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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/102837] [12 regression] Many 32-bit gdc tests FAIL
Date: Mon, 25 Oct 2021 11:32:29 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102837

--- Comment #3 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot U=
ni-Bielefeld.DE> ---
> --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
> (In reply to Andrew Pinski from comment #1)
>> It is one of the following:
>> g:8088a33df5f62fd6416fb8cb158b791e639aa707
>
> Most likely this one.

Actually, it's

commit efa5449a094d3887e124d400ff0410af2c745b2d
Author: Iain Buclaw <ibuclaw@gdcproject.org>
Date:   Sat Sep 25 19:50:52 2021 +0200

    libphobos: Give _Unwind_Exception an alignment that best resembles
__attribute__((aligned))

in particular

+else version (X86)      private enum __aligned__ =3D 16;

I don't yet see where/how struct _Unwind_Execption is allocated to
guarantee that alignment.  Depending on the answer PR libstdc++/77691
(32-bit Solaris/x86 malloc only returns 8-byte aligned memory) or the
fact that the stack is only 4-byte aligned following the i386 psABI) may
be relevant.=