re PR rtl-optimization/45352 (ICE: in reset_sched_cycles_in_current_ebb, at sel-sched...

re PR rtl-optimization/45352 (ICE: in reset_sched_cycles_in_current_ebb, at sel-sched.c:7058)

	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.

From-SVN: r168164