change usages of type_of to bound_type_of

compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs

@@ -2592,7 +2592,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
             if is_closure {
                 None
             } else {
-                let ty = self.infcx.tcx.type_of(self.mir_def_id());
+                let ty = self.infcx.tcx.bound_type_of(self.mir_def_id()).subst_identity();
                 match ty.kind() {
                     ty::FnDef(_, _) | ty::FnPtr(_) => self.annotate_fn_sig(
                         self.mir_def_id(),

compiler/rustc_borrowck/src/diagnostics/mod.rs

@@ -1185,7 +1185,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                     let parent_self_ty =
                         matches!(tcx.def_kind(parent_did), rustc_hir::def::DefKind::Impl { .. })
                             .then_some(parent_did)
-                            .and_then(|did| match tcx.type_of(did).kind() {
+                            .and_then(|did| match tcx.bound_type_of(did).subst_identity().kind() {
                                 ty::Adt(def, ..) => Some(def.did()),
                                 _ => None,
                             });

compiler/rustc_borrowck/src/diagnostics/region_errors.rs

@@ -575,7 +575,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
 
         let mut output_ty = self.regioncx.universal_regions().unnormalized_output_ty;
         if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }) = *output_ty.kind() {
-            output_ty = self.infcx.tcx.type_of(def_id)
+            output_ty = self.infcx.tcx.bound_type_of(def_id).subst_identity()
         };
 
         debug!("report_fnmut_error: output_ty={:?}", output_ty);
@@ -896,7 +896,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
             debug!(?fn_did, ?substs);
 
             // Only suggest this on function calls, not closures
-            let ty = tcx.type_of(fn_did);
+            let ty = tcx.bound_type_of(fn_did).subst_identity();
             debug!("ty: {:?}, ty.kind: {:?}", ty, ty.kind());
             if let ty::Closure(_, _) = ty.kind() {
                 return;

compiler/rustc_borrowck/src/diagnostics/region_name.rs

@@ -850,7 +850,9 @@ impl<'tcx> MirBorrowckCtxt<'_, 'tcx> {
         };
 
         let found = tcx
-            .any_free_region_meets(&tcx.type_of(region_parent), |r| *r == ty::ReEarlyBound(region));
+            .any_free_region_meets(&tcx.bound_type_of(region_parent).subst_identity(), |r| {
+                *r == ty::ReEarlyBound(region)
+            });
 
         Some(RegionName {
             name: self.synthesize_region_name(),

compiler/rustc_borrowck/src/type_check/mod.rs

@@ -402,7 +402,7 @@ impl<'a, 'b, 'tcx> Visitor<'tcx> for TypeVerifier<'a, 'b, 'tcx> {
                     );
                 }
             } else if let Some(static_def_id) = constant.check_static_ptr(tcx) {
-                let unnormalized_ty = tcx.type_of(static_def_id);
+                let unnormalized_ty = tcx.bound_type_of(static_def_id).subst_identity();
                 let normalized_ty = self.cx.normalize(unnormalized_ty, locations);
                 let literal_ty = constant.literal.ty().builtin_deref(true).unwrap().ty;
 

compiler/rustc_borrowck/src/universal_regions.rs

@@ -529,7 +529,7 @@ impl<'cx, 'tcx> UniversalRegionsBuilder<'cx, 'tcx> {
         match tcx.hir().body_owner_kind(self.mir_def.did) {
             BodyOwnerKind::Closure | BodyOwnerKind::Fn => {
                 let defining_ty = if self.mir_def.did.to_def_id() == typeck_root_def_id {
-                    tcx.type_of(typeck_root_def_id)
+                    tcx.bound_type_of(typeck_root_def_id).subst_identity()
                 } else {
                     let tables = tcx.typeck(self.mir_def.did);
                     tables.node_type(self.mir_hir_id)
@@ -675,7 +675,7 @@ impl<'cx, 'tcx> UniversalRegionsBuilder<'cx, 'tcx> {
                 // For a constant body, there are no inputs, and one
                 // "output" (the type of the constant).
                 assert_eq!(self.mir_def.did.to_def_id(), def_id);
-                let ty = tcx.type_of(self.mir_def.def_id_for_type_of());
+                let ty = tcx.bound_type_of(self.mir_def.def_id_for_type_of()).subst_identity();
                 let ty = indices.fold_to_region_vids(tcx, ty);
                 ty::Binder::dummy(tcx.intern_type_list(&[ty]))
             }

compiler/rustc_codegen_llvm/src/debuginfo/mod.rs

@@ -508,7 +508,7 @@ impl<'ll, 'tcx> DebugInfoMethods<'tcx> for CodegenCx<'ll, 'tcx> {
                     let impl_self_ty = cx.tcx.subst_and_normalize_erasing_regions(
                         instance.substs,
                         ty::ParamEnv::reveal_all(),
-                        cx.tcx.type_of(impl_def_id),
+                        cx.tcx.bound_type_of(impl_def_id).skip_binder(),
                     );
 
                     // Only "class" methods are generally understood by LLVM,

compiler/rustc_const_eval/src/interpret/memory.rs

@@ -690,7 +690,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
                 assert!(self.tcx.is_static(def_id));
                 assert!(!self.tcx.is_thread_local_static(def_id));
                 // Use size and align of the type.
-                let ty = self.tcx.type_of(def_id);
+                let ty = self.tcx.bound_type_of(def_id).subst_identity();
                 let layout = self.tcx.layout_of(ParamEnv::empty().and(ty)).unwrap();
                 assert!(layout.is_sized());
                 (layout.size, layout.align.abi, AllocKind::LiveData)

compiler/rustc_const_eval/src/transform/check_consts/mod.rs

@@ -68,7 +68,7 @@ impl<'mir, 'tcx> ConstCx<'mir, 'tcx> {
     pub fn fn_sig(&self) -> PolyFnSig<'tcx> {
         let did = self.def_id().to_def_id();
         if self.tcx.is_closure(did) {
-            let ty = self.tcx.type_of(did);
+            let ty = self.tcx.bound_type_of(did).subst_identity();
             let ty::Closure(_, substs) = ty.kind() else { bug!("type_of closure not ty::Closure") };
             substs.as_closure().sig()
         } else {

compiler/rustc_hir_analysis/src/astconv/generics.rs

@@ -77,7 +77,7 @@ fn generic_arg_mismatch_err(
             Res::Def(DefKind::TyParam, src_def_id) => {
                 if let Some(param_local_id) = param.def_id.as_local() {
                     let param_name = tcx.hir().ty_param_name(param_local_id);
-                    let param_type = tcx.type_of(param.def_id);
+                    let param_type = tcx.bound_type_of(param.def_id).subst_identity();
                     if param_type.is_suggestable(tcx, false) {
                         err.span_suggestion(
                             tcx.def_span(src_def_id),
@@ -97,7 +97,7 @@ fn generic_arg_mismatch_err(
         (
             GenericArg::Type(hir::Ty { kind: hir::TyKind::Array(_, len), .. }),
             GenericParamDefKind::Const { .. },
-        ) if tcx.type_of(param.def_id) == tcx.types.usize => {
+        ) if tcx.bound_type_of(param.def_id).skip_binder() == tcx.types.usize => {
             let snippet = sess.source_map().span_to_snippet(tcx.hir().span(len.hir_id()));
             if let Ok(snippet) = snippet {
                 err.span_suggestion(

compiler/rustc_hir_analysis/src/astconv/mod.rs

@@ -30,9 +30,9 @@ use rustc_hir::{GenericArg, GenericArgs, OpaqueTyOrigin};
 use rustc_infer::infer::{InferCtxt, TyCtxtInferExt};
 use rustc_middle::middle::stability::AllowUnstable;
 use rustc_middle::ty::subst::{self, GenericArgKind, InternalSubsts, SubstsRef};
+use rustc_middle::ty::DynKind;
 use rustc_middle::ty::GenericParamDefKind;
 use rustc_middle::ty::{self, Const, DefIdTree, IsSuggestable, Ty, TyCtxt, TypeVisitable};
-use rustc_middle::ty::{DynKind, EarlyBinder};
 use rustc_session::lint::builtin::{AMBIGUOUS_ASSOCIATED_ITEMS, BARE_TRAIT_OBJECTS};
 use rustc_span::edition::Edition;
 use rustc_span::lev_distance::find_best_match_for_name;
@@ -450,7 +450,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                         .into()
                     }
                     (&GenericParamDefKind::Const { .. }, hir::GenericArg::Infer(inf)) => {
-                        let ty = tcx.at(self.span).type_of(param.def_id);
+                        let ty = tcx.at(self.span).bound_type_of(param.def_id).subst_identity();
                         if self.astconv.allow_ty_infer() {
                             self.astconv.ct_infer(ty, Some(param), inf.span).into()
                         } else {
@@ -503,7 +503,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                         }
                     }
                     GenericParamDefKind::Const { has_default } => {
-                        let ty = tcx.at(self.span).type_of(param.def_id);
+                        let ty = tcx.at(self.span).bound_type_of(param.def_id).subst_identity();
                         if ty.references_error() {
                             return tcx.const_error(ty).into();
                         }
@@ -2688,7 +2688,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                 // `Self` in impl (we know the concrete type).
                 assert_eq!(opt_self_ty, None);
                 // Try to evaluate any array length constants.
-                let ty = tcx.at(span).type_of(def_id);
+                let ty = tcx.at(span).bound_type_of(def_id).subst_identity();
                 let span_of_impl = tcx.span_of_impl(def_id);
                 self.prohibit_generics(path.segments.iter(), |err| {
                     let def_id = match *ty.kind() {
@@ -2922,7 +2922,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                     None,
                     ty::BoundConstness::NotConst,
                 );
-                EarlyBinder(tcx.at(span).type_of(def_id)).subst(tcx, substs)
+                tcx.at(span).bound_type_of(def_id).subst(tcx, substs)
             }
             hir::TyKind::Array(ty, length) => {
                 let length = match length {
@@ -2935,7 +2935,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                 tcx.mk_array_with_const_len(self.ast_ty_to_ty(ty), length)
             }
             hir::TyKind::Typeof(e) => {
-                let ty_erased = tcx.type_of(e.def_id);
+                let ty_erased = tcx.bound_type_of(e.def_id).subst_identity();
                 let ty = tcx.fold_regions(ty_erased, |r, _| {
                     if r.is_erased() { tcx.lifetimes.re_static } else { r }
                 });

compiler/rustc_hir_analysis/src/check/check.rs

@@ -93,7 +93,7 @@ fn check_union(tcx: TyCtxt<'_>, def_id: LocalDefId) {
 
 /// Check that the fields of the `union` do not need dropping.
 fn check_union_fields(tcx: TyCtxt<'_>, span: Span, item_def_id: LocalDefId) -> bool {
-    let item_type = tcx.type_of(item_def_id);
+    let item_type = tcx.bound_type_of(item_def_id).subst_identity();
     if let ty::Adt(def, substs) = item_type.kind() {
         assert!(def.is_union());
 
@@ -170,7 +170,7 @@ fn check_static_inhabited(tcx: TyCtxt<'_>, def_id: LocalDefId) {
     // would be enough to check this for `extern` statics, as statics with an initializer will
     // have UB during initialization if they are uninhabited, but there also seems to be no good
     // reason to allow any statics to be uninhabited.
-    let ty = tcx.type_of(def_id);
+    let ty = tcx.bound_type_of(def_id).subst_identity();
     let span = tcx.def_span(def_id);
     let layout = match tcx.layout_of(ParamEnv::reveal_all().and(ty)) {
         Ok(l) => l,
@@ -227,7 +227,7 @@ fn check_opaque(tcx: TyCtxt<'_>, id: hir::ItemId) {
     if !tcx.features().impl_trait_projections {
         check_opaque_for_inheriting_lifetimes(tcx, item.owner_id.def_id, span);
     }
-    if tcx.type_of(item.owner_id.def_id).references_error() {
+    if tcx.bound_type_of(item.owner_id.def_id).subst_identity().references_error() {
         return;
     }
     if check_opaque_for_cycles(tcx, item.owner_id.def_id, substs, span, &origin).is_err() {
@@ -492,7 +492,7 @@ fn is_enum_of_nonnullable_ptr<'tcx>(
 
 fn check_static_linkage(tcx: TyCtxt<'_>, def_id: LocalDefId) {
     if tcx.codegen_fn_attrs(def_id).import_linkage.is_some() {
-        if match tcx.type_of(def_id).kind() {
+        if match tcx.bound_type_of(def_id).subst_identity().kind() {
             ty::RawPtr(_) => false,
             ty::Adt(adt_def, substs) => !is_enum_of_nonnullable_ptr(tcx, *adt_def, *substs),
             _ => true,
@@ -578,7 +578,7 @@ fn check_item_type(tcx: TyCtxt<'_>, id: hir::ItemId) {
             }
         }
         DefKind::TyAlias => {
-            let pty_ty = tcx.type_of(id.owner_id);
+            let pty_ty = tcx.bound_type_of(id.owner_id).subst_identity();
             let generics = tcx.generics_of(id.owner_id);
             check_type_params_are_used(tcx, &generics, pty_ty);
         }
@@ -854,7 +854,7 @@ fn check_impl_items_against_trait<'tcx>(
 }
 
