diff --git a/llvm/include/llvm/TextAPI/MachO/Architecture.h b/llvm/include/llvm/TextAPI/MachO/Architecture.h
--- a/llvm/include/llvm/TextAPI/MachO/Architecture.h
+++ b/llvm/include/llvm/TextAPI/MachO/Architecture.h
@@ -14,6 +14,7 @@
 #define LLVM_TEXTAPI_MACHO_ARCHITECTURE_H
 
 #include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Triple.h"
 #include "llvm/Support/raw_ostream.h"
 
 namespace llvm {
@@ -39,6 +40,9 @@
 /// Convert an architecture slice to a CPU Type and Subtype pair.
 std::pair<uint32_t, uint32_t> getCPUTypeFromArchitecture(Architecture Arch);
 
+/// Convert a target to an architecture slice.
+Architecture mapToArchitecture(const llvm::Triple &Target);
+
 raw_ostream &operator<<(raw_ostream &OS, Architecture Arch);
 
 } // end namespace MachO.
diff --git a/llvm/include/llvm/TextAPI/MachO/ArchitectureSet.h b/llvm/include/llvm/TextAPI/MachO/ArchitectureSet.h
--- a/llvm/include/llvm/TextAPI/MachO/ArchitectureSet.h
+++ b/llvm/include/llvm/TextAPI/MachO/ArchitectureSet.h
@@ -59,6 +59,10 @@
 
   ArchSetType rawValue() const { return ArchSet; }
 
+  bool hasX86() const {
+    return has(AK_i386) || has(AK_x86_64) || has(AK_x86_64h);
+  }
+
   template <typename Ty>
   class arch_iterator
       : public std::iterator<std::forward_iterator_tag, Architecture, size_t> {
diff --git a/llvm/include/llvm/TextAPI/MachO/InterfaceFile.h b/llvm/include/llvm/TextAPI/MachO/InterfaceFile.h
--- a/llvm/include/llvm/TextAPI/MachO/InterfaceFile.h
+++ b/llvm/include/llvm/TextAPI/MachO/InterfaceFile.h
@@ -26,21 +26,13 @@
 #include "llvm/TextAPI/MachO/Architecture.h"
 #include "llvm/TextAPI/MachO/ArchitectureSet.h"
 #include "llvm/TextAPI/MachO/PackedVersion.h"
+#include "llvm/TextAPI/MachO/Platform.h"
 #include "llvm/TextAPI/MachO/Symbol.h"
+#include "llvm/TextAPI/MachO/Target.h"
 
 namespace llvm {
 namespace MachO {
 
-/// Defines the list of MachO platforms.
-enum class PlatformKind : unsigned {
-  unknown,
-  macOS = MachO::PLATFORM_MACOS,
-  iOS = MachO::PLATFORM_IOS,
-  tvOS = MachO::PLATFORM_TVOS,
-  watchOS = MachO::PLATFORM_WATCHOS,
-  bridgeOS = MachO::PLATFORM_BRIDGEOS,
-};
-
 /// Defines a list of Objective-C constraints.
 enum class ObjCConstraintType : unsigned {
   /// No constraint.
@@ -89,29 +81,42 @@
 
   InterfaceFileRef(StringRef InstallName) : InstallName(InstallName) {}
 
-  InterfaceFileRef(StringRef InstallName, ArchitectureSet Archs)
-      : InstallName(InstallName), Architectures(Archs) {}
+  InterfaceFileRef(StringRef InstallName, const TargetList Targets)
+      : InstallName(InstallName), Targets(std::move(Targets)) {}
 
   StringRef getInstallName() const { return InstallName; };
-  void addArchitectures(ArchitectureSet Archs) { Architectures |= Archs; }
-  ArchitectureSet getArchitectures() const { return Architectures; }
-  bool hasArchitecture(Architecture Arch) const {
-    return Architectures.has(Arch);
+
+  void addTarget(const Target &Target);
+  template <typename RangeT> void addTargets(RangeT &&Targets) {
+    for (const auto &Target : Targets)
+      addTarget(Target(Target));
   }
 
+  using const_target_iterator = TargetList::const_iterator;
+  using const_target_range = llvm::iterator_range<const_target_iterator>;
+  const_target_range targets() const { return {Targets}; }
+
+  ArchitectureSet getArchitectures() const {
+    return mapToArchitectureSet(Targets);
+  }
+
+  PlatformSet getPlatforms() const { return mapToPlatformSet(Targets); }
+
   bool operator==(const InterfaceFileRef &O) const {
-    return std::tie(InstallName, Architectures) ==
-           std::tie(O.InstallName, O.Architectures);
+    return std::tie(InstallName, Targets) == std::tie(O.InstallName, O.Targets);
+  }
+
+  bool operator!=(const InterfaceFileRef &O) const {
+    return std::tie(InstallName, Targets) != std::tie(O.InstallName, O.Targets);
   }
 
   bool operator<(const InterfaceFileRef &O) const {
-    return std::tie(InstallName, Architectures) <
-           std::tie(O.InstallName, O.Architectures);
+    return std::tie(InstallName, Targets) < std::tie(O.InstallName, O.Targets);
   }
 
 private:
   std::string InstallName;
-  ArchitectureSet Architectures;
+  TargetList Targets;
 };
 
 } // end namespace MachO.
@@ -170,27 +175,43 @@
   /// \return The file type.
   FileType getFileType() const { return FileKind; }
 
-  /// Set the platform.
-  void setPlatform(PlatformKind Platform_) { Platform = Platform_; }
+  /// Get the architectures.
+  ///
+  /// \return The applicable architectures.
+  ArchitectureSet getArchitectures() const {
+    return mapToArchitectureSet(Targets);
+  }
 
-  /// Get the platform.
-  PlatformKind getPlatform() const { return Platform; }
+  /// Get the platforms.
+  ///
+  /// \return The applicable platforms.
+  PlatformSet getPlatforms() const { return mapToPlatformSet(Targets); }
 
-  /// Specify the set of supported architectures by this file.
-  void setArchitectures(ArchitectureSet Architectures_) {
-    Architectures = Architectures_;
-  }
+  /// Set and add target.
+  ///
+  /// \param Target the target to add into.
+  void addTarget(const Target &Target);
 
-  /// Add the set of supported architectures by this file.
-  void addArchitectures(ArchitectureSet Architectures_) {
-    Architectures |= Architectures_;
+  /// Set and add targets.
+  ///
+  /// Add the subset of llvm::triples that is supported by Tapi
+  ///
+  /// \param Targets the collection of targets.
+  template <typename RangeT> void addTargets(RangeT &&Targets) {
+    for (const auto &Target_ : Targets)
+      addTarget(Target(Target_));
   }
 
-  /// Add supported architecture by this file..
-  void addArch(Architecture Arch) { Architectures.set(Arch); }
+  using const_target_iterator = TargetList::const_iterator;
+  using const_target_range = llvm::iterator_range<const_target_iterator>;
+  const_target_range targets() const { return {Targets}; }
 
-  /// Get the set of supported architectures.
-  ArchitectureSet getArchitectures() const { return Architectures; }
+  using const_filtered_target_iterator =
+      llvm::filter_iterator<const_target_iterator,
+                            std::function<bool(const Target &)>>;
+  using const_filtered_target_range =
+      llvm::iterator_range<const_filtered_target_iterator>;
+  const_filtered_target_range targets(ArchitectureSet Archs) const;
 
   /// Set the install name of the library.
   void setInstallName(StringRef InstallName_) { InstallName = InstallName_; }
@@ -244,11 +265,18 @@
   /// Check if this file was generated during InstallAPI.
   bool isInstallAPI() const { return IsInstallAPI; }
 
-  /// Set the parent umbrella framework.
-  void setParentUmbrella(StringRef Parent) { ParentUmbrella = Parent; }
+  /// Set the parent umbrella frameworks.
+  /// \param Target_ The target applicable to Parent
+  /// \param Parent  The name of Parent
+  void addParentUmbrella(const Target &Target_, StringRef Parent);
+  const std::vector<std::pair<Target, std::string>> &umbrellas() const {
+    return ParentUmbrellas;
+  }
 
   /// Get the parent umbrella framework.
-  StringRef getParentUmbrella() const { return ParentUmbrella; }
+  const std::vector<std::pair<Target, std::string>> getParentUmbrellas() const {
+    return ParentUmbrellas;
+  }
 
