re PR rtl-optimization/48971 (ICE with -msoft-float -O2)

re PR rtl-optimization/48971 (ICE with -msoft-float -O2)

2011-05-13  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/48971
	* ira.c (setup_pressure_classes): Don't check register move cost
	for classes with one registers.  Don't add pressure class if there
	is a pressure class with the same available hard registers.
	Check contains_reg_of_mode.  Fix a typo in collecting
	temp_hard_regset.  Ignore hard registers not belonging to a class.

From-SVN: r174123