Feature Request: enhanced inline ASM

[Joel C. Salomon]

Dan wrote:
> The thing that I'm sure Walter doesn't want to do though is trick assembler programmers into thinking they can access a ways down the "." chain all the time.
> 
> Let me explain: If we have:
> 
> struct b {
>   char[] s;
> }
> 
> struct a {
>   void* x = b;
>   union y {
>     int z;
>   }
> }
> 
> 
> 
> You can access a.y.z, but not a.x.s.ptr  The first just performs a structure offset while the second has to lea through x, and then again through b.s.ptr; more than one instruction ought to be illegal.  It's asm after all.

I come at this from the Plan 9 perspective, where the assembler adds 
LEAs to give the impression that the x86 instruction set is more regular 
than it really is, or to implement convenient addressing modes we’d like 
to pretend the CPU had.  I’d vote to put the LEAs in transparently — but 
on low priority; that’s a nice assembler feature, not so much for a 
compiler.

--Joel