   /// Add an allowable client.
   ///
@@ -258,8 +286,8 @@
   /// linker refuses to link this library.
   ///
   /// \param Name The name of the client that is allowed to link this library.
-  /// \param Architectures The set of architecture for which this applies.
-  void addAllowableClient(StringRef Name, ArchitectureSet Architectures);
+  /// \param Target The target triple for which this applies.
+  void addAllowableClient(StringRef InstallName, const Target &Target);
 
   /// Get the list of allowable clients.
   ///
@@ -271,9 +299,8 @@
   /// Add a re-exported library.
   ///
   /// \param InstallName The name of the library to re-export.
-  /// \param Architectures The set of architecture for which this applies.
-  void addReexportedLibrary(StringRef InstallName,
-                            ArchitectureSet Architectures);
+  /// \param Target The target triple for which this applies.
+  void addReexportedLibrary(StringRef InstallName, const Target &Target);
 
   /// Get the list of re-exported libraries.
   ///
@@ -282,27 +309,27 @@
     return ReexportedLibraries;
   }
 
-  /// Add an architecture/UUID pair.
+  /// Add an Target/UUID pair.
   ///
-  /// \param Arch The architecture for which this applies.
+  /// \param Target The target triple for which this applies.
   /// \param UUID The UUID of the library for the specified architecture.
-  void addUUID(Architecture Arch, StringRef UUID);
+  void addUUID(const Target &Target, StringRef UUID);
 
-  /// Add an architecture/UUID pair.
+  /// Add an Target/UUID pair.
   ///
-  /// \param Arch The architecture for which this applies.
+  /// \param Target The target triple for which this applies.
   /// \param UUID The UUID of the library for the specified architecture.
-  void addUUID(Architecture Arch, uint8_t UUID[16]);
+  void addUUID(const Target &Target, uint8_t UUID[16]);
 
-  /// Get the list of architecture/UUID pairs.
+  /// Get the list of Target/UUID pairs.
   ///
-  /// \return Returns a list of architecture/UUID pairs.
-  const std::vector<std::pair<Architecture, std::string>> &uuids() const {
+  /// \return Returns a list of Target/UUID pairs.
+  const std::vector<std::pair<Target, std::string>> &uuids() const {
     return UUIDs;
   }
 
   /// Add a symbol to the symbols list or extend an existing one.
-  void addSymbol(SymbolKind Kind, StringRef Name, ArchitectureSet Architectures,
+  void addSymbol(SymbolKind Kind, StringRef Name, TargetList Targets,
                  SymbolFlags Flags = SymbolFlags::None);
 
   using SymbolMapType = DenseMap<SymbolsMapKey, Symbol *>;
@@ -362,10 +389,9 @@
     return StringRef(reinterpret_cast<const char *>(Ptr), String.size());
   }
 
+  TargetList Targets;
   std::string Path;
   FileType FileKind;
-  PlatformKind Platform;
-  ArchitectureSet Architectures;
   std::string InstallName;
   PackedVersion CurrentVersion;
   PackedVersion CompatibilityVersion;
@@ -374,10 +400,10 @@
   bool IsAppExtensionSafe{false};
   bool IsInstallAPI{false};
   ObjCConstraintType ObjcConstraint = ObjCConstraintType::None;
-  std::string ParentUmbrella;
+  std::vector<std::pair<Target, std::string>> ParentUmbrellas;
   std::vector<InterfaceFileRef> AllowableClients;
   std::vector<InterfaceFileRef> ReexportedLibraries;
-  std::vector<std::pair<Architecture, std::string>> UUIDs;
+  std::vector<std::pair<Target, std::string>> UUIDs;
   SymbolMapType Symbols;
 };
 
diff --git a/llvm/include/llvm/TextAPI/MachO/Platform.h b/llvm/include/llvm/TextAPI/MachO/Platform.h
new file mode 100644
--- /dev/null
+++ b/llvm/include/llvm/TextAPI/MachO/Platform.h
@@ -0,0 +1,40 @@
+//===- llvm/TextAPI/MachO/Platform.h - Platform -----------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Defines the Platforms supported by Tapi and helpers.
+//
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_TEXTAPI_MACHO_PLATFORM_H
+#define LLVM_TEXTAPI_MACHO_PLATFORM_H
+
+#include "llvm/ADT/SmallSet.h"
+#include "llvm/BinaryFormat/MachO.h"
+
+namespace llvm {
+namespace MachO {
+
+/// Defines the list of MachO platforms.
+enum class PlatformKind : unsigned {
+  unknown,
+  macOS = MachO::PLATFORM_MACOS,
+  iOS = MachO::PLATFORM_IOS,
+  tvOS = MachO::PLATFORM_TVOS,
+  watchOS = MachO::PLATFORM_WATCHOS,
+  bridgeOS = MachO::PLATFORM_BRIDGEOS
+};
+
+using PlatformSet = SmallSet<PlatformKind, 3>;
+
+PlatformKind mapToPlatformKind(const Triple &Target);
+PlatformSet mapToPlatformSet(ArrayRef<Triple> Targets);
+StringRef getPlatformName(PlatformKind Platform);
+
+} // end namespace MachO.
+} // end namespace llvm.
+
+#endif // LLVM_TEXTAPI_MACHO_PLATFORM_H
\ No newline at end of file
diff --git a/llvm/include/llvm/TextAPI/MachO/Symbol.h b/llvm/include/llvm/TextAPI/MachO/Symbol.h
--- a/llvm/include/llvm/TextAPI/MachO/Symbol.h
+++ b/llvm/include/llvm/TextAPI/MachO/Symbol.h
@@ -14,6 +14,7 @@
 #include "llvm/Support/Error.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/TextAPI/MachO/ArchitectureSet.h"
+#include "llvm/TextAPI/MachO/Target.h"
 
 namespace llvm {
 namespace MachO {
@@ -49,16 +50,18 @@
   ObjectiveCInstanceVariable,
 };
 
+using TargetList = std::vector<Target>;
 class Symbol {
 public:
-  constexpr Symbol(SymbolKind Kind, StringRef Name,
-                   ArchitectureSet Architectures, SymbolFlags Flags)
-      : Name(Name), Architectures(Architectures), Kind(Kind), Flags(Flags) {}
+  Symbol(SymbolKind Kind, StringRef Name, TargetList Targets, SymbolFlags Flags)
+      : Name(Name), Targets(std::move(Targets)), Kind(Kind), Flags(Flags) {}
 
+  void addTarget(Target target) { Targets.emplace_back(target); }
   SymbolKind getKind() const { return Kind; }
   StringRef getName() const { return Name; }
-  ArchitectureSet getArchitectures() const { return Architectures; }
-  void addArchitectures(ArchitectureSet Archs) { Architectures |= Archs; }
+  ArchitectureSet getArchitectures() const {
+    return mapToArchitectureSet(Targets);
+  }
   SymbolFlags getFlags() const { return Flags; }
 
   bool isWeakDefined() const {
@@ -78,6 +81,17 @@
     return (Flags & SymbolFlags::Undefined) == SymbolFlags::Undefined;
   }
 
+  using const_target_iterator = TargetList::const_iterator;
+  using const_target_range = llvm::iterator_range<const_target_iterator>;
+  const_target_range targets() const { return {Targets}; }
+
+  using const_filtered_target_iterator =
+      llvm::filter_iterator<const_target_iterator,
+                            std::function<bool(const Target &)>>;
+  using const_filtered_target_range =
+      llvm::iterator_range<const_filtered_target_iterator>;
+  const_filtered_target_range targets(ArchitectureSet architectures) const;
+
 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
   void dump(raw_ostream &OS) const;
   void dump() const { dump(llvm::errs()); }
@@ -85,7 +99,7 @@
 
