1 /*
2  * Copyright (c) 2018, Red Hat, 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  * @test
26  * @bug 8201368
27  * @summary IfNode::fold_compares() may lead to incorrect execution
28  *
29  * @run main/othervm -XX:-TieredCompilation -XX:-UseOnStackReplacement -XX:-BackgroundCompilation FoldedIfNonDomMidIf
30  *
31  */
32 
33 public class FoldedIfNonDomMidIf {
main(String[] args)34     public static void main(String[] args) {
35         for (int i = 0; i < 20_000; i++) {
36             test_helper(0, 0);
37             test_helper(20, 0);
38             test(12);
39         }
40         if (test(14) != null) {
41             throw new RuntimeException("Incorrect code execution");
42         }
43     }
44 
test(int i)45     private static Object test(int i) {
46         return test_helper(i, 0x42);
47     }
48 
49     static class A {
50 
51     }
52 
53     static final MyException myex = new MyException();
54 
test_helper(int i, int j)55     private static Object test_helper(int i, int j) {
56         Object res = null;
57         try {
58             if (i < 10) {
59                 throw myex;
60             }
61 
62             if (i == 14) {
63 
64             }
65 
66             if (i > 15) {
67                 throw myex;
68             }
69         } catch (MyException e) {
70             if (j == 0x42) {
71                 res = new A();
72             }
73         }
74         return res;
75     }
76 
77     private static class MyException extends Exception {
78     }
79 }
80