Re: [avr-llvm-devel] Load / Store

[Weddington, E. <Eri...@at...>]

 

> -----Original Message-----
> From: John Myers [mailto:ato...@gm...] 
> Sent: Monday, November 01, 2010 9:34 PM
> To: Borja Ferrer
> Cc: avr...@li...
> Subject: Re: [avr-llvm-devel] Load / Store
> 
> 
> 	Another thing, i dont know how feasible is doing this, 
> but should we make program and data space addrs transparent 
> to the user?
> 	
> 
> 
> Yes I believe that would be a useful feature.
> I think we should try as much as possible without, of course, 
> violating any language standards.
> It would allow users to write more portable/generic code. 
> We probable should have a command line option to 
> enable/disable this so users have more control.
> LLVM has an address space qualifier mechanism already so I 
> don't think it will take too much work.
> I think most of the work of making it transparent will need 
> to be done in the front ends and optimizer passes. Either way 
> (like a lot of commercial embedded compilers) we'll need to 
> extend the type qualifiers to include things like flash, 
> eeprom, near / far pointers...

I definitely agree with the above, except for the part about a command line option: I would suggest that there be no command line option for this. It will just be extra work for something that I doubt anyone will ever use (a command-line option). Just implement the feature.