[llvm] [RFC][LTO] Allow target-specific module splittting (PR #83128)

[Teresa Johnson via llvm-commits]

https://github.com/teresajohnson commented:

@pcc who implemented split LTO code gen

I am not a user of this functionality, but it seems reasonable to me. It would be good to see the companion PR with the use case as well when reviewing.

https://github.com/llvm/llvm-project/pull/83128