2.8.25 unroll

(SPARC) #pragma unroll (unroll_factor)

This pragma accepts a positive constant integer value for the argument unroll_factor. For unroll factor other than 1, this directive serves as a suggestion to the compiler that the specified loop should be unrolled by the given factor. The compiler will, when possible, use that unroll factor. When the unroll factor value is 1, this directive serves as a command which specifies to the compiler that the loop is not to be unrolled. The compiler takes advantage of this information at optimization level of 3 or above.

The scope of this pragma begins with the pragma and ends with which ever of the following occurs first: the beginning of the next block, the next for loop within the current block, the end of the current block. The pragma applies to the next for loop prior to the end of the pragmas scope.