annotate graal/com.oracle.graal.api.meta/src/com/oracle/graal/api/meta/Constant.java @ 7300:2912b72d840a

More complete and reusable Word type
author Christian Wimmer <christian.wimmer@oracle.com>
date Fri, 04 Jan 2013 12:08:11 -0800
parents f1f32b695d1e
children 5e3d1a68664e
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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.graal.api.meta;
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24
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25 /**
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26 * Represents a constant (boxed) value, such as an integer, floating point number, or object reference, within the
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27 * compiler and across the compiler/runtime interface. Exports a set of {@code Constant} instances that represent
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28 * frequently used constant values, such as {@link #NULL_OBJECT}.
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29 */
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30 public final class Constant extends Value {
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31
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32 private static final long serialVersionUID = -6355452536852663986L;
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33
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34 private static final Constant[] INT_CONSTANT_CACHE = new Constant[100];
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35 static {
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36 for (int i = 0; i < INT_CONSTANT_CACHE.length; ++i) {
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37 INT_CONSTANT_CACHE[i] = new Constant(Kind.Int, null, i);
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38 }
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39 }
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40
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41 public static final Constant NULL_OBJECT = new Constant(Kind.Object, null, 0);
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42 public static final Constant INT_MINUS_1 = new Constant(Kind.Int, null, -1);
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43 public static final Constant INT_0 = forInt(0);
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44 public static final Constant INT_1 = forInt(1);
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45 public static final Constant INT_2 = forInt(2);
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46 public static final Constant INT_3 = forInt(3);
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47 public static final Constant INT_4 = forInt(4);
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48 public static final Constant INT_5 = forInt(5);
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49 public static final Constant LONG_0 = new Constant(Kind.Long, null, 0L);
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50 public static final Constant LONG_1 = new Constant(Kind.Long, null, 1L);
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51 public static final Constant FLOAT_0 = new Constant(Kind.Float, null, Float.floatToRawIntBits(0.0F));
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52 public static final Constant FLOAT_1 = new Constant(Kind.Float, null, Float.floatToRawIntBits(1.0F));
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53 public static final Constant FLOAT_2 = new Constant(Kind.Float, null, Float.floatToRawIntBits(2.0F));
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54 public static final Constant DOUBLE_0 = new Constant(Kind.Double, null, Double.doubleToRawLongBits(0.0D));
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55 public static final Constant DOUBLE_1 = new Constant(Kind.Double, null, Double.doubleToRawLongBits(1.0D));
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56 public static final Constant TRUE = new Constant(Kind.Boolean, null, 1L);
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57 public static final Constant FALSE = new Constant(Kind.Boolean, null, 0L);
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58
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59 static {
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60 assert FLOAT_0 != forFloat(-0.0F) : "Constant for 0.0f must be different from -0.0f";
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61 assert DOUBLE_0 != forDouble(-0.0d) : "Constant for 0.0d must be different from -0.0d";
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62 assert NULL_OBJECT.isNull();
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63 }
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64
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65 /**
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66 * The boxed object value if {@code !kind.isObject()} otherwise the (possibly null)
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67 * {@link #getPrimitiveAnnotation() annotation} for a primitive value.
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68 */
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69 private final Object object;
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70
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71 /**
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72 * The boxed primitive value as a {@code long}. This is ignored iff {@code kind.isObject()}. For {@code float} and
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73 * {@code double} values, this value is the result of {@link Float#floatToRawIntBits(float)} and
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74 * {@link Double#doubleToRawLongBits(double)} respectively.
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75 */
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76 private final long primitive;
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77
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78 private Constant(Kind kind, Object object, long primitive) {
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79 super(kind);
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80 this.object = object;
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81 this.primitive = primitive;
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82 }
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83
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84 /**
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85 * Checks whether this constant is non-null.
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86 *
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87 * @return {@code true} if this constant is a primitive, or an object constant that is not null
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88 */
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89 public boolean isNonNull() {
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90 return getKind() != Kind.Object || object != null;
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91 }
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92
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93 /**
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94 * Checks whether this constant is null.
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95 *
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96 * @return {@code true} if this constant is the null constant
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97 */
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98 public boolean isNull() {
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99 return getKind() == Kind.Object && object == null;
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100 }
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101
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102 /**
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103 * Checks whether this constant is the default value for its kind (null, 0, 0.0, false).
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104 *
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105 * @return {@code true} if this constant is the default value for its kind
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106 */
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107 public boolean isDefaultForKind() {
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108 return object == null && primitive == 0;
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109 }
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110
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111 @Override
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112 public String toString() {
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113 String annotationSuffix = "";
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114 if (getKind() != Kind.Object && getPrimitiveAnnotation() != null) {
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115 annotationSuffix = "{" + getPrimitiveAnnotation() + "}";
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116 }
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117 return getKind().getJavaName() + "[" + getKind().format(asBoxedValue()) + (getKind() != Kind.Object ? "|0x" + Long.toHexString(primitive) : "") + "]" + annotationSuffix;
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118 }
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119
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120 /**
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121 * Returns the value of this constant as a boxed Java value.
