(In reply to Jose Fonseca from comment #6)
> It's not the first time LLVM misidentifies modern CPUs.
> 
> I thought that all the logic in
> src/gallium/auxiliary/gallivm/lp_bld_misc.cpp for setting +/-foo mattrs
> would save us from this sort of grief.

For features we already know about (I think I even mentioned that back then, 
hoping it wouldn't be a problem)...
If I look at the list of skylake features, I'd nearly bet the winner is avx512 
(and/or any subvariant).

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https://bugs.launchpad.net/bugs/1549849

Title:
  11.2.0-rc1: llvmpipe tests fail if built on skylake

Status in Mesa:
  Confirmed
Status in mesa package in Ubuntu:
  Triaged

Bug description:
  if built on broadwell all is well. 11.1 was fine, so it's a regression
  in 11.2.x

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