Function rustc_mir::util::pretty::dump_path

pub(in util::pretty) fn dump_path(
    tcx: TyCtxt<'_>, 
    basename: &str, 
    extension: &str
) -> 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.