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[Bug tree-optimization/81303] [8 Regression] 410.bwaves regression caused by r249919
- 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: Wed, 16 Aug 2017 16:20:32 +0000
- Subject: [Bug tree-optimization/81303] [8 Regression] 410.bwaves regression caused by r249919
- Auto-submitted: auto-generated
- References: <bug-81303-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81303
amker at gcc dot gnu.org changed:
What |Removed |Added
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CC| |amker at gcc dot gnu.org
--- Comment #10 from amker at gcc dot gnu.org ---
(In reply to Wilco from comment #8)
> (In reply to Richard Biener from comment #7)
>
> Unfortunately these commits have had no effect on AArch64...
Because we (as well as powerpc?) don't peel for alignment now, thus the change
in peeling cost has no impact on AArch64. I still believe interchange (on the
basis of distribution) is the correct direction to fix this regression (and
bring further improvement). Of course, vectorization should be avoided even
after interchange on x86.