Count number of 0's from the most significant bit to the least stopping at the first 1.
Declared in <llvm/ADT/bit.h>
template<typename T>
[[nodiscard]]
constexpr
int
countl_zero_constexpr(T Val);A constexpr version of countl_zero.
Only unsigned integral types are allowed.
Returns std::numeric_limits<T>::digits on an input of 0.
Leading zero count, or std::numeric_limits<T>::digits if Val is 0.
The return value should not be discarded.
| Name | Description |
|---|---|
| Val | Unsigned value to scan from the most significant bit. |