[LLVMdev] GSoC project questions.

[Alex L]

Hi again.

I've though more about the full standard being too ambitious, and now I
fully agree with that. So I had a go at choosing the useful subset of
Fortran on which I would like to work on - my update proposal can be viewed
at https://gist.github.com/hyp/5434845 .
Focusing on less should also improve my productivity and lead to a better
summer of code project by drastically reducing the pressure :)


2013/4/22 Alex L <arphaman at gmail.com>

> Thanks for the responses!
>
>
>> I might be wrong (I'd love to be wrong here!) but I think this is a bit
>> too ambitious
>>
>  You might be right about it being too ambitious, it would certainly be
> wise to aim for less. A more polished, but less broad product is definitely
> better than a buggy standard compliant one, and I think that it would go
> better with the general philosophy of GSoC. I will take this fact into
> consideration for the revised proposal.
>
>
> Also, in your proposal, it looks as though you're not writing tests until
>> the end; tests need to be written as soon as the features are testable.
>>
>  That's kind of true, but I actually planned on writing tests during
> feature development, it's just that these tests wouldn't cover everything
> and should be expanded and tested fully towards the end of GSoC. I should
> definitely mention that in my plan.
>
>  As for the tooling support, I guess that it wouldn't hurt to take the
> fact that tools should be integrated with flang in the future into account
> during the development. I will take a look on how clang and various tools
> for it operate.
>
>
> 2013/4/22 Hal Finkel <hfinkel at anl.gov>
>
>> ----- Original Message -----
>> > From: "Dmitri Gribenko" <gribozavr at gmail.com>
>> > To: "Alex L" <arphaman at gmail.com>
>> > Cc: "LLVM Developers Mailing List" <llvmdev at cs.uiuc.edu>
>> > Sent: Monday, April 22, 2013 9:00:51 AM
>> > Subject: Re: [LLVMdev] GSoC project questions.
>> >
>> > On Mon, Apr 22, 2013 at 4:30 PM, Alex L <arphaman at gmail.com> wrote:
>> > > Thanks for your support.
>> > > I wrote my draft GSoC proposal, it can be viewed here -
>> > > https://gist.github.com/hyp/5434845
>> > > Please read it and tell me what you think. Any criticisms or
>> > > suggestions are
>> > > welcome!
>> >
>> > Hello Alex,
>> >
>> > > I plan to make flang a fully featured frontend which fully supports
>> > > Fortran 77
>> >
>> > I might be wrong (I'd love to be wrong here!) but I think this is a
>> > bit too ambitious.  Given that you have to write tests *as you
>> > implement the features*, handle corner cases (and one has to actually
>> > discover corner cases from the standard, if one is not familiar with
>> > Fortran) and produce diagnostics for invalid code, I don't think it
>> > is
>> > possible to implement all of the frontend + codegen within 12 weeks.
>>
>> Alex, I agree with Dmitri, I think that the proposal sounds a little too
>> ambitious. Maybe everything will go smoothly and you'll be able to
>> accomplish everything that you'd like, but we should plan for less. I favor
>> identifying a useful subset (such as that needed for BLAS) and focusing on
>> doing a really good job on that subset rather than trying to get full
>> feature coverage. In my experience, coding tests and high-quality
>> warning/error messages takes more time than coding the feature itself.
>> Also, in your proposal, it looks as though you're not writing tests until
>> the end; tests need to be written as soon as the features are testable.
>>
>> Regarding motivation, I would also like to bring the same kind of
>> "tooling" (analysis and transformation) support available in Clang to
>> Fortran. Not that this specifically impacts your project, but I think is an
>> important part of the longer-term motivation for developing an LLVM Fortran
>> frontend.
>>
>> I am glad that you're excited about working on this project!
>>
>>  -Hal
>>
>> >
>> > Dmitri
>> >
>> > --
>> > main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if
>> > (j){printf("%d\n",i);}}} /*Dmitri Gribenko <gribozavr at gmail.com>*/
>> > _______________________________________________
>> > LLVM Developers mailing list
>> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>> > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>> >
>>
>
>
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