test/compiler/7199742/Test7199742.java

/*
 * Copyright (c) 2012, Oracle and/or its affiliates. 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.
 *
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/**
 * @test
 * @bug 7199742
 * @summary A lot of C2 OSR compilations of the same method's bci
 *
 * @run main/othervm -Xmx32m -Xbatch Test7199742
 */

public class Test7199742 {
  private static final int ITERS  = 10000000;
  public static void main(String args[]) {
    Test7199742 t = new Test7199742();
    for (int i=0; i<10; i++) {
      test(t, 7);
    }
  }
  static Test7199742 test(Test7199742 t, int m) {
    int i = -(ITERS/2);
    if (i == 0) return null;
    Test7199742 v = null;
    while(i < ITERS) {
      if ((i&m) == 0) {
        v = t;
      }
      i++;
    }
    return v;
  }
}