[Bug plugins/105171] gcc/toplev.c: `local_tick` can overflow and become -1

["pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105171

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |WAITING
          Component|driver                      |plugins
   Last reconfirmed|                            |2022-04-05

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>    local_tick = (unsigned) tv.tv_sec * 1000 + tv.tv_usec / 1000;

The only place where local_tick is used is inside coverage.cc:
  if (!flag_branch_probabilities && flag_test_coverage
      && (!local_tick || local_tick == (unsigned)-1))
    /* Only remove the da file, if we're emitting coverage code and
       cannot uniquely stamp it.  If we can stamp it, libgcov will DTRT.  */
    unlink (da_file_name);


This does not make a difference really here.

Plus inside a plugin, I don't see why you care about if -frandom-seed was
supplied or not.