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Duncan P. N. Exon Smith e4b7b09efd VFS: Avoid some unnecessary std::string copies
Thread Twine a little deeper through the VFS to avoid unnecessarily
constructing the same std::string twice in a parameter sequence:

    Twine -> std::string -> StringRef -> std::string

Changing a few parameters from StringRef to Twine avoids the early call
to `Twine::str()`.

llvm-svn: 354739
2019-02-23 23:48:47 +00:00
2016-01-26 21:29:08 +00:00
2019-02-19 22:06:27 +00:00
2019-02-19 20:38:51 +00:00

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