiled code.
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45 * @return a new CiVirtualObject instance.
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46 */
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47 public static CiVirtualObject get(RiType type, RiValue[] values, int id) {
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48 return new CiVirtualObject(type, values, id);
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49 }
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50
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51 private CiVirtualObject(RiType type, RiValue[] values, int id) {
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52 super(RiKind.Object);
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53 this.type = type;
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54 this.values = values;
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55 this.id = id;
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56 }
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57
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58 @Override
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59 public String toString() {
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60 return "vobject:" + id;
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61 }
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62
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63 /**
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64 * @return the type of the object whose allocation was removed during compilation. This can be either an instance of an array type.
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65 */
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66 public RiType type() {
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67 return type;
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68 }
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69
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70 /**
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71 * @return an array containing all the values to be stored into the object when it is recreated.
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72 */
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73 public RiValue[] values() {
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74 return values;
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75 }
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76
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77 /**
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78 * @return the unique id that identifies the object within the debug information for one position in the compiled code.
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79 */
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80 public int id() {
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81 return id;
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82 }
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83
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84 /**
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85 * Overwrites the current set of values with a new one.
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86 * @param values an array containing all the values to be stored into the object when it is recreated.
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87 */
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88 public void setValues(RiValue[] values) {
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89 this.values = values;
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90 }
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91
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92 @Override
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93 public int hashCode() {
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94 return kind.ordinal() + type.hashCode();
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95 }
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96
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97 @Override
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98 public boolean equals(Object o) {
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99 if (o == this) {
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100 return true;
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101 }
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102 if (o instanceof CiVirtualObject) {
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103 CiVirtualObject l = (CiVirtualObject) o;
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104 if (l.type != type || l.values.length != values.length) {
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105 return false;
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106 }
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107 for (int i = 0; i < values.length; i++) {
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108 if (values[i] != l.values[i]) {
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109 return false;
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110 }
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111 }
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112 return true;
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113 }
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114 return false;
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115 }
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116
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117 /**
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118 * This is a helper class used to create virtual objects for a number of different JDK classes.
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119 */
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120 public static class CiVirtualObjectFactory {
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121 private int nextId = 0;
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122 private final RiRuntime runtime;
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123
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124 public CiVirtualObjectFactory(RiRuntime runtime) {
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125 this.runtime = runtime;
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126 }
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127
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128 public CiVirtualObject constantProxy(RiKind kind, RiValue objectValue, RiValue primitiveValue) {
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129 RiConstant cKind = RiConstant.forObject(kind);
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130 // TODO: here the ordering is hard coded... we should query RiType.fields() and act accordingly
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131 return new CiVirtualObject(runtime.getType(RiConstant.class), new RiValue[] {cKind, primitiveValue, RiValue.IllegalValue, objectValue}, nextId++);
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132 }
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133
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134 public RiValue proxy(RiValue ciValue) {
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135 switch (ciValue.kind) {
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136 case Boolean:
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137 return new CiVirtualObject(runtime.getType(Boolean.class), new RiValue[] {ciValue}, nextId++);
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138 case Byte:
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139 return new CiVirtualObject(runtime.getType(Byte.class), new RiValue[] {ciValue}, nextId++);
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140 case Char:
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141 return new CiVirtualObject(runtime.getType(Character.class), new RiValue[] {ciValue}, nextId++);
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142 case Double:
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143 return new CiVirtualObject(runtime.getType(Double.class), new RiValue[] {ciValue, RiValue.IllegalValue}, nextId++);
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144 case Float:
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145 return new CiVirtualObject(runtime.getType(Float.class), new RiValue[] {ciValue}, nextId++);
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146 case Int:
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147 return new CiVirtualObject(runtime.getType(Integer.class), new RiValue[] {ciValue}, nextId++);
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148 case Long:
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149 return new CiVirtualObject(runtime.getType(Long.class), new RiValue[] {ciValue, RiValue.IllegalValue}, nextId++);
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150 case Object:
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151 return ciValue;
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152 case Short:
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153 return new CiVirtualObject(runtime.getType(Short.class), new RiValue[] {ciValue}, nextId++);
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154 default:
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155 assert false : ciValue.kind;
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156 return null;
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157 }
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158 }
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159
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160 public CiVirtualObject arrayProxy(RiType arrayType, RiValue[] values) {
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161 return new CiVirtualObject(arrayType, values, nextId++);
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162 }
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163
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164 }
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165 }