[llvm] Add a pass to collect dropped var statistics for MIR (PR #126686)

[Shubham Sandeep Rastogi via llvm-commits]

rastogishubham wrote:

> The new patch addresses my concerns. I assume someone else has already reviewed the original patch in more detail.

Yes, it has already been reviewed earlier in detail

https://github.com/llvm/llvm-project/pull/126686