[clang] [Clang][NVPTX] fix `no member named 'this_cluster'` (PR #187039)

[Durgadoss R via cfe-commits]

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@@ -184,6 +184,12 @@ void NVPTXTargetInfo::getTargetDefines(const LangOptions &Opts,
     unsigned ArchID = CudaArchToID(GPU);
     Builder.defineMacro("__CUDA_ARCH__", llvm::Twine(ArchID));
 
+    // Per
+    // https://docs.nvidia.com/cuda/cuda-programming-guide/04-special-topics/cooperative-groups.html#id4
+    // clusters are only available with >=9.0 compute capability
+    if (ArchID >= 900)
+      Builder.defineMacro("_CG_CLUSTER_INTRINSICS_AVAILABLE");
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durga4github wrote:

ok, I see the macro in `.../details/info.h` and the change LGTM.

Please wait for @Artem-B 's review before landing.

https://github.com/llvm/llvm-project/pull/187039