"LLVM's Fortran Compiler "Flang" Makes Significant Progress But Not Yet Production Ready"

[Lynn McGuire]

"LLVM's Fortran Compiler "Flang" Makes Significant Progress But Not Yet
Production Ready"
https://www.phoronix.com/news/LLVM-Flang-Early-2023

"Flang can produce working executables but isn't yet deemed ready for
production-use, Fortran 95 support is mostly in place, Fortran 2003 and
newer features are a work-in-progress, and testing of the Flang support
continues to take place across a variety of Fortran software."

Flang is also claimed to be Fortran 77 complete. And 1.5X the speed of
GFortran 12 generated code using the SPEC benchmarks.

Lynn

[Thomas Koenig]

Lynn McGuire <lynnmc...@gmail.com> schrieb:

That's one of the unverifiable claims because SPEC is closed source :-|

[gah4]

On Monday, February 13, 2023 at 9:53:44 PM UTC-8, Thomas Koenig wrote:

(snip)

> That's one of the unverifiable claims because SPEC is closed source :-|

The programs that go into SPEC are open, but the exact way they are used
might not be.

In any case, SPEC doesn't allow claims other than the official measurements.

[Kiran Chandramohan]

Sorry, for the misunderstanding here. The figures show the runtime and should be interpreted as LLVM Flang compiled code takes 1.5x the time of gfortran. We were over 2X a few months back, so we are catching up.