Information processing device, storage medium, and method

A non-transitory storage medium storing a program that causes a computer to execute a process, the process comprising:

• dividing loop processing in a program into first loop processing and second loop processing when compiling the program, the loop processing accessing data of an array and prefetching data of the array to be accessed at a repetition processing after prescribed repetition processings at each repetition processing in the loop processing, the first loop processing including one or more repetition processings from an initial repetition processing to a repetition processing immediately before the repetition processing after the prescribed repetition processings, the second loop processing including one or more repetition processings from the repetition processing after the prescribed repetition processings to a last repetition processing;
• and
• generating an intermediate language code based on the program when compiling the program, the intermediate language code being configured to access data of the array by using a first region in a cache memory and prefetch data of the array by using a second region in the cache memory in the first loop processing, and to access and prefetch data of the array by using the second region in the second loop processing.

A method of compiling a program, the method comprising:

• dividing, by a processor, loop processing in the program into first loop processing and second loop processing when compiling the program, the loop processing accessing data of an array and prefetching data of the array to be accessed at a repetition processing after prescribed repetition processings at each repetition processing in the loop processing, the first loop processing including one or more repetition processings from an initial repetition processing to a repetition processing immediately before the repetition processing after the prescribed repetition processings, the second loop processing including one or more repetition processings from the repetition processing after the prescribed repetition processings to a last repetition processing;
• and
• generating, by the processor, an intermediate language code based on the program when compiling the program, the intermediate language code being configured to access data of the array by using a first region in a cache memory and prefetch data of the array by using a second region in the cache memory in the first loop processing, and to access and prefetch data of the array by using the second region in the second loop processing.

A method of controlling a cache by a processor in a computer, the method comprising:

• accessing data of an array in each loop by using a first region in a cache memory and prefetching the data of the array to be accessed in a loop at a prescribed frequency by using a second region of the cache memory in a loop frequency from a first loop to a loop immediately before the loop at the prescribed frequency about loop processing that is included in a program as an execution target;
• and
• using the second region, accessing data of the array in each loop and prefetching data of the array to be accessed in the loop at the prescribed frequency in the loop frequency from the loop at the prescribed frequency to a final loop.