# mir2wasm

**Repository Path**: mirrors_kripken/mir2wasm

## Basic Information

- **Project Name**: mir2wasm
- **Description**: An experimental compiler from Rust to WebAssembly
- **Primary Language**: Unknown
- **License**: Apache-2.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-10-22
- **Last Updated**: 2026-05-17

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# mir2wasm

An experimental compiler from [Rust] to [WebAssembly], based on rustc + Rust [MIR].

**This doesn't do anything useful yet.**

## Hacking notes

I recommend that you install [rustup] and then use it to
install the current rustc nightly version:

```sh
git clone https://github.com/brson/mir2wasm.git
cd mir2wasm
rustup override set nightly
```

```sh
cargo build
```

```sh
cargo run -q -- rust-examples/nocore-hello-world.rs
```

Do println debugging with `debug!` so it goes to stderr and print it like:

```
RUST_LOG=mir2wasm cargo run -q -- rust-examples/nocore-hello-world.rs
```

```
rustc -Z unstable-options --unpretty=mir rust-examples/nocore-hello-world.rs
```

[rustc docs](https://manishearth.github.io/rust-internals-docs/rustc/index.html).

Plug this stuff into a wast file to print something:

```
  (import $print_i32 "spectest" "print" (param i32))
  (export "foo" $foo)
...
    (call_import $print_i32 (get_local $1))
```

## License

Licensed under either of
  * 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) at your option.

### Contribution

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.

[Rust]: https://www.rust-lang.org/
[WebAssembly]: https://webassembly.github.io/
[MIR]: https://github.com/rust-lang/rfcs/blob/master/text/1211-mir.md
[rustup]: https://www.rustup.rs