Mercurial > hg > truffle

annotate graal/com.oracle.max.cri/src/com/sun/cri/ci/CiValue.java @ 4142:bc8527f3071c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Adjust code base to new level of warnings.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sun, 18 Dec 2011 05:24:06 +0100
parents e233f5660da4
children f5328dda9714
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1 /*
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2 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.sun.cri.ci;
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24
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25 import java.io.*;
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28
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29 /**
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30 * Abstract base class for values manipulated by the compiler. All values have a {@linkplain CiKind kind} and are immutable.
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31 */
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32 public abstract class CiValue implements Serializable {
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33 private static final long serialVersionUID = -6909397188697766469L;
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34
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35 @SuppressWarnings("serial")
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36 public static CiValue IllegalValue = new CiValue(CiKind.Illegal) {
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37 @Override
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38 public String name() {
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39 return "<illegal>";
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40 }
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41 @Override
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42 public CiRegister asRegister() {
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43 return CiRegister.None;
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44 }
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45 @Override
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46 public int hashCode() {
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47 return -1;
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48 }
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49 @Override
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50 public boolean equals(Object obj) {
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51 return obj == this;
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52 }
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53 @Override
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54 public boolean equalsIgnoringKind(CiValue other) {
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55 return other == this;
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56 }
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57 };
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58
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59 /**
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60 * The kind of this value.
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61 */
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62 public final CiKind kind;
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63
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64 /**
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65 * Initializes a new value of the specified kind.
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66 * @param kind the kind
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67 */
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68 protected CiValue(CiKind kind) {
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69 this.kind = kind;
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70 }
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71
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72 public final boolean isVariableOrRegister() {
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73 return this instanceof CiVariable || this instanceof CiRegisterValue;
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74 }
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75
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76 public CiRegister asRegister() {
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77 throw new InternalError("Not a register: " + this);
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78 }
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79
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80 public final boolean isIllegal() {
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81 return this == IllegalValue;
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82 }
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83
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84 public final boolean isLegal() {
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85 return this != IllegalValue;
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86 }
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87
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88 /**
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89 * Determines if this value represents a slot on a stack. These values are created
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90 * by the register allocator for spill slots. They are also used to model method
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91 * parameters passed on the stack according to a specific calling convention.
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92 */
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93 public final boolean isStackSlot() {
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94 return this instanceof CiStackSlot;
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95 }
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96
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97 public final boolean isRegister() {
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98 return this instanceof CiRegisterValue;
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99 }
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100
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101 public final boolean isVariable() {
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102 return this instanceof CiVariable;
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103 }
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104
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105 public final boolean isAddress() {
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106 return this instanceof CiAddress;
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107 }
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108
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109 public final boolean isConstant() {
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110 return this instanceof CiConstant;
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111 }
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112
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113 /**
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114 * Gets a string name for this value without indicating its {@linkplain #kind kind}.
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115 */
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116 public abstract String name();
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117
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118 @Override
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119 public abstract boolean equals(Object obj);
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120
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121 public abstract boolean equalsIgnoringKind(CiValue other);
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122
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123 @Override
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124 public abstract int hashCode();
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125
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126 @Override
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127 public final String toString() {
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128 return name() + kindSuffix();
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129 }
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130
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131 public final String kindSuffix() {
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132 if (kind == CiKind.Illegal) {
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133 return "";
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134 }
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135 return ":" + kind.typeChar;
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136 }
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137
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138 public final boolean isConstant0() {
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139 return isConstant() && ((CiConstant) this).asInt() == 0;
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140 }
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141
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142 /**
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143 * Utility for specializing how a {@linkplain CiValue LIR operand} is formatted to a string.
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144 * The {@linkplain Formatter#DEFAULT default formatter} returns the value of
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145 * {@link CiValue#toString()}.
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146 */
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147 public static class Formatter {
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148 public static final Formatter DEFAULT = new Formatter();
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149
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150 /**
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151 * Formats a given operand as a string.
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152 *
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153 * @param operand the operand to format
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154 * @return {@code operand} as a string
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155 */
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156 public String format(CiValue operand) {
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157 return operand.toString();
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158 }
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159 }
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160
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161 }