method.c (implicitly_declare_fn): Don't call defer_fn; abort if it might be needed.
* method.c (implicitly_declare_fn): Don't call defer_fn; abort
if it might be needed.
* pt.c (mark_decl_instantiated): Only call defer_fn if
the function actually needs processing in finish_file.
* decl2.c (finish_file): Add check that elements in
deferred_fns_used are really needed there. Remove unnecessary
test of DECL_SAVED_TREE.