PR debug/48466
	* dwarf2out.c (based_loc_descr): If drap_reg is INVALID_REGNUM, use
	as base_reg whatever register reg has been eliminated to, instead
	of hardcoding STACK_POINTER_REGNUM.

	* gcc.dg/guality/pr36977.c: New test.
	* gcc.dg/guality/pr48466.c: New test.

From-SVN: r172039