[Bug target/114860] New: [aarch64] 511.povray regresses by ~5.5% with -O3 -flto -march=native -mcpu=neoverse-v2

[prathamesh3492 at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114860

            Bug ID: 114860
           Summary: [aarch64] 511.povray regresses by ~5.5% with -O3 -flto
                    -march=native -mcpu=neoverse-v2
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: prathamesh3492 at gcc dot gnu.org
  Target Milestone: ---

Hi,
It seems performance of povray bmk is regressing ~5.5% with -O3 -flto
-march=native -mcpu=neoverse-v2, and ~1.6% without LTO.

This seems to have happened after following commit:
https://gcc.gnu.org/git/gitweb.cgi?p=gcc.git;h=a2f4be3dae04fa8606d1cc8451f0b9d450f7e6e6

Reverting it brings back performance. I am investigating further.

Thanks,
Prathamesh