[PATCH] D20266: [Modules] Use vfs for (recursive) directory iteration

[Bruno Cardoso Lopes via cfe-commits]

bruno created this revision.
bruno added a reviewer: benlangmuir.
bruno added a subscriber: cfe-commits.

Clang performs directory walk while searching headers inside modules by
using the ::sys::fs instead of ::vfs. This prevents any code that uses
the VFS (e.g, reproducer scripts) to actually find such headers, since
the VFS will never be searched for those.

Change these places to use vfs::recursive_directory_iterator and
vfs::directory_iterator instead.

http://reviews.llvm.org/D20266

Files:
  lib/Frontend/FrontendActions.cpp
  lib/Lex/HeaderSearch.cpp
  lib/Lex/ModuleMap.cpp
  test/Modules/crash-vfs-umbrella-frameworks.m

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