File: 960909-1.c

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gcc-arm-none-eabi 15%3A12.2.rel1-1
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int
ffs (x)
     int x;
{
  int bit, mask;

  if (x == 0)
    return 0;

  for (bit = 1, mask = 1; !(x & mask); bit++, mask <<= 1)
    ;

  return bit;
}

f (x)
     int x;
{
  int y;
  y = ffs (x) - 1;
  if (y < 0) 
    abort ();
}

main ()
{
  f (1);
  exit (0);
}