[PATCH] LTO: introduce object file-based on-disk module format.

[Peter Collingbourne]

On Sun, Jul 06, 2014 at 02:01:32PM -0400, Rafael Espíndola wrote:
> >> BTW, what will be producing these files with .go_export and llvm IR?
> >> Is in a new GO FE?
> >
> > This Go frontend: https://github.com/go-llvm/llgo/tree/libgo
> >
> > I decided to spend some time this weekend trying to teach it LTO.
> 
> Interesting.
> 
> A higher level question is how relevant the format is to the llvm
> project itself. If this was needed just for that one compiler, I would
> be tempted to say that the llgo compiler should provide its own
> gold/bfd plugin.
> 
> I think the proposed format is fairly general and is an useful
> addition, but it would be nice to see what others think. Would you
> mind sending a quick email to llvmdev with the proposal for supporting
> IR in native object format? The reason I think this is general is
> 
> * Other languages are likely to have similar use for native files with
> custom sections.
> * We could use the format for fat objects in LTO of C/C++ where the
> plugin can cherry pick functions from the enclosing ELF if they are
> cold.

My thoughts exactly. Proposal sent.

Thanks,
-- 
Peter