More on adding sized deallocation functions in libc++: Continuing from r229281, this adds version guards and test cases.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@229968 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/new.cpp b/src/new.cpp
index a9b3733..c46d073 100644
--- a/src/new.cpp
+++ b/src/new.cpp
@@ -126,13 +126,6 @@
 
 _LIBCPP_WEAK _LIBCPP_NEW_DELETE_VIS
 void
-operator delete(void* ptr, size_t) _NOEXCEPT
-{
-    ::operator delete(ptr);
-}
-
-_LIBCPP_WEAK _LIBCPP_NEW_DELETE_VIS
-void
 operator delete(void* ptr, const std::nothrow_t&) _NOEXCEPT
 {
     ::operator delete(ptr);
@@ -140,13 +133,20 @@
 
 _LIBCPP_WEAK _LIBCPP_NEW_DELETE_VIS
 void
-operator delete(void* ptr, size_t, const std::nothrow_t&) _NOEXCEPT
+operator delete(void* ptr, size_t) _NOEXCEPT
 {
     ::operator delete(ptr);
 }
 
 _LIBCPP_WEAK _LIBCPP_NEW_DELETE_VIS
 void
+operator delete(void* ptr, size_t, const std::nothrow_t& nt) _NOEXCEPT
+{
+    ::operator delete(ptr, nt);
+}
+
+_LIBCPP_WEAK _LIBCPP_NEW_DELETE_VIS
+void
 operator delete[] (void* ptr) _NOEXCEPT
 {
     ::operator delete(ptr);
@@ -154,13 +154,6 @@
 
 _LIBCPP_WEAK _LIBCPP_NEW_DELETE_VIS
 void
-operator delete[] (void* ptr, size_t) _NOEXCEPT
-{
-    ::operator delete[](ptr);
-}
-
-_LIBCPP_WEAK _LIBCPP_NEW_DELETE_VIS
-void
 operator delete[] (void* ptr, const std::nothrow_t&) _NOEXCEPT
 {
     ::operator delete[](ptr);
@@ -168,11 +161,18 @@
 
 _LIBCPP_WEAK _LIBCPP_NEW_DELETE_VIS
 void
-operator delete[] (void* ptr, size_t, const std::nothrow_t&) _NOEXCEPT
+operator delete[] (void* ptr, size_t) _NOEXCEPT
 {
     ::operator delete[](ptr);
 }
 
+_LIBCPP_WEAK _LIBCPP_NEW_DELETE_VIS
+void
+operator delete[] (void* ptr, size_t, const std::nothrow_t& nt) _NOEXCEPT
+{
+    ::operator delete[](ptr, nt);
+}
+
 #endif // !__GLIBCXX__
 
 namespace std