aaron.ballman added a comment.

In D126984#3571573 <https://reviews.llvm.org/D126984#3571573>, @aeubanks wrote:

> IIRC in the past there was a strong preference to not have the pass manager 
> support this sort of thing
> if you want to support this, there should be an RFC for how the optimization 
> part of this will work as it may require invasive changes to the LLVM pass 
> manager
>
> (if this is purely a clang frontend thing then ignore me)

Hmm, does the pass manager have to support anything here? The only Clang 
codegen changes are for emitting IR attributes that we already emitted based on 
command line flags/other attributes, so I had the impression this would not be 
invasive for the backend at all.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D126984/new/

https://reviews.llvm.org/D126984

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