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annotate test/compiler/6661247/Test.java @ 3237:399aa66d375e

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Fixed a bug in which the valueEquals method was misused. The method does only check the equality of the node data and not full GVN equality by taking inputs and successors into account.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 27 Jul 2011 14:16:38 -0700
parents c18cbe5936b8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 1997, 2008, 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 */
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24
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25 /*
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26 * @test
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27 * @bug 6661247
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28 * @summary Internal bug in 32-bit HotSpot optimizer while bit manipulations
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29 */
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30
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31 import java.util.Random;
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32 import java.nio.*;
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33
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34 // This isn't a completely reliable test for 6661247 since the results
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35 // depend on what the local schedule looks like but it does reproduce
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36 // the issue in current builds.
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37
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38 public class Test {
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40 public static void test(boolean[] src, int srcPos, LongBuffer dest, long destPos, int count) {
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41 int countStart = (destPos & 63) == 0 ? 0 : 64 - (int)(destPos & 63);
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42 if (countStart > count)
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43 countStart = count;
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44 for (int srcPosMax = srcPos + countStart; srcPos < srcPosMax; srcPos++, destPos++) {
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45 if (src[srcPos])
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46 dest.put((int)(destPos >>> 6), dest.get((int)(destPos >>> 6)) | 1L << (destPos & 63));
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47 else
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48 dest.put((int)(destPos >>> 6), dest.get((int)(destPos >>> 6)) & ~(1L << (destPos & 63)));
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49 }
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50 count -= countStart;
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51 int cnt = count >>> 6;
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52 for (int k = (int)(destPos >>> 6), kMax = k + cnt; k < kMax; k++) {
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53 int low = (src[srcPos] ? 1 : 0)
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54 | (src[srcPos + 1] ? 1 << 1 : 0)
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55 | (src[srcPos + 2] ? 1 << 2 : 0)
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56 | (src[srcPos + 3] ? 1 << 3 : 0)
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57 | (src[srcPos + 4] ? 1 << 4 : 0)
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58 | (src[srcPos + 5] ? 1 << 5 : 0)
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59 | (src[srcPos + 6] ? 1 << 6 : 0)
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60 | (src[srcPos + 7] ? 1 << 7 : 0)
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61 | (src[srcPos + 8] ? 1 << 8 : 0)
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62 | (src[srcPos + 9] ? 1 << 9 : 0)
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63 | (src[srcPos + 10] ? 1 << 10 : 0)
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64 | (src[srcPos + 11] ? 1 << 11 : 0)
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65 | (src[srcPos + 12] ? 1 << 12 : 0)
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66 | (src[srcPos + 13] ? 1 << 13 : 0)
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67 | (src[srcPos + 14] ? 1 << 14 : 0)
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68 | (src[srcPos + 15] ? 1 << 15 : 0)
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69 | (src[srcPos + 16] ? 1 << 16 : 0)
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70 | (src[srcPos + 17] ? 1 << 17 : 0)
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71 | (src[srcPos + 18] ? 1 << 18 : 0)
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72 | (src[srcPos + 19] ? 1 << 19 : 0)
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73 | (src[srcPos + 20] ? 1 << 20 : 0)
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74 | (src[srcPos + 21] ? 1 << 21 : 0)
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75 | (src[srcPos + 22] ? 1 << 22 : 0)
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76 | (src[srcPos + 23] ? 1 << 23 : 0)
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77 | (src[srcPos + 24] ? 1 << 24 : 0)
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78 | (src[srcPos + 25] ? 1 << 25 : 0)
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79 | (src[srcPos + 26] ? 1 << 26 : 0)
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80 | (src[srcPos + 27] ? 1 << 27 : 0)
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81 | (src[srcPos + 28] ? 1 << 28 : 0)
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82 | (src[srcPos + 29] ? 1 << 29 : 0)
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83 | (src[srcPos + 30] ? 1 << 30 : 0)
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84 | (src[srcPos + 31] ? 1 << 31 : 0)
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85 ;
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86 srcPos += 32;
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87 int high = (src[srcPos] ? 1 : 0) // PROBLEM!
