dwarf2out.c (scope_die_for): Don't rely on the decl_scope_table notion of nesting...

dwarf2out.c (scope_die_for): Don't rely on the decl_scope_table notion of nesting to find the DIE for a type...

        * dwarf2out.c (scope_die_for): Don't rely on the decl_scope_table
        notion of nesting to find the DIE for a type or function.
        DIEs can go in limbo even if we got a context_die.
        (push_decl_scope): Our context doesn't need to be in decl_scope_table.
        (gen_struct_or_union_type_die): Don't use TREE_PERMANENT to test
        for local type.
        (gen_decl_die): Ignore NAMESPACE_DECLs for now.
        (gen_type_die): Writing out the context doesn't cause member class
        template instantiations to be written out as well.

From-SVN: r30540