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annotate graal/com.oracle.jvmci.code/src/com/oracle/jvmci/code/ValueUtil.java @ 21556:48c1ebd24120

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renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Wed, 27 May 2015 00:36:16 +0200
parents graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/ValueUtil.java@50b6f616b3c7
children f5b549811bac
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1 /*
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2 * Copyright (c) 2012, 2014, 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.jvmci.code;
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24
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25 import com.oracle.jvmci.meta.Kind;
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26 import com.oracle.jvmci.meta.Value;
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27 import com.oracle.jvmci.meta.AllocatableValue;
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28 import com.oracle.jvmci.meta.JavaConstant;
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29 import java.util.*;
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30
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31
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32 /**
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33 * Utility class for working with the {@link Value} class and its subclasses.
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34 */
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35 public final class ValueUtil {
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36
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37 public static boolean isIllegal(Value value) {
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38 assert value != null;
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39 return Value.ILLEGAL.equals(value);
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40 }
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41
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42 public static boolean isLegal(Value value) {
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43 return !isIllegal(value);
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44 }
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45
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46 public static boolean isVirtualObject(Value value) {
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47 assert value != null;
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48 return value instanceof VirtualObject;
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49 }
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50
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51 public static VirtualObject asVirtualObject(Value value) {
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52 assert value != null;
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53 return (VirtualObject) value;
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54 }
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55
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56 public static boolean isConstant(Value value) {
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57 assert value != null;
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58 return value instanceof JavaConstant;
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59 }
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60
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61 public static JavaConstant asConstant(Value value) {
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62 assert value != null;
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63 return (JavaConstant) value;
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64 }
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65
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66 public static boolean isAllocatableValue(Value value) {
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67 assert value != null;
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68 return value instanceof AllocatableValue;
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69 }
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70
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71 public static AllocatableValue asAllocatableValue(Value value) {
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72 assert value != null;
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73 return (AllocatableValue) value;
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74 }
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75
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76 public static boolean isStackSlot(Value value) {
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77 assert value != null;
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78 return value instanceof StackSlot;
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79 }
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80
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81 public static StackSlot asStackSlot(Value value) {
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82 assert value != null;
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83 return (StackSlot) value;
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84 }
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85
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86 public static boolean isStackSlotValue(Value value) {
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87 assert value != null;
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88 return value instanceof StackSlotValue;
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89 }
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90
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91 public static StackSlotValue asStackSlotValue(Value value) {
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92 assert value != null;
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93 return (StackSlotValue) value;
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94 }
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95
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96 public static boolean isVirtualStackSlot(Value value) {
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97 assert value != null;
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98 return value instanceof VirtualStackSlot;
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99 }
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100
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101 public static VirtualStackSlot asVirtualStackSlot(Value value) {
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102 assert value != null;
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103 return (VirtualStackSlot) value;
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104 }
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105
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106 public static boolean isRegister(Value value) {
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107 assert value != null;
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108 return value instanceof RegisterValue;
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109 }
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110
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111 public static Register asRegister(Value value) {
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112 assert value != null;
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113 return ((RegisterValue) value).getRegister();
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114 }
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115
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116 public static Register asIntReg(Value value) {
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117 if (value.getKind().getStackKind() != Kind.Int) {
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118 throw new InternalError("needed Int got: " + value.getKind());
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119 } else {
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120 return asRegister(value);
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121 }
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122 }
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123
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124 public static Register asLongReg(Value value) {
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125 if (value.getKind() != Kind.Long) {
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126 throw new InternalError("needed Long got: " + value.getKind());
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127 } else {
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128 return asRegister(value);
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129 }
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130 }
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131
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132 public static Register asObjectReg(Value value) {
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133 assert value.getKind() == Kind.Object : value.getKind();
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134 return asRegister(value);
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135 }
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136
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137 public static Register asFloatReg(Value value) {
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138 assert value.getKind() == Kind.Float : value.getKind();
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139 return asRegister(value);
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140 }
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141
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142 public static Register asDoubleReg(Value value) {
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143 assert value.getKind() == Kind.Double : value.getKind();
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144 return asRegister(value);
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145 }
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146
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147 public static boolean sameRegister(Value v1, Value v2) {
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148 return isRegister(v1) && isRegister(v2) && asRegister(v1).equals(asRegister(v2));
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149 }
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150
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151 public static boolean sameRegister(Value v1, Value v2, Value v3) {
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152 return sameRegister(v1, v2) && sameRegister(v1, v3);
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153 }
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154
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155 /**
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156 * Checks if all the provided values are different physical registers. The parameters can be
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157 * either {@link Register registers}, {@link Value values} or arrays of them. All values that
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158 * are not {@link RegisterValue registers} are ignored.
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159 */
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160 public static boolean differentRegisters(Object... values) {
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161 List<Register> registers = collectRegisters(values, new ArrayList<Register>());
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162 for (int i = 1; i < registers.size(); i++) {
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163 Register r1 = registers.get(i);
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164 for (int j = 0; j < i; j++) {
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165 Register r2 = registers.get(j);
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166 if (r1.equals(r2)) {
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167 return false;
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168 }
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169 }
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170 }
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171 return true;
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172 }
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173
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174 private static List<Register> collectRegisters(Object[] values, List<Register> registers) {
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175 for (Object o : values) {
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176 if (o instanceof Register) {
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177 registers.add((Register) o);
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178 } else if (o instanceof Value) {
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179 if (isRegister((Value) o)) {
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180 registers.add(asRegister((Value) o));
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181 }
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182 } else if (o instanceof Object[]) {
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183 collectRegisters((Object[]) o, registers);
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184 } else {
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185 throw new IllegalArgumentException("Not a Register or Value: " + o);
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186 }
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187 }
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188 return registers;
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189 }
4183
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190 }