bfin.md (UNSPEC_NOP): New constant.

bfin.md (UNSPEC_NOP): New constant.

	* config/bfin/bfin.md (UNSPEC_NOP): New constant.
	(forced_nop): New pattern.
	* config/bfin/bfin.c: Include "df.h".
	(add_to_reg): Use df_regs_ever_live_p instead of regs_ever_live.
	(bfin_discover_loop): Use df_get_live_in instead of
	global_live_at_start.
	(bfin_reorder_loops): Pass 0 to cfg_layout_initialize.  Call
	df_analyze when done.
	(gen_one_bundle): Don't generate SEQUENCE insns, just put modes on
	the insns.  Use QImode for the final insn in a bundle.  Call
	df_insn_rescan on generated NOPs; use gen_forced_nop instead of
	gen_nop.
	(reorder_var_tracking_notes): New function.
	(bfin_reorg): Pass no argument to split_all_insns.  Don't call
	update_life_info.  Call df_analyze after scheduling and bundle
	generation.  Call reorder_var_tracking_notes if generating these notes.
	Call df_finish_pass at the end.

From-SVN: r125648