[Bug middle-end/125849] New: passes.def comment about nonzero bits before IPA is out of date

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125849

            Bug ID: 125849
           Summary: passes.def comment about nonzero bits before IPA is
                    out of date
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Keywords: internal-improvement
          Severity: enhancement
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

Currently the comment in passes.def is:
          /* Don't record nonzero bits before IPA to avoid
             using too much memory.  */
          NEXT_PASS (pass_ccp, false /* nonzero_p */);


But that has not been correct since r7-2810-g209ca542cadd7a which enabled
non-zero bits IPA at -O2 (which later kinda of turned into VRP IPA I think but
I have not double checked there).

This comment should talk about not enabling non-zero bits recording before IPA
at -O1 instead.

If I get some time I will fix this but I doubt it.  I just wanted to record
that the comment is wrong.