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https://github.com/brandonki/jcc
Optimizing C Compiler
https://github.com/brandonki/jcc
c-lang c-language compiler cpp low-level optimization ssa x86-64
Last synced: about 10 hours ago
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Optimizing C Compiler
- Host: GitHub
- URL: https://github.com/brandonki/jcc
- Owner: BrandonKi
- License: mit
- Created: 2024-04-19T22:52:25.000Z (5 months ago)
- Default Branch: main
- Last Pushed: 2024-09-22T01:48:22.000Z (3 days ago)
- Last Synced: 2024-09-24T21:17:01.931Z (about 15 hours ago)
- Topics: c-lang, c-language, compiler, cpp, low-level, optimization, ssa, x86-64
- Language: C++
- Homepage:
- Size: 294 KB
- Stars: 5
- Watchers: 1
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Just a C Compiler (jcc)
C Compiler.
Can use either the custom backend or llvm.
The custom backend is located in [jb/](jb/) which was previously a separate project([jb](https://github.com/BrandonKi/just-another-backend)).
## Examples
WIP, can currently handle a decent amount of stuff (functions, pointers, if/else, for, do/while, etc.). It even supports a decent amount of preprocessor features so far.
Take a look in the [tests/](tests/) directory or commit history for a fuller picture of how much is supported.
The following is a very small example that correctly runs/compiles.
```c
#include
extern int printf(char*);
bool isPerfect(int num) {
int sum = 0;
for (int i = 1; i < num; i++) {
if (num % i == 0) {
sum += i;
}
}
return sum == num;
}
int main() {
printf("Hello From JCC!");
return isPerfect(28); // returns 1
}
```
## Spec/Reference
[C Spec](https://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf)
[C preprocessor](https://www.spinellis.gr/blog/20060626/cpp.algo.pdf)
[Intel x86_64 Instruction set](https://www.intel.com/content/www/us/en/developer/articles/technical/intel-sdm.html)
## Build
Replace `CMAKE_PREFIX_PATH` with your `path/to/llvm`
## Build(Visual Studio)
```cmake
cmake "-DCMAKE_PREFIX_PATH:STRING=C:/Program Files/llvm-16.0.6-windows-amd64-msvc16-msvcrt-dbg" -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE -B/build -G "Visual Studio 17 2022"
```
## Build(Clang+Ninja)
```cmake
cmake "-DCMAKE_PREFIX_PATH:STRING=C:/Program Files/llvm-16.0.6-windows-amd64-msvc16-msvcrt-dbg" -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE -B/build -GNinja
```