Stop using is_copy_modulo_regions when building clone shim

compiler/rustc_mir_transform/src/shim.rs

@@ -447,16 +447,13 @@ fn build_thread_local_shim<'tcx>(tcx: TyCtxt<'tcx>, instance: ty::InstanceDef<'t
 fn build_clone_shim<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId, self_ty: Ty<'tcx>) -> Body<'tcx> {
     debug!("build_clone_shim(def_id={:?})", def_id);
 
-    let param_env = tcx.param_env_reveal_all_normalized(def_id);
-
     let mut builder = CloneShimBuilder::new(tcx, def_id, self_ty);
-    let is_copy = self_ty.is_copy_modulo_regions(tcx, param_env);
 
     let dest = Place::return_place();
     let src = tcx.mk_place_deref(Place::from(Local::new(1 + 0)));
 
     match self_ty.kind() {
-        _ if is_copy => builder.copy_shim(),
+        ty::FnDef(..) | ty::FnPtr(_) => builder.copy_shim(),
         ty::Closure(_, args) => builder.tuple_like_shim(dest, src, args.as_closure().upvar_tys()),
         ty::Tuple(..) => builder.tuple_like_shim(dest, src, self_ty.tuple_fields()),
         ty::Coroutine(coroutine_def_id, args) => {

compiler/rustc_ty_utils/src/instance.rs

@@ -209,10 +209,8 @@ fn resolve_associated_item<'tcx>(
                 let name = tcx.item_name(trait_item_id);
                 if name == sym::clone {
                     let self_ty = trait_ref.self_ty();
-
-                    let is_copy = self_ty.is_copy_modulo_regions(tcx, param_env);
                     match self_ty.kind() {
-                        _ if is_copy => (),
+                        ty::FnDef(..) | ty::FnPtr(_) => (),
                         ty::Coroutine(..)
                         | ty::CoroutineWitness(..)
                         | ty::Closure(..)