test/langtools/tools/javac/lambda/speculative/T8055984.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @bug 8078093 8055894
 * @summary Exponential performance regression Java 8 compiler compared to Java 7 compiler
 * @compile T8055984.java
 */

class T8055984 {
    static class C<U> {
        U fu;

        C() { }

        C(C<U> other) {
            this.fu = other.fu;
        }

        C(U fu) {
            this.fu = fu;
        }
    }

    static <U> C<U> m(C<U> src) { return new C<U>(src); }

    static void test() {
        C<String> c2 = m(new C<>(m(new C<>() )) );
        C<String> c3 = m(new C<>(m(new C<>(m(new C<>() )) )) );
        C<String> c4 = m(new C<>(m(new C<>(m(new C<>(m(new C<>() )) )) )) );
        C<String> c5 = m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>() )) )) )) )) );
        C<String> c6 = m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>() )) )) )) )) )) );
        C<String> c7 = m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>(m(new C<>() )) )) )) )) )) )) );
        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<>() )) )) )) )) )) )) )) );
        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<>() )) )) )) )) )) )) )) )) );
        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<>())))))))))))))))))));
    }
}