1 /*
2  * Copyright (c) 2009, 2013, 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
30  *      -XX:CompileCommand=compileonly,compiler.c2.Test6636138_1::init
31  *      compiler.c2.Test6636138_1
32  */
33 
34 package compiler.c2;
35 
36 public class Test6636138_1 {
37 
init(int src[], int [] dst, int[] ref)38     public static void init(int src[], int [] dst, int[] ref) {
39         // initialize the arrays
40         for (int i =0; i<src.length; i++) {
41             src[i] =  i;
42             dst[i] = 2;      // yes, dst[i] needed(otherwise src[i] will be replaced with i)
43             ref[i] = src[i]; // src[i] depends on the store src[i]
44         }
45     }
46 
verify(int src[], int[] ref)47     public static void verify(int src[], int[] ref) {
48         // check whether src and ref are equal
49         for (int i = 0; i < src.length; i++) {
50             if (src[i] != ref[i]) {
51                 System.out.println("Error: src and ref don't match at " + i);
52                 System.exit(97);
53             }
54         }
55     }
56 
test()57     public static void test() {
58         int[] src = new int[34];
59         int[] dst = new int[34];
60         int[] ref = new int[34];
61 
62         init(src, dst, ref);
63         verify(src, ref);
64     }
65 
main(String[] args)66     public static void main(String[] args) {
67         for (int i=0; i< 2000; i++) {
68             test();
69         }
70     }
71 }
72