TestVectorRegAlloc.java revision 11707:ad7af1afda7a 
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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23 */
24
25/**
26 * @test
27 * @bug 8131969
28 * @summary assert in register allocation code when vector Phi for a loop is
29 * processed because code assumes all inputs already processed
30 *
31 * @run main/othervm -Xbatch compiler.regalloc.TestVectorRegAlloc
32 */
33
34package compiler.regalloc;
35
36public class TestVectorRegAlloc {
37
38    static int test_helper_i;
39    static boolean test_helper() {
40        test_helper_i++;
41        return (test_helper_i & 7) != 0;
42    }
43
44    static void test(double[] src, double[] dst, boolean flag) {
45        double j = 0.0;
46        while(test_helper()) {
47            for (int i = 0; i < src.length; i++) {
48                dst[i] = src[i] + j;
49            }
50            // Loop will be unswitched and ReplicateD of zero will be
51            // split through the Phi of outer loop
52            for (int i = 0; i < src.length; i++) {
53                double k;
54                if (flag) {
55                    k = j;
56                } else {
57                    k = 0;
58                }
59                dst[i] = src[i] + k;
60            }
61            j++;
62        }
63    }
64
65    static public void main(String[] args) {
66        double[] src = new double[10];
67        double[] dst = new double[10];
68        for (int i = 0; i < 20000; i++) {
69            test(src, dst, (i % 2) == 0);
70        }
71    }
72}
73