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

[jakub at gcc dot gnu.org]

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

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
You can put a breakpoint at the new expr.c code and see what both the unsigned
and signed sequences are and see what seq_cost gcc computed.  If the costs
don't match the hw, then it can of course choose a worse sequence.