Mercurial > hg > graal-jvmci-8
annotate graal/Compiler/src/com/sun/c1x/ir/Constant.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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2507
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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.sun.c1x.debug.*; |
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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 Constant} instruction 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 * @author Ben L. Titzer |
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36 */ |
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37 public final class Constant extends Instruction { |
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38 |
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39 public final CiConstant value; |
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40 |
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41 /** |
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42 * Constructs a new instruction representing the specified constant. |
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43 * @param value the constant |
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44 */ |
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45 public Constant(CiConstant value) { |
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46 super(value.kind.stackKind()); |
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47 this.value = value; |
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48 initFlag(Value.Flag.NonNull, value.isNonNull()); |
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49 } |
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50 |
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51 @Override |
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52 public void accept(ValueVisitor v) { |
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53 v.visitConstant(this); |
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54 } |
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55 |
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56 /** |
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57 * Creates an instruction for a double constant. |
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58 * @param d the double value for which to create the instruction |
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59 * @return an instruction representing the double |
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60 */ |
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61 public static Constant forDouble(double d) { |
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62 return new Constant(CiConstant.forDouble(d)); |
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63 } |
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64 |
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65 /** |
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66 * Creates an instruction for a float constant. |
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67 * @param f the float value for which to create the instruction |
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68 * @return an instruction representing the float |
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69 */ |
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70 public static Constant forFloat(float f) { |
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71 return new Constant(CiConstant.forFloat(f)); |
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72 } |
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73 |
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74 /** |
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75 * Creates an instruction for an long constant. |
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76 * @param i the long value for which to create the instruction |
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77 * @return an instruction representing the long |
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78 */ |
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79 public static Constant forLong(long i) { |
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80 return new Constant(CiConstant.forLong(i)); |
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81 } |
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82 |
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83 /** |
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84 * Creates an instruction for an integer constant. |
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85 * @param i the integer value for which to create the instruction |
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86 * @return an instruction representing the integer |
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87 */ |
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88 public static Constant forInt(int i) { |
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89 return new Constant(CiConstant.forInt(i)); |
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90 } |
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91 |
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92 /** |
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93 * Creates an instruction for a boolean constant. |
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94 * @param i the boolean value for which to create the instruction |
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95 * @return an instruction representing the boolean |
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96 */ |
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97 public static Constant forBoolean(boolean i) { |
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98 return new Constant(CiConstant.forBoolean(i)); |
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99 } |
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100 |
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101 /** |
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102 * Creates an instruction for an address (jsr/ret address) constant. |
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103 * @param i the address value for which to create the instruction |
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104 * @return an instruction representing the address |
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105 */ |
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106 public static Constant forJsr(int i) { |
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107 return new Constant(CiConstant.forJsr(i)); |
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108 } |
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109 |
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110 /** |
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111 * Creates an instruction for an object constant. |
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112 * @param o the object value for which to create the instruction |
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113 * @return an instruction representing the object |
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114 */ |
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115 public static Constant forObject(Object o) { |
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116 return new Constant(CiConstant.forObject(o)); |
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117 } |
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118 |
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119 /** |
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120 * Creates an instruction for a word constant. |
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121 * @param val the word value for which to create the instruction |
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122 * @return an instruction representing the word |
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123 */ |
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124 public static Constant forWord(long val) { |
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125 return new Constant(CiConstant.forWord(val)); |
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126 } |
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127 |
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128 @Override |
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129 public String toString() { |
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130 return super.toString() + "(" + value + ")"; |
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131 } |
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132 |
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133 @Override |
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134 public int valueNumber() { |
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135 return 0x50000000 | value.hashCode(); |
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136 } |
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137 |
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138 @Override |
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139 public boolean valueEqual(Instruction i) { |
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140 return i instanceof Constant && ((Constant) i).value.equivalent(this.value); |
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141 } |
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142 |
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143 @Override |
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144 public RiType declaredType() { |
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145 RiRuntime runtime = compilation().runtime; |
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146 if (kind.isPrimitive()) { |
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147 runtime.asRiType(kind); |
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148 } |
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149 return runtime.getTypeOf(asConstant()); |
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150 } |
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151 |
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152 @Override |
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153 public RiType exactType() { |
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154 return declaredType(); |
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155 } |
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156 |
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157 @Override |
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158 public void print(LogStream out) { |
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159 out.print(value.valueString()); |
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160 } |
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161 } |