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diff --git a/lib/Basic/Targets/AArch64.h b/lib/Basic/Targets/AArch64.h
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index 000000000000..33268f0f8d99
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+++ b/lib/Basic/Targets/AArch64.h
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+//===--- AArch64.h - Declare AArch64 target feature support -----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares AArch64 TargetInfo objects.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_AARCH64_H
+#define LLVM_CLANG_LIB_BASIC_TARGETS_AARCH64_H
+
+#include "OSTargets.h"
+#include "clang/Basic/TargetBuiltins.h"
+#include "llvm/Support/TargetParser.h"
+
+namespace clang {
+namespace targets {
+
+class LLVM_LIBRARY_VISIBILITY AArch64TargetInfo : public TargetInfo {
+  virtual void setDataLayout() = 0;
+  static const TargetInfo::GCCRegAlias GCCRegAliases[];
+  static const char *const GCCRegNames[];
+
+  enum FPUModeEnum { FPUMode, NeonMode = (1 << 0), SveMode = (1 << 1) };
+
+  unsigned FPU;
+  unsigned CRC;
+  unsigned Crypto;
+  unsigned Unaligned;
+  unsigned HasFullFP16;
+  llvm::AArch64::ArchKind ArchKind;
+
+  static const Builtin::Info BuiltinInfo[];
+
+  std::string ABI;
+
+public:
+  AArch64TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
+
+  StringRef getABI() const override;
+  bool setABI(const std::string &Name) override;
+
+  bool isValidCPUName(StringRef Name) const override;
+  bool setCPU(const std::string &Name) override;
+
+  bool useFP16ConversionIntrinsics() const override {
+    return false;
+  }
+
+  void getTargetDefinesARMV81A(const LangOptions &Opts,
+                               MacroBuilder &Builder) const;
+  void getTargetDefinesARMV82A(const LangOptions &Opts,
+                               MacroBuilder &Builder) const;
+  void getTargetDefines(const LangOptions &Opts,
+                        MacroBuilder &Builder) const override;
+
+  ArrayRef<Builtin::Info> getTargetBuiltins() const override;
+
+  bool hasFeature(StringRef Feature) const override;
+  bool handleTargetFeatures(std::vector<std::string> &Features,
+                            DiagnosticsEngine &Diags) override;
+
+  CallingConvCheckResult checkCallingConvention(CallingConv CC) const override;
+
+  bool isCLZForZeroUndef() const override;
+
+  BuiltinVaListKind getBuiltinVaListKind() const override;
+
+  ArrayRef<const char *> getGCCRegNames() const override;
+  ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override;
+  bool validateAsmConstraint(const char *&Name,
+                             TargetInfo::ConstraintInfo &Info) const override;
+  bool
+  validateConstraintModifier(StringRef Constraint, char Modifier, unsigned Size,
+                             std::string &SuggestedModifier) const override;
+  const char *getClobbers() const override;
+
+  int getEHDataRegisterNumber(unsigned RegNo) const override;
+};
+
+class LLVM_LIBRARY_VISIBILITY AArch64leTargetInfo : public AArch64TargetInfo {
+public:
+  AArch64leTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
+
+  void getTargetDefines(const LangOptions &Opts,
+                            MacroBuilder &Builder) const override;
+private:
+  void setDataLayout() override;
+};
+
+class LLVM_LIBRARY_VISIBILITY WindowsARM64TargetInfo
+    : public WindowsTargetInfo<AArch64leTargetInfo> {
+  const llvm::Triple Triple;
+
+public:
+  WindowsARM64TargetInfo(const llvm::Triple &Triple,
+                         const TargetOptions &Opts);
+
+  void setDataLayout() override;
+
+  BuiltinVaListKind getBuiltinVaListKind() const override;
+
+  CallingConvCheckResult checkCallingConvention(CallingConv CC) const override;
+};
+
+// Windows ARM, MS (C++) ABI
+class LLVM_LIBRARY_VISIBILITY MicrosoftARM64TargetInfo
+    : public WindowsARM64TargetInfo {
+public:
+  MicrosoftARM64TargetInfo(const llvm::Triple &Triple,
+                           const TargetOptions &Opts);
+
+  void getVisualStudioDefines(const LangOptions &Opts,
+                              MacroBuilder &Builder) const;
+  void getTargetDefines(const LangOptions &Opts,
+                        MacroBuilder &Builder) const override;
+};
+
+// ARM64 MinGW target
+class LLVM_LIBRARY_VISIBILITY MinGWARM64TargetInfo
+    : public WindowsARM64TargetInfo {
+public:
+  MinGWARM64TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
+};
+
+class LLVM_LIBRARY_VISIBILITY AArch64beTargetInfo : public AArch64TargetInfo {
+public:
+  AArch64beTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
+  void getTargetDefines(const LangOptions &Opts,
+                        MacroBuilder &Builder) const override;
+
+private:
+  void setDataLayout() override;
+};
+
+class LLVM_LIBRARY_VISIBILITY DarwinAArch64TargetInfo
+    : public DarwinTargetInfo<AArch64leTargetInfo> {
+public:
+  DarwinAArch64TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
+
+  BuiltinVaListKind getBuiltinVaListKind() const override;
+
+ protected:
+  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
+                    MacroBuilder &Builder) const override;
+};
+
+// 64-bit RenderScript is aarch64
+class LLVM_LIBRARY_VISIBILITY RenderScript64TargetInfo
+    : public AArch64leTargetInfo {
+public:
+  RenderScript64TargetInfo(const llvm::Triple &Triple,
+                           const TargetOptions &Opts);
+
+  void getTargetDefines(const LangOptions &Opts,
+                        MacroBuilder &Builder) const override;
+};
+
+} // namespace targets
+} // namespace clang
+
+#endif // LLVM_CLANG_LIB_BASIC_TARGETS_AARCH64_H