# Allocates a VTable for this class and gives it an id
	# * `vm` The currently executed VirtualMachine
	# * `explicit` Indicate if this class was directly instantiated (i.e. not indirectly loaded)
	private fun make_vt(vm: VirtualMachine, explicit: Bool)
	do
		# `ordering` contains the order of superclasses for virtual tables
		ordering = superclasses_ordering(vm)
		ordering.remove(self)

		var ids = new Array[Int]
		var nb_methods = new Array[Int]
		var nb_attributes = new Array[Int]

		# Absolute offset of attribute from the beginning of the attributes table
		var offset_attributes = 0

		# Absolute offset of method from the beginning of the methods table,
		# is initialize to 3 because the first position is empty in the virtual table
		# and the second and third are respectively class id and delta
		var offset_methods = 3

		var parent
		var prefix_index = ordering.index_of(prefix.as(not null))
		for i in [0..ordering.length[ do
			parent = ordering[i]

			# Get the number of introduced methods and attributes for this class
			var methods = parent.intro_mmethods.length
			var attributes = parent.intro_mattributes.length

			# Updates `mmethods` and `mattributes`
			mmethods.add_all(parent.intro_mmethods)
			mattributes.add_all(parent.intro_mattributes)

			ids.push(parent.vtable.id)
			nb_methods.push(methods)
			nb_attributes.push(attributes)

			# If the class is in the suffix part of the order
			if i > prefix_index then
				moved_class_attributes(vm, ordering[i], offset_attributes)
				moved_class_methods(vm, ordering[i], offset_methods)
			end

			offset_attributes += attributes
			offset_methods += methods
			offset_methods += 2 # Because each block starts with an id and the delta
		end

		# Update the positions of the class
		update_positions(offset_attributes, offset_methods)

		ordering.add(self)

		# Compute the identifier with Perfect Hashing
		compute_identifier(vm, ids, offset_methods)

		# Update caches and offsets of methods and attributes for this class
		# If the loading was explicit, the virtual table will be allocated and filled
		set_offsets(vm, explicit)

		if not explicit then
			# Just init the C-pointer to NULL to avoid errors
			vtable.internal_vtable = vm.memory_manager.null_ptr
		end
	end