[Bug rtl-optimization/66890] function splitting only works with profile feedback

[andi-gcc at firstfloor dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66890

--- Comment #3 from Andi Kleen <andi-gcc at firstfloor dot org> ---
I suspect the patch may be too simple because it could get stuck in unlikely,
but high frequency edges in the cold area. Perhaps need to adapt more of the
code of the non partitioning reordering