https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84786
--- Comment #2 from Matthias Kretz <kretz at kde dot org> --- Created attachment 43618 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43618&action=edit unreduced testcase Compile with `g++ -std=c++17 -O2 -march=knl -o knl-fail knl-fail.cpp`. The function `Tests::operators_<Vc::v2::simd<double, Vc::v2::detail::avx_abi<32> > >::run()` countains the invalid instructions. % g++-7 --version g++-7 (Ubuntu 7.2.0-1ubuntu1~16.04) 7.2.0