[llvm] Add a pass to collect dropped var stats for MIR (PR #120780)

[Nikita Popov via llvm-commits]

nikic wrote:

I have already commented on this three times...

https://github.com/llvm/llvm-project/pull/115566#discussion_r1847990774
https://github.com/llvm/llvm-project/pull/117044#issuecomment-2515692928
https://github.com/llvm/llvm-project/pull/120501#issuecomment-2553484273

...and my feedback still hasn't been addressed.

If you reapply this again without actually addressing the problems with this patch, I will request your commit access to be withdrawn.

https://github.com/llvm/llvm-project/pull/120780