Effects cleanup

- removed extra bits from predicates queries that are no longer needed in the new system
- removed the need for `non_erasable_generics` to take in tcx and DefId, removed unused arguments in callers

compiler/rustc_codegen_cranelift/src/debuginfo/mod.rs

@@ -210,7 +210,6 @@ impl DebugContext {
         type_names::push_generic_params(
             tcx,
             tcx.normalize_erasing_regions(ty::ParamEnv::reveal_all(), args),
-            enclosing_fn_def_id,
             &mut name,
         );
 

compiler/rustc_codegen_gcc/src/callee.rs

@@ -98,8 +98,7 @@ pub fn get_fn<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, instance: Instance<'tcx>)
         // whether we are sharing generics or not. The important thing here is
         // that the visibility we apply to the declaration is the same one that
         // has been applied to the definition (wherever that definition may be).
-        let is_generic =
-            instance.args.non_erasable_generics(tcx, instance.def_id()).next().is_some();
+        let is_generic = instance.args.non_erasable_generics().next().is_some();
 
         if is_generic {
             // This is a monomorphization. Its expected visibility depends

compiler/rustc_codegen_llvm/src/callee.rs

@@ -98,8 +98,7 @@ pub(crate) fn get_fn<'ll, 'tcx>(cx: &CodegenCx<'ll, 'tcx>, instance: Instance<'t
         unsafe {
             llvm::LLVMRustSetLinkage(llfn, llvm::Linkage::ExternalLinkage);
 
-            let is_generic =
-                instance.args.non_erasable_generics(tcx, instance.def_id()).next().is_some();
+            let is_generic = instance.args.non_erasable_generics().next().is_some();
 
             let is_hidden = if is_generic {
                 // This is a monomorphization of a generic function.

compiler/rustc_codegen_llvm/src/debuginfo/mod.rs

@@ -350,7 +350,6 @@ impl<'ll, 'tcx> DebugInfoCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
         type_names::push_generic_params(
             tcx,
             tcx.normalize_erasing_regions(ty::ParamEnv::reveal_all(), args),
-            enclosing_fn_def_id,
             &mut name,
         );
 

compiler/rustc_codegen_ssa/src/back/symbol_export.rs

@@ -312,7 +312,7 @@ fn exported_symbols_provider_local(
 
             match *mono_item {
                 MonoItem::Fn(Instance { def: InstanceKind::Item(def), args }) => {
-                    if args.non_erasable_generics(tcx, def).next().is_some() {
+                    if args.non_erasable_generics().next().is_some() {
                         let symbol = ExportedSymbol::Generic(def, args);
                         symbols.push((symbol, SymbolExportInfo {
                             level: SymbolExportLevel::Rust,
@@ -321,12 +321,9 @@ fn exported_symbols_provider_local(
                         }));
                     }
                 }
-                MonoItem::Fn(Instance { def: InstanceKind::DropGlue(def_id, Some(ty)), args }) => {
+                MonoItem::Fn(Instance { def: InstanceKind::DropGlue(_, Some(ty)), args }) => {
                     // A little sanity-check
-                    assert_eq!(
-                        args.non_erasable_generics(tcx, def_id).next(),
-                        Some(GenericArgKind::Type(ty))
-                    );
+                    assert_eq!(args.non_erasable_generics().next(), Some(GenericArgKind::Type(ty)));
                     symbols.push((ExportedSymbol::DropGlue(ty), SymbolExportInfo {
                         level: SymbolExportLevel::Rust,
                         kind: SymbolExportKind::Text,
@@ -334,14 +331,11 @@ fn exported_symbols_provider_local(
                     }));
                 }
                 MonoItem::Fn(Instance {
-                    def: InstanceKind::AsyncDropGlueCtorShim(def_id, Some(ty)),
+                    def: InstanceKind::AsyncDropGlueCtorShim(_, Some(ty)),
                     args,
                 }) => {
                     // A little sanity-check
-                    assert_eq!(
-                        args.non_erasable_generics(tcx, def_id).next(),
-                        Some(GenericArgKind::Type(ty))
-                    );
+                    assert_eq!(args.non_erasable_generics().next(), Some(GenericArgKind::Type(ty)));
                     symbols.push((ExportedSymbol::AsyncDropGlueCtorShim(ty), SymbolExportInfo {
                         level: SymbolExportLevel::Rust,
                         kind: SymbolExportKind::Text,

compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs

@@ -110,14 +110,14 @@ fn push_debuginfo_type_name<'tcx>(
                     ty_and_layout,
                     &|output, visited| {
                         push_item_name(tcx, def.did(), true, output);
-                        push_generic_params_internal(tcx, args, def.did(), output, visited);
+                        push_generic_params_internal(tcx, args, output, visited);
                     },
                     output,
                     visited,
                 );
             } else {
                 push_item_name(tcx, def.did(), qualified, output);
-                push_generic_params_internal(tcx, args, def.did(), output, visited);
+                push_generic_params_internal(tcx, args, output, visited);
             }
         }
         ty::Tuple(component_types) => {
@@ -251,13 +251,8 @@ fn push_debuginfo_type_name<'tcx>(
                 let principal =
                     tcx.normalize_erasing_late_bound_regions(ty::ParamEnv::reveal_all(), principal);
                 push_item_name(tcx, principal.def_id, qualified, output);
-                let principal_has_generic_params = push_generic_params_internal(
-                    tcx,
-                    principal.args,
-                    principal.def_id,
-                    output,
-                    visited,
-                );
+                let principal_has_generic_params =
+                    push_generic_params_internal(tcx, principal.args, output, visited);
 
                 let projection_bounds: SmallVec<[_; 4]> = trait_data
                     .projection_bounds()
@@ -538,13 +533,7 @@ pub fn compute_debuginfo_vtable_name<'tcx>(
             tcx.normalize_erasing_late_bound_regions(ty::ParamEnv::reveal_all(), trait_ref);
         push_item_name(tcx, trait_ref.def_id, true, &mut vtable_name);
         visited.clear();
-        push_generic_params_internal(
-            tcx,
-            trait_ref.args,
-            trait_ref.def_id,
-            &mut vtable_name,
-            &mut visited,
-        );
+        push_generic_params_internal(tcx, trait_ref.args, &mut vtable_name, &mut visited);
     } else {
         vtable_name.push('_');
     }
@@ -647,12 +636,11 @@ fn push_unqualified_item_name(
 fn push_generic_params_internal<'tcx>(
     tcx: TyCtxt<'tcx>,
     args: GenericArgsRef<'tcx>,
-    def_id: DefId,
     output: &mut String,
     visited: &mut FxHashSet<Ty<'tcx>>,
 ) -> bool {
     assert_eq!(args, tcx.normalize_erasing_regions(ty::ParamEnv::reveal_all(), args));
-    let mut args = args.non_erasable_generics(tcx, def_id).peekable();
+    let mut args = args.non_erasable_generics().peekable();
     if args.peek().is_none() {
         return false;
     }
@@ -736,12 +724,11 @@ fn push_const_param<'tcx>(tcx: TyCtxt<'tcx>, ct: ty::Const<'tcx>, output: &mut S
 pub fn push_generic_params<'tcx>(
     tcx: TyCtxt<'tcx>,
     args: GenericArgsRef<'tcx>,
-    def_id: DefId,
     output: &mut String,
 ) {
     let _prof = tcx.prof.generic_activity("compute_debuginfo_type_name");
     let mut visited = FxHashSet::default();
-    push_generic_params_internal(tcx, args, def_id, output, &mut visited);
+    push_generic_params_internal(tcx, args, output, &mut visited);
 }
 
 fn push_closure_or_coroutine_name<'tcx>(
@@ -786,7 +773,7 @@ fn push_closure_or_coroutine_name<'tcx>(
     // FIXME(async_closures): This is probably not going to be correct w.r.t.
     // multiple coroutine flavors. Maybe truncate to (parent + 1)?
     let args = args.truncate_to(tcx, generics);
-    push_generic_params_internal(tcx, args, enclosing_fn_def_id, output, visited);
+    push_generic_params_internal(tcx, args, output, visited);
 }
 
 fn push_close_angle_bracket(cpp_like_debuginfo: bool, output: &mut String) {

compiler/rustc_hir_analysis/src/bounds.rs

@@ -1,7 +1,6 @@
 //! Bounds are restrictions applied to some types after they've been lowered from the HIR to the
 //! [`rustc_middle::ty`] form.
 