 pub fn check_simd(tcx: TyCtxt<'_>, sp: Span, def_id: LocalDefId) {
-    let t = tcx.type_of(def_id);
+    let t = tcx.bound_type_of(def_id).subst_identity();
     if let ty::Adt(def, substs) = t.kind()
         && def.is_struct()
     {
@@ -974,7 +974,7 @@ pub(super) fn check_packed(tcx: TyCtxt<'_>, sp: Span, def: ty::AdtDef<'_>) {
                             &if first {
                                 format!(
                                     "`{}` contains a field of type `{}`",
-                                    tcx.type_of(def.did()),
+                                    tcx.bound_type_of(def.did()).subst_identity(),
                                     ident
                                 )
                             } else {
@@ -996,7 +996,7 @@ pub(super) fn check_packed_inner(
     def_id: DefId,
     stack: &mut Vec<DefId>,
 ) -> Option<Vec<(DefId, Span)>> {
-    if let ty::Adt(def, substs) = tcx.type_of(def_id).kind() {
+    if let ty::Adt(def, substs) = tcx.bound_type_of(def_id).subst_identity().kind() {
         if def.is_struct() || def.is_union() {
             if def.repr().align.is_some() {
                 return Some(vec![(def.did(), DUMMY_SP)]);

compiler/rustc_hir_analysis/src/check/compare_impl_item.rs

@@ -1580,7 +1580,8 @@ fn compare_generic_param_kinds<'tcx>(
         use GenericParamDefKind::*;
         if match (&param_impl.kind, &param_trait.kind) {
             (Const { .. }, Const { .. })
-                if tcx.type_of(param_impl.def_id) != tcx.type_of(param_trait.def_id) =>
+                if tcx.bound_type_of(param_impl.def_id)
+                    != tcx.bound_type_of(param_trait.def_id) =>
             {
                 true
             }
@@ -1605,7 +1606,11 @@ fn compare_generic_param_kinds<'tcx>(
 
             let make_param_message = |prefix: &str, param: &ty::GenericParamDef| match param.kind {
                 Const { .. } => {
-                    format!("{} const parameter of type `{}`", prefix, tcx.type_of(param.def_id))
+                    format!(
+                        "{} const parameter of type `{}`",
+                        prefix,
+                        tcx.bound_type_of(param.def_id).subst_identity()
+                    )
                 }
                 Type { .. } => format!("{} type parameter", prefix),
                 Lifetime { .. } => unreachable!(),
@@ -1654,7 +1659,7 @@ pub(super) fn compare_impl_const_raw(
     // Create a parameter environment that represents the implementation's
     // method.
     // Compute placeholder form of impl and trait const tys.
-    let impl_ty = tcx.type_of(impl_const_item_def.to_def_id());
+    let impl_ty = tcx.bound_type_of(impl_const_item_def.to_def_id()).subst_identity();
     let trait_ty = tcx.bound_type_of(trait_const_item_def).subst(tcx, trait_to_impl_substs);
     let mut cause = ObligationCause::new(
         impl_c_span,
@@ -1927,7 +1932,7 @@ pub(super) fn check_type_bounds<'tcx>(
             bound_vars.push(bound_var);
             tcx.mk_const(
                 ty::ConstKind::Bound(ty::INNERMOST, ty::BoundVar::from_usize(bound_vars.len() - 1)),
-                tcx.type_of(param.def_id),
+                tcx.bound_type_of(param.def_id).subst_identity(),
             )
             .into()
         }
@@ -1937,7 +1942,7 @@ pub(super) fn check_type_bounds<'tcx>(
     let container_id = impl_ty.container_id(tcx);
 
     let rebased_substs = impl_ty_substs.rebase_onto(tcx, container_id, impl_trait_ref.substs);
-    let impl_ty_value = tcx.type_of(impl_ty.def_id);
+    let impl_ty_value = tcx.bound_type_of(impl_ty.def_id).subst_identity();
 
     let param_env = tcx.param_env(impl_ty.def_id);
 

compiler/rustc_hir_analysis/src/check/dropck.rs

@@ -27,7 +27,7 @@ use rustc_middle::ty::{self, Predicate, Ty, TyCtxt};
 ///    cannot do `struct S<T>; impl<T:Clone> Drop for S<T> { ... }`).
 ///
 pub fn check_drop_impl(tcx: TyCtxt<'_>, drop_impl_did: DefId) -> Result<(), ErrorGuaranteed> {
-    let dtor_self_type = tcx.type_of(drop_impl_did);
+    let dtor_self_type = tcx.bound_type_of(drop_impl_did).subst_identity();
     let dtor_predicates = tcx.predicates_of(drop_impl_did);
     match dtor_self_type.kind() {
         ty::Adt(adt_def, self_to_impl_substs) => {

compiler/rustc_hir_analysis/src/check/mod.rs

@@ -450,7 +450,7 @@ fn suggestion_signature(assoc: &ty::AssocItem, tcx: TyCtxt<'_>) -> String {
         }
         ty::AssocKind::Type => format!("type {} = Type;", assoc.name),
         ty::AssocKind::Const => {
-            let ty = tcx.type_of(assoc.def_id);
+            let ty = tcx.bound_type_of(assoc.def_id).subst_identity();
             let val = ty_kind_suggestion(ty).unwrap_or("value");
             format!("const {}: {} = {};", assoc.name, ty, val)
         }

compiler/rustc_hir_analysis/src/check/wfcheck.rs

@@ -874,7 +874,7 @@ fn check_param_wf(tcx: TyCtxt<'_>, param: &hir::GenericParam<'_>) {
 
         // Const parameters are well formed if their type is structural match.
         hir::GenericParamKind::Const { ty: hir_ty, default: _ } => {
-            let ty = tcx.type_of(param.def_id);
+            let ty = tcx.bound_type_of(param.def_id).subst_identity();
 
             if tcx.features().adt_const_params {
                 if let Some(non_structural_match_ty) =
@@ -1011,12 +1011,12 @@ fn check_associated_item(
 
         let self_ty = match item.container {
             ty::TraitContainer => tcx.types.self_param,
-            ty::ImplContainer => tcx.type_of(item.container_id(tcx)),
+            ty::ImplContainer => tcx.bound_type_of(item.container_id(tcx)).subst_identity(),
         };
 
         match item.kind {
             ty::AssocKind::Const => {
-                let ty = tcx.type_of(item.def_id);
+                let ty = tcx.bound_type_of(item.def_id).subst_identity();
                 let ty = wfcx.normalize(span, Some(WellFormedLoc::Ty(item_id)), ty);
                 wfcx.register_wf_obligation(span, loc, ty.into());
             }
@@ -1037,7 +1037,7 @@ fn check_associated_item(
                     check_associated_type_bounds(wfcx, item, span)
                 }
                 if item.defaultness(tcx).has_value() {
-                    let ty = tcx.type_of(item.def_id);
+                    let ty = tcx.bound_type_of(item.def_id).subst_identity();
                     let ty = wfcx.normalize(span, Some(WellFormedLoc::Ty(item_id)), ty);
                     wfcx.register_wf_obligation(span, loc, ty.into());
                 }
@@ -1070,7 +1070,11 @@ fn check_type_defn<'tcx>(tcx: TyCtxt<'tcx>, item: &hir::Item<'tcx>, all_sized: b
                 let field_id = field.did.expect_local();
                 let hir::FieldDef { ty: hir_ty, .. } =
                     tcx.hir().get_by_def_id(field_id).expect_field();
-                let ty = wfcx.normalize(hir_ty.span, None, tcx.type_of(field.did));
+                let ty = wfcx.normalize(
+                    hir_ty.span,
+                    None,
+                    tcx.bound_type_of(field.did).subst_identity(),
+                );
                 wfcx.register_wf_obligation(
                     hir_ty.span,
                     Some(WellFormedLoc::Ty(field_id)),
@@ -1082,7 +1086,7 @@ fn check_type_defn<'tcx>(tcx: TyCtxt<'tcx>, item: &hir::Item<'tcx>, all_sized: b
             // intermediate types must be sized.
             let needs_drop_copy = || {
                 packed && {
-                    let ty = tcx.type_of(variant.fields.last().unwrap().did);
+                    let ty = tcx.bound_type_of(variant.fields.last().unwrap().did).subst_identity();
                     let ty = tcx.erase_regions(ty);
                     if ty.needs_infer() {
                         tcx.sess
@@ -1104,7 +1108,11 @@ fn check_type_defn<'tcx>(tcx: TyCtxt<'tcx>, item: &hir::Item<'tcx>, all_sized: b
                 let field_id = field.did.expect_local();
                 let hir::FieldDef { ty: hir_ty, .. } =
                     tcx.hir().get_by_def_id(field_id).expect_field();
-                let ty = wfcx.normalize(hir_ty.span, None, tcx.type_of(field.did));
+                let ty = wfcx.normalize(
+                    hir_ty.span,
+                    None,
+                    tcx.bound_type_of(field.did).subst_identity(),
+                );
                 wfcx.register_bound(
                     traits::ObligationCause::new(
                         hir_ty.span,
@@ -1215,7 +1223,7 @@ fn check_item_type(tcx: TyCtxt<'_>, item_id: LocalDefId, ty_span: Span, allow_fo
     debug!("check_item_type: {:?}", item_id);
 
     enter_wf_checking_ctxt(tcx, ty_span, item_id, |wfcx| {
-        let ty = tcx.type_of(item_id);
+        let ty = tcx.bound_type_of(item_id).subst_identity();
         let item_ty = wfcx.normalize(ty_span, Some(WellFormedLoc::Ty(item_id)), ty);
 
         let mut forbid_unsized = true;
@@ -1300,7 +1308,7 @@ fn check_impl<'tcx>(
                 wfcx.register_obligations(obligations);
             }
             None => {
-                let self_ty = tcx.type_of(item.owner_id);
+                let self_ty = tcx.bound_type_of(item.owner_id).subst_identity();
                 let self_ty = wfcx.normalize(
                     item.span,
                     Some(WellFormedLoc::Ty(item.hir_id().expect_owner().def_id)),
@@ -1345,7 +1353,7 @@ fn check_where_clauses<'tcx>(wfcx: &WfCheckingCtxt<'_, 'tcx>, span: Span, def_id
         match param.kind {
             GenericParamDefKind::Type { .. } => {
                 if is_our_default(param) {
-                    let ty = tcx.type_of(param.def_id);
+                    let ty = tcx.bound_type_of(param.def_id).subst_identity();
                     // Ignore dependent defaults -- that is, where the default of one type
                     // parameter includes another (e.g., `<T, U = T>`). In those cases, we can't
                     // be sure if it will error or not as user might always specify the other.
@@ -1397,7 +1405,7 @@ fn check_where_clauses<'tcx>(wfcx: &WfCheckingCtxt<'_, 'tcx>, span: Span, def_id
             GenericParamDefKind::Type { .. } => {
                 // If the param has a default, ...
                 if is_our_default(param) {
-                    let default_ty = tcx.type_of(param.def_id);
+                    let default_ty = tcx.bound_type_of(param.def_id).subst_identity();
                     // ... and it's not a dependent default, ...
                     if !default_ty.needs_subst() {
                         // ... then substitute it with the default.
@@ -1813,7 +1821,7 @@ fn check_variances_for_type_defn<'tcx>(
     item: &hir::Item<'tcx>,
     hir_generics: &hir::Generics<'_>,
 ) {
-    let ty = tcx.type_of(item.owner_id);
+    let ty = tcx.bound_type_of(item.owner_id).subst_identity();
     if tcx.has_error_field(ty) {
         return;
     }

compiler/rustc_hir_analysis/src/coherence/builtin.rs

@@ -50,7 +50,7 @@ impl<'tcx> Checker<'tcx> {
 
 fn visit_implementation_of_drop(tcx: TyCtxt<'_>, impl_did: LocalDefId) {
     // Destructors only work on local ADT types.
-    match tcx.type_of(impl_did).kind() {
+    match tcx.bound_type_of(impl_did).subst_identity().kind() {
         ty::Adt(def, _) if def.did().is_local() => return,
         ty::Error(_) => return,
         _ => {}
@@ -64,7 +64,7 @@ fn visit_implementation_of_drop(tcx: TyCtxt<'_>, impl_did: LocalDefId) {
 fn visit_implementation_of_copy(tcx: TyCtxt<'_>, impl_did: LocalDefId) {
     debug!("visit_implementation_of_copy: impl_did={:?}", impl_did);
 
-    let self_type = tcx.type_of(impl_did);
+    let self_type = tcx.bound_type_of(impl_did).subst_identity();
     debug!("visit_implementation_of_copy: self_type={:?} (bound)", self_type);
 
     let param_env = tcx.param_env(impl_did);
@@ -206,7 +206,7 @@ fn visit_implementation_of_dispatch_from_dyn(tcx: TyCtxt<'_>, impl_did: LocalDef
 
     let dispatch_from_dyn_trait = tcx.require_lang_item(LangItem::DispatchFromDyn, Some(span));
 
-    let source = tcx.type_of(impl_did);
+    let source = tcx.bound_type_of(impl_did).subst_identity();
     assert!(!source.has_escaping_bound_vars());
     let target = {
         let trait_ref = tcx.impl_trait_ref(impl_did).unwrap().subst_identity();
@@ -370,7 +370,7 @@ pub fn coerce_unsized_info<'tcx>(tcx: TyCtxt<'tcx>, impl_did: DefId) -> CoerceUn
         tcx.sess.fatal(&format!("`CoerceUnsized` implementation {}", err.to_string()));
     });
 
