[clang] [Clang][CodeGen][CUDA] Add missing null-check assertions in CGCUDARuntime (PR #181167)

[Oliver Hunt via cfe-commits]

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@@ -26,7 +26,7 @@ static llvm::Value *emitGetParamBuf(CodeGenFunction &CGF,
                                     const CUDAKernelCallExpr *E) {
   auto *GetParamBuf = CGF.getContext().getcudaGetParameterBufferDecl();
   const FunctionProtoType *GetParamBufProto =
-      GetParamBuf->getType()->getAs<FunctionProtoType>();
+      GetParamBuf->getType()->castAs<FunctionProtoType>();
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ojhunt wrote:

Unnecessary and incorrect change. LLM?

https://github.com/llvm/llvm-project/pull/181167