[LLVMdev] Stub LLVM backend wanted

[Tom Stellard]

On Sun, Mar 02, 2014 at 12:41:19AM +0000, David Given wrote:
> I'm trying to port LLVM to a new architecture. I'm finding that the
> initial bootstrapping stage of getting something which will build, even
> if it doesn't work, is complex and rather disheartening --- there's this
> huge cliff of difficulty in just getting all the boilerplate laid out
> correctly, before getting to the fun stuff. The other backends are of
> limited use here because, of course, they're cluttered up with code due
> to being real backends.
> 
> So: does anyone have a stub backend I can use as a starting point?
> Something which only has a few registers, implements no instructions
> other than the minimum necessary to actually compile an empty function,
> contains no custom optimisation passes, etc. From there I can start
> incrementally adding features, testing at each stage.
>

I am not aware of any stub backends, but I think this would be very
useful.  Especially if you could just do:

sed -i 's/Example/TargetName/g' *

and get something that would build.

Maybe this would make a good GSOC project.

-Tom

> (In addition, if anyone knows of any docs other than 'Writing an LLVM
> backend' (which is very short on detail) or 'Creating an LLVM backend
> for the Cpu0 architecture' (which is unfinished), I'd be really
> interested...)
> 
> -- 
> ┌─── ｄｇ＠ｃｏｗｌａｒｋ．ｃｏｍ ───── http://www.cowlark.com ─────
> │ "There does not now, nor will there ever, exist a programming
> │ language in which it is the least bit hard to write bad programs." ---
> │ Flon's Axiom
> 



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