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authorBoxy <supbscripter@gmail.com>2024-06-03 01:10:24 +0100
committerBoxy <supbscripter@gmail.com>2024-06-05 22:25:38 +0100
commit58feec9b85a18d26507dfe6d075fd128a1265888 (patch)
tree16af5f24e34f389b1eae6c2e0e6205aca115674c
parent7ebd2bdbf6d798e6e711a0100981b0ff029abf5f (diff)
downloadrust-58feec9b85a18d26507dfe6d075fd128a1265888.tar.gz
rust-58feec9b85a18d26507dfe6d075fd128a1265888.zip
Basic removal of `Ty` from places (boring)
-rw-r--r--compiler/rustc_borrowck/src/type_check/relate_tys.rs4
-rw-r--r--compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs3
-rw-r--r--compiler/rustc_hir_analysis/src/check/compare_impl_item.rs3
-rw-r--r--compiler/rustc_hir_analysis/src/collect.rs12
-rw-r--r--compiler/rustc_hir_analysis/src/collect/predicates_of.rs2
-rw-r--r--compiler/rustc_hir_analysis/src/hir_ty_lowering/bounds.rs6
-rw-r--r--compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs47
-rw-r--r--compiler/rustc_hir_analysis/src/hir_ty_lowering/object_safety.rs3
-rw-r--r--compiler/rustc_hir_typeck/src/demand.rs2
-rw-r--r--compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs14
-rw-r--r--compiler/rustc_hir_typeck/src/fn_ctxt/mod.rs9
-rw-r--r--compiler/rustc_hir_typeck/src/method/confirm.rs11
-rw-r--r--compiler/rustc_hir_typeck/src/method/suggest.rs4
-rw-r--r--compiler/rustc_hir_typeck/src/writeback.rs2
-rw-r--r--compiler/rustc_infer/src/infer/canonical/canonicalizer.rs27
-rw-r--r--compiler/rustc_infer/src/infer/canonical/instantiate.rs2
-rw-r--r--compiler/rustc_infer/src/infer/canonical/mod.rs11
-rw-r--r--compiler/rustc_infer/src/infer/error_reporting/need_type_info.rs4
-rw-r--r--compiler/rustc_infer/src/infer/freshen.rs7
-rw-r--r--compiler/rustc_infer/src/infer/mod.rs53
-rw-r--r--compiler/rustc_infer/src/infer/relate/generalize.rs8
-rw-r--r--compiler/rustc_infer/src/infer/relate/higher_ranked.rs3
-rw-r--r--compiler/rustc_infer/src/infer/snapshot/fudge.rs2
-rw-r--r--compiler/rustc_middle/src/mir/consts.rs28
-rw-r--r--compiler/rustc_middle/src/ty/abstract_const.rs2
-rw-r--r--compiler/rustc_middle/src/ty/codec.rs4
-rw-r--r--compiler/rustc_middle/src/ty/consts.rs144
-rw-r--r--compiler/rustc_middle/src/ty/context.rs51
-rw-r--r--compiler/rustc_middle/src/ty/flags.rs5
-rw-r--r--compiler/rustc_middle/src/ty/fold.rs20
-rw-r--r--compiler/rustc_middle/src/ty/generic_args.rs6
-rw-r--r--compiler/rustc_middle/src/ty/generics.rs12
-rw-r--r--compiler/rustc_middle/src/ty/layout.rs4
-rw-r--r--compiler/rustc_middle/src/ty/mod.rs4
-rw-r--r--compiler/rustc_middle/src/ty/opaque_types.rs2
-rw-r--r--compiler/rustc_middle/src/ty/print/pretty.rs4
-rw-r--r--compiler/rustc_middle/src/ty/relate.rs13
-rw-r--r--compiler/rustc_middle/src/ty/structural_impls.rs19
-rw-r--r--compiler/rustc_middle/src/ty/walk.rs25
-rw-r--r--compiler/rustc_mir_build/src/build/expr/as_constant.rs6
-rw-r--r--compiler/rustc_next_trait_solver/src/canonicalizer.rs50
-rw-r--r--compiler/rustc_next_trait_solver/src/resolve.rs7
-rw-r--r--compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/encode.rs11
-rw-r--r--compiler/rustc_smir/src/rustc_smir/convert/ty.rs5
-rw-r--r--compiler/rustc_symbol_mangling/src/legacy.rs11
-rw-r--r--compiler/rustc_symbol_mangling/src/v0.rs16
-rw-r--r--compiler/rustc_trait_selection/src/solve/eval_ctxt/canonical.rs2
-rw-r--r--compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs14
-rw-r--r--compiler/rustc_trait_selection/src/solve/inspect/analyse.rs2
-rw-r--r--compiler/rustc_trait_selection/src/solve/mod.rs5
-rw-r--r--compiler/rustc_trait_selection/src/solve/normalize.rs9
-rw-r--r--compiler/rustc_trait_selection/src/solve/normalizes_to/anon_const.rs4
-rw-r--r--compiler/rustc_trait_selection/src/solve/normalizes_to/mod.rs9
-rw-r--r--compiler/rustc_trait_selection/src/traits/auto_trait.rs3
-rw-r--r--compiler/rustc_trait_selection/src/traits/coherence.rs1
-rw-r--r--compiler/rustc_trait_selection/src/traits/const_evaluatable.rs4
-rw-r--r--compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs3
-rw-r--r--compiler/rustc_trait_selection/src/traits/fulfill.rs4
-rw-r--r--compiler/rustc_trait_selection/src/traits/mod.rs2
-rw-r--r--compiler/rustc_trait_selection/src/traits/project.rs20
-rw-r--r--compiler/rustc_trait_selection/src/traits/select/confirmation.rs3
-rw-r--r--compiler/rustc_trait_selection/src/traits/select/mod.rs5
-rw-r--r--compiler/rustc_trait_selection/src/traits/util.rs4
-rw-r--r--compiler/rustc_transmute/src/lib.rs3
-rw-r--r--compiler/rustc_ty_utils/src/consts.rs41
-rw-r--r--compiler/rustc_type_ir/src/canonical.rs55
-rw-r--r--compiler/rustc_type_ir/src/debug.rs4
-rw-r--r--compiler/rustc_type_ir/src/fold.rs2
-rw-r--r--compiler/rustc_type_ir/src/infcx.rs7
-rw-r--r--compiler/rustc_type_ir/src/inherent.rs17
-rw-r--r--compiler/rustc_type_ir/src/predicate.rs1
71 files changed, 331 insertions, 581 deletions
diff --git a/compiler/rustc_borrowck/src/type_check/relate_tys.rs b/compiler/rustc_borrowck/src/type_check/relate_tys.rs
index cbd8a4125cd..9863c4a3883 100644
--- a/compiler/rustc_borrowck/src/type_check/relate_tys.rs
+++ b/compiler/rustc_borrowck/src/type_check/relate_tys.rs
@@ -193,7 +193,7 @@ impl<'me, 'bccx, 'tcx> NllTypeRelating<'me, 'bccx, 'tcx> {
                 types: &mut |_bound_ty: ty::BoundTy| {
                     unreachable!("we only replace regions in nll_relate, not types")
                 },
-                consts: &mut |_bound_var: ty::BoundVar, _ty| {
+                consts: &mut |_bound_var: ty::BoundVar| {
                     unreachable!("we only replace regions in nll_relate, not consts")
                 },
             };
@@ -231,7 +231,7 @@ impl<'me, 'bccx, 'tcx> NllTypeRelating<'me, 'bccx, 'tcx> {
             types: &mut |_bound_ty: ty::BoundTy| {
                 unreachable!("we only replace regions in nll_relate, not types")
             },
-            consts: &mut |_bound_var: ty::BoundVar, _ty| {
+            consts: &mut |_bound_var: ty::BoundVar| {
                 unreachable!("we only replace regions in nll_relate, not consts")
             },
         };
diff --git a/compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs b/compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs
index 2360cce55a9..2783ffc49a8 100644
--- a/compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs
+++ b/compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs
@@ -693,7 +693,8 @@ fn push_const_param<'tcx>(tcx: TyCtxt<'tcx>, ct: ty::Const<'tcx>, output: &mut S
         ty::ConstKind::Param(param) => {
             write!(output, "{}", param.name)
         }
-        _ => match ct.ty().kind() {
+        // THISPR
+        _ => match { todo!() as Ty<'tcx> }.kind() {
             ty::Int(ity) => {
                 let bits = ct.eval_bits(tcx, ty::ParamEnv::reveal_all());
                 let val = Integer::from_int_ty(&tcx, *ity).size().sign_extend(bits) as i128;
diff --git a/compiler/rustc_hir_analysis/src/check/compare_impl_item.rs b/compiler/rustc_hir_analysis/src/check/compare_impl_item.rs
index 74dcd672578..82b57cdd106 100644
--- a/compiler/rustc_hir_analysis/src/check/compare_impl_item.rs
+++ b/compiler/rustc_hir_analysis/src/check/compare_impl_item.rs
@@ -2198,9 +2198,6 @@ fn param_env_with_gat_bounds<'tcx>(
                         tcx,
                         ty::INNERMOST,
                         ty::BoundVar::from_usize(bound_vars.len() - 1),
-                        tcx.type_of(param.def_id)
-                            .no_bound_vars()
-                            .expect("const parameter types cannot be generic"),
                     )
                     .into()
                 }
diff --git a/compiler/rustc_hir_analysis/src/collect.rs b/compiler/rustc_hir_analysis/src/collect.rs
index d84dcb78ad2..092d2d304c3 100644
--- a/compiler/rustc_hir_analysis/src/collect.rs
+++ b/compiler/rustc_hir_analysis/src/collect.rs
@@ -396,16 +396,8 @@ impl<'tcx> HirTyLowerer<'tcx> for ItemCtxt<'tcx> {
         Ty::new_error_with_message(self.tcx(), span, "bad placeholder type")
     }
 
