* call.c (build_special_member_call): Do not try to lookup VTTs by
	name.
	* class.c (vtbl_init_data): Add generate_vcall_entries.
	(get_vtable_decl): Do not look up virtual tables by name.
	(copy_virtuals): Do not use BV_USE_VCALL_INDEX_P.
	(set_primary_base): Do not set CLASSTYPE_RTTI.
	(determine_primary_base): Likewise.
	(get_matching_virtual): Remove.
	(get_vcall_index): New function.
	(update_vtable_entry_for_fn): Do not try to use virtual thunks
	when they are not required.  Assign vcall indices at this point.
	(finish_struct_1): Do not set CLASSTYPE_NEEDS_VIRTUAL_REINIT.
	Do update dynamic_classes.
	(build_vtt): Do not add VTTs to the symbol table.
	(build_ctor_vtbl_group): Likewise.
	(build_vtbl_initializer): Simplify handling of vcall indices.
	(build_vcall_offset_vtbl_entries): Pretend to build vcall offsets
	for the most derived class.
	(add_vcall_offset_vtbl_entries_1): But do not actually add them to
	the vtable.
	* cp-tree.h (dynamic_classes): New macro.
	(lang_type_class): Remove rtti.  Add vtables.  Add vcall_indices.
	(CLASSTYPE_RTTI): Remove.
	(CLASSTYPE_NEEDS_VIRTUAL_REINIT): Remove.
	(CLASSTYPE_VCALL_INDICES): New macro.
	(CLASSTYPE_VTABLES): Likewise.
	(BV_USE_VCALL_INDEX_P): Remove.
	(build_vtable_path): Remove.
	* decl2.c (finish_vtable_vardecl): Remove.
	(key_method): Remove #if 0'd code.
	(finish_vtable_vardecl): Rename to ...
	(maybe_emit_vtables): ... this.
	(finish_file): Use it.
	* search.c (look_for_overrides_here): Update comment.

	* g++.dg/abi/thunk1.C: New test.
	* g++.dg/abi/thunk2.C: Likewise.
	* g++.dg/abi/vtt1.C: Likewise.

From-SVN: r58779