nemanjai added a comment.

> You're right, -O0 shouldn't generate FMA. I'm preparing to revert this now -- 
> just verifying the build.

Perhaps this should be
`off` with no optimization
`on` with `-O1/-O2/-O3/-Os/-Oz`
`fast` with fast math

Just a suggestion, I'm not sure whether that would be the best breakdown. 
Perhaps we can also see what the defaults are for GCC and unify with those?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D74436/new/

https://reviews.llvm.org/D74436



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