https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110165
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- This will fix the issue: /* (zero_one == 0) ? y : z <op> y -> ((typeof(y))zero_one * z) <op> y */ (for op (bit_xor bit_ior plus) (simplify (cond (eq@3 zero_one_valued_p@0 integer_zerop) @1 (op:c @2 @1)) (if (INTEGRAL_TYPE_P (type) && TYPE_PRECISION (type) > 1 && (INTEGRAL_TYPE_P (TREE_TYPE (@0)))) (op (mult (convert:type @3) @2) @1)))) /* (zero_one != 0) ? z <op> y : y -> ((typeof(y))zero_one * z) <op> y */ (for op (bit_xor bit_ior plus) (simplify (cond (ne@3 zero_one_valued_p@0 integer_zerop) (op:c @2 @1) @1) (if (INTEGRAL_TYPE_P (type) && TYPE_PRECISION (type) > 1 && (INTEGRAL_TYPE_P (TREE_TYPE (@0)))) (op (mult (convert:type @3) @2) @1)))) Though it could be improved better. maybe convert followed by & 1 and still @0 rather than @3. still deciding.