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[Bug middle-end/36041] Speed up builtin_popcountll
- From: "pinskia at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 26 Jun 2013 23:31:51 +0000
- Subject: [Bug middle-end/36041] Speed up builtin_popcountll
- Auto-submitted: auto-generated
- References: <bug-36041-4 at http dot gcc dot gnu dot org/bugzilla/>
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?