[PATCH] D59388: Basic: Return a reference from FileManager::getVirtualFileSystem, NFC

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

dexonsmith created this revision.
dexonsmith added reviewers: arphaman, Bigcheese, bruno.
Herald added subscribers: jdoerfert, kadircet, jkorous, ioeric.
Herald added a reviewer: martong.
Herald added a reviewer: shafik.

FileManager constructs a VFS in its constructor if it isn't passed one,
and there's no way to reset it.  Make that contract clear by returning a
reference from its accessor.


https://reviews.llvm.org/D59388

Files:
  clang-tools-extra/clang-move/ClangMove.cpp
  clang-tools-extra/clang-tidy/ClangTidy.cpp
  clang-tools-extra/clangd/SourceCode.cpp
  clang/include/clang/Basic/FileManager.h
  clang/include/clang/Frontend/CompilerInstance.h
  clang/lib/Frontend/ASTUnit.cpp
  clang/lib/Frontend/CompilerInstance.cpp
  clang/lib/Frontend/FrontendAction.cpp
  clang/lib/Lex/HeaderSearch.cpp
  clang/lib/Lex/ModuleMap.cpp
  clang/lib/Lex/PPLexerChange.cpp
  clang/lib/Sema/SemaCodeComplete.cpp
  clang/lib/Tooling/Tooling.cpp
  clang/unittests/AST/ASTImporterTest.cpp

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