Function rustc_mir::util::pretty::dump_path

fn dump_path<'tcx>(
    tcx: TyCtxt<'_>, 
    extension: &str, 
    pass_num: Option<&dyn Display>, 
    pass_name: &str, 
    disambiguator: &dyn Display, 
    source: MirSource<'tcx>
) -> PathBuf

Returns the path to the filename where we should dump a given MIR. Also used by other bits of code (e.g., NLL inference) that dump graphviz data or other things.