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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/101995] [9/10/11/12 Regression] regression
 built-in memset missed-optimization arm -Os
Date: Sat, 21 Aug 2021 02:53:36 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101995

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-08-21
             Target|arm                         |arm, aarch64
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
On x86_64 for some reason it works in GCC 9+; tested with " -Os
-mstringop-strategy=3Dlibcall" and adding noinline to doStuff just to force=
 to
make sure it does not inline.

Anyways confirmed, worked in GCC 8.2.0 for both aarch64 and arm but does not
work in GCC 9.=