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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/105651] [12/13 Regression] bogus "may
 overlap" memcpy warning with std::string and operator+ at -O3
Date: Tue, 26 Jul 2022 10:46:22 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105651

--- Comment #14 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 26 Jul 2022, jakub at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105651
>=20
> --- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> My preference would be still to make the overlap case out-of-line as ment=
ioned
> in PR105329, but I don't have statistics on whether the overlap case is r=
eally
> cold in real-world.  If yes, it would make non-overlap case smaller and t=
he
> overlap case tiny bit slower.

I would say so.  It's of course still beneficial to optimize the
overlap test if possible.  I'm now testing a series of changes required.=