Mercurial > hg > graal-jvmci-8
annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/ri/RiConstant.java @ 5502:13aee5aba8cc
Moved RiConstant to cri.ri package.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Thu, 07 Jun 2012 17:07:42 +0200 |
parents | graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/RiConstant.java@d89b20486d87 |
children | 438ab53efdd0 |
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1 /* |
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2 * Copyright (c) 2009, 2012, 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.cri.ri; |
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24 |
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25 import com.oracle.max.cri.ci.*; |
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26 |
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27 /** |
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28 * Represents a constant (boxed) value, such as an integer, floating point number, or object reference, |
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29 * within the compiler and across the compiler/runtime interface. Exports a set of {@code CiConstant} |
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30 * instances that represent frequently used constant values, such as {@link #ZERO}. |
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31 */ |
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32 public final class RiConstant extends CiValue { |
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33 private static final long serialVersionUID = -6355452536852663986L; |
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34 |
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35 private static final RiConstant[] INT_CONSTANT_CACHE = new RiConstant[100]; |
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36 static { |
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37 for (int i = 0; i < INT_CONSTANT_CACHE.length; ++i) { |
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38 INT_CONSTANT_CACHE[i] = new RiConstant(CiKind.Int, i); |
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39 } |
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40 } |
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41 |
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42 public static final RiConstant NULL_OBJECT = new RiConstant(CiKind.Object, null); |
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43 public static final RiConstant INT_MINUS_1 = new RiConstant(CiKind.Int, -1); |
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44 public static final RiConstant INT_0 = forInt(0); |
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45 public static final RiConstant INT_1 = forInt(1); |
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46 public static final RiConstant INT_2 = forInt(2); |
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47 public static final RiConstant INT_3 = forInt(3); |
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48 public static final RiConstant INT_4 = forInt(4); |
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49 public static final RiConstant INT_5 = forInt(5); |
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50 public static final RiConstant LONG_0 = new RiConstant(CiKind.Long, 0L); |
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51 public static final RiConstant LONG_1 = new RiConstant(CiKind.Long, 1L); |
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52 public static final RiConstant FLOAT_0 = new RiConstant(CiKind.Float, Float.floatToRawIntBits(0.0F)); |
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53 public static final RiConstant FLOAT_1 = new RiConstant(CiKind.Float, Float.floatToRawIntBits(1.0F)); |
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54 public static final RiConstant FLOAT_2 = new RiConstant(CiKind.Float, Float.floatToRawIntBits(2.0F)); |
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55 public static final RiConstant DOUBLE_0 = new RiConstant(CiKind.Double, Double.doubleToRawLongBits(0.0D)); |
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56 public static final RiConstant DOUBLE_1 = new RiConstant(CiKind.Double, Double.doubleToRawLongBits(1.0D)); |
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57 public static final RiConstant TRUE = new RiConstant(CiKind.Boolean, 1L); |
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58 public static final RiConstant FALSE = new RiConstant(CiKind.Boolean, 0L); |
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59 |
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60 static { |
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61 assert NULL_OBJECT.isDefaultValue(); |
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62 assert INT_0.isDefaultValue(); |
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63 assert FLOAT_0.isDefaultValue(); |
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64 assert DOUBLE_0.isDefaultValue(); |
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65 assert FALSE.isDefaultValue(); |
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66 |
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67 // Ensure difference between 0.0f and -0.0f is preserved |
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68 assert FLOAT_0 != forFloat(-0.0F); |
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69 assert !forFloat(-0.0F).isDefaultValue(); |
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70 |
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71 // Ensure difference between 0.0d and -0.0d is preserved |
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72 assert DOUBLE_0 != forDouble(-0.0d); |
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73 assert !forDouble(-0.0D).isDefaultValue(); |
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74 |
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75 assert NULL_OBJECT.isNull(); |
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76 } |
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77 |
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78 /** |
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79 * The boxed object value. This is ignored iff {@code !kind.isObject()}. |
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80 */ |
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81 private final Object object; |
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82 |
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83 /** |
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84 * The boxed primitive value as a {@code long}. This is ignored iff {@code kind.isObject()}. |
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85 * For {@code float} and {@code double} values, this value is the result of |
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86 * {@link Float#floatToRawIntBits(float)} and {@link Double#doubleToRawLongBits(double)} respectively. |
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87 */ |
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88 private final long primitive; |
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89 |
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90 /** |
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91 * Create a new constant represented by the specified object reference. |