-    fn ct_infer(&self, ty: Ty<'tcx>, _: Option<&ty::GenericParamDef>, span: Span) -> Const<'tcx> {
-        let ty = self.tcx.fold_regions(ty, |r, _| match *r {
-            rustc_type_ir::RegionKind::ReStatic => r,
-
-            // This is never reached in practice. If it ever is reached,
-            // `ReErased` should be changed to `ReStatic`, and any other region
-            // left alone.
-            r => bug!("unexpected region: {r:?}"),
-        });
-        ty::Const::new_error_with_message(self.tcx(), ty, span, "bad placeholder constant")
+    fn ct_infer(&self, _: Option<&ty::GenericParamDef>, span: Span) -> Const<'tcx> {
+        ty::Const::new_error_with_message(self.tcx(), span, "bad placeholder constant")
     }
 
     fn probe_ty_param_bounds(
diff --git a/compiler/rustc_hir_analysis/src/collect/predicates_of.rs b/compiler/rustc_hir_analysis/src/collect/predicates_of.rs
index 913fae6b5b6..40204961e9c 100644
--- a/compiler/rustc_hir_analysis/src/collect/predicates_of.rs
+++ b/compiler/rustc_hir_analysis/src/collect/predicates_of.rs
@@ -196,7 +196,7 @@ fn gather_explicit_predicates_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::Gen
                     .type_of(param.def_id.to_def_id())
                     .no_bound_vars()
                     .expect("const parameters cannot be generic");
-                let ct = icx.lowerer().lower_const_param(param.hir_id, ct_ty);
+                let ct = icx.lowerer().lower_const_param(param.hir_id);
                 predicates
                     .insert((ty::ClauseKind::ConstArgHasType(ct, ct_ty).upcast(tcx), param.span));
             }
diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/bounds.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/bounds.rs
index 73ce577907e..7f6f57907c2 100644
--- a/compiler/rustc_hir_analysis/src/hir_ty_lowering/bounds.rs
+++ b/compiler/rustc_hir_analysis/src/hir_ty_lowering/bounds.rs
@@ -368,11 +368,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
                                     },
                                 )
                             });
-                            let ty = tcx
-                                .type_of(param.def_id)
-                                .no_bound_vars()
-                                .expect("ct params cannot have early bound vars");
-                            ty::Const::new_error(tcx, guar, ty).into()
+                            ty::Const::new_error(tcx, guar).into()
                         }
                     };
                     num_bound_vars += 1;
diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs
index 9b8edbc10ad..0dee904c5a2 100644
--- a/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs
+++ b/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs
@@ -111,12 +111,7 @@ pub trait HirTyLowerer<'tcx> {
     fn ty_infer(&self, param: Option<&ty::GenericParamDef>, span: Span) -> Ty<'tcx>;
 
     /// Returns the const to use when a const is omitted.
-    fn ct_infer(
-        &self,
-        ty: Ty<'tcx>,
-        param: Option<&ty::GenericParamDef>,
-        span: Span,
-    ) -> Const<'tcx>;
+    fn ct_infer(&self, param: Option<&ty::GenericParamDef>, span: Span) -> Const<'tcx>;
 
     /// Probe bounds in scope where the bounded type coincides with the given type parameter.
     ///
@@ -439,7 +434,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
 
             fn provided_kind(
                 &mut self,
-                preceding_args: &[ty::GenericArg<'tcx>],
+                _preceding_args: &[ty::GenericArg<'tcx>],
                 param: &ty::GenericParamDef,
                 arg: &GenericArg<'tcx>,
             ) -> ty::GenericArg<'tcx> {
@@ -447,7 +442,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
 
                 if let Err(incorrect) = self.incorrect_args {
                     if incorrect.invalid_args.contains(&(param.index as usize)) {
-                        return param.to_error(tcx, preceding_args);
+                        return param.to_error(tcx);
                     }
                 }
 
@@ -487,12 +482,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
                         ty::Const::from_anon_const(tcx, did).into()
                     }
                     (&GenericParamDefKind::Const { .. }, hir::GenericArg::Infer(inf)) => {
-                        let ty = tcx
-                            .at(self.span)
-                            .type_of(param.def_id)
-                            .no_bound_vars()
-                            .expect("const parameter types cannot be generic");
-                        self.lowerer.ct_infer(ty, Some(param), inf.span).into()
+                        self.lowerer.ct_infer(Some(param), inf.span).into()
                     }
                     (kind, arg) => span_bug!(
                         self.span,
@@ -511,7 +501,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
 
