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

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mmjjpp wrote:

> [mmjjpp#16](https://github.com/mmjjpp/llvm-project/pull/16) [ThinLTO][Driver] Move split-codegen partition merge out of LTOBackend



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