John,

> These are special for the mac VM because of how global variable 
> accessor code is generated in gcc for powerpc 
> (Globalstructure-JMM.1.cs + MoreInterpAccessors-JMM.2.cs). 
> CGeneratorEnhancements-ajh.cs originally part of the BC vm provides 
> better optimization for ppc and 68k machines. It's undetermined on 
> intel machines.

I never got a working VM out of the CG enhancements. It generates code
and it compiles but it doesn't run. So I'm not too eager to see it in
the update stream. For the other two its pretty clear that they'll slow
down things.

Cheers,
  - Andreas