                 if let Err(incorrect) = self.incorrect_args {
                     if incorrect.invalid_args.contains(&(param.index as usize)) {
-                        return param.to_error(tcx, preceding_args);
+                        return param.to_error(tcx);
                     }
                 }
                 match param.kind {
@@ -548,7 +538,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
                             .no_bound_vars()
                             .expect("const parameter types cannot be generic");
                         if let Err(guar) = ty.error_reported() {
-                            return ty::Const::new_error(tcx, guar, ty).into();
+                            return ty::Const::new_error(tcx, guar).into();
                         }
                         // FIXME(effects) see if we should special case effect params here
                         if !infer_args && has_default {
@@ -557,10 +547,10 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
                                 .into()
                         } else {
                             if infer_args {
-                                self.lowerer.ct_infer(ty, Some(param), self.span).into()
+                                self.lowerer.ct_infer(Some(param), self.span).into()
                             } else {
                                 // We've already errored above about the mismatch.
-                                ty::Const::new_misc_error(tcx, ty).into()
+                                ty::Const::new_misc_error(tcx).into()
                             }
                         }
                     }
@@ -1908,7 +1898,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
     ///
     /// Early-bound const parameters get lowered to [`ty::ConstKind::Param`]
     /// and late-bound ones to [`ty::ConstKind::Bound`].
-    pub(crate) fn lower_const_param(&self, hir_id: HirId, param_ty: Ty<'tcx>) -> Const<'tcx> {
+    pub(crate) fn lower_const_param(&self, hir_id: HirId) -> Const<'tcx> {
         let tcx = self.tcx();
         match tcx.named_bound_var(hir_id) {
             Some(rbv::ResolvedArg::EarlyBound(def_id)) => {
@@ -1918,12 +1908,12 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
                 let generics = tcx.generics_of(item_def_id);
                 let index = generics.param_def_id_to_index[&def_id];
                 let name = tcx.item_name(def_id);
-                ty::Const::new_param(tcx, ty::ParamConst::new(index, name), param_ty)
+                ty::Const::new_param(tcx, ty::ParamConst::new(index, name))
             }
             Some(rbv::ResolvedArg::LateBound(debruijn, index, _)) => {
-                ty::Const::new_bound(tcx, debruijn, ty::BoundVar::from_u32(index), param_ty)
+                ty::Const::new_bound(tcx, debruijn, ty::BoundVar::from_u32(index))
             }
-            Some(rbv::ResolvedArg::Error(guar)) => ty::Const::new_error(tcx, guar, param_ty),
+            Some(rbv::ResolvedArg::Error(guar)) => ty::Const::new_error(tcx, guar),
             arg => bug!("unexpected bound var resolution for {:?}: {arg:?}", hir_id),
         }
     }
@@ -2139,7 +2129,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
             }
             hir::TyKind::Array(ty, length) => {
                 let length = match length {
-                    hir::ArrayLen::Infer(inf) => self.ct_infer(tcx.types.usize, None, inf.span),
+                    hir::ArrayLen::Infer(inf) => self.ct_infer(None, inf.span),
                     hir::ArrayLen::Body(constant) => {
                         ty::Const::from_anon_const(tcx, constant.def_id)
                     }
@@ -2177,7 +2167,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
                                     match tcx.lit_to_const(lit_input) {
                                         Ok(c) => c,
                                         Err(LitToConstError::Reported(err)) => {
-                                            ty::Const::new_error(tcx, err, ty)
+                                            ty::Const::new_error(tcx, err)
                                         }
                                         Err(LitToConstError::TypeError) => todo!(),
                                     }
@@ -2198,19 +2188,20 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
                                         .type_of(def_id)
                                         .no_bound_vars()
                                         .expect("const parameter types cannot be generic");
-                                    self.lower_const_param(expr.hir_id, ty)
+                                    self.lower_const_param(expr.hir_id)
                                 }
 
                                 _ => {
                                     let err = tcx
                                         .dcx()
                                         .emit_err(crate::errors::NonConstRange { span: expr.span });
-                                    ty::Const::new_error(tcx, err, ty)
+                                    ty::Const::new_error(tcx, err)
                                 }
                             };
-                            self.record_ty(expr.hir_id, c.ty(), expr.span);
+                            // THISPR
+                            self.record_ty(expr.hir_id, todo!(), expr.span);
                             if let Some((id, span)) = neg {
-                                self.record_ty(id, c.ty(), span);
+                                self.record_ty(id, todo!(), span);
                             }
                             c
                         };
diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/object_safety.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/object_safety.rs
index b9c5ae0c65b..ed1749ea14f 100644
--- a/compiler/rustc_hir_analysis/src/hir_ty_lowering/object_safety.rs
+++ b/compiler/rustc_hir_analysis/src/hir_ty_lowering/object_safety.rs
@@ -144,7 +144,8 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
                         let references_self = match pred.skip_binder().term.unpack() {
                             ty::TermKind::Ty(ty) => ty.walk().any(|arg| arg == dummy_self.into()),
                             ty::TermKind::Const(c) => {
-                                c.ty().walk().any(|arg| arg == dummy_self.into())
+                                // THISPR
+                                false
                             }
                         };
 
diff --git a/compiler/rustc_hir_typeck/src/demand.rs b/compiler/rustc_hir_typeck/src/demand.rs
index fa147f9bfcf..5d30b2a71e0 100644
--- a/compiler/rustc_hir_typeck/src/demand.rs
+++ b/compiler/rustc_hir_typeck/src/demand.rs
@@ -350,7 +350,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             lt_op: |_| self.tcx.lifetimes.re_erased,
             ct_op: |ct| {
                 if let ty::ConstKind::Infer(_) = ct.kind() {
-                    self.next_const_var(ct.ty(), DUMMY_SP)
+                    self.next_const_var(DUMMY_SP)
                 } else {
                     ct
                 }
diff --git a/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs b/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
index 084639ad40c..616ce1f5b06 100644
--- a/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
+++ b/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
@@ -436,7 +436,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
     pub fn lower_array_length(&self, length: &hir::ArrayLen<'tcx>) -> ty::Const<'tcx> {
         match length {
-            hir::ArrayLen::Infer(inf) => self.ct_infer(self.tcx.types.usize, None, inf.span),
+            hir::ArrayLen::Infer(inf) => self.ct_infer(None, inf.span),
             hir::ArrayLen::Body(anon_const) => {
                 let span = self.tcx.def_span(anon_const.def_id);
                 let c = ty::Const::from_anon_const(self.tcx, anon_const.def_id);
@@ -1292,20 +1292,10 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                         &GenericParamDefKind::Const { has_default, is_host_effect },
                         GenericArg::Infer(inf),
                     ) => {
-                        let tcx = self.fcx.tcx();
-
                         if has_default && is_host_effect {
                             self.fcx.var_for_effect(param)
                         } else {
-                            self.fcx
-                                .ct_infer(
-                                    tcx.type_of(param.def_id)
-                                        .no_bound_vars()
-                                        .expect("const parameter types cannot be generic"),
-                                    Some(param),
-                                    inf.span,
-                                )
-                                .into()
+                            self.fcx.ct_infer(Some(param), inf.span).into()
                         }
                     }
                     _ => unreachable!(),
diff --git a/compiler/rustc_hir_typeck/src/fn_ctxt/mod.rs b/compiler/rustc_hir_typeck/src/fn_ctxt/mod.rs
index b9ff348c42f..f02b0f95390 100644
--- a/compiler/rustc_hir_typeck/src/fn_ctxt/mod.rs
+++ b/compiler/rustc_hir_typeck/src/fn_ctxt/mod.rs
@@ -237,12 +237,7 @@ impl<'tcx> HirTyLowerer<'tcx> for FnCtxt<'_, 'tcx> {
         }
     }
 
