A non-transitory computer-readable recording medium having stored therein a program for causing a computer to execute a process. The process includes storing each of a plurality of generation instructions in a storage area for each of assembly instructions, the generation instructions instructing the generation of instruction sequences of a first instruction set, each instruction sequence of the first instruction set executing a processing equivalent to each assembly instruction of a second instruction set, identifying a first register that is not used by any of the assembly instructions corresponding to the plurality of generation instructions by referring to the storage area, determining a second register of the first instruction set corresponding to the first register as a temporary register in each of the instruction sequences, and generating the instruction sequence that uses the temporary register.