[llvm-bugs] [Bug 31817] AVX512 Regression: KNL backend does not use KNL processor features, SKX works

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=31817

Wenzel Jakob <wenzel.jakob at epfl.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #3 from Wenzel Jakob <wenzel.jakob at epfl.ch> ---
You are right! -- and my bug report was nonsense. I had always assumed that the
extension to 32 registers and broadcasting were part of the EVEX encoding in
AVX512F and thus also applied to XMM* and YMM* on KNL. But they clearly aren't
(my KNL machine nicely confirms this by generating segfaults when it executes
these instructions).

Thank you for the clarification, and sorry about the noise!

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