re PR fortran/42169 (gfortran.dg/pr41928.f90:47: internal compiler error: in store_can_be_removed_p, at ira-emit.c:371)

2010-10-20  Vladimir Makarov  <vmakarov@redhat.com>

	PR fortran/42169
	* ira-emit.c (store_can_be_removed_p): Return false instead of
	gcc_unreachable.

From-SVN: r165722