[PATCH] D20401: [Lexer] Don't merge macro args from different macro files

[Sam McCall via Phabricator via cfe-commits]

sammccall added a comment.

Started a thread: https://discourse.llvm.org/t/macro-performance-lexer-and-sourcemanager/65713


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D20401/new/

https://reviews.llvm.org/D20401