re PR debug/64935 (compare debug failure during building of Linux kernel)

re PR debug/64935 (compare debug failure during building of Linux kernel)

Fix PR64935

	* haifa-sched.c (enum rfs_decision, rfs_str): Remove RFS_DEBUG.
	(rank_for_schedule_debug): Update.
	(ready_sort): Make static.  Move sorting logic to ...
	(ready_sort_debug, ready_sort_real): New static functions.
	(schedule_block): Sort both debug insns and real insns in preparation
	for ready list trimming.  Improve debug output.
	* sched-int.h (ready_sort): Remove global declaration.

	* gcc.dg/pr64935-1.c, gcc.dg/pr64935-2.c: New tests.

From-SVN: r220808