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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22  */
23 
24 /*
25  * @test
26  * @bug 8078093 8055894
27  * @summary Exponential performance regression Java 8 compiler compared to Java 7 compiler
28  * @compile T8055984.java
29  */
30 
31 class T8055984 {
32     static class C<U> {
33         U fu;
34 
C()35         C() { }
36 
C(C<U> other)37         C(C<U> other) {
38             this.fu = other.fu;
39         }
40 
C(U fu)41         C(U fu) {
42             this.fu = fu;
43         }
44     }
45 
m(C<U> src)46     static <U> C<U> m(C<U> src) { return new C<U>(src); }
47 
test()48     static void test() {
49         C<String> c2 = m(new C<>(m(new C<>() )) );
50         C<String> c3 = m(new C<>(m(new C<>(m(new C<>() )) )) );
51         C<String> c4 = m(new C<>(m(new C<>(m(new C<>(m(new C<>() )) )) )) );
52         C<String> c5 = m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>() )) )) )) )) );
53         C<String> c6 = m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>() )) )) )) )) )) );
54         C<String> c7 = m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>() )) )) )) )) )) )) );
55         C<String> c8 = m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>() )) )) )) )) )) )) )) );
56         C<String> c9 = m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>() )) )) )) )) )) )) )) )) );
57         C<String> c10 = m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>())))))))))))))))))));
58     }
59 }
60 
61