[Bug sanitizer/81148] UBSAN: two more false positives

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81148

--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
It's the
(flag_sanitize & SANITIZE_SI_OVERFLOW) == 0
check in fold_negate_expr_1 that makes the difference w/ and w/o ubsan.