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

[Roman Lebedev via Phabricator via cfe-commits]

lebedev.ri added a comment.

> The `__remove_cv` test sees a 160% build time imporvement while the `__add_cv` test sees an 8% improvement.

Those numbers are specifically for those macrobenchmarks, right?
What impact does this have on some real-world code?
I'm just curious as to cost/benefit here.


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

https://reviews.llvm.org/D67588