1 /*

     2  * Copyright (c) 2010, 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 6973329

    27  * @summary C2 with Zero based COOP produces code with broken anti-dependency on x86

    28  *

    29  * @run main/othervm -Xbatch -Xcomp

    30  *    -XX:CompileCommand=compileonly,compiler.c2.Test6973329::*

    31  *    compiler.c2.Test6973329

    32  */

    33 

    34 package compiler.c2;

    35 

    36 public class Test6973329 {

    37     static class A {

    38         A next;

    39         int n;

    40 

    41         public int get_n() {

    42             return n + 1;

    43         }

    44     }

    45 

    46     A a;

    47 

    48     void test(A new_next) {

    49         A prev_next = a.next;

    50         a.next = new_next;

    51         if (prev_next == null) {

    52             a.n = a.get_n();

    53         }

    54     }

    55 

    56     public static void main(String args[]) {

    57         Test6973329 t = new Test6973329();

    58         t.a = new A();

    59         t.a.n = 1;

    60         t.test(new A());

    61         if (t.a.n != 2) {

    62             System.out.println("Wrong value: " + t.a.n + " expected: 2");

    63             System.exit(97);

    64         }

    65     }

    66 }

    67