1/*
2 * Copyright (c) 2014, 2016, 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26/*
27 * @test
28 * @modules java.base/jdk.internal.misc
29 * @library /test/lib
30 *
31 * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:+EliminateAutoBox
32 *                   -XX:CompileOnly=::valueOf,::byteValue,::shortValue,::testUnsignedByte,::testUnsignedShort
33 *                   compiler.eliminateAutobox.UnsignedLoads
34 */
35
36package compiler.eliminateAutobox;
37
38import static jdk.test.lib.Asserts.assertEQ;
39
40public class UnsignedLoads {
41    public static int testUnsignedByte() {
42        byte[] bytes = new byte[] {-1};
43        int res = 0;
44        for (int i = 0; i < 100000; i++) {
45            for (Byte b : bytes) {
46                res = b & 0xff;
47            }
48        }
49        return res;
50    }
51
52    public static int testUnsignedShort() {
53        int res = 0;
54        short[] shorts = new short[] {-1};
55        for (int i = 0; i < 100000; i++) {
56            for (Short s : shorts) {
57                res = s & 0xffff;
58            }
59        }
60        return res;
61    }
62
63    public static void main(String[] args) {
64        assertEQ(testUnsignedByte(),    255);
65        assertEQ(testUnsignedShort(), 65535);
66        System.out.println("TEST PASSED");
67    }
68}
69