[Bug tree-optimization/121356] [13/14/15/16 Regression] missing VRP though the loop with shifts

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121356

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note solving this missed optimization will also solve PR 121345.