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  * @test

    26  * @bug 6636138

    27  * @summary SuperWord::co_locate_pack(Node_List* p) generates memory graph that leads to memory order violation.

    28  *

    29  * @run main/othervm -server -Xbatch -XX:CompileOnly=Test1.init -XX:+UseSuperword Test1

    30  */

    31 

    32 class Test1 {

    33 

    34     public static void init(int src[], int [] dst, int[] ref) {

    35         // initialize the arrays

    36         for (int i =0; i<src.length; i++) {

    37             src[i] =  i;

    38             dst[i] = 2;      // yes, dst[i] needed(otherwise src[i] will be replaced with i)

    39             ref[i] = src[i]; // src[i] depends on the store src[i]

    40         }

    41     }

    42 

    43     public static void verify(int src[], int[] ref) {

    44         // check whether src and ref are equal

    45         for (int i = 0; i < src.length; i++) {

    46             if (src[i] != ref[i]) {

    47                 System.out.println("Error: src and ref don't match at " + i);

    48                 System.exit(-1);

    49             }

    50         }

    51     }

    52 

    53     public static void test() {

    54         int[] src = new int[34];

    55         int[] dst = new int[34];

    56         int[] ref = new int[34];

    57 

    58         init(src, dst, ref);

    59         verify(src, ref);

    60     }

    61 

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

    63         for (int i=0; i< 2000; i++) {

    64             test();

    65         }

    66     }

    67 }