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Commit db8a7422 authored by Duncan P. N. Exon Smith's avatar Duncan P. N. Exon Smith
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Basic: Return a reference from FileManager::getVirtualFileSystem, NFC 

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

llvm-svn: 357038
parent 1da7eac8
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