1 /* 2 * Copyright (c) 2020, Red Hat, Inc. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /** 25 * @test 26 * @bug 8247824 27 * @summary CTW: C2 (Shenandoah) compilation fails with SEGV in SBC2Support::pin_and_expand 28 * @requires vm.flavor == "server" 29 * @requires vm.gc.Shenandoah 30 * 31 * @run main/othervm -XX:-BackgroundCompilation -XX:+UseShenandoahGC -XX:LoopMaxUnroll=0 TestShenandoahLRBInOuterStripMinedLoop 32 * 33 */ 34 35 import java.util.Arrays; 36 37 public class TestShenandoahLRBInOuterStripMinedLoop { 38 public static void main(String[] args) { 39 A[] array = new A[4000]; 40 Arrays.fill(array, new A()); 41 for (int i = 0; i < 20_0000; i++) { 42 test(array); 43 } 44 } 45 46 private static int test(A[] array) { 47 A a = null; 48 int v = 1; 49 A b = null; 50 for (int i = 0; i < 2000; i++) { 51 a = array[i]; 52 b = array[2*i]; 53 v *= 2; 54 } 55 return a.f + b.f + v; 56 } 57 58 private static class A { 59 public int f; 60 } 61 }