Mercurial > hg > graal-jvmci-8
annotate graal/GraalCompiler/src/com/sun/c1x/util/Util.java @ 2651:f9ae687657e8
Removed unused FatalNonUnimplemented flag and methods.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 11 May 2011 14:45:05 +0200 |
parents | 16b9a8b5ad39 |
children | 43ffa0e47a46 |
rev | line source |
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1 /* |
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2 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.sun.c1x.util; |
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24 |
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25 import java.util.*; |
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26 |
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27 import com.sun.c1x.*; |
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28 import com.sun.c1x.debug.*; |
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29 import com.sun.c1x.ir.*; |
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30 import com.sun.cri.ci.*; |
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31 import com.sun.cri.ri.*; |
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32 |
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33 /** |
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34 * The {@code Util} class contains a motley collection of utility methods used throughout the compiler. |
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35 * |
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36 * @author Ben L. Titzer |
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37 * @author Doug Simon |
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38 */ |
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39 public class Util { |
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40 |
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41 public static final int PRINTING_LINE_WIDTH = 40; |
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42 public static final char SECTION_CHARACTER = '*'; |
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43 public static final char SUB_SECTION_CHARACTER = '='; |
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44 public static final char SEPERATOR_CHARACTER = '-'; |
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45 |
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46 public static RuntimeException unimplemented() { |
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47 throw new InternalError("unimplemented"); |
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48 } |
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49 |
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50 public static RuntimeException unimplemented(String msg) { |
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51 throw new InternalError("unimplemented:" + msg); |
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52 } |
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53 |
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54 public static RuntimeException shouldNotReachHere() { |
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55 throw new InternalError("should not reach here"); |
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56 } |
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57 |
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58 public static RuntimeException shouldNotReachHere(String msg) { |
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59 throw new InternalError("Should not reach here: " + msg); |
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60 } |
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61 |
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62 public static <T> boolean replaceInList(T a, T b, List<T> list) { |
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63 final int max = list.size(); |
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64 for (int i = 0; i < max; i++) { |
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65 if (list.get(i) == a) { |
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66 list.set(i, b); |
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67 return true; |
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68 } |
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69 } |
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70 return false; |
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71 } |
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72 |
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73 public static <T> boolean replaceAllInList(T a, T b, List<T> list) { |
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74 final int max = list.size(); |
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75 for (int i = 0; i < max; i++) { |
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76 if (list.get(i) == a) { |
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77 list.set(i, b); |
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78 } |
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79 } |
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80 return false; |
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81 } |
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82 |
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83 /** |
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84 * Statically cast an object to an arbitrary Object type. Dynamically checked. |
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85 */ |
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86 @SuppressWarnings("unchecked") |
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87 public static <T> T uncheckedCast(Class<T> type, Object object) { |
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88 return (T) object; |
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89 } |
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90 |
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91 /** |
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92 * Statically cast an object to an arbitrary Object type. Dynamically checked. |
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93 */ |
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94 @SuppressWarnings("unchecked") |
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95 public static <T> T uncheckedCast(Object object) { |
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96 return (T) object; |
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97 } |
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98 |
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99 /** |
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100 * Utility method to combine a base hash with the identity hash of one or more objects. |
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101 * |
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102 * @param hash the base hash |
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103 * @param x the object to add to the hash |
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104 * @return the combined hash |
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105 */ |
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106 public static int hash1(int hash, Object x) { |
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107 // always set at least one bit in case the hash wraps to zero |
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108 return 0x10000000 | (hash + 7 * System.identityHashCode(x)); |
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109 } |
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110 |
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111 /** |
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112 * Utility method to combine a base hash with the identity hash of one or more objects. |
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113 * |
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114 * @param hash the base hash |
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115 * @param x the first object to add to the hash |
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116 * @param y the second object to add to the hash |
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117 * @return the combined hash |
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118 */ |
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119 public static int hash2(int hash, Object x, Object y) { |
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120 // always set at least one bit in case the hash wraps to zero |
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121 return 0x20000000 | (hash + 7 * System.identityHashCode(x) + 11 * System.identityHashCode(y)); |
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122 } |
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123 |
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124 /** |
