[LLDB] Remove fallback for Builtin.Object

rdar://161435435

Author: adrian-prantl

lldb/source/Plugins/LanguageRuntime/Swift/SwiftLanguageRuntimeDynamicTypeResolution.cpp

@@ -1077,6 +1077,10 @@ SwiftRuntimeTypeVisitor::VisitImpl(std::optional<unsigned> visit_only,
 
     // Try the instance type metadata.
     if (!m_valobj) {
+      // Static builtin types have no children.
+      if (ts.IsBuiltinType(m_type))
+        return 0;
+
       LLDBTypeInfoProvider tip(m_runtime, ts);
       auto cti_or_err = reflection_ctx->GetClassInstanceTypeInfo(
           *tr, &tip, ts.GetDescriptorFinder());

lldb/test/API/lang/swift/variables/func/TestSwiftFunctionVariables.py

@@ -32,6 +32,8 @@ def test_function_variables(self):
         # Get the function pointer variable from our frame
         func_ptr_value = self.frame().FindVariable('func_ptr')
         self.assertEqual(func_ptr_value.GetNumChildren(), 2)
+        self.assertEqual(func_ptr_value.GetChildAtIndex(0).GetNumChildren(), 0)
+        self.assertEqual(func_ptr_value.GetChildAtIndex(1).GetNumChildren(), 0)
 
         # Grab the function pointer value as an unsigned load address
         func_ptr_addr = func_ptr_value.GetValueAsUnsigned()
@@ -46,4 +48,3 @@ def test_function_variables(self):
         # Make sure the function pointer correctly resolved to our a.bar
         # function
         self.assertEqual('a.bar() -> ()', func_ptr_function.name)
-