[Bug tree-optimization/102943] New: VRP threader compile-time hog with 521.wrf_r

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102943

            Bug ID: 102943
           Summary: VRP threader compile-time hog with 521.wrf_r
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

Compiling 521.wrf_r with -Ofast -march=znver2 -flto results in one LTRANS unit
(unit 105) showing

 tree VRP threader                  : 122.22 ( 44%)   0.04 (  3%) 124.84 ( 44%)
   18M (  2%)
 TOTAL                              : 280.88          1.23        286.88       
  849M

note WRF is prone to run into RTL DF scalability issues as well where other
LTRANS units spend 40% of the compile-time in but the VRP threader issue is
new.