-use rustc_data_structures::fx::FxIndexMap;
 use rustc_hir::LangItem;
 use rustc_middle::ty::{self, Ty, TyCtxt, Upcast};
 use rustc_span::Span;
@@ -25,7 +24,6 @@ use rustc_span::Span;
 #[derive(Default, PartialEq, Eq, Clone, Debug)]
 pub(crate) struct Bounds<'tcx> {
     clauses: Vec<(ty::Clause<'tcx>, Span)>,
-    effects_min_tys: FxIndexMap<Ty<'tcx>, Span>,
 }
 
 impl<'tcx> Bounds<'tcx> {
@@ -96,15 +94,7 @@ impl<'tcx> Bounds<'tcx> {
         }
     }
 
-    pub(crate) fn clauses(
-        &self,
-        // FIXME(effects): remove tcx
-        _tcx: TyCtxt<'tcx>,
-    ) -> impl Iterator<Item = (ty::Clause<'tcx>, Span)> + '_ {
+    pub(crate) fn clauses(&self) -> impl Iterator<Item = (ty::Clause<'tcx>, Span)> + '_ {
         self.clauses.iter().cloned()
     }
-
-    pub(crate) fn effects_min_tys(&self) -> impl Iterator<Item = Ty<'tcx>> + '_ {
-        self.effects_min_tys.keys().copied()
-    }
 }

compiler/rustc_hir_analysis/src/collect/item_bounds.rs

@@ -67,7 +67,7 @@ fn associated_type_bounds<'tcx>(
             )
         });
 
-    let all_bounds = tcx.arena.alloc_from_iter(bounds.clauses(tcx).chain(bounds_from_parent));
+    let all_bounds = tcx.arena.alloc_from_iter(bounds.clauses().chain(bounds_from_parent));
     debug!(
         "associated_type_bounds({}) = {:?}",
         tcx.def_path_str(assoc_item_def_id.to_def_id()),
@@ -339,7 +339,7 @@ fn opaque_type_bounds<'tcx>(
         }
         debug!(?bounds);
 
-        tcx.arena.alloc_from_iter(bounds.clauses(tcx))
+        tcx.arena.alloc_from_iter(bounds.clauses())
     })
 }
 

compiler/rustc_hir_analysis/src/collect/predicates_of.rs

@@ -106,7 +106,6 @@ fn gather_explicit_predicates_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::Gen
             return ty::GenericPredicates {
                 parent: Some(tcx.parent(def_id.to_def_id())),
                 predicates: tcx.arena.alloc_from_iter(predicates),
-                effects_min_tys: ty::List::empty(),
             };
         }
 
@@ -128,7 +127,6 @@ fn gather_explicit_predicates_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::Gen
             return ty::GenericPredicates {
                 parent: Some(impl_def_id),
                 predicates: tcx.arena.alloc_from_iter(impl_predicates),
-                effects_min_tys: ty::List::empty(),
             };
         }
 
@@ -154,7 +152,6 @@ fn gather_explicit_predicates_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::Gen
     // We use an `IndexSet` to preserve order of insertion.
     // Preserving the order of insertion is important here so as not to break UI tests.
     let mut predicates: FxIndexSet<(ty::Clause<'_>, Span)> = FxIndexSet::default();
-    let mut effects_min_tys = Vec::new();
 
     let hir_generics = node.generics().unwrap_or(NO_GENERICS);
     if let Node::Item(item) = node {
@@ -189,8 +186,7 @@ fn gather_explicit_predicates_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::Gen
             ty::List::empty(),
             PredicateFilter::All,
         );
-        predicates.extend(bounds.clauses(tcx));
-        effects_min_tys.extend(bounds.effects_min_tys());
+        predicates.extend(bounds.clauses());
     }
 