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125 * Utility method to combine a base hash with the identity hash of one or more objects. |
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126 * |
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127 * @param hash the base hash |
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128 * @param x the first object to add to the hash |
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129 * @param y the second object to add to the hash |
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130 * @param z the third object to add to the hash |
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131 * @return the combined hash |
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132 */ |
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133 public static int hash3(int hash, Object x, Object y, Object z) { |
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134 // always set at least one bit in case the hash wraps to zero |
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135 return 0x30000000 | (hash + 7 * System.identityHashCode(x) + 11 * System.identityHashCode(y) + 13 * System.identityHashCode(z)); |
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136 } |
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137 |
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138 /** |
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139 * Utility method to combine a base hash with the identity hash of one or more objects. |
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140 * |
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141 * @param hash the base hash |
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142 * @param x the first object to add to the hash |
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143 * @param y the second object to add to the hash |
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144 * @param z the third object to add to the hash |
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145 * @param w the fourth object to add to the hash |
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146 * @return the combined hash |
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147 */ |
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148 public static int hash4(int hash, Object x, Object y, Object z, Object w) { |
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149 // always set at least one bit in case the hash wraps to zero |
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150 return 0x40000000 | (hash + 7 * System.identityHashCode(x) + 11 * System.identityHashCode(y) + 13 * System.identityHashCode(z) + 17 * System.identityHashCode(w)); |
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151 } |
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152 |
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153 static { |
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154 assert CiUtil.log2(2) == 1; |
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155 assert CiUtil.log2(4) == 2; |
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156 assert CiUtil.log2(8) == 3; |
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157 assert CiUtil.log2(16) == 4; |
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158 assert CiUtil.log2(32) == 5; |
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159 assert CiUtil.log2(0x40000000) == 30; |
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160 |
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161 assert CiUtil.log2(2L) == 1; |
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162 assert CiUtil.log2(4L) == 2; |
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163 assert CiUtil.log2(8L) == 3; |
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164 assert CiUtil.log2(16L) == 4; |
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165 assert CiUtil.log2(32L) == 5; |
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166 assert CiUtil.log2(0x4000000000000000L) == 62; |
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167 |
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168 assert !CiUtil.isPowerOf2(3); |
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169 assert !CiUtil.isPowerOf2(5); |
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170 assert !CiUtil.isPowerOf2(7); |
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171 assert !CiUtil.isPowerOf2(-1); |
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172 |
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173 assert CiUtil.isPowerOf2(2); |
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174 assert CiUtil.isPowerOf2(4); |
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175 assert CiUtil.isPowerOf2(8); |
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176 assert CiUtil.isPowerOf2(16); |
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177 assert CiUtil.isPowerOf2(32); |
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178 assert CiUtil.isPowerOf2(64); |
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179 } |
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180 |
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181 /** |
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182 * Sets the element at a given position of a list and ensures that this position exists. If the list is current |
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183 * shorter than the position, intermediate positions are filled with a given value. |
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184 * |
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185 * @param list the list to put the element into |
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186 * @param pos the position at which to insert the element |
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187 * @param x the element that should be inserted |
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188 * @param filler the filler element that is used for the intermediate positions in case the list is shorter than pos |
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189 */ |
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190 public static <T> void atPutGrow(List<T> list, int pos, T x, T filler) { |
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191 if (list.size() < pos + 1) { |
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192 while (list.size() < pos + 1) { |
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193 list.add(filler); |
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194 } |
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195 assert list.size() == pos + 1; |
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196 } |
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197 |
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198 assert list.size() >= pos + 1; |
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199 list.set(pos, x); |
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200 } |
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201 |
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202 public static void breakpoint() { |
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203 // do nothing. |
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204 } |
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205 |
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206 public static void guarantee(boolean b, String string) { |
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207 if (!b) { |
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208 throw new CiBailout(string); |
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209 } |
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210 } |
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211 |
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212 public static void warning(String string) { |
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213 TTY.println("WARNING: " + string); |
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214 } |
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215 |
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216 public static int safeToInt(long l) { |
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217 assert (int) l == l; |
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218 return (int) l; |
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219 } |
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220 |
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221 public static int roundUp(int number, int mod) { |
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222 return ((number + mod - 1) / mod) * mod; |
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223 } |
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224 |
