Mercurial > hg > jdk9-shenandoah > langtools
view test/tools/javac/lambda/speculative/T8055984.java @ 3031:286fc9270404
8078093: Severe compiler performance regression Java 7 to 8 for nested method invocations
Summary: Add infrastructure to avoid combinatorial explosion of method argument attributions
Reviewed-by: jlahoda, vromero, dlsmith
author | mcimadamore |
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date | Tue, 15 Sep 2015 13:43:44 +0100 |
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/* * Copyright (c) 2015, 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. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * 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. */ /* * @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<>()))))))))))))))))))); } }