[Bug rtl-optimization/127870] Reassociation of __int128 sum costs a callee-saved register on x86-64

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127870

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-*-*
     Ever confirmed|0                           |1
           Keywords|                            |missed-optimization
             Status|UNCONFIRMED                 |NEW
          Component|tree-optimization           |rtl-optimization
   Last reconfirmed|                            |2026-10-13

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The association canonicalizes only, this looks like a scheduling/RA issue. 
Confirmed for the observation.