[Bug c++/61020] [4.9/4.10 Regression] typeid(typeid(X)) produces 'ud2'

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61020

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
  _ZTI7Derived.0_1 = &_ZTI7Derived;
  _3 = MEM[(const struct type_info *)_ZTI7Derived.0_1]._vptr.type_info;
  _4 = _3 + 18446744073709551608;
  _5 = *_4;

Is being optimized to be 0 for some reason.

Looks like _ZTVN10__cxxabiv120__si_class_type_infoE (vtable for
__cxxabiv1::__si_class_type_info) is not being recorded correctly inside GCC.