[PATCH] D122549: [VFS] RedirectingFileSystem only replace path if not already mapped

[Ben Barham via Phabricator via llvm-commits]

bnbarham updated this revision to Diff 418721.
bnbarham edited the summary of this revision.
bnbarham added a comment.

Rename `IsVFSMapped` as suggested by Duncan. Update comments.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D122549/new/

https://reviews.llvm.org/D122549

Files:
  clang/lib/Basic/FileManager.cpp
  clang/test/VFS/external-names-multi-overlay.c
  llvm/include/llvm/Support/VirtualFileSystem.h
  llvm/lib/Support/VirtualFileSystem.cpp
  llvm/unittests/Support/VirtualFileSystemTest.cpp

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