https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67830
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
CC| |law at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
_7 = (int) _5;
_10 = (int) d.2_9;
f_11 = _10 - _7;
_12 = f_11 & -2;
with _5 and d.2_9 being of type unsigned char is transformed to
_15 = d.2_9 - _5;
_16 = _15 & 254;
_12 = (int) _16;
with _16 being unsigned char. That looks wrong as it changes a
sign-extended subtraction result to a zero-extended one.
CCing Jeff who added that pattern.
