Symbol table 14/many: remove rest of reachability code

[H.J. Lu]

On Mon, Apr 23, 2012 at 2:07 AM, Jan Hubicka <hubicka@ucw.cz> wrote:
> Hi,
> this patch removes remaining traces of the code handling needed and
> reachability flags and replaces last use of it in cgraph_mark_reachable_node by
> pointer set.  It is nice to have 60k of patch that essentially just removes
> things.
>
> Bootstrapped/regtested x86_64-linux, will commit it after rebuilding Mozilla.
>
> Honza
>
>        * lto-symtab.c (lto_cgraph_replace_node): Do not call
>        mark_reahcable_node.
>        * cgraph.c (cgraph_remove_node): Do not clear reachable.
>        (cgraph_mark_reachable_node): Remove.
>        (cgraph_mark_force_output_node): Do not set reachable.
>        (dump_cgraph_node): Do not dump reachable.
>        (cgraph_create_virtual_clone): Do not set reachable.
>        * cgraph.h (cgraph_node): Remove reachable flag.
>        (varpool_node): Remove reachable flag.
>        (cgraph_mark_if_needed): Remove.
>        (cgraph_mark_reachable_node): Remove.
>        * tree-emutls.c (ipa_lower_emutls): Do not check
>        reachable.
>        * cgraphunit.c (cgraph_finalize_function): Do not mark node as
>        reachable.
>        (cgraph_add_new_function): Likewise.
>        (cgraph_mark_if_needed): Remove.
>        (cgraph_analyze_function): Do not set target as reachable.
>        (process_function_and_variable_attributes): Do not care about dllexport.
>        (cgraph_analyze_functions): Do not set reachable flags.
>        (cgraph_mark_functions_to_output): Do not check reachability.
>        (cgraph_copy_node_for_versioning): Do not set reachable flag.
>        (dbxout_expand_expr): Update.
>        * c-decl.c (merge_decls): Do not track changed externs.
>        * ipa.c: Include pointer-set.h
>        (enqueue_cgraph_node): Use reachable pointer set.
>        (process_references): Likewise.
>        (cgraph_remove_unreachable_nodes): Likewise.
>        (whole_program_function_and_variable_visibility): Do not recompute reachable.
>        * trans-mem.c (ipa_tm_execute): Do not check reachable flag.

This patch caused:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53106

-- 
H.J.