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92 * |
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93 * @param kind the type of this constant |
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94 * @param object the value of this constant |
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95 */ |
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96 private RiConstant(CiKind kind, Object object) { |
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97 super(kind); |
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98 this.object = object; |
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99 this.primitive = 0L; |
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100 } |
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101 |
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102 /** |
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103 * Create a new constant represented by the specified primitive. |
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104 * |
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105 * @param kind the type of this constant |
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106 * @param primitive the value of this constant |
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107 */ |
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108 public RiConstant(CiKind kind, long primitive) { |
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109 super(kind); |
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110 this.object = null; |
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111 this.primitive = primitive; |
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112 } |
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113 |
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114 /** |
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115 * Checks whether this constant is non-null. |
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116 * @return {@code true} if this constant is a primitive, or an object constant that is not null |
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117 */ |
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118 public boolean isNonNull() { |
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119 return !kind.isObject() || object != null; |
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120 } |
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121 |
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122 /** |
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123 * Checks whether this constant is null. |
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124 * @return {@code true} if this constant is the null constant |
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125 */ |
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126 public boolean isNull() { |
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127 return kind.isObject() && object == null; |
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128 } |
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129 |
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130 @Override |
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131 public String toString() { |
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132 return kind.javaName + "[" + kind.format(boxedValue()) + (kind != CiKind.Object ? "|0x" + Long.toHexString(primitive) : "") + "]"; |
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133 } |
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134 |
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135 /** |
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136 * Gets this constant's value as a string. |
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137 * |
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138 * @return this constant's value as a string |
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139 */ |
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140 public String valueString() { |
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141 if (kind.isPrimitive()) { |
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142 return boxedValue().toString(); |
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143 } else if (kind.isObject()) { |
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144 if (object == null) { |
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145 return "null"; |
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146 } else if (object instanceof String) { |
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147 return "\"" + object + "\""; |
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148 } else { |
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149 return "<object: " + kind.format(object) + ">"; |
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150 } |
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151 } else if (kind.isJsr()) { |
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152 return "bci:" + boxedValue().toString(); |
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153 } else { |
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154 return "???"; |
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155 } |
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156 } |
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157 |
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158 /** |
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159 * Returns the value of this constant as a boxed Java value. |
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160 * @return the value of this constant |
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161 */ |
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162 public Object boxedValue() { |
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163 // Checkstyle: stop |
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164 switch (kind) { |
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165 case Byte: return (byte) asInt(); |
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166 case Boolean: return asInt() == 0 ? Boolean.FALSE : Boolean.TRUE; |
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167 case Short: return (short) asInt(); |
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168 case Char: return (char) asInt(); |
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169 case Jsr: return (int) primitive; |
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170 case Int: return asInt(); |
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171 case Long: return asLong(); |
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172 case Float: return asFloat(); |
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173 case Double: return asDouble(); |
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174 case Object: return object; |
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175 } |
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176 // Checkstyle: resume |
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177 throw new IllegalArgumentException(); |
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178 } |
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179 |
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Renaming CiConstant => RiConstant.
