1 /*

     2  * Copyright 2009 Sun Microsystems, 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    24 

    25 /**

    26  * @test

    27  * @bug 6769124

    28  * @summary int value might not be correctly decoded on deopt with c1 on 64 bit

    29  *

    30  * @run main/othervm -Xcomp -XX:CompileOnly=TestDeoptInt6769124.m TestDeoptInt6769124

    31  */

    32 

    33 public class TestDeoptInt6769124 {

    34 

    35     static class A {

    36         volatile int vl;

    37         A(int v) {

    38             vl = v;

    39         }

    40     }

    41 

    42     static void m(int b) {

    43         A a = new A(10);

    44         int c;

    45         c = b + a.vl; //accessing volatile field of class not loaded at compile time forces a deopt

    46         if(c != 20) {

    47             System.out.println("a (= " + a.vl + ") + b (= " + b + ") = c (= " + c + ") != 20");

    48             throw new InternalError();

    49         }

    50     }

    51 

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

    53         m(10);

    54     }

    55 

    56 }