[Bug debug/48459] [4.6/4.7 Regression] avr: Assertion failure with -gdwarf-2

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48459

--- Comment #11 from Jason Merrill <jason at gcc dot gnu.org> 2011-06-10 16:24:12 UTC ---
(In reply to comment #10)
> I don't think  initial_return_save() is called now. It passes the compilation
> there but gets struck in other places. I think it is because
> INCOMING_RETURN_ADDR_RTX is now seen as defined and hence CFI info is emitted.
> But this runs into trouble because the above hook is gcc_unreachable().

It's only defined in dwarf2out.c, and there it's only used in the call to
initial_return_save.