1 /* 2 * Copyright (c) 2018, 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 8196296 27 * @summary Bad graph when unrolled loop bounds conflicts with range checks 28 * 29 * @run main/othervm -XX:-BackgroundCompilation -XX:+IgnoreUnrecognizedVMOptions -XX:LoopUnrollLimit=0 TestStripMinedBackToBackIfs 30 * 31 */ 32 33 34 public class TestStripMinedBackToBackIfs { 35 public static void main(String[] args) { 36 for (int i = 0; i < 20_000; i++) { 37 test(100); 38 } 39 } 40 41 private static double test(int limit) { 42 double v = 1; 43 for (int i = 0; i < limit; i++) { 44 v = v * 4; 45 // We don't want this test to be merged with identical 46 // loop end test 47 if (i+1 < limit) { 48 v = v * 2; 49 } 50 } 51 return v; 52 } 53 }