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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/ConstantNode.java @ 12445:66efe95dd46b

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Make sure constants have the correct stack kind and unsafe accesses the correct access kind.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Wed, 16 Oct 2013 03:02:03 +0200
parents 9ad59f7fd57e
children af39ea2dc39d
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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.nodes.calc.*;
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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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33 /**
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34 * The {@code ConstantNode} represents a constant such as an integer value, long, float, object
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35 * 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 FloatingNode 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 *
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50 * @param value the constant
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51 */
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52 protected ConstantNode(Constant value, MetaAccessProvider metaAccess) {
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53 super(StampFactory.forConstant(value, metaAccess));
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54 this.value = value;
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55 }
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56
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57 @Override
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58 public void generate(LIRGeneratorTool gen) {
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59 if (gen.canInlineConstant(value) || onlyUsedInVirtualState()) {
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60 gen.setResult(this, value);
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61 } else {
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62 gen.setResult(this, gen.emitMove(value));
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63 }
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64 }
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65
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66 private boolean onlyUsedInVirtualState() {
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67 for (Node n : this.usages()) {
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68 if (n instanceof VirtualState) {
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69 // Only virtual usage.
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70 } else {
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71 return false;
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72 }
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73 }
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74 return true;
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75 }
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76
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77 public static ConstantNode forConstant(Constant constant, MetaAccessProvider metaAccess, Graph graph) {
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78 if (constant.getKind().getStackKind() == Kind.Int && constant.getKind() != Kind.Int) {
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79 return forInt(constant.asInt(), graph);
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80 } else if (constant.getKind() == Kind.Object) {
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81 return graph.unique(new ConstantNode(constant, metaAccess));
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82 } else {
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83 return graph.unique(new ConstantNode(constant));
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84 }
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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 primitive constant.
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89 */
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90 public static ConstantNode forPrimitive(Constant constant, Graph graph) {
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91 assert constant.getKind() != Kind.Object;
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92 return forConstant(constant, null, graph);
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93 }
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94
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95 /**
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96 * Returns a node for a double constant.
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97 *
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98 * @param d the double value for which to create the instruction
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99 * @param graph
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100 * @return a node for a double constant
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101 */
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102 public static ConstantNode forDouble(double d, Graph graph) {
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103 return graph.unique(new ConstantNode(Constant.forDouble(d)));
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104 }
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105
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106 /**
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107 * Returns a node for a float constant.
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108 *
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109 * @param f the float value for which to create the instruction
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110 * @param graph
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111 * @return a node for a float constant
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112 */
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113 public static ConstantNode forFloat(float f, Graph graph) {
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114 return graph.unique(new ConstantNode(Constant.forFloat(f)));
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115 }
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116
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117 /**
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118 * Returns a node for an long constant.
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119 *
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120 * @param i the long value for which to create the instruction
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121 * @param graph
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122 * @return a node for an long constant
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123 */
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124 public static ConstantNode forLong(long i, Graph graph) {
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125 return graph.unique(new ConstantNode(Constant.forLong(i)));
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126 }
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127
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128 /**
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129 * Returns a node for an integer constant.
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130 *
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131 * @param i the integer value for which to create the instruction
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132 * @param graph
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133 * @return a node for an integer constant
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134 */
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135 public static ConstantNode forInt(int i, Graph graph) {
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136 return graph.unique(new ConstantNode(Constant.forInt(i)));
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137 }
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138
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139 /**
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140 * Returns a node for a boolean constant.
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141 *
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142 * @param i the boolean value for which to create the instruction
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143 * @param graph
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144 * @return a node representing the boolean
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145 */
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146 public static ConstantNode forBoolean(boolean i, Graph graph) {
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147 return graph.unique(new ConstantNode(Constant.forInt(i ? 1 : 0)));
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148 }
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149
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150 /**
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151 * Returns a node for a byte constant.