     // In default impls, we can assume that the self type implements
@@ -223,7 +219,7 @@ fn gather_explicit_predicates_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::Gen
                     param.span,
                 );
                 trace!(?bounds);
-                predicates.extend(bounds.clauses(tcx));
+                predicates.extend(bounds.clauses());
                 trace!(?predicates);
             }
             hir::GenericParamKind::Const { .. } => {
@@ -275,8 +271,7 @@ fn gather_explicit_predicates_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::Gen
                     bound_vars,
                     PredicateFilter::All,
                 );
-                predicates.extend(bounds.clauses(tcx));
-                effects_min_tys.extend(bounds.effects_min_tys());
+                predicates.extend(bounds.clauses());
             }
 
             hir::WherePredicate::RegionPredicate(region_pred) => {
@@ -348,7 +343,6 @@ fn gather_explicit_predicates_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::Gen
     ty::GenericPredicates {
         parent: generics.parent,
         predicates: tcx.arena.alloc_from_iter(predicates),
-        effects_min_tys: tcx.mk_type_list(&effects_min_tys),
     }
 }
 
@@ -499,7 +493,6 @@ pub(super) fn explicit_predicates_of<'tcx>(
             ty::GenericPredicates {
                 parent: predicates_and_bounds.parent,
                 predicates: tcx.arena.alloc_slice(&predicates),
-                effects_min_tys: predicates_and_bounds.effects_min_tys,
             }
         }
     } else {
@@ -551,7 +544,6 @@ pub(super) fn explicit_predicates_of<'tcx>(
             return GenericPredicates {
                 parent: parent_preds.parent,
                 predicates: { tcx.arena.alloc_from_iter(filtered_predicates) },
-                effects_min_tys: parent_preds.effects_min_tys,
             };
         }
         gather_explicit_predicates_of(tcx, def_id)
@@ -630,7 +622,7 @@ pub(super) fn implied_predicates_with_filter<'tcx>(
 
     // Combine the two lists to form the complete set of superbounds:
     let implied_bounds =
-        &*tcx.arena.alloc_from_iter(bounds.clauses(tcx).chain(where_bounds_that_match));
+        &*tcx.arena.alloc_from_iter(bounds.clauses().chain(where_bounds_that_match));
     debug!(?implied_bounds);
 
     // Now require that immediate supertraits are lowered, which will, in
@@ -874,7 +866,7 @@ impl<'tcx> ItemCtxt<'tcx> {
             );
         }
 
-        bounds.clauses(self.tcx).collect()
+        bounds.clauses().collect()
     }
 }
 
@@ -966,7 +958,7 @@ pub(super) fn const_conditions<'tcx>(
 
     ty::ConstConditions {
         parent: has_parent.then(|| tcx.local_parent(def_id).to_def_id()),
-        predicates: tcx.arena.alloc_from_iter(bounds.clauses(tcx).map(|(clause, span)| {
+        predicates: tcx.arena.alloc_from_iter(bounds.clauses().map(|(clause, span)| {
             (
                 clause.kind().map_bound(|clause| match clause {
                     ty::ClauseKind::HostEffect(ty::HostEffectPredicate {

compiler/rustc_hir_analysis/src/delegation.rs

@@ -278,8 +278,6 @@ impl<'tcx> PredicatesBuilder<'tcx> {
         ty::GenericPredicates {
             parent: self.parent,
             predicates: self.tcx.arena.alloc_from_iter(preds),
-            // FIXME(fn_delegation): Support effects.
-            effects_min_tys: ty::List::empty(),
         }
     }
 }

compiler/rustc_hir_analysis/src/hir_ty_lowering/dyn_compatibility.rs

@@ -62,7 +62,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
 
         let mut trait_bounds = vec![];
         let mut projection_bounds = vec![];
-        for (pred, span) in bounds.clauses(tcx) {
+        for (pred, span) in bounds.clauses() {
             let bound_pred = pred.kind();
             match bound_pred.skip_binder() {
                 ty::ClauseKind::Trait(trait_pred) => {

compiler/rustc_middle/src/mir/mono.rs

@@ -86,11 +86,9 @@ impl<'tcx> MonoItem<'tcx> {
         }
     }
 
-    pub fn is_generic_fn(&self, tcx: TyCtxt<'tcx>) -> bool {
+    pub fn is_generic_fn(&self) -> bool {
         match self {
-            MonoItem::Fn(instance) => {
-                instance.args.non_erasable_generics(tcx, instance.def_id()).next().is_some()
-            }
+            MonoItem::Fn(instance) => instance.args.non_erasable_generics().next().is_some(),
             MonoItem::Static(..) | MonoItem::GlobalAsm(..) => false,
         }
     }

