[Bug c++/80265] __builtin_{memcmp,memchr,strlen} are not usable in constexpr functions

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80265

--- Comment #25 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #24)
> Also, the more work that the algorithm does, the more concerned I'd be that
> although the inputs are constant (and so we use the naive for-loop) the
> actual work done in the loop might be too much to inline, so we make a

That should have read "might be too much to inline and/or unroll at
compile-time".

> run-time call to the slow version when we could use memcmp.