* tree.h (struct typed_tree): New.
(struct tree_common): Include it instead of tree_base.
(TREE_TYPE): Update for new location of type field.
(TYPE_USER_ALIGN, TYPE_PACKED): Refer to base field directly.
(DECL_USER_ALIGN, DECL_PACKED): Likewise.
(union tree_node): Add typed field.
* treestruct.def (TS_TYPED): New.
* lto-streamer.c (check_handled_ts_structures): Handle it.
* tree.c (MARK_TS_TYPED): New macro.
(MARK_TS_COMMON): Call it instead of MARK_TS_BASE.
From-SVN: r172295
