* cp-tree.h (DECL_CONSTRUCTOR_P, DECL_MAYBE_IN_CHARGE_CONSTRUCTOR,
	DECL_DESTRUCTOR_P, DECL_MAYBE_IN_CHARGE_DESTRCTOR): Look at
	identifier flags.
	* decl.c (grokfndecl): Set DECL_CXX_CONSTRUCTOR and
	DECL_CXX_DESTRUCTOR explicitly.
	* decl2.c (grokclassfn): Likewise.
	* friend.c (do_friend): Likewise.
	* method.c (make_thunk, make_alias_for,
	implicitly_declare_fn): Likewise.

From-SVN: r250158