[Bug c/80097] internal compiler error in c_fully_fold_internal with std=c89 and -fsanitize=float-divide-by-zero

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80097

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.