just dropping AVX512 didn't fix skylake, but looking at current lib/Target/X86/X86.td there are several features getting enabled which are separated in 3.9 to apply only to server CPU's
just dropping AVX512 didn't fix skylake, but looking at current lib/Target/ X86/X86. td there are several features getting enabled which are separated in 3.9 to apply only to server CPU's