rust/stable_mir at 78bb5ee79e0261e8e47476b631da02acc1cb03ef - rust

History

Jubilee 4036472749 Rollup merge of #132131 - celinval:smir-crate-defs, r=compiler-errors [StableMIR] API to retrieve definitions from crates Add functions to retrieve function definitions and static items from all crates (local and external). For external crates, we're still missing items from trait implementation and primitives. r? ````@compiler-errors:```` Do you know what is the best way to retrieve the associated items for primitives and trait implementations for external crates? Thanks!		2024-11-07 18:48:22 -08:00
..
src	Rollup merge of #132131 - celinval:smir-crate-defs, r=compiler-errors	2024-11-07 18:48:22 -08:00
Cargo.toml
README.md	Update README.md	2024-10-24 16:19:55 -07:00
rust-toolchain.toml

README.md

This crate is currently developed in-tree together with the compiler.

Our goal is to start publishing stable_mir into crates.io. Until then, users will use this as any other rustc crate, by installing the rustup component rustc-dev, and declaring stable-mir as an external crate.

See the StableMIR "Getting Started" guide for more information.

Stable MIR Design

The stable-mir will follow a similar approach to proc-macro2. Its implementation is split between two main crates:

stable_mir: Public crate, to be published on crates.io, which will contain the stable data structure as well as calls to rustc_smir APIs. The translation between stable and internal constructs will also be done in this crate, however, this is currently implemented in the rustc_smir crate.¹.
rustc_smir: This crate implements the public APIs to the compiler. It is responsible for gathering all the information requested, and providing the data in its unstable form.

I.e., tools will depend on stable_mir crate, which will invoke the compiler using APIs defined in rustc_smir.

I.e.:

    ┌──────────────────────────────────┐           ┌──────────────────────────────────┐
    │   External Tool     ┌──────────┐ │           │ ┌──────────┐   Rust Compiler     │
    │                     │          │ │           │ │          │                     │
    │                     │stable_mir| │           │ │rustc_smir│                     │
    │                     │          │ ├──────────►| │          │                     │
    │                     │          │ │◄──────────┤ │          │                     │
    │                     │          │ │           │ │          │                     │
    │                     │          │ │           │ │          │                     │
    │                     └──────────┘ │           │ └──────────┘                     │
    └──────────────────────────────────┘           └──────────────────────────────────┘

More details can be found here: https://hackmd.io/XhnYHKKuR6-LChhobvlT-g?view

This is currently implemented in the rustc_smir crate, but we are working to change that. ↩︎