Which optimisations are are easier or perhaps only possible in the frontend ?

[Daniel Murphy via Digitalmars-d]

"Stefan Koch"  wrote in message news:furihdkmprozoruutsff at forum.dlang.org...

> Hello guys,
> I want to work on optimisations in the semantic analysis stage.
>
> Could you chime in with thoughts about what can only be there and not in 
> llvm-ir for example ?

DMD's inliner might be a good place to start.  There is a lot to be done 
there.