diff options
Diffstat (limited to 'gcc/testsuite/gfortran.dg/negative_stride_1.f90')
| -rw-r--r-- | gcc/testsuite/gfortran.dg/negative_stride_1.f90 | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/negative_stride_1.f90 b/gcc/testsuite/gfortran.dg/negative_stride_1.f90 new file mode 100644 index 00000000000..45da92a223f --- /dev/null +++ b/gcc/testsuite/gfortran.dg/negative_stride_1.f90 @@ -0,0 +1,25 @@ +! { 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 |