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152 *
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153 * @param i the byte value for which to create the instruction
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154 * @param graph
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155 * @return a node representing the byte
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156 */
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157 public static ConstantNode forByte(byte i, Graph graph) {
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158 return graph.unique(new ConstantNode(Constant.forInt(i)));
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159 }
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160
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161 /**
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162 * Returns a node for a char constant.
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163 *
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164 * @param i the char value for which to create the instruction
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165 * @param graph
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166 * @return a node representing the char
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167 */
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168 public static ConstantNode forChar(char i, Graph graph) {
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169 return graph.unique(new ConstantNode(Constant.forInt(i)));
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170 }
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171
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172 /**
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173 * Returns a node for a short constant.
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174 *
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175 * @param i the short value for which to create the instruction
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176 * @param graph
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177 * @return a node representing the short
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178 */
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179 public static ConstantNode forShort(short i, Graph graph) {
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180 return graph.unique(new ConstantNode(Constant.forInt(i)));
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181 }
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182
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183 /**
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184 * Returns a node for an object constant.
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185 *
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186 * @param o the object value for which to create the instruction
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187 * @param graph
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188 * @return a node representing the object
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189 */
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190 public static ConstantNode forObject(Object o, MetaAccessProvider metaAccess, Graph graph) {
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191 assert !(o instanceof Constant) : "wrapping a Constant into a Constant";
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192 return graph.unique(new ConstantNode(Constant.forObject(o), metaAccess));
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193 }
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194
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195 public static ConstantNode forIntegerKind(Kind kind, long value, Graph graph) {
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196 switch (kind) {
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197 case Byte:
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198 case Short:
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199 case Int:
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200 return ConstantNode.forInt((int) value, graph);
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201 case Long:
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202 return ConstantNode.forLong(value, graph);
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203 default:
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204 throw GraalInternalError.shouldNotReachHere("unknown kind " + kind);
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205 }
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206 }
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207
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208 public static ConstantNode forFloatingKind(Kind kind, double value, Graph graph) {
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209 switch (kind) {
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210 case Float:
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211 return ConstantNode.forFloat((float) value, graph);
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212 case Double:
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213 return ConstantNode.forDouble(value, graph);
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214 default:
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215 throw GraalInternalError.shouldNotReachHere("unknown kind " + kind);
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216 }
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217 }
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218
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219 public static ConstantNode defaultForKind(Kind kind, Graph graph) {
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220 switch (kind) {
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221 case Boolean:
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222 case Byte:
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223 case Char:
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224 case Short:
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225 case Int:
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226 return ConstantNode.forInt(0, graph);
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227 case Double:
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228 return ConstantNode.forDouble(0.0, graph);
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229 case Float:
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230 return ConstantNode.forFloat(0.0f, graph);
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231 case Long:
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232 return ConstantNode.forLong(0L, graph);
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233 case Object:
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234 return ConstantNode.forObject(null, null, graph);
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235 default:
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236 return null;
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237 }
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238 }
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239
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240 @Override
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diff changeset
241 public Map<Object, Object> getDebugProperties(Map<Object, Object> map) {
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diff changeset
242 Map<Object, Object> properties = super.getDebugProperties(map);
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e23980f4a890 Cleanup of Kind class: remove isXxx methods
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diff changeset
243 properties.put("rawvalue", value.getKind() == Kind.Object ? value.getKind().format(value.asBoxedValue()) : value.asBoxedValue());
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244 return properties;
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245 }
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246
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diff changeset
247 @Override
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248 public String toString(Verbosity verbosity) {
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249 if (verbosity == Verbosity.Name) {
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2463eb24b644 Cleanup of Graal API: Rename methods so that it follows the getXxx naming convention and so that they are similar to the names of the java.lang.reflect classes. Remove unused methods.
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diff changeset
250 return super.toString(Verbosity.Name) + "(" + value.getKind().format(value.asBoxedValue()) + ")";
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251 } else {
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252 return super.toString(verbosity);
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253 }
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254 }
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255 }