source: trunk/openjdk/hotspot/test/compiler/6973329/Test.java

/*
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 * 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.
 *
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 */

/**
 * @test
 * @bug 6973329
 * @summary C2 with Zero based COOP produces code with broken anti-dependency on x86
 *
 * @run main/othervm -Xbatch -Xcomp -XX:CompileOnly=Test Test
 */

class A {
  A next;
  int n;

  public int get_n() {
    return n+1;
  }
}
public class Test {

  A a;

  void test (A new_next) {
    A prev_next = a.next;
    a.next = new_next;
    if (prev_next == null) {
      a.n = a.get_n();
    }
  }

  public static void main(String args[]) {
    Test t = new Test();
    t.a = new A();
    t.a.n = 1;
    t.test(new A());
    if (t.a.n != 2) {
      System.out.println("Wrong value: " + t.a.n + " expected: 2");
      System.exit(97);
    }
  }
}