[llvm-dev] Adapting and open-sourcing PGI's Fortran frontend for LLVM

Neely, Rob via llvm-dev llvm-dev at lists.llvm.org
Thu May 26 13:57:10 PDT 2016

Chad, et al,

In addition to Doug’s excellent technical update, I’ll note that we are
starting to have some discussions on the DOE side with PGI about
establishing a more formal review team made up of some key LLVM
stakeholders to help smooth the way for a broader public rollout of the
Flang code base and eventual integration. We’ll probably rely on Hal and
others here to help us figure out who that group might be. My expectation
is that it would involve a few WebEx/telecons on an as-needed basis
(perhaps quarterly?) starting later this summer when code starts to move
out of PGI’s internal systems and into a private github space. Stay tuned
- we (both DOE and PGI) are keenly interested in doing what we can to make
this successful.

—Rob Neely, LLNL

On 5/26/16, 11:57 AM, "douglas miles (PGI)" <douglas.miles at pgroup.com>

>Hi Chad - We have a functional Fortran compiler, with the PGI front-end
>bridged directly to LLVM, all of our Fortran runtime libraries
>integrated, and the Clang driver adapted for use with the Fortran
>compiler.  We're working with a few users at DOE who are trying to
>compile big applications with a binary version of the compiler.  Work is
>ongoing to migrate the source code into an LLVM-style repository, build
>infrastructure, documentation and web pages.  All of the compiler and
>runtime source is now built with Clang or the Fortran front-end with
>LLVM.  Much work remains on source code refactoring and documentation;
>we expect that work to accelerate once all the infrastructure work is
>-----Original Message-----
>From: Hal Finkel [mailto:hfinkel at anl.gov]
>Sent: Thursday, May 26, 2016 9:17 AM
>To: mcrosier at codeaurora.org
>Cc: flang-dev; douglas miles (PGI); Rob Neely; Chris Lattner;
>llvm-dev at lists.llvm.org
>Subject: Re: [llvm-dev] Adapting and open-sourcing PGI's Fortran frontend
>for LLVM
>Hi Chad,
>I can tell you that progress is being made on PGI's side; I'll let
>Doug/Rob provide more detailed updates.
> -Hal
>----- Original Message -----
>> From: "Chad Rosier" <mcrosier at codeaurora.org>
>> To: "Hal Finkel" <hfinkel at anl.gov>
>> Cc: "flang-dev" <flang-dev at googlegroups.com>, "douglas miles (PGI)"
>><douglas.miles at pgroup.com>, "Rob Neely"
>> <neely4 at llnl.gov>, "Chris Lattner" <clattner at apple.com>,
>> llvm-dev at lists.llvm.org
>> Sent: Thursday, May 26, 2016 10:47:19 AM
>> Subject: RE: [llvm-dev] Adapting and open-sourcing PGI's Fortran
>>frontend	for	LLVM
>> Hi Hal,
>> I haven't been following this closely, but has there been any updates
>> recently.
>>  Regards,
>>   Chad
>> -----Original Message-----
>> From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of
>> Chris Lattner via llvm-dev
>> Sent: Sunday, November 15, 2015 12:46 AM
>> To: Hal Finkel <hfinkel at anl.gov>
>> Cc: LLVM Dev <llvm-dev at lists.llvm.org>; flang-dev
>> <flang-dev at googlegroups.com>; douglas miles (PGI)
>> <douglas.miles at pgroup.com>; Rob Neely <neely4 at llnl.gov>
>> Subject: Re: [llvm-dev] Adapting and open-sourcing PGI's Fortran
>> frontend for LLVM
>> > On Nov 13, 2015, at 2:22 PM, Hal Finkel via llvm-dev
>> > <llvm-dev at lists.llvm.org> wrote:
>> > 
>> > Hi everyone,
>> > 
>> > I have some very good news for everyone interested a
>> > production-quality Fortran frontend for LLVM:
>> > 
>> > The U.S. Department of Energy’s National Nuclear Security
>> > Administration and its three national labs have reached an agreement
>> > with NVIDIA's PGI division to adapt and open-source PGI's Fortran
>> > frontend, and associated Fortran runtime library, for contribution
>> > to the LLVM project. PGI is now working on isolating the necessary
>> > frontend components from their existing compiler code base and
>> > adapting those components to produce LLVM IR for consumption by our
>> > existing infrastructure.
>> This sounds very interesting Hal (and Doug), and I’m glad to hear
>> about it.  I look forward to when more details and code is available,
>> -Chris
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>Hal Finkel
>Assistant Computational Scientist
>Leadership Computing Facility
>Argonne National Laboratory
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