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program subarrays
integer, parameter :: n = 20, c = 10, low = 5, high = 10
integer :: i, a(n), b(n)
a(:) = 0
b(:) = 0
! COPY
!$acc parallel copy (a(low:high))
!$acc loop
do i = low, high
a(i) = i
end do
!$acc end parallel
do i = low, high
b(i) = i
end do
call check (a, b, n)
! COPYOUT
a(:) = 0
!$acc parallel copyout (a(low:high))
!$acc loop
do i = low, high
a(i) = i
end do
!$acc end parallel
do i = low, high
if (a(i) .ne. b(i)) call abort
end do
call check (a, b, n)
! COPYIN
a(:) = 0
!$acc parallel copyout (a(low:high)) copyin (b(low:high))
!$acc loop
do i = low, high
a(i) = b(i)
end do
!$acc end parallel
call check (a, b, n)
! PRESENT_OR_COPY
a(:) = 0
!$acc parallel pcopy (a(low:high))
!$acc loop
do i = low, high
a(i) = i
end do
!$acc end parallel
call check (a, b, n)
! PRESENT_OR_COPYOUT
a(:) = 0
!$acc parallel pcopyout (a(low:high))
!$acc loop
do i = low, high
a(i) = i
end do
!$acc end parallel
call check (a, b, n)
! PRESENT_OR_COPYIN
a(:) = 0
!$acc parallel pcopyout (a(low:high)) &
!$acc & pcopyin (b(low:high))
!$acc loop
do i = low, high
a(i) = b(i)
end do
!$acc end parallel
call check (a, b, n)
end program subarrays
subroutine check (a, b, n)
integer :: n, a(n), b(n)
integer :: i
do i = 1, n
if (a(i) .ne. b(i)) call abort
end do
end subroutine check
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