Test8007722.java revision 11707:ad7af1afda7a 
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 8007722
27 * @summary GetAndSetP's MachNode should capture bottom type
28 *
29 * @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation
30 *      compiler.c2.Test8007722
31 */
32
33package compiler.c2;
34
35import java.util.concurrent.atomic.AtomicReference;
36
37public class Test8007722 {
38
39    int i;
40    static AtomicReference<Test8007722> ref;
41
42    static int test(Test8007722 new_obj) {
43        Test8007722 o = ref.getAndSet(new_obj);
44        int ret = o.i;
45        o.i = 5;
46        return ret;
47    }
48
49    static public void main(String[] args) {
50        Test8007722 obj = new Test8007722();
51        ref = new AtomicReference<Test8007722>(obj);
52
53        for (int i = 0; i < 20000; i++) {
54            test(obj);
55        }
56
57        System.out.println("PASSED");
58    }
59}
60