 private:
   StringRef Name;
-  ArchitectureSet Architectures;
+  TargetList Targets;
   SymbolKind Kind;
   SymbolFlags Flags;
 };
diff --git a/llvm/include/llvm/TextAPI/MachO/Target.h b/llvm/include/llvm/TextAPI/MachO/Target.h
new file mode 100644
--- /dev/null
+++ b/llvm/include/llvm/TextAPI/MachO/Target.h
@@ -0,0 +1,66 @@
+//===- llvm/TextAPI/Target.h - TAPI Target ----------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TEXTAPI_MACHO_TARGET_H
+#define LLVM_TEXTAPI_MACHO_TARGET_H
+
+#include "llvm/ADT/Triple.h"
+#include "llvm/Support/Error.h"
+#include "llvm/TextAPI/MachO/Architecture.h"
+#include "llvm/TextAPI/MachO/ArchitectureSet.h"
+#include "llvm/TextAPI/MachO/Platform.h"
+
+namespace llvm {
+namespace MachO {
+
+// This is similar to a llvm Triple, but the triple doesn't have all the
+// information we need. For example there is no enum value for x86_64h. The
+// only way to get that information is to parse the triple string.
+class Target {
+public:
+  Target() = default;
+  Target(Architecture Arch, PlatformKind Platform)
+      : Arch(Arch), Platform(Platform) {}
+  explicit Target(const llvm::Triple &Triple)
+      : Arch(mapToArchitecture(Triple)), Platform(mapToPlatformKind(Triple)) {}
+
+  operator std::string() const;
+
+  Architecture Arch;
+  PlatformKind Platform;
+};
+
+inline bool operator==(const Target &LHS, const Target &RHS) {
+  return std::tie(LHS.Arch, LHS.Platform) == std::tie(RHS.Arch, RHS.Platform);
+}
+
+inline bool operator!=(const Target &LHS, const Target &RHS) {
+  return std::tie(LHS.Arch, LHS.Platform) != std::tie(RHS.Arch, RHS.Platform);
+}
+
+inline bool operator<(const Target &LHS, const Target &RHS) {
+  return std::tie(LHS.Arch, LHS.Platform) < std::tie(RHS.Arch, RHS.Platform);
+}
+
+inline bool operator==(const Target &LHS, const Architecture &RHS) {
+  return LHS.Arch == RHS;
+}
+
+inline bool operator!=(const Target &LHS, const Architecture &RHS) {
+  return LHS.Arch != RHS;
+}
+
+PlatformSet mapToPlatformSet(ArrayRef<Target> Targets);
+ArchitectureSet mapToArchitectureSet(ArrayRef<Target> Targets);
+
+raw_ostream &operator<<(raw_ostream &OS, const Target &Target);
+
+} // namespace MachO
+} // namespace llvm
+
+#endif // LLVM_TEXTAPI_MACHO_TARGET_H
diff --git a/llvm/lib/Object/TapiFile.cpp b/llvm/lib/Object/TapiFile.cpp
--- a/llvm/lib/Object/TapiFile.cpp
+++ b/llvm/lib/Object/TapiFile.cpp
@@ -45,13 +45,13 @@
     if (!Symbol->getArchitectures().has(Arch))
       continue;
 
-    auto Platform = interface.getPlatform();
     switch (Symbol->getKind()) {
     case SymbolKind::GlobalSymbol:
       Symbols.emplace_back(StringRef(), Symbol->getName(), getFlags(Symbol));
       break;
     case SymbolKind::ObjectiveCClass:
-      if (Platform == PlatformKind::macOS && Arch == AK_i386) {
+      if (interface.getPlatforms().count(PlatformKind::macOS) &&
+          Arch == AK_i386) {
         Symbols.emplace_back(ObjC1ClassNamePrefix, Symbol->getName(),
                              getFlags(Symbol));
       } else {
diff --git a/llvm/lib/TextAPI/CMakeLists.txt b/llvm/lib/TextAPI/CMakeLists.txt
--- a/llvm/lib/TextAPI/CMakeLists.txt
+++ b/llvm/lib/TextAPI/CMakeLists.txt
@@ -5,7 +5,9 @@
   MachO/ArchitectureSet.cpp
   MachO/InterfaceFile.cpp
   MachO/PackedVersion.cpp
+  MachO/Platform.cpp
   MachO/Symbol.cpp
+  MachO/Target.cpp
   MachO/TextStub.cpp
   MachO/TextStubCommon.cpp
 
diff --git a/llvm/lib/TextAPI/MachO/Architecture.cpp b/llvm/lib/TextAPI/MachO/Architecture.cpp
--- a/llvm/lib/TextAPI/MachO/Architecture.cpp
+++ b/llvm/lib/TextAPI/MachO/Architecture.cpp
@@ -68,6 +68,10 @@
   return std::make_pair(0, 0);
 }
 
+Architecture mapToArchitecture(const Triple &Target) {
+  return getArchitectureFromName(Target.getArchName());
+}
+
 raw_ostream &operator<<(raw_ostream &OS, Architecture Arch) {
   OS << getArchitectureName(Arch);
   return OS;
diff --git a/llvm/lib/TextAPI/MachO/InterfaceFile.cpp b/llvm/lib/TextAPI/MachO/InterfaceFile.cpp
--- a/llvm/lib/TextAPI/MachO/InterfaceFile.cpp
+++ b/llvm/lib/TextAPI/MachO/InterfaceFile.cpp
@@ -27,36 +27,65 @@
 
   return Container.emplace(I, InstallName);
 }
+
+template <typename C>
+typename C::iterator addEntry(C &Container, const Target &Target_) {
+  auto Iter =
+      lower_bound(Container, Target_, [](const Target &LHS, const Target &RHS) {
+        return LHS < RHS;
+      });
+  if ((Iter != std::end(Container)) && !(Target_ < *Iter))
+    return Iter;
+
+  return Container.emplace(Iter, Target_);
+}
 } // end namespace detail.
 
-void InterfaceFile::addAllowableClient(StringRef Name,
-                                       ArchitectureSet Architectures) {
-  auto Client = detail::addEntry(AllowableClients, Name);
-  Client->addArchitectures(Architectures);
+void InterfaceFileRef::addTarget(const Target &Target) {
+  detail::addEntry(Targets, Target);
+}
+
+void InterfaceFile::addAllowableClient(StringRef InstallName,
+                                       const Target &Target) {
+  auto Client = detail::addEntry(AllowableClients, InstallName);
+  Client->addTarget(Target);
 }
 
 void InterfaceFile::addReexportedLibrary(StringRef InstallName,
-                                         ArchitectureSet Architectures) {
+                                         const Target &Target) {
   auto Lib = detail::addEntry(ReexportedLibraries, InstallName);
-  Lib->addArchitectures(Architectures);
+  Lib->addTarget(Target);
 }
 
-void InterfaceFile::addUUID(Architecture Arch, StringRef UUID) {
-  auto I = partition_point(UUIDs,
-                           [=](const std::pair<Architecture, std::string> &O) {
-                             return O.first < Arch;
-                           });
+void InterfaceFile::addParentUmbrella(const Target &Target_, StringRef Parent) {
+  auto Iter = lower_bound(ParentUmbrellas, Target_,
+                          [](const std::pair<Target, std::string> &LHS,
+                             Target RHS) { return LHS.first < RHS; });
 
-  if (I != UUIDs.end() && Arch == I->first) {
-    I->second = UUID;
+  if ((Iter != ParentUmbrellas.end()) && !(Target_ < Iter->first)) {
+    Iter->second = Parent;
     return;
   }
 
-  UUIDs.emplace(I, Arch, UUID);
+  ParentUmbrellas.emplace(Iter, Target_, Parent);
   return;
 }
 
-void InterfaceFile::addUUID(Architecture Arch, uint8_t UUID[16]) {
+void InterfaceFile::addUUID(const Target &Target_, StringRef UUID) {
+  auto Iter = lower_bound(UUIDs, Target_,
+                          [](const std::pair<Target, std::string> &LHS,
+                             Target RHS) { return LHS.first < RHS; });
+
+  if ((Iter != UUIDs.end()) && !(Target_ < Iter->first)) {
+    Iter->second = UUID;
+    return;
+  }
+
+  UUIDs.emplace(Iter, Target_, UUID);
+  return;
+}
+
+void InterfaceFile::addUUID(const Target &Target, uint8_t UUID[16]) {
   std::stringstream Stream;
   for (unsigned i = 0; i < 16; ++i) {
     if (i == 4 || i == 6 || i == 8 || i == 10)
@@ -64,17 +93,30 @@
     Stream << std::setfill('0') << std::setw(2) << std::uppercase << std::hex
            << static_cast<int>(UUID[i]);
   }
-  addUUID(Arch, Stream.str());
+  addUUID(Target, Stream.str());
+}
+
+void InterfaceFile::addTarget(const Target &Target) {
+  detail::addEntry(Targets, Target);
+}
+
+InterfaceFile::const_filtered_target_range
+InterfaceFile::targets(ArchitectureSet Archs) const {
+  std::function<bool(const Target &)> fn = [Archs](const Target &Target_) {
+    return Archs.has(Target_.Arch);
+  };
+  return make_filter_range(Targets, fn);
 }
 
 void InterfaceFile::addSymbol(SymbolKind Kind, StringRef Name,
-                              ArchitectureSet Archs, SymbolFlags Flags) {
+                              TargetList Targets, SymbolFlags Flags) {
   Name = copyString(Name);
   auto result = Symbols.try_emplace(SymbolsMapKey{Kind, Name}, nullptr);
   if (result.second)
-    result.first->second = new (Allocator) Symbol{Kind, Name, Archs, Flags};
+    result.first->second = new (Allocator) Symbol{Kind, Name, Targets, Flags};
   else
-    result.first->second->addArchitectures(Archs);
+    for (const auto &Target : Targets)
+      result.first->second->addTarget(Target);
 }
 
