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annotate graal/com.oracle.max.graal.nodes/src/com/oracle/max/graal/nodes/ConstantNode.java @ 3733:e233f5660da4

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Added Java files from Maxine project.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 17 Dec 2011 19:59:18 +0100
parents
children bc8527f3071c
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3733
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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.max.graal.nodes;
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24
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25 import com.oracle.max.graal.graph.*;
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26 import com.oracle.max.graal.nodes.spi.*;
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27 import com.oracle.max.graal.nodes.type.*;
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28 import com.sun.cri.ci.*;
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29 import com.sun.cri.ri.*;
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30
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31 /**
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32 * The {@code ConstantNode} represents a constant such as an integer value,
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33 * long, float, object reference, address, etc.
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34 */
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35 @NodeInfo(shortName = "Const")
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36 public final class ConstantNode extends BooleanNode implements LIRLowerable {
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37
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38 @Data public final CiConstant value;
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39 private RiRuntime runtime;
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40
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41 private ConstantNode(CiConstant value) {
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42 this(value, null);
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43 }
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44
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45 /**
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46 * Constructs a new ConstantNode representing the specified constant.
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47 * @param value the constant
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48 */
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49 private ConstantNode(CiConstant value, RiRuntime runtime) {
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50 super(StampFactory.forConstant(value, runtime));
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51 this.value = value;
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52 this.runtime = runtime;
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53 }
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54
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55 @Override
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56 public void generate(LIRGeneratorTool gen) {
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57 if (gen.canInlineConstant(value)) {
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58 gen.setResult(this, value);
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59 } else {
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60 gen.setResult(this, gen.emitMove(value));
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61 }
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62 }
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63
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64 public static ConstantNode forCiConstant(CiConstant constant, RiRuntime runtime, Graph graph) {
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65 return graph.unique(new ConstantNode(constant, runtime));
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66 }
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67
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68 /**
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69 * Returns a node for a double constant.
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70 * @param d the double value for which to create the instruction
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71 * @param graph
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72 * @return a node for a double constant
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73 */
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74 public static ConstantNode forDouble(double d, Graph graph) {
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75 return graph.unique(new ConstantNode(CiConstant.forDouble(d)));
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76 }
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77
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78 /**
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79 * Returns a node for a float constant.
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80 * @param f the float value for which to create the instruction
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81 * @param graph
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82 * @return a node for a float constant
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83 */
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84 public static ConstantNode forFloat(float f, Graph graph) {
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85 return graph.unique(new ConstantNode(CiConstant.forFloat(f)));
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86 }
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87
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88 /**
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89 * Returns a node for an long constant.
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90 * @param i the long value for which to create the instruction
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91 * @param graph
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92 * @return a node for an long constant
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93 */
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94 public static ConstantNode forLong(long i, Graph graph) {
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95 return graph.unique(new ConstantNode(CiConstant.forLong(i)));
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96 }
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97
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98 /**
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99 * Returns a node for an integer constant.
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100 * @param i the integer value for which to create the instruction
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101 * @param graph
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102 * @return a node for an integer constant
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103 */
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104 public static ConstantNode forInt(int i, Graph graph) {
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105 return graph.unique(new ConstantNode(CiConstant.forInt(i)));
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106 }
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107
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108 /**
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109 * Returns a node for a boolean constant.
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110 * @param i the boolean value for which to create the instruction
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111 * @param graph
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112 * @return a node representing the boolean
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113 */
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114 public static ConstantNode forBoolean(boolean i, Graph graph) {
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115 return graph.unique(new ConstantNode(CiConstant.forBoolean(i)));
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116 }
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117
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118 /**
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119 * Returns a node for a byte constant.
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120 * @param i the byte value for which to create the instruction
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121 * @param graph
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122 * @return a node representing the byte
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123 */
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124 public static ConstantNode forByte(byte i, Graph graph) {
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125 return graph.unique(new ConstantNode(CiConstant.forByte(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 a char constant.
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130 * @param i the char value for which to create the instruction
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131 * @param graph
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132 * @return a node representing the char
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133 */
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134 public static ConstantNode forChar(char i, Graph graph) {
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135 return graph.unique(new ConstantNode(CiConstant.forChar(i)));
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136 }
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137
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138 /**
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139 * Returns a node for a short constant.
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140 * @param i the short value for which to create the instruction
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141 * @param graph
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142 * @return a node representing the short
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143 */
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144 public static ConstantNode forShort(short i, Graph graph) {
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145 return graph.unique(new ConstantNode(CiConstant.forShort(i)));
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146 }
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147
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148 /**
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149 * Returns a node for an address (jsr/ret address) constant.
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150 * @param i the address value for which to create the instruction
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151 * @param graph
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152 * @return a node representing the address
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153 */
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154 public static ConstantNode forJsr(int i, Graph graph) {
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155 return graph.unique(new ConstantNode(CiConstant.forJsr(i)));
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156 }
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157
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158 /**
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159 * Returns a node for an object constant.
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160 * @param o the object value for which to create the instruction
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161 * @param graph
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162 * @return a node representing the object
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163 */
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164 public static ConstantNode forObject(Object o, RiRuntime runtime, Graph graph) {
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165 return graph.unique(new ConstantNode(CiConstant.forObject(o), runtime));
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166 }
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167
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168 public static ConstantNode forIntegerKind(CiKind kind, long value, Graph graph) {
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169 switch (kind) {
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170 case Byte:
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171 case Short:
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172 case Int:
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173 return ConstantNode.forInt((int) value, graph);
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174 case Long:
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175 return ConstantNode.forLong(value, graph);
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176 default:
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177 throw new InternalError("Should not reach here");
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178 }
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179 }
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180
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181 public static ConstantNode forFloatingKind(CiKind kind, double value, Graph graph) {
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182 switch (kind) {
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183 case Float:
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184 return ConstantNode.forFloat((float) value, graph);
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185 case Double:
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186 return ConstantNode.forDouble(value, graph);
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187 default:
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188 throw new InternalError("Should not reach here");
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189 }
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190 }
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191
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192 public static ConstantNode defaultForKind(CiKind kind, Graph graph) {
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193 switch(kind) {
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194 case Boolean:
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195 return ConstantNode.forBoolean(false, graph);
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196 case Byte:
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197 case Char:
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198 case Short:
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199 case Int:
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200 return ConstantNode.forInt(0, graph);
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201 case Double:
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202 return ConstantNode.forDouble(0.0, graph);
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203 case Float:
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204 return ConstantNode.forFloat(0.0f, graph);
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205 case Long:
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206 return ConstantNode.forLong(0L, graph);
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207 case Object:
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208 return ConstantNode.forObject(null, null, graph);
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209 default:
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210 return null;
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211 }
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212 }
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213
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214 @Override
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215 public String toString(Verbosity verbosity) {
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216 if (verbosity == Verbosity.Name) {
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217 return super.toString(Verbosity.Name) + "(" + value.kind.format(value.boxedValue()) + ")";
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218 } else {
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219 return super.toString(verbosity);
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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 BooleanNode negate() {
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225 return ConstantNode.forBoolean(!value.asBoolean(), graph());
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226 }
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227 }