|
Before Vectorization
i = 1
do while (i<=n)
a(i) = b(i) + c(i) ! Original loop code
i = i + 1
end do
After Vectorization
!The vectorizer generates the following two loops
i = 1
do while (i < (n - mod(n,4)))
! Vector strip-mined loop.
a(i:i+3) = b(i:i+3) + c(i:i+3)
i = i + 4
end do
do while (i <= n)
a(i) = b(i) + c(i) !Scalar clean-up loop
i = i + 1
end do |