[Bug tree-optimization/85726] div C1 to div C2 match.pd suboptimization

[hp at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85726

--- Comment #1 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
Created attachment 44107
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44107&action=edit
test-case