* cp-tree.h (BV_USE_VCALL_INDEX_P): New macro.
(BV_GENERATE_THUNK_WITH_VTABLE_P): Likewise.
(lang_decl_flags): Add generate_with_vtable_p. Make vcall_offset
a tree, not an int.
(THUNK_GENERATE_WITH_VTABLE_P): New macro.
(make_thunk): Change prototype.
(emit_thunk): Rename to use_thunk.
(mangle_thunk): Change prototype.
* class.c (get_derived_offset): Simplify.
(copy_virtuals): Clear BV_USE_VCALL_INDEX_P and
BV_GENERATE_THUNK_WITH_VTABLE_P.
(build_primary_vtable): Simplify.
(add_virtual_function): Use BV_FN, rather than TREE_VALUE.
(dfs_find_base): Remove.
(update_vtable_entry_for_fn): Correct bug in finding the base
where a virtual function was first declared. Figure out whether
or not to emit a vcall-thunk with the vtables in which it appears.
Correct logic for deciding whether to use an ordinary thunk, or a
vcall thunk.
(finish_struct_1): Remove unnecssary code.
(build_vtbl_initializer): Use ssize_int for the running counter of
negative indices.
(build_vtbl_initializer): Only use vcall thunks where necessary.
Mark thunks as needing to be emitted with their vtables, or not.
(build_vbase_offset_vtbl_entries): Adjust for use of ssize_int in
indices. Use size_binop.
(dfs_build_vcall_offset_vtbl_entries): Don't rely on
BINFO_PRIMARY_MARKED_P here. Use BV_FN consistently. Use
size_binop.
(build_rtti_vtbl_entries): Adjust call to build_vtable_entry.
(build_vtable_entry): Mark thunks as needing to be emitted with
their vtables, or not.
* decl.c (lang_mark_tree): Mark the vcall_offset in a thunk.
* decl2.c (mark_vtable_entries): Use use_thunk instead of
emit_thunk.
* dump.c (dequeue_and_dump): Remove dead code. Dump new thunk
information.
* error.c (dump_expr): Use BV_FN.
* mangle.c (mangle_thunk): Adjust now that vcall_offset is a tree,
not an int.
* method.c (make_thunk): Likewise.
(emit_thunk): Rename to use_thunk. Allow callers to decide
whether or not to actually emit the thunk. Adjust for changes in
representation of vcall offsets.
* search.c (dfs_get_pure_virtuals): Use BV_FN.
* semantics.c (emit_associated_thunks): New function.
(expand_body): Use it.
* ir.texi: Adjust decriptions of thunks.
From-SVN: r34656