 } // end namespace MachO.
diff --git a/llvm/lib/TextAPI/MachO/Platform.cpp b/llvm/lib/TextAPI/MachO/Platform.cpp
new file mode 100644
--- /dev/null
+++ b/llvm/lib/TextAPI/MachO/Platform.cpp
@@ -0,0 +1,61 @@
+//===- llvm/TextAPI/MachO/Platform.cpp - Platform ---------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Implementations of Platform Helper functions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/TextAPI/MachO/Platform.h"
+
+namespace llvm {
+namespace MachO {
+
+PlatformKind mapToPlatformKind(const Triple &Target) {
+  switch (Target.getOS()) {
+  default:
+    return PlatformKind::unknown;
+  case Triple::MacOSX:
+    return PlatformKind::macOS;
+  case Triple::IOS:
+    return PlatformKind::iOS;
+  case Triple::TvOS:
+    return PlatformKind::tvOS;
+  case Triple::WatchOS:
+    return PlatformKind::watchOS;
+    // TODO: add bridgeOS once in llvm::Triple
+  }
+}
+
+PlatformSet mapToPlatformSet(ArrayRef<Triple> Targets) {
+  PlatformSet Result;
+  for (const auto &Target : Targets)
+    Result.insert(mapToPlatformKind(Target));
+  return Result;
+}
+
+StringRef getPlatformName(PlatformKind Platform) {
+  switch (Platform) {
+  case PlatformKind::unknown:
+    return "unknown";
+  case PlatformKind::macOS:
+    return "macOS";
+  case PlatformKind::iOS:
+    return "iOS";
+  case PlatformKind::tvOS:
+    return "tvOS";
+  case PlatformKind::watchOS:
+    return "watchOS";
+  case PlatformKind::bridgeOS:
+    return "bridgeOS";
+  }
+}
+
+} // end namespace MachO.
+} // end namespace llvm.
\ No newline at end of file
diff --git a/llvm/lib/TextAPI/MachO/Symbol.cpp b/llvm/lib/TextAPI/MachO/Symbol.cpp
--- a/llvm/lib/TextAPI/MachO/Symbol.cpp
+++ b/llvm/lib/TextAPI/MachO/Symbol.cpp
@@ -45,5 +45,14 @@
 }
 #endif
 
+Symbol::const_filtered_target_range
+Symbol::targets(ArchitectureSet Architectures) const {
+  std::function<bool(const Target &)> FN =
+      [Architectures](const Target &Target) {
+        return Architectures.has(Target.Arch);
+      };
+  return make_filter_range(Targets, FN);
+}
+
 } // end namespace MachO.
 } // end namespace llvm.
diff --git a/llvm/lib/TextAPI/MachO/Target.cpp b/llvm/lib/TextAPI/MachO/Target.cpp
new file mode 100644
--- /dev/null
+++ b/llvm/lib/TextAPI/MachO/Target.cpp
@@ -0,0 +1,45 @@
+//===- tapi/Core/Target.cpp - Target ----------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/TextAPI/MachO/Target.h"
+
+namespace llvm {
+namespace MachO {
+
+Target::operator std::string() const {
+  return (getArchitectureName(Arch) + " (" + getPlatformName(Platform) + ")")
+      .str();
+}
+
+raw_ostream &operator<<(raw_ostream &OS, const Target &Target) {
+  OS << std::string(Target);
+  return OS;
+}
+
+PlatformSet mapToPlatformSet(ArrayRef<Target> Targets) {
+  PlatformSet Result;
+  for (const auto &Target : Targets)
+    Result.insert(Target.Platform);
+  return Result;
+}
+
+ArchitectureSet mapToArchitectureSet(ArrayRef<Target> Targets) {
+  ArchitectureSet Result;
+  for (const auto &Target : Targets)
+    Result.set(Target.Arch);
+  return Result;
+}
+
+} // end namespace MachO.
+} // end namespace llvm.
\ No newline at end of file
diff --git a/llvm/lib/TextAPI/MachO/TextStub.cpp b/llvm/lib/TextAPI/MachO/TextStub.cpp
--- a/llvm/lib/TextAPI/MachO/TextStub.cpp
+++ b/llvm/lib/TextAPI/MachO/TextStub.cpp
@@ -246,7 +246,7 @@
     NormalizedTBD(IO &IO, const InterfaceFile *&File) {
       Architectures = File->getArchitectures();
       UUIDs = File->uuids();
-      Platform = File->getPlatform();
+      Platforms = File->getPlatforms();
       InstallName = File->getInstallName();
       CurrentVersion = PackedVersion(File->getCurrentVersion());
       CompatibilityVersion = PackedVersion(File->getCompatibilityVersion());
@@ -263,7 +263,10 @@
       if (File->isInstallAPI())
         Flags |= TBDFlags::InstallAPI;
 
-      ParentUmbrella = File->getParentUmbrella();
+      for (const auto &Iter : File->umbrellas()) {
+        ParentUmbrella = Iter.second;
+        break;
+      }
 
       std::set<ArchitectureSet> ArchSet;
       for (const auto &Library : File->allowableClients())
@@ -396,6 +399,17 @@
       }
     }
 
+    TargetList synthesizeTargets(ArchitectureSet Architectures,
+                                 const PlatformSet &Platforms) {
+      TargetList Targets;
+
+      for (auto Platform : Platforms) {
+        for (const auto &&Architecture : Architectures)
+          Targets.emplace_back(Architecture, Platform);
+      }
+      return Targets;
+    }
+
     const InterfaceFile *denormalize(IO &IO) {
       auto Ctx = reinterpret_cast<TextAPIContext *>(IO.getContext());
       assert(Ctx);
@@ -403,16 +417,16 @@
       auto *File = new InterfaceFile;
       File->setPath(Ctx->Path);
       File->setFileType(Ctx->FileKind);
+      File->addTargets(synthesizeTargets(Architectures, Platforms));
       for (auto &ID : UUIDs)
         File->addUUID(ID.first, ID.second);
-      File->setPlatform(Platform);
-      File->setArchitectures(Architectures);
       File->setInstallName(InstallName);
       File->setCurrentVersion(CurrentVersion);
       File->setCompatibilityVersion(CompatibilityVersion);
       File->setSwiftABIVersion(SwiftABIVersion);
       File->setObjCConstraint(ObjCConstraint);
-      File->setParentUmbrella(ParentUmbrella);
+      for (const auto &Target : File->targets())
+        File->addParentUmbrella(Target, ParentUmbrella);
 
       if (Ctx->FileKind == FileType::TBD_V1) {
         File->setTwoLevelNamespace();
@@ -425,76 +439,80 @@
       }
 
       for (const auto &Section : Exports) {
-        for (const auto &Library : Section.AllowableClients)
-          File->addAllowableClient(Library, Section.Architectures);
-        for (const auto &Library : Section.ReexportedLibraries)
-          File->addReexportedLibrary(Library, Section.Architectures);
+        const auto Targets =
+            synthesizeTargets(Section.Architectures, Platforms);
+
+        for (const auto &Lib : Section.AllowableClients)
+          for (const auto &Target : Targets)
+            File->addAllowableClient(Lib, Target);
+
+        for (const auto &Lib : Section.ReexportedLibraries)
+          for (const auto &Target : Targets)
+            File->addReexportedLibrary(Lib, Target);
 
