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From: "acoplan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/113618] [14 Regression] AArch64: memmove idiom
 regression
Date: Fri, 26 Jan 2024 15:05:13 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113618

Alex Coplan <acoplan at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2024-01-26
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
                 CC|                            |acoplan at gcc dot gnu.org

--- Comment #1 from Alex Coplan <acoplan at gcc dot gnu.org> ---
Confirmed.

(In reply to Wilco from comment #0)
> A possible fix would be to avoid emitting LDP/STP in memcpy/memmove/memset
> expansions.

Yeah, so I had posted
https://gcc.gnu.org/pipermail/gcc-patches/2023-November/636855.html for that
but held off from committing it at the time as IMO there wasn't enough evid=
ence
to show that this helps in general (and the pass could in theory miss
opportunities which would lead to regressions).=20

But perhaps this is a good argument for going ahead with that change (of co=
urse
it will need rebasing).=