Make std::forward and std::move (and std::move_if_noexcept) constexpr in C++14

llvm-svn: 186344
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 1c682f0f0c5bd24c8886894daf87cba1b37645e4
diff --git a/include/tuple b/include/tuple
index d8a36e6..c7a1c14 100644
--- a/include/tuple
+++ b/include/tuple
@@ -843,7 +843,7 @@
 inline _LIBCPP_INLINE_VISIBILITY
 constexpr _T1&& get(tuple<_Args...>&& __tup) noexcept
 {
-    return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(_VSTD::move<tuple<_Args...>>(__tup));
+    return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(_VSTD::move(__tup));
 }
 
 #endif