[Bug sanitizer/81601] [7/8 Regression] incorrect Warray-bounds warning with -fsanitize

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81601

--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think the easiest fix is move optimize_bit_field_compare from where it is
currently done and do it only in some late gimple pass, around
pass_fold_builtins/store merging or so?  Dunno which exact one though.