[clang] [CIR][CUDA] Handle local, __device__, __shared__, and __constant__ variables (PR #184248)

[Zaky Hermawan via cfe-commits]

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@@ -99,6 +106,15 @@ class TargetCIRGenInfo {
   /// right thing when calling a function with no know signature.
   virtual bool isNoProtoCallVariadic(const FunctionNoProtoType *fnType) const;
 
+  /// Provides a convenient hook to handle extra target-specific attributes
+  /// for the given global.
+  /// In OG, the function receives an llvm::GlobalValue. However, functions
+  /// and global variables are separate types in Clang IR, so we use a general
+  /// mlir::Operation*.
+  virtual void setTargetAttributes(const clang::Decl *decl,
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ZakyHermawan wrote:

This one cannot be deleted because it is used [here](https://github.com/llvm/llvm-project/pull/184248/changes#diff-81bc6cc583448bc99c35a497c37b89c731016a4ea02dd0a1c64763d5f0e9e117R803).

https://github.com/llvm/llvm-project/pull/184248