Cwerg
tinycc
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Cwerg | tinycc | |
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59 | 15 | |
396 | 1,805 | |
- | 2.8% | |
9.7 | 8.9 | |
11 days ago | 1 day ago | |
Python | C | |
Apache License 2.0 | GNU Lesser General Public License v3.0 only |
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Cwerg
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Cwerg: C-like language that can be implemented in 10kLOC
Perhaps these have already been dealt with and I'm missing critical information. If so, my apologies. Great work, in any case.
[1] https://github.com/robertmuth/Cwerg/tree/master/FrontEnd#dis...
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Where can I find resources and guides on how to build compiler backends?
Cwerg has backend that can be used as JIT and is written with readability in mind. Additional documentation can be found here: https://github.com/robertmuth/Cwerg/tree/master/Docs
- Most important language features not touched in the book "Crafting Interpreters"?
- Lack of resources in creating Assemblers from scratch.
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Minimum ISA Capabilities to Support Most (Non-Interactive) Programs?
I defined a basic ISA-like IR for Cwerg. It has unlimited registers and no constraints on immediates.
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How do you design a compiler and a language?
entire compiler front end ast nodes
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Syntax Design
I was also going down the path of bike shedding concrete syntax for my language Cwerg before pulling the plug on that effort and just using s-exprs. I managed to make the s-expr quite succinct by carefully choosing the order of arguments so I can omit optional ones. Also very helpful was to use square brackets for list, e.g. (call fun-name [arg1 arg2]). This simplifies parsing a little bit and is easier on the eye. Here are some Code Examples
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November 2022 monthly "What are you working on?" thread
I am iterating over the languages features for Cwerg's Frontend which aims to be a low level language with about the complexity of C but with some of the comforts of modern languages. I am especially happy with the choice of adding sum types. Relative to C the current feature set looks like this: Removed: * arrays decay to pointers * bitfields * separate compilation (more of a backend issue) * pre-processor * varargs * implcit type conversions * (untagged) unions * ++/-- * comma operator * implicitly nullable pointers * goto
- typed asts and codegen
- Features Compendium
tinycc
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Autoconf makes me think we stopped evolving too soon
A better solution is just to write a plain ass shell script that tests if various C snippets compile.
https://github.com/oilshell/oil/blob/master/configure
https://github.com/oilshell/oil/blob/master/build/detect-pwe...
Not an unholy mix of m4, shell, and C, all in the same file.
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These are the same style as a the configure scripts that Fabrice Bellard wrote for tcc and QEMU.
They are plain ass shell scripts, because he actually understands the code he writes.
https://github.com/qemu/qemu/blob/master/configure
https://github.com/TinyCC/tinycc/blob/mob/configure
OCaml’s configure script is also “normal”.
You don’t have to copy and paste thousands of lines of GNU stuff that you don’t understand.
(copy of lobste.rs comment)
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AST vs. Bytecode: Interpreters in the Age of Meta-Compilation [pdf]
I can highly recommend libtcc (https://github.com/TinyCC/tinycc.git) for this kind of thing. I recently ported the code developed in linux on an ARM chromebook to a generic windows box in 20 minutes.
- Are there faster alternatives to GCC and Clang for C?
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Offensive Nim
I think it's a pretty nice prog.lang. You may be very happy. Though nothing is perfect, there is much to recommend it. By now I've written over 150 command-line tools with https://github.com/c-blake/cligen . A few are at https://github.com/c-blake/bu or https://github.com/c-blake/nio (screw 1970s COBOL-esque SQL) or in their own repos.
If it helps, I like to use the "mob branch" [0] of TinyCC/tcc [1] for really fast builds in debugging mode, but this may only work if you toss `@if tcc: mm:markAndSweep @end` or similar in your nim.cfg. Then I have a little `@if r: ...` so I can say `nim c -d:r foo` for a release build with gcc/whatever.
[0] https://repo.or.cz/w/tinycc.git
[1] https://en.wikipedia.org/wiki/Tiny_C_Compiler
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Bringing a dynamic environment to C: My linker project
I have found the libtcc from https://github.com/TinyCC/tinycc to be absolutely fantastic. I'm using it to instantaneously compile the C output from my hobby language to create a repl. Once I had the compiler in good shape it allowed me to create a 100% compatible interpreter for (basically) free.
The libtcc API is minimal. For my needs that has been 100% sufficient and a pleasure to work with.
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tcc on RasPi, func pointers to standard functions are nil
The latest version that people are working with can be found on the 'mob' branch at https://repo.or.cz/w/tinycc.git
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Optimizing GoAWK with a bytecode compiler and virtual machine
Instead of interpreters, if one has less of a "must be a full featured prog.lang" mentality and a fast compiler like Go or Nim [1] (or is willing to wait, for slow optimizing compiles to apply against big data sets) then an end-to-end simpler design for "one-liners" (or similarly simple programs) is the whole program generator. Maybe "big IFs", but also maybe not.
To back up my simplicity claim, consider rp [2] -- like 60 non-comment/import/signature lines of code for the generator. Generated programs are even smaller. But, you can deploy gcc or clang or whatever against them and make fast libraries in the host language.
Why, if you are willing to write those little generation command options in C99 then you can compile the harness with tcc [3] in about 1 millisecond which is faster than most interpreter start-up times - byte code or otherwise - and can link against gcc -O3 (or whatever) helper libraries.
Anyway, I only write this because in my experience few people realize how much development cost they buy into when then insist on a full featured prog.lang, not to criticize Ben's work. You also make users need to learn quirks of that new language instead of the quirks of a "harness" which may be fewer.
[1] https://forum.nim-lang.org/
[2] https://github.com/c-blake/cligen/blob/master/examples/rp.ni...
[3] https://repo.or.cz/w/tinycc.git
- What's the best portfolio project that you have ever seen?
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CHICKEN 5.3.0 has been released
I think it is. At least there have been some recent activity in https://repo.or.cz/w/tinycc.git
- Cwerg - an opinionated, light-weight compiler backend
What are some alternatives?
mir - A lightweight JIT compiler based on MIR (Medium Internal Representation) and C11 JIT compiler and interpreter based on MIR
v - Simple, fast, safe, compiled language for developing maintainable software. Compiles itself in <1s with zero library dependencies. Supports automatic C => V translation. https://vlang.io
asmjit - Low-latency machine code generation
pvsneslib - PVSnesLib : A small, open and free development kit for the Nintendo SNES
bluebird - A work-in-progess programming language modeled after Ada and C++
c2nim - c2nim is a tool to translate Ansi C code to Nim. The output is human-readable Nim code that is meant to be tweaked by hand before and after the translation process.
konna - A fast functional language based on two level type theory
nimterop - Nimterop is a Nim package that aims to make C/C++ interop seamless
boring-lang - A very boring programming language
cligen - Nim library to infer/generate command-line-interfaces / option / argument parsing; Docs at
asmdb - Instructions database and utilities for X86/X64 and ARM (THUMB/A32/A64) architectures.
nimforum - Lightweight alternative to Discourse written in Nim