[Bug target/114412] New: [14 Regression] 7% slowdown of 436.cactusADM on aarch64

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114412

            Bug ID: 114412
           Summary: [14 Regression] 7% slowdown of 436.cactusADM on
                    aarch64
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: missed-optimization, needs-bisection
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pheeck at gcc dot gnu.org
            Blocks: 26163
  Target Milestone: ---
              Host: aarch64-gnu-linux
            Target: aarch64-gnu-linux

As seen here

https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=586.100.0

there is a 7% execution time slowdown of the 436.cactusADM SPEC 2006 benchmark
between commits

g:2d8cd712b17e88f2
g:46666b9bde5903d8

The compilation options are: -Ofast -march=native -mtune=native -flto PGO.

The CPU is Ampere Altra - Neoverse N1.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)