def get_user_varname(v):
        """get original variable name by user if possible"""
        if not isinstance(v, ir.Var):
            return v
        v = v.name
        if "var_rename_map" in metadata and v in metadata["var_rename_map"]:
            user_varname = metadata["var_rename_map"][v]
            return user_varname
        return v
get original variable name by user if possible
numba/parfors/parfor.py