Index: include/memory
===================================================================
--- include/memory
+++ include/memory
@@ -3657,10 +3657,13 @@
 class __shared_ptr_emplace
     : public __shared_weak_count
 {
+private:
     __compressed_pair<_Alloc, _Tp> __data_;
-public:
-#ifndef _LIBCPP_HAS_NO_VARIADICS
 
+    virtual void __on_zero_shared() _NOEXCEPT;
+    virtual void __on_zero_shared_weak() _NOEXCEPT;
+
+public:
     _LIBCPP_INLINE_VISIBILITY
     __shared_ptr_emplace(_Alloc __a)
         :  __data_(_VSTD::move(__a)) {}
@@ -3671,33 +3674,6 @@
             :  __data_(piecewise_construct, _VSTD::forward_as_tuple(__a),
                    _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...)) {}
 
-#else  // _LIBCPP_HAS_NO_VARIADICS
-
-    _LIBCPP_INLINE_VISIBILITY
-    __shared_ptr_emplace(_Alloc __a)
-        :  __data_(__a) {}
-
-    template <class _A0>
-        _LIBCPP_INLINE_VISIBILITY
-        __shared_ptr_emplace(_Alloc __a, _A0& __a0)
-            :  __data_(__a, _Tp(__a0)) {}
-
-    template <class _A0, class _A1>
-        _LIBCPP_INLINE_VISIBILITY
-        __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1)
-            :  __data_(__a, _Tp(__a0, __a1)) {}
-
-    template <class _A0, class _A1, class _A2>
-        _LIBCPP_INLINE_VISIBILITY
-        __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1, _A2& __a2)
-            :  __data_(__a, _Tp(__a0, __a1, __a2)) {}
-
-#endif  // _LIBCPP_HAS_NO_VARIADICS
-
-private:
-    virtual void __on_zero_shared() _NOEXCEPT;
-    virtual void __on_zero_shared_weak() _NOEXCEPT;
-public:
     _LIBCPP_INLINE_VISIBILITY
     _Tp* get() _NOEXCEPT {return _VSTD::addressof(__data_.second());}
 };
@@ -3738,18 +3714,18 @@
 template<class _Tp>
 class _LIBCPP_TEMPLATE_VIS shared_ptr
 {
-public:
-    typedef _Tp element_type;
-
-#if _LIBCPP_STD_VER > 14
-    typedef weak_ptr<_Tp> weak_type;
-#endif
 private:
-    element_type*      __ptr_;
+    _Tp*                 __ptr_;
     __shared_weak_count* __cntrl_;
 
     struct __nat {int __for_bool_;};
 public:
+#if _LIBCPP_STD_VER > 14
+    typedef weak_ptr<_Tp> weak_type;
+#endif
+
+    typedef _Tp element_type;
+
     _LIBCPP_INLINE_VISIBILITY
     _LIBCPP_CONSTEXPR shared_ptr() _NOEXCEPT;
     _LIBCPP_INLINE_VISIBILITY
@@ -3793,45 +3769,24 @@
                    typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat());
 #endif
 #endif
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
-    template <class _Yp, class _Dp>
-        shared_ptr(unique_ptr<_Yp, _Dp>&&,
-                   typename enable_if
-                   <
-                       !is_lvalue_reference<_Dp>::value &&
-                       !is_array<_Yp>::value &&
-                       is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value,
-                       __nat
-                   >::type = __nat());
     template <class _Yp, class _Dp>
-        shared_ptr(unique_ptr<_Yp, _Dp>&&,
-                   typename enable_if
-                   <
-                       is_lvalue_reference<_Dp>::value &&
-                       !is_array<_Yp>::value &&
-                       is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value,
-                       __nat
-                   >::type = __nat());
-#else  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
-    template <class _Yp, class _Dp>
-        shared_ptr(unique_ptr<_Yp, _Dp>,
-                   typename enable_if
-                   <
-                       !is_lvalue_reference<_Dp>::value &&
-                       !is_array<_Yp>::value &&
-                       is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value,
-                       __nat
-                   >::type = __nat());
+    shared_ptr(unique_ptr<_Yp, _Dp>&& __r,
+        typename enable_if
+        <
+            !is_array<_Yp>::value &&
+            is_convertible<typename unique_ptr<_Yp, _Dp>::pointer,
+                                element_type*>::value,
+            __nat
+        >::type = __nat());
     template <class _Yp, class _Dp>
-        shared_ptr(unique_ptr<_Yp, _Dp>,
-                   typename enable_if
-                   <
-                       is_lvalue_reference<_Dp>::value &&
-                       !is_array<_Yp>::value &&
-                       is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value,
-                       __nat
-                   >::type = __nat());
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+    shared_ptr(unique_ptr<_Yp, _Dp&>&& __r,
+        typename enable_if
+        <
+            !is_array<_Yp>::value &&
+            is_convertible<typename unique_ptr<_Yp, _Dp>::pointer,
+                                element_type*>::value,
+            __nat
+        >::type = __nat());
 
