[all-commits] [llvm/llvm-project] ad7aaa: Frontend: Fix layering between create{, Default}Out...

[Duncan P. N. Exon Smith via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: ad7aaa475e5e632242b07380ec47d2f35d077209
      https://github.com/llvm/llvm-project/commit/ad7aaa475e5e632242b07380ec47d2f35d077209
  Author: Duncan P. N. Exon Smith <dexonsmith at apple.com>
  Date:   2021-01-26 (Tue, 26 Jan 2021)

  Changed paths:
    M clang/include/clang/Frontend/CompilerInstance.h
    M clang/lib/Frontend/CompilerInstance.cpp
    M clang/lib/Frontend/FrontendActions.cpp
    M clang/tools/driver/cc1_main.cpp

  Log Message:
  -----------
  Frontend: Fix layering between create{,Default}OutputFile, NFC

Fix layering between `CompilerInstance::createDefaultOutputFile` and the
two versions of `createOutputFile`.

- Add missing configuration flags to `createDefaultOutputFile` so that
  GeneratePCHAction and GenerateModuleFromModuleMapAction can use it.
  They previously promised that temporary files were turned on; now
  `createDefaultOutputFile` handles that logic.
- Lift the logic handling `InFile` and `Extension` to
  `createDefaultOutputFile`, since it's only the callers of that
  function that are using it.
- Rename the deeper of the two `createOutputFile`s to
  `createOutputFileImpl` and make it private to `CompilerInstance` (to
  prove that no one else is using it).
- Sink the logic for adding to `CompilerInstance::OutputFiles` down to
  `createOutputFileImpl`, allowing two "optional" (but always used)
  `std::string*` out parameters to be removed.
- Instead of passing a `std::error_code` out parameter into
  `createOutputFileImpl`, have it return `Expected<>`.
- As a drive-by, inline `CompilerInstance::addOutputFile` into its only
  caller, `createOutputFileImpl`.

Clean layering makes it easier for a future commit to extract
`createOutputFileImpl` out of `CompilerInstance`.

Differential Revision: https://reviews.llvm.org/D93248