http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56966
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2013-04-15
17:34:20 UTC ---
I don't think this is wrong code at all. The warning is correct for the code
as given but wrong for memset in general.
The code looks like:
void set_offset_array(size_t left, size_t right, u_char offset) {
;
;
size_t num_cards = right - left + 1;
memset(&_offset_array[left], offset, num_cards);
}
....
num_cards is being turned into 0 which is fine in this case as optimization has
happened. The problem is the memset code is just bogus when it tries to see if
the length is 0.