-    fn ct_infer(
-        &self,
-        ty: Ty<'tcx>,
-        param: Option<&ty::GenericParamDef>,
-        span: Span,
-    ) -> Const<'tcx> {
+    fn ct_infer(&self, param: Option<&ty::GenericParamDef>, span: Span) -> Const<'tcx> {
         // FIXME ideally this shouldn't use unwrap
         match param {
             Some(
@@ -252,7 +247,7 @@ impl<'tcx> HirTyLowerer<'tcx> for FnCtxt<'_, 'tcx> {
                 },
             ) => self.var_for_effect(param).as_const().unwrap(),
             Some(param) => self.var_for_def(span, param).as_const().unwrap(),
-            None => self.next_const_var(ty, span),
+            None => self.next_const_var(span),
         }
     }
 
diff --git a/compiler/rustc_hir_typeck/src/method/confirm.rs b/compiler/rustc_hir_typeck/src/method/confirm.rs
index 949b9241005..3c9a49e91a3 100644
--- a/compiler/rustc_hir_typeck/src/method/confirm.rs
+++ b/compiler/rustc_hir_typeck/src/method/confirm.rs
@@ -406,16 +406,7 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> {
                         self.cfcx.ty_infer(Some(param), inf.span).into()
                     }
                     (GenericParamDefKind::Const { .. }, GenericArg::Infer(inf)) => {
-                        let tcx = self.cfcx.tcx();
-                        self.cfcx
-                            .ct_infer(
-                                tcx.type_of(param.def_id)
-                                    .no_bound_vars()
-                                    .expect("const parameter types cannot be generic"),
-                                Some(param),
-                                inf.span,
-                            )
-                            .into()
+                        self.cfcx.ct_infer(Some(param), inf.span).into()
                     }
                     (kind, arg) => {
                         bug!("mismatched method arg kind {kind:?} in turbofish: {arg:?}")
diff --git a/compiler/rustc_hir_typeck/src/method/suggest.rs b/compiler/rustc_hir_typeck/src/method/suggest.rs
index b3947e142b2..c1e14f7fb75 100644
--- a/compiler/rustc_hir_typeck/src/method/suggest.rs
+++ b/compiler/rustc_hir_typeck/src/method/suggest.rs
@@ -2096,9 +2096,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                                 .next_region_var(RegionVariableOrigin::MiscVariable(DUMMY_SP))
                                 .into(),
                             GenericArgKind::Type(_) => self.next_ty_var(DUMMY_SP).into(),
-                            GenericArgKind::Const(arg) => {
-                                self.next_const_var(arg.ty(), DUMMY_SP).into()
-                            }
+                            GenericArgKind::Const(_) => self.next_const_var(DUMMY_SP).into(),
                         }
                     } else {
                         arg
diff --git a/compiler/rustc_hir_typeck/src/writeback.rs b/compiler/rustc_hir_typeck/src/writeback.rs
index e337105f011..8727c0f87dc 100644
--- a/compiler/rustc_hir_typeck/src/writeback.rs
+++ b/compiler/rustc_hir_typeck/src/writeback.rs
@@ -863,7 +863,7 @@ impl<'cx, 'tcx> TypeFolder<TyCtxt<'tcx>> for Resolver<'cx, 'tcx> {
 
     fn fold_const(&mut self, ct: ty::Const<'tcx>) -> ty::Const<'tcx> {
         self.handle_term(ct, ty::Const::outer_exclusive_binder, |tcx, guar| {
-            ty::Const::new_error(tcx, guar, ct.ty())
+            ty::Const::new_error(tcx, guar)
         })
         .super_fold_with(self)
     }
diff --git a/compiler/rustc_infer/src/infer/canonical/canonicalizer.rs b/compiler/rustc_infer/src/infer/canonical/canonicalizer.rs
index 27b06c4b73e..bc2592b43f3 100644
--- a/compiler/rustc_infer/src/infer/canonical/canonicalizer.rs
+++ b/compiler/rustc_infer/src/infer/canonical/canonicalizer.rs
@@ -462,7 +462,7 @@ impl<'cx, 'tcx> TypeFolder<TyCtxt<'tcx>> for Canonicalizer<'cx, 'tcx> {
                 // any equated inference vars correctly!
                 let root_vid = self.infcx.unwrap().root_const_var(vid);
                 if root_vid != vid {
-                    ct = ty::Const::new_var(self.tcx, root_vid, ct.ty());
+                    ct = ty::Const::new_var(self.tcx, root_vid);
                     vid = root_vid;
                 }
 
@@ -481,7 +481,7 @@ impl<'cx, 'tcx> TypeFolder<TyCtxt<'tcx>> for Canonicalizer<'cx, 'tcx> {
                             ui = ty::UniverseIndex::ROOT;
                         }
                         return self.canonicalize_const_var(
-                            CanonicalVarInfo { kind: CanonicalVarKind::Const(ui, ct.ty()) },
+                            CanonicalVarInfo { kind: CanonicalVarKind::Const(ui) },
                             ct,
                         );
                     }
@@ -510,9 +510,7 @@ impl<'cx, 'tcx> TypeFolder<TyCtxt<'tcx>> for Canonicalizer<'cx, 'tcx> {
             }
             ty::ConstKind::Placeholder(placeholder) => {
                 return self.canonicalize_const_var(
-                    CanonicalVarInfo {
-                        kind: CanonicalVarKind::PlaceholderConst(placeholder, ct.ty()),
-                    },
+                    CanonicalVarInfo { kind: CanonicalVarKind::PlaceholderConst(placeholder) },
                     ct,
                 );
             }
@@ -719,9 +717,7 @@ impl<'cx, 'tcx> Canonicalizer<'cx, 'tcx> {
                     CanonicalVarKind::Region(u) => {
                         CanonicalVarKind::Region(reverse_universe_map[&u])
                     }
-                    CanonicalVarKind::Const(u, t) => {
-                        CanonicalVarKind::Const(reverse_universe_map[&u], t)
-                    }
+                    CanonicalVarKind::Const(u) => CanonicalVarKind::Const(reverse_universe_map[&u]),
                     CanonicalVarKind::PlaceholderTy(placeholder) => {
                         CanonicalVarKind::PlaceholderTy(ty::Placeholder {
                             universe: reverse_universe_map[&placeholder.universe],
@@ -734,14 +730,11 @@ impl<'cx, 'tcx> Canonicalizer<'cx, 'tcx> {
                             ..placeholder
                         })
                     }
-                    CanonicalVarKind::PlaceholderConst(placeholder, t) => {
-                        CanonicalVarKind::PlaceholderConst(
-                            ty::Placeholder {
-                                universe: reverse_universe_map[&placeholder.universe],
-                                ..placeholder
-                            },
-                            t,
-                        )
+                    CanonicalVarKind::PlaceholderConst(placeholder) => {
+                        CanonicalVarKind::PlaceholderConst(ty::Placeholder {
+                            universe: reverse_universe_map[&placeholder.universe],
+                            ..placeholder
+                        })
                     }
                 },
             })
@@ -806,6 +799,6 @@ impl<'cx, 'tcx> Canonicalizer<'cx, 'tcx> {
             !self.infcx.is_some_and(|infcx| const_var != infcx.shallow_resolve_const(const_var))
         );
         let var = self.canonical_var(info, const_var.into());
-        ty::Const::new_bound(self.tcx, self.binder_index, var, self.fold_ty(const_var.ty()))
+        ty::Const::new_bound(self.tcx, self.binder_index, var)
     }
 }
diff --git a/compiler/rustc_infer/src/infer/canonical/instantiate.rs b/compiler/rustc_infer/src/infer/canonical/instantiate.rs
index de0e15ef3de..153de3d4c09 100644
--- a/compiler/rustc_infer/src/infer/canonical/instantiate.rs
+++ b/compiler/rustc_infer/src/infer/canonical/instantiate.rs
@@ -70,7 +70,7 @@ where
                 GenericArgKind::Type(ty) => ty,
                 r => bug!("{:?} is a type but value is {:?}", bound_ty, r),
             },
-            consts: &mut |bound_ct: ty::BoundVar, _| match var_values[bound_ct].unpack() {
+            consts: &mut |bound_ct: ty::BoundVar| match var_values[bound_ct].unpack() {
                 GenericArgKind::Const(ct) => ct,
                 c => bug!("{:?} is a const but value is {:?}", bound_ct, c),
             },
diff --git a/compiler/rustc_infer/src/infer/canonical/mod.rs b/compiler/rustc_infer/src/infer/canonical/mod.rs
index 1abb8086d41..8ad4f7926ca 100644
--- a/compiler/rustc_infer/src/infer/canonical/mod.rs
+++ b/compiler/rustc_infer/src/infer/canonical/mod.rs
@@ -143,8 +143,8 @@ impl<'tcx> InferCtxt<'tcx> {
                 ty::Region::new_placeholder(self.tcx, placeholder_mapped).into()
             }
 
