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// Copyright 2016 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.
use mir::mir_map::MirMap;
use mir::repr::Mir;
use ty::TyCtxt;
use syntax::ast::NodeId;
/// Various information about pass.
pub trait Pass {
// fn name() for printouts of various sorts?
// fn should_run(Session) to check if pass should run?
}
/// A pass which inspects the whole MirMap.
pub trait MirMapPass<'tcx>: Pass {
fn run_pass(&mut self, cx: &TyCtxt<'tcx>, map: &mut MirMap<'tcx>);
}
/// A pass which inspects Mir of functions in isolation.
pub trait MirPass<'tcx>: Pass {
fn run_pass(&mut self, cx: &TyCtxt<'tcx>, id: NodeId, mir: &mut Mir<'tcx>);
}
impl<'tcx, T: MirPass<'tcx>> MirMapPass<'tcx> for T {
fn run_pass(&mut self, tcx: &TyCtxt<'tcx>, map: &mut MirMap<'tcx>) {
for (&id, mir) in &mut map.map {
MirPass::run_pass(self, tcx, id, mir);
}
}
}
/// A manager for MIR passes.
pub struct Passes {
passes: Vec<Box<for<'tcx> MirMapPass<'tcx>>>,
plugin_passes: Vec<Box<for<'tcx> MirMapPass<'tcx>>>
}
impl Passes {
pub fn new() -> Passes {
let passes = Passes {
passes: Vec::new(),
plugin_passes: Vec::new()
};
passes
}
pub fn run_passes<'tcx>(&mut self, pcx: &TyCtxt<'tcx>, map: &mut MirMap<'tcx>) {
for pass in &mut self.plugin_passes {
pass.run_pass(pcx, map);
}
for pass in &mut self.passes {
pass.run_pass(pcx, map);
}
}
/// Pushes a built-in pass.
pub fn push_pass(&mut self, pass: Box<for<'a> MirMapPass<'a>>) {
self.passes.push(pass);
}
}
/// Copies the plugin passes.
impl ::std::iter::Extend<Box<for<'a> MirMapPass<'a>>> for Passes {
fn extend<I: IntoIterator<Item=Box<for <'a> MirMapPass<'a>>>>(&mut self, it: I) {
self.plugin_passes.extend(it);
}
}
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