[Bug tree-optimization/68853] [6 Regression] gcc-6 miscompiles Chromium v8 garbage collector

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68853

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Calling a NULL object is undefined.  


  Address address() { return reinterpret_cast<Address>(this); }

  bool is_valid() { return address() !=
# 475 "../../v8/src/heap/spaces.h" 3 4
                                       __null
# 475 "../../v8/src/heap/spaces.h"
                                           ; }


That will always be true.  That is this can never be NULL.