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 8213419
  27  * @summary C2 may hang in MulLNode::Ideal()/MulINode::Ideal() with gcc 8.2.1
  28  *
  29  * @run main/othervm -XX:-TieredCompilation -XX:-BackgroundCompilation -XX:-UseOnStackReplacement MultiplyByIntegerMinHang
  30  *
  31  */
  32 
  33 public class MultiplyByIntegerMinHang {
  34     public static void main(String[] args) {
  35         for (int i = 0; i < 20_000; i++) {
  36             if (test1(0) != 0) {
  37                 throw new RuntimeException("incorrect result");
  38             }
  39             if (test1(1) != Integer.MIN_VALUE) {
  40                 throw new RuntimeException("incorrect result");
  41             }
  42             if (test1(2) != 0) {
  43                 throw new RuntimeException("incorrect result");
  44             }
  45             if (test2(0) != 0) {
  46                 throw new RuntimeException("incorrect result");
  47             }
  48             if (test2(1) != Long.MIN_VALUE) {
  49                 throw new RuntimeException("incorrect result");
  50             }
  51             if (test2(2) != 0) {
  52                 throw new RuntimeException("incorrect result");
  53             }
  54         }
  55     }
  56 
  57     private static int test1(int v) {
  58         return v * Integer.MIN_VALUE;
  59     }
  60 
  61     private static long test2(long v) {
  62         return v * Long.MIN_VALUE;
  63     }
  64 }