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[Bug ipa/63671] [5 Regression] 21% tramp3d-v4 performance hit due to -fdevirtualize
- From: "trippels at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 29 Oct 2014 10:24:05 +0000
- Subject: [Bug ipa/63671] [5 Regression] 21% tramp3d-v4 performance hit due to -fdevirtualize
- Auto-submitted: auto-generated
- References: <bug-63671-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63671
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> I suppose -flto is the same as -fwhole-program then?
Yes.
> Maybe too much speculative inlining happens?
Hopefully Honza finds time to tune inlining before release.
> Does using FDO mitigate the -fdevirtualize hit?
Yes.