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88 | (src[srcPos + 1] ? 1 << 1 : 0)
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89 | (src[srcPos + 2] ? 1 << 2 : 0)
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90 | (src[srcPos + 3] ? 1 << 3 : 0)
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91 | (src[srcPos + 4] ? 1 << 4 : 0)
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92 | (src[srcPos + 5] ? 1 << 5 : 0)
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93 | (src[srcPos + 6] ? 1 << 6 : 0)
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94 | (src[srcPos + 7] ? 1 << 7 : 0)
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95 | (src[srcPos + 8] ? 1 << 8 : 0)
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96 | (src[srcPos + 9] ? 1 << 9 : 0)
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97 | (src[srcPos + 10] ? 1 << 10 : 0)
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98 | (src[srcPos + 11] ? 1 << 11 : 0)
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99 | (src[srcPos + 12] ? 1 << 12 : 0)
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100 | (src[srcPos + 13] ? 1 << 13 : 0)
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101 | (src[srcPos + 14] ? 1 << 14 : 0)
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102 | (src[srcPos + 15] ? 1 << 15 : 0)
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103 | (src[srcPos + 16] ? 1 << 16 : 0)
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104 | (src[srcPos + 17] ? 1 << 17 : 0)
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105 | (src[srcPos + 18] ? 1 << 18 : 0)
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106 | (src[srcPos + 19] ? 1 << 19 : 0)
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107 | (src[srcPos + 20] ? 1 << 20 : 0)
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108 | (src[srcPos + 21] ? 1 << 21 : 0)
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109 | (src[srcPos + 22] ? 1 << 22 : 0)
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110 | (src[srcPos + 23] ? 1 << 23 : 0)
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111 | (src[srcPos + 24] ? 1 << 24 : 0)
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112 | (src[srcPos + 25] ? 1 << 25 : 0)
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113 | (src[srcPos + 26] ? 1 << 26 : 0)
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114 | (src[srcPos + 27] ? 1 << 27 : 0)
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115 | (src[srcPos + 28] ? 1 << 28 : 0)
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116 | (src[srcPos + 29] ? 1 << 29 : 0)
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117 | (src[srcPos + 30] ? 1 << 30 : 0)
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118 | (src[srcPos + 31] ? 1 << 31 : 0)
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119 ;
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120 srcPos += 32;
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121 dest.put(k, ((long)low & 0xFFFFFFFFL) | (((long)high) << 32));
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122 destPos += 64;
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123 }
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124 int countFinish = count & 63;
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125 for (int srcPosMax = srcPos + countFinish; srcPos < srcPosMax; srcPos++, destPos++) {
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126 if (src[srcPos])
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127 dest.put((int)(destPos >>> 6), dest.get((int)(destPos >>> 6)) | 1L << (destPos & 63));
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128 else
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129 dest.put((int)(destPos >>> 6), dest.get((int)(destPos >>> 6)) & ~(1L << (destPos & 63)));
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130 }
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131 }
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132 public static void main(String[] args) {
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133 Random r = new Random();
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134 int entries = 1000;
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135 boolean[] src = new boolean[entries * 64];
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136 long[] dest = new long[entries];
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137 long[] result = new long[entries];
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138
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139 for (int c = 0; c < 2000; c++) {
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140 for (int i = 0; i < entries; i++) {
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141 long l = r.nextLong();
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142 for (int bit = 0; bit < 64; bit++) {
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143 src[i * 64 + bit] = (l & (1L << bit)) != 0;
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144 }
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145 dest[i] = 0;
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146 result[i] = l;
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147 }
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148 test(src, 0, LongBuffer.wrap(dest, 0, dest.length), 0, src.length);
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149 for (int i = 0; i < entries; i++) {
b683f557224b 6661247: Internal bug in 32-bit HotSpot optimizer while bit manipulations
never
parents:
diff changeset
150 if (dest[i] != result[i]) {
b683f557224b 6661247: Internal bug in 32-bit HotSpot optimizer while bit manipulations
never
parents:
diff changeset
151 throw new InternalError(i + ": " + Long.toHexString(dest[i]) + " != " + Long.toHexString(result[i]));
b683f557224b 6661247: Internal bug in 32-bit HotSpot optimizer while bit manipulations
never
parents:
diff changeset
152 }
b683f557224b 6661247: Internal bug in 32-bit HotSpot optimizer while bit manipulations
never
parents:
diff changeset
153 }
b683f557224b 6661247: Internal bug in 32-bit HotSpot optimizer while bit manipulations
never
parents:
diff changeset
154 }
b683f557224b 6661247: Internal bug in 32-bit HotSpot optimizer while bit manipulations
never
parents:
diff changeset
155 }
b683f557224b 6661247: Internal bug in 32-bit HotSpot optimizer while bit manipulations
never
parents:
diff changeset
156 }