https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91027
--- Comment #8 from ibuclaw at gcc dot gnu.org ---
(In reply to Jan Hubicka from comment #3)
> Hi,
> this patch triggers another confusion in ipa-devirt.
> It tries to build type inheritnace graph but since D frotnend produces
> only functions with DECL_VIRTUAL but no BINFOs and other things it
> segfaults eventually.
>
> Working around it makes it to work. So this adds new question why D
> frontend needs to set DECL_VIRTUAL?
>
BINFO to represent the class inheritance chain is generated by the D frontend,
but nothing else is included.
DECL_VIRTUAL_P is set on vtblZ global symbols, the __vptr field of class
objects, and all virtual functions, as is documented in tree.h.
There's the ability to bind to extern(C++) in the language (i.e: extern(C++)
class CPPclass { }), so I think in general, the D front-end should be
generating trees that have equivalence to the C++ front-end. If there's
information missing, I think that should be included to not trip up LTO.
