[Bug c++/127685] [17 Regression] Constant member-function pointer table loads optimized to null since r17-4752

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127685

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Drea Pinski from comment #5)
> > The member-function pointer constructor and the load have distinct
>   FIELD_DECL nodes for __pfn, belonging to equivalent record types.
> 
> I am not sure this should be done. So this might be a c++ FE issue.

I think this is a long-standing C++ FE issue, ISTR running into that before...