1  /* { dg-do run } */
       2  /* { dg-require-alias "" } */
       3  
       4  extern void abort (void);
       5  
       6  int a = 1, c = 1;
       7  extern int b __attribute__((alias("a")));
       8  extern int d __attribute__((alias("c")));
       9  int main(int argc)
      10  {
      11    int *p, *q;
      12    if (argc >= 0)
      13      p = &c, q = &d;
      14    else
      15      p = &b, q = &d;
      16    *p = 1;
      17    *q = 2;
      18    if (*p == 1)
      19      abort();
      20    return 0;
      21  }