-    let source = tcx.type_of(impl_did);
+    let source = tcx.bound_type_of(impl_did).subst_identity();
     let trait_ref = tcx.impl_trait_ref(impl_did).unwrap().subst_identity();
     assert_eq!(trait_ref.def_id, coerce_unsized_trait);
     let target = trait_ref.substs.type_at(1);
@@ -482,7 +482,7 @@ pub fn coerce_unsized_info<'tcx>(tcx: TyCtxt<'tcx>, impl_did: DefId) -> CoerceUn
                 .filter_map(|(i, f)| {
                     let (a, b) = (f.ty(tcx, substs_a), f.ty(tcx, substs_b));
 
-                    if tcx.type_of(f.did).is_phantom_data() {
+                    if tcx.bound_type_of(f.did).subst_identity().is_phantom_data() {
                         // Ignore PhantomData fields
                         return None;
                     }

compiler/rustc_hir_analysis/src/coherence/inherent_impls.rs

@@ -173,7 +173,7 @@ impl<'tcx> InherentCollect<'tcx> {
 
         let id = id.owner_id.def_id;
         let item_span = self.tcx.def_span(id);
-        let self_ty = self.tcx.type_of(id);
+        let self_ty = self.tcx.bound_type_of(id).subst_identity();
         match *self_ty.kind() {
             ty::Adt(def, _) => self.check_def_id(id, self_ty, def.did()),
             ty::Foreign(did) => self.check_def_id(id, self_ty, did),

compiler/rustc_hir_analysis/src/collect.rs

@@ -1143,8 +1143,8 @@ fn fn_sig(tcx: TyCtxt<'_>, def_id: DefId) -> ty::EarlyBinder<ty::PolyFnSig<'_>>
         }
 
         Ctor(data) | Variant(hir::Variant { data, .. }) if data.ctor().is_some() => {
-            let ty = tcx.type_of(tcx.hir().get_parent_item(hir_id));
+            let ty = tcx.bound_type_of(tcx.hir().get_parent_item(hir_id)).subst_identity();
-            let inputs = data.fields().iter().map(|f| tcx.type_of(f.def_id));
+            let inputs = data.fields().iter().map(|f| tcx.bound_type_of(f.def_id).subst_identity());
             ty::Binder::dummy(tcx.mk_fn_sig(
                 inputs,
                 ty,
@@ -1345,7 +1345,7 @@ fn impl_trait_ref(tcx: TyCtxt<'_>, def_id: DefId) -> Option<ty::EarlyBinder<ty::
         .of_trait
         .as_ref()
         .map(|ast_trait_ref| {
-            let selfty = tcx.type_of(def_id);
+            let selfty = tcx.bound_type_of(def_id).subst_identity();
             icx.astconv().instantiate_mono_trait_ref(
                 ast_trait_ref,
                 selfty,

compiler/rustc_hir_analysis/src/collect/lifetimes.rs

@@ -1804,7 +1804,7 @@ fn is_late_bound_map(
                     let mut walker = ConstrainedCollectorPostAstConv {
                         arg_is_constrained: vec![false; generics.params.len()].into_boxed_slice(),
                     };
-                    walker.visit_ty(self.tcx.type_of(alias_def));
+                    walker.visit_ty(self.tcx.bound_type_of(alias_def).subst_identity());
 
                     match segments.last() {
                         Some(hir::PathSegment { args: Some(args), .. }) => {

compiler/rustc_hir_analysis/src/collect/predicates_of.rs

@@ -251,7 +251,7 @@ fn gather_explicit_predicates_of(tcx: TyCtxt<'_>, def_id: DefId) -> ty::GenericP
     // in trait checking. See `setup_constraining_predicates`
     // for details.
     if let Node::Item(&Item { kind: ItemKind::Impl { .. }, .. }) = node {
-        let self_ty = tcx.type_of(def_id);
+        let self_ty = tcx.bound_type_of(def_id).subst_identity();
         let trait_ref = tcx.impl_trait_ref(def_id).map(ty::EarlyBinder::subst_identity);
         cgp::setup_constraining_predicates(
             tcx,

compiler/rustc_hir_analysis/src/collect/type_of.rs

@@ -377,7 +377,7 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> Ty<'_> {
 
         Node::Ctor(def) | Node::Variant(Variant { data: def, .. }) => match def {
             VariantData::Unit(..) | VariantData::Struct(..) => {
-                tcx.type_of(tcx.hir().get_parent_item(hir_id))
+                tcx.bound_type_of(tcx.hir().get_parent_item(hir_id)).subst_identity()
             }
             VariantData::Tuple(..) => {
                 let substs = InternalSubsts::identity_for_item(tcx, def_id.to_def_id());
@@ -394,7 +394,7 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> Ty<'_> {
         Node::AnonConst(_) if let Some(param) = tcx.opt_const_param_of(def_id) => {
             // We defer to `type_of` of the corresponding parameter
             // for generic arguments.
-            tcx.type_of(param)
+            tcx.bound_type_of(param).subst_identity()
         }
 
         Node::AnonConst(_) => {
@@ -456,7 +456,7 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> Ty<'_> {
                         def_id.to_def_id(),
                     );
                     if let Some(assoc_item) = assoc_item {
-                        tcx.type_of(assoc_item.def_id)
+                        tcx.bound_type_of(assoc_item.def_id).subst_identity()
                     } else {
                         // FIXME(associated_const_equality): add a useful error message here.
                         tcx.ty_error_with_message(
@@ -501,7 +501,7 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> Ty<'_> {
                     if let Some(param)
                         = assoc_item.map(|item| &tcx.generics_of(item.def_id).params[idx]).filter(|param| param.kind.is_ty_or_const())
                     {
-                        tcx.type_of(param.def_id)
+                        tcx.bound_type_of(param.def_id).subst_identity()
                     } else {
                         // FIXME(associated_const_equality): add a useful error message here.
                         tcx.ty_error_with_message(
@@ -515,7 +515,7 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> Ty<'_> {
                     def_id: param_def_id,
                     kind: GenericParamKind::Const { default: Some(ct), .. },
                     ..
-                }) if ct.hir_id == hir_id => tcx.type_of(param_def_id),
+                }) if ct.hir_id == hir_id => tcx.bound_type_of(param_def_id).subst_identity(),
 
                 x => tcx.ty_error_with_message(
                     DUMMY_SP,

compiler/rustc_hir_analysis/src/impl_wf_check.rs

@@ -70,7 +70,7 @@ pub fn provide(providers: &mut Providers) {
 
 fn enforce_impl_params_are_constrained(tcx: TyCtxt<'_>, impl_def_id: LocalDefId) {
     // Every lifetime used in an associated type must be constrained.
-    let impl_self_ty = tcx.type_of(impl_def_id);
+    let impl_self_ty = tcx.bound_type_of(impl_def_id).subst_identity();
     if impl_self_ty.references_error() {
         // Don't complain about unconstrained type params when self ty isn't known due to errors.
         // (#36836)
@@ -104,7 +104,7 @@ fn enforce_impl_params_are_constrained(tcx: TyCtxt<'_>, impl_def_id: LocalDefId)
             match item.kind {
                 ty::AssocKind::Type => {
                     if item.defaultness(tcx).has_value() {
-                        cgp::parameters_for(&tcx.type_of(def_id), true)
+                        cgp::parameters_for(&tcx.bound_type_of(def_id).subst_identity(), true)
                     } else {
                         Vec::new()
                     }

compiler/rustc_hir_analysis/src/lib.rs

@@ -187,7 +187,7 @@ fn check_main_fn_ty(tcx: TyCtxt<'_>, main_def_id: DefId) {
 
     fn main_fn_diagnostics_def_id(tcx: TyCtxt<'_>, def_id: DefId, sp: Span) -> LocalDefId {
         if let Some(local_def_id) = def_id.as_local() {
-            let hir_type = tcx.type_of(local_def_id);
+            let hir_type = tcx.bound_type_of(local_def_id).subst_identity();
             if !matches!(hir_type.kind(), ty::FnDef(..)) {
                 span_bug!(sp, "main has a non-function type: found `{}`", hir_type);
             }
@@ -366,7 +366,7 @@ fn check_start_fn_ty(tcx: TyCtxt<'_>, start_def_id: DefId) {
     let start_def_id = start_def_id.expect_local();
     let start_id = tcx.hir().local_def_id_to_hir_id(start_def_id);
     let start_span = tcx.def_span(start_def_id);
-    let start_t = tcx.type_of(start_def_id);
+    let start_t = tcx.bound_type_of(start_def_id).subst_identity();
     match start_t.kind() {
         ty::FnDef(..) => {
             if let Some(Node::Item(it)) = tcx.hir().find(start_id) {

compiler/rustc_hir_analysis/src/outlives/implicit_infer.rs

@@ -46,7 +46,7 @@ pub(super) fn infer_predicates(
                         // For field of type &'a T (reference) or Adt
                         // (struct/enum/union) there will be outlive
                         // requirements for adt_def.
-                        let field_ty = tcx.type_of(field_def.did);
+                        let field_ty = tcx.bound_type_of(field_def.did).subst_identity();
                         let field_span = tcx.def_span(field_def.did);
                         insert_required_predicates_to_be_wf(
                             tcx,

compiler/rustc_hir_analysis/src/variance/constraints.rs

@@ -101,7 +101,7 @@ impl<'a, 'tcx> ConstraintContext<'a, 'tcx> {
 
         let inferred_start = self.terms_cx.inferred_starts[&def_id];
         let current_item = &CurrentItem { inferred_start };
-        match tcx.type_of(def_id).kind() {
+        match tcx.bound_type_of(def_id).subst_identity().kind() {
             ty::Adt(def, _) => {
                 // Not entirely obvious: constraints on structs/enums do not
                 // affect the variance of their type parameters. See discussion
@@ -112,7 +112,7 @@ impl<'a, 'tcx> ConstraintContext<'a, 'tcx> {
                 for field in def.all_fields() {
                     self.add_constraints_from_ty(
                         current_item,
-                        tcx.type_of(field.did),
+                        tcx.bound_type_of(field.did).subst_identity(),
                         self.covariant,
                     );
                 }

compiler/rustc_hir_analysis/src/variance/solve.rs

@@ -103,7 +103,7 @@ impl<'a, 'tcx> SolveContext<'a, 'tcx> {
                 self.enforce_const_invariance(generics, variances);
 
                 // Functions are permitted to have unused generic parameters: make those invariant.
-                if let ty::FnDef(..) = tcx.type_of(def_id).kind() {
+                if let ty::FnDef(..) = tcx.bound_type_of(def_id).subst_identity().kind() {
                     for variance in variances.iter_mut() {
                         if *variance == ty::Bivariant {
                             *variance = ty::Invariant;

compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs

@@ -1130,7 +1130,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             .unwrap_or(false);
 
         let (res, self_ctor_substs) = if let Res::SelfCtor(impl_def_id) = res {
-            let ty = self.handle_raw_ty(span, tcx.at(span).type_of(impl_def_id));
+            let ty =
+                self.handle_raw_ty(span, tcx.at(span).bound_type_of(impl_def_id).subst_identity());
             match ty.normalized.ty_adt_def() {
                 Some(adt_def) if adt_def.has_ctor() => {
                     let (ctor_kind, ctor_def_id) = adt_def.non_enum_variant().ctor.unwrap();
@@ -1226,7 +1227,13 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                     }
                     (GenericParamDefKind::Const { .. }, GenericArg::Infer(inf)) => {
                         let tcx = self.fcx.tcx();
-                        self.fcx.ct_infer(tcx.type_of(param.def_id), Some(param), inf.span).into()
+                        self.fcx
+                            .ct_infer(
+                                tcx.bound_type_of(param.def_id).subst_identity(),
+                                Some(param),
+                                inf.span,
+                            )
+                            .into()
                     }
                     _ => unreachable!(),
                 }

compiler/rustc_hir_typeck/src/fn_ctxt/adjust_fulfillment_errors.rs

@@ -312,7 +312,10 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 // same rules that check_expr_struct uses for macro hygiene.
                 if self.tcx.adjust_ident(expr_field.ident, variant_def_id) == field.ident(self.tcx)
                 {
-                    return Some((expr_field.expr, self.tcx.type_of(field.did)));
+                    return Some((
+                        expr_field.expr,
+                        self.tcx.bound_type_of(field.did).subst_identity(),
+                    ));
                 }
             }
         }
@@ -339,7 +342,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         receiver: Option<&'tcx hir::Expr<'tcx>>,
         args: &'tcx [hir::Expr<'tcx>],
     ) -> bool {
-        let ty = self.tcx.type_of(def_id);
+        let ty = self.tcx.bound_type_of(def_id).subst_identity();
         if !ty.is_fn() {
             return false;
         }

compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs

@@ -1378,7 +1378,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             // Same item
             return false;
         }
-        let item_ty = self.tcx.type_of(item.def_id);
+        let item_ty = self.tcx.bound_type_of(item.def_id).subst_identity();
         // FIXME(compiler-errors): This check is *so* rudimentary
         if item_ty.needs_subst() {
             return false;

compiler/rustc_hir_typeck/src/lib.rs

@@ -154,7 +154,7 @@ fn typeck_const_arg<'tcx>(
     tcx: TyCtxt<'tcx>,
     (did, param_did): (LocalDefId, DefId),
 ) -> &ty::TypeckResults<'tcx> {
-    let fallback = move || tcx.type_of(param_did);
+    let fallback = move || tcx.bound_type_of(param_did).subst_identity();
     typeck_with_fallback(tcx, did, fallback)
 }
 
