1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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  *
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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22  */
23 
24 /*
25  * @test
26  * @bug 8027422
27  * @summary type methods shouldn't always operate on speculative part
28  *
29  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:TypeProfileLevel=222
30  *                   -XX:+UseTypeSpeculation -XX:-BackgroundCompilation
31  *                   compiler.types.TestSpeculationFailedHigherEqual
32  */
33 
34 package compiler.types;
35 
36 public class TestSpeculationFailedHigherEqual {
37 
38     static class A {
m()39         void m() {}
40         int i;
41     }
42 
43     static class C extends A {
44     }
45 
46     static C c;
47 
m1(A a, boolean cond)48     static A m1(A a, boolean cond) {
49         // speculative type for a is C not null
50         if (cond ) {
51             a = c;
52         }
53         // speculative type for a is C (may be null)
54         int i = a.i;
55         return a;
56     }
57 
main(String[] args)58     static public void main(String[] args) {
59         C c = new C();
60         TestSpeculationFailedHigherEqual.c = c;
61         for (int i = 0; i < 20000; i++) {
62             m1(c, i%2 == 0);
63         }
64 
65         System.out.println("TEST PASSED");
66     }
67 }
68