[LLVMdev] Argument Lowering

[Duncan Sands]

Hi David,

On 12/02/13 18:46, dag at cray.com wrote:
> Duncan Sands <baldrick at free.fr> writes:
>
>> Rather than trying to have LLVM codegen take care of ABI issues (which means
>> passing all kinds of extra information in the IR), another possibility is to
>> have LLVM provide a helper library for generating correct IR.  You would say
>> to the library: my parameter is a union type with these fields (described
>> using C/C++ language concepts such as unions, POD etc), and it would tell you
>> what IR to output (or output it for you).  This library could then be used by
>> clang and every front-end confronted with ABI issues.  There is a bug report
>> about this somewhere.
>
> That sounds like an excellent idea.  I am basically at the point of
> rewriting our argument handling due to some past sub-optimal design
> choices.  I can't promise anything at the moment (gotta go through
> corporate) but it would be in my interest to contribute that code to
> such a library.

I guess you could try to factor Clang's ABI code out.

Ciao, Duncan.