[llvm-dev] FC : A MLIR+LLVM based Fortran front end

Prashanth N R via llvm-dev llvm-dev at lists.llvm.org
Sun Jan 12 23:45:45 PST 2020

Hi Chris-
We are mostly cleaning up the code for open sourcing. Early code drop will
happen in a day or two and will continue through this week. We would love
to work with the rest of the community on this.


On Mon, Jan 13, 2020 at 11:17 AM Chris Lattner <clattner at nondot.org> wrote:

> Agreed!  Is the code already available?  What are your plans for it, and
> are you interested in collaboration with the rest of the LLVM community?
> -Chris
> On Jan 11, 2020, at 11:58 AM, Finkel, Hal J. via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
> Hi, Prashanth,
> That's great news! It sounds like you've made a lot of progress, and I
> certainly hope that you can make your source available under the LLVM
> license and that we can all work together going forward.
>  -Hal
> On 1/11/20 12:52 PM, Prashanth N R via llvm-dev wrote:
> Hi-
> In August we made an announcement  of "FC: A new fortran front end"  [1].
> At that time to get an end-to-end solution, we made FC to emit LLVM IR
> directly.  At present, we have upgraded FC to emit MLIR. Currently the
> language supported is close to Fortran-95. Apart from 400+ unit test cases,
> out framework passes two SPEC-2017 benchmarks successfully.  Currently we
> are cleaning up the code and plan to open source the same in a week or so.
> Apart from the front end changes, we have defined a new high level dialect
> in MLIR for representing Fortran. We have defined a new Loop Nest
> Optimization framework along with one Loop Nest Optimization in it for the
> time being. Also we have supported 4 OpenMP constructs and way to express
> the same in MLIR framework.
> Entire code is in the spirit of LLVM. If the community is interested, we
> would like to work with the community and move forward.
> thanks,
> -Prashanth
> PS: We did try to use F18 for a while and hit the issues raised in [2],
> [3].
> 1. http://lists.llvm.org/pipermail/llvm-dev/2019-August/134620.html
> 2. http://lists.llvm.org/pipermail/llvm-dev/2020-January/138069.html
> 3.
> http://lists.llvm.org/pipermail/flang-dev/attachments/20191202/6e7c1e51/attachment-0001.pdf
> OR http://lists.llvm.org/pipermail/flang-dev/2019-December/000089.html
> _______________________________________________
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> --
> Hal Finkel
> Lead, Compiler Technology and Programming Languages
> Leadership Computing Facility
> Argonne National Laboratory
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