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225 public static void truncate(List<?> list, int length) { |
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226 while (list.size() > length) { |
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227 list.remove(list.size() - 1); |
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228 } |
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229 } |
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230 |
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231 public static void printSection(String name, char sectionCharacter) { |
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232 |
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233 String header = " " + name + " "; |
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234 int remainingCharacters = PRINTING_LINE_WIDTH - header.length(); |
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235 int leftPart = remainingCharacters / 2; |
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236 int rightPart = remainingCharacters - leftPart; |
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237 for (int i = 0; i < leftPart; i++) { |
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238 TTY.print(sectionCharacter); |
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239 } |
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240 |
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241 TTY.print(header); |
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242 |
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243 for (int i = 0; i < rightPart; i++) { |
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244 TTY.print(sectionCharacter); |
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245 } |
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246 |
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247 TTY.println(); |
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248 } |
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249 |
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250 /** |
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251 * Prints entries in a byte array as space separated hex values to {@link TTY}. |
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252 * |
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253 * @param address an address at which the bytes are located. This is used to print an address prefix per line of output. |
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254 * @param array the array containing all the bytes to print |
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255 * @param bytesPerLine the number of values to print per line of output |
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256 */ |
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257 public static void printBytes(long address, byte[] array, int bytesPerLine) { |
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258 printBytes(address, array, 0, array.length, bytesPerLine); |
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259 } |
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260 |
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261 /** |
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262 * Prints entries in a byte array as space separated hex values to {@link TTY}. |
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263 * |
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264 * @param address an address at which the bytes are located. This is used to print an address prefix per line of output. |
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265 * @param array the array containing the bytes to print |
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266 * @param offset the offset in {@code array} of the values to print |
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267 * @param length the number of values from {@code array} print |
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268 * @param bytesPerLine the number of values to print per line of output |
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269 */ |
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270 public static void printBytes(long address, byte[] array, int offset, int length, int bytesPerLine) { |
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271 assert bytesPerLine > 0; |
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272 boolean newLine = true; |
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273 for (int i = 0; i < length; i++) { |
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274 if (newLine) { |
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275 TTY.print("%08x: ", address + i); |
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276 newLine = false; |
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277 } |
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278 TTY.print("%02x ", array[i]); |
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279 if (i % bytesPerLine == bytesPerLine - 1) { |
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280 TTY.println(); |
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281 newLine = true; |
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282 } |
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283 } |
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284 |
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285 if (length % bytesPerLine != bytesPerLine) { |
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286 TTY.println(); |
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287 } |
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288 } |
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289 |
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290 public static CiKind[] signatureToKinds(RiSignature signature, CiKind receiverKind) { |
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291 int args = signature.argumentCount(false); |
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292 CiKind[] result; |
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293 int i = 0; |
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294 if (receiverKind != null) { |
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295 result = new CiKind[args + 1]; |
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296 result[0] = receiverKind; |
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297 i = 1; |
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298 } else { |
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299 result = new CiKind[args]; |
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300 } |
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301 for (int j = 0; j < args; j++) { |
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302 result[i + j] = signature.argumentKindAt(j); |
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303 } |
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304 return result; |
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305 } |
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306 |
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307 public static boolean isShiftCount(int x) { |
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308 return 0 <= x && x < 32; |
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309 } |
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310 |
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311 /** |
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312 * Determines if a given {@code int} value is the range of unsigned byte values. |
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313 */ |
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314 public static boolean isUByte(int x) { |
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315 return (x & 0xff) == x; |
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316 } |
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317 |
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318 /** |
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319 * Determines if a given {@code int} value is the range of signed byte values. |
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320 */ |
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321 public static boolean isByte(int x) { |
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322 return (byte) x == x; |
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323 } |
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324 |
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325 /** |
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326 * Determines if a given {@code long} value is the range of unsigned byte values. |
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327 */ |
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328 public static boolean isUByte(long x) { |
