Hello,
I am working on a project to produce the LTO object file from the compiler
directly. So far, we have
correctly outputted .symtab along with various .debug sections. The only
thing remaining is to
correctly output attribute values and their corresponding values in the
.debug_info section. This is done by the output_die function in
dwarf2out.cc based on the value's class. However, the same
function is used in dwarf2out_finish  as well as dwarf2out_early_finish, so
I suspect that not every value class is being used in dwarfout_early_finish
(mainly I am interested in -flto mode). As there is little documentation on
the same, I experimented by commenting out the various cases of value class
in output die. I found that the classes such as dw_val_class_addr,
dw_val_class_high_pc, and dw_val_class_vms_delta aren't being used during
the early_finish of LTO mode. I might be wrong, as my observation is based
on commenting out and testing a few pieces of code that might need to be
completed. So, can anyone please tell out of these 30 classes that are
relevant to dwarf2out_early_finish in LTO mode or at least point out some
documentation if it exists?
enum dw_val_class
{
  dw_val_class_none,
  dw_val_class_addr,
  dw_val_class_offset,
  dw_val_class_loc,
  dw_val_class_loc_list,
  dw_val_class_range_list,
  dw_val_class_const,
  dw_val_class_unsigned_const,
  dw_val_class_const_double,
  dw_val_class_wide_int,
  dw_val_class_vec,
  dw_val_class_flag,
  dw_val_class_die_ref,
  dw_val_class_fde_ref,
  dw_val_class_lbl_id,
  dw_val_class_lineptr,
  dw_val_class_str,
  dw_val_class_macptr,
  dw_val_class_loclistsptr,
  dw_val_class_file,
  dw_val_class_data8,
  dw_val_class_decl_ref,
  dw_val_class_vms_delta,
  dw_val_class_high_pc,
  dw_val_class_discr_value,
  dw_val_class_discr_list,
  dw_val_class_const_implicit,
  dw_val_class_unsigned_const_implicit,
  dw_val_class_file_implicit,
  dw_val_class_view_list,
  dw_val_class_symview
};

--
Rishi