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[Bug tree-optimization/81673] Harmful SLP vectorization
- From: "jamborm at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 18 Aug 2017 15:56:25 +0000
- Subject: [Bug tree-optimization/81673] Harmful SLP vectorization
- Auto-submitted: auto-generated
- References: <bug-81673-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81673
Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Depends on| |80689
--- Comment #5 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Benchmarking the patch revealed that without addressing PR 80689
first, it severely harms -Ofast performance of 538.imagick_r. With PR
80689 addressed, it helps as intended.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80689
[Bug 80689] 128 bit loads generated for structure copying with gcc 7.1.0 and
leads to STLF stalls in avx2 targets.