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