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[Bug tree-optimization/84037] [8 Regression] Speed regression of polyhedron benchmark since r256643
- From: "hubicka at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 25 Jan 2018 14:44:56 +0000
- Subject: [Bug tree-optimization/84037] [8 Regression] Speed regression of polyhedron benchmark since r256643
- Auto-submitted: auto-generated
- References: <bug-84037-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84037
--- Comment #5 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I have added cost model for gather/scatter. Perhaps it only needs to be tuned
to be more expensive.
avx512 is not needed for gather, it is supported by haswell (avx2).