-            CanonicalVarKind::Const(ui, ty) => {
-                self.next_const_var_in_universe(ty, span, universe_map(ui)).into()
+            CanonicalVarKind::Const(ui) => {
+                self.next_const_var_in_universe(span, universe_map(ui)).into()
             }
             CanonicalVarKind::Effect => {
                 let vid = self
@@ -153,13 +153,12 @@ impl<'tcx> InferCtxt<'tcx> {
                     .effect_unification_table()
                     .new_key(EffectVarValue::Unknown)
                     .vid;
-                ty::Const::new_infer(self.tcx, ty::InferConst::EffectVar(vid), self.tcx.types.bool)
-                    .into()
+                ty::Const::new_infer(self.tcx, ty::InferConst::EffectVar(vid)).into()
             }
-            CanonicalVarKind::PlaceholderConst(ty::PlaceholderConst { universe, bound }, ty) => {
+            CanonicalVarKind::PlaceholderConst(ty::PlaceholderConst { universe, bound }) => {
                 let universe_mapped = universe_map(universe);
                 let placeholder_mapped = ty::PlaceholderConst { universe: universe_mapped, bound };
-                ty::Const::new_placeholder(self.tcx, placeholder_mapped, ty).into()
+                ty::Const::new_placeholder(self.tcx, placeholder_mapped).into()
             }
         }
     }
diff --git a/compiler/rustc_infer/src/infer/error_reporting/need_type_info.rs b/compiler/rustc_infer/src/infer/error_reporting/need_type_info.rs
index fb8c843f309..cb0e13652e8 100644
--- a/compiler/rustc_infer/src/infer/error_reporting/need_type_info.rs
+++ b/compiler/rustc_infer/src/infer/error_reporting/need_type_info.rs
@@ -543,9 +543,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
                             match arg.unpack() {
                                 GenericArgKind::Lifetime(_) => bug!("unexpected lifetime"),
                                 GenericArgKind::Type(_) => self.next_ty_var(DUMMY_SP).into(),
-                                GenericArgKind::Const(arg) => {
-                                    self.next_const_var(arg.ty(), DUMMY_SP).into()
-                                }
+                                GenericArgKind::Const(_) => self.next_const_var(DUMMY_SP).into(),
                             }
                         }))
                         .unwrap();
diff --git a/compiler/rustc_infer/src/infer/freshen.rs b/compiler/rustc_infer/src/infer/freshen.rs
index a3c8d5f4251..3ef25ae2d3e 100644
--- a/compiler/rustc_infer/src/infer/freshen.rs
+++ b/compiler/rustc_infer/src/infer/freshen.rs
@@ -79,7 +79,6 @@ impl<'a, 'tcx> TypeFreshener<'a, 'tcx> {
         &mut self,
         input: Result<ty::Const<'tcx>, ty::InferConst>,
         freshener: F,
-        ty: Ty<'tcx>,
     ) -> ty::Const<'tcx>
     where
         F: FnOnce(u32) -> ty::InferConst,
@@ -91,7 +90,7 @@ impl<'a, 'tcx> TypeFreshener<'a, 'tcx> {
                 Entry::Vacant(entry) => {
                     let index = self.const_freshen_count;
                     self.const_freshen_count += 1;
-                    let ct = ty::Const::new_infer(self.infcx.tcx, freshener(index), ty);
+                    let ct = ty::Const::new_infer(self.infcx.tcx, freshener(index));
                     entry.insert(ct);
                     ct
                 }
@@ -149,7 +148,7 @@ impl<'a, 'tcx> TypeFolder<TyCtxt<'tcx>> for TypeFreshener<'a, 'tcx> {
                         ty::InferConst::Var(inner.const_unification_table().find(v).vid)
                     });
                 drop(inner);
-                self.freshen_const(input, ty::InferConst::Fresh, ct.ty())
+                self.freshen_const(input, ty::InferConst::Fresh)
             }
             ty::ConstKind::Infer(ty::InferConst::EffectVar(v)) => {
                 let mut inner = self.infcx.inner.borrow_mut();
@@ -158,7 +157,7 @@ impl<'a, 'tcx> TypeFolder<TyCtxt<'tcx>> for TypeFreshener<'a, 'tcx> {
                         ty::InferConst::EffectVar(inner.effect_unification_table().find(v).vid)
                     });
                 drop(inner);
-                self.freshen_const(input, ty::InferConst::Fresh, ct.ty())
+                self.freshen_const(input, ty::InferConst::Fresh)
             }
             ty::ConstKind::Infer(ty::InferConst::Fresh(i)) => {
                 if i >= self.const_freshen_count {
diff --git a/compiler/rustc_infer/src/infer/mod.rs b/compiler/rustc_infer/src/infer/mod.rs
index e9a4cc3e04b..1f6c534fbec 100644
--- a/compiler/rustc_infer/src/infer/mod.rs
+++ b/compiler/rustc_infer/src/infer/mod.rs
@@ -392,18 +392,18 @@ impl<'tcx> ty::InferCtxtLike for InferCtxt<'tcx> {
         self.opportunistic_resolve_float_var(vid)
     }
 
-    fn opportunistic_resolve_ct_var(&self, vid: ConstVid, ty: Ty<'tcx>) -> ty::Const<'tcx> {
+    fn opportunistic_resolve_ct_var(&self, vid: ConstVid) -> ty::Const<'tcx> {
         match self.probe_const_var(vid) {
             Ok(ct) => ct,
-            Err(_) => ty::Const::new_var(self.tcx, self.root_const_var(vid), ty),
+            Err(_) => ty::Const::new_var(self.tcx, self.root_const_var(vid)),
         }
     }
 
-    fn opportunistic_resolve_effect_var(&self, vid: EffectVid, ty: Ty<'tcx>) -> ty::Const<'tcx> {
+    fn opportunistic_resolve_effect_var(&self, vid: EffectVid) -> ty::Const<'tcx> {
         match self.probe_effect_var(vid) {
             Some(ct) => ct,
             None => {
-                ty::Const::new_infer(self.tcx, InferConst::EffectVar(self.root_effect_var(vid)), ty)
+                ty::Const::new_infer(self.tcx, InferConst::EffectVar(self.root_effect_var(vid)))
             }
         }
     }
@@ -832,9 +832,7 @@ impl<'tcx> InferCtxt<'tcx> {
         (0..table.len())
             .map(|i| ty::EffectVid::from_usize(i))
             .filter(|&vid| table.probe_value(vid).is_unknown())
-            .map(|v| {
-                ty::Const::new_infer(self.tcx, ty::InferConst::EffectVar(v), self.tcx.types.bool)
-            })
+            .map(|v| ty::Const::new_infer(self.tcx, ty::InferConst::EffectVar(v)))
             .collect()
     }
 
