However, some of the forms are discussed only in Section 4 . Advice to users. Consider a dimension of the alignee for which a colon appears as an align-source and let the lower and upper bounds of that dimension be LA and UA . Each dummy variable is considered to range over all valid index values for the corresponding dimension of the alignee . Every combination of possible values for the index variables selects an element of the alignee .
Replication allows an optimizing compiler to arrange to read whichever copy is closest.
Replicated representations are very useful for small lookup tables, where it is much faster to have a copy in each phsical processor but without giving it an extra dimension that is logically unnecessary to the algorithm. The resulting subscript values must be legitimate subscripts for the align-target .