author | bharadwaj |
Tue, 05 Apr 2016 20:32:54 +0000 | |
changeset 37295 | e00dfcc21fa1 |
parent 30300 | 4b12a5b40064 |
child 40059 | c2304140ed64 |
permissions | -rw-r--r-- |
30300
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
1 |
/* |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
2 |
* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
4 |
* |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
5 |
* This code is free software; you can redistribute it and/or modify it |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
6 |
* under the terms of the GNU General Public License version 2 only, as |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
7 |
* published by the Free Software Foundation. |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
8 |
* |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
9 |
* This code is distributed in the hope that it will be useful, but WITHOUT |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
10 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
11 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
12 |
* version 2 for more details (a copy is included in the LICENSE file that |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
13 |
* accompanied this code). |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
14 |
* |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
15 |
* You should have received a copy of the GNU General Public License version |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
16 |
* 2 along with this work; if not, write to the Free Software Foundation, |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
17 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
18 |
* |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
19 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
20 |
* or visit www.oracle.com if you need additional information or have any |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
21 |
* questions. |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
22 |
* |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
23 |
*/ |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
24 |
|
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
25 |
/** |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
26 |
* @test |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
27 |
* @bug 8069191 |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
28 |
* @summary predicate moved out of loops and CastPP removal causes dependency to be lost |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
29 |
* @run main/othervm -Xcomp -XX:CompileOnly=TestPredicateLostDependency.m1 -XX:+IgnoreUnrecognizedVMOptions -XX:+StressGCM TestPredicateLostDependency |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
30 |
* |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
31 |
*/ |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
32 |
|
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
33 |
public class TestPredicateLostDependency { |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
34 |
static class A { |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
35 |
int i; |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
36 |
} |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
37 |
|
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
38 |
static class B extends A { |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
39 |
} |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
40 |
|
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
41 |
static boolean crash = false; |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
42 |
|
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
43 |
static boolean m2() { |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
44 |
return crash; |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
45 |
} |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
46 |
|
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
47 |
static int m3(float[] arr) { |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
48 |
return 0; |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
49 |
} |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
50 |
|
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
51 |
static float m1(A aa) { |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
52 |
float res = 0; |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
53 |
float[] arr = new float[10]; |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
54 |
for (int i = 0; i < 10; i++) { |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
55 |
if (m2()) { |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
56 |
arr = null; |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
57 |
} |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
58 |
m3(arr); |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
59 |
int j = arr.length; |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
60 |
int k = 0; |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
61 |
for (k = 9; k < j; k++) { |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
62 |
} |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
63 |
if (k == 10) { |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
64 |
if (aa instanceof B) { |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
65 |
} |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
66 |
} |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
67 |
res += arr[0]; |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
68 |
res += arr[1]; |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
69 |
} |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
70 |
return res; |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
71 |
} |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
72 |
|
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
73 |
static public void main(String args[]) { |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
74 |
A a = new A(); |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
75 |
B b = new B(); |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
76 |
for (int i = 0; i < 20000; i++) { |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
77 |
m1(a); |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
78 |
} |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
79 |
crash = true; |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
80 |
try { |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
81 |
m1(a); |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
82 |
} catch (NullPointerException npe) {} |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
83 |
} |
4b12a5b40064
8069191: moving predicate out of loops may cause array accesses to bypass null check
roland
parents:
diff
changeset
|
84 |
} |