test/hotspot/jtreg/compiler/loopopts/CountedLoopPeelingProfilePredicates.java
author jiangli
Fri, 02 Nov 2018 19:30:31 -0400
changeset 52397 1322829d1501
parent 50923 c98bf5aa35c5
permissions -rw-r--r--
8209564: runtime/appcds/CDSandJFR.java timeout on tier6 on sparc Summary: Set timeout 500 in CDSandJFR.java Reviewed-by: dcubed
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/*
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 * Copyright (c) 2018, Red Hat, Inc. 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.
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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 8205515
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 * @summary CountedLoopEndNode from peeled loop body is not candidate for profile loop predication
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 *
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 * @run main/othervm -XX:-TieredCompilation -XX:-BackgroundCompilation -XX:-UseOnStackReplacement CountedLoopPeelingProfilePredicates
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 *
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 */
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import java.util.Arrays;
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public class CountedLoopPeelingProfilePredicates {
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    public static void main(String[] args) {
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        int stop = 2;
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        boolean[] flags1 = new boolean[stop];
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        flags1[stop-1] = true;
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        boolean[] flags2 = new boolean[stop];
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        flags2[0] = true;
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        boolean[] flags3 = new boolean[100];
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        Arrays.fill(flags3, true);
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        flags3[0] = false;
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        for (int i = 0; i < 20_000; i++) {
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            test_helper(stop, flags1, false);
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            test_helper(stop, flags2, false);
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            test_helper(stop, flags2, false);
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        }
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        for (int i = 0; i < 20_000; i++) {
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            test(stop, flags1, false, flags3, 1);
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            test(stop, flags2, false, flags3, 1);
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            test(stop, flags2, false, flags3, 1);
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        }
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    }
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    private static void test(int stop, boolean[] flags1, boolean flag2, boolean[] flags3, int inc) {
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        for (int j = 0; j < 100; j+=inc) {
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            if (flags3[j]) {
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                test_helper(stop, flags1, flag2);
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            }
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        }
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    }
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    private static void test_helper(int stop, boolean[] flags1, boolean flag2) {
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        for (int i = 0; i < stop; i++) {
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            if (flags1[i]) {
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                return;
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            }
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            if (flag2) {
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            }
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        }
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    }
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}