gcc/testsuite/gfortran.dg/dependency_40.f90

   1 ! { dg-do run }
   2 ! PR 48955 - missing array temporary when there was both a forward
   3 ! and a backward dependency.
   4 ! Test case slightly modified from the original one by Kacper Kowalik.
   5 program ala
   6    implicit none
   7
   8    integer, parameter  :: n = 6
   9    real, dimension(n), parameter :: result = [1.,10.,30.,90.,270., 243.];
  10    real, dimension(n) :: v0, v1
  11    character(len=80) :: line1, line2
  12
  13    v0 = [1.0, 3.0, 9.0, 27.0, 81.0, 243.0]
  14    v1 = v0
  15
  16    v1(2:n-1) = v1(1:n-2) + v1(3:n)
  17    if (any(v1 /= result)) STOP 1
  18    v1 = v0
  19    v1(2:n-1) = v0(1:n-2) + v0(3:n)
  20    if (any(v1 /= result)) STOP 2
  21
  22    v1 = v0
  23    v1(2:n-1) = v1(3:n) + v1(1:n-2)
  24    if (any(v1 /= result)) STOP 3
  25    v1 = v0
  26    v1(2:n-1) = v0(3:n) + v0(1:n-2)
  27    if (any(v1 /= result)) STOP 4
  28
  29 end program ala