2012-03-16  Richard Guenther  <rguenther@suse.de>

	* fold-const.c (native_interpret_expr): Also support POINTER_TYPE
	and REFERENCE_TYPE interpretations.
	(can_native_interpret_type_p): New function.
	(fold_ternary_loc): Use native encode/interpret to fold
	BIT_FIELD_REFs of constants.

From-SVN: r185469