[clang] [CUDA] Treat function-scope statics in device code as device variables (PR #222985)

[Ambrose Leeb via cfe-commits]

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@@ -764,8 +764,26 @@ void SemaCUDA::checkAllowedInitializer(VarDecl *VD) {
   if (VD->isInvalidDecl() || !VD->hasInit() || !VD->hasGlobalStorage() ||
       IsDependentVar(VD))
     return;
+
+  // A function-scope static is a device variable when it is emitted on the
+  // device side, and has the same initialization restrictions.
+  CUDAVariableTarget VT = IdentifyTarget(VD);
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Sirraide wrote:

I checked the implementation of `IdentifyTarget()`, and it should be updated to use `getEnclosingFunction()` rather than attempting to cast the parent `DeclContext` of the `VarDecl` directly

https://github.com/llvm/llvm-project/pull/222985