[Bug fortran/56800] New: [fortran-dev Regression] move_alloc_13.f90 failure

[tkoenig at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56800

             Bug #: 56800
           Summary: [fortran-dev Regression] move_alloc_13.f90 failure
    Classification: Unclassified
           Product: gcc
           Version: fortran-dev
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: tkoenig@gcc.gnu.org


The move_alloc_13 failure on the fortran-dev branch can be reduced
to a wrong setting of sm to zero in:

ig25@linux-fd1f:~/Krempel/Branch> cat mv.f90
type t
end type t
type, extends(t) :: t2
  integer :: a
end type t2

class(t), allocatable :: y(:), z(:)

allocate(y(1), source=[t2(2)])

end
ig25@linux-fd1f:~/Krempel/Branch> gfortran -fdump-tree-original mv.f90

[...]

        __builtin_memset (y._data.base_addr, 0, 4);
        y._data.dtype = 41;
        y._data.dim[0].lower_bound = 1;
        y._data.dim[0].extent = 2 - y._data.dim[0].lower_bound;
        y._data.dim[0].sm = 0;
        y._data.offset = -1;