[PATCH] D52549: [VFS] Add a VFS wrapper which avoids opening nonexistent files by reading dirs.

[Sam McCall via Phabricator via cfe-commits]

sammccall updated this revision to Diff 167435.
sammccall added a comment.
Herald added a subscriber: mgrang.

Tests, tweaks to fix edge cases.


Repository:
  rC Clang

https://reviews.llvm.org/D52549

Files:
  include/clang/Basic/VirtualFileSystem.h
  lib/Basic/AvoidStatsVFS.cpp
  lib/Basic/CMakeLists.txt
  lib/Basic/VirtualFileSystem.cpp
  unittests/Basic/VirtualFileSystemTest.cpp

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