1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/*
* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package compiler.c2;
/**
* @test
* @bug 8266480
* @summary Check correct re-wiring of control edge when hoisting a memory
* operation for an implicit null check.
* @run main/othervm -Xbatch
* compiler.c2.TestImplicitNullCheckDominance
*/
public class TestImplicitNullCheckDominance {
double dFld;
int iFld;
static void test1(TestImplicitNullCheckDominance t, double d) {
for (int i = 0; i < 100; i++) {
t.dFld = d % 42;
t.iFld = 43;
}
}
static void test2(TestImplicitNullCheckDominance t) {
for (int i = 0; i < 10; i++) {
for (int j = 0; j < 100; j++) {
t.dFld %= 42;
t.iFld = 43;
}
}
}
public static void main(String[] args) {
TestImplicitNullCheckDominance t = new TestImplicitNullCheckDominance();
for (int i = 0; i < 50_000; ++i) {
test1(t, i);
test2(t);
}
}
}
|