@@ -162,7 +162,7 @@ fn typeck<'tcx>(tcx: TyCtxt<'tcx>, def_id: LocalDefId) -> &ty::TypeckResults<'tc
     if let Some(param_did) = tcx.opt_const_param_of(def_id) {
         tcx.typeck_const_arg((def_id, param_did))
     } else {
-        let fallback = move || tcx.type_of(def_id.to_def_id());
+        let fallback = move || tcx.bound_type_of(def_id.to_def_id()).subst_identity();
         typeck_with_fallback(tcx, def_id, fallback)
     }
 }

compiler/rustc_hir_typeck/src/method/confirm.rs

@@ -384,7 +384,13 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> {
                     }
                     (GenericParamDefKind::Const { .. }, GenericArg::Infer(inf)) => {
                         let tcx = self.cfcx.tcx();
-                        self.cfcx.ct_infer(tcx.type_of(param.def_id), Some(param), inf.span).into()
+                        self.cfcx
+                            .ct_infer(
+                                tcx.bound_type_of(param.def_id).subst_identity(),
+                                Some(param),
+                                inf.span,
+                            )
+                            .into()
                     }
                     _ => unreachable!(),
                 }

compiler/rustc_hir_typeck/src/method/probe.rs

@@ -1958,7 +1958,8 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
                     kind: ConstVariableOriginKind::SubstitutionPlaceholder,
                     span,
                 };
-                self.next_const_var(self.tcx.type_of(param.def_id), origin).into()
+                self.next_const_var(self.tcx.bound_type_of(param.def_id).subst_identity(), origin)
+                    .into()
             }
         })
     }

compiler/rustc_hir_typeck/src/method/suggest.rs

@@ -906,8 +906,14 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                                         // different from the received one
                                         // So we avoid suggestion method with Box<Self>
                                         // for instance
-                                        self.tcx.at(span).type_of(*def_id) != rcvr_ty
+                                        self.tcx.at(span).bound_type_of(*def_id).subst_identity()
-                                            && self.tcx.at(span).type_of(*def_id) != rcvr_ty
+                                            != rcvr_ty
+                                            && self
+                                                .tcx
+                                                .at(span)
+                                                .bound_type_of(*def_id)
+                                                .subst_identity()
+                                                != rcvr_ty
                                     }
                                     (Mode::Path, false, _) => true,
                                     _ => false,
@@ -927,7 +933,10 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                             .iter()
                             .take(limit)
                             .map(|impl_item| {
-                                format!("- `{}`", self.tcx.at(span).type_of(*impl_item))
+                                format!(
+                                    "- `{}`",
+                                    self.tcx.at(span).bound_type_of(*impl_item).subst_identity()
+                                )
                             })
                             .collect::<Vec<_>>()
                             .join("\n");
@@ -1104,7 +1113,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                         None
                     };
 
-                    let impl_ty = self.tcx.at(span).type_of(impl_did);
+                    let impl_ty = self.tcx.at(span).bound_type_of(impl_did).subst_identity();
 
                     let insertion = match self.tcx.impl_trait_ref(impl_did) {
                         None => String::new(),
@@ -1233,7 +1242,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             // When the "method" is resolved through dereferencing, we really want the
             // original type that has the associated function for accurate suggestions.
             // (#61411)
-            let impl_ty = self.tcx.type_of(*impl_did);
+            let impl_ty = self.tcx.bound_type_of(*impl_did).subst_identity();
             let target_ty = self
                 .autoderef(sugg_span, rcvr_ty)
                 .find(|(rcvr_ty, _)| {

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/mismatched_static_lifetime.rs

@@ -72,7 +72,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
             };
 
             // Next, let's figure out the set of trait objects with implicit static bounds
-            let ty = self.tcx().type_of(*impl_def_id);
+            let ty = self.tcx().bound_type_of(*impl_def_id).subst_identity();
             let mut v = super::static_impl_trait::TraitObjectVisitor(FxIndexSet::default());
             v.visit_ty(ty);
             let mut traits = vec![];

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/util.rs

@@ -123,7 +123,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
         br: ty::BoundRegionKind,
         hir_sig: &hir::FnSig<'_>,
     ) -> Option<Span> {
-        let fn_ty = self.tcx().type_of(scope_def_id);
+        let fn_ty = self.tcx().bound_type_of(scope_def_id).subst_identity();
         if let ty::FnDef(_, _) = fn_ty.kind() {
             let ret_ty = fn_ty.fn_sig(self.tcx()).output();
             let span = hir_sig.decl.output.span();

compiler/rustc_infer/src/infer/mod.rs

@@ -1166,7 +1166,9 @@ impl<'tcx> InferCtxt<'tcx> {
                         origin,
                         val: ConstVariableValue::Unknown { universe: self.universe() },
                     });
-                self.tcx.mk_const(const_var_id, self.tcx.type_of(param.def_id)).into()
+                self.tcx
+                    .mk_const(const_var_id, self.tcx.bound_type_of(param.def_id).subst_identity())
+                    .into()
             }
         }
     }

compiler/rustc_lint/src/builtin.rs

@@ -182,9 +182,11 @@ impl<'tcx> LateLintPass<'tcx> for BoxPointers {
             | hir::ItemKind::TyAlias(..)
             | hir::ItemKind::Enum(..)
             | hir::ItemKind::Struct(..)
-            | hir::ItemKind::Union(..) => {
+            | hir::ItemKind::Union(..) => self.check_heap_type(
-                self.check_heap_type(cx, it.span, cx.tcx.type_of(it.owner_id))
+                cx,
-            }
+                it.span,
+                cx.tcx.bound_type_of(it.owner_id).subst_identity(),
+            ),
             _ => (),
         }
 
@@ -192,7 +194,11 @@ impl<'tcx> LateLintPass<'tcx> for BoxPointers {
         match it.kind {
             hir::ItemKind::Struct(ref struct_def, _) | hir::ItemKind::Union(ref struct_def, _) => {
                 for field in struct_def.fields() {
-                    self.check_heap_type(cx, field.span, cx.tcx.type_of(field.def_id));
+                    self.check_heap_type(
+                        cx,
+                        field.span,
+                        cx.tcx.bound_type_of(field.def_id).subst_identity(),
+                    );
                 }
             }
             _ => (),
@@ -589,7 +595,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingDoc {
             // If the method is an impl for an item with docs_hidden, don't doc.
             MethodLateContext::PlainImpl => {
                 let parent = cx.tcx.hir().get_parent_item(impl_item.hir_id());
-                let impl_ty = cx.tcx.type_of(parent);
+                let impl_ty = cx.tcx.bound_type_of(parent).subst_identity();
                 let outerdef = match impl_ty.kind() {
                     ty::Adt(def, _) => Some(def.did()),
                     ty::Foreign(def_id) => Some(*def_id),
@@ -698,7 +704,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingCopyImplementations {
         // and recommending Copy might be a bad idea.
         for field in def.all_fields() {
             let did = field.did;
-            if cx.tcx.type_of(did).is_unsafe_ptr() {
+            if cx.tcx.bound_type_of(did).subst_identity().is_unsafe_ptr() {
                 return;
             }
         }
@@ -798,7 +804,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingDebugImplementations {
         if self.impling_types.is_none() {
             let mut impls = LocalDefIdSet::default();
             cx.tcx.for_each_impl(debug, |d| {
-                if let Some(ty_def) = cx.tcx.type_of(d).ty_adt_def() {
+                if let Some(ty_def) = cx.tcx.bound_type_of(d).subst_identity().ty_adt_def() {
                     if let Some(def_id) = ty_def.did().as_local() {
                         impls.insert(def_id);
                     }
@@ -2852,8 +2858,8 @@ impl ClashingExternDeclarations {
                                     structurally_same_type_impl(
                                         seen_types,
                                         cx,
-                                        tcx.type_of(a_did),
+                                        tcx.bound_type_of(a_did).subst_identity(),
-                                        tcx.type_of(b_did),
+                                        tcx.bound_type_of(b_did).subst_identity(),
                                         ckind,
                                     )
                                 },
@@ -2953,8 +2959,8 @@ impl<'tcx> LateLintPass<'tcx> for ClashingExternDeclarations {
         if let ForeignItemKind::Fn(..) = this_fi.kind {
             let tcx = cx.tcx;
             if let Some(existing_did) = self.insert(tcx, this_fi) {
-                let existing_decl_ty = tcx.type_of(existing_did);
+                let existing_decl_ty = tcx.bound_type_of(existing_did).skip_binder();
-                let this_decl_ty = tcx.type_of(this_fi.owner_id);
+                let this_decl_ty = tcx.bound_type_of(this_fi.owner_id).subst_identity();
                 debug!(
                     "ClashingExternDeclarations: Comparing existing {:?}: {:?} to this {:?}: {:?}",
                     existing_did, existing_decl_ty, this_fi.owner_id, this_decl_ty

compiler/rustc_lint/src/deref_into_dyn_supertrait.rs

@@ -59,7 +59,7 @@ impl<'tcx> LateLintPass<'tcx> for DerefIntoDynSupertrait {
         // `Deref` is being implemented for `t`
         if let hir::ItemKind::Impl(impl_) = item.kind
             && let Some(trait_) = &impl_.of_trait
-            && let t = cx.tcx.type_of(item.owner_id)
+            && let t = cx.tcx.bound_type_of(item.owner_id).subst_identity()
             && let opt_did @ Some(did) = trait_.trait_def_id()
             && opt_did == cx.tcx.lang_items().deref_trait()
             // `t` is `dyn t_principal`

compiler/rustc_lint/src/internal.rs

@@ -216,7 +216,7 @@ fn is_ty_or_ty_ctxt(cx: &LateContext<'_>, path: &Path<'_>) -> Option<String> {
         }
         // Only lint on `&Ty` and `&TyCtxt` if it is used outside of a trait.
         Res::SelfTyAlias { alias_to: did, is_trait_impl: false, .. } => {
-            if let ty::Adt(adt, substs) = cx.tcx.type_of(did).kind() {
+            if let ty::Adt(adt, substs) = cx.tcx.bound_type_of(did).subst_identity().kind() {
                 if let Some(name @ (sym::Ty | sym::TyCtxt)) = cx.tcx.get_diagnostic_name(adt.did())
                 {
                     // NOTE: This path is currently unreachable as `Ty<'tcx>` is

compiler/rustc_lint/src/pass_by_value.rs

@@ -50,7 +50,7 @@ fn path_for_pass_by_value(cx: &LateContext<'_>, ty: &hir::Ty<'_>) -> Option<Stri
                 return Some(format!("{}{}", name, gen_args(cx, path_segment)));
             }
             Res::SelfTyAlias { alias_to: did, is_trait_impl: false, .. } => {
-                if let ty::Adt(adt, substs) = cx.tcx.type_of(did).kind() {
+                if let ty::Adt(adt, substs) = cx.tcx.bound_type_of(did).subst_identity().kind() {
                     if cx.tcx.has_attr(adt.did(), sym::rustc_pass_by_value) {
                         return Some(cx.tcx.def_path_str_with_substs(adt.did(), substs));
                     }

compiler/rustc_lint/src/types.rs

@@ -651,7 +651,7 @@ pub fn transparent_newtype_field<'a, 'tcx>(
 ) -> Option<&'a ty::FieldDef> {
     let param_env = tcx.param_env(variant.def_id);
     variant.fields.iter().find(|field| {
-        let field_ty = tcx.type_of(field.did);
+        let field_ty = tcx.bound_type_of(field.did).subst_identity();
         let is_zst = tcx.layout_of(param_env.and(field_ty)).map_or(false, |layout| layout.is_zst());
         !is_zst
     })
@@ -1240,7 +1240,7 @@ impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> {
     }
 
     fn check_foreign_static(&mut self, id: hir::OwnerId, span: Span) {
-        let ty = self.cx.tcx.type_of(id);
+        let ty = self.cx.tcx.bound_type_of(id).subst_identity();
         self.check_type_for_ffi_and_report_errors(span, ty, true, false);
     }
 
