[llvm] Add a pass to collect dropped variable statistics (PR #102233)

[Adrian Prantl via llvm-commits]

adrian-prantl wrote:

> The dropped statistics for the updated patch are:
> 
> AlwaysInlinerPass, 2 

Inlining shouldn't really be dropping any variables — how do these happen / do they make sense?


https://github.com/llvm/llvm-project/pull/102233