Test7199742.java revision 11707:ad7af1afda7a 
1/*
2 * Copyright (c) 2012, 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/**
26 * @test
27 * @bug 7199742
28 * @summary A lot of C2 OSR compilations of the same method's bci
29 *
30 * @run main/othervm -Xmx32m -Xbatch compiler.c2.Test7199742
31 */
32
33package compiler.c2;
34
35public class Test7199742 {
36    private static final int ITERS = 10000000;
37
38    public static void main(String args[]) {
39        Test7199742 t = new Test7199742();
40        for (int i = 0; i < 10; i++) {
41            test(t, 7);
42        }
43    }
44
45    static Test7199742 test(Test7199742 t, int m) {
46        int i = -(ITERS / 2);
47        if (i == 0) return null;
48        Test7199742 v = null;
49        while (i < ITERS) {
50            if ((i & m) == 0) {
51                v = t;
52            }
53            i++;
54        }
55        return v;
56    }
57}
58
59