re PR rtl-optimization/50026 (Revision 177575 caused many test failures)

2011-08-09  Vladimir Makarov  <vmakarov@redhat.com>

	PR target/50026
	Revert:
	PR rtl-optimization/49990
	* ira-costs.c (print_allocno_costs, print_pseudo_costs): Don't
	ignore classes which can not change mode.
	(find_costs_and_classes): Ditto.

From-SVN: r177599