@@ -993,27 +991,22 @@ impl<'tcx> InferCtxt<'tcx> {
         Ty::new_var(self.tcx, vid)
     }
 
-    pub fn next_const_var(&self, ty: Ty<'tcx>, span: Span) -> ty::Const<'tcx> {
-        self.next_const_var_with_origin(ty, ConstVariableOrigin { span, param_def_id: None })
+    pub fn next_const_var(&self, span: Span) -> ty::Const<'tcx> {
+        self.next_const_var_with_origin(ConstVariableOrigin { span, param_def_id: None })
     }
 
-    pub fn next_const_var_with_origin(
-        &self,
-        ty: Ty<'tcx>,
-        origin: ConstVariableOrigin,
-    ) -> ty::Const<'tcx> {
+    pub fn next_const_var_with_origin(&self, origin: ConstVariableOrigin) -> ty::Const<'tcx> {
         let vid = self
             .inner
             .borrow_mut()
             .const_unification_table()
             .new_key(ConstVariableValue::Unknown { origin, universe: self.universe() })
             .vid;
-        ty::Const::new_var(self.tcx, vid, ty)
+        ty::Const::new_var(self.tcx, vid)
     }
 
     pub fn next_const_var_in_universe(
         &self,
-        ty: Ty<'tcx>,
         span: Span,
         universe: ty::UniverseIndex,
     ) -> ty::Const<'tcx> {
@@ -1024,7 +1017,7 @@ impl<'tcx> InferCtxt<'tcx> {
             .const_unification_table()
             .new_key(ConstVariableValue::Unknown { origin, universe })
             .vid;
-        ty::Const::new_var(self.tcx, vid, ty)
+        ty::Const::new_var(self.tcx, vid)
     }
 
     pub fn next_const_var_id(&self, origin: ConstVariableOrigin) -> ConstVid {
@@ -1135,15 +1128,7 @@ impl<'tcx> InferCtxt<'tcx> {
                     .const_unification_table()
                     .new_key(ConstVariableValue::Unknown { origin, universe: self.universe() })
                     .vid;
-                ty::Const::new_var(
-                    self.tcx,
-                    const_var_id,
-                    self.tcx
-                        .type_of(param.def_id)
-                        .no_bound_vars()
-                        .expect("const parameter types cannot be generic"),
-                )
-                .into()
+                ty::Const::new_var(self.tcx, const_var_id).into()
             }
         }
     }
@@ -1157,7 +1142,7 @@ impl<'tcx> InferCtxt<'tcx> {
             .no_bound_vars()
             .expect("const parameter types cannot be generic");
         debug_assert_eq!(self.tcx.types.bool, ty);
-        ty::Const::new_infer(self.tcx, ty::InferConst::EffectVar(effect_vid), ty).into()
+        ty::Const::new_infer(self.tcx, ty::InferConst::EffectVar(effect_vid)).into()
     }
 
     /// Given a set of generics defined on a type or impl, returns the generic parameters mapping each
@@ -1469,10 +1454,10 @@ impl<'tcx> InferCtxt<'tcx> {
                     .or_insert_with(|| self.infcx.next_ty_var(self.span).into())
                     .expect_ty()
             }
-            fn replace_const(&mut self, bv: ty::BoundVar, ty: Ty<'tcx>) -> ty::Const<'tcx> {
+            fn replace_const(&mut self, bv: ty::BoundVar) -> ty::Const<'tcx> {
                 self.map
                     .entry(bv)
-                    .or_insert_with(|| self.infcx.next_const_var(ty, self.span).into())
+                    .or_insert_with(|| self.infcx.next_const_var(self.span).into())
                     .expect_const()
             }
         }
@@ -1526,11 +1511,11 @@ impl<'tcx> InferCtxt<'tcx> {
         &self,
         param_env: ty::ParamEnv<'tcx>,
         unevaluated: ty::UnevaluatedConst<'tcx>,
-        ty: Ty<'tcx>,
         span: Span,
     ) -> Result<ty::Const<'tcx>, ErrorHandled> {
         match self.const_eval_resolve(param_env, unevaluated, span) {
-            Ok(Some(val)) => Ok(ty::Const::new_value(self.tcx, val, ty)),
+            // THISPR
+            Ok(Some(val)) => Ok(ty::Const::new_value(self.tcx, val, todo!())),
             Ok(None) => {
                 let tcx = self.tcx;
                 let def_id = unevaluated.def;
@@ -1964,11 +1949,6 @@ fn replace_param_and_infer_args_with_placeholder<'tcx>(
 
