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1 /* |
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2 * Copyright (c) 2002, 2018, 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 * |
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27 * @summary converted from VM Testbase runtime/jbe/dead/dead12. |
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28 * VM Testbase keywords: [quick, runtime] |
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29 * |
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30 * @library /vmTestbase |
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31 * /test/lib |
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32 * @run driver jdk.test.lib.FileInstaller . . |
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33 * @run main/othervm vm.compiler.jbe.dead.dead12.dead12 |
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34 */ |
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35 |
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36 package vm.compiler.jbe.dead.dead12; |
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37 |
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38 // dead12.java |
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39 |
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40 /* -- Test the elimination of dead assignments to a local array within IF statement |
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41 Example: |
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42 |
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43 boolean bol = true; |
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44 void foo() |
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45 { |
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46 int arr[] = new int[SIZE]; |
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47 if (bol) arr[1] = 3; |
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48 } |
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49 |
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50 In the example below, most of the assignments to the local array a[] are dead and can be eliminated. |
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51 */ |
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52 |
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53 public class dead12 { |
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54 int SIZE = 30; |
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55 boolean bol = true; |
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56 |
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57 public static void main(String args[]) { |
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58 dead12 dce = new dead12(); |
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59 |
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60 System.out.println("f()="+dce.f()+"; fopt()="+dce.fopt()); |
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61 if (dce.f() == dce.fopt()) { |
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62 System.out.println("Test dead12 Passed."); |
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63 } else { |
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64 throw new Error("Test dead12 Failed: f()=" + dce.f() + " != fopt()=" + dce.fopt()); |
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65 } |
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66 } |
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67 |
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68 int f() { |
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69 |
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70 int a[] = new int[SIZE]; |
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71 |
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72 if (bol) |
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73 a[0] = 0; |
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74 if (bol) |
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75 a[1] = 1; |
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76 if (bol) |
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77 a[2] = 2; |
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78 if (bol) |
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79 a[3] = 3; |
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80 if (bol) |
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81 a[4] = 4; |
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82 if (bol) |
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83 a[5] = 5; |
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84 if (bol) |
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85 a[6] = 6; |
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86 if (bol) |
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87 a[7] = 7; |
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88 if (bol) |
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89 a[8] = 8; |
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90 if (bol) |
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91 a[9] = 9; |
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92 if (bol) |
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93 a[10] = 10; |
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94 if (bol) |
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95 a[11] = 11; |
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96 if (bol) |
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97 a[12] = 12; |
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98 if (bol) |
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99 a[13] = 13; |
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100 if (bol) |
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101 a[14] = 14; |
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102 if (bol) |
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103 a[15] = 15; |
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104 if (bol) |
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105 a[16] = 16; |
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106 if (bol) |
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107 a[17] = 17; |
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108 if (bol) |
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109 a[18] = 18; |
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110 if (bol) |
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111 a[19] = 19; |
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112 if (bol) |
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113 a[20] = 20; |
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114 if (bol) |
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115 a[21] = 21; |
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116 if (bol) |
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117 a[22] = 22; |
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118 if (bol) |
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119 a[23] = 23; |
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120 if (bol) |
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121 a[24] = 24; |
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122 if (bol) |
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123 a[25] = 25; |
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124 if (bol) |
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125 a[26] = 26; |
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126 if (bol) |
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127 a[27] = 27; |
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128 if (bol) |
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129 a[28] = 28; |
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130 if (bol) |
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131 a[29] = 29; |
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132 |
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133 return a[12]; |
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134 } |
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135 |
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136 // Code fragment after dead code elimination |
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137 int fopt() { |
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138 int a[] = new int[SIZE]; |
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139 |
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140 a[12] = 12; |
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141 return a[12] = 12; |
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142 } |
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143 } |