1 /*
   2  * Copyright (c) 2009, 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 6636138
  27  * @summary SuperWord::co_locate_pack(Node_List* p) generates memory graph that leads to memory order violation.
  28  *
  29  * @run main/othervm -Xbatch -XX:CompileOnly=Test1.init Test1
  30  */
  31 
  32 public 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(97);
  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 }