[Bug target/81763] Issues with BMI on 32bit x86 apps on GCC 7.1+

["mike at fireburn dot co.uk" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763

--- Comment #11 from Mike Lothian <mike at fireburn dot co.uk> ---
So a lot of the segfaults I see are in si_shader so I thought I'd compile Mesa
with and without BMI and compare the onjdumps of the two .o files

CFLAGS="-O2 -march=native -pipe -mno-bmi -m32" CXXFLAGS="-O2 -march=native
-pipe -mno-bmi -m32" LDFLAGS="-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed
-fuse-ld=bfd -m32" ./autogen.sh --prefix=/usr --build=i686-pc-linux-gnu
--host=i686-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info
--datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib
--disable-dependency-tracking --disable-silent-rules
--docdir=/usr/share/doc/mesa-9999 --htmldir=/usr/share/doc/mesa-9999/html
--libdir=/usr/lib32 --enable-dri --enable-glx --enable-shared-glapi
--enable-texture-float --enable-nine --disable-debug --enable-dri3 --enable-egl
--enable-gbm --enable-gles1 --enable-gles2 --enable-glx-tls --disable-libunwind
--enable-valgrind=no --enable-llvm-shared-libs --with-dri-drivers=,swrast,i965
--with-gallium-drivers=,swrast,radeonsi --with-vulkan-drivers=,intel,radeon
PYTHON2=/usr/bin/python2.7 --with-platforms=x11,surfaceless,wayland,drm
--enable-nine --enable-llvm --enable-omx --enable-va --enable-vdpau
--disable-xa --disable-xvmc --with-va-libdir=/usr/lib32/va/drivers
--disable-glx-read-only-text --disable-gallium-osmesa


CFLAGS="-O2 -march=native -pipe -m32" CXXFLAGS="-O2 -march=native -pipe -m32"
LDFLAGS="-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -fuse-ld=bfd -m32"
./autogen.sh --prefix=/usr --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu
--mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share
--sysconfdir=/etc --localstatedir=/var/lib --disable-dependency-tracking
--disable-silent-rules --docdir=/usr/share/doc/mesa-9999
--htmldir=/usr/share/doc/mesa-9999/html --libdir=/usr/lib32 --enable-dri
--enable-glx --enable-shared-glapi --enable-texture-float --enable-nine
--disable-debug --enable-dri3 --enable-egl --enable-gbm --enable-gles1
--enable-gles2 --enable-glx-tls --disable-libunwind --enable-valgrind=no
--enable-llvm-shared-libs --with-dri-drivers=,swrast,i965
--with-gallium-drivers=,swrast,radeonsi --with-vulkan-drivers=,intel,radeon
PYTHON2=/usr/bin/python2.7 --with-platforms=x11,surfaceless,wayland,drm
--enable-nine --enable-llvm --enable-omx --enable-va --enable-vdpau
--disable-xa --disable-xvmc --with-va-libdir=/usr/lib32/va/drivers
--disable-glx-read-only-text --disable-gallium-osmesa

Were my configure options, and LLVM was compiled with -mno-bmi 

I'm attaching the dumps