diff --git a/include/llvm/Support/ErrorOr.h b/include/llvm/Support/ErrorOr.h
index 6832e3df2f9..148494c5d87 100644
--- a/include/llvm/Support/ErrorOr.h
+++ b/include/llvm/Support/ErrorOr.h
@@ -27,38 +27,6 @@
 #endif
 
 namespace llvm {
-struct ErrorHolderBase {
-  error_code Error;
-  uint16_t RefCount;
-  bool HasUserData;
-
-  ErrorHolderBase() : RefCount(1) {}
-
-  void acquire() {
-    ++RefCount;
-  }
-
-  void release() {
-    if (--RefCount == 0)
-      delete this;
-  }
-
-protected:
-  virtual ~ErrorHolderBase() {}
-};
-
-template<class T>
-struct ErrorHolder : ErrorHolderBase {
-#if LLVM_HAS_RVALUE_REFERENCES
-  ErrorHolder(T &&UD) : UserData(llvm_move(UD)) {}
-#else
-  ErrorHolder(T &UD) : UserData(UD) {}
-#endif
-  T UserData;
-};
-
-template<class Tp> struct ErrorOrUserDataTraits : llvm::false_type {};
-
 #if LLVM_HAS_CXX11_TYPETRAITS && LLVM_HAS_RVALUE_REFERENCES
 template<class T, class V>
 typename std::enable_if< std::is_constructible<T, V>::value
@@ -111,44 +79,6 @@ public:
 ///   buffer->write("adena");
 /// \endcode
 ///
-/// ErrorOr<T> also supports user defined data for specific error_codes. To use
-/// this feature you must first add a template specialization of
-/// ErrorOrUserDataTraits derived from std::true_type for your type in the lld
-/// namespace. This specialization must have a static error_code error()
-/// function that returns the error_code this data is used with.
-///
-/// getError<UserData>() may be called to get either the stored user data, or
-/// a default constructed UserData if none was stored.
-///
-/// Example:
-/// \code
-///   struct InvalidArgError {
-///     InvalidArgError() {}
-///     InvalidArgError(std::string S) : ArgName(S) {}
-///     std::string ArgName;
-///   };
-///
-///   namespace llvm {
-///   template<>
-///   struct ErrorOrUserDataTraits<InvalidArgError> : std::true_type {
-///     static error_code error() {
-///       return make_error_code(errc::invalid_argument);
-///     }
-///   };
-///   } // end namespace llvm
-///
-///   using namespace llvm;
-///
-///   ErrorOr<int> foo() {
-///     return InvalidArgError("adena");
-///   }
-///
-///   int main() {
-///     auto a = foo();
-///     if (!a && error_code(a) == errc::invalid_argument)
-///       llvm::errs() << a.getError<InvalidArgError>().ArgName << "\n";
-///   }
-/// \endcode
 ///
 /// An implicit conversion to bool provides a way to check if there was an
 /// error. The unary * and -> operators provide pointer like access to the
@@ -185,24 +115,11 @@ public:
                                             is_error_condition_enum<E>::value,
                                             void *>::type = 0)
       : HasError(true), IsValid(true) {
-    Error = new ErrorHolderBase;
-    Error->Error = make_error_code(ErrorCode);
-    Error->HasUserData = false;
+    Error = make_error_code(ErrorCode);
   }
 
   ErrorOr(llvm::error_code EC) : HasError(true), IsValid(true) {
-    Error = new ErrorHolderBase;
-    Error->Error = EC;
-    Error->HasUserData = false;
-  }
-
-  template<class UserDataT>
-  ErrorOr(UserDataT UD, typename
-          enable_if_c<ErrorOrUserDataTraits<UserDataT>::value>::type* = 0)
-    : HasError(true), IsValid(true) {
-    Error = new ErrorHolder<UserDataT>(llvm_move(UD));
-    Error->Error = ErrorOrUserDataTraits<UserDataT>::error();
-    Error->HasUserData = true;
+    Error = EC;
   }
 
   ErrorOr(T Val) : HasError(false), IsValid(true) {
@@ -254,23 +171,10 @@ public:
   ~ErrorOr() {
     if (!IsValid)
       return;
-    if (HasError)
-      Error->release();
-    else
+    if (!HasError)
       get()->~storage_type();
   }
 
-  template<class ET>
-  ET getError() const {
-    assert(IsValid && "Cannot get the error of a default constructed ErrorOr!");
-    assert(HasError && "Cannot get an error if none exists!");
-    assert(ErrorOrUserDataTraits<ET>::error() == Error->Error &&
-           "Incorrect user error data type for error!");
-    if (!Error->HasUserData)
-      return ET();
-    return reinterpret_cast<const ErrorHolder<ET>*>(Error)->UserData;
-  }
-
   typedef void (*unspecified_bool_type)();
   static void unspecified_bool_true() {}
 
@@ -282,7 +186,7 @@ public:
 
   operator llvm::error_code() const {
     assert(IsValid && "Can't do anything on a default constructed ErrorOr!");
-    return HasError ? Error->Error : llvm::error_code::success();
+    return HasError ? Error : llvm::error_code::success();
   }
 
   pointer operator ->() {
@@ -308,7 +212,6 @@ private:
       // Get other's error.
       Error = Other.Error;
       HasError = true;
-      Error->acquire();
     }
   }
 
@@ -385,124 +288,12 @@ private:
 
   union {
     AlignedCharArrayUnion<storage_type> TStorage;
-    ErrorHolderBase *Error;
+    error_code Error;
   };
   bool HasError : 1;
   bool IsValid : 1;
 };
 
