[clang] [HLSL] Add empty struct test cases to `__builtin_hlsl_is_typed_resource_element_compatible` test file (PR #115045)

[Chris B via cfe-commits]

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@@ -2200,47 +2200,43 @@ static void BuildFlattenedTypeList(QualType BaseTy,
 }
 
 bool SemaHLSL::IsTypedResourceElementCompatible(clang::QualType QT) {
-  if (QT.isNull())
+  // null and array types are not allowed.
+  if (QT.isNull() || QT->isArrayType())
     return false;
 
-  // check if the outer type was an array type
-  if (QT->isArrayType())
+  // UDT types are not allowed
+  clang::QualType CanonicalType = QT.getCanonicalType();
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llvm-beanz wrote:

Most of the ways you're actually using this you likely don't need to query the canonical type. `QT->isRecordType()` will query the type of the canonical type directly.

https://github.com/llvm/llvm-project/pull/115045