https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86735
Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
An observation in case it might help to narrow down the problem: gcc-8 changed
to prefer 256-bit-wide vectors on skylake-avx512, so adding
-mprefer-vector-width=512 option for gcc-8/trunk should make vectorization
behave a bit closer to gcc-7.
