| ! { dg-do run } |
| ! |
| ! PR fortran/102043 |
| ! The middle-end used to conclude from array indexing that the index |
| ! should be non-negative and thus that array accesses to reversed arrays |
| ! (i.e. with negative strides) only access the last element of the array, |
| ! as the access involves a pointer to array that is initialized to point |
| ! to the last element in the case of a reversed array. |
| |
| program main |
| implicit none |
| integer :: a(3, 3) |
| integer :: i |
| a = 0 |
| call s(a(3:1:-1,:)) |
| if (any(a(:,1) /= (/ 7, 5, 3 /))) stop 1 |
| if (any(a(:,2) /= (/ 17, 13, 11 /))) stop 2 |
| if (any(a(:,3) /= (/ 29, 23, 19 /))) stop 3 |
| contains |
| subroutine s(b) |
| implicit none |
| integer, dimension(:,:) :: b |
| b = reshape((/ 3, 5, 7, 11, 13, 17, 19, 23, 29 /), (/ 3, 3 /)) |
| end subroutine s |
| end program main |
