* tree-ssa-threadbackward.c (fsm_find_thread_path): Remove unneeded
	parameter.  Callers changed.
	(check-subpath_and_update_thread_path): Extracted from
	fsm_find_control_statement_thread_paths.
	(handle_phi, handle_assignment, handle_assignment_p): Likewise.
	(handle_phi, handle_assignment): Allow any constant node, not
	just INTEGER_CST.

From-SVN: r242431