[llvm] [GlobalMerge] Add MinSize feature to the GlobalMerge Pass. (PR #93686)

[Philip Reames via llvm-commits]

preames wrote:

I don't remember off the top of my head what SmallDataLimit represents, and am not finding it documented in LangRef.  Is this related to GP relative addressing?  Or something else?

Code wise, this looks pretty straight forward.  I just want to make sure I understand the intent.  

https://github.com/llvm/llvm-project/pull/93686