/* * Copyright (c) 2025, 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 8342692 * @summary C2: long counted loop/long range checks: don't create loop-nest for short running loops * @run main/othervm -XX:-TieredCompilation -XX:-UseOnStackReplacement -XX:-BackgroundCompilation TestShortLoopLostLimit * @run main/othervm TestShortLoopLostLimit */ public class TestShortLoopLostLimit { private static volatile int volatileField; public static void main(String[] args) { for (int i = 0; i < 20_000; i++) { test1(0, 100); test2(0, 100); } } private static void test1(int a, long b) { for (long i = 0; i < a + b; i += 2) { volatileField = 42; } } private static void test2(int a, long b) { for (long i = a + b; i > 0; i -= 2) { volatileField = 42; } } }