@@ -1301,7 +1301,7 @@ declare_lint_pass!(VariantSizeDifferences => [VARIANT_SIZE_DIFFERENCES]);
 impl<'tcx> LateLintPass<'tcx> for VariantSizeDifferences {
     fn check_item(&mut self, cx: &LateContext<'_>, it: &hir::Item<'_>) {
         if let hir::ItemKind::Enum(ref enum_definition, _) = it.kind {
-            let t = cx.tcx.type_of(it.owner_id);
+            let t = cx.tcx.bound_type_of(it.owner_id).subst_identity();
             let ty = cx.tcx.erase_regions(t);
             let Ok(layout) = cx.layout_of(ty) else { return };
             let Variants::Multiple {
@@ -1421,7 +1421,7 @@ impl InvalidAtomicOrdering {
             && recognized_names.contains(&method_path.ident.name)
             && let Some(m_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id)
             && let Some(impl_did) = cx.tcx.impl_of_method(m_def_id)
-            && let Some(adt) = cx.tcx.type_of(impl_did).ty_adt_def()
+            && let Some(adt) = cx.tcx.bound_type_of(impl_did).subst_identity().ty_adt_def()
             // skip extension traits, only lint functions from the standard library
             && cx.tcx.trait_id_of_impl(impl_did).is_none()
             && let parent = cx.tcx.parent(adt.did())

compiler/rustc_metadata/src/native_libs.rs

@@ -498,7 +498,8 @@ impl<'tcx> Collector<'tcx> {
     fn i686_arg_list_size(&self, item: &hir::ForeignItemRef) -> usize {
         let argument_types: &List<Ty<'_>> = self.tcx.erase_late_bound_regions(
             self.tcx
-                .type_of(item.id.owner_id)
+                .bound_type_of(item.id.owner_id)
+                .subst_identity()
                 .fn_sig(self.tcx)
                 .inputs()
                 .map_bound(|slice| self.tcx.mk_type_list(slice.iter())),

compiler/rustc_middle/src/hir/mod.rs

@@ -104,7 +104,7 @@ impl<'tcx> TyCtxt<'tcx> {
         self.impl_trait_ref(def_id)
             .map(|t| t.subst_identity())
             .map(ImplSubject::Trait)
-            .unwrap_or_else(|| ImplSubject::Inherent(self.type_of(def_id)))
+            .unwrap_or_else(|| ImplSubject::Inherent(self.bound_type_of(def_id).subst_identity()))
     }
 }
 

compiler/rustc_middle/src/mir/mod.rs

@@ -2497,7 +2497,7 @@ impl<'tcx> ConstantKind<'tcx> {
         };
         debug!("expr.kind: {:?}", expr.kind);
 
-        let ty = tcx.type_of(def.def_id_for_type_of());
+        let ty = tcx.bound_type_of(def.def_id_for_type_of()).subst_identity();
         debug!(?ty);
 
         // FIXME(const_generics): We currently have to special case parameters because `min_const_generics`

compiler/rustc_middle/src/mir/tcx.rs

@@ -165,7 +165,7 @@ impl<'tcx> Rvalue<'tcx> {
                 tcx.mk_array_with_const_len(operand.ty(local_decls, tcx), count)
             }
             Rvalue::ThreadLocalRef(did) => {
-                let static_ty = tcx.type_of(did);
+                let static_ty = tcx.bound_type_of(did).subst_identity();
                 if tcx.is_mutable_static(did) {
                     tcx.mk_mut_ptr(static_ty)
                 } else if tcx.is_foreign_item(did) {

compiler/rustc_middle/src/traits/specialization_graph.rs

@@ -263,7 +263,9 @@ pub fn ancestors(
 
     if let Some(reported) = specialization_graph.has_errored {
         Err(reported)
-    } else if let Err(reported) = tcx.type_of(start_from_impl).error_reported() {
+    } else if let Err(reported) =
+        tcx.bound_type_of(start_from_impl).subst_identity().error_reported()
+    {
         Err(reported)
     } else {
         Ok(Ancestors {

compiler/rustc_middle/src/ty/assoc.rs

@@ -83,7 +83,11 @@ impl AssocItem {
             }
             ty::AssocKind::Type => format!("type {};", self.name),
             ty::AssocKind::Const => {
-                format!("const {}: {:?};", self.name, tcx.type_of(self.def_id))
+                format!(
+                    "const {}: {:?};",
+                    self.name,
+                    tcx.bound_type_of(self.def_id).subst_identity()
+                )
             }
         }
     }

compiler/rustc_middle/src/ty/consts.rs

@@ -71,7 +71,7 @@ impl<'tcx> Const<'tcx> {
         let expr = &tcx.hir().body(body_id).value;
         debug!(?expr);
 
-        let ty = tcx.type_of(def.def_id_for_type_of());
+        let ty = tcx.bound_type_of(def.def_id_for_type_of()).subst_identity();
 
         match Self::try_eval_lit_or_param(tcx, ty, expr) {
             Some(v) => v,

compiler/rustc_middle/src/ty/context.rs

@@ -1149,7 +1149,7 @@ impl<'tcx> TyCtxt<'tcx> {
             _ => return None,
         }
 
-        let ret_ty = self.type_of(scope_def_id);
+        let ret_ty = self.bound_type_of(scope_def_id).subst_identity();
         match ret_ty.kind() {
             ty::FnDef(_, _) => {
                 let sig = ret_ty.fn_sig(self);
@@ -2002,7 +2002,7 @@ impl<'tcx> TyCtxt<'tcx> {
             GenericParamDefKind::Const { .. } => self
                 .mk_const(
                     ParamConst { index: param.index, name: param.name },
-                    self.type_of(param.def_id),
+                    self.bound_type_of(param.def_id).subst_identity(),
                 )
                 .into(),
         }

compiler/rustc_middle/src/ty/diagnostics.rs

@@ -481,8 +481,9 @@ impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for IsSuggestableVisitor<'tcx> {
 
             Alias(Opaque, AliasTy { def_id, .. }) => {
                 let parent = self.tcx.parent(def_id);
+                let parent_ty = self.tcx.bound_type_of(parent).subst_identity();
                 if let DefKind::TyAlias | DefKind::AssocTy = self.tcx.def_kind(parent)
-                    && let Alias(Opaque, AliasTy { def_id: parent_opaque_def_id, .. }) = *self.tcx.type_of(parent).kind()
+                    && let Alias(Opaque, AliasTy { def_id: parent_opaque_def_id, .. }) = *parent_ty.kind()
                     && parent_opaque_def_id == def_id
                 {
                     // Okay
@@ -564,8 +565,9 @@ impl<'tcx> FallibleTypeFolder<TyCtxt<'tcx>> for MakeSuggestableFolder<'tcx> {
 
             Alias(Opaque, AliasTy { def_id, .. }) => {
                 let parent = self.tcx.parent(def_id);
+                let parent_ty = self.tcx.bound_type_of(parent).subst_identity();
                 if let hir::def::DefKind::TyAlias | hir::def::DefKind::AssocTy = self.tcx.def_kind(parent)
-                    && let Alias(Opaque, AliasTy { def_id: parent_opaque_def_id, .. }) = *self.tcx.type_of(parent).kind()
+                    && let Alias(Opaque, AliasTy { def_id: parent_opaque_def_id, .. }) = *parent_ty.kind()
                     && parent_opaque_def_id == def_id
                 {
                     t

compiler/rustc_middle/src/ty/inhabitedness/mod.rs

@@ -87,7 +87,7 @@ impl<'tcx> VariantDef {
         InhabitedPredicate::all(
             tcx,
             self.fields.iter().map(|field| {
-                let pred = tcx.type_of(field.did).inhabited_predicate(tcx);
+                let pred = tcx.bound_type_of(field.did).subst_identity().inhabited_predicate(tcx);
                 if adt.is_enum() {
                     return pred;
                 }

compiler/rustc_middle/src/ty/instance.rs

@@ -102,8 +102,8 @@ impl<'tcx> Instance<'tcx> {
     /// Returns the `Ty` corresponding to this `Instance`, with generic substitutions applied and
     /// lifetimes erased, allowing a `ParamEnv` to be specified for use during normalization.
     pub fn ty(&self, tcx: TyCtxt<'tcx>, param_env: ty::ParamEnv<'tcx>) -> Ty<'tcx> {
-        let ty = tcx.type_of(self.def.def_id());
+        let ty = tcx.bound_type_of(self.def.def_id());
-        tcx.subst_and_normalize_erasing_regions(self.substs, param_env, ty)
+        tcx.subst_and_normalize_erasing_regions(self.substs, param_env, ty.skip_binder())
     }
 
     /// Finds a crate that contains a monomorphization of this instance that
@@ -662,7 +662,7 @@ fn polymorphize<'tcx>(
     let def_id = instance.def_id();
     let upvars_ty = if tcx.is_closure(def_id) {
         Some(substs.as_closure().tupled_upvars_ty())
-    } else if tcx.type_of(def_id).is_generator() {
+    } else if tcx.bound_type_of(def_id).skip_binder().is_generator() {
         Some(substs.as_generator().tupled_upvars_ty())
     } else {
         None

compiler/rustc_middle/src/ty/print/pretty.rs

@@ -754,7 +754,7 @@ pub trait PrettyPrinter<'tcx>:
                         // NOTE: I know we should check for NO_QUERIES here, but it's alright.
                         // `type_of` on a type alias or assoc type should never cause a cycle.
                         if let ty::Alias(ty::Opaque, ty::AliasTy { def_id: d, .. }) =
-                            *self.tcx().type_of(parent).kind()
+                            *self.tcx().bound_type_of(parent).subst_identity().kind()
                         {
                             if d == def_id {
                                 // If the type alias directly starts with the `impl` of the

compiler/rustc_middle/src/ty/trait_def.rs

@@ -225,7 +225,7 @@ pub(super) fn trait_impls_of_provider(tcx: TyCtxt<'_>, trait_id: DefId) -> Trait
     for &impl_def_id in tcx.hir().trait_impls(trait_id) {
         let impl_def_id = impl_def_id.to_def_id();
 
-        let impl_self_ty = tcx.type_of(impl_def_id);
+        let impl_self_ty = tcx.bound_type_of(impl_def_id).subst_identity();
         if impl_self_ty.references_error() {
             continue;
         }

compiler/rustc_middle/src/ty/util.rs

@@ -362,7 +362,7 @@ impl<'tcx> TyCtxt<'tcx> {
         let drop_trait = self.lang_items().drop_trait()?;
         self.ensure().coherent_trait(drop_trait);
 
-        let ty = self.type_of(adt_did);
+        let ty = self.bound_type_of(adt_did).subst_identity();
         let (did, constness) = self.find_map_relevant_impl(drop_trait, ty, |impl_did| {
             if let Some(item_id) = self.associated_item_def_ids(impl_did).first() {
                 if validate(self, impl_did).is_ok() {
@@ -415,12 +415,12 @@ impl<'tcx> TyCtxt<'tcx> {
         // <P1, P2, P0>, and then look up which of the impl substs refer to
         // parameters marked as pure.
 
-        let impl_substs = match *self.type_of(impl_def_id).kind() {
+        let impl_substs = match *self.bound_type_of(impl_def_id).subst_identity().kind() {
             ty::Adt(def_, substs) if def_ == def => substs,
             _ => bug!(),
         };
 
-        let item_substs = match *self.type_of(def.did()).kind() {
+        let item_substs = match *self.bound_type_of(def.did()).subst_identity().kind() {
             ty::Adt(def_, substs) if def_ == def => substs,
             _ => bug!(),
         };
@@ -602,7 +602,10 @@ impl<'tcx> TyCtxt<'tcx> {
     /// Get the type of the pointer to the static that we use in MIR.
     pub fn static_ptr_ty(self, def_id: DefId) -> Ty<'tcx> {
         // Make sure that any constants in the static's type are evaluated.
-        let static_ty = self.normalize_erasing_regions(ty::ParamEnv::empty(), self.type_of(def_id));
+        let static_ty = self.normalize_erasing_regions(
+            ty::ParamEnv::empty(),
+            self.bound_type_of(def_id).subst_identity(),
+        );
 
         // Make sure that accesses to unsafe statics end up using raw pointers.
         // For thread-locals, this needs to be kept in sync with `Rvalue::ty`.

compiler/rustc_mir_build/src/build/mod.rs

@@ -643,7 +643,7 @@ fn construct_error(
     let num_params = match body_owner_kind {
         hir::BodyOwnerKind::Fn => tcx.fn_sig(def).skip_binder().inputs().skip_binder().len(),
         hir::BodyOwnerKind::Closure => {
-            let ty = tcx.type_of(def);
+            let ty = tcx.bound_type_of(def).subst_identity();
             match ty.kind() {
                 ty::Closure(_, substs) => {
                     1 + substs.as_closure().sig().inputs().skip_binder().len()

compiler/rustc_mir_transform/src/abort_unwinding_calls.rs

@@ -41,7 +41,7 @@ impl<'tcx> MirPass<'tcx> for AbortUnwindingCalls {
         //
         // Here we test for this function itself whether its ABI allows
         // unwinding or not.
-        let body_ty = tcx.type_of(def_id);
+        let body_ty = tcx.bound_type_of(def_id).skip_binder();
         let body_abi = match body_ty.kind() {
             ty::FnDef(..) => body_ty.fn_sig(tcx).abi(),
             ty::Closure(..) => Abi::RustCall,

compiler/rustc_mir_transform/src/const_prop.rs

@@ -82,7 +82,7 @@ impl<'tcx> MirPass<'tcx> for ConstProp {
             return;
         }
 
-        let is_generator = tcx.type_of(def_id.to_def_id()).is_generator();
+        let is_generator = tcx.bound_type_of(def_id.to_def_id()).subst_identity().is_generator();
         // FIXME(welseywiser) const prop doesn't work on generators because of query cycles
         // computing their layout.
         if is_generator {

compiler/rustc_mir_transform/src/const_prop_lint.rs

@@ -57,7 +57,7 @@ impl<'tcx> MirLint<'tcx> for ConstProp {
             return;
         }
 
