1 /*
   2  * Copyright (c) 2020, 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 8247824
  27  * @summary CTW: C2 (Shenandoah) compilation fails with SEGV in SBC2Support::pin_and_expand
  28  * @requires vm.flavor == "server"
  29  * @requires vm.gc.Shenandoah
  30  *
  31  * @run main/othervm -XX:-BackgroundCompilation -XX:+UseShenandoahGC -XX:LoopMaxUnroll=0 TestShenandoahLRBInOuterStripMinedLoop
  32  *
  33  */
  34 
  35 import java.util.Arrays;
  36 
  37 public class TestShenandoahLRBInOuterStripMinedLoop {
  38     public static void main(String[] args) {
  39         A[] array = new A[4000];
  40         Arrays.fill(array, new A());
  41         for (int i = 0; i < 20_0000; i++) {
  42             test(array);
  43         }
  44     }
  45 
  46     private static int test(A[] array) {
  47         A a = null;
  48         int v = 1;
  49         A b = null;
  50         for (int i = 0; i < 2000; i++) {
  51             a = array[i];
  52             b = array[2*i];
  53             v *= 2;
  54         }
  55         return a.f + b.f + v;
  56     }
  57 
  58     private static class A {
  59         public int f;
  60     }
  61 }