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From: Matthias Boehm <mboehm7@googlemail.com>
Date: Wed, 14 Jun 2017 21:04:05 -0700
Message-ID: <CAOyjQwHLUn8ku6nE6CwuNjGLjoiKtqfKwhjLDtJRaMo3AzSbGQ@mail.gmail.com>
Subject: Re: Rework inter-procedural analysis
To: dev@systemml.apache.org
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archived-at: Thu, 15 Jun 2017 04:04:17 -0000

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sure - I'll try to add some documentation of IPA, probably directly inlined
into the code. Unfortunately, a too verbose dev documentation quickly gets
outdated because nobody updates it - let's see if we find the sweet spot
that works for the project.

Regards,
Matthias


On Wed, Jun 14, 2017 at 4:15 PM, <dusenberrymw@gmail.com> wrote:

> Agreed.  More documentation, especially within the optimizer portion of
> the engine, is quite useful.  Given that a large number of our bugs and
> performance issues stem from this area, it would be good for it to be clean
> and well documented so that future bug searches/fixes can be completed in a
> more expedient manner.
>
> --
>
> Mike Dusenberry
> GitHub: github.com/dusenberrymw
> LinkedIn: linkedin.com/in/mikedusenberry
>
> Sent from my iPhone.
>
>
> > On Jun 14, 2017, at 8:51 AM, Nakul Jindal <nakul02@gmail.com> wrote:
> >
> > Hi Matthias,
> >
> > If its not too much trouble, could you please create a design document
> for
> > this change.
> > This will help the rest of the contributors work on this component as
> well.
> >
> > Thanks,
> > Nakul
> >
> >
> > On Wed, Jun 14, 2017 at 12:00 AM, Matthias Boehm <mboehm7@googlemail.com
> >
> > wrote:
> >
> >> just a quick heads up: in the next couple of days, I'll rework our
> existing
> >> inter-procedural analysis (IPA) in order to (1) create well-defined IPA
> >> passes, (2) reuse functional call graphs across multiple rounds of IPA,
> and
> >> (3) introduce new IPA passes such as fine-grained literal propagation
> and
> >> replacements as well as inlining of functions with control structures.
> This
> >> will help improve the performance and debugging of scripts with complex
> >> function call patterns. However, since this is a rather disruptive
> change,
> >> we might experience temporarily some compiler issues - if that happens
> >> please file anything you encounter against SYSTEMML-1668.
> >>
> >> Regards,
> >> Matthias
> >>
>

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