re PR c++/53524 (Bogus enum comparison warning)

re PR c++/53524 (Bogus enum comparison warning)

	PR c++/53524
gcc/cp/
	* call.c (build_conditional_expr_1): Don't warn about comparison of
	two enumerators before their enumeration is complete.
	(build_new_op_1): Call decay_conversion before warn_logical_operator.
	* decl.c (build_enumerator): Set DECL_CONTEXT of an enumerator to
	its enumeration.
	* decl2.c (mark_used): Call used_types_insert for enums.
	* semantics.c (finish_id_expression): Don't decay CONST_DECL.
	(finish_member_declaration): Don't change DECL_CONTEXT of enumerators.
	* class.c (check_field_decls): Don't change DECL_CONTEXT of enums.
	* typeck.c (convert_for_assignment): Don't decay CONST_DECL.
	(build_class_member_access_expr): Look through unscoped enums.
	* search.c (context_for_name_lookup): Look through unscoped enums.
	* pt.c (tsubst_copy_and_build): Don't decay CONST_DECL.
	(tsubst_copy): Use DECL_CONTEXT to find the enumeration.
	* tree.c (decl_linkage): Likewise.
	* cvt.c (ocp_convert): Check decayed expr for enum range warning.
gcc/c-family/
	* c-common.c (get_priority): Call default_conversion.

From-SVN: r189174