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annotate graal/com.oracle.max.cri/src/com/sun/cri/ci/CiVirtualObject.java @ 4169:f5328dda9714

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Initial commit of SSA-based spill-all register assignment
author Christian Wimmer <Christian.Wimmer@Oracle.com>
date Wed, 28 Dec 2011 18:13:25 -0800
parents bc8527f3071c
children de7b3e7ae528
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1 /*
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2 * Copyright (c) 2010, 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.sun.cri.ci;
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24
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25 import com.sun.cri.ri.*;
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26
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27 /**
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28 * 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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29 * deoptimization to recreate the object.
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30 */
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31 public final class CiVirtualObject extends CiValue {
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32 private static final long serialVersionUID = -2907197776426346021L;
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33
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34 private final RiType type;
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35 private CiValue[] values;
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36 private final int id;
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37
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38 /**
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39 * 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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40 * 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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41 * @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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42 * @param values an array containing all the values to be stored into the object when it is recreated.
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43 * @param id a unique id that identifies the object within the debug information for one position in the compiled code.
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44 * @return a new CiVirtualObject instance.
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45 */
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46 public static CiVirtualObject get(RiType type, CiValue[] values, int id) {
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47 return new CiVirtualObject(type, values, id);
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48 }
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49
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50 private CiVirtualObject(RiType type, CiValue[] values, int id) {
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51 super(CiKind.Object);
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52 this.type = type;
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53 this.values = values;
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54 this.id = id;
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55 }
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56
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57 @Override
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58 public String toString() {
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59 return "vobject:" + id;
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60 }
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61
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62 /**
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63 * @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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64 */
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65 public RiType type() {
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66 return type;
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67 }
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68
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69 /**
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70 * @return an array containing all the values to be stored into the object when it is recreated.
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71 */
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72 public CiValue[] values() {
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73 return values;
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74 }
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75
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76 /**
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77 * @return the unique id that identifies the object within the debug information for one position in the compiled code.
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78 */
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79 public int id() {
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80 return id;
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81 }
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82
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83 /**
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84 * Overwrites the current set of values with a new one.
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85 * @param values an array containing all the values to be stored into the object when it is recreated.
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86 */
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87 public void setValues(CiValue[] values) {
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88 this.values = values;
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89 }
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90
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91 @Override
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92 public int hashCode() {
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93 return kind.ordinal() + type.hashCode();
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94 }
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95
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96 @Override
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97 public boolean equals(Object o) {
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98 if (o == this) {
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99 return true;
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100 }
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101 if (o instanceof CiVirtualObject) {
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102 CiVirtualObject l = (CiVirtualObject) o;
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103 if (l.type != type || l.values.length != values.length) {
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104 return false;
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105 }
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106 for (int i = 0; i < values.length; i++) {
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107 if (values[i] != l.values[i]) {
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108 return false;
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109 }
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110 }
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111 return true;
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112 }
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113 return false;
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114 }
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115
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116 @Override
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117 public boolean equalsIgnoringKind(CiValue o) {
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118 return equals(o);
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119 }
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120
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121 /**
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122 * This is a helper class used to create virtual objects for a number of different JDK classes.
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123 */
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124 public static class CiVirtualObjectFactory {
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125 private int nextId = 0;
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126 private final RiRuntime runtime;
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127
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128 public CiVirtualObjectFactory(RiRuntime runtime) {
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129 this.runtime = runtime;
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130 }
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131
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132 public CiVirtualObject constantProxy(CiKind kind, CiValue objectValue, CiValue primitiveValue) {
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133 CiConstant cKind = CiConstant.forObject(kind);
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134 // TODO: here the ordering is hard coded... we should query RiType.fields() and act accordingly
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135 return new CiVirtualObject(runtime.getType(CiConstant.class), new CiValue[] {cKind, primitiveValue, CiValue.IllegalValue, objectValue}, nextId++);
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136 }
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137
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138 public CiValue proxy(CiValue ciValue) {
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139 switch (ciValue.kind) {
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140 case Boolean:
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141 return new CiVirtualObject(runtime.getType(Boolean.class), new CiValue[] {ciValue}, nextId++);
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142 case Byte:
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143 return new CiVirtualObject(runtime.getType(Byte.class), new CiValue[] {ciValue}, nextId++);
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144 case Char:
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145 return new CiVirtualObject(runtime.getType(Character.class), new CiValue[] {ciValue}, nextId++);
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146 case Double:
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147 return new CiVirtualObject(runtime.getType(Double.class), new CiValue[] {ciValue, CiValue.IllegalValue}, nextId++);
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148 case Float:
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149 return new CiVirtualObject(runtime.getType(Float.class), new CiValue[] {ciValue}, nextId++);
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150 case Int:
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151 return new CiVirtualObject(runtime.getType(Integer.class), new CiValue[] {ciValue}, nextId++);
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152 case Long:
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153 return new CiVirtualObject(runtime.getType(Long.class), new CiValue[] {ciValue, CiValue.IllegalValue}, nextId++);
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154 case Object:
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155 return ciValue;
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156 case Short:
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157 return new CiVirtualObject(runtime.getType(Short.class), new CiValue[] {ciValue}, nextId++);
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158 default:
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159 assert false : ciValue.kind;
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160 return null;
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161 }
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162 }
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163
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164 public CiVirtualObject arrayProxy(RiType arrayType, CiValue[] values) {
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165 return new CiVirtualObject(arrayType, values, nextId++);
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166 }
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167
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168 }
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169 }