[llvm] [LSV] Merge contiguous chains across scalar types (PR #154069)

[Anshil Gandhi via llvm-commits]

gandhi56 wrote:

> I've not looked at the LSV changes (leaving this to @arsenm), but I'll note that the IR test coverage here looks pretty weak for a significant change to the pass. The part I looked at (the Local.cpp changes) don't appear to have any test coverage at all.

Can this PR be merged, @arsenm ?

https://github.com/llvm/llvm-project/pull/154069