1  /* PR tree-optimization/57322 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-w -O1" } */
       4  int a;
       5  
       6  void f (void)
       7  {
       8    char b;
       9  
      10    for (;; a++)
      11      {
      12        char *p = &b, *q;
      13        *q = b < 0 & !!*p;
      14      }
      15  }