[Bug middle-end/86471] GCC/libstdc++ outputs inferior code for std::fill and std::fill_n vs std::memset on c-style arrays

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86471

--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Also you're doing a reinterpret_cast from an arbitrary iterator type, which is
not necessarily a pointer, or even a random access iterator.

Since you don't have a copyright assignment in place please leave the patch to
us, this is less than helpful :-)