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

[ppalka at gcc dot gnu.org]

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

--- Comment #6 from Patrick Palka <ppalka at gcc dot gnu.org> ---
(In reply to Patrick Palka from comment #5)
> So what's the right way to fix this?  To move optimize_bit_field_compare()
> from fold_binary to match.pd so that the conditions on

... so that conditions on tp->chrono_type get consistently transformed into
BIT_FIELD_REFs, or to remove optimize_bit_field_compare() altogether?  It seems
like a rather low-level optimization to be done in GENERIC/GIMPLE.