[Bug middle-end/93092] g++ takes tremendous compilation times in var-tracking

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93092

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |memory-hog
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2020-01-09
            Summary|g++ takes tremendous        |g++ takes tremendous
                   |compilation times           |compilation times in
                   |                            |var-tracking
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
-O0 -g is quick, enabling var-tracking for -O0 shows it taking 70% of the
compile-time.  Disabling var-tracking makes -O1 and -O2 quick as well.

So - -fno-var-tracking is a good workaround.  Somehow it's own limitation
doesn't apply to this testcase.