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comparison test/compiler/types/TestMeetTopArrayExactConstantArray.java @ 17619:5231c2210388

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8027571: fatal error: meet not symmetric Summary: meet of one constant array and one exact array not symmetric. Reviewed-by: kvn
author roland
date Tue, 07 Jan 2014 16:02:10 +0100
parents
children 45b0159f30f2
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17618:f834ae379225 17619:5231c2210388
1 /*
2 * Copyright (c) 2013, Oracle and/or its affiliates. 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 * @test
26 * @bug 8027571
27 * @summary meet of TopPTR exact array with constant array is not symmetric
28 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseOnStackReplacement -XX:TypeProfileLevel=222 -XX:+UnlockExperimentalVMOptions -XX:+UseTypeSpeculation -XX:-BackgroundCompilation TestMeetTopArrayExactConstantArray
29 *
30 */
31
32 public class TestMeetTopArrayExactConstantArray {
33
34 static class A {
35 }
36
37 static class B {
38 }
39
40 static class C extends A {
41 }
42
43 static class D extends C {
44 }
45
46 final static B[] b = new B[10];
47
48 static void m0(Object[] o) {
49 if (o.getClass() == Object[].class) {
50 }
51 }
52
53 static void m1(Object[] o, boolean cond) {
54 if (cond) {
55 o = b;
56 }
57 m0(o);
58 }
59
60 static void m2(Object[] o, boolean cond1, boolean cond2) {
61 if (cond1) {
62 m1(o, cond2);
63 }
64 }
65
66 static void m3(C[] o, boolean cond1, boolean cond2, boolean cond3) {
67 if (cond1) {
68 m2(o, cond2, cond3);
69 }
70 }
71
72 static public void main(String[] args) {
73 A[] a = new A[10];
74 D[] d = new D[10];
75 Object[] o = new Object[10];
76 for (int i = 0; i < 5000; i++) {
77 // record in profiling that the if in m0 succeeds
78 m0(o);
79 // record some profiling for m2 and m1
80 m2(a, true, (i%2) == 0);
81 // record some profiling for m3 and conflicting profile for m2
82 m3(d, true, false, (i%2) == 0);
83 }
84
85 // get m3 compiled. The if in m0 will be optimized because of argument profiling in m3
86 C[] c = new C[10];
87 for (int i = 0; i < 20000; i++) {
88 m3(c, true, false, (i%2) == 0);
89 }
90 // make m3 not entrant and the if in m0 fail
91 m3(c, true, true, false);
92 m3(c, true, true, false);
93 m3(c, true, true, false);
94 m3(c, true, true, false);
95
96 // make m3 recompile, this time with if the not optimized
97 // on entry to m3, argument o is of type C[], profiled C[]
98 // on entry to m1, argument o is of type C[], speculative C[] exact, profiled A[]. Speculative becomes AnyNull
99 // after the if in m1, speculative type of o becomes constant from final field b
100 // the true if branch in m0 does a join between the type of o of speculative type constant from final field b and exact klass Object[]
101 for (int i = 0; i < 20000; i++) {
102 m3(c, true, false, (i%2) == 0);
103 }
104
105 System.out.println("TEST PASSED");
106 }
107 }