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329 return (x & 0xffL) == x; |
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330 } |
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331 |
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332 /** |
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333 * Determines if a given {@code long} value is the range of signed byte values. |
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334 */ |
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335 public static boolean isByte(long l) { |
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336 return (byte) l == l; |
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337 } |
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338 |
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339 /** |
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340 * Determines if a given {@code long} value is the range of unsigned int values. |
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341 */ |
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342 public static boolean isUInt(long x) { |
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343 return (x & 0xffffffffL) == x; |
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344 } |
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345 |
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346 /** |
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347 * Determines if a given {@code long} value is the range of signed int values. |
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348 */ |
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349 public static boolean isInt(long l) { |
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350 return (int) l == l; |
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351 } |
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352 /** |
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353 * Determines if a given {@code int} value is the range of signed short values. |
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354 */ |
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355 public static boolean isShort(int x) { |
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356 return (short) x == x; |
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357 } |
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358 |
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359 public static boolean is32bit(long x) { |
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360 return -0x80000000L <= x && x < 0x80000000L; |
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361 } |
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362 |
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363 public static short safeToShort(int v) { |
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364 assert isShort(v); |
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365 return (short) v; |
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366 } |
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367 |
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368 /** |
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369 * Determines if the kinds of two given IR nodes are equal at the {@linkplain #archKind(CiKind) architecture} |
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370 * level in the context of the {@linkplain C1XCompilation#compilation()} compilation. |
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371 */ |
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372 public static boolean archKindsEqual(Value i, Value other) { |
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373 return archKindsEqual(i.kind, other.kind); |
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374 } |
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375 |
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376 /** |
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377 * Determines if two given kinds are equal at the {@linkplain #archKind(CiKind) architecture} level |
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378 * in the context of the {@linkplain C1XCompilation#compilation()} compilation. |
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379 */ |
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380 public static boolean archKindsEqual(CiKind k1, CiKind k2) { |
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381 C1XCompilation compilation = C1XCompilation.compilation(); |
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382 assert compilation != null : "missing compilation context"; |
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383 return compilation.archKindsEqual(k1, k2); |
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384 } |
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385 |
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386 /** |
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387 * Translates a given kind to a {@linkplain C1XCompilation#archKind(CiKind) canonical architecture} |
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388 * kind in the context of the {@linkplain C1XCompilation#compilation() current} compilation. |
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389 */ |
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390 public static CiKind archKind(CiKind kind) { |
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391 C1XCompilation compilation = C1XCompilation.compilation(); |
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392 assert compilation != null : "missing compilation context"; |
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393 return compilation.archKind(kind); |
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394 } |
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395 |
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396 |
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397 /** |
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398 * Checks that two instructions are equivalent, optionally comparing constants. |
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399 * @param x the first instruction |
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400 * @param y the second instruction |
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401 * @param compareConstants {@code true} if equivalent constants should be considered equivalent |
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402 * @return {@code true} if the instructions are equivalent; {@code false} otherwise |
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403 */ |
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404 public static boolean equivalent(Instruction x, Instruction y, boolean compareConstants) { |
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405 if (x == y) { |
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406 return true; |
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407 } |
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408 if (compareConstants && x != null && y != null) { |
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409 if (x.isConstant() && x.asConstant().equivalent(y.asConstant())) { |
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410 return true; |
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411 } |
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412 } |
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413 return false; |
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414 } |
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415 |
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416 /** |
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417 * Converts a given instruction to a value string. The representation of an instruction as |
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418 * a value is formed by concatenating the {@linkplain com.sun.cri.ci.CiKind#typeChar character} denoting its |
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419 * {@linkplain Value#kind kind} and its {@linkplain Value#id()}. For example, {@code "i13"}. |
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420 * |
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421 * @param value the instruction to convert to a value string. If {@code value == null}, then "-" is returned. |
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422 * @return the instruction representation as a string |
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423 */ |
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424 public static String valueString(Value value) { |
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425 return value == null ? "-" : "" + value.kind.typeChar + value.id(); |
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426 } |
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427 } |