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! Program to test elemental functions.

program test_elemental

   implicit none

   integer, dimension (2, 4) :: a

   integer, dimension (2, 4) :: b

   integer(kind = 8), dimension(2) :: c

   a = reshape ((/2, 3, 4, 5, 6, 7, 8, 9/), (/2, 4/))

   b = 0

   b(2, :) = e_fn (a(1, :), 1)

   if (any (b .ne. reshape ((/0, 1, 0, 3, 0, 5, 0, 7/), (/2, 4/)))) call abort

   a = e_fn (a(:, 4:1:-1), 1 + b)

   if (any (a .ne. reshape ((/7, 7, 5, 3, 3, -1, 1, -5/), (/2, 4/)))) call abort

   ! This tests intrinsic elemental conversion functions.

   c = 2 * a(1, 1)

   if (any (c .ne. 14)) call abort

   ! This triggered bug due to building ss chains in the wrong order.

   b = 0;

   a = a - e_fn (a, b)

   if (any (a .ne. 0)) call abort

   ! Check expressions involving constants

   a = e_fn (b + 1, 1)

   if (any (a .ne. 0)) call abort

contains

elemental integer(kind=4) function e_fn (p, q)

   integer, intent(in) :: p, q

   e_fn = p - q

end function

end program