[Bug tree-optimization/98856] New: [11 Regression] botan AES-128/XTS is slower by ~17% since r11-6649-g285fa338b06b804e72997c4d876ecf08a9c083af

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98856

            Bug ID: 98856
           Summary: [11 Regression] botan AES-128/XTS is slower by ~17%
                    since
                    r11-6649-g285fa338b06b804e72997c4d876ecf08a9c083af
           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
                CC: rguenth at gcc dot gnu.org
  Target Milestone: ---

Since the revision the following is slower:

$ make clean && ./configure.py --cxxflags="-Ofast -march=znver2 -fno-checking"
&& make -j16 && ./botan speed AES-128/XTS

as seen here:
https://lnt.opensuse.org/db_default/v4/CPP/graph?plot.0=226.721.1&plot.1=14.721.1&;