[Bug target/116979] [12/13/14/15 regression] fma not always used in complex product

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116979

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[12 regression] fma not     |[12/13/14/15 regression]
                   |always used in complex      |fma not always used in
                   |product                     |complex product
   Last reconfirmed|                            |2024-10-04
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Target Milestone|---                         |12.5

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
x86:

/app/example.cpp:6:1: note: Cost model analysis for part in loop 0:
  Vector cost: 172
  Scalar cost: 184



aarch64:
/app/example.cpp:6:1: note: Cost model analysis for part in loop 0:
  Vector cost: 37
  Scalar cost: 12

So yes a cost model issue.