[llvm] [CodeGen] TwoAddressInstructionPass - Control NumVisited limit via command line option (PR #84845)

[via llvm-commits]

AtariDreams wrote:

> Pulled out of comment made on #80627 - to simplify further investigation into visit limits.
> 
> 
> 
> We still need test coverage - we can either continue this patch here or @AtariDreams - I'm happy for this to be added to #80627

I can continue this patch

https://github.com/llvm/llvm-project/pull/84845