[Bug rtl-optimization/128545] clmul (n, -1) RTL could be improved to Clang

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128545

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |jakub at gcc dot gnu.org
             Status|UNCONFIRMED                 |ASSIGNED
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2026-11-07

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 66110
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=66110&action=edit
gcc17-pr128545.patch

Full lightly tested patch.
Note, for _BitInt something similar can be done, but separately.