fn is_cast_to_bigger_memory_layout<'tcx>(
    cx: &LateContext<'tcx>,
    orig_expr: &'tcx Expr<'tcx>,
    peel_casts: impl FnMut() -> (&'tcx Expr<'tcx>, bool)
) -> Option<(TyAndLayout<'tcx>, TyAndLayout<'tcx>, Expr<'tcx>)>