1  /* { dg-options "-O0" } */
       2  /* { dg-do compile } */
       3  
       4  extern unsigned foo (void);
       5  extern void bar (void);
       6  
       7  __attribute__ ((optimize ("O2")))
       8  void bak ()
       9  {
      10    unsigned a;
      11    while (1)
      12      {
      13        a = foo ();
      14        while (a)
      15  	{
      16  	  a &= 1;
      17  	  bar ();
      18  	}
      19      }
      20  }