Add support for AVX512 masked vector blend intrinsics.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194006 91177308-0d34-0410-b5e6-96231b3b80d8
Use startswith_lower() where possible.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194007 91177308-0d34-0410-b5e6-96231b3b80d8
[docs] Add link to 32-bit ARM ELF supplement.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194011 91177308-0d34-0410-b5e6-96231b3b80d8