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122 *
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123 * @return the value of this constant
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124 */
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125 public Object asBoxedValue() {
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126 switch (getKind()) {
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127 case Byte:
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128 return (byte) asInt();
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129 case Boolean:
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130 return asInt() == 0 ? Boolean.FALSE : Boolean.TRUE;
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131 case Short:
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132 return (short) primitive;
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133 case Char:
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134 return (char) primitive;
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135 case Jsr:
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136 return (int) primitive;
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137 case Int:
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138 return (int) primitive;
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139 case Long:
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140 return primitive;
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141 case Float:
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142 return asFloat();
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143 case Double:
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144 return asDouble();
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145 case Object:
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146 return object;
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147 }
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148 throw new IllegalArgumentException();
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149 }
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150
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151 private boolean valueEqual(Constant other, boolean ignoreKind) {
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152 // must have equivalent kinds to be equal
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153 if (!ignoreKind && getKind() != other.getKind()) {
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154 return false;
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155 }
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156 if (getKind() == Kind.Object) {
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157 return object == other.object;
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158 }
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159 return primitive == other.primitive && getPrimitiveAnnotation() == other.getPrimitiveAnnotation();
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160 }
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161
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162 /**
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163 * Returns the primitive int value this constant represents. The constant must have a {@link Kind#getStackKind()} of
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164 * {@link Kind#Int}, or kind {@link Kind#Jsr}.
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165 *
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166 * @return the constant value
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167 */
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168 public int asInt() {
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169 assert getKind().getStackKind() == Kind.Int || getKind() == Kind.Jsr;
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170 return (int) primitive;
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171 }
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172
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173 /**
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174 * Returns the primitive boolean value this constant represents. The constant must have kind {@link Kind#Boolean}.
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175 *
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176 * @return the constant value
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177 */
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178 public boolean asBoolean() {
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179 assert getKind() == Kind.Boolean;
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180 return primitive != 0L;
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181 }
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182
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183 /**
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184 * Returns the primitive long value this constant represents. The constant must have kind {@link Kind#Long}, a
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185 * {@link Kind#getStackKind()} of {@link Kind#Int}, or kind {@link Kind#Jsr}.
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186 *
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187 * @return the constant value
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188 */
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189 public long asLong() {
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190 assert getKind() == Kind.Long || getKind().getStackKind() == Kind.Int || getKind() == Kind.Jsr;
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191 return primitive;
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192 }
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193
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194 /**
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195 * Returns the primitive float value this constant represents. The constant must have kind {@link Kind#Float}.
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196 *
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197 * @return the constant value
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198 */
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199 public float asFloat() {
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200 assert getKind() == Kind.Float;
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201 return Float.intBitsToFloat((int) primitive);
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202 }
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203
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204 /**
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205 * Returns the primitive double value this constant represents. The constant must have kind {@link Kind#Double}.
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206 *
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207 * @return the constant value
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208 */
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209 public double asDouble() {
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210 assert getKind() == Kind.Double;
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211 return Double.longBitsToDouble(primitive);
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212 }
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213
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214 /**
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215 * Returns the object reference this constant represents. The constant must have kind {@link Kind#Object}.
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216 *
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217 * @return the constant value
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218 */
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219 public Object asObject() {
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220 assert getKind() == Kind.Object;
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221 return object;
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222 }
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223
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224 /**
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225 * Gets the annotation (if any) associated with this constant.
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226 *
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227 * @return null if this constant is not primitive or has no annotation
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228 */
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229 public Object getPrimitiveAnnotation() {
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230 return getKind() == Kind.Object ? null : object;
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231 }
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232
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233 /**
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234 * Computes the hashcode of this constant.
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235 *
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236 * @return a suitable hashcode for this constant
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237 */
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238 @Override
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239 public int hashCode() {
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240 if (getKind() == Kind.Object) {
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241 return System.identityHashCode(object);
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242 }
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243 return (int) primitive;
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244 }
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245
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246 /**
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247 * Checks whether this constant equals another object. This is only true if the other object is a constant that has
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248 * the same {@linkplain #getKind() kind}, value and {@link #getPrimitiveAnnotation() annotation}.
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249 *
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250 * @param o the object to compare equality
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251 * @return {@code true} if this constant is equivalent to the specified object
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252 */
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253 @Override
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254 public boolean equals(Object o) {
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diff changeset
255 return o == this || o instanceof Constant && valueEqual((Constant) o, false);
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256 }
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257
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258 /**
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259 * Creates a boxed double constant.
