PR rtl-optimization/45352

	PR rtl-optimization/46521
	PR rtl-optimization/46522
	* sel-sched.c (reset_sched_cycles_in_current_ebb): Recheck the DFA state
	on the last iteration of the advancing loop.
	(sel_sched_region_1): Propagate the rescheduling bit to the next block
	also for empty blocks.

	* gcc.dg/pr46521.c: New.
	* gcc.dg/pr46522.c: New. 


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@168164 138bc75d-0d04-0410-961f-82ee72b054a4