[PATCH] D52838: [COFF, ARM64] Add __getReg intrinsic

[Eli Friedman via Phabricator via cfe-commits]

efriedma added a comment.

Needs a testcase for the error message like we have for other intrinsics in test/Sema/builtins-arm64.c .  Otherwise LGTM.


https://reviews.llvm.org/D52838