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260 *
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261 * @param d the double value to box
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262 * @return a boxed copy of {@code value}
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263 */
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264 public static Constant forDouble(double d) {
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265 if (Double.compare(0.0D, d) == 0) {
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266 return DOUBLE_0;
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267 }
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268 if (Double.compare(d, 1.0D) == 0) {
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269 return DOUBLE_1;
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270 }
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271 return new Constant(Kind.Double, null, Double.doubleToRawLongBits(d));
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272 }
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273
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274 /**
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275 * Creates a boxed float constant.
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276 *
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277 * @param f the float value to box
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278 * @return a boxed copy of {@code value}
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279 */
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280 public static Constant forFloat(float f) {
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281 if (Float.compare(f, 0.0F) == 0) {
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282 return FLOAT_0;
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283 }
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284 if (Float.compare(f, 1.0F) == 0) {
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285 return FLOAT_1;
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286 }
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diff changeset
287 if (Float.compare(f, 2.0F) == 0) {
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288 return FLOAT_2;
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289 }
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290 return new Constant(Kind.Float, null, Float.floatToRawIntBits(f));
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291 }
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292
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diff changeset
293 /**
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294 * Creates a boxed long constant.
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295 *
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296 * @param i the long value to box
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297 * @return a boxed copy of {@code value}
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298 */
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299 public static Constant forLong(long i) {
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300 return i == 0 ? LONG_0 : i == 1 ? LONG_1 : new Constant(Kind.Long, null, i);
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301 }
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302
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303 /**
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304 * Creates a boxed integer constant.
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305 *
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306 * @param i the integer value to box
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307 * @return a boxed copy of {@code value}
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diff changeset
308 */
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diff changeset
309 public static Constant forInt(int i) {
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diff changeset
310 if (i == -1) {
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diff changeset
311 return INT_MINUS_1;
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312 }
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diff changeset
313 if (i >= 0 && i < INT_CONSTANT_CACHE.length) {
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314 return INT_CONSTANT_CACHE[i];
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diff changeset
315 }
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diff changeset
316 return new Constant(Kind.Int, null, i);
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317 }
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318
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diff changeset
319 /**
e233f5660da4 Added Java files from Maxine project.
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320 * Creates a boxed byte constant.
6994
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diff changeset
321 *
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322 * @param i the byte value to box
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diff changeset
323 * @return a boxed copy of {@code value}
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diff changeset
324 */
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diff changeset
325 public static Constant forByte(byte i) {
7105
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
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diff changeset
326 return new Constant(Kind.Byte, null, i);
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diff changeset
327 }
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diff changeset
328
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diff changeset
329 /**
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diff changeset
330 * Creates a boxed boolean constant.
6994
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diff changeset
331 *
3733
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332 * @param i the boolean value to box
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diff changeset
333 * @return a boxed copy of {@code value}
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diff changeset
334 */
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diff changeset
335 public static Constant forBoolean(boolean i) {
3733
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diff changeset
336 return i ? TRUE : FALSE;
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diff changeset
337 }
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diff changeset
338
e233f5660da4 Added Java files from Maxine project.
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parents:
diff changeset
339 /**
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parents:
diff changeset
340 * Creates a boxed char constant.
6994
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diff changeset
341 *
3733
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diff changeset
342 * @param i the char value to box
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parents:
diff changeset
343 * @return a boxed copy of {@code value}
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diff changeset
344 */
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diff changeset
345 public static Constant forChar(char i) {
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diff changeset
346 return new Constant(Kind.Char, null, i);
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diff changeset
347 }
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diff changeset
348
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diff changeset
349 /**
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diff changeset
350 * Creates a boxed short constant.
6994
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diff changeset
351 *
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diff changeset
352 * @param i the short value to box
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parents:
diff changeset
353 * @return a boxed copy of {@code value}
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parents:
diff changeset
354 */
5538
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diff changeset
355 public static Constant forShort(short i) {
7105
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diff changeset
356 return new Constant(Kind.Short, null, i);
3733
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diff changeset
357 }
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parents:
diff changeset
358
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parents:
diff changeset
359 /**
e233f5660da4 Added Java files from Maxine project.
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parents:
diff changeset
360 * Creates a boxed address (jsr/ret address) constant.
6994
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diff changeset
361 *
3733
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diff changeset
362 * @param i the address value to box
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parents:
diff changeset
363 * @return a boxed copy of {@code value}
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parents:
diff changeset
364 */
5538
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diff changeset
365 public static Constant forJsr(int i) {
7105
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diff changeset
366 return new Constant(Kind.Jsr, null, i);
3733
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diff changeset
367 }
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parents:
diff changeset
368
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parents:
diff changeset
369 /**
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parents:
diff changeset
370 * Creates a boxed object constant.