         for (const auto &Symbol : Section.Symbols) {
           if (Ctx->FileKind != FileType::TBD_V3 &&
               Symbol.value.startswith("_OBJC_EHTYPE_$_"))
             File->addSymbol(SymbolKind::ObjectiveCClassEHType,
-                            Symbol.value.drop_front(15), Section.Architectures);
+                            Symbol.value.drop_front(15), Targets);
           else
-            File->addSymbol(SymbolKind::GlobalSymbol, Symbol,
-                            Section.Architectures);
+            File->addSymbol(SymbolKind::GlobalSymbol, Symbol, Targets);
         }
         for (auto &Symbol : Section.Classes) {
           auto Name = Symbol.value;
           if (Ctx->FileKind != FileType::TBD_V3)
             Name = Name.drop_front();
-          File->addSymbol(SymbolKind::ObjectiveCClass, Name,
-                          Section.Architectures);
+          File->addSymbol(SymbolKind::ObjectiveCClass, Name, Targets);
         }
         for (auto &Symbol : Section.ClassEHs)
-          File->addSymbol(SymbolKind::ObjectiveCClassEHType, Symbol,
-                          Section.Architectures);
+          File->addSymbol(SymbolKind::ObjectiveCClassEHType, Symbol, Targets);
         for (auto &Symbol : Section.IVars) {
           auto Name = Symbol.value;
           if (Ctx->FileKind != FileType::TBD_V3)
             Name = Name.drop_front();
           File->addSymbol(SymbolKind::ObjectiveCInstanceVariable, Name,
-                          Section.Architectures);
+                          Targets);
         }
         for (auto &Symbol : Section.WeakDefSymbols)
-          File->addSymbol(SymbolKind::GlobalSymbol, Symbol,
-                          Section.Architectures, SymbolFlags::WeakDefined);
+          File->addSymbol(SymbolKind::GlobalSymbol, Symbol, Targets,
+                          SymbolFlags::WeakDefined);
         for (auto &Symbol : Section.TLVSymbols)
-          File->addSymbol(SymbolKind::GlobalSymbol, Symbol,
-                          Section.Architectures, SymbolFlags::ThreadLocalValue);
+          File->addSymbol(SymbolKind::GlobalSymbol, Symbol, Targets,
+                          SymbolFlags::ThreadLocalValue);
       }
 
       for (const auto &Section : Undefineds) {
+        const auto Targets =
+            synthesizeTargets(Section.Architectures, Platforms);
         for (auto &Symbol : Section.Symbols) {
           if (Ctx->FileKind != FileType::TBD_V3 &&
               Symbol.value.startswith("_OBJC_EHTYPE_$_"))
             File->addSymbol(SymbolKind::ObjectiveCClassEHType,
-                            Symbol.value.drop_front(15), Section.Architectures,
+                            Symbol.value.drop_front(15), Targets,
                             SymbolFlags::Undefined);
           else
-            File->addSymbol(SymbolKind::GlobalSymbol, Symbol,
-                            Section.Architectures, SymbolFlags::Undefined);
+            File->addSymbol(SymbolKind::GlobalSymbol, Symbol, Targets,
+                            SymbolFlags::Undefined);
         }
         for (auto &Symbol : Section.Classes) {
           auto Name = Symbol.value;
           if (Ctx->FileKind != FileType::TBD_V3)
             Name = Name.drop_front();
-          File->addSymbol(SymbolKind::ObjectiveCClass, Name,
-                          Section.Architectures, SymbolFlags::Undefined);
+          File->addSymbol(SymbolKind::ObjectiveCClass, Name, Targets,
+                          SymbolFlags::Undefined);
         }
         for (auto &Symbol : Section.ClassEHs)
-          File->addSymbol(SymbolKind::ObjectiveCClassEHType, Symbol,
-                          Section.Architectures, SymbolFlags::Undefined);
+          File->addSymbol(SymbolKind::ObjectiveCClassEHType, Symbol, Targets,
+                          SymbolFlags::Undefined);
         for (auto &Symbol : Section.IVars) {
           auto Name = Symbol.value;
           if (Ctx->FileKind != FileType::TBD_V3)
             Name = Name.drop_front();
-          File->addSymbol(SymbolKind::ObjectiveCInstanceVariable, Name,
-                          Section.Architectures, SymbolFlags::Undefined);
+          File->addSymbol(SymbolKind::ObjectiveCInstanceVariable, Name, Targets,
+                          SymbolFlags::Undefined);
         }
         for (auto &Symbol : Section.WeakRefSymbols)
-          File->addSymbol(SymbolKind::GlobalSymbol, Symbol,
-                          Section.Architectures,
+          File->addSymbol(SymbolKind::GlobalSymbol, Symbol, Targets,
                           SymbolFlags::Undefined | SymbolFlags::WeakReferenced);
       }
 
@@ -513,7 +531,7 @@
 
     std::vector<Architecture> Architectures;
     std::vector<UUID> UUIDs;
-    PlatformKind Platform{PlatformKind::unknown};
+    PlatformSet Platforms;
     StringRef InstallName;
     PackedVersion CurrentVersion;
     PackedVersion CompatibilityVersion;
@@ -567,7 +585,7 @@
     IO.mapRequired("archs", Keys->Architectures);
     if (Ctx->FileKind != FileType::TBD_V1)
       IO.mapOptional("uuids", Keys->UUIDs);
-    IO.mapRequired("platform", Keys->Platform);
+    IO.mapRequired("platform", Keys->Platforms);
     if (Ctx->FileKind != FileType::TBD_V1)
       IO.mapOptional("flags", Keys->Flags, TBDFlags::None);
     IO.mapRequired("install-name", Keys->InstallName);
diff --git a/llvm/lib/TextAPI/MachO/TextStubCommon.h b/llvm/lib/TextAPI/MachO/TextStubCommon.h
--- a/llvm/lib/TextAPI/MachO/TextStubCommon.h
+++ b/llvm/lib/TextAPI/MachO/TextStubCommon.h
@@ -21,7 +21,7 @@
 #include "llvm/TextAPI/MachO/InterfaceFile.h"
 #include "llvm/TextAPI/MachO/PackedVersion.h"
 
-using UUID = std::pair<llvm::MachO::Architecture, std::string>;
+using UUID = std::pair<llvm::MachO::Target, std::string>;
 
 LLVM_YAML_STRONG_TYPEDEF(llvm::StringRef, FlowStringRef)
 LLVM_YAML_STRONG_TYPEDEF(uint8_t, SwiftVersion)
@@ -41,9 +41,9 @@
   static void enumeration(IO &, MachO::ObjCConstraintType &);
 };
 
-template <> struct ScalarTraits<MachO::PlatformKind> {
-  static void output(const MachO::PlatformKind &, void *, raw_ostream &);
-  static StringRef input(StringRef, void *, MachO::PlatformKind &);
+template <> struct ScalarTraits<MachO::PlatformSet> {
+  static void output(const MachO::PlatformSet &, void *, raw_ostream &);
+  static StringRef input(StringRef, void *, MachO::PlatformSet &);
   static QuotingType mustQuote(StringRef);
 };
 
diff --git a/llvm/lib/TextAPI/MachO/TextStubCommon.cpp b/llvm/lib/TextAPI/MachO/TextStubCommon.cpp
--- a/llvm/lib/TextAPI/MachO/TextStubCommon.cpp
+++ b/llvm/lib/TextAPI/MachO/TextStubCommon.cpp
@@ -41,9 +41,10 @@
   IO.enumCase(Constraint, "gc", ObjCConstraintType::GC);
 }
 
-void ScalarTraits<PlatformKind>::output(const PlatformKind &Value, void *,
-                                        raw_ostream &OS) {
-  switch (Value) {
+void ScalarTraits<PlatformSet>::output(const PlatformSet &Values, void *IO,
+                                       raw_ostream &OS) {
+  assert(Values.size() == 1U);
+  switch (*Values.begin()) {
   default:
     llvm_unreachable("unexpected platform");
     break;
@@ -64,21 +65,26 @@
     break;
   }
 }
-StringRef ScalarTraits<PlatformKind>::input(StringRef Scalar, void *,
-                                            PlatformKind &Value) {
-  Value = StringSwitch<PlatformKind>(Scalar)
-              .Case("macosx", PlatformKind::macOS)
-              .Case("ios", PlatformKind::iOS)
-              .Case("watchos", PlatformKind::watchOS)
-              .Case("tvos", PlatformKind::tvOS)
-              .Case("bridgeos", PlatformKind::bridgeOS)
-              .Default(PlatformKind::unknown);
-
-  if (Value == PlatformKind::unknown)
+
+StringRef ScalarTraits<PlatformSet>::input(StringRef Scalar, void *IO,
+                                           PlatformSet &Values) {
+  auto Platform = StringSwitch<PlatformKind>(Scalar)
+                      .Case("unknown", PlatformKind::unknown)
+                      .Case("macosx", PlatformKind::macOS)
+                      .Case("ios", PlatformKind::iOS)
+                      .Case("watchos", PlatformKind::watchOS)
+                      .Case("tvos", PlatformKind::tvOS)
+                      .Case("bridgeos", PlatformKind::bridgeOS)
+                      .Default(PlatformKind::unknown);
+
+  if (Platform == PlatformKind::unknown)
     return "unknown platform";
+
+  Values.insert(Platform);
   return {};
 }
-QuotingType ScalarTraits<PlatformKind>::mustQuote(StringRef) {
+
+QuotingType ScalarTraits<PlatformSet>::mustQuote(StringRef) {
   return QuotingType::None;
 }
 
