What's missing to make D2 feature complete?

[via Digitalmars-d]

On Wednesday, 24 December 2014 at 17:46:39 UTC, Matthias Bentrup 
wrote:
> Do you propose any changes to the language syntax for
> auto-vectorization and whole program optimization ?

You mean semantics.

> As far as I
> can see, those are compiler features, they are not related to 
> the language syntax/semantics at all.

How you structure an array of structs affects performance. What 
you do in loops affects ability to auto vectorize. How will the 
compiler know how to lay out arrays of structs if you don't have 
whole program optimization? How can you be maximize the ability 
to vectorize processing if you don't deliberately design for it? 
It affects language design, library design and application 
architecture.