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diff --git a/llvm/lib/TextAPI/MachO/TextStubCommon.h b/llvm/lib/TextAPI/MachO/TextStubCommon.h
new file mode 100644
index 00000000000..1b88cd3b7ce
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+++ b/llvm/lib/TextAPI/MachO/TextStubCommon.h
@@ -0,0 +1,83 @@
+//===- llvm/TextAPI/TextStubCommon.h - Text Stub Common ---------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief Defines common Text Stub YAML mappings.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TEXTAPI_TEXT_STUB_COMMON_H
+#define LLVM_TEXTAPI_TEXT_STUB_COMMON_H
+
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/Support/YAMLTraits.h"
+#include "llvm/TextAPI/MachO/Architecture.h"
+#include "llvm/TextAPI/MachO/ArchitectureSet.h"
+#include "llvm/TextAPI/MachO/InterfaceFile.h"
+#include "llvm/TextAPI/MachO/PackedVersion.h"
+
+using UUID = std::pair<llvm::MachO::Architecture, std::string>;
+
+LLVM_YAML_STRONG_TYPEDEF(llvm::StringRef, FlowStringRef)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, SwiftVersion)
+LLVM_YAML_IS_FLOW_SEQUENCE_VECTOR(UUID)
+LLVM_YAML_IS_FLOW_SEQUENCE_VECTOR(FlowStringRef)
+
+namespace llvm {
+namespace yaml {
+
+template <> struct ScalarTraits<FlowStringRef> {
+  static void output(const FlowStringRef &, void *, raw_ostream &);
+  static StringRef input(StringRef, void *, FlowStringRef &);
+  static QuotingType mustQuote(StringRef);
+};
+
+template <> struct ScalarEnumerationTraits<MachO::ObjCConstraint> {
+  static void enumeration(IO &, MachO::ObjCConstraint &);
+};
+
+template <> struct ScalarTraits<MachO::Platform> {
+  static void output(const MachO::Platform &, void *, raw_ostream &);
+  static StringRef input(StringRef, void *, MachO::Platform &);
+  static QuotingType mustQuote(StringRef);
+};
+
+template <> struct ScalarBitSetTraits<MachO::ArchitectureSet> {
+  static void bitset(IO &, MachO::ArchitectureSet &);
+};
+
+template <> struct ScalarTraits<MachO::Architecture> {
+  static void output(const MachO::Architecture &, void *, raw_ostream &);
+  static StringRef input(StringRef, void *, MachO::Architecture &);
+  static QuotingType mustQuote(StringRef);
+};
+
+template <> struct ScalarTraits<MachO::PackedVersion> {
+  static void output(const MachO::PackedVersion &, void *, raw_ostream &);
+  static StringRef input(StringRef, void *, MachO::PackedVersion &);
+  static QuotingType mustQuote(StringRef);
+};
+
+template <> struct ScalarTraits<SwiftVersion> {
+  static void output(const SwiftVersion &, void *, raw_ostream &);
+  static StringRef input(StringRef, void *, SwiftVersion &);
+  static QuotingType mustQuote(StringRef);
+};
+
+template <> struct ScalarTraits<UUID> {
+  static void output(const UUID &, void *, raw_ostream &);
+  static StringRef input(StringRef, void *, UUID &);
+  static QuotingType mustQuote(StringRef);
+};
+
+} // end namespace yaml.
+} // end namespace llvm.
+
+#endif // LLVM_TEXTAPI_TEXT_STUB_COMMON_H