Fix goto checking.
* cp-tree.h (struct language_function): x_named_labels is now
a struct named_label_list*.
* decl.c (struct named_label_use_list): Renamed from...
(struct named_label_list): ...this. New struct.
(push_binding_level): Don't set eh_region.
(note_level_for_eh): New fn.
(pop_label): Take label and old value directly.
(pop_labels): Adjust for new named_labels format.
(lookup_label): Likewise.
(poplevel): Note characteristics of a binding level containing a
named label. Mess with named label lists earlier.
(mark_named_label_lists): New fn.
(mark_lang_function): Call it.
(use_label): New fn, split out from...
(make_label_decl): ...here. Don't call it.
(decl_jump_unsafe, check_previous_goto, check_previous_goto_1,
check_previous_gotos): New fns, split out from...
(define_label): ...here.
(check_switch_goto): New fn.
(define_case_label): Call it.
(check_goto): New fn.
* semantics.c (finish_goto_stmt): Call it and use_label.
(begin_compound_stmt): If we're a try block, call note_level_for_eh.
(expand_stmt): Never pass 1 as DONT_JUMP_IN to expand_end_bindings.
From-SVN: r34198