Handling labels in delay-slot scheduling

[Joern Rennecke]

Quoting Tom de Vries <vries@codesourcery.com>:

> About the penalty, I don't really know. But since the optimization is
> both filling delay slots and removing
> duplicate code, it looks like a good idea to me.

It's usually beneficial, but for some microarchitectures, this kind of
code confuses the branch predictor.
So there should be a way for the port to turn this off.