-# WIP Cranelift codegen backend for rust
+# Cranelift codegen backend for rust
-> ⚠⚠⚠ Certain kinds of FFI don't work yet. ⚠⚠⚠
-
-The goal of this project is to create an alternative codegen backend for the rust compiler based on [Cranelift](https://github.com/bytecodealliance/wasmtime/blob/master/cranelift). This has the potential to improve compilation times in debug mode. If your project doesn't use any of the things listed under "Not yet supported", it should work fine. If not please open an issue.
+The goal of this project is to create an alternative codegen backend for the rust compiler based on [Cranelift](https://github.com/bytecodealliance/wasmtime/blob/main/cranelift).
+This has the potential to improve compilation times in debug mode.
+If your project doesn't use any of the things listed under "Not yet supported", it should work fine.
+If not please open an issue.
## Building and testing
```bash
$ git clone https://github.com/bjorn3/rustc_codegen_cranelift.git
$ cd rustc_codegen_cranelift
-$ ./prepare.sh # download and patch sysroot src and install hyperfine for benchmarking
-$ ./test.sh --release
+$ ./y.rs prepare # download and patch sysroot src and install hyperfine for benchmarking
+$ ./y.rs build
```
-If you want to only build but not test you should replace the last command with:
+To run the test suite replace the last command with:
```bash
-$ cargo build --release
-$ ./build_sysroot/build_sysroot.sh
+$ ./test.sh
```
-## Usage
-
-rustc_codegen_cranelift can be used as a near-drop-in replacement for `cargo build` or `cargo run` for existing projects.
-
-Assuming `$cg_clif_dir` is the directory you cloned this repo into and you followed the instructions (`prepare.sh` and `test.sh`).
-
-### Cargo
+This will implicitly build cg_clif too. Both `y.rs build` and `test.sh` accept a `--debug` argument to
+build in debug mode.
-In the directory with your project (where you can do the usual `cargo build`), run:
+Alternatively you can download a pre built version from [GHA]. It is listed in the artifacts section
+of workflow runs. Unfortunately due to GHA restrictions you need to be logged in to access it.
-```bash
-$ $cg_clif_dir/cargo.sh run
-```
+[GHA]: https://github.com/bjorn3/rustc_codegen_cranelift/actions?query=branch%3Amaster+event%3Apush+is%3Asuccess
-This should build and run your project with rustc_codegen_cranelift instead of the usual LLVM backend.
+## Usage
-If you compiled cg_clif in debug mode (aka you didn't pass `--release` to `./test.sh`) you should set `CHANNEL="debug"`.
+rustc_codegen_cranelift can be used as a near-drop-in replacement for `cargo build` or `cargo run` for existing projects.
-### Rustc
+Assuming `$cg_clif_dir` is the directory you cloned this repo into and you followed the instructions (`y.rs prepare` and `y.rs build` or `test.sh`).
-> You should prefer using the Cargo method.
+In the directory with your project (where you can do the usual `cargo build`), run:
```bash
-$ $cg_clif_dir/target/release/cg_clif my_crate.rs
+$ $cg_clif_dir/build/cargo build
```
-### Jit mode
+This will build your project with rustc_codegen_cranelift instead of the usual LLVM backend.
-In jit mode cg_clif will immediately execute your code without creating an executable file.
+For additional ways to use rustc_codegen_cranelift like the JIT mode see [usage.md](docs/usage.md).
-> This requires all dependencies to be available as dynamic library.
-> The jit mode will probably need cargo integration to make this possible.
+## Configuration
-```bash
-$ $cg_clif_dir/cargo.sh jit
-```
+See the documentation on the `BackendConfig` struct in [config.rs](src/config.rs) for all
+configuration options.
-or
-
-```bash
-$ $cg_clif_dir/target/release/cg_clif --jit my_crate.rs
-```
-
-### Shell
-
-These are a few functions that allow you to easily run rust code from the shell using cg_clif as jit.
+## Not yet supported
-```bash
-function jit_naked() {
- echo "$@" | $cg_clif_dir/target/release/cg_clif - --jit
-}
+* Inline assembly ([no cranelift support](https://github.com/bytecodealliance/wasmtime/issues/1041))
+ * On Linux there is support for invoking an external assembler for `global_asm!` and `asm!`.
+ `llvm_asm!` will remain unimplemented forever. `asm!` doesn't yet support reg classes. You
+ have to specify specific registers instead.
+* SIMD ([tracked here](https://github.com/bjorn3/rustc_codegen_cranelift/issues/171), some basic things work)
-function jit() {
- jit_naked "fn main() { $@ }"
-}
+## License
-function jit_calc() {
- jit 'println!("0x{:x}", ' $@ ');';
-}
-```
+Licensed under either of
-## Env vars
+ * Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
+ http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+ http://opensource.org/licenses/MIT)
-[see env_vars.md](docs/env_vars.md)
+at your option.
-## Not yet supported
+### Contribution
-* Good non-rust abi support ([several problems](https://github.com/bjorn3/rustc_codegen_cranelift/issues/10))
-* Inline assembly ([no cranelift support](https://github.com/bytecodealliance/wasmtime/issues/1041)
- * On Linux there is support for invoking an external assembler for `global_asm!` and `asm!`.
- `llvm_asm!` will remain unimplemented forever. `asm!` doesn't yet support reg classes. You
- have to specify specific registers instead.
-* SIMD ([tracked here](https://github.com/bjorn3/rustc_codegen_cranelift/issues/171), some basic things work)
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you shall be dual licensed as above, without any
+additional terms or conditions.
projects / rust.git / blobdiff