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1 /* |
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2 * Copyright 2009 Google Inc. 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 6837094 |
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28 * @summary False positive for "meet not symmetric" failure |
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29 * |
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30 * @run main/othervm -Xbatch -XX:CompileOnly=Test.collectIs,Test$Factory$1.getArray,Test$Factory$2.getArray Test |
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31 */ |
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32 |
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33 import java.util.Set; |
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34 import java.util.HashSet; |
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35 |
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36 public class Test { |
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37 |
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38 private interface Factory<M extends Interface> { |
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39 Factory<Child0> Zero = new Factory<Child0>() { |
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40 public Child0[] getArray() { return new Child0[1]; } |
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41 }; |
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42 |
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43 Factory<Child1> One = new Factory<Child1>() { |
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44 public Child1[] getArray() { return new Child1[1]; } |
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45 }; |
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46 |
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47 M[] getArray(); |
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48 } |
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49 |
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50 /** |
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51 * C2 asserts when compiling this method. Bimorphic inlining happens at |
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52 * getArray call site. A Phi in the catch block tries to join the meet type |
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53 * from he inline site (Parent[]) with the type expected by CI (Interface[]). |
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54 * |
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55 * C2 throws an assert when it doesn't need to. |
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56 */ |
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57 private static <I extends Interface> void collectIs( |
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58 Factory<I> factory, Set<Interface> s) { |
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59 for (I i : factory.getArray()) { |
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60 try { |
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61 s.add(i); |
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62 } catch (Exception e) { |
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63 } |
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64 } |
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65 } |
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66 |
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67 static public void main(String argv[]) { |
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68 Set<Interface> s = new HashSet(); |
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69 |
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70 for (int i = 0; i < 25000; i++) { |
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71 collectIs(Factory.Zero, s); |
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72 collectIs(Factory.One, s); |
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73 } |
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74 } |
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75 } |
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76 |
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77 /** |
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78 * Establish necessary class hierarchy |
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79 */ |
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80 |
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81 interface Interface { |
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82 } |
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83 |
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84 class Parent { |
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85 } |
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86 |
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87 class Child0 extends Parent implements Interface { |
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88 } |
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89 |
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90 class Child1 extends Parent implements Interface { |
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91 } |
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92 |
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93 class Child2 extends Parent implements Interface { |
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94 } |