[PATCH] D25204: Register Calling Convention, Clang changes

[Reid Kleckner via cfe-commits]

rnk added a comment.

Remember the fight over _Atomic with MSVC's STL? The fallacy of the implementer's namespace is that there is only one implementer.
https://llvm.org/bugs/show_bug.cgi?id=19043

We should prefer adding `__attribute__`s and `__declspec`s instead of keywords when possible.


https://reviews.llvm.org/D25204