-        let is_generator = tcx.type_of(def_id.to_def_id()).is_generator();
+        let is_generator = tcx.bound_type_of(def_id.to_def_id()).subst_identity().is_generator();
         // FIXME(welseywiser) const prop doesn't work on generators because of query cycles
         // computing their layout.
         if is_generator {

compiler/rustc_mir_transform/src/deduce_param_attrs.rs

@@ -163,7 +163,7 @@ pub fn deduced_param_attrs<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId) -> &'tcx [Ded
 
     // Codegen won't use this information for anything if all the function parameters are passed
     // directly. Detect that and bail, for compilation speed.
-    let fn_ty = tcx.type_of(def_id);
+    let fn_ty = tcx.bound_type_of(def_id).subst_identity();
     if matches!(fn_ty.kind(), ty::FnDef(..)) {
         if fn_ty
             .fn_sig(tcx)

compiler/rustc_mir_transform/src/elaborate_box_derefs.rs

@@ -93,7 +93,7 @@ impl<'tcx> MirPass<'tcx> for ElaborateBoxDerefs {
         if let Some(def_id) = tcx.lang_items().owned_box() {
             let unique_did = tcx.adt_def(def_id).non_enum_variant().fields[0].did;
 
-            let Some(nonnull_def) = tcx.type_of(unique_did).ty_adt_def() else {
+            let Some(nonnull_def) = tcx.bound_type_of(unique_did).subst_identity().ty_adt_def() else {
                 span_bug!(tcx.def_span(unique_did), "expected Box to contain Unique")
             };
 

compiler/rustc_mir_transform/src/ffi_unwind_calls.rs

@@ -49,7 +49,7 @@ fn has_ffi_unwind_calls(tcx: TyCtxt<'_>, local_def_id: LocalDefId) -> bool {
 
     let body = &*tcx.mir_built(ty::WithOptConstParam::unknown(local_def_id)).borrow();
 
-    let body_ty = tcx.type_of(def_id);
+    let body_ty = tcx.bound_type_of(def_id).skip_binder();
     let body_abi = match body_ty.kind() {
         ty::FnDef(..) => body_ty.fn_sig(tcx).abi(),
         ty::Closure(..) => Abi::RustCall,

compiler/rustc_mir_transform/src/remove_zsts.rs

@@ -13,7 +13,7 @@ impl<'tcx> MirPass<'tcx> for RemoveZsts {
 
     fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
         // Avoid query cycles (generators require optimized MIR for layout).
-        if tcx.type_of(body.source.def_id()).is_generator() {
+        if tcx.bound_type_of(body.source.def_id()).subst_identity().is_generator() {
             return;
         }
         let param_env = tcx.param_env(body.source.def_id());

compiler/rustc_mir_transform/src/shim.rs

@@ -692,7 +692,7 @@ fn build_call_shim<'tcx>(
 
         // `FnDef` call with optional receiver.
         CallKind::Direct(def_id) => {
-            let ty = tcx.type_of(def_id);
+            let ty = tcx.bound_type_of(def_id).subst_identity();
             (
                 Operand::Constant(Box::new(Constant {
                     span,

compiler/rustc_monomorphize/src/partitioning/default.rs

@@ -308,7 +308,7 @@ fn characteristic_def_id_of_mono_item<'tcx>(
                     let impl_self_ty = tcx.subst_and_normalize_erasing_regions(
                         instance.substs,
                         ty::ParamEnv::reveal_all(),
-                        tcx.type_of(impl_def_id),
+                        tcx.bound_type_of(impl_def_id).skip_binder(),
                     );
                     if let Some(def_id) = characteristic_def_id_of_type(impl_self_ty) {
                         return Some(def_id);

compiler/rustc_passes/src/check_attr.rs

@@ -2174,7 +2174,7 @@ impl CheckAttrVisitor<'_> {
         let tcx = self.tcx;
         if target == Target::Fn {
             let Some(tokenstream) = tcx.get_diagnostic_item(sym::TokenStream) else {return};
-            let tokenstream = tcx.type_of(tokenstream);
+            let tokenstream = tcx.bound_type_of(tokenstream).subst_identity();
 
             let id = hir_id.expect_owner();
             let hir_sig = tcx.hir().fn_sig_by_hir_id(hir_id).unwrap();

compiler/rustc_passes/src/dead.rs

@@ -315,7 +315,7 @@ impl<'tcx> MarkSymbolVisitor<'tcx> {
                     //// This is done to handle the case where, for example, the static
                     //// method of a private type is used, but the type itself is never
                     //// called directly.
-                    let self_ty = self.tcx.type_of(item);
+                    let self_ty = self.tcx.bound_type_of(item).subst_identity();
                     match *self_ty.kind() {
                         ty::Adt(def, _) => self.check_def_id(def.did()),
                         ty::Foreign(did) => self.check_def_id(did),
@@ -654,7 +654,7 @@ impl<'tcx> DeadVisitor<'tcx> {
         if self.live_symbols.contains(&field.did.expect_local()) {
             return ShouldWarnAboutField::No;
         }
-        let field_type = self.tcx.type_of(field.did);
+        let field_type = self.tcx.bound_type_of(field.did).subst_identity();
         if field_type.is_phantom_data() {
             return ShouldWarnAboutField::No;
         }

compiler/rustc_passes/src/layout_test.rs

@@ -29,7 +29,7 @@ pub fn test_layout(tcx: TyCtxt<'_>) {
 fn dump_layout_of(tcx: TyCtxt<'_>, item_def_id: LocalDefId, attr: &Attribute) {
     let tcx = tcx;
     let param_env = tcx.param_env(item_def_id);
-    let ty = tcx.type_of(item_def_id);
+    let ty = tcx.bound_type_of(item_def_id).subst_identity();
     match tcx.layout_of(param_env.and(ty)) {
         Ok(ty_layout) => {
             // Check out the `#[rustc_layout(..)]` attribute to tell what to dump.

compiler/rustc_privacy/src/lib.rs

@@ -207,7 +207,7 @@ where
                 // so we need to visit the self type additionally.
                 if let Some(assoc_item) = tcx.opt_associated_item(def_id) {
                     if let Some(impl_def_id) = assoc_item.impl_container(tcx) {
-                        tcx.type_of(impl_def_id).visit_with(self)?;
+                        tcx.bound_type_of(impl_def_id).subst_identity().visit_with(self)?;
                     }
                 }
             }
@@ -341,7 +341,7 @@ trait VisibilityLike: Sized {
         effective_visibilities: &EffectiveVisibilities,
     ) -> Self {
         let mut find = FindMin { tcx, effective_visibilities, min: Self::MAX };
-        find.visit(tcx.type_of(def_id));
+        find.visit(tcx.bound_type_of(def_id).subst_identity());
         if let Some(trait_ref) = tcx.impl_trait_ref(def_id) {
             find.visit_trait(trait_ref.subst_identity());
         }
@@ -837,11 +837,11 @@ impl ReachEverythingInTheInterfaceVisitor<'_, '_> {
                 GenericParamDefKind::Lifetime => {}
                 GenericParamDefKind::Type { has_default, .. } => {
                     if has_default {
-                        self.visit(self.ev.tcx.type_of(param.def_id));
+                        self.visit(self.ev.tcx.bound_type_of(param.def_id).subst_identity());
                     }
                 }
                 GenericParamDefKind::Const { has_default } => {
-                    self.visit(self.ev.tcx.type_of(param.def_id));
+                    self.visit(self.ev.tcx.bound_type_of(param.def_id).subst_identity());
                     if has_default {
                         self.visit(self.ev.tcx.const_param_default(param.def_id).subst_identity());
                     }
@@ -857,7 +857,7 @@ impl ReachEverythingInTheInterfaceVisitor<'_, '_> {
     }
 
     fn ty(&mut self) -> &mut Self {
-        self.visit(self.ev.tcx.type_of(self.item_def_id));
+        self.visit(self.ev.tcx.bound_type_of(self.item_def_id).subst_identity());
         self
     }
 
@@ -1268,7 +1268,7 @@ impl<'tcx> Visitor<'tcx> for TypePrivacyVisitor<'tcx> {
                 // Method calls have to be checked specially.
                 self.span = segment.ident.span;
                 if let Some(def_id) = self.typeck_results().type_dependent_def_id(expr.hir_id) {
-                    if self.visit(self.tcx.type_of(def_id)).is_break() {
+                    if self.visit(self.tcx.bound_type_of(def_id).subst_identity()).is_break() {
                         return;
                     }
                 } else {
@@ -1742,12 +1742,12 @@ impl SearchInterfaceForPrivateItemsVisitor<'_> {
                 GenericParamDefKind::Lifetime => {}
                 GenericParamDefKind::Type { has_default, .. } => {
                     if has_default {
-                        self.visit(self.tcx.type_of(param.def_id));
+                        self.visit(self.tcx.bound_type_of(param.def_id).subst_identity());
                     }
                 }
                 // FIXME(generic_const_exprs): May want to look inside const here
                 GenericParamDefKind::Const { .. } => {
-                    self.visit(self.tcx.type_of(param.def_id));
+                    self.visit(self.tcx.bound_type_of(param.def_id).subst_identity());
                 }
             }
         }
@@ -1774,7 +1774,7 @@ impl SearchInterfaceForPrivateItemsVisitor<'_> {
     }
 
     fn ty(&mut self) -> &mut Self {
-        self.visit(self.tcx.type_of(self.item_def_id));
+        self.visit(self.tcx.bound_type_of(self.item_def_id).subst_identity());
         self
     }
 

compiler/rustc_symbol_mangling/src/legacy.rs

@@ -26,7 +26,7 @@ pub(super) fn mangle<'tcx>(
         let key = tcx.def_key(ty_def_id);
         match key.disambiguated_data.data {
             DefPathData::TypeNs(_) | DefPathData::ValueNs(_) => {
-                instance_ty = tcx.type_of(ty_def_id);
+                instance_ty = tcx.bound_type_of(ty_def_id).subst_identity();
                 debug!(?instance_ty);
                 break;
             }

compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs

@@ -696,7 +696,7 @@ fn transform_ty<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>, options: TransformTyOptio
                 let variant = adt_def.non_enum_variant();
                 let param_env = tcx.param_env(variant.def_id);
                 let field = variant.fields.iter().find(|field| {
-                    let ty = tcx.type_of(field.did);
+                    let ty = tcx.bound_type_of(field.did).subst_identity();
                     let is_zst =
                         tcx.layout_of(param_env.and(ty)).map_or(false, |layout| layout.is_zst());
                     !is_zst

compiler/rustc_trait_selection/src/traits/coherence.rs

@@ -82,8 +82,8 @@ pub fn overlapping_impls(
         (Some(a), Some(b)) => iter::zip(a.skip_binder().substs, b.skip_binder().substs)
             .all(|(arg1, arg2)| drcx.generic_args_may_unify(arg1, arg2)),
         (None, None) => {
-            let self_ty1 = tcx.type_of(impl1_def_id);
+            let self_ty1 = tcx.bound_type_of(impl1_def_id).skip_binder();
-            let self_ty2 = tcx.type_of(impl2_def_id);
+            let self_ty2 = tcx.bound_type_of(impl2_def_id).skip_binder();
             drcx.types_may_unify(self_ty1, self_ty2)
         }
         _ => bug!("unexpected impls: {impl1_def_id:?} {impl2_def_id:?}"),

compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs

@@ -2432,7 +2432,7 @@ impl<'tcx> InferCtxtPrivExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
                             };
                             let mut suggestions = vec![(
                                 path.span.shrink_to_lo(),
-                                format!("<{} as ", self.tcx.type_of(impl_def_id))
+                                format!("<{} as ", self.tcx.bound_type_of(impl_def_id).subst_identity())
                             )];
                             if let Some(generic_arg) = trait_path_segment.args {
                                 let between_span = trait_path_segment.ident.span.between(generic_arg.span_ext);

compiler/rustc_trait_selection/src/traits/error_reporting/on_unimplemented.rs

@@ -200,7 +200,10 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
             if let Some(def) = self_ty.ty_adt_def() {
                 // We also want to be able to select self's original
                 // signature with no type arguments resolved
-                flags.push((sym::_Self, Some(self.tcx.type_of(def.did()).to_string())));
+                flags.push((
+                    sym::_Self,
+                    Some(self.tcx.bound_type_of(def.did()).subst_identity().to_string()),
+                ));
             }
 
             for param in generics.params.iter() {
@@ -218,7 +221,10 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
                     if let Some(def) = param_ty.ty_adt_def() {
                         // We also want to be able to select the parameter's
                         // original signature with no type arguments resolved
-                        flags.push((name, Some(self.tcx.type_of(def.did()).to_string())));
+                        flags.push((
+                            name,
+                            Some(self.tcx.bound_type_of(def.did()).subst_identity().to_string()),
+                        ));
                     }
                 }
             }
@@ -251,7 +257,10 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
                 if let Some(def) = aty.ty_adt_def() {
                     // We also want to be able to select the slice's type's original
                     // signature with no type arguments resolved
-                    flags.push((sym::_Self, Some(format!("[{}]", self.tcx.type_of(def.did())))));
+                    flags.push((
+                        sym::_Self,
+                        Some(format!("[{}]", self.tcx.bound_type_of(def.did()).subst_identity())),
+                    ));
                 }
                 if aty.is_integral() {
                     flags.push((sym::_Self, Some("[{integral}]".to_string())));
@@ -269,7 +278,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
                 if let Some(def) = aty.ty_adt_def() {
                     // We also want to be able to select the array's type's original
                     // signature with no type arguments resolved
-                    let def_ty = self.tcx.type_of(def.did());
+                    let def_ty = self.tcx.bound_type_of(def.did()).subst_identity();
                     flags.push((sym::_Self, Some(format!("[{def_ty}; _]"))));
                     if let Some(n) = len {
                         flags.push((sym::_Self, Some(format!("[{def_ty}; {n}]"))));

compiler/rustc_trait_selection/src/traits/select/confirmation.rs

@@ -557,7 +557,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
                                         ty::INNERMOST,
                                         ty::BoundVar::from_usize(bound_vars.len() - 1),
                                     ),
-                                    tcx.type_of(param.def_id),
+                                    tcx.bound_type_of(param.def_id).subst_identity(),
                                 )
                                 .into()
                             }

compiler/rustc_trait_selection/src/traits/specialize/mod.rs

@@ -455,7 +455,13 @@ pub(crate) fn to_pretty_impl_header(tcx: TyCtxt<'_>, impl_def_id: DefId) -> Opti
         w.push('>');
     }
 
