PR c++/71448
	* fold-const.c (fold_comparison): Handle CONSTANT_CLASS_P (base0)
	the same as DECL_P (base0) for indirect_base0.  Use equality_code
	in one further place.

	* g++.dg/torture/pr71448.C: New test.

Co-Authored-By: Richard Biener <rguenther@suse.de>

From-SVN: r237212