[Bug rtl-optimization/127688] -fcompare-debug failure when DEBUG_INSN changes selective-scheduling issue-group markers

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127688

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Selective scheduling is known to break compare-debug, after all,
-fvar-tracking-assignments is turned off by default in that case:
  if (!opts_set->x_flag_var_tracking_assignments)
    opts->x_flag_var_tracking_assignments
      = (opts->x_flag_var_tracking
         && !(opts->x_flag_selective_scheduling
              || opts->x_flag_selective_scheduling2));
and the compiler should warn you that it doesn't support that
      && (opts->x_flag_selective_scheduling
          || opts->x_flag_selective_scheduling2))
    warning_at (loc, 0,
                "var-tracking-assignments changes selective scheduling");