consistent numbering scheme for function codes between the C and C++
frontends, so that everything ties up in LTO.
- Currently, tree-streamer-in.c:unpack_ts_function_decl_value_fields
+ Currently, tree-streamer-in.cc:unpack_ts_function_decl_value_fields
validates that tree nodes returned by TARGET_BUILTIN_DECL are non-NULL and
some node other than error_mark_node. This is a holdover from when builtin
decls were streamed by code rather than by value.