[PATCH] D74777: [VFS][WIP] More consistent handling of hybrid paths of Windows+Posix styles

[Adrian McCarthy via Phabricator via llvm-commits]

amccarth created this revision.
amccarth added reviewers: john.brawn, rnk.
Herald added a subscriber: hiraditya.
Herald added a project: LLVM.

This is a counter-proposal to the fix suggested in

  https://reviews.llvm.org/D74488

VFS paths can be a hybrid of Windows and Posix styles, so the sys::path methods sometimes cannot handle them.  This generalizes the VFS-specific canonicalize function to remove traversal components from these possibly hybrid paths.

THIS NEEDS TESTS.


https://reviews.llvm.org/D74777

Files:
  llvm/lib/Support/VirtualFileSystem.cpp

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