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! { dg-do run }

!

! PR fortran/51218

!

! Contributed by Harald Anlauf

!

module a

  implicit none

  integer :: neval = 0

contains

  subroutine inc_eval

    neval = neval + 1

  end subroutine inc_eval

end module a

module b

  use a

  implicit none

contains

  function f(x) ! Should be implicit pure

    real :: f

    real, intent(in) :: x

    f = x

  end function f

  function g(x) ! Should NOT be implicit pure

    real :: g

    real, intent(in) :: x

    call inc_eval

    g = x

  end function g

end module b

program gfcbug114a

  use a

  use b

  implicit none

  real :: x = 1, y = 1, t, u, v, w

  if (neval /= 0) call abort ()

  t = f(x)*f(y)

  if (neval /= 0) call abort ()

  u = f(x)*f(y) + f(x)*f(y)

  if (neval /= 0) call abort ()

  v = g(x)*g(y)

  if (neval /= 2) call abort ()

  w = g(x)*g(y) + g(x)*g(y)

  if (neval /= 6) call abort ()

  if (t /= 1.0 .or. u /= 2.0 .or. v /= 1.0 .or. w /= 2) call abort ()

end program gfcbug114a

! { dg-final { scan-module "b" "IMPLICIT_PURE" } }

! { dg-final { cleanup-modules "b" } }