[clang] [CUDA] Add support for __grid_constant__ attribute (PR #114589)

[Yaxun Liu via cfe-commits]

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@@ -1450,6 +1450,13 @@ def CUDAHost : InheritableAttr {
 }
 def : MutualExclusions<[CUDAGlobal, CUDAHost]>;
 
+def CUDAGridConstant : InheritableAttr {
+  let Spellings = [GNU<"grid_constant">, Declspec<"__grid_constant__">];
+  let Subjects = SubjectList<[ParmVar]>;
+  let LangOpts = [CUDA];
+  let Documentation = [Undocumented];
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yxsamliu wrote:

need documentation

https://github.com/llvm/llvm-project/pull/114589