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

[Shilei Tian via cfe-commits]

shiltian wrote:

> Why do the checks during instruction selection, instead of in the IR verifier?

IR verifier doesn't depend on code generation because it is LLVMCore.

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