llvm-project

fbf08a68 - [ObjectiveC] -rewrite-objc was treating inputs as preprocessed files (#137623)

[ObjectiveC] -rewrite-objc was treating inputs as preprocessed files (#137623) `-rewrite-objc` passes `-x objective-c++-cpp-output` as input type to the preprocessor job. This is not correct since we would be preprocessing a preprocessed file. The correct input type is `objective-c++`.