[Bug middle-end/78726] [5/6/7 Regression] Incorrect unsigned arithmetic optimization

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78726

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |jakub at gcc dot gnu.org

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 40281
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40281&action=edit
gcc7-pr78726.patch

Untested fix.