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comparison test/compiler/6837094/Test.java @ 820:915cc9c5ebc6

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6837094: False positive for "meet not symmetric" failure Summary: Have the meet not symmetric check recursively do the interface-vs-oop check on array subtypes. Reviewed-by: jrose Contributed-by: rasbold@google.com
author kvn
date Tue, 23 Jun 2009 17:52:29 -0700
parents
children 84770322b304
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819:c6386080541b 820:915cc9c5ebc6
1 /*
2 * Copyright 2009 Sun Microsystems, 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any 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 -XX:CompileOnly=Test.collectIs,Test$Factory$1.getArray,Test$Factory$2.getArray Test
31 */
32
33 import java.util.Set;
34 import java.util.HashSet;
35
36 public class Test {
37
38 private interface Factory<M extends Interface> {
39 Factory<Child0> Zero = new Factory<Child0>() {
40 public Child0[] getArray() { return new Child0[1]; }
41 };
42
43 Factory<Child1> One = new Factory<Child1>() {
44 public Child1[] getArray() { return new Child1[1]; }
45 };
46
47 M[] getArray();
48 }
49
50 /**
51 * C2 asserts when compiling this method. Bimorphic inlining happens at
52 * getArray call site. A Phi in the catch block tries to join the meet type
53 * from he inline site (Parent[]) with the type expected by CI (Interface[]).
54 *
55 * C2 throws an assert when it doesn't need to.
56 */
57 private static <I extends Interface> void collectIs(
58 Factory<I> factory, Set<Interface> s) {
59 for (I i : factory.getArray()) {
60 try {
61 s.add(i);
62 } catch (Exception e) {
63 }
64 }
65 }
66
67 static public void main(String argv[]) {
68 Set<Interface> s = new HashSet();
69
70 for (int i = 0; i < 25000; i++) {
71 collectIs(Factory.Zero, s);
72 collectIs(Factory.One, s);
73 }
74 }
75 }
76
77 /**
78 * Establish necessary class hierarchy
79 */
80
81 interface Interface {
82 }
83
84 class Parent {
85 }
86
87 class Child0 extends Parent implements Interface {
88 }
89
90 class Child1 extends Parent implements Interface {
91 }
92
93 class Child2 extends Parent implements Interface {
94 }