向量化中数据依赖关系的强化

THE INTENSIFICATION OF DATA DEPENDENCE IN VECTORIZATION

本文以数组项为结点的循环向量化分析方法,对“如果一个语句的所有结点(数组的每次出现)都不在递归回路中,则这个语句就能写成向量形式”的论点提出了反面例证,并通过对数据依赖关系进行强化的方法对循环体的部分向量化问题做了重新论述。

For the analysis approach to vectorization with array as analysis unit, a counter example is put forward against the former argument which holds that a statement can be vectorized if none of its array occurrences appears in a return circuit. By intensifying the data dependence, the problem of partial vectorization of DO loops is further discussed.