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! { dg-do run }

! { dg-options "-fcheck=recursion" }

!

! PR fortran/39577

!

! Recursive but valid program

! Contributed by Dominique Dhumieres

!

recursive function fac(i) result (res)

  integer :: i, j, k, res

  k = 1

  goto 100

entry bifac(i,j) result (res)

  k = j

100 continue

  if (i < k) then

    res = 1

  else

    res = i * bifac(i-k,k)

  end if

end function

program test

interface

  recursive function fac(n) result (res)

    integer :: res

    integer :: n

  end function fac

  recursive function bifac(m,n) result (res)

    integer :: m, n, res

  end function  bifac

end interface

  print *, fac(5)

  print *, bifac(5,2)

  print*, fac(6)

  print *, bifac(6,2)

  print*, fac(0)

  print *, bifac(1,2)

end program test