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//! This pass just dumps MIR at a specified point.
use std::borrow::Cow;
use std::fmt;
use std::fs::File;
use std::io;
use rustc::mir::Mir;
use rustc::session::config::{OutputFilenames, OutputType};
use rustc::ty::TyCtxt;
use transform::{MirPass, MirSource};
use util as mir_util;
pub struct Marker(pub &'static str);
impl MirPass for Marker {
fn name<'a>(&'a self) -> Cow<'a, str> {
Cow::Borrowed(self.0)
}
fn run_pass<'a, 'tcx>(&self,
_tcx: TyCtxt<'a, 'tcx, 'tcx>,
_source: MirSource,
_mir: &mut Mir<'tcx>)
{
}
}
pub struct Disambiguator {
is_after: bool
}
impl fmt::Display for Disambiguator {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
let title = if self.is_after { "after" } else { "before" };
write!(formatter, "{}", title)
}
}
pub fn on_mir_pass<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
pass_num: &dyn fmt::Display,
pass_name: &str,
source: MirSource,
mir: &Mir<'tcx>,
is_after: bool) {
if mir_util::dump_enabled(tcx, pass_name, source) {
mir_util::dump_mir(tcx,
Some(pass_num),
pass_name,
&Disambiguator { is_after },
source,
mir,
|_, _| Ok(()) );
}
}
pub fn emit_mir<'a, 'tcx>(
tcx: TyCtxt<'a, 'tcx, 'tcx>,
outputs: &OutputFilenames)
-> io::Result<()>
{
let path = outputs.path(OutputType::Mir);
let mut f = File::create(&path)?;
mir_util::write_mir_pretty(tcx, None, &mut f)?;
Ok(())
}
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