| build_sysroot | ||
| example | ||
| patches | ||
| src | ||
| .gitignore | ||
| .travis.yml | ||
| abc.cpp | ||
| Cargo.lock | ||
| Cargo.toml | ||
| clean_all.sh | ||
| config.sh | ||
| copy.clif | ||
| flamegraph.sh | ||
| LICENSE-APACHE | ||
| LICENSE-MIT | ||
| prepare.sh | ||
| Readme.md | ||
| rust-toolchain | ||
| test.sh | ||
Work in progress cranelift codegen backend for rust
⚠⚠⚠ This doesn't do much useful yet ⚠⚠⚠
Building
$ git clone https://github.com/bjorn3/rustc_codegen_cranelift.git
$ cd rustc_codegen_cranelift
$ ./prepare.sh # downloads and patches sysroot src and installs hyperfine for benchmarking
$ ./test.sh
Usage
$cg_clif_dir is the directory you cloned this repo into in the following instruction.
Rustc
$ rustc -Cpanic=abort -Zcodegen-backend=$cg_clif_dir/target/debug/librustc_codegen_cranelift.so my_crate.rs
Cargo
$ RUSTFLAGS="-Cpanic=abort -Zcodegen-backend=$cg_clif_dir/target/debug/librustc_codegen_cranelift.dylib --sysroot $cg_clif_dir/build_sysroot/sysroot" cargo run
Not yet supported
- Good non-rust abi support (scalar pair and vector are passed by-ref)
- Checked binops (some missing instructions in cranelift)
- Inline assembly (no cranelift support)
- Varargs (no cranelift support)
- libstd (needs varargs and some other stuff) (tracked here)
- u128 and i128 (no cranelift support)
- SIMD (tracked here)
Troubleshooting
Can't compile
Try updating your nightly compiler. You can try to use an nightly a day or two older if updating rustc doesn't fix it. If you still can't compile it, please fill an issue.
error[E0463]: can't find crate for std while compiling a no_std crate
If you use RUSTFLAGS to pass -Zcodegen-backend to rustc, cargo will compile build-dependencies with those flags too. Because this project doesn't support libstd yet, that will result in an error. I don't know of any way to fix this. :(