Reduce the amount of generated IL instructions

[fholm]

The compiler generates very complex expression tree graphs for certain operations. A lot of it is for speed reasons, but there are cases where the currently used scheme makes the IL instruction count balloon out of control.

We should look into reducing the IL size, even if it requires us to sacrifice performance in a few cases. I'm going to document the exact cases where the IL balooning happen and track the progress of reducing it in here.