[Bug tree-optimization/98855] New: [11 Regression] botan XTEA is 100% slower on znver2 since r11-4428-g4a369d199bf2f34e

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98855

            Bug ID: 98855
           Summary: [11 Regression] botan XTEA is 100% slower on znver2
                    since r11-4428-g4a369d199bf2f34e
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

Since the revision the following is now slower:

$ make clean && ./configure.py --cxxflags="-Ofast -march=znver2" && make -j16
&& ./botan speed XTEA

as seen here:
https://lnt.opensuse.org/db_default/v4/CPP/graph?plot.0=245.710.1&plot.1=171.710.1&;

Algorithm is implemented here:
src/lib/block/xtea/xtea.cpp