[Bug tree-optimization/81953] Code sinking increases register pressure

[pthaugen at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81953

--- Comment #4 from Pat Haugen <pthaugen at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #3)

> The interesting part is also why RTL scheduling doesn't rectify things
> here?

If you're referring to -fsched-pressure, I believe the answer is that those
algorithms are concerned about the case where pressure is more than available
hard regs, which is not the case here.