compiler/rustc_middle/src/ty/diagnostics.rs

@@ -70,7 +70,7 @@ impl<'tcx> Ty<'tcx> {
     /// ADTs with no type arguments.
     pub fn is_simple_text(self, tcx: TyCtxt<'tcx>) -> bool {
         match self.kind() {
-            Adt(def, args) => args.non_erasable_generics(tcx, def.did()).next().is_none(),
+            Adt(_, args) => args.non_erasable_generics().next().is_none(),
             Ref(_, ty, _) => ty.is_simple_text(tcx),
             _ => self.is_simple_ty(),
         }

compiler/rustc_middle/src/ty/generic_args.rs

@@ -501,9 +501,6 @@ impl<'tcx> GenericArgs<'tcx> {
     #[inline]
     pub fn non_erasable_generics(
         &'tcx self,
-        // FIXME(effects): Remove these
-        _tcx: TyCtxt<'tcx>,
-        _def_id: DefId,
     ) -> impl DoubleEndedIterator<Item = GenericArgKind<'tcx>> + 'tcx {
         self.iter().filter_map(|k| match k.unpack() {
             ty::GenericArgKind::Lifetime(_) => None,

compiler/rustc_middle/src/ty/generics.rs

@@ -360,7 +360,6 @@ impl<'tcx> Generics {
 pub struct GenericPredicates<'tcx> {
     pub parent: Option<DefId>,
     pub predicates: &'tcx [(Clause<'tcx>, Span)],
-    pub effects_min_tys: &'tcx ty::List<Ty<'tcx>>,
 }
 
 impl<'tcx> GenericPredicates<'tcx> {

compiler/rustc_middle/src/ty/instance.rs

@@ -204,7 +204,7 @@ impl<'tcx> Instance<'tcx> {
         }
 
         // If this a non-generic instance, it cannot be a shared monomorphization.
-        self.args.non_erasable_generics(tcx, self.def_id()).next()?;
+        self.args.non_erasable_generics().next()?;
 
         // compiler_builtins cannot use upstream monomorphizations.
         if tcx.is_compiler_builtins(LOCAL_CRATE) {

compiler/rustc_mir_transform/src/inline.rs

@@ -439,12 +439,7 @@ impl<'tcx> Inliner<'tcx> {
 
         // Reachability pass defines which functions are eligible for inlining. Generally inlining
         // other functions is incorrect because they could reference symbols that aren't exported.
-        let is_generic = callsite
-            .callee
-            .args
-            .non_erasable_generics(self.tcx, callsite.callee.def_id())
-            .next()
-            .is_some();
+        let is_generic = callsite.callee.args.non_erasable_generics().next().is_some();
         if !is_generic && !cross_crate_inlinable {
             return Err("not exported");
         }

compiler/rustc_monomorphize/src/collector.rs

@@ -505,7 +505,7 @@ fn collect_items_rec<'tcx>(
     // Check for PMEs and emit a diagnostic if one happened. To try to show relevant edges of the
     // mono item graph.
     if tcx.dcx().err_count() > error_count
-        && starting_item.node.is_generic_fn(tcx)
+        && starting_item.node.is_generic_fn()
         && starting_item.node.is_user_defined()
     {
         let formatted_item = with_no_trimmed_paths!(starting_item.node.to_string());

compiler/rustc_monomorphize/src/partitioning.rs

@@ -229,7 +229,7 @@ where
         }
 
         let characteristic_def_id = characteristic_def_id_of_mono_item(cx.tcx, mono_item);
-        let is_volatile = is_incremental_build && mono_item.is_generic_fn(cx.tcx);
+        let is_volatile = is_incremental_build && mono_item.is_generic_fn();
 
         let cgu_name = match characteristic_def_id {
             Some(def_id) => compute_codegen_unit_name(
@@ -822,7 +822,7 @@ fn mono_item_visibility<'tcx>(
         return Visibility::Hidden;
     }
 
-    let is_generic = instance.args.non_erasable_generics(tcx, def_id).next().is_some();
+    let is_generic = instance.args.non_erasable_generics().next().is_some();
 
