Add InstanceDef::ReifyShim for track_caller functions.

Author: anp

src/librustc/mir/mono.rs

@@ -386,6 +386,7 @@ impl<'tcx> CodegenUnit<'tcx> {
                             tcx.hir().as_local_hir_id(def_id)
                         }
                         InstanceDef::VtableShim(..) |
+                        InstanceDef::ReifyShim(..) |
                         InstanceDef::Intrinsic(..) |
                         InstanceDef::FnPtrShim(..) |
                         InstanceDef::Virtual(..) |

src/librustc/ty/instance.rs

@@ -25,6 +25,9 @@ pub enum InstanceDef<'tcx> {
     /// `<T as Trait>::method` where `method` receives unsizeable `self: Self`.
     VtableShim(DefId),
 
+    /// `fn()` where the function is annotated with `#[track_caller]`.
+    ReifyShim(DefId),
+
     /// `<fn() as FnTrait>::call_*`
     /// `DefId` is `FnTrait::call_*`
     FnPtrShim(DefId, Ty<'tcx>),
@@ -123,6 +126,7 @@ impl<'tcx> InstanceDef<'tcx> {
         match *self {
             InstanceDef::Item(def_id) |
             InstanceDef::VtableShim(def_id) |
+            InstanceDef::ReifyShim(def_id) |
             InstanceDef::FnPtrShim(def_id, _) |
             InstanceDef::Virtual(def_id, _) |
             InstanceDef::Intrinsic(def_id, ) |
@@ -178,6 +182,9 @@ impl<'tcx> fmt::Display for Instance<'tcx> {
             InstanceDef::VtableShim(_) => {
                 write!(f, " - shim(vtable)")
             }
+            InstanceDef::ReifyShim(_) => {
+                write!(f, " - shim(reify)")
+            }
             InstanceDef::Intrinsic(_) => {
                 write!(f, " - intrinsic")
             }

src/librustc/ty/mod.rs

@@ -3026,6 +3026,7 @@ impl<'tcx> TyCtxt<'tcx> {
                 self.optimized_mir(did)
             }
             ty::InstanceDef::VtableShim(..) |
+            ty::InstanceDef::ReifyShim(..) |
             ty::InstanceDef::Intrinsic(..) |
             ty::InstanceDef::FnPtrShim(..) |
             ty::InstanceDef::Virtual(..) |

src/librustc/ty/structural_impls.rs

@@ -761,6 +761,8 @@ impl<'a, 'tcx> Lift<'tcx> for ty::InstanceDef<'a> {
                 Some(ty::InstanceDef::Item(def_id)),
             ty::InstanceDef::VtableShim(def_id) =>
                 Some(ty::InstanceDef::VtableShim(def_id)),
+            ty::InstanceDef::ReifyShim(def_id) =>
+                Some(ty::InstanceDef::ReifyShim(def_id)),
             ty::InstanceDef::Intrinsic(def_id) =>
                 Some(ty::InstanceDef::Intrinsic(def_id)),
             ty::InstanceDef::FnPtrShim(def_id, ref ty) =>
@@ -966,6 +968,7 @@ impl<'tcx> TypeFoldable<'tcx> for ty::instance::Instance<'tcx> {
             def: match self.def {
                 Item(did) => Item(did.fold_with(folder)),
                 VtableShim(did) => VtableShim(did.fold_with(folder)),
+                ReifyShim(did) => ReifyShim(did.fold_with(folder)),
                 Intrinsic(did) => Intrinsic(did.fold_with(folder)),
                 FnPtrShim(did, ty) => FnPtrShim(
                     did.fold_with(folder),
@@ -994,7 +997,7 @@ impl<'tcx> TypeFoldable<'tcx> for ty::instance::Instance<'tcx> {
         use crate::ty::InstanceDef::*;
         self.substs.visit_with(visitor) ||
         match self.def {
-            Item(did) | VtableShim(did) | Intrinsic(did) | Virtual(did, _) => {
+            Item(did) | VtableShim(did) | ReifyShim(did) | Intrinsic(did) | Virtual(did, _) => {
                 did.visit_with(visitor)
             },
             FnPtrShim(did, ty) | CloneShim(did, ty) => {

src/librustc_mir/interpret/terminator.rs

@@ -263,6 +263,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
                 Ok(())
             }
             ty::InstanceDef::VtableShim(..) |
+            ty::InstanceDef::ReifyShim(..) |
             ty::InstanceDef::ClosureOnceShim { .. } |
             ty::InstanceDef::FnPtrShim(..) |
             ty::InstanceDef::DropGlue(..) |

src/librustc_mir/monomorphize/collector.rs

@@ -740,6 +740,7 @@ fn visit_instance_use<'tcx>(
             }
         }
         ty::InstanceDef::VtableShim(..) |
+        ty::InstanceDef::ReifyShim(..) |
         ty::InstanceDef::Virtual(..) |
         ty::InstanceDef::DropGlue(_, None) => {
             // don't need to emit shim if we are calling directly.
@@ -766,6 +767,7 @@ fn should_monomorphize_locally<'tcx>(tcx: TyCtxt<'tcx>, instance: &Instance<'tcx
     let def_id = match instance.def {
         ty::InstanceDef::Item(def_id) => def_id,
         ty::InstanceDef::VtableShim(..) |
+        ty::InstanceDef::ReifyShim(..) |
         ty::InstanceDef::ClosureOnceShim { .. } |
         ty::InstanceDef::Virtual(..) |
         ty::InstanceDef::FnPtrShim(..) |

src/librustc_mir/monomorphize/partitioning.rs

@@ -329,6 +329,7 @@ fn mono_item_visibility(
 
         // These are all compiler glue and such, never exported, always hidden.
         InstanceDef::VtableShim(..) |
+        InstanceDef::ReifyShim(..) |
         InstanceDef::FnPtrShim(..) |
         InstanceDef::Virtual(..) |
         InstanceDef::Intrinsic(..) |
@@ -664,6 +665,7 @@ fn characteristic_def_id_of_mono_item<'tcx>(
             let def_id = match instance.def {
                 ty::InstanceDef::Item(def_id) => def_id,
                 ty::InstanceDef::VtableShim(..) |
+                ty::InstanceDef::ReifyShim(..) |
                 ty::InstanceDef::FnPtrShim(..) |
                 ty::InstanceDef::ClosureOnceShim { .. } |
                 ty::InstanceDef::Intrinsic(..) |

src/librustc_mir/shim.rs

@@ -41,6 +41,15 @@ fn make_shim<'tcx>(tcx: TyCtxt<'tcx>, instance: ty::InstanceDef<'tcx>) -> &'tcx
                 None,
             )
         }
+        ty::InstanceDef::ReifyShim(def_id) => {
+            build_call_shim(
+                tcx,
+                def_id,
+                Adjustment::DerefMove,
+                CallKind::Direct(def_id),
+                None,
+            )
+        }
         ty::InstanceDef::FnPtrShim(def_id, ty) => {
             let trait_ = tcx.trait_of_item(def_id).unwrap();
             let adjustment = match tcx.lang_items().fn_trait_kind(trait_) {