Can we kill the D calling convention already?

[CTFE-4-the-win]

On Wednesday, 25 April 2012 at 17:51:45 UTC, Alex Rønne Petersen 
wrote:
>> Introducing a commen calling convention would be one approach. 
>> The other
>> would be to templatize D's inline assembler?
>
> All the big compiler back ends are not realistically going to 
> implement some random calling convention because we tell them 
> to.

Hmmm... actually, only the symbols marked with 'export' would 
matter, we could have our own super optimized calling convention 
internally... no?