     ~shared_ptr();
 
@@ -3959,8 +3914,6 @@
                       : nullptr);}
 #endif  // _LIBCPP_NO_RTTI
 
-#ifndef _LIBCPP_HAS_NO_VARIADICS
-
     template<class ..._Args>
         static
         shared_ptr<_Tp>
@@ -3971,37 +3924,6 @@
         shared_ptr<_Tp>
         allocate_shared(const _Alloc& __a, _Args&& ...__args);
 
-#else  // _LIBCPP_HAS_NO_VARIADICS
-
-    static shared_ptr<_Tp> make_shared();
-
-    template<class _A0>
-        static shared_ptr<_Tp> make_shared(_A0&);
-
-    template<class _A0, class _A1>
-        static shared_ptr<_Tp> make_shared(_A0&, _A1&);
-
-    template<class _A0, class _A1, class _A2>
-        static shared_ptr<_Tp> make_shared(_A0&, _A1&, _A2&);
-
-    template<class _Alloc>
-        static shared_ptr<_Tp>
-        allocate_shared(const _Alloc& __a);
-
-    template<class _Alloc, class _A0>
-        static shared_ptr<_Tp>
-        allocate_shared(const _Alloc& __a, _A0& __a0);
-
-    template<class _Alloc, class _A0, class _A1>
-        static shared_ptr<_Tp>
-        allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1);
-
-    template<class _Alloc, class _A0, class _A1, class _A2>
-        static shared_ptr<_Tp>
-        allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2);
-
-#endif  // _LIBCPP_HAS_NO_VARIADICS
-
 private:
     template <class _Yp, bool = is_function<_Yp>::value>
         struct __shared_ptr_default_allocator
@@ -4036,6 +3958,52 @@
 
     template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr;
     template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr;
+
+    template<class _Yp, class _Deleter = default_delete<_Yp>,
+                        class _Alloc = typename __shared_ptr_default_allocator<_Yp>::type>
+    static __shared_weak_count*
+    __allocate_shared(_Yp* __p, _Deleter __d = _Deleter {}, _Alloc __a = _Alloc {})
+    {
+        try {
+            typedef __shared_ptr_pointer<_Yp*, _Deleter, _Alloc> _CT;
+            typedef typename __allocator_traits_rebind<_Alloc, _CT>::type _A2;
+            typedef __allocator_destructor<_A2> _D2;
+
+            _A2 __a2(__a);
+            unique_ptr<_CT, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1));
+
+            ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
+                _CT(__p, __d, __a);
+
+            return _VSTD::addressof(*__hold2.release());
+        } catch (...) {
+            __d(__p);
+            throw;
+        }
+    }
+
+    template<class _Deleter = default_delete<_Tp>,
+             class _Alloc = typename __shared_ptr_default_allocator<_Tp>::type>
+    static __shared_weak_count*
+    __allocate_shared(nullptr_t __p, _Deleter __d = _Deleter {}, _Alloc __a = _Alloc {})
+    {
+        try {
+            typedef __shared_ptr_pointer<_Tp*, _Deleter, _Alloc> _CT;
+            typedef typename __allocator_traits_rebind<_Alloc, _CT>::type _A2;
+            typedef __allocator_destructor<_A2> _D2;
+
+            _A2 __a2(__a);
+            unique_ptr<_CT, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1));
+
+            ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
+                _CT(__p, __d, __a);
+
+            return _VSTD::addressof(*__hold2.release());
+        } catch (...) {
+            __d(__p);
+            throw;
+        }
+    }
 };
 
