[clang] [llvm] [ThinLTO][Split] Split module for parallel compilation in backend (1/N) (PR #198702)

[Teresa Johnson via cfe-commits]

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teresajohnson wrote:

Do we need both of these flags or can the latter one be inferred from the former's value? If there must be 2 you probably need some error checking for invalid combinations? But I think moving to one is simpler.

https://github.com/llvm/llvm-project/pull/198702