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180 private boolean valueEqual(RiConstant other, boolean ignoreKind) { |
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181 // must have equivalent kinds to be equal |
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182 if (!ignoreKind && kind != other.kind) { |
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183 return false; |
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184 } |
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185 if (kind.isObject()) { |
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186 return object == other.object; |
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187 } |
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188 return primitive == other.primitive; |
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189 } |
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190 |
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191 /** |
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192 * Converts this constant to a primitive int. |
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193 * @return the int value of this constant |
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194 */ |
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195 public int asInt() { |
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196 if (kind.stackKind().isInt() || kind.isJsr()) { |
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197 return (int) primitive; |
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198 } |
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199 throw new Error("Constant is not int: " + this); |
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200 } |
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201 |
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|
202 /** |
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203 * Converts this constant to a primitive boolean. |
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204 * @return the boolean value of this constant |
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205 */ |
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206 public boolean asBoolean() { |
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207 if (kind == CiKind.Boolean) { |
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208 return primitive != 0L; |
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209 } |
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210 throw new Error("Constant is not boolean: " + this); |
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211 } |
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212 |
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|
213 /** |
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214 * Converts this constant to a primitive long. |
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215 * @return the long value of this constant |
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|
216 */ |
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217 public long asLong() { |
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218 // Checkstyle: stop |
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219 switch (kind.stackKind()) { |
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220 case Jsr: |
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|
221 case Int: |
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222 case Long: return primitive; |
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223 case Float: return (long) asFloat(); |
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224 case Double: return (long) asDouble(); |
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225 default: throw new Error("Constant is not long: " + this); |
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226 } |
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227 // Checkstyle: resume |
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228 } |
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229 |
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|
230 /** |
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|
231 * Converts this constant to a primitive float. |
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|
232 * @return the float value of this constant |
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|
233 */ |
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|
234 public float asFloat() { |
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|
235 if (kind.isFloat()) { |
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|
236 return Float.intBitsToFloat((int) primitive); |
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|
237 } |
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238 throw new Error("Constant is not float: " + this); |
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|
239 } |
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|
240 |
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|
241 /** |
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|
242 * Converts this constant to a primitive double. |
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|
243 * @return the double value of this constant |
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|
244 */ |
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|
245 public double asDouble() { |
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246 if (kind.isFloat()) { |
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247 return Float.intBitsToFloat((int) primitive); |
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248 } |
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249 if (kind.isDouble()) { |
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250 return Double.longBitsToDouble(primitive); |
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251 } |
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252 throw new Error("Constant is not double: " + this); |
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253 } |
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254 |
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255 /** |
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256 * Converts this constant to the object reference it represents. |
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257 * @return the object which this constant represents |
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258 */ |
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259 public Object asObject() { |
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260 if (kind.isObject()) { |
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261 return object; |
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262 } |
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263 throw new Error("Constant is not object: " + this); |
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264 } |
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265 |
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266 /** |
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267 * Converts this constant to the jsr reference it represents. |
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268 * @return the object which this constant represents |
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269 */ |
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270 public int asJsr() { |
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271 if (kind.isJsr()) { |
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272 return (int) primitive; |
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273 } |
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274 throw new Error("Constant is not jsr: " + this); |
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275 } |
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276 |
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277 /** |
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278 * Unchecked access to a primitive value. |
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279 * @return |
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280 */ |
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281 public long asPrimitive() { |
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282 if (kind.isObject()) { |
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283 throw new Error("Constant is not primitive: " + this); |
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284 } |
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285 return primitive; |
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286 } |
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287 |
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288 /** |
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289 * Computes the hashcode of this constant. |
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290 * @return a suitable hashcode for this constant |
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291 */ |
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292 @Override |
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293 public int hashCode() { |
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294 if (kind.isObject()) { |
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295 return System.identityHashCode(object); |
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296 } |
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297 return (int) primitive; |
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298 } |
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299 |
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300 /** |
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301 * Checks whether this constant equals another object. This is only |
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302 * true if the other object is a constant and has the same value. |
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303 * @param o the object to compare equality |
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304 * @return {@code true} if this constant is equivalent to the specified object |
