[Bug c/125072] wrong code generated with counted_by on pointer + ubsan

[uecker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125072

--- Comment #5 from uecker at gcc dot gnu.org ---
PATCH: https://gcc.gnu.org/pipermail/gcc-patches/2026-June/719397.html