[llvm-dev] LLD status update and performance chart

[Hal Finkel via llvm-dev]

----- Original Message -----
> From: "Rafael Avila de Espindola" <rafael.espindola at gmail.com>
> To: "Hal Finkel" <hfinkel at anl.gov>
> Cc: "llvm-dev" <llvm-dev at lists.llvm.org>, "Mehdi Amini" <mehdi.amini at apple.com>
> Sent: Tuesday, December 13, 2016 12:09:00 PM
> Subject: Re: [llvm-dev] LLD status update and performance chart
> 
> Hal Finkel <hfinkel at anl.gov> writes:
> >> Why? What is wrong with setting priorities and observing that what
> >> library support we already have has had a disproportional cost?
> >
> > Can you please elaborate on this disproportional cost? I think it
> > is really important to be specific about these kinds of things for
> > the benefit of all potential contributors.
> 
> Yes. Getting the early shutdown code was way more work than it would
> have been if this was just a program. The code is also quite ugly.

This is general issue across LLVM's codebase. Is there some reason this is worse in lld than anywhere else in the project?

> 
> It also prevents us from sharing error handling functions with the
> COFF
> linker.

Is this a technical problem is just a lack of needed refactoring?

Thanks again,
Hal

> 
> So, please, I *BEG YOU*, let us write a linker. Once we have a
> workning, production qualitity linker we can setup a performance
> tracking bot and evaluate each librification change for its cost in
> performance and code quality. We are just not there yet and not in a
> position to take those patches.
> 
> Cheers,
> Rafael
> 

-- 
Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory