https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88603
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- I think this gives the best code really: uint32_t saturation_add1(uint32_t a, uint32_t b) { uint32_t t; if (__builtin_add_overflow (a, b, &t)) return UINT32_MAX; return t; } That is recognizing: _1 = (long unsigned int) a_4(D); _2 = (long unsigned int) b_5(D); tmp_6 = _1 + _2; if (tmp_6 > 4294967295) As: _6 = .ADD_OVERFLOW (a_4(D), b_5(D)); _2 = IMAGPART_EXPR <_6>; if (_2 != 0)