[Bug driver/101103] -fsanitise=undef gives better help than -fsanitize=undef

marxin at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Fri Aug 13 09:40:47 GMT 2021


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101103

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|marxin at gcc dot gnu.org          |unassigned at gcc dot gnu.org
             Status|ASSIGNED                    |NEW

--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Ok, so the reason is following:
- in case of -fsanitise=undef, we don't have an option match as so we search in
all possible options and their values, that's why have a match
- in case of -fsanitize=undef, we first match -fsanitize and then
get_closest_sanitizer_option is called; the function only compares option
values and we don't have a match for 'undefined' as 'undef' does not reach
distance threshold.

It's a limitation, but having low priority to me.


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