1 /*
2  * Copyright (c) 2016, 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 8161147
27  * @requires vm.flavor == "server" & !vm.emulatedClient
28  * @summary Safepoint on backedge breaks UseCountedLoopSafepoints
29  * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:+UseCountedLoopSafepoints TestCountedLoopSafepointBackedge
30  *
31  */
32 
33 public class TestCountedLoopSafepointBackedge {
test(int[] arr, int inc)34     static void test(int[] arr, int inc) {
35         int i = 0;
36         for (;;) {
37             for (int j = 0; j < 10; j++);
38             arr[i] = i;
39             i++;
40             if (i >= 100) {
41                 break;
42             }
43             for (int j = 0; j < 10; j++);
44         }
45     }
46 
main(String[] args)47     static public void main(String[] args) {
48         int[] arr = new int[100];
49         for (int i = 0; i < 20000; i++) {
50              test(arr, 1);
51         }
52     }
53 }
54