[Bug rtl-optimization/98438] Rather bad optimization of midpoint implementation for __int128 (and other types)

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98438

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
           Severity|normal                      |enhancement
           Keywords|                            |ra
   Target Milestone|---                         |11.0
          Component|target                      |rtl-optimization

--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Thanks for the expanded test case.

The assembly with gcc 8 for int is identical to that with trunk,
for _int128 it is a bit longer, so this does not appear to be
a regression.

The 128-bit case looks like a problem with register allocation.

Confirming, changing component, adding relevant keywords.