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

[gabravier at gmail dot com]

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

--- Comment #4 from Gabriel Ravier <gabravier at gmail dot com> ---
Created attachment 49865
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49865&action=edit
Pre-processed source of a file reproducing the bug