gcc/testsuite/gcc.c-torture/execute/960909-1.c

   1 int
   2 ffs (x)
   3      int x;
   4 {
   5   int bit, mask;
   6
   7   if (x == 0)
   8     return 0;
   9
  10   for (bit = 1, mask = 1; !(x & mask); bit++, mask <<= 1)
  11     ;
  12
  13   return bit;
  14 }
  15
  16 f (x)
  17      int x;
  18 {
  19   int y;
  20   y = ffs (x) - 1;
  21   if (y < 0)
  22     abort ();
  23 }
  24
  25 main ()
  26 {
  27   f (1);
  28   exit (0);
  29 }