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

This doesn't do anything useful yet.

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

Tested with nightly 2016-06-04

git clone https://github.com/brson/mir2wasm.git
cd mir2wasm
rustup override set nightly-2016-09-15

cargo build

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.

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))

• miri the MIR interpreter. mir2wasm is derived from it but shares no actual code. It probably should share code though, and there's lots to learn from miri.
• rustc_trans::mir.
• roadmap discussion.

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT) at your option.

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.