-    write!(w, " {} for {}", trait_ref.print_only_trait_path(), tcx.type_of(impl_def_id)).unwrap();
+    write!(
+        w,
+        " {} for {}",
+        trait_ref.print_only_trait_path(),
+        tcx.bound_type_of(impl_def_id).subst_identity()
+    )
+    .unwrap();
 
     // The predicates will contain default bounds like `T: Sized`. We need to
     // remove these bounds, and add `T: ?Sized` to any untouched type parameters.

compiler/rustc_traits/src/chalk/db.rs

@@ -246,7 +246,7 @@ impl<'tcx> chalk_solve::RustIrDatabase<RustInterner<'tcx>> for RustIrDatabase<'t
 
         // Grab the ADT and the param we might need to calculate its layout
         let param_env = tcx.param_env(did);
-        let adt_ty = tcx.type_of(did);
+        let adt_ty = tcx.bound_type_of(did).subst_identity();
 
         // The ADT is a 1-zst if it's a ZST and its alignment is 1.
         // Mark the ADT as _not_ a 1-zst if there was a layout error.
@@ -738,7 +738,7 @@ fn bound_vars_for_item(tcx: TyCtxt<'_>, def_id: DefId) -> SubstsRef<'_> {
         ty::GenericParamDefKind::Const { .. } => tcx
             .mk_const(
                 ty::ConstKind::Bound(ty::INNERMOST, ty::BoundVar::from(param.index)),
-                tcx.type_of(param.def_id),
+                tcx.bound_type_of(param.def_id).subst_identity(),
             )
             .into(),
     })

compiler/rustc_traits/src/dropck_outlives.rs

@@ -308,7 +308,7 @@ pub(crate) fn adt_dtorck_constraint(
 
     let mut result = DropckConstraint::empty();
     for field in def.all_fields() {
-        let fty = tcx.type_of(field.did);
+        let fty = tcx.bound_type_of(field.did).subst_identity();
         dtorck_constraint_for_ty(tcx, span, fty, 0, fty, &mut result)?;
     }
     result.outlives.extend(tcx.destructor_constraints(def));

compiler/rustc_ty_utils/src/implied_bounds.rs

@@ -28,7 +28,7 @@ fn assumed_wf_types(tcx: TyCtxt<'_>, def_id: DefId) -> &ty::List<Ty<'_>> {
                     tcx.intern_type_list(&types)
                 }
                 // Only the impl self type
-                None => tcx.intern_type_list(&[tcx.type_of(def_id)]),
+                None => tcx.intern_type_list(&[tcx.bound_type_of(def_id).subst_identity()]),
             }
         }
         DefKind::AssocConst | DefKind::AssocTy => tcx.assumed_wf_types(tcx.parent(def_id)),

compiler/rustc_ty_utils/src/instance.rs

@@ -52,8 +52,9 @@ fn inner_resolve_instance<'tcx>(
             tcx.normalize_erasing_regions(param_env, substs),
         )
     } else {
-        let ty = tcx.type_of(def.def_id_for_type_of());
+        let ty = tcx.bound_type_of(def.def_id_for_type_of());
-        let item_type = tcx.subst_and_normalize_erasing_regions(substs, param_env, ty);
+        let item_type =
+            tcx.subst_and_normalize_erasing_regions(substs, param_env, ty.skip_binder());
 
         let def = match *item_type.kind() {
             ty::FnDef(def_id, ..) if tcx.is_intrinsic(def_id) => {

compiler/rustc_ty_utils/src/layout.rs

@@ -453,9 +453,10 @@ fn layout_of_uncached<'tcx>(
                         let param_env = tcx.param_env(def.did());
                         def.is_struct()
                             && match def.variants().iter().next().and_then(|x| x.fields.last()) {
-                                Some(last_field) => {
+                                Some(last_field) => tcx
-                                    tcx.type_of(last_field.did).is_sized(tcx, param_env)
+                                    .bound_type_of(last_field.did)
-                                }
+                                    .subst_identity()
+                                    .is_sized(tcx, param_env),
                                 None => false,
                             }
                     },

compiler/rustc_ty_utils/src/needs_drop.rs

@@ -295,9 +295,15 @@ fn adt_drop_tys<'tcx>(
     let adt_has_dtor =
         |adt_def: ty::AdtDef<'tcx>| adt_def.destructor(tcx).map(|_| DtorType::Significant);
     // `tcx.type_of(def_id)` identical to `tcx.make_adt(def, identity_substs)`
-    drop_tys_helper(tcx, tcx.type_of(def_id), tcx.param_env(def_id), adt_has_dtor, false)
+    drop_tys_helper(
-        .collect::<Result<Vec<_>, _>>()
+        tcx,
-        .map(|components| tcx.intern_type_list(&components))
+        tcx.bound_type_of(def_id).subst_identity(),
+        tcx.param_env(def_id),
+        adt_has_dtor,
+        false,
+    )
+    .collect::<Result<Vec<_>, _>>()
+    .map(|components| tcx.intern_type_list(&components))
 }
 // If `def_id` refers to a generic ADT, the queries above and below act as if they had been handed
 // a `tcx.make_ty(def, identity_substs)` and as such it is legal to substitute the generic parameters
@@ -308,7 +314,7 @@ fn adt_significant_drop_tys(
 ) -> Result<&ty::List<Ty<'_>>, AlwaysRequiresDrop> {
     drop_tys_helper(
         tcx,
-        tcx.type_of(def_id), // identical to `tcx.make_adt(def, identity_substs)`
+        tcx.bound_type_of(def_id).subst_identity(), // identical to `tcx.make_adt(def, identity_substs)`
         tcx.param_env(def_id),
         adt_consider_insignificant_dtor(tcx),
         true,

compiler/rustc_ty_utils/src/representability.rs

@@ -31,7 +31,7 @@ fn representability(tcx: TyCtxt<'_>, def_id: LocalDefId) -> Representability {
             }
             Representability::Representable
         }
-        DefKind::Field => representability_ty(tcx, tcx.type_of(def_id)),
+        DefKind::Field => representability_ty(tcx, tcx.bound_type_of(def_id).subst_identity()),
         def_kind => bug!("unexpected {def_kind:?}"),
     }
 }
@@ -91,7 +91,11 @@ fn params_in_repr(tcx: TyCtxt<'_>, def_id: DefId) -> BitSet<u32> {
     let mut params_in_repr = BitSet::new_empty(generics.params.len());
     for variant in adt_def.variants() {
         for field in variant.fields.iter() {
-            params_in_repr_ty(tcx, tcx.type_of(field.did), &mut params_in_repr);
+            params_in_repr_ty(
+                tcx,
+                tcx.bound_type_of(field.did).subst_identity(),
+                &mut params_in_repr,
+            );
         }
     }
     params_in_repr

compiler/rustc_ty_utils/src/ty.rs

@@ -99,12 +99,10 @@ fn adt_sized_constraint(tcx: TyCtxt<'_>, def_id: DefId) -> &[Ty<'_>] {
     }
     let def = tcx.adt_def(def_id);
 
-    let result = tcx.mk_type_list(
+    let result =
-        def.variants()
+        tcx.mk_type_list(def.variants().iter().flat_map(|v| v.fields.last()).flat_map(|f| {
-            .iter()
+            sized_constraint_for_ty(tcx, def, tcx.bound_type_of(f.did).subst_identity())
-            .flat_map(|v| v.fields.last())
+        }));
-            .flat_map(|f| sized_constraint_for_ty(tcx, def, tcx.type_of(f.did))),
-    );
 
     debug!("adt_sized_constraint: {:?} => {:?}", def, result);
 
@@ -299,7 +297,7 @@ fn well_formed_types_in_env(tcx: TyCtxt<'_>, def_id: DefId) -> &ty::List<Predica
         // In an inherent impl, we assume that the receiver type and all its
         // constituents are well-formed.
         NodeKind::InherentImpl => {
-            let self_ty = tcx.type_of(def_id);
+            let self_ty = tcx.bound_type_of(def_id).subst_identity();
             inputs.extend(self_ty.walk());
         }
 

src/librustdoc/clean/auto_trait.rs

@@ -137,7 +137,7 @@ where
     pub(crate) fn get_auto_trait_impls(&mut self, item_def_id: DefId) -> Vec<Item> {
         let tcx = self.cx.tcx;
         let param_env = tcx.param_env(item_def_id);
-        let ty = tcx.type_of(item_def_id);
+        let ty = tcx.bound_type_of(item_def_id).subst_identity();
         let f = auto_trait::AutoTraitFinder::new(tcx);
 
         debug!("get_auto_trait_impls({:?})", ty);

src/librustdoc/clean/inline.rs

@@ -303,7 +303,11 @@ fn build_union(cx: &mut DocContext<'_>, did: DefId) -> clean::Union {
 
 fn build_type_alias(cx: &mut DocContext<'_>, did: DefId) -> Box<clean::Typedef> {
     let predicates = cx.tcx.explicit_predicates_of(did);
-    let type_ = clean_middle_ty(ty::Binder::dummy(cx.tcx.type_of(did)), cx, Some(did));
+    let type_ = clean_middle_ty(
+        ty::Binder::dummy(cx.tcx.bound_type_of(did).subst_identity()),
+        cx,
+        Some(did),
+    );
 
     Box::new(clean::Typedef {
         type_,
@@ -414,7 +418,11 @@ pub(crate) fn build_impl(
 
     let for_ = match &impl_item {
         Some(impl_) => clean_ty(impl_.self_ty, cx),
-        None => clean_middle_ty(ty::Binder::dummy(tcx.type_of(did)), cx, Some(did)),
+        None => clean_middle_ty(
+            ty::Binder::dummy(tcx.bound_type_of(did).subst_identity()),
+            cx,
+            Some(did),
+        ),
     };
 
     // Only inline impl if the implementing type is
@@ -652,14 +660,22 @@ pub(crate) fn print_inlined_const(tcx: TyCtxt<'_>, did: DefId) -> String {
 
 fn build_const(cx: &mut DocContext<'_>, def_id: DefId) -> clean::Constant {
     clean::Constant {
-        type_: clean_middle_ty(ty::Binder::dummy(cx.tcx.type_of(def_id)), cx, Some(def_id)),
+        type_: clean_middle_ty(
+            ty::Binder::dummy(cx.tcx.bound_type_of(def_id).subst_identity()),
+            cx,
+            Some(def_id),
+        ),
         kind: clean::ConstantKind::Extern { def_id },
     }
 }
 
 fn build_static(cx: &mut DocContext<'_>, did: DefId, mutable: bool) -> clean::Static {
     clean::Static {
-        type_: clean_middle_ty(ty::Binder::dummy(cx.tcx.type_of(did)), cx, Some(did)),
+        type_: clean_middle_ty(
+            ty::Binder::dummy(cx.tcx.bound_type_of(did).subst_identity()),
+            cx,
+            Some(did),
+        ),
         mutability: if mutable { Mutability::Mut } else { Mutability::Not },
         expr: None,
     }

