diff --git a/lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwiftTypeRef.cpp b/lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwiftTypeRef.cpp
index 5452c7cfa48ea..a1c446c9e0a9f 100644
--- a/lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwiftTypeRef.cpp
+++ b/lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwiftTypeRef.cpp
@@ -203,6 +203,30 @@ ResolveTypeAlias(SwiftASTContext *module_holder,
   return {n, {}};
 }
 
+std::string
+TypeSystemSwiftTypeRef::GetTupleElementName(lldb::opaque_compiler_type_t type,
+                                            size_t idx) {
+  using namespace swift::Demangle;
+  Demangler dem;
+  NodePointer node = TypeSystemSwiftTypeRef::DemangleCanonicalType(dem, type);
+  if (!node || node->getKind() != Node::Kind::Tuple)
+    return "";
+  if (node->getNumChildren() < idx)
+    return "";
+  NodePointer child = node->getChild(idx);
+  if (child->getNumChildren() != 1 &&
+      child->getKind() != Node::Kind::TupleElement)
+    return "";
+  for (NodePointer name : *child) {
+    if (name->getKind() != Node::Kind::TupleElementName)
+      continue;
+    return name->getText().str();
+  }
+  std::string name;
+  llvm::raw_string_ostream(name) << idx;
+  return name;
+}
+
 swift::Demangle::NodePointer TypeSystemSwiftTypeRef::Transform(
     swift::Demangle::Demangler &dem, swift::Demangle::NodePointer node,
     std::function<swift::Demangle::NodePointer(swift::Demangle::NodePointer)>
diff --git a/lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwiftTypeRef.h b/lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwiftTypeRef.h
index aa1fc235b9701..b43ff7ab4236a 100644
--- a/lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwiftTypeRef.h
+++ b/lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwiftTypeRef.h
@@ -258,6 +258,10 @@ class TypeSystemSwiftTypeRef : public TypeSystemSwift {
       bool print_help_if_available, bool print_extensions_if_available,
       lldb::DescriptionLevel level = lldb::eDescriptionLevelFull) override;
 
