[Bug c/78406] New: Crafty v23.4 is 20% slower under GCC 6.2 than under Clang 3.9

[t.artem at mailcity dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78406

            Bug ID: 78406
           Summary: Crafty v23.4 is 20% slower under GCC 6.2 than under
                    Clang 3.9
           Product: gcc
           Version: 6.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: t.artem at mailcity dot com
  Target Milestone: ---

http://www.phoronix.com/scan.php?page=article&item=gcc-clang-kblclear&num=4

GCC 6.2.0 - 95 seconds
Clang 3.9.0 - 78 seconds

GCC options: -lstdc++ -lm

CPU: Kaby Lake 7200U (the same CPU core as Sandy Bridge)