[flang-dev] FC: LLVM based Fortran Frontend

[Prashanth N R via flang-dev]

We have not stated that we are not interested in working with knowledgable
flang folks. We have just released FC version 0.1 and contemplating what
should be next. We will get back to the community in a near future.

thanks,
-Prashanth

On Fri, Aug 23, 2019 at 4:03 AM André Jansen Medeiros Villar <
goolic at gmail.com> wrote:

> Also in case you´re not interested in working with the flang folks can you
> explain the vision for FC and how it´s different than flang ?
>
> Em seg, 19 de ago de 2019 às 11:53, Jeff Hammond via flang-dev <
> flang-dev at lists.llvm.org> escreveu:
>
>> Why not contribute to Flang or F18 instead? What are the technical and
>> nontechnical advantages of your project over those?
>>
>> I’m happy to see LLVM used all over the place, but I want the community
>> focused on building one very good OSS Fortran front-end for LLVM, rather
>> than five decent ones.
>>
>> Jeff
>>
>> On Aug 19, 2019, at 6:57 AM, Prashanth N R via flang-dev <
>> flang-dev at lists.llvm.org> wrote:
>>
>> A new front end for Fortran (https://github.com/compiler-tree-technologies/fc ) has been written in the
>> design spirit of LLVM/Clang. This is a prototype version with approximately
>> 20K+ lines of code. The compiler is close to Fortran 95 standard. The Front
>> end is a complete end to end solution without semantic analysis. It
>> compiles and runs 400+ unit test cases and 2 (503.bwaves_r and
>> 548.exchange2_r) SPEC CPU 2017 Fortran benchmarks.
>>
>> Major supported features inlcudes:
>> 1. Nested do, do-while, where, select-case, forall, implied-do constructs,
>> 2. Handling/Expanding Array Section expressions, Array constructors,
>> 3. IO Handling: File read/write with basic Formatting support.
>> 4. Support for around 40 Fortran Intrinsics like transpose, reshape, min,
>> max, sum, etc
>> 5. Nested Functions/ Module/ Subroutines.
>> 6. Derived types are partially supported(WIP)
>> 7. Dynamic memory handling (allocate statement) using malloc/free.
>> 8. Very basic Debugging / TBAA support.
>>
>> LLVM code generated is fairly optimized. The performance in SPEC becnhmarks
>> are comparable(better in few cases) to flang and gfortran compilers in both
>> speed and rate runs.
>>
>> Feedback/ comments are welcome.
>>
>> Thanks,
>> Prashantha N.R.
>> Compiler Tree Technologies
>>
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