Mercurial > hg > graal-jvmci-8
annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/ConstantNode.java @ 6329:92bc58dc5b5e
More clean up and documentation in api.code and api.meta.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 07 Sep 2012 13:40:53 +0200 |
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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.oracle.graal.nodes; |
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24 |
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25 import java.util.*; |
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26 |
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27 import com.oracle.graal.api.meta.*; |
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28 import com.oracle.graal.graph.*; |
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29 import com.oracle.graal.graph.iterators.*; |
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30 import com.oracle.graal.nodes.spi.*; |
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31 import com.oracle.graal.nodes.type.*; |
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32 |
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33 /** |
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34 * The {@code ConstantNode} represents a constant such as an integer value, |
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35 * long, float, object reference, address, etc. |
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36 */ |
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37 @NodeInfo(shortName = "Const", nameTemplate = "Const({p#rawvalue})") |
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38 public class ConstantNode extends BooleanNode implements LIRLowerable { |
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39 |
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40 public final Constant value; |
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41 |
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42 protected ConstantNode(Constant value) { |
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43 super(StampFactory.forConstant(value)); |
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44 this.value = value; |
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45 } |
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46 |
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47 /** |
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48 * Constructs a new ConstantNode representing the specified constant. |
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49 * @param value the constant |
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50 */ |
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51 protected ConstantNode(Constant value, MetaAccessProvider runtime) { |
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52 super(StampFactory.forConstant(value, runtime)); |
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53 this.value = value; |
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54 } |
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55 |
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56 @Override |
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57 public void generate(LIRGeneratorTool gen) { |
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58 if (gen.canInlineConstant(value) || onlyUsedInFrameState()) { |
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59 gen.setResult(this, value); |
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60 } else { |
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61 gen.setResult(this, gen.emitMove(value)); |
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62 } |
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63 } |
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64 |
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65 private boolean onlyUsedInFrameState() { |
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66 return usages().filter(NodePredicates.isNotA(FrameState.class)).isEmpty(); |
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67 } |
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68 |
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69 public static ConstantNode forConstant(Constant constant, MetaAccessProvider runtime, Graph graph) { |
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70 if (constant.getKind() == Kind.Object) { |
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71 return graph.unique(new ConstantNode(constant, runtime)); |
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72 } else { |
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73 return graph.unique(new ConstantNode(constant)); |
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74 } |
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75 } |
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76 |
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77 /** |
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78 * Returns a node for a double constant. |
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79 * @param d the double value for which to create the instruction |
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80 * @param graph |
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81 * @return a node for a double constant |
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82 */ |
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83 public static ConstantNode forDouble(double d, Graph graph) { |
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84 return graph.unique(new ConstantNode(Constant.forDouble(d))); |
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85 } |
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86 |
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87 /** |
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88 * Returns a node for a float constant. |
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89 * @param f the float value for which to create the instruction |
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90 * @param graph |
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91 * @return a node for a float constant |
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92 */ |
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93 public static ConstantNode forFloat(float f, Graph graph) { |
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94 return graph.unique(new ConstantNode(Constant.forFloat(f))); |
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95 } |
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96 |
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97 /** |
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98 * Returns a node for an long constant. |
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99 * @param i the long value for which to create the instruction |
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100 * @param graph |
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101 * @return a node for an long constant |
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102 */ |
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103 public static ConstantNode forLong(long i, Graph graph) { |
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104 return graph.unique(new ConstantNode(Constant.forLong(i))); |
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105 } |
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106 |
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107 /** |
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108 * Returns a node for an integer constant. |
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109 * @param i the integer value for which to create the instruction |
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110 * @param graph |
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111 * @return a node for an integer constant |
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112 */ |
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113 public static ConstantNode forInt(int i, Graph graph) { |
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114 return graph.unique(new ConstantNode(Constant.forInt(i))); |
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115 } |
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116 |
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117 /** |
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118 * Returns a node for a boolean constant. |
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119 * @param i the boolean value for which to create the instruction |
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120 * @param graph |
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121 * @return a node representing the boolean |
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122 */ |
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123 public static ConstantNode forBoolean(boolean i, Graph graph) { |
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124 return graph.unique(new ConstantNode(Constant.forBoolean(i))); |
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125 } |
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126 |
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127 /** |
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128 * Returns a node for a byte constant. |
