[Bug target/121095] Possibly unnecessary PRE pass on aarch64 for fpmr

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121095

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2025-07-15
     Ever confirmed|0                           |1
          Component|rtl-optimization            |target
           Assignee|unassigned at gcc dot gnu.org      |pinskia at gcc dot 
gnu.org

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Maybe a better definition for this macro should be:
```
#define HARDREG_PRE_REGNOS { TARGET_FP8 ? FPM_REGNUM : 0, 0 }
```

This will disable the hardreg GCSE if FP8 is not enabled.