Allow usage_of_ty_tykind only in sty

and in some special cases

src/librustc/ty/codec.rs

@@ -27,6 +27,7 @@ pub trait EncodableWithShorthand: Clone + Eq + Hash {
     fn variant(&self) -> &Self::Variant;
 }
 
+#[cfg_attr(not(bootstrap), allow(rustc::usage_of_ty_tykind))]
 impl<'tcx> EncodableWithShorthand for Ty<'tcx> {
     type Variant = ty::TyKind<'tcx>;
     fn variant(&self) -> &Self::Variant {
@@ -159,6 +160,7 @@ where
     Ok(decoder.map_encoded_cnum_to_current(cnum))
 }
 
+#[cfg_attr(not(bootstrap), allow(rustc::usage_of_ty_tykind))]
 #[inline]
 pub fn decode_ty<D>(decoder: &mut D) -> Result<Ty<'tcx>, D::Error>
 where

src/librustc/ty/context.rs

@@ -135,6 +135,7 @@ impl<'tcx> CtxtInterners<'tcx> {
     }
 
     /// Intern a type
+    #[cfg_attr(not(bootstrap), allow(rustc::usage_of_ty_tykind))]
     #[inline(never)]
     fn intern_ty(
         local: &CtxtInterners<'tcx>,
@@ -2195,6 +2196,7 @@ impl<'tcx> Hash for Interned<'tcx, TyS<'tcx>> {
     }
 }
 
+#[cfg_attr(not(bootstrap), allow(rustc::usage_of_ty_tykind))]
 impl<'tcx> Borrow<TyKind<'tcx>> for Interned<'tcx, TyS<'tcx>> {
     fn borrow<'a>(&'a self) -> &'a TyKind<'tcx> {
         &self.0.sty
@@ -2429,6 +2431,7 @@ impl<'tcx> TyCtxt<'tcx> {
         self.mk_fn_ptr(converted_sig)
     }
 
+    #[cfg_attr(not(bootstrap), allow(rustc::usage_of_ty_tykind))]
     #[inline]
     pub fn mk_ty(&self, st: TyKind<'tcx>) -> Ty<'tcx> {
         CtxtInterners::intern_ty(&self.interners, &self.global_interners, st)

src/librustc/ty/flags.rs

@@ -18,6 +18,7 @@ impl FlagComputation {
         }
     }
 
+    #[cfg_attr(not(bootstrap), allow(rustc::usage_of_ty_tykind))]
     pub fn for_sty(st: &ty::TyKind<'_>) -> FlagComputation {
         let mut result = FlagComputation::new();
         result.add_sty(st);
@@ -61,6 +62,7 @@ impl FlagComputation {
         } // otherwise, this binder captures nothing
     }
 
+    #[cfg_attr(not(bootstrap), allow(rustc::usage_of_ty_tykind))]
     fn add_sty(&mut self, st: &ty::TyKind<'_>) {
         match st {
             &ty::Bool |

src/librustc/ty/mod.rs

@@ -1,7 +1,5 @@
 // ignore-tidy-filelength
 
-#![cfg_attr(not(bootstrap), allow(rustc::usage_of_ty_tykind))]
-
 pub use self::Variance::*;
 pub use self::AssocItemContainer::*;
 pub use self::BorrowKind::*;
@@ -484,6 +482,7 @@ bitflags! {
     }
 }
 
+#[cfg_attr(not(bootstrap), allow(rustc::usage_of_ty_tykind))]
 pub struct TyS<'tcx> {
     pub sty: TyKind<'tcx>,
     pub flags: TypeFlags,
@@ -541,29 +540,29 @@ impl<'tcx> Hash for TyS<'tcx> {
 impl<'tcx> TyS<'tcx> {
     pub fn is_primitive_ty(&self) -> bool {
         match self.sty {
-            TyKind::Bool |
-            TyKind::Char |
-            TyKind::Int(_) |
-            TyKind::Uint(_) |
-            TyKind::Float(_) |
-            TyKind::Infer(InferTy::IntVar(_)) |
-            TyKind::Infer(InferTy::FloatVar(_)) |
-            TyKind::Infer(InferTy::FreshIntTy(_)) |
-            TyKind::Infer(InferTy::FreshFloatTy(_)) => true,
-            TyKind::Ref(_, x, _) => x.is_primitive_ty(),
+            Bool |
+            Char |
+            Int(_) |
+            Uint(_) |
+            Float(_) |
+            Infer(InferTy::IntVar(_)) |
+            Infer(InferTy::FloatVar(_)) |
+            Infer(InferTy::FreshIntTy(_)) |
+            Infer(InferTy::FreshFloatTy(_)) => true,
+            Ref(_, x, _) => x.is_primitive_ty(),
             _ => false,
         }
     }
 
     pub fn is_suggestable(&self) -> bool {
         match self.sty {
-            TyKind::Opaque(..) |
-            TyKind::FnDef(..) |
-            TyKind::FnPtr(..) |
-            TyKind::Dynamic(..) |
-            TyKind::Closure(..) |
-            TyKind::Infer(..) |
-            TyKind::Projection(..) => false,
+            Opaque(..) |
+            FnDef(..) |
+            FnPtr(..) |
+            Dynamic(..) |
+            Closure(..) |
+            Infer(..) |
+            Projection(..) => false,
             _ => true,
         }
     }

src/librustc/ty/sty.rs

@@ -1,5 +1,7 @@
 //! This module contains `TyKind` and its major components.
 
+#![cfg_attr(not(bootstrap), allow(rustc::usage_of_ty_tykind))]
+
 use crate::hir;
 use crate::hir::def_id::DefId;
 use crate::infer::canonical::Canonical;