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

["jamrial at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

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

            Bug ID: 65782
           Summary: Assembly failure (invalid register for .seh_savexmm)
                    with -O3 -mavx512f on mingw-w64
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jamrial at gmail dot com

Created attachment 35328
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35328&action=edit
Assembly output

https://raw.githubusercontent.com/foo86/dcadec/4dac90072f1a0ad368430dbbb568ac71def0241f/libdcadec/idct_float.c

GCC 5.1.0 RC and mingw-w64 v4.0.1, cross-compiler. Can also be reproduced with
GCC 4.9

[jamrial@archVM dcadec]$ x86_64-w64-mingw32-gcc -O3 -mavx512f -c -o
libdcadec/idct_float.o libdcadec/idct_float.c
/tmp/ccGUgVPR.s: Assembler messages:
/tmp/ccGUgVPR.s:557: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:559: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:561: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:563: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:565: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:567: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:569: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:571: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:573: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:575: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:577: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:579: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:581: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:583: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:585: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:587: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1482: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1484: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1486: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1488: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1490: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1492: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1494: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1496: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1498: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1500: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1502: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1504: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1506: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1508: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1510: Error: invalid register for .seh_savexmm
/tmp/ccGUgVPR.s:1512: Error: invalid register for .seh_savexmm

[jamrial@archVM dcadec]$ x86_64-w64-mingw32-gcc -v
Using built-in specs.
COLLECT_GCC=x86_64-w64-mingw32-gcc
COLLECT_LTO_WRAPPER=/opt/mingw64/lib/gcc/x86_64-w64-mingw32/5.0.1/lto-wrapper
Target: x86_64-w64-mingw32
Configured with: /home/jamrial/gcc-5.1.0-RC-20150412/configure
--host=x86_64-unknown-linux-gnu --build=x86_64-unknown-linux-gnu
--target=x86_64-w64-mingw32 --disable-multilib --enable-static --disable-shared
--enable-64bit --prefix=/opt/mingw64 --with-sysroot=/opt/mingw64
--enable-version-specific-runtime-libs --with-dwarf
--enable-fully-dynamic-string --enable-languages=c,c++ --enable-libssp
--with-host-libstdcxx='-lstdc++ -lsupc++' --enable-lto --disable-win32-registry
--libexecdir=/opt/mingw64/lib --disable-nls
Thread model: win32
gcc version 5.0.1 20150412 (prerelease) (GCC)

Attached is the resulting assembly file.