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 /**

    26  * @test

    27  * @bug 6992759

    28  * @summary Bad code generated for integer <= comparison, fails for Integer.MAX_VALUE

    29  *

    30  * @run main Test6992759

    31  */

    32 

    33 public class Test6992759 {

    34 

    35     static final int N_TESTS = 1000000000;

    36 

    37     public static void main(String[] args) throws Exception {

    38 

    39         /*

    40          * If MAX_VALUE is changed to MAX_VALUE - 1 below, the test passes

    41          * because (apparently) bad code is only generated when comparing

    42          * <= MAX_VALUE in the doTest method.

    43          */

    44         Test6992759 test = new Test6992759();

    45         for (int i = 0; i < N_TESTS; i += 1) {

    46             test.doTest(10, Integer.MAX_VALUE, i);

    47             //test.doTest(10, Integer.MAX_VALUE - 1, i);

    48         }

    49         System.out.println("No failure");

    50     }

    51 

    52     void doTest(int expected, int max, int i) {

    53         int counted;

    54         for (counted = 0;

    55              (counted <= max) && (counted < expected);

    56              counted += 1) {

    57         }

    58         if (counted != expected) {

    59             throw new RuntimeException("Failed test iteration=" + i +

    60                                        " max=" + max +

    61                                        " counted=" + counted +

    62                                        " expected=" + expected);

    63         }

    64     }

    65 }

    66