[Bug tree-optimization/98474] [8/9/10/11 Regression] incorrect results using __uint128_t

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98474

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 49858
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49858&action=edit
gcc11-pr98474.patch

Untested fix.