message: Implement vtable_size and vtable_align intrinsics for cg_clif
diff: @@ -431,6 +431,16 @@ fn codegen_regular_intrinsic_call<'tcx>(
  ret.write_cvalue(fx, CValue::by_val(align, usize_layout));
  };
  + vtable_size, (v vtable) {
  + let size = crate::vtable::size_of_obj(fx, vtable);
  + ret.write_cvalue(fx, CValue::by_val(size, usize_layout));
  + };
  +
  + vtable_align, (v vtable) {
  + let align = crate::vtable::min_align_of_obj(fx, vtable);
  + ret.write_cvalue(fx, CValue::by_val(align, usize_layout));
  + };
  +
  unchecked_add | unchecked_sub | unchecked_mul | unchecked_div | exact_div | unchecked_rem
  | unchecked_shl | unchecked_shr, (c x, c y) {
  // FIXME trap on overflow
  