Runtime for ARM

[Paolo Invernizzi]

On Saturday, 16 February 2013 at 23:35:58 UTC, Kai Nacke wrote:
> On Saturday, 16 February 2013 at 18:38:49 UTC, Paolo Invernizzi 
> wrote:
> Hi Paolo!
>
> Just an assumption: You need to write an ABI class for ARM.
> HandleByVal is called during argument lowering in LLVM. The 
> comment of this function says:
>
> /// HandleByVal - Every parameter *after* a byval parameter is 
> passed
> /// on the stack.  Remember the next parameter register to 
> allocate,
> /// and then confiscate the rest of the parameter registers to 
> insure
> /// this.
>
> I can imagine that there is something wrong with the calling 
> convention in LDC. You should look at gen/abi-x86.cpp and 
> gen/abi-x86-64.cpp to get a feeling what you need to do. Then 
> write an abi-arm which models the ARM calling convention. It is 
> really easy if you have an understanding of the used calling 
> convention.
>
> But remember: this is only a shot in the dark from me. I never 
> got that far on my ARM box...
>
> Regards
> Kai

Hi Kay,

Thanks for the tip, I'm really an ARM newbie, but I'll give a 
look to gen/abi and I'll try to find out something about the ARM 
calling convention...

Right now I've reduced the ice to something like:

template Rebindable(T) {
     struct Rebindable {
         void opAssign(Rebindable ) {}
     }
}
struct SysTime {
     Rebindable!(TimeZone) _timezone;
}
class TimeZone {}

ice with ldc2 -c ice.d -march=arm -mcpu=cortex-a9 
-mtriple=arm-linux-gnueabihf

Cheers,
Paolo