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

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mmjjpp wrote:

Yes, “import” was imprecise here; I meant “clone.” The behavior is to conservatively clone private and internal globals into every output partition, and dealWithMpart removes any unused copies afterward.

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