[Bug ipa/104203] New: [12 Regressions] huge IPA compile-time regression

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104203

            Bug ID: 104203
           Summary: [12 Regressions] huge IPA compile-time regression
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

https://gcc.opensuse.org/gcc-old/c++bench-czerny/random/

shows huge IPA regressions at -O0+ for the PR63155-[12].c and PR91257.c
testcases

 callgraph optimization             :  60.42 ( 85%)   0.01 (  3%)  60.43 ( 85%)
   15k (  0%)
 callgraph ipa passes               :  64.10 ( 90%)   0.12 ( 36%)  64.23 ( 90%)
  695M ( 97%)

just like the above.