[Bug debug/54534] [4.7 Regression] Missing location for unused variable

[hubicka at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54534

--- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> 2012-09-11 10:19:04 UTC ---
Well, the patch really is quite symptomatic - i.e. dwarf2out should not forget
about the decl when it is removed from varpool.

The way things are supposed to work (I believe) is to call global_decl debug
hook via emit_debug_global_declarations that is called from frontend at global
decl wrapup time (i.e. the thing that is executed after whole compilation and
should not be frontend specific :)

I made some cleanups in this area as part of symtab work, but I do not see how
those should affect the debug output...