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[Bug tree-optimization/77536] Vectorizer not maintaining relationship of relative block frequencies in absence of real profile data
- From: "amker at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 16 Feb 2017 11:13:57 +0000
- Subject: [Bug tree-optimization/77536] Vectorizer not maintaining relationship of relative block frequencies in absence of real profile data
- Auto-submitted: auto-generated
- References: <bug-77536-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77536
amker at gcc dot gnu.org changed:
What |Removed |Added
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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.