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From: "lists at coryfields dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/54412] minimal 32-byte stack alignment with -mavx on
 64-bit Windows
Date: Fri, 01 Apr 2022 15:01:31 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D54412

Cory Fields <lists at coryfields dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |lists at coryfields dot com

--- Comment #33 from Cory Fields <lists at coryfields dot com> ---
Adding another +1. Still present in 10.3.0.

Bitcoin Core's sha2 code uses avx2 when possible. We ran into this bug when
bumping our toolchain:
https://github.com/bitcoin/bitcoin/pull/24736

and opted to take Debian's patch:
https://salsa.debian.org/mingw-w64-team/gcc-mingw-w64/-/blob/master/debian/=
patches/vmov-alignment.patch

It's unfortunate that the best and most common advice for using avx2 with
gcc/mingw is to use a patched compiler. Might it be possible to accept Debi=
an's
patch upstream?=