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129 * @param i the byte value for which to create the instruction |
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130 * @param graph |
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131 * @return a node representing the byte |
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132 */ |
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133 public static ConstantNode forByte(byte i, Graph graph) { |
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134 return graph.unique(new ConstantNode(Constant.forByte(i))); |
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135 } |
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136 |
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137 /** |
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138 * Returns a node for a char constant. |
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139 * @param i the char value for which to create the instruction |
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140 * @param graph |
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141 * @return a node representing the char |
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142 */ |
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143 public static ConstantNode forChar(char i, Graph graph) { |
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144 return graph.unique(new ConstantNode(Constant.forChar(i))); |
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145 } |
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146 |
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147 /** |
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148 * Returns a node for a short constant. |
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149 * @param i the short value for which to create the instruction |
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150 * @param graph |
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151 * @return a node representing the short |
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152 */ |
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153 public static ConstantNode forShort(short i, Graph graph) { |
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154 return graph.unique(new ConstantNode(Constant.forShort(i))); |
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155 } |
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156 |
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157 /** |
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158 * Returns a node for an address (jsr/ret address) constant. |
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159 * @param i the address value for which to create the instruction |
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160 * @param graph |
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161 * @return a node representing the address |
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162 */ |
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163 public static ConstantNode forJsr(int i, Graph graph) { |
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164 return graph.unique(new ConstantNode(Constant.forJsr(i))); |
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165 } |
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166 |
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167 /** |
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168 * Returns a node for an object constant. |
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169 * @param o the object value for which to create the instruction |
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170 * @param graph |
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171 * @return a node representing the object |
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172 */ |
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173 public static ConstantNode forObject(Object o, MetaAccessProvider runtime, Graph graph) { |
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174 return graph.unique(new ConstantNode(Constant.forObject(o), runtime)); |
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175 } |
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176 |
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177 public static ConstantNode forIntegerKind(Kind kind, long value, Graph graph) { |
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178 switch (kind) { |
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179 case Byte: |
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180 case Short: |
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181 case Int: |
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182 return ConstantNode.forInt((int) value, graph); |
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183 case Long: |
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184 return ConstantNode.forLong(value, graph); |
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185 default: |
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186 throw new InternalError("Should not reach here"); |
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187 } |
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188 } |
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189 |
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190 public static ConstantNode forFloatingKind(Kind kind, double value, Graph graph) { |
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191 switch (kind) { |
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192 case Float: |
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193 return ConstantNode.forFloat((float) value, graph); |
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194 case Double: |
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195 return ConstantNode.forDouble(value, graph); |
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196 default: |
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197 throw new InternalError("Should not reach here"); |
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198 } |
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199 } |
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200 |
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201 public static ConstantNode defaultForKind(Kind kind, Graph graph) { |
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202 switch(kind) { |
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203 case Boolean: |
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204 return ConstantNode.forBoolean(false, graph); |
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205 case Byte: |
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206 case Char: |
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207 case Short: |
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208 case Int: |
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209 return ConstantNode.forInt(0, graph); |
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210 case Double: |
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211 return ConstantNode.forDouble(0.0, graph); |
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212 case Float: |
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213 return ConstantNode.forFloat(0.0f, graph); |
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214 case Long: |
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215 return ConstantNode.forLong(0L, graph); |
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216 case Object: |
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217 return ConstantNode.forObject(null, null, graph); |
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218 default: |
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219 return null; |
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220 } |
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221 } |
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222 |
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223 @Override |
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224 public Map<Object, Object> getDebugProperties(Map<Object, Object> map) { |
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225 Map<Object, Object> properties = super.getDebugProperties(map); |
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226 properties.put("rawvalue", value.getKind().isObject() ? value.getKind().format(value.boxedValue()) : value.boxedValue()); |
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227 return properties; |
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228 } |
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229 |
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230 @Override |
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231 public String toString(Verbosity verbosity) { |
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232 if (verbosity == Verbosity.Name) { |
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233 return super.toString(Verbosity.Name) + "(" + value.getKind().format(value.boxedValue()) + ")"; |
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234 } else { |
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235 return super.toString(verbosity); |
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236 } |
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237 } |
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238 } |