1! Like array_constructor_6.f90, but check iterators with non-default stride, 2! including combinations which lead to zero-length vectors. 3! { dg-do run } 4! { dg-options "-Wzerotrip" } 5program main 6 implicit none 7 call build (77) 8contains 9 subroutine build (order) 10 integer :: order, i, j 11 12 call test (1, 11, 3, (/ (i, i = 1, 11, 3) /)) 13 call test (3, 20, 2, (/ (i, i = 3, 20, 2) /)) 14 call test (4, 0, 11, (/ (i, i = 4, 0, 11) /)) ! { dg-warning "will be executed zero times" } 15 16 call test (110, 10, -3, (/ (i, i = 110, 10, -3) /)) 17 call test (200, 20, -12, (/ (i, i = 200, 20, -12) /)) 18 call test (29, 30, -6, (/ (i, i = 29, 30, -6) /)) ! { dg-warning "will be executed zero times" } 19 20 call test (1, order, 3, (/ (i, i = 1, order, 3) /)) 21 call test (order, 1, -3, (/ (i, i = order, 1, -3) /)) 22 23 ! Triggers compile-time iterator calculations in trans-array.c 24 call test (1, 1000, 2, (/ (i, i = 1, 1000, 2), (i, i = order, 0, 1) /)) 25 call test (1, 0, 3, (/ (i, i = 1, 0, 3), (i, i = order, 0, 1) /)) ! { dg-warning "will be executed zero times" } 26 call test (1, 2000, -5, (/ (i, i = 1, 2000, -5), (i, i = order, 0, 1) /)) ! { dg-warning "will be executed zero times" } 27 call test (3000, 99, 4, (/ (i, i = 3000, 99, 4), (i, i = order, 0, 1) /)) ! { dg-warning "will be executed zero times" } 28 call test (400, 77, -39, (/ (i, i = 400, 77, -39), (i, i = order, 0, 1) /)) 29 30 do j = -10, 10 31 call test (order + j, order, 5, (/ (i, i = order + j, order, 5) /)) 32 call test (order + j, order, -5, (/ (i, i = order + j, order, -5) /)) 33 end do 34 35 end subroutine build 36 37 subroutine test (from, to, step, values) 38 integer, dimension (:) :: values 39 integer :: from, to, step, last, i 40 41 last = 0 42 do i = from, to, step 43 last = last + 1 44 if (values (last) .ne. i) call abort 45 end do 46 if (size (values, dim = 1) .ne. last) call abort 47 end subroutine test 48end program main 49