[Bug target/126271] New: reduc_plus_scal_V2DF aka ix86_expand_reduc does not honor -mtune-ctrl=v2df_reduction_prefer_haddpd

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126271

            Bug ID: 126271
           Summary: reduc_plus_scal_V2DF aka ix86_expand_reduc does not
                    honor -mtune-ctrl=v2df_reduction_prefer_haddpd
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Keywords: missed-optimization, testsuite-fail
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---
            Target: x86_64-*-*

Vectorizing gcc.target/i386/pr54400.c makes it FAIL as .REDUC_PLUS expansion
does not honor -mtune-ctrl=v2df_reduction_prefer_haddpd