--- /dev/null 2018-11-08 20:24:10.890027295 +0100 +++ new/test/hotspot/jtreg/compiler/integerArithmetic/MultiplyByIntegerMinHang.java 2018-11-14 15:00:25.410645732 +0100 @@ -0,0 +1,64 @@ +/* + * Copyright (c) 2018, 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 8213419 + * @summary C2 may hang in MulLNode::Ideal()/MulINode::Ideal() with gcc 8.2.1 + * + * @run main/othervm -XX:-TieredCompilation -XX:-BackgroundCompilation -XX:-UseOnStackReplacement MultiplyByIntegerMinHang + * + */ + +public class MultiplyByIntegerMinHang { + public static void main(String[] args) { + for (int i = 0; i < 20_000; i++) { + if (test1(0) != 0) { + throw new RuntimeException("incorrect result"); + } + if (test1(1) != Integer.MIN_VALUE) { + throw new RuntimeException("incorrect result"); + } + if (test1(2) != 0) { + throw new RuntimeException("incorrect result"); + } + if (test2(0) != 0) { + throw new RuntimeException("incorrect result"); + } + if (test2(1) != Long.MIN_VALUE) { + throw new RuntimeException("incorrect result"); + } + if (test2(2) != 0) { + throw new RuntimeException("incorrect result"); + } + } + } + + private static int test1(int v) { + return v * Integer.MIN_VALUE; + } + + private static long test2(long v) { + return v * Long.MIN_VALUE; + } +}