1  /* { dg-do compile } */
       2  /* { dg-options "-O3" } */
       3  
       4  int a[512];
       5  int b;
       6  void d()
       7  {
       8    unsigned char c;
       9    for (; b; b++) {
      10        c = 1;
      11        for (; c; c <<= 1) {
      12  	  a[b] <<= 8;
      13  	  if (b & c)
      14  	    a[b] = 1;
      15        }
      16    }
      17  }