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
34package compiler.c2;
35
36public class Test6636138_1 {
37
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
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
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
66    public static void main(String[] args) {
67        for (int i=0; i< 2000; i++) {
68            test();
69        }
70    }
71}
72