@@ -166,10 +172,11 @@
   auto UUID = Split.second.trim();
   if (UUID.empty())
     return "invalid uuid string pair";
-  Value.first = getArchitectureFromName(Arch);
   Value.second = UUID;
+  Value.first = Target{getArchitectureFromName(Arch), PlatformKind::unknown};
   return {};
 }
+
 QuotingType ScalarTraits<UUID>::mustQuote(StringRef) {
   return QuotingType::Single;
 }
diff --git a/llvm/tools/llvm-ifs/llvm-ifs.cpp b/llvm/tools/llvm-ifs/llvm-ifs.cpp
--- a/llvm/tools/llvm-ifs/llvm-ifs.cpp
+++ b/llvm/tools/llvm-ifs/llvm-ifs.cpp
@@ -220,21 +220,6 @@
 
 int writeTbdStub(const llvm::Triple &T, const std::set<IFSSymbol> &Symbols,
                  const StringRef Format, raw_ostream &Out) {
-  auto ArchOrError =
-      [](const llvm::Triple &T) -> llvm::Expected<llvm::MachO::Architecture> {
-    switch (T.getArch()) {
-    default:
-      return createStringError(errc::not_supported, "Invalid Architecture.\n");
-    case llvm::Triple::ArchType::x86:
-      return AK_i386;
-    case llvm::Triple::ArchType::x86_64:
-      return AK_x86_64;
-    case llvm::Triple::ArchType::arm:
-      return AK_armv7;
-    case llvm::Triple::ArchType::aarch64:
-      return AK_arm64;
-    }
-  }(T);
 
   auto PlatformKindOrError =
       [](const llvm::Triple &T) -> llvm::Expected<llvm::MachO::PlatformKind> {
@@ -256,19 +241,15 @@
     return createStringError(errc::not_supported, "Invalid Platform.\n");
   }(T);
 
-  if (!ArchOrError)
-    return -1;
-
   if (!PlatformKindOrError)
     return -1;
 
-  Architecture Arch = ArchOrError.get();
   PlatformKind Plat = PlatformKindOrError.get();
+  TargetList Targets({Target(llvm::MachO::mapToArchitecture(T), Plat)});
 
   InterfaceFile File;
   File.setFileType(FileType::TBD_V3); // Only supporting v3 for now.
-  File.setArchitectures(Arch);
-  File.setPlatform(Plat);
+  File.addTargets(Targets);
 
   for (const auto &Symbol : Symbols) {
     auto Name = Symbol.Name;
@@ -286,9 +267,9 @@
       break;
     }
     if (Symbol.Weak)
-      File.addSymbol(Kind, Name, Arch, SymbolFlags::WeakDefined);
+      File.addSymbol(Kind, Name, Targets, SymbolFlags::WeakDefined);
     else
-      File.addSymbol(Kind, Name, Arch);
+      File.addSymbol(Kind, Name, Targets);
   }
 
   SmallString<4096> Buffer;
diff --git a/llvm/unittests/TextAPI/TextStubV1Tests.cpp b/llvm/unittests/TextAPI/TextStubV1Tests.cpp
--- a/llvm/unittests/TextAPI/TextStubV1Tests.cpp
+++ b/llvm/unittests/TextAPI/TextStubV1Tests.cpp
@@ -87,8 +87,13 @@
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V1, File->getFileType());
   auto Archs = AK_armv7 | AK_armv7s | AK_armv7k | AK_arm64;
+  auto Platform = PlatformKind::iOS;
+  TargetList Targets;
+  for (auto &&arch : Archs)
+    Targets.emplace_back(Target(arch, Platform));
   EXPECT_EQ(Archs, File->getArchitectures());
-  EXPECT_EQ(PlatformKind::iOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
   EXPECT_EQ(std::string("Test.dylib"), File->getInstallName());
   EXPECT_EQ(PackedVersion(2, 3, 4), File->getCurrentVersion());
   EXPECT_EQ(PackedVersion(1, 0, 0), File->getCompatibilityVersion());
@@ -97,8 +102,8 @@
   EXPECT_TRUE(File->isTwoLevelNamespace());
   EXPECT_TRUE(File->isApplicationExtensionSafe());
   EXPECT_FALSE(File->isInstallAPI());
-  InterfaceFileRef client("clientA", Archs);
-  InterfaceFileRef reexport("/usr/lib/libfoo.dylib", Archs);
+  InterfaceFileRef client("clientA", Targets);
+  InterfaceFileRef reexport("/usr/lib/libfoo.dylib", Targets);
   EXPECT_EQ(1U, File->allowableClients().size());
   EXPECT_EQ(client, File->allowableClients().front());
   EXPECT_EQ(1U, File->reexportedLibraries().size());
@@ -117,6 +122,10 @@
   EXPECT_EQ(sizeof(TBDv1Symbols) / sizeof(ExportedSymbol), Exports.size());
   EXPECT_TRUE(
       std::equal(Exports.begin(), Exports.end(), std::begin(TBDv1Symbols)));
+
+  File->addSymbol(SymbolKind::ObjectiveCClassEHType, "Class1", {Targets.at(1)});
+  File->addSymbol(SymbolKind::ObjectiveCInstanceVariable, "Class1._ivar1",
+                  {Targets.at(1)});
 }
 
 TEST(TBDv1, ReadFile2) {
@@ -131,8 +140,13 @@
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V1, File->getFileType());
   auto Archs = AK_armv7 | AK_armv7s | AK_armv7k | AK_arm64;
+  auto Platform = PlatformKind::iOS;
+  TargetList Targets;
+  for (auto &&arch : Archs)
+    Targets.emplace_back(Target(arch, Platform));
   EXPECT_EQ(Archs, File->getArchitectures());
-  EXPECT_EQ(PlatformKind::iOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
   EXPECT_EQ(std::string("Test.dylib"), File->getInstallName());
   EXPECT_EQ(PackedVersion(1, 0, 0), File->getCurrentVersion());
   EXPECT_EQ(PackedVersion(1, 0, 0), File->getCompatibilityVersion());
@@ -169,25 +183,27 @@
       "...\n";
 
   InterfaceFile File;
+  TargetList Targets;
+  for (auto &&arch : AK_i386 | AK_x86_64)
+    Targets.emplace_back(Target(arch, PlatformKind::macOS));
   File.setPath("libfoo.dylib");
   File.setInstallName("/usr/lib/libfoo.dylib");
   File.setFileType(FileType::TBD_V1);
-  File.setArchitectures(AK_i386 | AK_x86_64);
-  File.setPlatform(PlatformKind::macOS);
+  File.addTargets(Targets);
   File.setCurrentVersion(PackedVersion(1, 2, 3));
   File.setSwiftABIVersion(5);
   File.setObjCConstraint(ObjCConstraintType::Retain_Release);
-  File.addAllowableClient("clientA", AK_x86_64);
-  File.addReexportedLibrary("/usr/lib/libfoo.dylib", AK_x86_64);
-  File.addSymbol(SymbolKind::GlobalSymbol, "_sym1", AK_i386);
-  File.addSymbol(SymbolKind::GlobalSymbol, "_sym2", AK_i386,
+  File.addAllowableClient("clientA", Targets.at(1));
+  File.addReexportedLibrary("/usr/lib/libfoo.dylib", Targets.at(1));
+  File.addSymbol(SymbolKind::GlobalSymbol, "_sym1", {Targets.at(0)});
+  File.addSymbol(SymbolKind::GlobalSymbol, "_sym2", {Targets.at(0)},
                  SymbolFlags::WeakDefined);
-  File.addSymbol(SymbolKind::GlobalSymbol, "_sym3", AK_i386,
+  File.addSymbol(SymbolKind::GlobalSymbol, "_sym3", {Targets.at(0)},
                  SymbolFlags::ThreadLocalValue);
-  File.addSymbol(SymbolKind::ObjectiveCClass, "Class1", AK_x86_64);
-  File.addSymbol(SymbolKind::ObjectiveCClassEHType, "Class1", AK_x86_64);
+  File.addSymbol(SymbolKind::ObjectiveCClass, "Class1", {Targets.at(1)});
+  File.addSymbol(SymbolKind::ObjectiveCClassEHType, "Class1", {Targets.at(1)});
   File.addSymbol(SymbolKind::ObjectiveCInstanceVariable, "Class1._ivar1",
-                 AK_x86_64);
+                 {Targets.at(1)});
 
