Uros Bizjak wrote:
> On Fri, Oct 5, 2018@1:01 AM H.J. Lu wrote:
> > diff --git a/gcc/config/i386/gnu-user.h b/gcc/config/i386/gnu-user.h
> > index a922c9b93fa..baed87aa54f 100644
> > --- a/gcc/config/i386/gnu-user.h
> > +++ b/gcc/config/i386/gnu-user.h
> > @@ -67,7 +67,7 @@ along with GCC; see th
On Fri, Oct 5, 2018 at 1:01 AM H.J. Lu wrote:
>
>
> With
>
> gcc -O2 -fPIC -flto -g -c -o a.o a.c
> gcc -O2 -fPIC -flto -g -mavx -c -o b.o b.c
> gcc -shared -O2 -fPIC -flto -g -o lib1.so a.o b.o
>
> LTO correctly generates AVX for b.o and SSE for a.o. But the GCC driver
> passes -msse2avx to as
With
gcc -O2 -fPIC -flto -g -c -o a.o a.c
gcc -O2 -fPIC -flto -g -mavx -c -o b.o b.c
gcc -shared -O2 -fPIC -flto -g -o lib1.so a.o b.o
LTO correctly generates AVX for b.o and SSE for a.o. But the GCC driver
passes -msse2avx to assembler, which encodes SSE instructions as AVX
instructions. W
