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

C Bergström via llvm-dev llvm-dev at lists.llvm.org
Fri Nov 13 14:32:16 PST 2015

I won't arrive in time to ask @SC15 on Sunday, but some questions

Will this include their CAF runtime? What if any vendor extensions
will be supported? What about directives support like OpenACC/OpenMP?
Is the code itself written in C/C++ or something else? Which Fortran
standards will it support? Will they be open sourcing corresponding

On Sat, Nov 14, 2015 at 5:22 AM, 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.
> We're expecting an initial source-code release from PGI by late 2016, and while that's still far away, PGI's developers will be working closely with the community to coordinate development efforts by others interested in Fortran support (e.g. on ABI support code for other platforms). Even before source code is available, PGI is going to keep the community updated on their progress. After source code is released, PGI will continue development work in coordination with the community to implement additional Fortran and OpenMP features not currently supported by PGI Fortran. The frontend will use LLVM's infrastructure for regression testing, and PGI will be developing regression tests for these new features in accordance with our existing practice.
> I realize this is somewhat unconventional, but I'm confident that this approach will allow the LLVM community to capture the considerable Fortran expertise of PGI's team and provide our project with a production-quality LLVM frontend in a relatively short amount of time.
> For the official announcement, please see:
> https://www.llnl.gov/news/nnsa-national-labs-team-nvidia-develop-open-source-fortran-compiler-technology
>  -Hal
> --
> Hal Finkel
> Assistant Computational Scientist
> Leadership Computing Facility
> Argonne National Laboratory
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