1 /*

     2  * Copyright (c) 2011, 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 6796786

    27  * @summary invalid FP identity transform - (a - b) -> b - a

    28  *

    29  * @run main/othervm -Xbatch compiler.c2.Test6796786

    30  */

    31 

    32 package compiler.c2;

    33 

    34 public class Test6796786 {

    35     static volatile float d1;

    36     static volatile float d2;

    37 

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

    39         int total = 0;

    40         for (int i = 0; i < 100000; i++) {

    41             if (Float.floatToRawIntBits(- (d1 - d2)) == Float.floatToRawIntBits(-0.0f)) {

    42                 total++;

    43             }

    44         }

    45         if (total != 100000) {

    46             throw new InternalError();

    47         }

    48     }

    49 }