llvm dev - Mar 2017 - Custom Pragma Support

Hello everyone,

I hope that this is the right list to post this question. If not, kindly
accept our apologies for any inconvenience.
We are trying to use the LLVM compiler to support custom pragma annotation
in a source code. As we have already seen this transformation is  also part
of the Clang  LLVM ' s front-end . Because of the lack of documentation,
could you give as  the procedure  in order to achieve that? For example, we
would like to modify the  Clang/LLVM source code to support a "#pragma
 myfunc x" annotation, which will be substituted by the code of myfunc(x) .
Will it be possible ?

Thanks

Manolis
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On Tue, Mar 21, 2017 at 02:01:19PM +0200, Manolis Pissadakis via llvm-dev
wrote:
> Hello everyone,
> 
> I hope that this is the right list to post this question. If not, kindly
> accept our apologies for any inconvenience.
> We are trying to use the LLVM compiler to support custom pragma annotation
> in a source code. As we have already seen this transformation is  also part
> of the Clang  LLVM ' s front-end . Because of the lack of
documentation,
> could you give as  the procedure  in order to achieve that? For example, we
> would like to modify the  Clang/LLVM source code to support a "#pragma
>  myfunc x" annotation, which will be substituted by the code of
myfunc(x) .
> Will it be possible ?
Hi manolis,

this is a common issue and the documentation is quite sparse; I've
written small walkthrough on the different point you need to hack in
clang to support this, here:

   
http://blog.quarkslab.com/implementing-a-custom-directive-handler-in-clang.html

Hope it helps