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annotate graal/com.oracle.max.graal.compiler/src/com/oracle/max/graal/compiler/util/Util.java @ 2874:d90bf514d647

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Renamed packages.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 08 Jun 2011 08:59:54 +0200
parents graal/com.oracle.max.graal.compiler/src/com/sun/c1x/util/Util.java@0341b6424579
children 224412c24426
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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.oracle.max.graal.compiler.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.oracle.max.graal.compiler.*;
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28 import com.oracle.max.graal.compiler.debug.*;
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29 import com.oracle.max.graal.compiler.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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diff changeset
260
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diff changeset
261 /**
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262 * Prints entries in a byte array as space separated hex values to {@link TTY}.
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diff changeset
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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diff changeset
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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diff changeset
269 */
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270 public static void printBytes(long address, byte[] array, int offset, int length, int bytesPerLine) {
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diff changeset
271 assert bytesPerLine > 0;
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diff changeset
272 boolean newLine = true;
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diff changeset
273 for (int i = 0; i < length; i++) {
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diff changeset
274 if (newLine) {
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275 TTY.print("%08x: ", address + i);
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276 newLine = false;
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diff changeset
277 }
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278 TTY.print("%02x ", array[i]);
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diff changeset
279 if (i % bytesPerLine == bytesPerLine - 1) {
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280 TTY.println();
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281 newLine = true;
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diff changeset
282 }
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283 }
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diff changeset
284
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285 if (length % bytesPerLine != bytesPerLine) {
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diff changeset
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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parents:
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414 }
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parents:
diff changeset
415
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Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
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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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parents:
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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) {
2768
43ffa0e47a46 Towards removing stateAfter on BlockEnd.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents: 2651
diff changeset
425 return (value == null) ? "-" : ("" + value.kind.typeChar + value.id());
2507
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426 }
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Thomas Wuerthinger <thomas@wuerthinger.net>
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427 }