[Bug tree-optimization/77536] Vectorizer not maintaining relationship of relative block frequencies in absence of real profile data
amker at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Thu Feb 16 11:14:00 GMT 2017
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77536
amker at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amker at gcc dot gnu.org
--- Comment #4 from amker at gcc dot gnu.org ---
Looks like generic loop unrolling code used by predcom spends quite a lot
maintaining profiling counter, I will check if that's correct and we shall do
the same in vectorizer. At least simply scaling down vect_loop is wrong.
Thanks.
More information about the Gcc-bugs
mailing list