var Input uint64 = DeBruijn64

// Exported (global) variable to store function results
// during benchmarking to ensure side-effect free calls
// are not optimized away.
var Output int

func BenchmarkLeadingZeros(b *testing.B) {
	var s int
	for i := 0; i < b.N; i++ {
		s += LeadingZeros(uint(Input) >> (uint(i) % UintSize))
	}
	Output = s
}

func BenchmarkLeadingZeros8(b *testing.B) {
	var s int