1 /*

     2  * Copyright (c) 2015, 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 8134321

    27  * @summary Code that capture field values of eliminated allocation at a safepoint when there's an arraycopy behind a Phi is broken

    28  * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement TestEliminatedArrayCopyPhi

    29  *

    30  */

    31 

    32 public class TestEliminatedArrayCopyPhi {

    33 

    34     static int[] escaped;

    35 

    36     static void test(int[] src, boolean flag1, boolean flag2) {

    37         int[] array = new int[10];

    38         if (flag1) {

    39             System.arraycopy(src, 0, array, 0, src.length);

    40         } else {

    41         }

    42 

    43         if (flag2) {

    44             // never taken

    45             escaped = array;

    46         }

    47     }

    48 

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

    50         int[] src = new int[10];

    51         for (int i = 0; i < 20000; i++) {

    52             test(src, (i % 2) == 0, false);

    53         }

    54     }

    55 }