src/librustdoc/clean/mod.rs

@@ -217,7 +217,11 @@ fn clean_lifetime<'tcx>(lifetime: &hir::Lifetime, cx: &mut DocContext<'tcx>) ->
 pub(crate) fn clean_const<'tcx>(constant: &hir::ConstArg, cx: &mut DocContext<'tcx>) -> Constant {
     let def_id = cx.tcx.hir().body_owner_def_id(constant.value.body).to_def_id();
     Constant {
-        type_: clean_middle_ty(ty::Binder::dummy(cx.tcx.type_of(def_id)), cx, Some(def_id)),
+        type_: clean_middle_ty(
+            ty::Binder::dummy(cx.tcx.bound_type_of(def_id).subst_identity()),
+            cx,
+            Some(def_id),
+        ),
         kind: ConstantKind::Anonymous { body: constant.value.body },
     }
 }
@@ -482,7 +486,7 @@ fn clean_generic_param_def<'tcx>(
         ty::GenericParamDefKind::Type { has_default, synthetic, .. } => {
             let default = if has_default {
                 Some(clean_middle_ty(
-                    ty::Binder::dummy(cx.tcx.type_of(def.def_id)),
+                    ty::Binder::dummy(cx.tcx.bound_type_of(def.def_id).subst_identity()),
                     cx,
                     Some(def.def_id),
                 ))
@@ -504,7 +508,7 @@ fn clean_generic_param_def<'tcx>(
             GenericParamDefKind::Const {
                 did: def.def_id,
                 ty: Box::new(clean_middle_ty(
-                    ty::Binder::dummy(cx.tcx.type_of(def.def_id)),
+                    ty::Binder::dummy(cx.tcx.bound_type_of(def.def_id).subst_identity()),
                     cx,
                     Some(def.def_id),
                 )),
@@ -1214,7 +1218,7 @@ pub(crate) fn clean_middle_assoc_item<'tcx>(
     let kind = match assoc_item.kind {
         ty::AssocKind::Const => {
             let ty = clean_middle_ty(
-                ty::Binder::dummy(tcx.type_of(assoc_item.def_id)),
+                ty::Binder::dummy(tcx.bound_type_of(assoc_item.def_id).subst_identity()),
                 cx,
                 Some(assoc_item.def_id),
             );
@@ -1253,7 +1257,9 @@ pub(crate) fn clean_middle_assoc_item<'tcx>(
 
             if assoc_item.fn_has_self_parameter {
                 let self_ty = match assoc_item.container {
-                    ty::ImplContainer => tcx.type_of(assoc_item.container_id(tcx)),
+                    ty::ImplContainer => {
+                        tcx.bound_type_of(assoc_item.container_id(tcx)).subst_identity()
+                    }
                     ty::TraitContainer => tcx.types.self_param,
                 };
                 let self_arg_ty = sig.input(0).skip_binder();
@@ -1400,7 +1406,9 @@ pub(crate) fn clean_middle_assoc_item<'tcx>(
                     AssocTypeItem(
                         Box::new(Typedef {
                             type_: clean_middle_ty(
-                                ty::Binder::dummy(tcx.type_of(assoc_item.def_id)),
+                                ty::Binder::dummy(
+                                    tcx.bound_type_of(assoc_item.def_id).subst_identity(),
+                                ),
                                 cx,
                                 Some(assoc_item.def_id),
                             ),
@@ -1418,7 +1426,9 @@ pub(crate) fn clean_middle_assoc_item<'tcx>(
                 AssocTypeItem(
                     Box::new(Typedef {
                         type_: clean_middle_ty(
-                            ty::Binder::dummy(tcx.type_of(assoc_item.def_id)),
+                            ty::Binder::dummy(
+                                tcx.bound_type_of(assoc_item.def_id).subst_identity(),
+                            ),
                             cx,
                             Some(assoc_item.def_id),
                         ),
@@ -1928,7 +1938,11 @@ pub(crate) fn clean_middle_field<'tcx>(field: &ty::FieldDef, cx: &mut DocContext
     clean_field_with_def_id(
         field.did,
         field.name,
-        clean_middle_ty(ty::Binder::dummy(cx.tcx.type_of(field.did)), cx, Some(field.did)),
+        clean_middle_ty(
+            ty::Binder::dummy(cx.tcx.bound_type_of(field.did).subst_identity()),
+            cx,
+            Some(field.did),
+        ),
         cx,
     )
 }
@@ -2375,9 +2389,11 @@ fn clean_impl<'tcx>(
 
     let for_ = clean_ty(impl_.self_ty, cx);
     let type_alias = for_.def_id(&cx.cache).and_then(|did| match tcx.def_kind(did) {
-        DefKind::TyAlias => {
+        DefKind::TyAlias => Some(clean_middle_ty(
-            Some(clean_middle_ty(ty::Binder::dummy(tcx.type_of(did)), cx, Some(did)))
+            ty::Binder::dummy(tcx.bound_type_of(did).subst_identity()),
-        }
+            cx,
+            Some(did),
+        )),
         _ => None,
     });
     let mut make_item = |trait_: Option<Path>, for_: Type, items: Vec<Item>| {

src/librustdoc/clean/utils.rs

@@ -266,7 +266,7 @@ pub(crate) fn print_evaluated_const(
     underscores_and_type: bool,
 ) -> Option<String> {
     tcx.const_eval_poly(def_id).ok().and_then(|val| {
-        let ty = tcx.type_of(def_id);
+        let ty = tcx.bound_type_of(def_id).subst_identity();
         match (val, ty.kind()) {
             (_, &ty::Ref(..)) => None,
             (ConstValue::Scalar(_), &ty::Adt(_, _)) => None,

src/librustdoc/formats/cache.rs

@@ -453,7 +453,7 @@ impl<'a, 'tcx> DocFolder for CacheBuilder<'a, 'tcx> {
                 | clean::BorrowedRef { type_: box clean::Type::Path { ref path }, .. } => {
                     dids.insert(path.def_id());
                     if let Some(generics) = path.generics() &&
-                        let ty::Adt(adt, _) = self.tcx.type_of(path.def_id()).kind() &&
+                        let ty::Adt(adt, _) = self.tcx.bound_type_of(path.def_id()).subst_identity().kind() &&
                         adt.is_fundamental() {
                         for ty in generics {
                             if let Some(did) = ty.def_id(self.cache) {

src/librustdoc/html/render/print_item.rs

@@ -1855,7 +1855,7 @@ fn document_type_layout(w: &mut Buffer, cx: &Context<'_>, ty_def_id: DefId) {
 
     let tcx = cx.tcx();
     let param_env = tcx.param_env(ty_def_id);
-    let ty = tcx.type_of(ty_def_id);
+    let ty = tcx.bound_type_of(ty_def_id).subst_identity();
     match tcx.layout_of(param_env.and(ty)) {
         Ok(ty_layout) => {
             writeln!(

src/librustdoc/passes/collect_intra_doc_links.rs

@@ -293,7 +293,7 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
         let ty_res = self.resolve_path(&path, TypeNS, item_id, module_id).ok_or_else(no_res)?;
 
         match ty_res {
-            Res::Def(DefKind::Enum, did) => match tcx.type_of(did).kind() {
+            Res::Def(DefKind::Enum, did) => match tcx.bound_type_of(did).subst_identity().kind() {
                 ty::Adt(def, _) if def.is_enum() => {
                     if let Some(variant) = def.variants().iter().find(|v| v.name == variant_name)
                         && let Some(field) = variant.fields.iter().find(|f| f.name == variant_field_name) {
@@ -471,7 +471,7 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
     /// This is used for resolving type aliases.
     fn def_id_to_res(&self, ty_id: DefId) -> Option<Res> {
         use PrimitiveType::*;
-        Some(match *self.cx.tcx.type_of(ty_id).kind() {
+        Some(match *self.cx.tcx.bound_type_of(ty_id).subst_identity().kind() {
             ty::Bool => Res::Primitive(Bool),
             ty::Char => Res::Primitive(Char),
             ty::Int(ity) => Res::Primitive(ity.into()),
@@ -572,7 +572,7 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
                 debug!("looking for associated item named {} for item {:?}", item_name, did);
                 // Checks if item_name is a variant of the `SomeItem` enum
                 if ns == TypeNS && def_kind == DefKind::Enum {
-                    match tcx.type_of(did).kind() {
+                    match tcx.bound_type_of(did).subst_identity().kind() {
                         ty::Adt(adt_def, _) => {
                             for variant in adt_def.variants() {
                                 if variant.name == item_name {
@@ -606,7 +606,7 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
                     // something like [`ambi_fn`](<SomeStruct as SomeTrait>::ambi_fn)
                     .or_else(|| {
                         resolve_associated_trait_item(
-                            tcx.type_of(did),
+                            tcx.bound_type_of(did).subst_identity(),
                             module_id,
                             item_name,
                             ns,
@@ -639,7 +639,7 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
                 // they also look like associated items (`module::Type::Variant`),
                 // because they are real Rust syntax (unlike the intra-doc links
                 // field syntax) and are handled by the compiler's resolver.
-                let def = match tcx.type_of(did).kind() {
+                let def = match tcx.bound_type_of(did).subst_identity().kind() {
                     ty::Adt(def, _) if !def.is_enum() => def,
                     _ => return None,
                 };

src/librustdoc/passes/collect_trait_impls.rs

@@ -109,7 +109,7 @@ pub(crate) fn collect_trait_impls(mut krate: Crate, cx: &mut DocContext<'_>) ->
                     // `Generics`. To avoid relying on the `impl` block, these
                     // things would need to be created from wholecloth, in a
                     // form that is valid for use in type inference.
-                    let ty = tcx.type_of(def_id);
+                    let ty = tcx.bound_type_of(def_id).subst_identity();
                     match ty.kind() {
                         ty::Slice(ty)
                         | ty::Ref(_, ty, _)

src/librustdoc/scrape_examples.rs

@@ -169,7 +169,7 @@ where
                 };
 
                 let ident_span = path.ident.span;
-                (tcx.type_of(def_id), call_span, ident_span)
+                (tcx.bound_type_of(def_id).subst_identity(), call_span, ident_span)
             }
             _ => {
                 return;

src/tools/clippy/clippy_lints/src/casts/cast_ptr_alignment.rs

@@ -66,7 +66,7 @@ fn is_used_as_unaligned(cx: &LateContext<'_>, e: &Expr<'_>) -> bool {
             if matches!(name.ident.as_str(), "read_unaligned" | "write_unaligned")
                 && let Some(def_id) = cx.typeck_results().type_dependent_def_id(parent.hir_id)
                 && let Some(def_id) = cx.tcx.impl_of_method(def_id)
-                && cx.tcx.type_of(def_id).is_unsafe_ptr()
+                && cx.tcx.bound_type_of(def_id).subst_identity().is_unsafe_ptr()
             {
                 true
             } else {

src/tools/clippy/clippy_lints/src/copy_iterator.rs

@@ -43,7 +43,7 @@ impl<'tcx> LateLintPass<'tcx> for CopyIterator {
                 of_trait: Some(ref trait_ref),
                 ..
             }) = item.kind;
-            let ty = cx.tcx.type_of(item.owner_id);
+            let ty = cx.tcx.bound_type_of(item.owner_id).subst_identity();
             if is_copy(cx, ty);
             if let Some(trait_id) = trait_ref.trait_def_id();
             if cx.tcx.is_diagnostic_item(sym::Iterator, trait_id);

src/tools/clippy/clippy_lints/src/default.rs

@@ -150,7 +150,7 @@ impl<'tcx> LateLintPass<'tcx> for Default {
                     .fields
                     .iter()
                     .all(|field| {
-                        is_copy(cx, cx.tcx.type_of(field.did))
+                        is_copy(cx, cx.tcx.bound_type_of(field.did).subst_identity())
                     });
                 if !has_drop(cx, binding_type) || all_fields_are_copy;
                 then {

src/tools/clippy/clippy_lints/src/default_numeric_fallback.rs

@@ -167,7 +167,7 @@ impl<'a, 'tcx> Visitor<'tcx> for NumericFallbackVisitor<'a, 'tcx> {
                                     .iter()
                                     .find_map(|f_def| {
                                         if f_def.ident(self.cx.tcx) == field.ident
-                                            { Some(self.cx.tcx.type_of(f_def.did)) }
+                                            { Some(self.cx.tcx.bound_type_of(f_def.did).subst_identity()) }
                                         else { None }
                                     });
                             self.ty_bounds.push(bound.into());

src/tools/clippy/clippy_lints/src/dereference.rs

@@ -735,7 +735,7 @@ fn walk_parents<'tcx>(
                 span,
                 ..
             }) if span.ctxt() == ctxt => {
-                let ty = cx.tcx.type_of(owner_id.def_id);
+                let ty = cx.tcx.bound_type_of(owner_id.def_id).subst_identity();
                 Some(ty_auto_deref_stability(cx, ty, precedence).position_for_result(cx))
             },
 
@@ -771,7 +771,7 @@ fn walk_parents<'tcx>(
                 }) => variant_of_res(cx, cx.qpath_res(path, *hir_id))
                     .and_then(|variant| variant.fields.iter().find(|f| f.name == field.ident.name))
                     .map(|field_def| {
-                        ty_auto_deref_stability(cx, cx.tcx.type_of(field_def.did), precedence).position_for_arg()
+                        ty_auto_deref_stability(cx, cx.tcx.bound_type_of(field_def.did).subst_identity(), precedence).position_for_arg()
                     }),
                 _ => None,
             },

src/tools/clippy/clippy_lints/src/derivable_impls.rs

@@ -184,7 +184,7 @@ impl<'tcx> LateLintPass<'tcx> for DerivableImpls {
             if let Some(Node::ImplItem(impl_item)) = cx.tcx.hir().find(impl_item_hir);
             if let ImplItemKind::Fn(_, b) = &impl_item.kind;
             if let Body { value: func_expr, .. } = cx.tcx.hir().body(*b);
-            if let Some(adt_def) = cx.tcx.type_of(item.owner_id).ty_adt_def();
+            if let Some(adt_def) = cx.tcx.bound_type_of(item.owner_id).subst_identity().ty_adt_def();
             if let attrs = cx.tcx.hir().attrs(item.hir_id());
             if !attrs.iter().any(|attr| attr.doc_str().is_some());
             if let child_attrs = cx.tcx.hir().attrs(impl_item_hir);