[Bug c++/71740] ICE when defining a pointer to the `memcpy()` function with namespace scope using `auto` targeting i686

[lh_mouse at 126 dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71740

--- Comment #1 from lh_mouse <lh_mouse at 126 dot com> ---
Explicitly specifying __cdecl or __attribute__((__cdecl__)) causes an ICE.
Specifying __stdcall or __fastcall, or not specifying one, does not produce an
ICE.