[Bug target/113832] New: [14 Regression] 6% exec time regression of 464.h264ref on aarch64

[fkastl at suse dot cz via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113832

            Bug ID: 113832
           Summary: [14 Regression] 6% exec time regression of 464.h264ref
                    on aarch64
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: needs-bisection
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fkastl at suse dot cz
  Target Milestone: ---
              Host: aarch64-gnu-linux
            Target: aarch64-gnu-linux

As seen here

https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=586.220.0

between commits

g:cc7aebff74d89675
g:314cbfe2980b32f5

there is a 6% slowdown of the 464.h264ref 2006 SPEC benchmark. Compiler options
are:

-Ofast -march=native -flto PGO

The CPU is Ampere Altra - Neoverse N1.