 
@@ -4044,30 +4012,22 @@
 _LIBCPP_CONSTEXPR
 shared_ptr<_Tp>::shared_ptr() _NOEXCEPT
     : __ptr_(0),
-      __cntrl_(0)
-{
-}
+      __cntrl_(0) {}
 
 template<class _Tp>
 inline
 _LIBCPP_CONSTEXPR
 shared_ptr<_Tp>::shared_ptr(nullptr_t) _NOEXCEPT
     : __ptr_(0),
-      __cntrl_(0)
-{
-}
+      __cntrl_(0) {}
 
 template<class _Tp>
 template<class _Yp>
 shared_ptr<_Tp>::shared_ptr(_Yp* __p,
                             typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
-    : __ptr_(__p)
+    : __ptr_(__p),
+      __cntrl_(__allocate_shared(__p))
 {
-    unique_ptr<_Yp> __hold(__p);
-    typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT;
-    typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, _AllocT > _CntrlBlk;
-    __cntrl_ = new _CntrlBlk(__p, default_delete<_Yp>(), _AllocT());
-    __hold.release();
     __enable_weak_this(__p, __p);
 }
 
@@ -4075,103 +4035,33 @@
 template<class _Yp, class _Dp>
 shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d,
                             typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
-    : __ptr_(__p)
+    : __ptr_(__p),
+      __cntrl_(__allocate_shared(__p, __d))
 {
-#ifndef _LIBCPP_NO_EXCEPTIONS
-    try
-    {
-#endif  // _LIBCPP_NO_EXCEPTIONS
-        typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT;
-        typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk;
-        __cntrl_ = new _CntrlBlk(__p, __d, _AllocT());
-        __enable_weak_this(__p, __p);
-#ifndef _LIBCPP_NO_EXCEPTIONS
-    }
-    catch (...)
-    {
-        __d(__p);
-        throw;
-    }
-#endif  // _LIBCPP_NO_EXCEPTIONS
+    __enable_weak_this(__p, __p);
 }
 
 template<class _Tp>
 template<class _Dp>
 shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d)
-    : __ptr_(0)
-{
-#ifndef _LIBCPP_NO_EXCEPTIONS
-    try
-    {
-#endif  // _LIBCPP_NO_EXCEPTIONS
-        typedef typename __shared_ptr_default_allocator<_Tp>::type _AllocT;
-        typedef __shared_ptr_pointer<nullptr_t, _Dp, _AllocT > _CntrlBlk;
-        __cntrl_ = new _CntrlBlk(__p, __d, _AllocT());
-#ifndef _LIBCPP_NO_EXCEPTIONS
-    }
-    catch (...)
-    {
-        __d(__p);
-        throw;
-    }
-#endif  // _LIBCPP_NO_EXCEPTIONS
-}
+    : __ptr_(0),
+      __cntrl_(__allocate_shared(__p, __d)) {}
 
