[PATCH] [C++/DWARF] Add 'using' support - take 3

[Devang Patel <dpatel at apple dot com>]

Hi All,

[ Ref: http://gcc.gnu.org/ml/gcc-patches/2003-12/msg01778.html]

This revision includes changes to accommodate inputs I received for
previous patch.

List of changes:
- Uses 'processing_template_decl' to filter templates
- Use current scope as context for using-directive instead of current 
namespace
- Instead of emitting abstract or half backed definition now 
force_decl_die()
  forces declaration dies for functions and variables. Related changes 
are
  1) Remove checks that allowed definition die reuse
  2) Selectively remove child dies while using subprogram declaration 
die as
     definition die
  3) Equate declaration die to line number
- gen_subprogram_die() does not return new die

Bootstrapped and tested on i686-pc-linux-gnu
These three test suite runs do not reveal any new regression:
- gcc test suite
- libstdc++ test suite
- gdb test suite using carlton_dictionary-branch

OK for mainline?
Thank you,
-
Devang


2003-01-22  Devang Patel  <dpatel@apple.com>

        * Makefile.in (dwarf2out.o): Depend on input.h
        * dbxout.c (dbx_debug_hooks): Add new empty hook for
        imported_module_or_decl.
        (xcoff_debug_hooks): Same.
        * sdbout.c (sdb_debug_hooks): Same.
        * vmsdbgout.c (vmsdbg_debug_hooks): Same.
        * debug.c (do_nothing_debug_hooks): Same.
        (debug_nothing_tree_tree_enum): New function.
        * debug.h (gcc_debug_hooks): New hook, imported_module_or_decl.
        (dbg_module_or_decl): New enum.
        * dwarf2out.c: Include input.h.
        (dwarf2_debug_hooks): Add new hook for imported_module_or_decl.
        (remove_child_TAG): New function.
        (dwarf_tag_name): Handle DW_TAG_imported_module.
        (gen_subprogram_die): Equate decl number to declaration die. Do 
not
        remove all children dies while reusing declaration die for 
definition.
        Instead, selectively remove only formal parameters.
        (gen_variable_die): Equate variable decl to declaration die.
        (gen_field_die): Equate field decl to line number.
        (force_namespace_die): Replace it with ...
        (force_decl_die): ... this.
        (force_type_die): New function.
        (setup_namespace_context): Replace use of force_namespace_die() 
with
        force_decl_die().
        (gen_namespace_die): Same.
        (dwarf2out_imported_module_or_decl): New function.

        testsuite:

        g++.dg/debug/namespace1.C: New test.

        cp:

        * name-lookup.c: Include "debug.h"
        (do_namespace_alias): Invoke debug_hooks to emit debug info
        for namespace alias.
        (do_local_using_decl): Invoke debug_hooks to emit debug info
        for using decl.
        (do_class_using_decl): Same.
        (do_toplevel_using_decl): Same.
        (do_using_directive): Same.
        (cp_emit_debug_info_for_using): New function.
        * Make-lang.in (cp/parser.o): Depend on debug.h
        (cp/name-lookup.o): Same.

Attachment: dwarf_using.take3.diff
Description: Binary data