Vectorization device, vectorization method, and recording medium on which vectorization program is stored

A vectorization method comprising:

• by an information processing apparatus,
• being able to detect, with respect to dual-loop processing included in software, a configuration in which a loop length of an inner loop is a variable value dependent on a value of a loop variable of an outer loop, and in which a first array variable representing a result of the dual-loop processing does not contain a loop variable of the inner loop as an index value;
• when the configuration is detected, determining a fixed value based on predetermined criteria as the loop length of the inner loop;
• expanding an array size of a second array variable used for calculation of a value of the first array variable, and thereby enabling the dual-loop processing to process the inner loop the loop length of which is the fixed value;
• setting an element value to an element of the second array variable newly added by expansion of the array size, and thereby equalizing results of the dual-loop processing before and after determination of the fixed value and expansion of the array size are performed;
• and
• updating the software, based on processing results regarding determination of the fixed value, expansion of the array size, and setting of the element value to an element of the second array variable newly added by expansion of the array size.

A non-transitory computer readable recording medium on which a vectorization program is stored, the vectorization program causing a computer to execute:

• detection processing capable of detecting, with respect to dual-loop processing included in software, a configuration in which a loop length of an inner loop is a variable value dependent on a value of a loop variable of an outer loop, and in which a first array variable representing a result of the dual-loop processing does not contain a loop variable of the inner loop as an index value;
• fixed value determination processing of, when the detection processing detects the configuration, determining a fixed value based on predetermined criteria as the loop length of the inner loop;
• expansion processing of expanding an array size of a second array variable used for calculation of a value of the first array variable, and thereby enabling the dual-loop processing to process the inner loop the loop length of which is the fixed value;
• expansion element setting processing of setting an element value to an element of the second array variable newly added by the expansion processing, and thereby equalizing results of the dual-loop processing before and after processing by the fixed value determination processing and the expansion processing is performed;
• and
• update processing of updating the software, based on processing results by the fixed value determination processing, the expansion processing, and the expansion element setting processing.