[llvm-branch-commits] [clang] [HLSL] Define the HLSLRootSignature Attr (PR #123985)

[Sarah Spall via llvm-branch-commits]

https://github.com/spall commented:

LGTM, I'm not familiar enough with root signature syntax to say if the tests are complete and the lexer/parser isn't included in this PR as far as I can tell, so I assume it works. 

https://github.com/llvm/llvm-project/pull/123985