[Bug tree-optimization/101758] Inconsistent optimizations with UBSan

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101758

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
UBSAN_NULL doesn't check just whether it is non-NULL, but also the alignment.
So no, this doesn't look like the right fix.