(sparc_frw_compute_frame_size): New function, for flat
register window model support.
(sparc_frw_save_restore): Likewise.
(sparc_frw_output_function_prologue): Likewise.
(sparc_frw_output_function_epilogue): Likewise.
(sparc_frw_epilogue_delay_slots): Likewise.
(sparc_frw_eligible_for_epilogue_delay): Likewise.

From-SVN: r1275