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1 /* |
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2 * Copyright (c) 2019, 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 * @test |
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26 * @bug 8223502 |
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27 * @summary Node estimate for loop unswitching is not correct: |
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28 * assert(delta <= 2 * required) failed: Bad node estimate |
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29 * |
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30 * @requires !vm.graal.enabled |
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31 * |
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32 * @run main/othervm -XX:-TieredCompilation -XX:-BackgroundCompilation |
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33 * -XX:-UseOnStackReplacement -XX:CompileOnly=LoopUnswitchingBadNodeBudget::test |
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34 * -XX:CompileCommand=dontinline,LoopUnswitchingBadNodeBudget::helper |
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35 * -XX:+UnlockExperimentalVMOptions -XX:-UseSwitchProfiling LoopUnswitchingBadNodeBudget |
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36 * |
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37 */ |
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38 |
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39 public class LoopUnswitchingBadNodeBudget { |
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40 |
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41 public static void main(String[] args) { |
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42 for (int i = 0; i < 20_000; i++) { |
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43 for (int j = 0; j < 100; j++) { |
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44 test(j, true, 0, 0, 0); |
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45 test(j, false, 0, 0, 0); |
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46 } |
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47 } |
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48 } |
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49 |
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50 private static int test(int j, boolean flag, int k, int l, int m) { |
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51 int res = 0; |
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52 for (int i = 0; i < 24; i++) { |
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53 if (flag) { |
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54 k = k / 2; |
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55 l = l * 2; |
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56 m = m + 2; |
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57 } |
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58 switch (j) { |
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59 case 0: break; |
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60 case 1: return helper(j, k, l, m); |
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61 case 2: return helper(j, k, l, m); |
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62 case 3: return helper(j, k, l, m); |
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63 case 4: return helper(j, k, l, m); |
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64 case 5: return helper(j, k, l, m); |
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65 case 6: return helper(j, k, l, m); |
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66 case 7: return helper(j, k, l, m); |
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67 case 8: return helper(j, k, l, m); |
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68 case 9: return helper(j, k, l, m); |
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69 case 10: return helper(j, k, l, m); |
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70 case 11: return helper(j, k, l, m); |
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71 case 12: return helper(j, k, l, m); |
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72 case 13: return helper(j, k, l, m); |
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73 case 14: return helper(j, k, l, m); |
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74 case 15: return helper(j, k, l, m); |
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75 case 16: return helper(j, k, l, m); |
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76 case 17: return helper(j, k, l, m); |
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77 case 18: return helper(j, k, l, m); |
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78 case 19: return helper(j, k, l, m); |
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79 case 20: return helper(j, k, l, m); |
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80 case 21: return helper(j, k, l, m); |
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81 case 22: return helper(j, k, l, m); |
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82 case 23: return helper(j, k, l, m); |
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83 case 24: return helper(j, k, l, m); |
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84 case 25: return helper(j, k, l, m); |
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85 case 26: return helper(j, k, l, m); |
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86 case 27: return helper(j, k, l, m); |
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87 case 28: return helper(j, k, l, m); |
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88 case 29: return helper(j, k, l, m); |
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89 case 30: return helper(j, k, l, m); |
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90 case 31: return helper(j, k, l, m); |
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91 case 32: return helper(j, k, l, m); |
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92 case 33: return helper(j, k, l, m); |
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93 case 34: return helper(j, k, l, m); |
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94 case 35: return helper(j, k, l, m); |
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95 case 36: return helper(j, k, l, m); |
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96 case 37: return helper(j, k, l, m); |
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97 case 38: return helper(j, k, l, m); |
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98 case 39: return helper(j, k, l, m); |
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99 case 40: return helper(j, k, l, m); |
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100 case 41: return helper(j, k, l, m); |
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101 case 42: return helper(j, k, l, m); |
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102 case 43: return helper(j, k, l, m); |
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103 case 44: return helper(j, k, l, m); |
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104 case 45: return helper(j, k, l, m); |
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105 case 46: return helper(j, k, l, m); |
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106 case 47: return helper(j, k, l, m); |
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107 case 48: return helper(j, k, l, m); |
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108 case 49: return helper(j, k, l, m); |
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109 case 50: return helper(j, k, l, m); |
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110 case 51: return helper(j, k, l, m); |
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111 case 52: return helper(j, k, l, m); |
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112 case 53: return helper(j, k, l, m); |
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113 case 54: return helper(j, k, l, m); |
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114 case 55: return helper(j, k, l, m); |
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115 case 56: return helper(j, k, l, m); |
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116 case 57: return helper(j, k, l, m); |
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117 case 58: return helper(j, k, l, m); |
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118 case 59: return helper(j, k, l, m); |
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119 case 60: return helper(j, k, l, m); |
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120 case 61: return helper(j, k, l, m); |
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121 case 62: return helper(j, k, l, m); |
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122 case 63: return helper(j, k, l, m); |
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123 case 64: return helper(j, k, l, m); |
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124 case 65: return helper(j, k, l, m); |
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125 case 66: return helper(j, k, l, m); |
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126 case 67: return helper(j, k, l, m); |
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127 case 68: return helper(j, k, l, m); |
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128 case 69: return helper(j, k, l, m); |
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129 case 70: return helper(j, k, l, m); |
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130 case 71: return helper(j, k, l, m); |
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131 case 72: return helper(j, k, l, m); |
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132 case 73: return helper(j, k, l, m); |
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133 case 74: return helper(j, k, l, m); |
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134 case 75: return helper(j, k, l, m); |
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135 case 76: return helper(j, k, l, m); |
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136 case 77: return helper(j, k, l, m); |
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137 case 78: return helper(j, k, l, m); |
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138 case 79: return helper(j, k, l, m); |
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139 case 80: return helper(j, k, l, m); |
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140 case 81: return helper(j, k, l, m); |
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141 case 82: return helper(j, k, l, m); |
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142 case 83: return helper(j, k, l, m); |
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143 case 84: return helper(j, k, l, m); |
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144 case 85: return helper(j, k, l, m); |
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145 case 86: return helper(j, k, l, m); |
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146 case 87: return helper(j, k, l, m); |
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147 case 88: return helper(j, k, l, m); |
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148 case 89: return helper(j, k, l, m); |
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149 case 90: return helper(j, k, l, m); |
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150 case 91: return helper(j, k, l, m); |
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151 case 92: return helper(j, k, l, m); |
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152 case 93: return helper(j, k, l, m); |
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153 case 94: return helper(j, k, l, m); |
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154 case 95: return helper(j, k, l, m); |
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155 case 96: return helper(j, k, l, m); |
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156 case 97: return helper(j, k, l, m); |
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157 case 98: return helper(j, k, l, m); |
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158 case 99: return helper(j, k, l, m); |
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159 } |
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160 res += helper(j, k, l, m); |
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161 } |
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162 return res; |
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163 } |
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164 |
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165 private static int helper(int j, int k, int l, int m) { |
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166 return j + k; |
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167 } |
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168 } |