[PATCH] Refactoring FSM bits into their own file
	* tree-ssa-threadedge.c (fsm_find_thread_path): Moved from here into
	tree-ssa-threadbackward.c.
	(fsm_find_control_statement_thread_paths): Likewise.
	(thread_through_normal_block): Break out FSM bits and move them
	into a new function in tree-ssa-threadbackward.c.  Call new function
	instead.
	Minimize header file usage.
	* tree-ssa-threadbackward.h: New file.
	* tree-ssa-threadbackward.c: Likewise.
	* Makefile.in (OBJS): Add tree-ssa-threadbackward.o

From-SVN: r228700