jdk8-mips64-public/hotspot: test/compiler/loopopts/TestBeautifyLoops.java@4373df7c4a92

8240576: JVM crashes after transformation in C2 IdealLoopTree::merge_many_backedges
Reviewed-by: kvn
Contributed-by: hedongbo@huawei.com

     1 /*

     2  * Copyright (c) 2020, Huawei Technologies Co. Ltd. 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  */

    24 /**

    25  * @test

    26  * @bug 8240576

    27  * @summary JVM crashes after transformation in C2 IdealLoopTree::merge_many_backedges

    28  *

    29  * @run main/othervm -XX:-TieredCompilation -XX:-BackgroundCompilation

    30  *      compiler.loopopts.TestBeautifyLoops

    31  */

    33 package compiler.loopopts;

    35 public class TestBeautifyLoops {

    36     private int mI = 0;

    37     private long mJ = 0;

    38     private float mF = 0f;

    40     public void testMethod() {

    41         for (int i0 = 0; i0 < 100; i0++) {

    42             if (mF != 0) {

    43                 // do nothing

    44             } else {

    45                 try {

    46                     mJ = Long.MAX_VALUE;

    47                     for (int i1 = 0; i1 < 101; i1++) {

    48                         for (int i2 = 0; i2 < 102; i2++) {

    49                             mI = new Integer(0x1234);

    50                         }

    51                     }

    52                 } catch (Exception ignored) {}

    53             }

    54         }

    55     }

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

    58         TestBeautifyLoops obj = new TestBeautifyLoops();

    59         obj.testMethod();

    60     }

    61 }

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