gcc/

2010-05-10  H.J. Lu<hongjiu.lu@intel.com>
	    Vladimir Makarov<vmakarov@redhat.com>

	PR rtl-optimization/44012
	* ira-build.c (remove_unnecessary_allocnos): Nullify
	regno_allocno_map of the removed allocno.

gcc/testsuite/

2010-05-10  H.J. Lu  <hongjiu.lu@intel.com>

	PR rtl-optimization/44012
	* gcc.dg/pr44012.c: New.

From-SVN: r159223