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
21  * questions.
22  */
23 
24 /**
25  * @test
26  * @bug 8131969
27  * @summary assert in register allocation code when vector Phi for a loop is
28  * processed because code assumes all inputs already processed
29  *
30  * @run main/othervm -Xbatch compiler.regalloc.TestVectorRegAlloc
31  */
32 
33 package compiler.regalloc;
34 
35 public class TestVectorRegAlloc {
36 
37     static int test_helper_i;
test_helper()38     static boolean test_helper() {
39         test_helper_i++;
40         return (test_helper_i & 7) != 0;
41     }
42 
test(double[] src, double[] dst, boolean flag)43     static void test(double[] src, double[] dst, boolean flag) {
44         double j = 0.0;
45         while(test_helper()) {
46             for (int i = 0; i < src.length; i++) {
47                 dst[i] = src[i] + j;
48             }
49             // Loop will be unswitched and ReplicateD of zero will be
50             // split through the Phi of outer loop
51             for (int i = 0; i < src.length; i++) {
52                 double k;
53                 if (flag) {
54                     k = j;
55                 } else {
56                     k = 0;
57                 }
58                 dst[i] = src[i] + k;
59             }
60             j++;
61         }
62     }
63 
main(String[] args)64     static public void main(String[] args) {
65         double[] src = new double[10];
66         double[] dst = new double[10];
67         for (int i = 0; i < 20000; i++) {
68             test(src, dst, (i % 2) == 0);
69         }
70     }
71 }
72