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! { dg-do run }

! PR 48955 - missing array temporary when there was both a forward

! and a backward dependency.

! Test case slightly modified from the original one by Kacper Kowalik.

program ala

   implicit none

   integer, parameter  :: n = 6

   real, dimension(n), parameter :: result = [1.,10.,30.,90.,270., 243.];

   real, dimension(n) :: v0, v1

   character(len=80) :: line1, line2

   v0 = [1.0, 3.0, 9.0, 27.0, 81.0, 243.0]

   v1 = v0

   v1(2:n-1) = v1(1:n-2) + v1(3:n)

   if (any(v1 /= result)) call abort

   v1 = v0

   v1(2:n-1) = v0(1:n-2) + v0(3:n)

   if (any(v1 /= result)) call abort

   v1 = v0

   v1(2:n-1) = v1(3:n) + v1(1:n-2)

   if (any(v1 /= result)) call abort

   v1 = v0

   v1(2:n-1) = v0(3:n) + v0(1:n-2)

   if (any(v1 /= result)) call abort

end program ala