Add a stable MIR visitor This change also adds a few utility functions as well and extend most `mir` and `ty` ADTs to implement `PartialEq` and `Eq`. Fixes https://github.com/rust-lang/project-stable-mir/issues/32 r? `@oli-obk`
Add a stable MIR visitor This change also adds a few utility functions as well and extend most `mir` and `ty` ADTs to implement `PartialEq` and `Eq`. Fixes https://github.com/rust-lang/project-stable-mir/issues/32 r? `@oli-obk`