[Bug target/65782] Assembly failure (invalid register for .seh_savexmm) with -O3 -mavx512f on mingw-w64

[ktietz at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65782

Kai Tietz <ktietz at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-09-22
                 CC|                            |ktietz at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Kai Tietz <ktietz at gcc dot gnu.org> ---
This issue is related to output in gcc for SEH-prologue pseudos.  It tries to
output registers not being supported 8-byte SSE ones.

Generally, AVX512 can't be supported in an 32-byte aligned way on x64 target
anyway.