60 lines
1.9 KiB
Java
60 lines
1.9 KiB
Java
/*
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* Copyright (c) 2020, 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 8253756
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* @summary dead outer strip mined not optimized out after expansion
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* @requires vm.compiler2.enabled
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*
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* @run main/othervm -XX:-BackgroundCompilation -XX:LoopMaxUnroll=2 TestOuterStripMinedDeadAfterExpansion
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*
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*/
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public class TestOuterStripMinedDeadAfterExpansion {
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private static int field;
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public static void main(String[] args) {
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int[] array = new int[100];
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for (int i = 0; i < 20_000; i++) {
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test(array, array, array.length);
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test_helper(array, 100);
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}
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}
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private static int test(int[] src, int[] dst, int length) {
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field = 4 << 17;
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System.arraycopy(src, 0, dst, 0, length);
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int stop = field >>> 17;
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return test_helper(dst, stop);
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}
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private static int test_helper(int[] dst, int stop) {
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int res = 0;
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for (int i = 0; i < stop; i++) {
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res += dst[i];
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}
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return res;
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}
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}
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