[clang] [llvm] [RFC][CodeGen] Add generic target feature checks for intrinsics (PR #201470)

[Sameer Sahasrabuddhe via cfe-commits]

https://github.com/ssahasra approved this pull request.

The overall shape of things looks good to me. I didn't think through the details of the implementation. Please do give other reviewers a chance to comment.

https://github.com/llvm/llvm-project/pull/201470