-// ErrorOr specialization for void.
-template <>
-class ErrorOr<void> {
-public:
-  ErrorOr() : Error(0, 0) {}
-
-  template <class E>
-  ErrorOr(E ErrorCode, typename enable_if_c<is_error_code_enum<E>::value ||
-                                            is_error_condition_enum<E>::value,
-                                            void *> ::type = 0)
-      : Error(0, 0) {
-    error_code EC = make_error_code(ErrorCode);
-    if (EC == errc::success) {
-      Error.setInt(1);
-      return;
-    }
-    ErrorHolderBase *EHB = new ErrorHolderBase;
-    EHB->Error = EC;
-    EHB->HasUserData = false;
-    Error.setPointer(EHB);
-  }
-
-  ErrorOr(llvm::error_code EC) : Error(0, 0) {
-    if (EC == errc::success) {
-      Error.setInt(1);
-      return;
-    }
-    ErrorHolderBase *E = new ErrorHolderBase;
-    E->Error = EC;
-    E->HasUserData = false;
-    Error.setPointer(E);
-  }
-
-  template<class UserDataT>
-  ErrorOr(UserDataT UD, typename
-          enable_if_c<ErrorOrUserDataTraits<UserDataT>::value>::type* = 0)
-      : Error(0, 0) {
-    ErrorHolderBase *E = new ErrorHolder<UserDataT>(llvm_move(UD));
-    E->Error = ErrorOrUserDataTraits<UserDataT>::error();
-    E->HasUserData = true;
-    Error.setPointer(E);
-  }
-
-  ErrorOr(const ErrorOr &Other) : Error(0, 0) {
-    Error = Other.Error;
-    if (Other.Error.getPointer()->Error) {
-      Error.getPointer()->acquire();
-    }
-  }
-
-  ErrorOr &operator =(const ErrorOr &Other) {
-    if (this == &Other)
-      return *this;
-
-    this->~ErrorOr();
-    new (this) ErrorOr(Other);
-
-    return *this;
-  }
-
-#if LLVM_HAS_RVALUE_REFERENCES
-  ErrorOr(ErrorOr &&Other) : Error(0) {
-    // Get other's error.
-    Error = Other.Error;
-    // Tell other not to do any destruction.
-    Other.Error.setPointer(0);
-  }
-
-  ErrorOr &operator =(ErrorOr &&Other) {
-    if (this == &Other)
-      return *this;
-
-    this->~ErrorOr();
-    new (this) ErrorOr(std::move(Other));
-
-    return *this;
-  }
-#endif
-
-  ~ErrorOr() {
-    if (Error.getPointer())
-      Error.getPointer()->release();
-  }
-
-  template<class ET>
-  ET getError() const {
-    assert(ErrorOrUserDataTraits<ET>::error() == *this &&
-           "Incorrect user error data type for error!");
-    if (!Error.getPointer()->HasUserData)
-      return ET();
-    return reinterpret_cast<const ErrorHolder<ET> *>(
-        Error.getPointer())->UserData;
-  }
-
-  typedef void (*unspecified_bool_type)();
-  static void unspecified_bool_true() {}
-
-  /// \brief Return false if there is an error.
-  operator unspecified_bool_type() const {
-    return Error.getInt() ? unspecified_bool_true : 0;
-  }
-
-  operator llvm::error_code() const {
-    return Error.getInt() ? make_error_code(errc::success)
-                          : Error.getPointer()->Error;
-  }
-
-private:
-  // If the bit is 1, the error is success.
-  llvm::PointerIntPair<ErrorHolderBase *, 1> Error;
-};
-
 template<class T, class E>
 typename enable_if_c<is_error_code_enum<E>::value ||
                      is_error_condition_enum<E>::value, bool>::type
diff --git a/unittests/Support/ErrorOrTest.cpp b/unittests/Support/ErrorOrTest.cpp
index 4853426c947..feb6a086e19 100644
--- a/unittests/Support/ErrorOrTest.cpp
+++ b/unittests/Support/ErrorOrTest.cpp
@@ -45,9 +45,6 @@ TEST(ErrorOr, Types) {
   *a = 42;
   EXPECT_EQ(42, x);
 
-  EXPECT_FALSE(ErrorOr<void>(errc::broken_pipe));
-  EXPECT_TRUE(ErrorOr<void>(errc::success));
-
 #if LLVM_HAS_CXX11_STDLIB
   // Move only types.
   EXPECT_EQ(3, **t3());
@@ -67,38 +64,3 @@ TEST(ErrorOr, Covariant) {
 #endif
 }
 } // end anon namespace
-
-struct InvalidArgError {
-  InvalidArgError() {}
-  InvalidArgError(std::string S) : ArgName(S) {}
-  std::string ArgName;
-};
-
-namespace llvm {
-template<>
-struct ErrorOrUserDataTraits<InvalidArgError> : true_type {
-  static error_code error() {
-    return make_error_code(errc::invalid_argument);
-  }
-};
-} // end namespace llvm
-
-ErrorOr<int> t4() {
-  return InvalidArgError("adena");
-}
-
-ErrorOr<void> t5() {
-  return InvalidArgError("pie");
-}
-
-namespace {
-TEST(ErrorOr, UserErrorData) {
-  ErrorOr<int> a = t4();
-  EXPECT_EQ(errc::invalid_argument, a);
-  EXPECT_EQ("adena", t4().getError<InvalidArgError>().ArgName);
-  
-  ErrorOr<void> b = t5();
-  EXPECT_EQ(errc::invalid_argument, b);
-  EXPECT_EQ("pie", b.getError<InvalidArgError>().ArgName);
-}
-} // end anon namespace