[PATCH] D67588: Add builtin trait for add/remove cv (and similar)

[Zoe Carver via Phabricator via cfe-commits]

zoecarver added a comment.

@lebedev.ri after adding _only_ these builtins to libc++ the type trait tests run several seconds faster. I think if we update _all_ the type traits to use builtins then, it could increase speed of the type trait tests by as much as 50% (if not more).


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  https://reviews.llvm.org/D67588/new/

https://reviews.llvm.org/D67588