6994
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parents: 6708
diff changeset
371 *
3733
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diff changeset
372 * @param o the object value to box
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parents:
diff changeset
373 * @return a boxed copy of {@code value}
e233f5660da4 Added Java files from Maxine project.
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parents:
diff changeset
374 */
5538
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diff changeset
375 public static Constant forObject(Object o) {
3733
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parents:
diff changeset
376 if (o == null) {
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
377 return NULL_OBJECT;
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
378 }
7105
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
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parents: 7103
diff changeset
379 return new Constant(Kind.Object, o, 0L);
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
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parents: 7103
diff changeset
380 }
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
diff changeset
381
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
diff changeset
382 /**
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
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383 * Creates an annotated int or long constant. An annotation enables a client to associate some extra semantic or
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
diff changeset
384 * debugging information with a primitive. An annotated primitive constant is never {@linkplain #equals(Object)
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
diff changeset
385 * equal} to a non-annotated constant.
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
diff changeset
386 *
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
diff changeset
387 * @param kind the type of this constant
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
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388 * @param i the value of this constant
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
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389 * @param annotation an arbitrary non-null object
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
diff changeset
390 */
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
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391 public static Constant forIntegerKind(Kind kind, long i, Object annotation) {
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
diff changeset
392 switch (kind) {
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
diff changeset
393 case Int:
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
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394 return new Constant(kind, annotation, (int) i);
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
diff changeset
395 case Long:
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
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396 return new Constant(kind, annotation, i);
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
diff changeset
397 default:
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
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398 throw new IllegalArgumentException("not an integer kind: " + kind);
f1f32b695d1e Make constructors of Constant private to ensure proper encapuslation of the type-overloaded primitive field; reduce to one constructor that sets all fields.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7103
diff changeset
399 }
3733
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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400 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
401
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
402 /**
6539
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.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 6329
diff changeset
403 * Creates a boxed constant for the given kind from an Object. The object needs to be of the Java boxed type
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.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 6329
diff changeset
404 * corresponding to the kind.
6994
fd1c171d9969 removed Kind parameter from Constant constructor for an object constant
Doug Simon <doug.simon@oracle.com>
parents: 6708
diff changeset
405 *
3733
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
406 * @param kind the kind of the constant to create
5774
a1db0ea58b53 Removed left over Ci* prefixed identifiers
Doug Simon <doug.simon@oracle.com>
parents: 5711
diff changeset
407 * @param value the Java boxed value: a {@link Byte} instance for {@link Kind#Byte}, etc.
3733
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
408 * @return the boxed copy of {@code value}
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
409 */
5540
a891c53a295b Renaming RiKind => Kind.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 5539
diff changeset
410 public static Constant forBoxed(Kind kind, Object value) {
3733
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
411 switch (kind) {
5428
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>
parents: 4199
diff changeset
412 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>
parents: 4199
diff changeset
413 return forBoolean((Boolean) value);
3733
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
414 case Byte:
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
415 return forByte((Byte) value);
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
416 case Char:
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
417 return forChar((Character) value);
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
418 case Short:
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
419 return forShort((Short) value);
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
420 case Int:
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
421 return forInt((Integer) value);
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
422 case Long:
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
423 return forLong((Long) value);
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
424 case Float:
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
425 return forFloat((Float) value);
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
426 case Double:
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
427 return forDouble((Double) value);
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
428 case Object:
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
429 return forObject(value);
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
430 default:
5572
8f9c9d372e31 small renaming and doc fixes
Lukas Stadler <lukas.stadler@jku.at>
parents: 5543
diff changeset
431 throw new RuntimeException("cannot create Constant for boxed " + kind + " value");
3733
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
432 }
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
433 }
7300
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
434
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
435 /**
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
436 * Returns a constant with the default value for the given kind.
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
437 */
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
438 public static Constant defaultForKind(Kind kind) {
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
439 switch(kind) {
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
440 case Boolean:
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
441 return FALSE;
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
442 case Byte:
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
443 return forByte((byte) 0);
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
444 case Char:
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
445 return forChar((char) 0);
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
446 case Short:
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
447 return forShort((short) 0);
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
448 case Int:
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
449 return INT_0;
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
450 case Double:
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
451 return DOUBLE_0;
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
452 case Float:
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
453 return FLOAT_0;
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
454 case Long:
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
455 return LONG_0;
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
456 case Object:
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
457 return NULL_OBJECT;
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
458 default:
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
459 throw new IllegalArgumentException(kind.toString());
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
460 }
2912b72d840a More complete and reusable Word type
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7105
diff changeset
461 }
3733
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
462 }