qbe-rs VS c4

Compare qbe-rs vs c4 and see what are their differences.

qbe-rs

QBE IR in natural Rust data structures (by garritfra)
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qbe-rs c4
32 11
70 9,527
- -
3.3 0.0
11 months ago 7 months ago
Rust C
GNU General Public License v3.0 or later GNU General Public License v3.0 only
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

qbe-rs

Posts with mentions or reviews of qbe-rs. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-05-13.
  • QBE – Compiler Back End
    2 projects | news.ycombinator.com | 13 May 2024
    1 project | news.ycombinator.com | 15 Sep 2023
  • Ask HN: LLVM versus WASM?
    1 project | news.ycombinator.com | 12 May 2024
    There is likely no general anwer to this question. LLVM and WASM are sufficiently different technologies for different purposes. The original purpose of WASM was to enable code of statically compiled languages like C++ or Rust to run in the browser, whereas LLVM is a huge framework mostly useful as a compiler backend for a multitude of architectures. I'm aware that WASM is more and more used as a general purpose managed runtime (like the .NET ECMA-335 Common Language Infrastructure). And don't forget that there are much leaner, but still decent alternatives to LLVM, such as QBE (https://c9x.me/compile/) or ECS (https://github.com/EigenCompilerSuite/). So the answer to your question heavily depends on what you actually want to implement.
  • CBMC: C bounded model checker. (2021)
    3 projects | news.ycombinator.com | 4 May 2024
    Another problem with LLVM I’ve heard about is that it’s intermediate language or API or something is a moving, informally-specified target. People who know LLVM internals might weigh in on that claim. If true, it’s actually easier to target C or a subset of Rust just because it’s static and well-understood.

    Two projects sought to mitigate these issues by going in different directions. One was a compiler backend that aimed to be easy to learn with well-specified IL. The other aimed to formalize LLVM’s IL.

    http://c9x.me/compile/

    https://github.com/AliveToolkit/alive2

    There have also been typed, assembly languages to support verification from groups like FLINT. One can also compile language-specific analysis with a certified to LLVM IL compiler. Integrating pieces from different languages can have risks. That (IIRC) is being mitigated by people doing secure, abstract compilation.

  • Odin Programming Language
    23 projects | news.ycombinator.com | 1 Jan 2024
    > I think it uses a different backend than LLVM

    harec uses https://c9x.me/compile/

  • Frontend for GCC?
    3 projects | /r/ProgrammingLanguages | 6 Dec 2023
    Have you considered QBE?
  • What do C programmers think of the Zig language in 2023?
    1 project | /r/C_Programming | 4 Jul 2023
    I really hope other new projects (like QBE) can really grow and become widely used
  • Toy C compiler, worth having an IR stage?
    2 projects | /r/Compilers | 1 Jul 2023
    I really liked targetting QBE (https://c9x.me/compile/) as an IR, as it gave me lots of back-end optimisations for free 😊.
  • C or LLVM for a fast backend?
    3 projects | /r/ProgrammingLanguages | 2 Jun 2023
    There is: QBE.
  • A whirlwind tour of the LLVM optimizer
    1 project | news.ycombinator.com | 12 May 2023
    You might be underestimating the accuracy of the CPU models LLVM uses.

    For x86, the same data the code generator uses drives llvm-mca[1], which given a loop body can tell you the throughput, latency, and microarchitectural bottlenecks (decoding, ports, dependencies, store forwarding, etc.)—if not always precisely, then still not worse then IACA, the tool written at Intel by people who presumably knew how the CPUs work, unlike LLVM contributors and the rest of us who can only guess and measure. This separately for Haswell, Sandy Bridge, Skylake, etc.; not “x86”.

    Now, is this the best model you can get? Not exactly[2], but it’s close enough to not matter. Do we often need machine code to be optimized to that level of detail? Perhaps not[3], and with that in mind you can shave at least a factor of ten off LLVM’s considerable bulk at the cost of 20—30% of performance[4,5]. But if you do want those as well, it seems that the complexity of LLVM is a fair price, or has the right order of magnitude at least.

    (Frontend not included, C++ frontend required to bootstrap sold separately, at a similar markup compared to a C-only frontend with somewhat worse ergonomics.)

    [1] https://llvm.org/docs/CommandGuide/llvm-mca.html

    [2] https://www.uops.info/

    [3] https://briancallahan.net/blog/20211010.html

    [4] https://c9x.me/compile/

    [5] https://drewdevault.com/talks/qbe.html

c4

Posts with mentions or reviews of c4. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-01-06.

What are some alternatives?

When comparing qbe-rs and c4 you can also consider the following projects:

mir - A lightweight JIT compiler based on MIR (Medium Internal Representation) and C11 JIT compiler and interpreter based on MIR

stage0 - A set of minimal dependency bootstrap binaries

ubpf - Userspace eBPF VM

bcompiler - Mirror of http://www.rano.org/bcompiler.tar.gz, with a bootstrap script

minivm - A VM That is Dynamic and Fast

libcperciva - BSD-licensed C99/POSIX library code shared between tarsnap, scrypt, kivaloo, spiped, and bsdiff.

well - The Future of Assembly Language. https://wellang.github.io/well/

fpga_craft - A voxel game/Minecraft clone for the iCE40 UP5K FPGA

wasmtime - A fast and secure runtime for WebAssembly

packedjson - packedjson is an alternative Nim implementation for JSON. The JSON is essentially kept as a single string in order to save memory over a more traditional tree representation.

Som - Parser, code model, navigable browser and VM for the SOM Smalltalk dialect

cproc - C11 compiler (mirror)

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