Niko Matsakis 2b32cb90c7 retool MIR passes completely
The new setup is as follows. There is a pipeline of MIR passes that each
run **per def-id** to optimize a particular function. You are intended
to request MIR at whatever stage you need it. At the moment, there is
only one stage you can request:

- `optimized_mir(def_id)`

This yields the final product. Internally, it pulls the MIR for the
given def-id through a series of steps. Right now, these are still using
an "interned ref-cell" but they are intended to "steal" from one
another:

- `mir_build` -- performs the initial construction for local MIR
- `mir_pass_set` -- performs a suite of optimizations and transformations
- `mir_pass` -- an individual optimization within a suite

So, to construct the optimized MIR, we invoke:

    mir_pass_set((MIR_OPTIMIZED, def_id))

which will build up the final MIR.
2017-05-02 14:01:01 -04:00

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Rust

// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
/*!
Rust MIR: a lowered representation of Rust. Also: an experiment!
*/
#![crate_name = "rustc_mir"]
#![crate_type = "rlib"]
#![crate_type = "dylib"]
#![deny(warnings)]
#![unstable(feature = "rustc_private", issue = "27812")]
#![feature(associated_consts)]
#![feature(box_patterns)]
#![feature(box_syntax)]
#![feature(i128_type)]
#![feature(rustc_diagnostic_macros)]
#![feature(rustc_private)]
#![feature(staged_api)]
#![feature(placement_in_syntax)]
#![feature(collection_placement)]
#[macro_use] extern crate log;
extern crate graphviz as dot;
#[macro_use]
extern crate rustc;
extern crate rustc_data_structures;
#[macro_use]
#[no_link]
extern crate rustc_bitflags;
#[macro_use]
extern crate syntax;
extern crate syntax_pos;
extern crate rustc_const_math;
extern crate rustc_const_eval;
pub mod diagnostics;
pub mod build;
pub mod callgraph;
mod hair;
mod shim;
pub mod mir_map;
pub mod transform;
pub mod util;
use rustc::ty::maps::Providers;
pub fn provide(providers: &mut Providers) {
mir_map::provide(providers);
shim::provide(providers);
transform::provide(providers);
}