gcc/testsuite/gfortran.dg/simplify_cshift_1.f90

   1 ! { dg-do run }
   2 program foo
   3
   4    implicit none
   5
   6    type t
   7       integer i
   8    end type t
   9
  10    type(t), parameter :: d(5) = [t(1), t(2), t(3), t(4), t(5)]
  11    type(t) e(5), q(5)
  12
  13    integer, parameter :: a(5) = [1, 2, 3, 4, 5]
  14    integer i, b(5), c(5), v(5)
  15
  16    c = [1, 2, 3, 4, 5]
  17
  18    b = cshift(a, -2)
  19    v = cshift(c, -2)
  20    if (any(b /= v)) STOP 1
  21
  22    b = cshift(a, 2)
  23    v = cshift(c, 2)
  24    if (any(b /= v)) STOP 2
  25
  26    ! Special cases shift = 0, size(a), -size(a)
  27    b = cshift([1, 2, 3, 4, 5], 0)
  28    if (any(b /= a)) STOP 3
  29    b = cshift([1, 2, 3, 4, 5], size(a))
  30    if (any(b /= a)) STOP 4
  31    b = cshift([1, 2, 3, 4, 5], -size(a))
  32    if (any(b /= a)) STOP 5
  33
  34    ! simplification of array arg.
  35    b = cshift(2 * a, 0)
  36    if (any(b /= 2 * a)) STOP 6
  37
  38    ! An array of derived types works too.
  39    e = [t(1), t(2), t(3), t(4), t(5)]
  40    e = cshift(e, 3)
  41    q = cshift(d, 3)
  42    do i = 1, 5
  43       if (e(i)%i /= q(i)%i) STOP 7
  44    end do
  45
  46 end program foo