[libcxx-commits] [libcxx] [libc++] Use builtin for `std::is_sufficiently_aligned` (PR #173582)

[A. Jiang via libcxx-commits]

frederick-vs-ja wrote:

I think we can even drop the `reinterpret_cast` strategy because both Clang and GCC have been supporting `__builtin_is_aligned` for a long while. But I'm not sure whether this is desired.

https://github.com/llvm/llvm-project/pull/173582