[Bug sanitizer/71962] error: ‘((& x) != 0u)’ is not a constant expression

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71962

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Maybe the sanitizers could use sth not visible to the middle-end for null
pointer tests, like a new IFN?