[LLVMdev] LLVM code emittion and C++ compiler compatibily

[Chris Lattner]

On Mon, 6 Nov 2006, [ISO-8859-2] Žiga Osolin wrote:
> The problem is this is not possible, because what I would compile to JIT
> are actual classes. The integration of C++ and JIT code is very
> important; for example we would create our own vtbls with JIT-ed code
> addresses as the function call target.

Ok.  Realize that this ties you to a specific compiler version though.

> There is one quite simple approach that I might take (I just came up 
> with it). I could create special really small wrappers for each of these 
> JIT-ed function, that would make the conversion to the common format 
> (being either GCC or VC++). This wrapper could also extract all return 
> values correctly and pass them to native C++ code as required. I think 
> this would be the neatest solution, but would require a speed penalty. 
> The actual wrapper code could be OS dependant:)

Seems feasible.

> Is there any interest for llvm to have such features, such as
> integration directly to GCC compiled code, or VC++ compiled code (at the
> same time)? Because maybe it could be the part of llvm instead of
> baadengine, if you wish of course.

It depends on precisely how it integrates with llvm and how separated it 
is from other components.

-Chris

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