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bjorn3 2019-01-26 17:03:35 +01:00
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@ -7,29 +7,29 @@
```bash
$ git clone https://github.com/bjorn3/rustc_codegen_cranelift.git
$ cd rustc_codegen_cranelift
$ rustup override set nightly # This uses unstable api's which will never be stabilized
$ cargo install xargo # Used for building the sysroot
$ cargo install hyperfine # Used for benchmarking in build.sh
$ cargo build
$ ./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
```bash
$ rustc -Zcodegen-backend=$(pwd)/target/debug/librustc_codegen_cranelift.so my_crate.rs
$ rustc -Cpanic=abort -Zcodegen-backend=$cg_clif_dir/target/debug/librustc_codegen_cranelift.so my_crate.rs
```
## Build sysroot and test
### Cargo
```bash
$ rustup component add rust-src # Make sure the sysroot source is available
$ ./prepare_libcore.sh # Patch the sysroot source for some not yet supported things
$ ./build.sh
$ 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 ([non scalars are not yet supported for the "C" abi](https://github.com/bjorn3/rustc_codegen_cranelift/issues/10))
* Good non-rust abi support ([scalar pair and vector are passed by-ref](https://github.com/bjorn3/rustc_codegen_cranelift/issues/10))
* Checked binops ([some missing instructions in cranelift](https://github.com/CraneStation/cranelift/issues/460))
* Inline assembly ([no cranelift support](https://github.com/CraneStation/cranelift/issues/444))
* Varargs ([no cranelift support](https://github.com/CraneStation/cranelift/issues/212))