[PATCH] D145397: [Lex] Use line markers in preprocessed assembly predefines file

[John Brawn via Phabricator via cfe-commits]

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GNU line marker directives are not recognised when preprocessing assembly files, meaning they can't be used in the predefines file meaning macros defined on the command line are reported as being built-in.

Change this to permit line markers but only in the predefines file, so we can correctly report command line macros as coming from the command line.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D145397

Files:
  clang/lib/Frontend/InitPreprocessor.cpp
  clang/lib/Lex/PPDirectives.cpp
  clang/test/Preprocessor/directives_asm.S
  clang/test/Preprocessor/macro_redefined.S

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