TestRegisterRestoring.java revision 12158:0fe2815ffa74 
1/*
2 * Copyright (c) 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.
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 8148490
27 * @summary Test correct saving and restoring of vector registers at safepoints.
28 *
29 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -Xbatch -XX:-TieredCompilation
30 *                   -XX:+SafepointALot
31 *                   -XX:CompileCommand=exclude,compiler.runtime.safepoints.TestRegisterRestoring::main
32 *                   compiler.runtime.safepoints.TestRegisterRestoring
33 */
34
35package compiler.runtime.safepoints;
36
37public class TestRegisterRestoring {
38    public static void main(String args[]) throws Exception {
39        // Initialize
40        float[] array = new float[100];
41        for (int i = 0; i < array.length; ++i) {
42            array[i] = 0;
43        }
44        // Test
45        for (int j = 0; j < 20_000; ++j) {
46            increment(array);
47            // Check result
48            for (int i = 0; i < array.length; i++) {
49                if (array[i] != 10_000) {
50                    throw new RuntimeException("Test failed: array[" + i + "] = " + array[i] + " but should be 10.000");
51                }
52                array[i] = 0;
53            }
54        }
55    }
56
57    static void increment(float[] array) {
58        // Loop with safepoint
59        for (long l = 0; l < 10_000; l++) {
60            // Vectorized loop
61            for (int i = 0; i < array.length; ++i) {
62                array[i] += 1;
63            }
64        }
65    }
66}
67
68