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305 */ |
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306 @Override |
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307 public boolean equals(Object o) { |
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308 return o == this || o instanceof RiConstant && valueEqual((RiConstant) o, false); |
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309 } |
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310 |
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311 /** |
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312 * Checks whether this constant is identical to another constant or has the same value as it. |
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313 * @param other the constant to compare for equality against this constant |
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314 * @return {@code true} if this constant is equivalent to {@code other} |
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315 */ |
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316 public boolean equivalent(RiConstant other) { |
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317 return other == this || valueEqual(other, false); |
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318 } |
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319 |
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320 /** |
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321 * Checks whether this constant is the default value for its type. |
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322 * @return {@code true} if the value is the default value for its type; {@code false} otherwise |
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323 */ |
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324 public boolean isDefaultValue() { |
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325 // Checkstyle: stop |
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326 switch (kind.stackKind()) { |
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327 case Int: return asInt() == 0; |
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328 case Long: return asLong() == 0; |
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329 case Float: return this == FLOAT_0; |
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330 case Double: return this == DOUBLE_0; |
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331 case Object: return object == null; |
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332 } |
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333 // Checkstyle: resume |
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334 throw new IllegalArgumentException("Cannot det default CiConstant for kind " + kind); |
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335 } |
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336 |
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337 /** |
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338 * Gets the default value for a given kind. |
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339 * |
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340 * @return the default value for {@code kind}'s {@linkplain CiKind#stackKind() stack kind} |
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341 */ |
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342 public static RiConstant defaultValue(CiKind kind) { |
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343 // Checkstyle: stop |
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344 switch (kind.stackKind()) { |
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345 case Int: return INT_0; |
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346 case Long: return LONG_0; |
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347 case Float: return FLOAT_0; |
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348 case Double: return DOUBLE_0; |
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349 case Object: return NULL_OBJECT; |
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350 } |
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351 // Checkstyle: resume |
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352 throw new IllegalArgumentException("Cannot get default CiConstant for kind " + kind); |
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353 } |
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354 |
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355 /** |
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356 * Creates a boxed double constant. |
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357 * @param d the double value to box |
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358 * @return a boxed copy of {@code value} |
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359 */ |
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360 public static RiConstant forDouble(double d) { |
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361 if (Double.compare(0.0D, d) == 0) { |
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362 return DOUBLE_0; |
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363 } |
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364 if (Double.compare(d, 1.0D) == 0) { |
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365 return DOUBLE_1; |
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366 } |
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367 return new RiConstant(CiKind.Double, Double.doubleToRawLongBits(d)); |
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368 } |
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369 |
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|
370 /** |
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371 * Creates a boxed float constant. |
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372 * @param f the float value to box |
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|
373 * @return a boxed copy of {@code value} |
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374 */ |
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375 public static RiConstant forFloat(float f) { |
3733
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parents:
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376 if (Float.compare(f, 0.0F) == 0) { |
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parents:
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377 return FLOAT_0; |
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parents:
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|
378 } |
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parents:
diff
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|
379 if (Float.compare(f, 1.0F) == 0) { |
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parents:
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380 return FLOAT_1; |
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parents:
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|
381 } |
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parents:
diff
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|
382 if (Float.compare(f, 2.0F) == 0) { |
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parents:
diff
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383 return FLOAT_2; |
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parents:
diff
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|
384 } |
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385 return new RiConstant(CiKind.Float, Float.floatToRawIntBits(f)); |
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parents:
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386 } |
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parents:
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387 |
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parents:
diff
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|
388 /** |
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parents:
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389 * Creates a boxed long constant. |
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parents:
diff
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|
390 * @param i the long value to box |
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parents:
diff
changeset
|
391 * @return a boxed copy of {@code value} |
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parents:
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|
392 */ |
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393 public static RiConstant forLong(long i) { |
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394 return i == 0 ? LONG_0 : i == 1 ? LONG_1 : new RiConstant(CiKind.Long, i); |
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395 } |
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parents:
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396 |
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parents:
diff
changeset
|
397 /** |
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parents:
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|
398 * Creates a boxed integer constant. |
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parents:
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399 * @param i the integer value to box |
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parents:
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400 * @return a boxed copy of {@code value} |
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parents:
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|
401 */ |
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402 public static RiConstant forInt(int i) { |
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403 if (i == -1) { |
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parents:
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404 return INT_MINUS_1; |
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parents:
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|
405 } |
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parents:
