libgomp/testsuite/libgomp.oacc-fortran/kernels-loop-data-update.f95

   1 ! { dg-do run }
   2
   3 program main
   4   implicit none
   5   integer, parameter         :: n = 1024
   6   integer, dimension (0:n-1) :: a, b, c
   7   integer                    :: i, ii
   8
   9   !$acc enter data create (a(0:n-1), b(0:n-1), c(0:n-1))
  10
  11   !$acc kernels present (a(0:n-1))
  12   do i = 0, n - 1
  13      a(i) = i * 2
  14   end do
  15   !$acc end kernels
  16
  17   do i = 0, n -1
  18      b(i) = i * 4
  19   end do
  20
  21   !$acc update device (b(0:n-1))
  22
  23   !$acc kernels present (a(0:n-1), b(0:n-1), c(0:n-1))
  24   do ii = 0, n - 1
  25      c(ii) = a(ii) + b(ii)
  26   end do
  27   !$acc end kernels
  28
  29   !$acc exit data copyout (a(0:n-1), c(0:n-1))
  30
  31   do i = 0, n - 1
  32      if (c(i) .ne. a(i) + b(i)) STOP 1
  33   end do
  34
  35 end program main