         fn fold_const(&mut self, c: ty::Const<'tcx>) -> ty::Const<'tcx> {
             if let ty::ConstKind::Infer(_) = c.kind() {
-                let ty = c.ty();
-                // If the type references param or infer then ICE ICE ICE
-                if ty.has_non_region_param() || ty.has_non_region_infer() {
-                    bug!("const `{c}`'s type should not reference params or types");
-                }
                 ty::Const::new_placeholder(
                     self.tcx,
                     ty::PlaceholderConst {
@@ -1979,7 +1959,6 @@ fn replace_param_and_infer_args_with_placeholder<'tcx>(
                             idx
                         }),
                     },
-                    ty,
                 )
             } else {
                 c.super_fold_with(self)
diff --git a/compiler/rustc_infer/src/infer/relate/generalize.rs b/compiler/rustc_infer/src/infer/relate/generalize.rs
index aaea3b4820b..225c126fcf8 100644
--- a/compiler/rustc_infer/src/infer/relate/generalize.rs
+++ b/compiler/rustc_infer/src/infer/relate/generalize.rs
@@ -653,7 +653,7 @@ impl<'tcx> TypeRelation<'tcx> for Generalizer<'_, 'tcx> {
                             {
                                 variable_table.union(vid, new_var_id);
                             }
-                            Ok(ty::Const::new_var(self.tcx(), new_var_id, c.ty()))
+                            Ok(ty::Const::new_var(self.tcx(), new_var_id))
                         }
                     }
                 }
@@ -671,11 +671,7 @@ impl<'tcx> TypeRelation<'tcx> for Generalizer<'_, 'tcx> {
                     args,
                     args,
                 )?;
-                Ok(ty::Const::new_unevaluated(
-                    self.tcx(),
-                    ty::UnevaluatedConst { def, args },
-                    c.ty(),
-                ))
+                Ok(ty::Const::new_unevaluated(self.tcx(), ty::UnevaluatedConst { def, args }))
             }
             ty::ConstKind::Placeholder(placeholder) => {
                 if self.for_universe.can_name(placeholder.universe) {
diff --git a/compiler/rustc_infer/src/infer/relate/higher_ranked.rs b/compiler/rustc_infer/src/infer/relate/higher_ranked.rs
index 70ed7cf9af1..d3001eb5838 100644
--- a/compiler/rustc_infer/src/infer/relate/higher_ranked.rs
+++ b/compiler/rustc_infer/src/infer/relate/higher_ranked.rs
@@ -43,11 +43,10 @@ impl<'tcx> InferCtxt<'tcx> {
                     ty::PlaceholderType { universe: next_universe, bound: bound_ty },
                 )
             },
-            consts: &mut |bound_var: ty::BoundVar, ty| {
+            consts: &mut |bound_var: ty::BoundVar| {
                 ty::Const::new_placeholder(
                     self.tcx,
                     ty::PlaceholderConst { universe: next_universe, bound: bound_var },
-                    ty,
                 )
             },
         };
diff --git a/compiler/rustc_infer/src/infer/snapshot/fudge.rs b/compiler/rustc_infer/src/infer/snapshot/fudge.rs
index 4408251c99d..a086c82c92e 100644
--- a/compiler/rustc_infer/src/infer/snapshot/fudge.rs
+++ b/compiler/rustc_infer/src/infer/snapshot/fudge.rs
@@ -244,7 +244,7 @@ impl<'a, 'tcx> TypeFolder<TyCtxt<'tcx>> for InferenceFudger<'a, 'tcx> {
                 // Recreate it with a fresh variable here.
                 let idx = vid.index() - self.const_vars.0.start.index();
                 let origin = self.const_vars.1[idx];
-                self.infcx.next_const_var_with_origin(ct.ty(), origin)
+                self.infcx.next_const_var_with_origin(origin)
             } else {
                 ct
             }
diff --git a/compiler/rustc_middle/src/mir/consts.rs b/compiler/rustc_middle/src/mir/consts.rs
index e107c2c12bd..5c069ff820d 100644
--- a/compiler/rustc_middle/src/mir/consts.rs
+++ b/compiler/rustc_middle/src/mir/consts.rs
@@ -237,7 +237,8 @@ impl<'tcx> Const<'tcx> {
     #[inline(always)]
     pub fn ty(&self) -> Ty<'tcx> {
         match self {
-            Const::Ty(c) => c.ty(),
+            // THISPR
+            Const::Ty(c) => todo!(),
             Const::Val(_, ty) | Const::Unevaluated(_, ty) => *ty,
         }
     }
@@ -260,7 +261,9 @@ impl<'tcx> Const<'tcx> {
     pub fn try_to_scalar(self) -> Option<Scalar> {
         match self {
             Const::Ty(c) => match c.kind() {
-                ty::ConstKind::Value(valtree) if c.ty().is_primitive() => {
+                // THISPR
+                // if c.ty().is_primitive()
+                ty::ConstKind::Value(valtree) if todo!() => {
                     // A valtree of a type where leaves directly represent the scalar const value.
                     // Just checking whether it is a leaf is insufficient as e.g. references are leafs
                     // but the leaf value is the value they point to, not the reference itself!
@@ -279,9 +282,9 @@ impl<'tcx> Const<'tcx> {
         match self {
             Const::Val(ConstValue::Scalar(Scalar::Int(x)), _) => Some(x),
             Const::Ty(c) => match c.kind() {
-                ty::ConstKind::Value(valtree) if c.ty().is_primitive() => {
-                    Some(valtree.unwrap_leaf())
-                }
+                // THISPR
+                // if c.ty().is_primitive()
+                ty::ConstKind::Value(valtree) if todo!() => Some(valtree.unwrap_leaf()),
                 _ => None,
             },
             _ => None,
@@ -326,7 +329,7 @@ impl<'tcx> Const<'tcx> {
         match self.eval(tcx, param_env, DUMMY_SP) {
             Ok(val) => Self::Val(val, self.ty()),
             Err(ErrorHandled::Reported(guar, _span)) => {
-                Self::Ty(ty::Const::new_error(tcx, guar.into(), self.ty()))
+                Self::Ty(ty::Const::new_error(tcx, guar.into()))
             }
             Err(ErrorHandled::TooGeneric(_span)) => self,
         }
@@ -339,7 +342,9 @@ impl<'tcx> Const<'tcx> {
         param_env: ty::ParamEnv<'tcx>,
     ) -> Option<Scalar> {
         match self {
-            Const::Ty(c) if c.ty().is_primitive() => {
+            // THISPR
+            // c.ty().is_primitive()
+            Const::Ty(c) if todo!() => {
                 // Avoid the `valtree_to_const_val` query. Can only be done on primitive types that
                 // are valtree leaves, and *not* on references. (References should return the
                 // pointer here, which valtrees don't represent.)
@@ -443,8 +448,9 @@ impl<'tcx> Const<'tcx> {
         match c.kind() {
             ty::ConstKind::Value(valtree) => {
                 // Make sure that if `c` is normalized, then the return value is normalized.
-                let const_val = tcx.valtree_to_const_val((c.ty(), valtree));
-                Self::Val(const_val, c.ty())
+                // THISPR
+                let const_val = tcx.valtree_to_const_val((todo!(), valtree));
+                Self::Val(const_val, todo!())
             }
             _ => Self::Ty(c),
         }
@@ -463,7 +469,9 @@ impl<'tcx> Const<'tcx> {
                 // A valtree may be a reference. Valtree references correspond to a
                 // different allocation each time they are evaluated. Valtrees for primitive
                 // types are fine though.
-                ty::ConstKind::Value(_) => c.ty().is_primitive(),
+                // THISPR
+                // c.ty().is_primitive()
+                ty::ConstKind::Value(_) => todo!(),
                 ty::ConstKind::Unevaluated(..) | ty::ConstKind::Expr(..) => false,
                 // This can happen if evaluation of a constant failed. The result does not matter
                 // much since compilation is doomed.
diff --git a/compiler/rustc_middle/src/ty/abstract_const.rs b/compiler/rustc_middle/src/ty/abstract_const.rs
index 7fb5e9aadae..254e1b54481 100644
--- a/compiler/rustc_middle/src/ty/abstract_const.rs
+++ b/compiler/rustc_middle/src/ty/abstract_const.rs
@@ -53,7 +53,7 @@ impl<'tcx> TyCtxt<'tcx> {
             fn fold_const(&mut self, c: Const<'tcx>) -> Const<'tcx> {
                 let ct = match c.kind() {
                     ty::ConstKind::Unevaluated(uv) => match self.tcx.thir_abstract_const(uv.def) {
-                        Err(e) => ty::Const::new_error(self.tcx, e, c.ty()),
+                        Err(e) => ty::Const::new_error(self.tcx, e),
                         Ok(Some(bac)) => {
                             let args = self.tcx.erase_regions(uv.args);
                             let bac = bac.instantiate(self.tcx, args);
diff --git a/compiler/rustc_middle/src/ty/codec.rs b/compiler/rustc_middle/src/ty/codec.rs
index 07652b47929..33f564e9b59 100644
--- a/compiler/rustc_middle/src/ty/codec.rs
+++ b/compiler/rustc_middle/src/ty/codec.rs
@@ -350,8 +350,8 @@ impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> RefDecodable<'tcx, D>
 
 impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<D> for ty::Const<'tcx> {
     fn decode(decoder: &mut D) -> Self {
-        let consts: ty::ConstData<'tcx> = Decodable::decode(decoder);
-        decoder.interner().mk_ct_from_kind(consts.kind, consts.ty)
+        let kind: ty::ConstKind<'tcx> = Decodable::decode(decoder);
+        decoder.interner().mk_ct_from_kind(kind)
     }
 }
 
diff --git a/compiler/rustc_middle/src/ty/consts.rs b/compiler/rustc_middle/src/ty/consts.rs
index 384a4e7009d..7e84b763fa8 100644
--- a/compiler/rustc_middle/src/ty/consts.rs
+++ b/compiler/rustc_middle/src/ty/consts.rs
@@ -6,7 +6,7 @@ use rustc_error_messages::MultiSpan;
 use rustc_hir as hir;
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::def_id::LocalDefId;
-use rustc_macros::{HashStable, TyDecodable, TyEncodable};
+use rustc_macros::HashStable;
 use rustc_type_ir::{self as ir, TypeFlags, WithCachedTypeInfo};
 use tracing::{debug, instrument};
 
