espressif

llvm-project

LLVM2020–2025

espressif / llvm-project

llvm-project

Fork of LLVM with Xtensa specific patches. To be upstreamed.

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7Distinct people

8Mentions

0Explicit recommenders

291GitHub stars

REPOSITORY AT A GLANCE

What to know before exploring

What it is

Fork of LLVM with Xtensa specific patches. To be upstreamed.

GitHub

Where it is used

No documented product use was verified in the last source check.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

llvm/llvm-project · linked in 2 of the same discussions

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year8 dated mentions

Observed mentions: 2020-09-10 07:52:13 UTC to 2025-10-04 05:26:48 UTC.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges

UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
Period	Start (UTC)	End (exclusive, UTC)	Mentions	Comments
2020	2020-01-01 00:00:00 UTC	2021-01-01 00:00:00 UTC	1	1
2021	2021-01-01 00:00:00 UTC	2022-01-01 00:00:00 UTC	2	2
2022	2022-01-01 00:00:00 UTC	2023-01-01 00:00:00 UTC	1	1
2023	2023-01-01 00:00:00 UTC	2024-01-01 00:00:00 UTC	3	3
2024	2024-01-01 00:00:00 UTC	2025-01-01 00:00:00 UTC	0	0
2025	2025-01-01 00:00:00 UTC	2026-01-01 00:00:00 UTC	1	1

What Hacker News says

8 sources

almostgotcaught·Oct 4, 2025

https://github.com/intel/llvm https://github.com/iree-org/llvm-project https://github.com/ROCm/llvm-project https://github.com/apple/swift-llvm https://github.com/dotnet/llvm-project https://github.com/espressif/llvm-project should i keep going?

In Zig builds are getting faster

weitzj·Mar 19, 2023

Edit: More discussions: https://github.com/espressif/llvm-project/issues/4#issuecomm... Llvm is here: https://github.com/llvm/llvm-project/tree/release/16.x/llvm/... But I don’t know if there should be lld as well…

In LLVM 16.0.0 Release

weitzj·Mar 18, 2023

Xtensa support (esp32). Will be interesting how this will be for Rust and Zig support for esp32 https://github.com/llvm/llvm-project/tree/main/llvm/lib/Targ... https://www.phoronix.com/news/LLVM-Xtensa-Backend https://github.com/espressif/llvm-project/issues/4#issuecomm... https://github.com/ziglang/zig/issues/5467#issuecomment-1465...

In LLVM 16.0.0 Release

MuffinFlavored·Feb 25, 2023

> At this point, I'd also like to make it clear that you do not need the forked compiler for our RISC-V-based chips, esp32c2, esp32c3, esp32c6 etc. You only need the forked compiler for our Xtensa-based chips, esp32, esp32s2 & esp32s3. Would be cool to see the list (and amount) of pending changes required. https://discourse.llvm.org/u/andreisfr/summary This is about as much as I can find. https://github.com/espressif/llvm-project/pull/62

In Rust on Espressif chips – 2023 Roadmap

alhirzel·May 23, 2022

This is very promising for embedded control applications. Bootstrapping this with a simple allocator and even something as basic as FreeRTOS [1] combined with CBinding.jl [2] for portability would be game-changing for many applications, and directly compete with e.g. MathWorks' Arduino Simulink target [3]. ESP8266/32 next, once LLVM support [4] lands? [1]: https://microcontrollerslab.com/use-freertos-arduino/ [2]: https://github.com/analytech-solutions/CBinding.jl [3]: https://www.mathworks.com/help/supportpkg/arduino/run-on-tar... [4]: https://github.com/espressif/llvm-project

In Running Julia bare-metal on an Arduino

wavesquid·Sep 3, 2021

They're almost up to date with LLVM: https://github.com/espressif/llvm-project/

In Tomu – An ARM microprocessor which fits in your USB port

d110af5ccf·May 6, 2021

Just to clarify - Gambit, Chicken, and Carp all compile to portable C. I hadn't realized LLVM mainline doesn't support Xtensa. I'm surprised. D does support Xtensa via LDC (https://forum.dlang.org/thread/rpdwiusbevvphqyvjhdj@forum.dl...). It looks like GDC also nearly supports it, requiring only a minor patch at present. A functioning LLVM backend does exist (https://github.com/espressif/llvm-project/issues/4) and appears to be making very slow progress towards being merged. A quick search shows that it works for Rust. I suspect (but don't know) that it might work for Terra as well. There's also the LLVM C backend (https://github.com/JuliaComputingOSS/llvm-cbe) but I've no idea how efficient such an approach is when applied to real world embedded tasks.

In uLisp

throwaway9d0291·Sep 10, 2020

I think Espressif takes software fairly seriously, I really like ESP-IDF. As for Rust support, they're working on adding Xtensa support to LLVM [0] and someone has used it to build Rust [1]. It's not official support for Rust but it's official support for LLVM upon which Rust is based, which works too. [0]: https://github.com/espressif/llvm-project [1]: https://github.com/MabezDev/rust-xtensa

In The amazing $1 microcontroller (2017)