rustc_codegen_gcc: Progress Report #9

What is rustc_codegen_gcc?

rustc_codegen_gcc is a GCC codegen for rustc, meaning that it can be loaded by the existing rustc frontend, but benefits from GCC by having more architectures supported and having access to GCC’s optimizations.

GCC patches status

No progress on the review of my GCC patches this month.

I did some work that will result in patches when they’re ready:

State of rustc_codegen_gcc

Here’s what has been done this month:

I also worked on SIMD support but this is not done yet. The gcc patch adding support for target-specific builtins mentioned above will also need more work.

UI tests progress

Here are the results of running the UI tests in the CI:

Category Last Month This Month Delta

Passed

4448

4542

+94

Failed

75

49

-26

For the next month, I’ll continue working on SIMD support.

How to contribute

rustc_codegen_gcc

If you want to help on the project itself, please do the following:

  1. Run the tests locally.

  2. Choose a test that fails.

  3. Investigate why it fails.

  4. Fix the problem.

Even if you can’t fix the problem, your investigation could help, so if you enjoy staring at assembly code, have fun!

Crates and rustc

If you would like to contribute on adding support for Rust on currently unsupported platforms, you can help by adding the support for those platforms in some crates like libc and object and also in the rust compiler itself.

Test this project

Otherwise, you can test this project on new platforms and also compare the assembly with LLVM to see if some optimization is missing.

Good first issue

Finally, another good way to help is to look at good first issues. Those are issues that should be easier to start with.

Thanks for your support!

I wanted to personally thank all the people that sponsor this project: your support is very much appreciated.

A special thanks to the following sponsors:

  • saethlin

  • embark-studios

  • Traverse-Research

  • Thomas Colliers

  • Shnatsel

A big thank you to bjorn3 for his help, contributions and reviews. And a big thank you to lqd and GuillaumeGomez for answering my questions about rustc’s internals. Another big thank you to Commeownist for his contributions.

Also, a big thank you to the rest of my sponsors:

  • kpp

  • 0x7CFE

  • repi

  • nevi-me

  • oleid

  • acshi

  • joshtriplett

  • djc

  • TimNN

  • sdroege

  • pcn

  • alanfalloon

  • steven-joruk

  • davidlattimore

  • Nehliin

  • colelawrence

  • zmanian

  • alexkirsz

  • regiontog

  • berkus

  • wezm

  • belzael

  • vincentdephily

  • mexus

  • jam1garner

  • Shoeboxam

  • evanrichter

  • stuhood

  • yerke

  • bes

  • raymanfx

  • seanpianka

  • srijs

  • kkysen

  • messense

  • riking

  • rafaelcaricio

  • Lemmih

  • memoryruins

  • pthariensflame

  • senden9

  • Hofer-Julian

  • robjtede

  • Jonas Platte

  • spike grobstein

  • Oliver Marshall

  • Sam Harrington

  • Jonas

  • Jeff Muizelaar

  • Chris Butler

  • sierrafiveseven

  • Joseph Garvin

  • icewind

  • Sebastian Zivota

  • Oskar Nehlin

  • Nicolas Barbier

  • Daniel

  • Justin Ossevoort

  • sstadick

  • luizirber

  • kiyoshigawa

  • robinmoussu

  • Daniel Sheehan

and a few others who preferred to stay anonymous.