PR rtl-optimization/57268
	* sched-deps.c (sched_analyze_2): Don't flush_pedning_lists
	if DEBUG_INSN_P (insn).

	Reapply
	2013-05-31  Dinar Temirbulatov  <dinar@kugelworks.com>

	PR rtl-optimization/57268
	* sched-deps.c (sched_analyze_2): Flush dependence lists if
	the sum of the read and write lists exceeds MAX_PENDING_LIST_LENGTH.

From-SVN: r199615