Duncan P. N. Exon Smith c17da8676a Support: Avoid std::tie in Support/FileSystem/UniqueID.h, NFC ...

Running `-fsyntax-only` on UniqueID.h is 2x faster with this patch
(which avoids calling `std::tie` for `operator<`).  Since the transitive
includers of this file will go up as `FileEntryRef` gets used in more
places, avoid that compile-time hit.  This is a follow-up to
23ed570af1 (suggested by Reid Kleckner).

Also drop the `<tuple>` include from FileSystem.h (which was vestigal
from before UniqueID.h was split out).

Differential Revision: https://reviews.llvm.org/D90471

2020-11-02 13:26:15 -05:00

1.2 KiB

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