   SmallString<4096> Buffer;
   raw_svector_ostream OS(Buffer);
@@ -206,9 +222,11 @@
   auto Result =
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_macos, "Test.tbd"));
   EXPECT_TRUE(!!Result);
+  auto Platform = PlatformKind::macOS;
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V1, File->getFileType());
-  EXPECT_EQ(PlatformKind::macOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv1, Platform_iOS) {
@@ -221,9 +239,11 @@
   auto Result =
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_ios, "Test.tbd"));
   EXPECT_TRUE(!!Result);
+  auto Platform = PlatformKind::iOS;
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V1, File->getFileType());
-  EXPECT_EQ(PlatformKind::iOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv1, Platform_watchOS) {
@@ -236,9 +256,11 @@
   auto Result =
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_watchos, "Test.tbd"));
   EXPECT_TRUE(!!Result);
+  auto Platform = PlatformKind::watchOS;
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V1, File->getFileType());
-  EXPECT_EQ(PlatformKind::watchOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv1, Platform_tvOS) {
@@ -251,9 +273,11 @@
   auto Result =
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_tvos, "Test.tbd"));
   EXPECT_TRUE(!!Result);
+  auto Platform = PlatformKind::tvOS;
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V1, File->getFileType());
-  EXPECT_EQ(PlatformKind::tvOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv1, Platform_bridgeOS) {
@@ -266,9 +290,11 @@
   auto Result =
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_bridgeos, "Test.tbd"));
   EXPECT_TRUE(!!Result);
+  auto Platform = PlatformKind::bridgeOS;
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V1, File->getFileType());
-  EXPECT_EQ(PlatformKind::bridgeOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv1, Swift_1_0) {
diff --git a/llvm/unittests/TextAPI/TextStubV2Tests.cpp b/llvm/unittests/TextAPI/TextStubV2Tests.cpp
--- a/llvm/unittests/TextAPI/TextStubV2Tests.cpp
+++ b/llvm/unittests/TextAPI/TextStubV2Tests.cpp
@@ -89,8 +89,13 @@
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V2, File->getFileType());
   auto Archs = AK_armv7 | AK_armv7s | AK_armv7k | AK_arm64;
+  auto Platform = PlatformKind::iOS;
+  TargetList Targets;
+  for (auto &&arch : Archs)
+    Targets.emplace_back(Target(arch, Platform));
   EXPECT_EQ(Archs, File->getArchitectures());
-  EXPECT_EQ(PlatformKind::iOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
   EXPECT_EQ(std::string("Test.dylib"), File->getInstallName());
   EXPECT_EQ(PackedVersion(2, 3, 4), File->getCurrentVersion());
   EXPECT_EQ(PackedVersion(1, 0, 0), File->getCompatibilityVersion());
@@ -99,8 +104,8 @@
   EXPECT_TRUE(File->isTwoLevelNamespace());
   EXPECT_TRUE(File->isApplicationExtensionSafe());
   EXPECT_TRUE(File->isInstallAPI());
-  InterfaceFileRef client("clientA", Archs);
-  InterfaceFileRef reexport("/usr/lib/libfoo.dylib", Archs);
+  InterfaceFileRef client("clientA", Targets);
+  InterfaceFileRef reexport("/usr/lib/libfoo.dylib", Targets);
   EXPECT_EQ(1U, File->allowableClients().size());
   EXPECT_EQ(client, File->allowableClients().front());
   EXPECT_EQ(1U, File->reexportedLibraries().size());
@@ -155,8 +160,13 @@
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V2, File->getFileType());
   auto Archs = AK_armv7 | AK_armv7s | AK_armv7k | AK_arm64;
+  auto Platform = PlatformKind::iOS;
+  TargetList Targets;
+  for (auto &&arch : Archs)
+    Targets.emplace_back(Target(arch, Platform));
   EXPECT_EQ(Archs, File->getArchitectures());
-  EXPECT_EQ(PlatformKind::iOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
   EXPECT_EQ(std::string("Test.dylib"), File->getInstallName());
   EXPECT_EQ(PackedVersion(1, 0, 0), File->getCurrentVersion());
   EXPECT_EQ(PackedVersion(1, 0, 0), File->getCompatibilityVersion());
@@ -192,27 +202,29 @@
       "...\n";
 
   InterfaceFile File;
+  TargetList Targets;
+  for (auto &&arch : AK_i386 | AK_x86_64)
+    Targets.emplace_back(Target(arch, PlatformKind::macOS));
   File.setPath("libfoo.dylib");
   File.setInstallName("/usr/lib/libfoo.dylib");
   File.setFileType(FileType::TBD_V2);
-  File.setArchitectures(AK_i386 | AK_x86_64);
-  File.setPlatform(PlatformKind::macOS);
+  File.addTargets(Targets);
   File.setCurrentVersion(PackedVersion(1, 2, 3));
   File.setTwoLevelNamespace();
   File.setApplicationExtensionSafe();
   File.setSwiftABIVersion(5);
   File.setObjCConstraint(ObjCConstraintType::Retain_Release);
-  File.addAllowableClient("clientA", AK_x86_64);
-  File.addReexportedLibrary("/usr/lib/libfoo.dylib", AK_x86_64);
-  File.addSymbol(SymbolKind::GlobalSymbol, "_sym1", AK_i386);
-  File.addSymbol(SymbolKind::GlobalSymbol, "_sym2", AK_i386,
+  File.addAllowableClient("clientA", Targets.at(1));
+  File.addReexportedLibrary("/usr/lib/libfoo.dylib", Targets.at(1));
+  File.addSymbol(SymbolKind::GlobalSymbol, "_sym1", {Targets.at(0)});
+  File.addSymbol(SymbolKind::GlobalSymbol, "_sym2", {Targets.at(0)},
                  SymbolFlags::WeakDefined);
-  File.addSymbol(SymbolKind::GlobalSymbol, "_sym3", AK_i386,
+  File.addSymbol(SymbolKind::GlobalSymbol, "_sym3", {Targets.at(0)},
                  SymbolFlags::ThreadLocalValue);
-  File.addSymbol(SymbolKind::ObjectiveCClass, "Class1", AK_x86_64);
-  File.addSymbol(SymbolKind::ObjectiveCClassEHType, "Class1", AK_x86_64);
+  File.addSymbol(SymbolKind::ObjectiveCClass, "Class1", {Targets.at(1)});
+  File.addSymbol(SymbolKind::ObjectiveCClassEHType, "Class1", {Targets.at(1)});
   File.addSymbol(SymbolKind::ObjectiveCInstanceVariable, "Class1._ivar1",
-                 AK_x86_64);
+                 {Targets.at(1)});
 
   SmallString<4096> Buffer;
   raw_svector_ostream OS(Buffer);
@@ -232,8 +244,10 @@
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_macos, "Test.tbd"));
   EXPECT_TRUE(!!Result);
   auto File = std::move(Result.get());
+  auto Platform = PlatformKind::macOS;
   EXPECT_EQ(FileType::TBD_V2, File->getFileType());
-  EXPECT_EQ(PlatformKind::macOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv2, Platform_iOS) {
@@ -246,9 +260,11 @@
   auto Result =
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_ios, "Test.tbd"));
   EXPECT_TRUE(!!Result);
+  auto Platform = PlatformKind::iOS;
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V2, File->getFileType());
-  EXPECT_EQ(PlatformKind::iOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv2, Platform_watchOS) {
@@ -261,9 +277,11 @@
   auto Result =
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_watchos, "Test.tbd"));
   EXPECT_TRUE(!!Result);
+  auto Platform = PlatformKind::watchOS;
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V2, File->getFileType());
-  EXPECT_EQ(PlatformKind::watchOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv2, Platform_tvOS) {
@@ -276,9 +294,11 @@
   auto Result =
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_tvos, "Test.tbd"));
   EXPECT_TRUE(!!Result);
+  auto Platform = PlatformKind::tvOS;
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V2, File->getFileType());
-  EXPECT_EQ(PlatformKind::tvOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv2, Platform_bridgeOS) {
@@ -291,9 +311,11 @@
   auto Result =
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_bridgeos, "Test.tbd"));
   EXPECT_TRUE(!!Result);
+  auto Platform = PlatformKind::bridgeOS;
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V2, File->getFileType());
-  EXPECT_EQ(PlatformKind::bridgeOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv2, Swift_1_0) {
@@ -415,7 +437,6 @@
       "platform: macosx\n"
       "install-name: Test.dylib\n"
       "...\n";
-
   auto Result = TextAPIReader::get(
       MemoryBufferRef(tbd_v2_file_unknown_architecture, "Test.tbd"));
   EXPECT_TRUE(!!Result);
@@ -423,9 +444,9 @@
 
