[clang] [NVPTX] Add support for maxclusterrank in launch_bounds (PR #66496)

[Artem Belevich via cfe-commits]

================
@@ -5607,6 +5607,21 @@ bool Sema::CheckRegparmAttr(const ParsedAttr &AL, unsigned &numParams) {
   return false;
 }
 
+// Helper to get CudaArch.
+static CudaArch getCudaArch(const TargetInfo &TI) {
----------------
Artem-B wrote:

You may need to verify that `TI->getTriple()->isNVPTX()` before casting, but other than that, LGTM.


https://github.com/llvm/llvm-project/pull/66496