langtools/test/tools/javac/lambda/speculative/T8078093.java
author mcimadamore
Tue, 15 Sep 2015 13:43:44 +0100
changeset 32709 55d136799f79
permissions -rw-r--r--
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
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/*
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 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 * @test
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 * @bug 8078093
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 * @summary Exponential performance regression Java 8 compiler compared to Java 7 compiler
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 * @compile T8078093.java
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 */
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import java.util.LinkedHashMap;
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import java.util.Map;
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class T8078093 {
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    public static void test() {
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        Map<Integer, String> a = x(x(x(x(x(x(x(x(x(x(x(x(
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                                    new LinkedHashMap<Integer, String>(),
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                                    1, "a"), 2, "b"), 3, "c"), 4, "d"),
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                                    5, "e"), 6, "f"), 7, "g"), 8, "h"),
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                                    9, "i"), 10, "j"), 11, "k"), 12, "l");
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    }
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    @SuppressWarnings("unused")
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    public static <K, V> Map<K, V> x(Map<K, V> m, K k, V v) {
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        // Replaced actual code by dummy implementation.
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        return null;
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    }
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}