 TEST(TBDv2, UnknownPlatform) {
   static const char tbd_v2_file_unknown_platform[] = "--- !tapi-tbd-v2\n"
-                                                     "archs: [ i386 ]\n"
-                                                     "platform: newOS\n"
-                                                     "...\n";
+	                                                     "archs: [ i386 ]\n"
+	                                                     "platform: newOS\n"
+	                                                     "...\n";
 
   auto Result = TextAPIReader::get(
       MemoryBufferRef(tbd_v2_file_unknown_platform, "Test.tbd"));
diff --git a/llvm/unittests/TextAPI/TextStubV3Tests.cpp b/llvm/unittests/TextAPI/TextStubV3Tests.cpp
--- a/llvm/unittests/TextAPI/TextStubV3Tests.cpp
+++ b/llvm/unittests/TextAPI/TextStubV3Tests.cpp
@@ -23,7 +23,7 @@
   bool ThreadLocalValue;
 };
 using ExportedSymbolSeq = std::vector<ExportedSymbol>;
-using UUIDs = std::vector<std::pair<Architecture, std::string>>;
+using UUIDs = std::vector<std::pair<Target, std::string>>;
 
 inline bool operator<(const ExportedSymbol &lhs, const ExportedSymbol &rhs) {
   return std::tie(lhs.Kind, lhs.Name) < std::tie(rhs.Kind, rhs.Name);
@@ -93,11 +93,18 @@
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V3, File->getFileType());
   auto Archs = AK_armv7 | AK_arm64;
+  auto Platform = PlatformKind::iOS;
+  TargetList Targets;
+  for (auto &&arch : Archs)
+    Targets.emplace_back(Target(arch, Platform));
   EXPECT_EQ(Archs, File->getArchitectures());
-  UUIDs uuids = {{AK_armv7, "00000000-0000-0000-0000-000000000000"},
-                 {AK_arm64, "11111111-1111-1111-1111-111111111111"}};
-  EXPECT_EQ(uuids, File->uuids());
-  EXPECT_EQ(PlatformKind::iOS, File->getPlatform());
+  UUIDs Uuids = {{Target(AK_armv7, PlatformKind::unknown),
+                  "00000000-0000-0000-0000-000000000000"},
+                 {Target(AK_arm64, PlatformKind::unknown),
+                  "11111111-1111-1111-1111-111111111111"}};
+  EXPECT_EQ(Uuids, File->uuids());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
   EXPECT_EQ(std::string("Test.dylib"), File->getInstallName());
   EXPECT_EQ(PackedVersion(2, 3, 4), File->getCurrentVersion());
   EXPECT_EQ(PackedVersion(1, 0, 0), File->getCompatibilityVersion());
@@ -106,8 +113,8 @@
   EXPECT_TRUE(File->isTwoLevelNamespace());
   EXPECT_TRUE(File->isApplicationExtensionSafe());
   EXPECT_TRUE(File->isInstallAPI());
-  InterfaceFileRef client("clientA", Archs);
-  InterfaceFileRef reexport("/usr/lib/libfoo.dylib", Archs);
+  InterfaceFileRef client("clientA", Targets);
+  InterfaceFileRef reexport("/usr/lib/libfoo.dylib", Targets);
   EXPECT_EQ(1U, File->allowableClients().size());
   EXPECT_EQ(client, File->allowableClients().front());
   EXPECT_EQ(1U, File->reexportedLibraries().size());
@@ -151,27 +158,29 @@
       "...\n";
 
   InterfaceFile File;
+  TargetList Targets;
+  for (auto &&arch : AK_i386 | AK_x86_64)
+    Targets.emplace_back(Target(arch, PlatformKind::macOS));
   File.setPath("libfoo.dylib");
   File.setInstallName("/usr/lib/libfoo.dylib");
   File.setFileType(FileType::TBD_V3);
-  File.setArchitectures(AK_i386 | AK_x86_64);
-  File.setPlatform(PlatformKind::macOS);
+  File.addTargets(Targets);
   File.setCurrentVersion(PackedVersion(1, 2, 3));
   File.setTwoLevelNamespace();
   File.setApplicationExtensionSafe();
   File.setSwiftABIVersion(5);
   File.setObjCConstraint(ObjCConstraintType::Retain_Release);
-  File.addAllowableClient("clientA", AK_x86_64);
-  File.addReexportedLibrary("/usr/lib/libfoo.dylib", AK_x86_64);
-  File.addSymbol(SymbolKind::GlobalSymbol, "_sym1", AK_i386);
-  File.addSymbol(SymbolKind::GlobalSymbol, "_sym2", AK_i386,
+  File.addAllowableClient("clientA", Targets.at(1));
+  File.addReexportedLibrary("/usr/lib/libfoo.dylib", Targets.at(1));
+  File.addSymbol(SymbolKind::GlobalSymbol, "_sym1", {Targets.at(0)});
+  File.addSymbol(SymbolKind::GlobalSymbol, "_sym2", {Targets.at(0)},
                  SymbolFlags::WeakDefined);
-  File.addSymbol(SymbolKind::GlobalSymbol, "_sym3", AK_i386,
+  File.addSymbol(SymbolKind::GlobalSymbol, "_sym3", {Targets.at(0)},
                  SymbolFlags::ThreadLocalValue);
-  File.addSymbol(SymbolKind::ObjectiveCClass, "Class1", AK_x86_64);
-  File.addSymbol(SymbolKind::ObjectiveCClassEHType, "Class1", AK_x86_64);
+  File.addSymbol(SymbolKind::ObjectiveCClass, "Class1", {Targets.at(1)});
+  File.addSymbol(SymbolKind::ObjectiveCClassEHType, "Class1", {Targets.at(1)});
   File.addSymbol(SymbolKind::ObjectiveCInstanceVariable, "Class1._ivar1",
-                 AK_x86_64);
+                 {Targets.at(1)});
 
   SmallString<4096> Buffer;
   raw_svector_ostream OS(Buffer);
@@ -190,9 +199,11 @@
   auto Result =
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_macos, "Test.tbd"));
   EXPECT_TRUE(!!Result);
+  auto Platform = PlatformKind::macOS;
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V3, File->getFileType());
-  EXPECT_EQ(PlatformKind::macOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv3, Platform_iOS) {
@@ -205,9 +216,11 @@
   auto Result =
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_ios, "Test.tbd"));
   EXPECT_TRUE(!!Result);
+  auto Platform = PlatformKind::iOS;
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V3, File->getFileType());
-  EXPECT_EQ(PlatformKind::iOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv3, Platform_watchOS) {
@@ -220,9 +233,11 @@
   auto Result =
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_watchos, "Test.tbd"));
   EXPECT_TRUE(!!Result);
+  auto Platform = PlatformKind::watchOS;
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V3, File->getFileType());
-  EXPECT_EQ(PlatformKind::watchOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv3, Platform_tvOS) {
@@ -236,8 +251,10 @@
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_tvos, "Test.tbd"));
   EXPECT_TRUE(!!Result);
   auto File = std::move(Result.get());
+  auto Platform = PlatformKind::tvOS;
   EXPECT_EQ(FileType::TBD_V3, File->getFileType());
-  EXPECT_EQ(PlatformKind::tvOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv3, Platform_bridgeOS) {
@@ -250,9 +267,11 @@
   auto Result =
       TextAPIReader::get(MemoryBufferRef(tbd_v1_platform_bridgeos, "Test.tbd"));
   EXPECT_TRUE(!!Result);
+  auto Platform = PlatformKind::bridgeOS;
   auto File = std::move(Result.get());
   EXPECT_EQ(FileType::TBD_V3, File->getFileType());
-  EXPECT_EQ(PlatformKind::bridgeOS, File->getPlatform());
+  EXPECT_EQ(File->getPlatforms().size(), 1U);
+  EXPECT_EQ(Platform, *File->getPlatforms().begin());
 }
 
 TEST(TBDv3, Swift_1_0) {