2. The non-transitory computer readable storage media of claim 1 , wherein the method further comprises determining the cost of execution of the program with the conditional expression being moved to a move destination, wherein the cost of execution is based on a number of conditional statements corresponding to the inclusion relation, and a cost to access memory.
2. The non-transitory computer readable storage media of claim 1 , wherein the method further comprises determining the cost of execution of the program with the conditional expression being moved to a move destination, wherein the cost of execution is based on a number of conditional statements corresponding to the inclusion relation, and a cost to access memory. 3. The non-transitory computer readable storage media of claim 2 , wherein determining the cost of execution of the program with the conditional expression moved to the move destination comprises: determining a first provisional cost corresponding to the conditional expression being positive; and determining a second provisional cost corresponding to the conditional expression being negative, wherein the cost is a sum of the first provisional cost and the second provisional cost.