D1 to be discontinued on December 31, 2012

[Walter Bright]

On 12/15/2011 6:33 AM, bearophile wrote:
>> I should add that the XMM register support is for 64 bit targets, and also
>> the register allocator will enregister float and double variables in XMM
>> registers.<
> Will DMD use 8 XMM registers in 32 bit code too?

We'll see, but it's a harder problem.

>> Putting the compiler in D would make it difficult to integrate the D front
>> end into the C/C++ back ends of gcc and llvm.<
>
> Writing the reference front-end in D has some advantages: - Other people have
> lot of C/C++ code; if they want to use D they will probably want to interface
> C/C++ with D code. So writing the compiler front-end in D is a way to eat
> some of the D dog food, and see/test how much good such interfacing is, and
> eventually it's a push to improve it.

D is designed to use C libraries. It is not designed to be a library accessible 
from C - D wants to be in charge of the startup.

> If some parts of the D2 language are badly designed or they
> lead to low performance (like fixed sized array assignment) this is a good
> way to spot such problems and a way to push to fix them.

That isn't the issue.