[Bug c++/94590] Incorrectly accepts invalid C++11 braced initialisation of double from long double if sizeof(long double)==sizeof(double)

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94590

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This is because in check_narrowing we have:

1011   else if (TREE_CODE (ftype) == REAL_TYPE
1012            && TREE_CODE (type) == REAL_TYPE)
1013     {
1014       if (TYPE_PRECISION (type) < TYPE_PRECISION (ftype))
...
1027             ok = false;

but with -mlong-double-64 both type and ftype's precision is 64.