* cp-tree.h (struct lang_type): Remove search_slot.
	(CLASSTYPE_SEARCH_SLOT): Remove.
	(emit_base_init): Change prototype.
	(initialize_vtbl_ptrs): Likewise.
	(expand_indirect_vtbls_init): Likewise.
	(clear_search_slots): Remove.
	* decl.c (lang_mark_tree): Don't mark search_slot.
	* init.c (initialize_vtbl_ptrs): Simplify.
	(emit_base_init): Likewise.
	* search.c (struct vbase_info): Document decl_ptr.
	(convert_pointer_to_single_level): Remove.
	(dfs_find_vbases): Remove.
	(dfs_init_base_pointers): Simplify.
	(dfs_clear_vbase_slots): Remove.
	(dfs_vtable_path_unmark): New function.
	(init_vbase_pointers): Simplify.
	(expand_upcast_fixups): Don't rely on CLASSTYPE_SEARCH_SLOT.
	(expand_indirect_vtbls_init): Simplify.  Don't call
	mark_all_temps_used.
	* semantics.c (setup_vtbl_ptr): Adjust calls to emit_base_init and
	initialize_vtbl_ptrs.

From-SVN: r34067