if let StmtKind::Let(local) = stmt.kind
    && let Some(init) = local.init
    && let ExprKind::Call(func, args) = init.kind
    && is_path_diagnostic_item(cx, func, sym::cmp_min)
    && args.len() == 2
    && let ExprKind::Lit(ref lit) = args[0].kind
    && let LitKind::Int(3, LitIntType::Unsuffixed) = lit.node
    && let ExprKind::Lit(ref lit1) = args[1].kind
    && let LitKind::Int(4, LitIntType::Unsuffixed) = lit1.node
    && let PatKind::Wild = local.pat.kind
{
    // report your lint here
}