+  /// Return the nth tuple element's name, if it has one.
+  std::string GetTupleElementName(lldb::opaque_compiler_type_t type,
+                                  size_t idx);
+
   /// Recursively transform the demangle tree starting a \p node by
   /// doing a post-order traversal and replacing each node with
   /// fn(node).
diff --git a/lldb/source/Target/SwiftLanguageRuntimeDynamicTypeResolution.cpp b/lldb/source/Target/SwiftLanguageRuntimeDynamicTypeResolution.cpp
index 11b819e4ddfdc..5900ae2e323dd 100644
--- a/lldb/source/Target/SwiftLanguageRuntimeDynamicTypeResolution.cpp
+++ b/lldb/source/Target/SwiftLanguageRuntimeDynamicTypeResolution.cpp
@@ -280,6 +280,20 @@ class LLDBMemoryReader : public swift::remote::MemoryReader {
   bool queryDataLayout(DataLayoutQueryType type, void *inBuffer,
                        void *outBuffer) override {
     switch (type) {
+    // FIXME: add support for case DLQ_GetPtrAuthMask:
+    case DLQ_GetObjCReservedLowBits: {
+      auto *result = static_cast<uint8_t *>(outBuffer);
+      auto &triple = m_process.GetTarget().GetArchitecture().GetTriple();
+      if (triple.isMacOSX() && triple.getArch() == llvm::Triple::x86_64) {
+        // Obj-C reserves low bit on 64-bit Intel macOS only.
+        // Other Apple platforms don't reserve this bit (even when
+        // running on x86_64-based simulators).
+        *result = 1;
+      } else {
+        *result = 0;
+      }
+      break;
+    }
     case DLQ_GetPointerSize: {
       auto result = static_cast<uint8_t *>(outBuffer);
       *result = m_process.GetAddressByteSize();
diff --git a/lldb/unittests/Symbol/TestTypeSystemSwiftTypeRef.cpp b/lldb/unittests/Symbol/TestTypeSystemSwiftTypeRef.cpp
index 19d8b54953fae..6bac7e019f81f 100644
--- a/lldb/unittests/Symbol/TestTypeSystemSwiftTypeRef.cpp
+++ b/lldb/unittests/Symbol/TestTypeSystemSwiftTypeRef.cpp
@@ -126,7 +126,7 @@ TEST_F(TestTypeSystemSwiftTypeRef, Function) {
     CompilerType void_void = GetCompilerType(b.Mangle(n));
     ASSERT_TRUE(void_void.IsFunctionType(nullptr));
     ASSERT_TRUE(void_void.IsFunctionPointerType());
-    ASSERT_EQ(void_void.GetNumberOfFunctionArguments(), 0);
+    ASSERT_EQ(void_void.GetNumberOfFunctionArguments(), 0UL);
   }
   {
     NodePointer n = b.GlobalType(
@@ -134,7 +134,7 @@ TEST_F(TestTypeSystemSwiftTypeRef, Function) {
                b.Node(Node::Kind::ImplConvention, "@callee_guaranteed")));
     CompilerType impl_void_void = GetCompilerType(b.Mangle(n));
     ASSERT_TRUE(impl_void_void.IsFunctionType(nullptr));
-    ASSERT_EQ(impl_void_void.GetNumberOfFunctionArguments(), 0);
+    ASSERT_EQ(impl_void_void.GetNumberOfFunctionArguments(), 0UL);
   }
   {
     NodePointer n = b.GlobalType(b.Node(
@@ -147,7 +147,7 @@ TEST_F(TestTypeSystemSwiftTypeRef, Function) {
                b.Node(Node::Kind::Tuple))));
     CompilerType impl_two_args = GetCompilerType(b.Mangle(n));
     ASSERT_TRUE(impl_two_args.IsFunctionType(nullptr));
-    ASSERT_EQ(impl_two_args.GetNumberOfFunctionArguments(), 2);
+    ASSERT_EQ(impl_two_args.GetNumberOfFunctionArguments(), 2UL);
     ASSERT_EQ(impl_two_args.GetFunctionArgumentAtIndex(0), int_type);
     ASSERT_EQ(impl_two_args.GetFunctionArgumentAtIndex(1), void_type);
     ASSERT_EQ(impl_two_args.GetFunctionArgumentTypeAtIndex(0), int_type);
@@ -167,7 +167,7 @@ TEST_F(TestTypeSystemSwiftTypeRef, Function) {
                b.Node(Node::Kind::Type, b.Node(Node::Kind::Tuple)))));
     CompilerType two_args = GetCompilerType(b.Mangle(n));
     ASSERT_TRUE(two_args.IsFunctionType(nullptr));
-    ASSERT_EQ(two_args.GetNumberOfFunctionArguments(), 2);
+    ASSERT_EQ(two_args.GetNumberOfFunctionArguments(), 2UL);
     ASSERT_EQ(two_args.GetFunctionArgumentAtIndex(0), int_type);
     ASSERT_EQ(two_args.GetFunctionArgumentAtIndex(1), void_type);
     ASSERT_EQ(two_args.GetFunctionArgumentTypeAtIndex(0), int_type);
@@ -306,7 +306,7 @@ TEST_F(TestTypeSystemSwiftTypeRef, Scalar) {
     uint32_t count = 99;
     bool is_complex = true;
     ASSERT_FALSE(int_type.IsFloatingPointType(count, is_complex));
-    ASSERT_EQ(count, 0);
+    ASSERT_EQ(count, 0UL);
     ASSERT_EQ(is_complex, false);
     bool is_signed = true;
     ASSERT_TRUE(int_type.IsIntegerType(is_signed));
@@ -318,7 +318,7 @@ TEST_F(TestTypeSystemSwiftTypeRef, Scalar) {
     uint32_t count = 99;
     bool is_complex = true;
     ASSERT_TRUE(float_type.IsFloatingPointType(count, is_complex));
-    ASSERT_EQ(count, 1);
+    ASSERT_EQ(count, 1UL);
     ASSERT_EQ(is_complex, false);
     bool is_signed = true;
     ASSERT_FALSE(float_type.IsIntegerType(is_signed));
@@ -402,6 +402,20 @@ TEST_F(TestTypeSystemSwiftTypeRef, Tuple) {
     ASSERT_EQ(float_int_tuple.GetMangledTypeName(),
               "$ss0019BuiltinFPIEEE_CJEEdV1f_s0016BuiltinInt_gCJAcV1itD");
   }
+  {
+    NodePointer n = b.GlobalType(
+        b.Node(Node::Kind::Tuple,
+               b.Node(Node::Kind::TupleElement,
+                      b.Node(Node::Kind::TupleElementName, "x"), b.IntType()),
+               b.Node(Node::Kind::TupleElement, b.IntType()),
+               b.Node(Node::Kind::TupleElement,
+                      b.Node(Node::Kind::TupleElementName, "z"), b.IntType())));
+    CompilerType t = GetCompilerType(b.Mangle(n));
+    lldb::opaque_compiler_type_t o = t.GetOpaqueQualType();
+    ASSERT_EQ(m_swift_ts.GetTupleElementName(o, 0), "x");
+    ASSERT_EQ(m_swift_ts.GetTupleElementName(o, 1), "1");
+    ASSERT_EQ(m_swift_ts.GetTupleElementName(o, 2), "z");
+  }
 }
 
 TEST_F(TestTypeSystemSwiftTypeRef, TypeClass) {