Pass down the self def id instead of the type

Author: Manishearth

src/librustc/ich/impls_ty.rs

@@ -761,8 +761,11 @@ impl<'gcx> HashStable<StableHashingContext<'gcx>> for ty::InstanceDef<'gcx> {
             ty::InstanceDef::CloneCopyShim(def_id) => {
                 def_id.hash_stable(hcx, hasher);
             }
-            ty::InstanceDef::CloneStructuralShim(def_id, t) |
-            ty::InstanceDef::CloneNominalShim(def_id, t) => {
+            ty::InstanceDef::CloneNominalShim { clone, ty } => {
+                clone.hash_stable(hcx, hasher);
+                ty.hash_stable(hcx, hasher);
+            }
+            ty::InstanceDef::CloneStructuralShim(def_id, t) => {
                 def_id.hash_stable(hcx, hasher);
                 t.hash_stable(hcx, hasher);
             }

src/librustc/ty/instance.rs

@@ -53,9 +53,12 @@ pub enum InstanceDef<'tcx> {
     /// The DefId is the DefId of the Clone::clone function
     CloneStructuralShim(DefId, Ty<'tcx>),
     ///`<T as Clone>::clone` shim for closures
-    ///
-    /// The DefId is the DefId of the Clone::clone function
-    CloneNominalShim(DefId, Ty<'tcx>),
+    CloneNominalShim {
+        /// The DefId of the Clone::clone trait method def
+        clone: DefId,
+        /// The DefId of the self type
+        ty: DefId
+    },
 }
 
 impl<'a, 'tcx> Instance<'tcx> {
@@ -80,7 +83,7 @@ impl<'tcx> InstanceDef<'tcx> {
             InstanceDef::DropGlue(def_id, _) |
             InstanceDef::CloneCopyShim(def_id) |
             InstanceDef::CloneStructuralShim(def_id, _) |
-            InstanceDef::CloneNominalShim(def_id, _) => def_id
+            InstanceDef::CloneNominalShim{ clone: def_id, ..} => def_id
         }
     }
 
@@ -146,11 +149,11 @@ impl<'tcx> fmt::Display for Instance<'tcx> {
             InstanceDef::DropGlue(_, ty) => {
                 write!(f, " - shim({:?})", ty)
             }
-            InstanceDef::CloneCopyShim(def) => {
+            InstanceDef::CloneCopyShim(def) |
+            InstanceDef::CloneNominalShim { ty: def, ..} => {
                 write!(f, " - shim({:?})", def)
             }
-            InstanceDef::CloneStructuralShim(_, ty) |
-            InstanceDef::CloneNominalShim(_, ty) => {
+            InstanceDef::CloneStructuralShim(_, ty) => {
                 write!(f, " - shim({:?})", ty)
             }
         }
@@ -308,6 +311,7 @@ fn resolve_associated_item<'a, 'tcx>(
         }
         traits::VtableBuiltin(..) => {
             if let Some(_) = tcx.lang_items().clone_trait() {
+                let mut substs = rcvr_substs;
                 let name = tcx.item_name(def_id);
                 let def = if name == "clone" {
                     let self_ty = trait_ref.self_ty();
@@ -317,15 +321,21 @@ fn resolve_associated_item<'a, 'tcx>(
                         }
                         ty::TyArray(..) => ty::InstanceDef::CloneStructuralShim(def_id, self_ty),
                         ty::TyTuple(..) => ty::InstanceDef::CloneStructuralShim(def_id, self_ty),
-                        ty::TyClosure(..) => ty::InstanceDef::CloneNominalShim(def_id, self_ty),
+                        ty::TyClosure(ty_did, closure_substs) => {
+                            substs = closure_substs.substs;
+                            ty::InstanceDef::CloneNominalShim {
+                                clone: def_id,
+                                ty: ty_did
+                            }
+                        }
                         _ => unreachable!("Type {:?} does not have clone shims", self_ty)
                     }
                 } else {
                     ty::InstanceDef::Item(def_id)
                 };
                 Some(Instance {
                     def,
-                    substs: rcvr_substs
+                    substs
                 })
             } else {
                 None

