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

[Petar Avramovic via cfe-commits]

petar-avramovic wrote:

Is there some impact on existing feature checks in `tablegen instruction-seletor` ? Do we just move them before lowering, do we end up having same/similar check twice for code that compiles without errors?

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