Fix the MSVC 2010 build

C++11-style forward declared enums weren't supported until MSVC 2012.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197992 91177308-0d34-0410-b5e6-96231b3b80d8
Add missing pattern matches to support ACLE intrinsics of AArch64 NEON.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197993 91177308-0d34-0410-b5e6-96231b3b80d8