go.vm
qbe-rs
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go.vm | qbe-rs | |
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1 | 29 | |
309 | 64 | |
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1.8 | 3.3 | |
almost 2 years ago | 8 months ago | |
Go | Rust | |
GNU General Public License v3.0 only | GNU General Public License v3.0 or later |
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go.vm
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New Assembly Like Programming Language?
You might find something interesting if you were to look at virtual-machines - many are used for implementing scripting-languages, so while you'd not be writing assembly-code, you'd be writing "bytecode" programs.
You could write bytecode for Lua, or bytecode for Python for example.
I had a fun few weeks writing a simple virtual-machine, and a "compiler" which turns a simple assembly-language-like input into bytecodes which are then interpreted:
https://github.com/skx/go.vm/
Other examples, along with lua/python which were already mentioned, might include "Writing a compiler in go" this turns a scripting-language into a set of opcodes which a VM executes:
* https://compilerbook.com/
qbe-rs
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Odin Programming Language
> I think it uses a different backend than LLVM
harec uses https://c9x.me/compile/
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Frontend for GCC?
Have you considered QBE?
- QBE – Compiler Back End
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What do C programmers think of the Zig language in 2023?
I really hope other new projects (like QBE) can really grow and become widely used
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Toy C compiler, worth having an IR stage?
I really liked targetting QBE (https://c9x.me/compile/) as an IR, as it gave me lots of back-end optimisations for free 😊.
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C or LLVM for a fast backend?
There is: QBE.
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A whirlwind tour of the LLVM optimizer
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
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Made my first LLVM front-end… Now what?
You can try buildling you own backend like llvm. A good example or starting point is probably QBE since it is extremely small but very functional.
- Best book on writing an optimizing compiler (inlining, types, abstract interpretation)?
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Rust port of B3 from WebKit, LLVM-like backend
How big is the whole backend? I've heard that it is small but I wanted to compare it to QBE which is around 8 KLoC and it is quite interesting too.
What are some alternatives?
vsock - Package vsock provides access to Linux VM sockets (AF_VSOCK) for communication between a hypervisor and its virtual machines. MIT Licensed.
ubpf - Userspace eBPF VM
well - The Future of Assembly Language. https://wellang.github.io/well/
minivm - A VM That is Dynamic and Fast
corpus - The definitive collection of interpreters, compilers, and programs for the Whitespace programming language.
mir - A lightweight JIT compiler based on MIR (Medium Internal Representation) and C11 JIT compiler and interpreter based on MIR
Gentee script programming language - Gentee - script programming language for automation. It uses VM and compiler written in Go (Golang).
wasmtime - A fast and secure runtime for WebAssembly
yaegi - Yaegi is Another Elegant Go Interpreter
Befunge - lang befunge 93 fast
The uGO Language - Script Language for Go
c4 - C in four functions