1/*
2 * Copyright 2009 Google Inc.  All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25/**
26 * @test
27 * @bug 6837094
28 * @summary False positive for "meet not symmetric" failure
29 *
30 * @run main/othervm -Xbatch
31 *    -XX:CompileCommand=compileonly,compiler.c2.Test6837094::collectIs
32 *    -XX:CompileCommand=compileonly,compiler.c2.Test6837094$Factory$1::getArray
33 *    -XX:CompileCommand=compileonly,compiler.c2.Test6837094$Factory$2::getArray
34 *    compiler.c2.Test6837094
35 */
36
37package compiler.c2;
38
39import java.util.HashSet;
40import java.util.Set;
41
42public class Test6837094 {
43
44  private interface Factory<M extends Interface> {
45    Factory<Child0> Zero = new Factory<Child0>() {
46      public Child0[] getArray() { return new Child0[1]; }
47    };
48
49    Factory<Child1> One = new Factory<Child1>() {
50      public Child1[] getArray() { return new Child1[1]; }
51    };
52
53    M[] getArray();
54  }
55
56  /**
57   * C2 asserts when compiling this method. Bimorphic inlining happens at
58   * getArray call site. A Phi in the catch block tries to join the meet type
59   * from he inline site (Parent[]) with the type expected by CI (Interface[]).
60   *
61   * C2 throws an assert when it doesn't need to.
62   */
63  private static <I extends Interface> void collectIs(
64      Factory<I> factory, Set<Interface> s) {
65    for (I i : factory.getArray()) {
66      try {
67        s.add(i);
68      } catch (Exception e) {
69      }
70    }
71  }
72
73  static public void main(String argv[]) {
74    Set<Interface> s = new HashSet();
75
76    for (int i = 0; i < 25000; i++) {
77      collectIs(Factory.Zero, s);
78      collectIs(Factory.One, s);
79    }
80  }
81
82  /**
83   * Establish necessary class hierarchy
84   */
85
86  static interface Interface {
87  }
88
89  static class Parent {
90  }
91
92  static class Child0 extends Parent implements Interface {
93  }
94
95  static class Child1 extends Parent implements Interface {
96  }
97
98  static class Child2 extends Parent implements Interface {
99  }
100
101}
102
103