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
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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  *
29  * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement
30  *                   compiler.arraycopy.TestEliminatedArrayCopyPhi
31  */
32 
33 package compiler.arraycopy;
34 
35 public class TestEliminatedArrayCopyPhi {
36 
37     static int[] escaped;
38 
test(int[] src, boolean flag1, boolean flag2)39     static void test(int[] src, boolean flag1, boolean flag2) {
40         int[] array = new int[10];
41         if (flag1) {
42             System.arraycopy(src, 0, array, 0, src.length);
43         } else {
44         }
45 
46         if (flag2) {
47             // never taken
48             escaped = array;
49         }
50     }
51 
main(String[] args)52     public static void main(String[] args) {
53         int[] src = new int[10];
54         for (int i = 0; i < 20000; i++) {
55             test(src, (i % 2) == 0, false);
56         }
57     }
58 }
59