trans.h (struct gfc_ss, [...]): Move shape field from the former struct to the latter.
* trans.h (struct gfc_ss, struct gfc_array_info): Move shape field
from the former struct to the latter.
* trans-array.c (gfc_conv_ss_startstride, gfc_conv_loop_setup):
Update field references.
* trans-expr.c (gfc_trans_subarray_assign): Update field references
and factor common reference chains.
* trans-io.c (transfer_array_component): Ditto.