[Bug middle-end/36041] Speed up builtin_popcountll

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36041

--- Comment #13 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #12)
> Created attachment 30381 [details]
> IFUNC proof of concept patch

I think it is a bad idea to use ifunc for such a function as most of the time
it is link against statically in most cases.  Why can't you compile your code
with -march=native for the places where you know you are going to compile and
run directly on the same machine?