A new calling convention in VS2013

[Benjamin Thaut]

Am 14.07.2013 14:11, schrieb bearophile:
> Benjamin Thaut:
>
>> http://d.puremagic.com/issues/show_bug.cgi?id=10226
>
> I see there are codegen inefficiencies.
>
>
>> Until dmd uses the XMM registers correctly it doesn't make much sense
>> to add a special calling convetion for this purpose.
>
> I don't agree, because:
> - Even if DMD codegen is far from not perfect, it's a good idea to
> improve all things in parallel. Generally improving things (or fixing
> bugs) gives a better result if you adopt a pipelined development approach.
> - A vector calling convention is meant to be usable on other compilers
> too, like LDC2, that have better codegen. (The asm I have shown in this
> thread comes from LDC2 because dmd doesn't even use SIMD registers on
> Windows 32 bit).
>
> Bye,
> bearophile

I just wanted to say that there are currently bigger fish to fry then 
micro optimization through calling convetions. (GC, allocators, all the 
bugs...)

Did you compile the shown code with optimization enabled or is that a 
debug build? If it is optimized I'M going to be disappointed by LDCs 
codegen.

Kind Regards
Benjamin Thaut