src/librustc/ty/mod.rs

@@ -2353,7 +2353,7 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
             ty::InstanceDef::DropGlue(..) |
             ty::InstanceDef::CloneCopyShim(..) |
             ty::InstanceDef::CloneStructuralShim(..) |
-            ty::InstanceDef::CloneNominalShim(..) => {
+            ty::InstanceDef::CloneNominalShim { .. } => {
                 self.mir_shims(instance)
             }
         }

src/librustc_mir/interpret/terminator/mod.rs

@@ -297,7 +297,7 @@ impl<'a, 'tcx, M: Machine<'tcx>> EvalContext<'a, 'tcx, M> {
             ty::InstanceDef::DropGlue(..) |
             ty::InstanceDef::CloneCopyShim(..) |
             ty::InstanceDef::CloneStructuralShim(..) |
-            ty::InstanceDef::CloneNominalShim(..) |
+            ty::InstanceDef::CloneNominalShim { .. } |
             ty::InstanceDef::Item(_) => {
                 // Push the stack frame, and potentially be entirely done if the call got hooked
                 if M::eval_fn_call(self, instance, destination, args, span, sig)? {

src/librustc_mir/monomorphize/collector.rs

@@ -713,7 +713,7 @@ fn visit_instance_use<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
         ty::InstanceDef::FnPtrShim(..) |
         ty::InstanceDef::CloneCopyShim(..) |
         ty::InstanceDef::CloneStructuralShim(..) |
-        ty::InstanceDef::CloneNominalShim(..) => {
+        ty::InstanceDef::CloneNominalShim { .. } => {
             output.push(create_fn_mono_item(instance));
         }
     }
@@ -733,7 +733,7 @@ fn should_monomorphize_locally<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, instance:
         ty::InstanceDef::Intrinsic(_) |
         ty::InstanceDef::CloneCopyShim(..) |
         ty::InstanceDef::CloneStructuralShim(..) |
-        ty::InstanceDef::CloneNominalShim(..) => return true
+        ty::InstanceDef::CloneNominalShim { .. } => return true
     };
     match tcx.hir.get_if_local(def_id) {
         Some(hir_map::NodeForeignItem(..)) => {

src/librustc_mir/monomorphize/partitioning.rs

@@ -177,7 +177,7 @@ pub trait CodegenUnitExt<'tcx> {
                         InstanceDef::DropGlue(..) |
                         InstanceDef::CloneCopyShim(..) |
                         InstanceDef::CloneStructuralShim(..) |
-                        InstanceDef::CloneNominalShim(..) => {
+                        InstanceDef::CloneNominalShim { .. } => {
                             None
                         }
                     }
@@ -380,7 +380,7 @@ fn place_root_translation_items<'a, 'tcx, I>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
                             InstanceDef::DropGlue(..) |
                             InstanceDef::CloneCopyShim(..) |
                             InstanceDef::CloneStructuralShim(..) |
-                            InstanceDef::CloneNominalShim(..) => {
+                            InstanceDef::CloneNominalShim { .. } => {
                                 Visibility::Hidden
                             }
                         };
@@ -625,7 +625,7 @@ fn characteristic_def_id_of_trans_item<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
                 ty::InstanceDef::Virtual(..) |
                 ty::InstanceDef::CloneCopyShim(..) |
                 ty::InstanceDef::CloneStructuralShim(..) |
-                ty::InstanceDef::CloneNominalShim(..) => return None
+                ty::InstanceDef::CloneNominalShim { .. } => return None
             };
 
             // If this is a method, we want to put it into the same module as

src/librustc_mir/shim.rs

@@ -106,7 +106,10 @@ fn make_shim<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
             builder.copy_shim();
             builder.into_mir()
         }
-        ty::InstanceDef::CloneNominalShim(def_id, ty) |
+        ty::InstanceDef::CloneNominalShim { clone, ty } => {
+            let ty = tcx.type_of(ty);
+            build_clone_shim(tcx, clone, ty)
+        }
         ty::InstanceDef::CloneStructuralShim(def_id, ty) => {
             build_clone_shim(tcx, def_id, ty)
         }