[PATCH] D91317: Support: Add RedirectingFileSystem::create from simple list of redirections

[Duncan P. N. Exon Smith via Phabricator via llvm-commits]

dexonsmith created this revision.
dexonsmith added reviewers: JDevlieghere, jansvoboda11.
Herald added subscribers: llvm-commits, ributzka, hiraditya.
Herald added a project: LLVM.
dexonsmith requested review of this revision.

Add an overload of `RedirectingFileSystem::create` that builds a
redirecting filesystem off of a simple vector of string pairs. This is
intended to be used to support `clang::arcmt::FileRemapper` and
`clang::PreprocessorOptions::RemappedFiles`.


https://reviews.llvm.org/D91317

Files:
  llvm/include/llvm/Support/VirtualFileSystem.h
  llvm/lib/Support/VirtualFileSystem.cpp
  llvm/unittests/Support/VirtualFileSystemTest.cpp

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