     // Upstream `DefId` instances get different handling than local ones.
     let Some(def_id) = def_id.as_local() else {

compiler/rustc_smir/src/rustc_smir/context.rs

@@ -161,8 +161,7 @@ impl<'tcx> Context for TablesWrapper<'tcx> {
     fn predicates_of(&self, def_id: stable_mir::DefId) -> stable_mir::ty::GenericPredicates {
         let mut tables = self.0.borrow_mut();
         let def_id = tables[def_id];
-        let GenericPredicates { parent, predicates, effects_min_tys: _ } =
-            tables.tcx.predicates_of(def_id);
+        let GenericPredicates { parent, predicates } = tables.tcx.predicates_of(def_id);
         stable_mir::ty::GenericPredicates {
             parent: parent.map(|did| tables.trait_def(did)),
             predicates: predicates
@@ -183,8 +182,7 @@ impl<'tcx> Context for TablesWrapper<'tcx> {
     ) -> stable_mir::ty::GenericPredicates {
         let mut tables = self.0.borrow_mut();
         let def_id = tables[def_id];
-        let GenericPredicates { parent, predicates, effects_min_tys: _ } =
-            tables.tcx.explicit_predicates_of(def_id);
+        let GenericPredicates { parent, predicates } = tables.tcx.explicit_predicates_of(def_id);
         stable_mir::ty::GenericPredicates {
             parent: parent.map(|did| tables.trait_def(did)),
             predicates: predicates

compiler/rustc_symbol_mangling/src/lib.rs

@@ -135,7 +135,7 @@ fn symbol_name_provider<'tcx>(tcx: TyCtxt<'tcx>, instance: Instance<'tcx>) -> ty
         // This closure determines the instantiating crate for instances that
         // need an instantiating-crate-suffix for their symbol name, in order
         // to differentiate between local copies.
-        if is_generic(instance, tcx) {
+        if is_generic(instance) {
             // For generics we might find re-usable upstream instances. If there
             // is one, we rely on the symbol being instantiated locally.
             instance.upstream_monomorphization(tcx).unwrap_or(LOCAL_CRATE)
@@ -241,7 +241,7 @@ fn compute_symbol_name<'tcx>(
     // the ID of the instantiating crate. This avoids symbol conflicts
     // in case the same instances is emitted in two crates of the same
     // project.
-    let avoid_cross_crate_conflicts = is_generic(instance, tcx) || is_globally_shared_function;
+    let avoid_cross_crate_conflicts = is_generic(instance) || is_globally_shared_function;
 
     let instantiating_crate = avoid_cross_crate_conflicts.then(compute_instantiating_crate);
 
@@ -276,6 +276,6 @@ fn compute_symbol_name<'tcx>(
     symbol
 }
 
-fn is_generic<'tcx>(instance: Instance<'tcx>, tcx: TyCtxt<'tcx>) -> bool {
-    instance.args.non_erasable_generics(tcx, instance.def_id()).next().is_some()
+fn is_generic<'tcx>(instance: Instance<'tcx>) -> bool {
+    instance.args.non_erasable_generics().next().is_some()
 }

src/librustdoc/clean/mod.rs

@@ -1400,7 +1400,6 @@ pub(crate) fn clean_middle_assoc_item(assoc_item: &ty::AssocItem, cx: &mut DocCo
                 clean_ty_generics(cx, tcx.generics_of(assoc_item.def_id), ty::GenericPredicates {
                     parent: None,
                     predicates,
-                    effects_min_tys: ty::List::empty(),
                 });
             simplify::move_bounds_to_generic_parameters(&mut generics);
 

src/tools/clippy/clippy_lints/src/derive.rs

@@ -324,7 +324,7 @@ fn check_copy_clone<'tcx>(cx: &LateContext<'tcx>, item: &Item<'_>, trait_ref: &h
     // If the current self type doesn't implement Copy (due to generic constraints), search to see if
     // there's a Copy impl for any instance of the adt.
     if !is_copy(cx, ty) {
-        if ty_subs.non_erasable_generics(cx.tcx, ty_adt.did()).next().is_some() {
+        if ty_subs.non_erasable_generics().next().is_some() {
             let has_copy_impl = cx.tcx.all_local_trait_impls(()).get(&copy_id).map_or(false, |impls| {
                 impls.iter().any(|&id| {
                     matches!(cx.tcx.type_of(id).instantiate_identity().kind(), ty::Adt(adt, _)