[Bug middle-end/79665] gcc's signed (x*x)/200 is slower than clang's

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79665

--- Comment #11 from ktkachov at gcc dot gnu.org ---
Looks like the sdiv comes from the % 300 expansion (an sdiv followed by a
multiply-subtract). Need to figure why MOD expressions are affected by this
change