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! { dg-do run }
module e_50_4_mod
contains
subroutine init (v1, v2, N)
integer :: i, N
real, pointer, dimension(:) :: v1, v2
do i = 1, N
v1(i) = i + 2.0
v2(i) = i - 3.0
end do
end subroutine
subroutine check (p, N)
integer :: i, N
real, parameter :: EPS = 0.00001
real, pointer, dimension(:) :: p
do i = 1, N
diff = p(i) - (i + 2.0) * (i - 3.0)
if (diff > EPS .or. -diff > EPS) stop 1
end do
end subroutine
subroutine vec_mult_1 (p, v1, v2, N)
integer :: i, N
real, pointer, dimension(:) :: p, v1, v2
!$omp target map(to: v1(1:N), v2(:N)) map(from: p(1:N))
!$omp parallel do
do i = 1, N
p(i) = v1(i) * v2(i)
end do
!$omp end target
end subroutine
subroutine vec_mult_2 (p, v1, v2, N)
real, dimension(*) :: p, v1, v2
integer :: i, N
!$omp target map(to: v1(1:N), v2(:N)) map(from: p(1:N))
!$omp parallel do
do i = 1, N
p(i) = v1(i) * v2(i)
end do
!$omp end target
end subroutine
end module
program e_50_4
use e_50_4_mod, only : init, check, vec_mult_1, vec_mult_2
real, pointer, dimension(:) :: p1, p2, v1, v2
integer :: n
n = 1000
allocate (p1(n), p2(n), v1(n), v2(n))
call init (v1, v2, n)
call vec_mult_1 (p1, v1, v2, n)
call vec_mult_2 (p2, v1, v2, n)
call check (p1, N)
call check (p2, N)
deallocate (p1, p2, v1, v2)
end program
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