[Bug tree-optimization/99620] Subtract with borrow (SBB) missed optimization

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99620

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
  l_7 = a$l_12 - _1;
  k_8 = l_7 > a$l_12;

vs:

  l_6 = a$l_11 - b$l_12;
  k_7 = a$l_11 < b$l_12;