 template<class _Tp>
 template<class _Yp, class _Dp, class _Alloc>
 shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, _Alloc __a,
                             typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
-    : __ptr_(__p)
+    : __ptr_(__p),
+      __cntrl_(__allocate_shared(__p, __d, __a))
 {
-#ifndef _LIBCPP_NO_EXCEPTIONS
-    try
-    {
-#endif  // _LIBCPP_NO_EXCEPTIONS
-        typedef __shared_ptr_pointer<_Yp*, _Dp, _Alloc> _CntrlBlk;
-        typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2;
-        typedef __allocator_destructor<_A2> _D2;
-        _A2 __a2(__a);
-        unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1));
-        ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
-            _CntrlBlk(__p, __d, __a);
-        __cntrl_ = _VSTD::addressof(*__hold2.release());
-        __enable_weak_this(__p, __p);
-#ifndef _LIBCPP_NO_EXCEPTIONS
-    }
-    catch (...)
-    {
-        __d(__p);
-        throw;
-    }
-#endif  // _LIBCPP_NO_EXCEPTIONS
+    __enable_weak_this(__p, __p);
 }
 
 template<class _Tp>
 template<class _Dp, class _Alloc>
 shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a)
-    : __ptr_(0)
-{
-#ifndef _LIBCPP_NO_EXCEPTIONS
-    try
-    {
-#endif  // _LIBCPP_NO_EXCEPTIONS
-        typedef __shared_ptr_pointer<nullptr_t, _Dp, _Alloc> _CntrlBlk;
-        typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2;
-        typedef __allocator_destructor<_A2> _D2;
-        _A2 __a2(__a);
-        unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1));
-        ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
-            _CntrlBlk(__p, __d, __a);
-        __cntrl_ = _VSTD::addressof(*__hold2.release());
-#ifndef _LIBCPP_NO_EXCEPTIONS
-    }
-    catch (...)
-    {
-        __d(__p);
-        throw;
-    }
-#endif  // _LIBCPP_NO_EXCEPTIONS
-}
+    : __ptr_(0),
+      __cntrl_(__allocate_shared(__p, __d, __a)) {}
 
 template<class _Tp>
 template<class _Yp>
@@ -4254,16 +4144,12 @@
 
 template<class _Tp>
 template <class _Yp, class _Dp>
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r,
-#else
-shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r,
-#endif
                             typename enable_if
                             <
-                                !is_lvalue_reference<_Dp>::value &&
                                 !is_array<_Yp>::value &&
-                                is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value,
+                                is_convertible<typename unique_ptr<_Yp, _Dp>::pointer,
+                                                    element_type*>::value,
                                 __nat
                             >::type)
     : __ptr_(__r.get())
@@ -4275,8 +4161,10 @@
 #endif
     {
         typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT;
-        typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk;
-        __cntrl_ = new _CntrlBlk(__r.get(), __r.get_deleter(), _AllocT());
+        typedef __shared_ptr_pointer<_Yp*,
+                                     reference_wrapper<typename remove_reference<_Dp>::type>,
+                                     _AllocT > _CntrlBlk;
+        __cntrl_ = new _CntrlBlk(__r.get(), ref(__r.get_deleter()), _AllocT());
         __enable_weak_this(__r.get(), __r.get());
     }
     __r.release();
@@ -4284,16 +4172,12 @@
 
 template<class _Tp>
 template <class _Yp, class _Dp>
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
-shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r,
-#else
-shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r,
-#endif
+shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp&>&& __r,
                             typename enable_if
                             <
-                                is_lvalue_reference<_Dp>::value &&
                                 !is_array<_Yp>::value &&
-                                is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value,
+                                is_convertible<typename unique_ptr<_Yp, _Dp>::pointer,
+                                                    element_type*>::value,
                                 __nat
                             >::type)
     : __ptr_(__r.get())
@@ -4305,17 +4189,13 @@
 #endif
     {
         typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT;
-        typedef __shared_ptr_pointer<_Yp*,
-                                     reference_wrapper<typename remove_reference<_Dp>::type>,
-                                     _AllocT > _CntrlBlk;
-        __cntrl_ = new _CntrlBlk(__r.get(), ref(__r.get_deleter()), _AllocT());
+        typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk;
+        __cntrl_ = new _CntrlBlk(__r.get(), __r.get_deleter(), _AllocT());
         __enable_weak_this(__r.get(), __r.get());
     }
     __r.release();
 }
 
