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Partial Vectorization

Split loops to allow vectorization take place.

Non-vectorizable loop

DO I = 1, N
  A(I) = A(I-1)*X
  B(I) = C(I)**Y
ENDDO

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Non-vectorizable loop

DO I = 1, N
  A(I) = A(I-1)*X
ENDDO

Vectorizable loop

DO I = 1, N
  B(I) = C(I)**Y
ENDDO