[Bug c++/97976] Optimization relating to NULL pointer assumptions in gcc 9.1

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97976

--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(And for the linux kernel I think it's that the don't want the data flow
analysis done by that option, rather than allowing objects to live at address
zero)