1 /*
2  * Copyright (c) 2019, 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 /*
26  * @test
27  * @bug 8231223
28  * @summary Test conditional move optimization encountering an Opaque4Node.
29  * @run main/othervm -Xbatch -XX:-TieredCompilation
30  *                   -XX:CompileCommand=inline,compiler.loopopts.TestCMovWithOpaque::test
31  *                   compiler.loopopts.TestCMovWithOpaque
32  */
33 
34 package compiler.loopopts;
35 
36 public class TestCMovWithOpaque {
37 
test(int array[])38     public static void test(int array[]) {
39         for (int i = 1; i < 8; i += 3) {
40             for (int j = 0; j < 4; ++j) {
41                 switch (i % 4) {
42                 case 0:
43                     break;
44                 case 1:
45                     break;
46                 case 2:
47                     break;
48                 case 3:
49                     array[j] += 42;
50                     break;
51                 }
52             }
53         }
54     }
55 
main(String[] args)56     public static void main(String[] args) {
57         int[] array = new int[4];
58         for (int i = 0; i < 20_000; ++i) {
59             test(array);
60         }
61     }
62 }
63