--- /dev/null 2016-06-30 12:00:49.707487412 +0200 +++ new/test/compiler/loopopts/TestCountedLoopSafepointBackedge.java 2016-07-22 17:27:10.887674256 +0200 @@ -0,0 +1,52 @@ +/* + * Copyright (c) 2016, 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 8161147 + * @summary Safepoint on backedge breaks UseCountedLoopSafepoints + * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:+UseCountedLoopSafepoints TestCountedLoopSafepointBackedge + * + */ + +public class TestCountedLoopSafepointBackedge { + static void test(int[] arr, int inc) { + int i = 0; + for (;;) { + for (int j = 0; j < 10; j++); + arr[i] = i; + i++; + if (i >= 100) { + break; + } + for (int j = 0; j < 10; j++); + } + } + + static public void main(String[] args) { + int[] arr = new int[100]; + for (int i = 0; i < 20000; i++) { + test(arr, 1); + } + } +}