-#ifndef _LIBCPP_HAS_NO_VARIADICS
-
 template<class _Tp>
 template<class ..._Args>
 shared_ptr<_Tp>
@@ -4325,9 +4205,11 @@
     typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk;
     typedef allocator<_CntrlBlk> _A2;
     typedef __allocator_destructor<_A2> _D2;
+
     _A2 __a2;
     unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1));
     ::new(__hold2.get()) _CntrlBlk(__a2, _VSTD::forward<_Args>(__args)...);
+
     shared_ptr<_Tp> __r;
     __r.__ptr_ = __hold2.get()->get();
     __r.__cntrl_ = __hold2.release();
@@ -4340,111 +4222,17 @@
 shared_ptr<_Tp>
 shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _Args&& ...__args)
 {
-    static_assert( is_constructible<_Tp, _Args...>::value, "Can't construct object in allocate_shared" );
+    static_assert(is_constructible<_Tp, _Args...>::value, "Can't construct object in allocate_shared");
+
     typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk;
     typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2;
     typedef __allocator_destructor<_A2> _D2;
+
     _A2 __a2(__a);
     unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1));
     ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
         _CntrlBlk(__a, _VSTD::forward<_Args>(__args)...);
-    shared_ptr<_Tp> __r;
-    __r.__ptr_ = __hold2.get()->get();
-    __r.__cntrl_ = _VSTD::addressof(*__hold2.release());
-    __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
-    return __r;
-}
-
-#else  // _LIBCPP_HAS_NO_VARIADICS
-
-template<class _Tp>
-shared_ptr<_Tp>
-shared_ptr<_Tp>::make_shared()
-{
-    static_assert((is_constructible<_Tp>::value), "Can't construct object in make_shared" );
-    typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk;
-    typedef allocator<_CntrlBlk> _Alloc2;
-    typedef __allocator_destructor<_Alloc2> _D2;
-    _Alloc2 __alloc2;
-    unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
-    ::new(__hold2.get()) _CntrlBlk(__alloc2);
-    shared_ptr<_Tp> __r;
-    __r.__ptr_ = __hold2.get()->get();
-    __r.__cntrl_ = __hold2.release();
-    __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
-    return __r;
-}
-
-template<class _Tp>
-template<class _A0>
-shared_ptr<_Tp>
-shared_ptr<_Tp>::make_shared(_A0& __a0)
-{
-    static_assert((is_constructible<_Tp, _A0>::value), "Can't construct object in make_shared" );
-    typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk;
-    typedef allocator<_CntrlBlk> _Alloc2;
-    typedef __allocator_destructor<_Alloc2> _D2;
-    _Alloc2 __alloc2;
-    unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
-    ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0);
-    shared_ptr<_Tp> __r;
-    __r.__ptr_ = __hold2.get()->get();
-    __r.__cntrl_ = __hold2.release();
-    __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
-    return __r;
-}
-
-template<class _Tp>
-template<class _A0, class _A1>
-shared_ptr<_Tp>
-shared_ptr<_Tp>::make_shared(_A0& __a0, _A1& __a1)
-{
-    static_assert((is_constructible<_Tp, _A0, _A1>::value), "Can't construct object in make_shared" );
-    typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk;
-    typedef allocator<_CntrlBlk> _Alloc2;
-    typedef __allocator_destructor<_Alloc2> _D2;
-    _Alloc2 __alloc2;
-    unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
-    ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0, __a1);
-    shared_ptr<_Tp> __r;
-    __r.__ptr_ = __hold2.get()->get();
-    __r.__cntrl_ = __hold2.release();
-    __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
-    return __r;
-}
-
-template<class _Tp>
-template<class _A0, class _A1, class _A2>
-shared_ptr<_Tp>
-shared_ptr<_Tp>::make_shared(_A0& __a0, _A1& __a1, _A2& __a2)
-{
-    static_assert((is_constructible<_Tp, _A0, _A1, _A2>::value), "Can't construct object in make_shared" );
-    typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk;
-    typedef allocator<_CntrlBlk> _Alloc2;
-    typedef __allocator_destructor<_Alloc2> _D2;
-    _Alloc2 __alloc2;
-    unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
-    ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0, __a1, __a2);
-    shared_ptr<_Tp> __r;
-    __r.__ptr_ = __hold2.get()->get();
-    __r.__cntrl_ = __hold2.release();
-    __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
-    return __r;
-}
 
