dmgreen added a comment.

My understanding is that -mtune doesn't work sensibly for Arm backends. The 
tuning features and architecture features are not separated out at the 
subtarget level.
Is the idea to teach people to start using it? That sounds dangerous without 
fixing the issues with it first. Or is this to make sure it's set to something?

(Fixing it properly would be a really good thing.)


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D110258/new/

https://reviews.llvm.org/D110258

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