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|
406 if (i >= 0 && i < INT_CONSTANT_CACHE.length) { |
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parents:
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|
407 return INT_CONSTANT_CACHE[i]; |
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parents:
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|
408 } |
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409 return new RiConstant(CiKind.Int, i); |
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parents:
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|
410 } |
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parents:
diff
changeset
|
411 |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
412 /** |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
413 * Creates a boxed byte constant. |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
414 * @param i the byte value to box |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
415 * @return a boxed copy of {@code value} |
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parents:
diff
changeset
|
416 */ |
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|
417 public static RiConstant forByte(byte i) { |
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418 return new RiConstant(CiKind.Byte, i); |
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|
419 } |
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parents:
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|
420 |
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parents:
diff
changeset
|
421 /** |
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parents:
diff
changeset
|
422 * Creates a boxed boolean constant. |
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parents:
diff
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|
423 * @param i the boolean value to box |
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parents:
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|
424 * @return a boxed copy of {@code value} |
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parents:
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|
425 */ |
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|
426 public static RiConstant forBoolean(boolean i) { |
3733
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|
427 return i ? TRUE : FALSE; |
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parents:
diff
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|
428 } |
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parents:
diff
changeset
|
429 |
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parents:
diff
changeset
|
430 /** |
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parents:
diff
changeset
|
431 * Creates a boxed char constant. |
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parents:
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|
432 * @param i the char value to box |
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parents:
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|
433 * @return a boxed copy of {@code value} |
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parents:
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changeset
|
434 */ |
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|
435 public static RiConstant forChar(char i) { |
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436 return new RiConstant(CiKind.Char, i); |
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|
437 } |
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parents:
diff
changeset
|
438 |
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parents:
diff
changeset
|
439 /** |
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parents:
diff
changeset
|
440 * Creates a boxed short constant. |
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parents:
diff
changeset
|
441 * @param i the short value to box |
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parents:
diff
changeset
|
442 * @return a boxed copy of {@code value} |
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parents:
diff
changeset
|
443 */ |
5501
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|
444 public static RiConstant forShort(short i) { |
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|
445 return new RiConstant(CiKind.Short, i); |
3733
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parents:
diff
changeset
|
446 } |
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parents:
diff
changeset
|
447 |
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parents:
diff
changeset
|
448 /** |
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parents:
diff
changeset
|
449 * Creates a boxed address (jsr/ret address) constant. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
450 * @param i the address value to box |
e233f5660da4
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
451 * @return a boxed copy of {@code value} |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
452 */ |
5501
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|
453 public static RiConstant forJsr(int i) { |
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Renaming CiConstant => RiConstant.
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|
454 return new RiConstant(CiKind.Jsr, i); |
3733
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parents:
diff
changeset
|
455 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
456 |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
457 /** |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
458 * Creates a boxed object constant. |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
459 * @param o the object value to box |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
460 * @return a boxed copy of {@code value} |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
461 */ |
5501
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|
462 public static RiConstant forObject(Object o) { |
3733
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parents:
diff
changeset
|
463 if (o == null) { |
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parents:
diff
changeset
|
464 return NULL_OBJECT; |
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parents:
diff
changeset
|
465 } |
5501
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|
466 return new RiConstant(CiKind.Object, o); |
3733
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parents:
diff
changeset
|
467 } |
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parents:
diff
changeset
|
468 |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
469 /** |
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parents:
diff
changeset
|
470 * Creates a boxed constant for the given kind from an Object. |
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parents:
diff
changeset
|
471 * The object needs to be of the Java boxed type corresponding to the kind. |
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parents:
diff
changeset
|
472 * @param kind the kind of the constant to create |
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parents:
diff
changeset
|
473 * @param value the Java boxed value: a Byte instance for CiKind Byte, etc. |
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parents:
diff
changeset
|
474 * @return the boxed copy of {@code value} |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
475 */ |
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|
476 public static RiConstant forBoxed(CiKind kind, Object value) { |
3733
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parents:
diff
changeset
|
477 switch (kind) { |
5428
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added support for snippet templates which are snippet graphs specialized by binding a constant to at least one of the snippet's parameters
Doug Simon <doug.simon@oracle.com>
parents:
4199
diff
changeset
|
478 case Boolean: |
6ec0857cdf46
added support for snippet templates which are snippet graphs specialized by binding a constant to at least one of the snippet's parameters
Doug Simon <doug.simon@oracle.com>
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4199
diff
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|
479 return forBoolean((Boolean) value); |
3733
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diff
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|
480 case Byte: |
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parents:
diff
changeset
|
481 return forByte((Byte) value); |
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parents:
diff
changeset
|
482 case Char: |
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parents:
diff
changeset
|
483 return forChar((Character) value); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
484 case Short: |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
485 return forShort((Short) value); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
486 case Int: |
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parents:
diff
changeset
|
487 return forInt((Integer) value); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
488 case Long: |
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parents:
diff
changeset
|
489 return forLong((Long) value); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
490 case Float: |
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parents:
diff
changeset
|
491 return forFloat((Float) value); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
492 case Double: |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
493 return forDouble((Double) value); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
494 case Object: |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
495 return forObject(value); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
496 default: |
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parents:
diff
changeset
|
497 throw new RuntimeException("cannot create CiConstant for boxed " + kind + " value"); |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
498 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
499 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
500 } |