Im not sure there is any scenario where LLWS would/could cause an actual roll. You shouldn't exceed 30 degrees of bank in the pattern but if the wind causes a rolling action it can be corrected for by using opposite aileron and power. If the wind did actually push the low wing down to cause a bank in excess of 90 degrees, it would not be for a continuous change the high wing on the downwind side would be building up a substantial amount of parasite drag and that same wind would stabilize the roll. The scenario could end up 100 different ways given tons of variables. As long as the pilot does not attempt to pull into the turn/wind so drastically as to cause an accelerated stall (high load factor), power added and corrective action is taken with ailerons and rudder coordination the design characteristics of a Cesna 172 are more or focused on stability.