[Bug tree-optimization/122586] New: [16 Regression] 4-5% slowdown of 538.imagick_r on Intel Ice Lake (3rd generation Xeon)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122586

            Bug ID: 122586
           Summary: [16 Regression] 4-5% slowdown of 538.imagick_r on
                    Intel Ice Lake (3rd generation Xeon)
           Product: gcc
           Version: 16.0
            Status: UNCONFIRMED
          Keywords: missed-optimization, needs-bisection
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pheeck at gcc dot gnu.org
            Blocks: 26163
  Target Milestone: ---
              Host: x86_64-linux
            Target: x86_64-linux

As seen here

https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=801.507.0

there was a 4-5% exec time slowdown of the 538.imagick_r SPEC 2017 benchmark
between commits

r16-4570-ga52888dc71924a
r16-4588-g81a7f4fef35542

when compiled with -Ofast -march=native on an Intel Ice Lake (3rd generation
Xeon) machine.


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)