[all-commits] [llvm/llvm-project] 1b53aa: [ThinLTO][NFC] Refactor ThinBackend (#110461)

[Kyungwoo Lee via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1b53aaec55b6cdf0c9cf09b9cbdc53992e1b50ae
      https://github.com/llvm/llvm-project/commit/1b53aaec55b6cdf0c9cf09b9cbdc53992e1b50ae
  Author: Kyungwoo Lee <kyulee at meta.com>
  Date:   2024-10-07 (Mon, 07 Oct 2024)

  Changed paths:
    M llvm/include/llvm/LTO/LTO.h
    M llvm/lib/LTO/LTO.cpp

  Log Message:
  -----------
  [ThinLTO][NFC] Refactor ThinBackend (#110461)

This is a prep for https://github.com/llvm/llvm-project/pull/90933.
 
 - Change `ThinBackend` from a function to a type.
 - Store the parallelism level in the type, which will be used when creating two-codegen round backends that inherit this value.
 - `ThinBackendProc` is hoisted to `LTO.h` from `LTO.cpp` to provide its body for `ThinBackend`. However, `emitFiles()` is still implemented separately in `LTO.cpp`, distinct from its parent class.



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