Function load_vtable

pub(crate) fn load_vtable<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
    bx: &mut Bx,
    llvtable: Bx::Value,
    llty: Bx::Type,
    vtable_byte_offset: u64,
    ty: Ty<'tcx>,
    nonnull: bool,
) -> Bx::Value

Call this function whenever you need to load a vtable.