[LLVMdev] Using LLVM to convert a language to another language

[Jim Grosbach]

On Mar 8, 2011, at 12:47 PM, krys at polarlights.net wrote:

> Hi,
> 
> Sorry for my newbies questions... but here it is...
> 
> My goal is to have a "shading language", it is very similar to the "C" language but with special tokens. 
> 
> I have a parser and a lexer done with Lex/bison, once I have lexed/parsed my "shading language" I must create 3 new "source code" in OpenCL.
> 
> It mean that by example for the following :
> 
> shader matte(float Kd, color c)
> {
>  Ci = diffuse(Kd * c);
> }
> 
> I have to create 3 methods in OpenCL, by example
> 
> 1 - matte_sampling
> 2 - matte_pdf
> 3 - matte_f
> 
> Each of theses method is in OpenCL (It is like C too).
> 
> So, I would like to use LLVM to create an optimized version of my shader code. But once I have the LLVM byte code... how can I parse it "easily" to create my shader code ?

At a high level, this sounds like like a task better suited for Clang. I'd suggest asking on cfe-dev about source-to-source rewriting.

-Jim

> 
> NB: also, you can tell me if it is really a good idea !
> 
> Thanks
> 
> 
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