[Bug tree-optimization/122083] [15/16 Regression] Bogus -Wnonnull for call to memcmp with length determined using <=> operator

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122083

--- Comment #11 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 62500
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62500&action=edit
Patch for the missed optimization (non-SRA)

This is the patch which I am testing. It should improve code elsewhere too.