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annotate graal/GraalCompiler/src/com/sun/c1x/ir/Constant.java @ 2851:14708c03abba

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Remove isNonNull
author Gilles Duboscq <gilles.duboscq@oracle.com>
date Tue, 07 Jun 2011 11:36:32 +0200
parents caf55daa41dc
children
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1 /*
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2 * Copyright (c) 2009, 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.c1x.ir;
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24
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25 import static com.sun.c1x.C1XCompilation.*;
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26
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27 import com.oracle.graal.graph.*;
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28 import com.sun.c1x.debug.*;
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29 import com.sun.cri.ci.*;
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30 import com.sun.cri.ri.*;
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31
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32 /**
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33 * The {@code Constant} instruction represents a constant such as an integer value,
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34 * long, float, object reference, address, etc.
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35 */
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36 public final class Constant extends FloatingNode {
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37
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38 private static final int INPUT_COUNT = 0;
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39 private static final int SUCCESSOR_COUNT = 0;
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40
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41 public final CiConstant value;
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42
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43 /**
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44 * Constructs a new instruction representing the specified constant.
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45 * @param value the constant
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46 * @param graph
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47 */
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48 public Constant(CiConstant value, Graph graph) {
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49 super(value.kind.stackKind(), INPUT_COUNT, SUCCESSOR_COUNT, graph);
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50 this.value = value;
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51 }
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52
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53 @Override
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54 public void accept(ValueVisitor v) {
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55 v.visitConstant(this);
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56 }
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57
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58 /**
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59 * Creates an instruction for a double constant.
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60 * @param d the double value for which to create the instruction
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61 * @param graph
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62 * @return an instruction representing the double
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63 */
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64 public static Constant forDouble(double d, Graph graph) {
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65 return new Constant(CiConstant.forDouble(d), graph);
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66 }
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67
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68 /**
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69 * Creates an instruction for a float constant.
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70 * @param f the float value for which to create the instruction
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71 * @return an instruction representing the float
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72 */
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73 public static Constant forFloat(float f, Graph graph) {
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74 return new Constant(CiConstant.forFloat(f), graph);
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75 }
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76
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77 /**
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78 * Creates an instruction for an long constant.
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79 * @param i the long value for which to create the instruction
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80 * @return an instruction representing the long
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81 */
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82 public static Constant forLong(long i, Graph graph) {
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83 return new Constant(CiConstant.forLong(i), graph);
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84 }
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85
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86 /**
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87 * Creates an instruction for an integer constant.
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88 * @param i the integer value for which to create the instruction
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89 * @return an instruction representing the integer
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90 */
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91 public static Constant forInt(int i, Graph graph) {
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92 return new Constant(CiConstant.forInt(i), graph);
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93 }
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94
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95 /**
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96 * Creates an instruction for a boolean constant.
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97 * @param i the boolean value for which to create the instruction
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98 * @return an instruction representing the boolean
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99 */
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100 public static Constant forBoolean(boolean i, Graph graph) {
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101 return new Constant(CiConstant.forBoolean(i), graph);
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102 }
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103
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104 /**
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105 * Creates an instruction for an address (jsr/ret address) constant.
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106 * @param i the address value for which to create the instruction
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107 * @return an instruction representing the address
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108 */
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109 public static Constant forJsr(int i, Graph graph) {
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110 return new Constant(CiConstant.forJsr(i), graph);
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111 }
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112
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113 /**
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114 * Creates an instruction for an object constant.
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115 * @param o the object value for which to create the instruction
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116 * @return an instruction representing the object
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117 */
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118 public static Constant forObject(Object o, Graph graph) {
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119 return new Constant(CiConstant.forObject(o), graph);
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120 }
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121
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122 /**
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123 * Creates an instruction for a word constant.
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124 * @param val the word value for which to create the instruction
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125 * @return an instruction representing the word
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126 */
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127 public static Constant forWord(long val, Graph graph) {
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128 return new Constant(CiConstant.forWord(val), graph);
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129 }
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130
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131 public static Constant defaultForKind(CiKind kind, Graph graph) {
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132 switch(kind) {
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133 case Boolean:
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134 return Constant.forBoolean(false, graph);
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135 case Byte:
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136 case Char:
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137 case Short:
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138 case Int:
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139 return Constant.forInt(0, graph);
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140 case Double:
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141 return Constant.forDouble(0.0, graph);
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142 case Float:
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143 return Constant.forFloat(0.0f, graph);
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144 case Long:
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145 return Constant.forLong(0L, graph);
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146 case Object:
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147 return Constant.forObject(null, graph);
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148 case Word:
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149 return Constant.forWord(0L, graph);
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150 default:
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151 return null;
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152 }
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153 }
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154
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155 @Override
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156 public String toString() {
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157 return super.toString() + "(" + value + ")";
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158 }
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159
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160 @Override
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161 public int valueNumber() {
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162 return 0x50000000 | value.hashCode();
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163 }
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164
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165 @Override
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166 public boolean valueEqual(Node i) {
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167 return i instanceof Constant && ((Constant) i).value.equivalent(this.value);
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168 }
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169
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170 @Override
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171 public RiType declaredType() {
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172 RiRuntime runtime = compilation().runtime;
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173 if (kind.isPrimitive()) {
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174 runtime.asRiType(kind);
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175 }
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176 return runtime.getTypeOf(asConstant());
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177 }
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178
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179 @Override
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180 public RiType exactType() {
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181 return declaredType();
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182 }
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183
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184 @Override
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185 public void print(LogStream out) {
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186 out.print(value.valueString());
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187 }
2616
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188
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189 @Override
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190 public String shortName() {
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191 return value.name();
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192 }
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193
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194 @Override
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195 public Node copy(Graph into) {
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196 Constant x = new Constant(value, into);
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197 return x;
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198 }
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199 }