[flang-commits] [clang] [flang] [lld] [lldb] [llvm] clang/AMDGPU: Validate -target-cpu in cc1 is valid for the subarch (PR #206481)

[Matt Arsenault via flang-commits]

arsenm wrote:

> It seems like after this we might be able to make the second parameter to `fillValidArchListAMDGCN`? Is there a valid use-case for the `NoArch` version?

The diagnostic for __builtin_amdgcn_processor_is makes use of it


https://github.com/llvm/llvm-project/pull/206481