[Bug c/109542] bad detection of null dereferance cause ud2a in valid inline function code

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109542

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
You can either perform the arithmetic using intptr_t or uintptr_t, or use
-fdelete-null-pointer-checks (as the documentation for that option explains).

Also I would expect a volatile char* to be used for such accesses.