-template<class _Tp>
-template<class _Alloc>
-shared_ptr<_Tp>
-shared_ptr<_Tp>::allocate_shared(const _Alloc& __a)
-{
-    static_assert((is_constructible<_Tp>::value), "Can't construct object in allocate_shared" );
-    typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk;
-    typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2;
-    typedef __allocator_destructor<_Alloc2> _D2;
-    _Alloc2 __alloc2(__a);
-    unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
-    ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
-        _CntrlBlk(__a);
     shared_ptr<_Tp> __r;
     __r.__ptr_ = __hold2.get()->get();
     __r.__cntrl_ = _VSTD::addressof(*__hold2.release());
@@ -4452,68 +4240,6 @@
     return __r;
 }
 
-template<class _Tp>
-template<class _Alloc, class _A0>
-shared_ptr<_Tp>
-shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0)
-{
-    static_assert((is_constructible<_Tp, _A0>::value), "Can't construct object in allocate_shared" );
-    typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk;
-    typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2;
-    typedef __allocator_destructor<_Alloc2> _D2;
-    _Alloc2 __alloc2(__a);
-    unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
-    ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
-        _CntrlBlk(__a, __a0);
-    shared_ptr<_Tp> __r;
-    __r.__ptr_ = __hold2.get()->get();
-    __r.__cntrl_ = _VSTD::addressof(*__hold2.release());
-    __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
-    return __r;
-}
-
-template<class _Tp>
-template<class _Alloc, class _A0, class _A1>
-shared_ptr<_Tp>
-shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1)
-{
-    static_assert((is_constructible<_Tp, _A0, _A1>::value), "Can't construct object in allocate_shared" );
-    typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk;
-    typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2;
-    typedef __allocator_destructor<_Alloc2> _D2;
-    _Alloc2 __alloc2(__a);
-    unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
-    ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
-        _CntrlBlk(__a, __a0, __a1);
-    shared_ptr<_Tp> __r;
-    __r.__ptr_ = __hold2.get()->get();
-    __r.__cntrl_ = _VSTD::addressof(*__hold2.release());
-    __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
-    return __r;
-}
-
-template<class _Tp>
-template<class _Alloc, class _A0, class _A1, class _A2>
-shared_ptr<_Tp>
-shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2)
-{
-    static_assert((is_constructible<_Tp, _A0, _A1, _A2>::value), "Can't construct object in allocate_shared" );
-    typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk;
-    typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2;
-    typedef __allocator_destructor<_Alloc2> _D2;
-    _Alloc2 __alloc2(__a);
-    unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
-    ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
-        _CntrlBlk(__a, __a0, __a1, __a2);
-    shared_ptr<_Tp> __r;
-    __r.__ptr_ = __hold2.get()->get();
-    __r.__cntrl_ = _VSTD::addressof(*__hold2.release());
-    __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
-    return __r;
-}
-
-#endif  // _LIBCPP_HAS_NO_VARIADICS
-
 template<class _Tp>
 shared_ptr<_Tp>::~shared_ptr()
 {