D compiler layers

[bearophile]

Tim Matthews:
> In my opinion there should be one set of libraries (not limited to 2 
> layers) that is generalized enough to be used by any compiler, ide or 
> other tools for d too.

I know, Clang design is probably better. But it's a very different design. What I am asking is an improvement of the current D2 front-end code to allow its better usage with the LLVM backend. I'm asking to separate better the compilation phases.

Bye,
bearophile