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Top 23 C++ Compiler Projects
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carbon-lang
Carbon Language's main repository: documents, design, implementation, and related tools. (NOTE: Carbon Language is experimental; see README)
Project mention: Kickstart insight needed: A new retrofitted C dialect? | news.ycombinator.com | 2025-02-22Kind of along these lines but for C++: https://docs.carbon-lang.dev/
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It's a bit hard to do comparisons without going into threat models and all that _fun_ stuff :shrug:
For example, JS runs in almost every browser on earth too, yet it took V8 devs 2 years to find out that `Math.expm1()` could return -0.0 (https://chromium.googlesource.com/v8/v8.git/+/56f7dda67fdc97...). This is a cherry-picked example, and JS is clearly more complex than WASM, but still.
Just because stuff runs on a lot of devices doesn't mean it's more or less secure.
Linux runs on quite a few devices too, yet we still find bugs, people still don't ship updates to said bugs, yadda yadda yadda.
My point is just that lots of devs often skip the threat modeling and just think "I'll slap it in a WASM thingie an it'll be fine". Well good luck.
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Project mention: CubeCL: GPU Kernels in Rust for CUDA, ROCm, and WGPU | news.ycombinator.com | 2025-04-23
This reminds me of Halide (https://halide-lang.org/).
In Halide, the concept was great, yet the problems in kernel development were moved to the side of "scheduling", i.e. determining tiling/vectorization/parallellization for the kernel runs.
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Project mention: Book – Writing a C Compiler: Build a Real Programming Language from Scratch | news.ycombinator.com | 2024-08-15
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glslang
Khronos-reference front end for GLSL/ESSL, partial front end for HLSL, and a SPIR-V generator.
Newer editions of Computer Organization and Design: The Hardware Software Interface covers GPUs [1]
Multiflow still has some relevant ideas [2]
Programming on Parallel Machines: GPU, Multicore, Clusters and More. Gives you a look at some of the issues [3]
SPIRV-VM is a virtual machine for executing SPIR-V shaders [4]
NyuziRaster: Optimizing Rasterizer Performance and Energy in the Nyuzi Open Source GPU [5]
Ocelot is a modular dynamic compilation framework for heterogeneous systems, providing various backend targets for CUDA programs and analysis modules for the PTX virtual instruction set. [6]
glslang is the Khronos-reference front end for GLSL/ESSL, partial front end for HLSL, and a SPIR-V generator.
[1]: https://www.goodreads.com/book/show/83895.Computer_Organizat...
[2]: https://en.wikipedia.org/wiki/Multiflow
[3]: http://heather.cs.ucdavis.edu/parprocbook
[4]: https://github.com/dfranx/SPIRV-VM
[5]: https://www.cs.binghamton.edu/~millerti/nyuziraster.pdf
[6]:https://code.google.com/archive/p/gpuocelot/
[7]: https://github.com/KhronosGroup/glslang
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Project mention: Ask HN: What Are You Working On? (February 2025) | news.ycombinator.com | 2025-02-23
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Project mention: Ask HN: What less-popular systems programming language are you using? | news.ycombinator.com | 2025-03-01
Lately I've been using: https://janet-lang.org/ It's not a systems programming language, but it can be embedded in C.
https://jank-lang.org/ looks interesting to me --I have not tried it yet. I'm not sure if this language could qualify as a systems programming language. What do you think?
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ShaderConductor
ShaderConductor is a tool designed for cross-compiling HLSL to other shading languages
I think this is the way forward for shading languages.
I'm writing a simple renderer with an OpenGL, Metal and Vulkan backend. I avoid using any shader transpiler such as Microsoft's ShaderConductor [0], as this adds a huge dependency to the project. As a hacky solution I'm simply maintaining a copy for each shading language (Metal Shading Language, GLSL, etc.). For a focused non-gaming project that seems easier.
However, having a compiler that compiles a subset of the programming language I'm using for a project (such as Rust or C++) to the individual shading languages, sounds amazing, and would make shader writing when not using a game engine more joyful.
[0] https://github.com/microsoft/ShaderConductor
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AdaptiveCpp
Compiler for multiple programming models (SYCL, C++ standard parallelism, HIP/CUDA) for CPUs and GPUs from all vendors: The independent, community-driven compiler for C++-based heterogeneous programming models. Lets applications adapt themselves to all the hardware in the system - even at runtime!
Project mention: AdaptiveCpp – Implementation of SYCL and C++ Parallelism for CPUs and GPUs | news.ycombinator.com | 2025-01-02 -
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torch-mlir
The Torch-MLIR project aims to provide first class support from the PyTorch ecosystem to the MLIR ecosystem.
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C++ Compiler discussion
C++ Compiler related posts
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Hidden Classes and Inline Caches in V8
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Purely Functional Sliding Window Aggregation Algorithm
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TinyCompiler: A Compiler in a Week-End
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Compiling Array Languages for SIMD [pdf]
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Nocc – A Distributed C++ Compiler
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The Jank Programming Language
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Jank: A native Clojure dialect hosted on LLVM with C++ interop
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Index
What are some of the best open-source Compiler projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | carbon-lang | 32,813 |
| 2 | V8 | 24,019 |
| 3 | Halide | 6,034 |
| 4 | reshade | 4,483 |
| 5 | asmjit | 4,127 |
| 6 | fully-homomorphic-encryption | 3,563 |
| 7 | glslang | 3,245 |
| 8 | iree | 3,107 |
| 9 | faust | 2,713 |
| 10 | ispc | 2,645 |
| 11 | gccrs | 2,612 |
| 12 | Beef | 2,613 |
| 13 | jank | 2,493 |
| 14 | ccache | 2,450 |
| 15 | mrustc | 2,283 |
| 16 | shaderc | 1,947 |
| 17 | ShaderConductor | 1,806 |
| 18 | AdaptiveCpp | 1,604 |
| 19 | lpython | 1,551 |
| 20 | torch-mlir | 1,506 |
| 21 | fetlang | 1,494 |
| 22 | kphp | 1,419 |
| 23 | VTIL-Core | 1,372 |
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