> >
> > with GCC configured with
> >
> > ../../gcc/configure
> > --prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r16-3364/usr
> > --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld
> > --with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet
> > --without-isl --enable-libmpx x86_64-linux --disable-bootstrap
> >
> > To reproduce:
> >
> > $ cd {build_dir}/gcc && make check
> > RUNTESTFLAGS="i386.exp=gcc.target/i386/shift-gf2p8affine-5.c
> > --target_board='unix{-m32\ -march=cascadelake}'"
Ah never mind it's there. The test breaks if you override
-march=... because it changes the vector cost model and then
the number of generated instructions is different.
I've seen that with other tuning options too.
I'll see how to fix that. Perhaps it just needs to specify its own
-march=generic which might take preference.
-Andi
