How can we call a func template instance using the Mars vendor already ?

[user1234]

Not very important but I'd like to know if it's possible... so 
try this with DMD

```d
module runnable;

// The OK part
int ok1(){return 1;}
int ok2(){return 2;}

void OK()
{
     ulong r;
     asm
     {
         xor R8, R8;
         call ok1;
         add R8, RAX;
         call ok2;
         add R8, RAX;
         mov r, R8;
     }
     assert(r == 3);
}

// The NG part
int ng(int i)() => i;
static foreach (i; 1..3)
     alias T = ng!i;

void NG()
{
     ulong r;
     asm
     {
         xor R8, R8;
         call _D8runnable__T2ngVii1ZQiFNaNbNiNfZi;
         add R8, RAX;
         call _D8runnable__T7ngVii2ZQnFNaNbNiNfZi;
         add R8, RAX;
         mov r, R8;
     }
     assert(r == 3);
}

int main()
{
     OK();
     NG();
     return 0;
}
```

so you'll get

> Error: function `runnable.NG` label 
> `_D8runnable__T2ngVii1ZQiFNaNbNiNfZi` is undefined
> Error: function `runnable.NG` label 
> `_D8runnable__T7ngVii2ZQnFNaNbNiNfZi` is undefined

So to keep things simples the idea is to provide a valid function 
identifier in the asm. I've used compiler explorer to get the 
__valid__ mangled version (https://godbolt.org/z/WYMqMhnWG). No 
luck.

Is that even possible ?