The tracing subscript method of vectorization with array element as node offers different means of operating upon array elements

such as exchange

jump

drift

del-etion and fill. Compared with various methods of taking statement or array item as operated object

it not only strengthens the ability greatly to recognize vector-based parallelism

but also creates conditions for applying modern math tools to a larger area The comparison decisions about vectorism the paper has proved make it possible for a great number of loops to recognize whether they are vectorizable through simple math process only

thereby abandoning lengthy calculations in constructing statement graphs

or array-item graphs

or sequential hieranchies

with statements

or subscript variables

or array elements as nodes nespectively

This kind of decision method of vector-based parallelism is readily extended to other parallel modes.