@@ -26,10 +26,9 @@ pub type UnevaluatedConst<'tcx> = ir::UnevaluatedConst<TyCtxt<'tcx>>;
 #[cfg(target_pointer_width = "64")]
 rustc_data_structures::static_assert_size!(ConstKind<'_>, 24);
 
-/// Use this rather than `ConstData`, whenever possible.
 #[derive(Copy, Clone, PartialEq, Eq, Hash, HashStable)]
 #[rustc_pass_by_value]
-pub struct Const<'tcx>(pub(super) Interned<'tcx, WithCachedTypeInfo<ConstData<'tcx>>>);
+pub struct Const<'tcx>(pub(super) Interned<'tcx, WithCachedTypeInfo<ConstKind<'tcx>>>);
 
 impl<'tcx> rustc_type_ir::inherent::IntoKind for Const<'tcx> {
     type Kind = ConstKind<'tcx>;
@@ -49,26 +48,11 @@ impl<'tcx> rustc_type_ir::visit::Flags for Const<'tcx> {
     }
 }
 
-/// Typed constant value.
-#[derive(Copy, Clone, PartialEq, Eq, Hash)]
-#[derive(HashStable, TyEncodable, TyDecodable)]
-pub struct ConstData<'tcx> {
-    pub ty: Ty<'tcx>,
-    pub kind: ConstKind<'tcx>,
-}
-
-#[cfg(target_pointer_width = "64")]
-rustc_data_structures::static_assert_size!(ConstData<'_>, 32);
-
 impl<'tcx> Const<'tcx> {
     #[inline]
-    pub fn ty(self) -> Ty<'tcx> {
-        self.0.ty
-    }
-
-    #[inline]
     pub fn kind(self) -> ConstKind<'tcx> {
-        self.0.kind
+        let a: &ConstKind<'tcx> = self.0.0;
+        *a
     }
 
     // FIXME(compiler-errors): Think about removing this.
@@ -84,28 +68,28 @@ impl<'tcx> Const<'tcx> {
     }
 
     #[inline]
-    pub fn new(tcx: TyCtxt<'tcx>, kind: ty::ConstKind<'tcx>, ty: Ty<'tcx>) -> Const<'tcx> {
-        tcx.mk_ct_from_kind(kind, ty)
+    pub fn new(tcx: TyCtxt<'tcx>, kind: ty::ConstKind<'tcx>) -> Const<'tcx> {
+        tcx.mk_ct_from_kind(kind)
     }
 
     #[inline]
-    pub fn new_param(tcx: TyCtxt<'tcx>, param: ty::ParamConst, ty: Ty<'tcx>) -> Const<'tcx> {
-        Const::new(tcx, ty::ConstKind::Param(param), ty)
+    pub fn new_param(tcx: TyCtxt<'tcx>, param: ty::ParamConst) -> Const<'tcx> {
+        Const::new(tcx, ty::ConstKind::Param(param))
     }
 
     #[inline]
-    pub fn new_var(tcx: TyCtxt<'tcx>, infer: ty::ConstVid, ty: Ty<'tcx>) -> Const<'tcx> {
-        Const::new(tcx, ty::ConstKind::Infer(ty::InferConst::Var(infer)), ty)
+    pub fn new_var(tcx: TyCtxt<'tcx>, infer: ty::ConstVid) -> Const<'tcx> {
+        Const::new(tcx, ty::ConstKind::Infer(ty::InferConst::Var(infer)))
     }
 
     #[inline]
-    pub fn new_fresh(tcx: TyCtxt<'tcx>, fresh: u32, ty: Ty<'tcx>) -> Const<'tcx> {
-        Const::new(tcx, ty::ConstKind::Infer(ty::InferConst::Fresh(fresh)), ty)
+    pub fn new_fresh(tcx: TyCtxt<'tcx>, fresh: u32) -> Const<'tcx> {
+        Const::new(tcx, ty::ConstKind::Infer(ty::InferConst::Fresh(fresh)))
     }
 
     #[inline]
-    pub fn new_infer(tcx: TyCtxt<'tcx>, infer: ty::InferConst, ty: Ty<'tcx>) -> Const<'tcx> {
-        Const::new(tcx, ty::ConstKind::Infer(infer), ty)
+    pub fn new_infer(tcx: TyCtxt<'tcx>, infer: ty::InferConst) -> Const<'tcx> {
+        Const::new(tcx, ty::ConstKind::Infer(infer))
     }
 
     #[inline]
@@ -113,50 +97,40 @@ impl<'tcx> Const<'tcx> {
         tcx: TyCtxt<'tcx>,
         debruijn: ty::DebruijnIndex,
         var: ty::BoundVar,
-        ty: Ty<'tcx>,
     ) -> Const<'tcx> {
-        Const::new(tcx, ty::ConstKind::Bound(debruijn, var), ty)
+        Const::new(tcx, ty::ConstKind::Bound(debruijn, var))
     }
 
     #[inline]
-    pub fn new_placeholder(
-        tcx: TyCtxt<'tcx>,
-        placeholder: ty::PlaceholderConst,
-        ty: Ty<'tcx>,
-    ) -> Const<'tcx> {
-        Const::new(tcx, ty::ConstKind::Placeholder(placeholder), ty)
+    pub fn new_placeholder(tcx: TyCtxt<'tcx>, placeholder: ty::PlaceholderConst) -> Const<'tcx> {
+        Const::new(tcx, ty::ConstKind::Placeholder(placeholder))
     }
 
     #[inline]
-    pub fn new_unevaluated(
-        tcx: TyCtxt<'tcx>,
-        uv: ty::UnevaluatedConst<'tcx>,
-        ty: Ty<'tcx>,
-    ) -> Const<'tcx> {
-        Const::new(tcx, ty::ConstKind::Unevaluated(uv), ty)
+    pub fn new_unevaluated(tcx: TyCtxt<'tcx>, uv: ty::UnevaluatedConst<'tcx>) -> Const<'tcx> {
+        Const::new(tcx, ty::ConstKind::Unevaluated(uv))
     }
 
     #[inline]
     pub fn new_value(tcx: TyCtxt<'tcx>, val: ty::ValTree<'tcx>, ty: Ty<'tcx>) -> Const<'tcx> {
-        Const::new(tcx, ty::ConstKind::Value(val), ty)
+        Const::new(tcx, ty::ConstKind::Value(ty, val))
     }
 
     #[inline]
-    pub fn new_expr(tcx: TyCtxt<'tcx>, expr: ty::Expr<'tcx>, ty: Ty<'tcx>) -> Const<'tcx> {
-        Const::new(tcx, ty::ConstKind::Expr(expr), ty)
+    pub fn new_expr(tcx: TyCtxt<'tcx>, expr: ty::Expr<'tcx>) -> Const<'tcx> {
+        Const::new(tcx, ty::ConstKind::Expr(expr))
     }
 
     #[inline]
-    pub fn new_error(tcx: TyCtxt<'tcx>, e: ty::ErrorGuaranteed, ty: Ty<'tcx>) -> Const<'tcx> {
-        Const::new(tcx, ty::ConstKind::Error(e), ty)
+    pub fn new_error(tcx: TyCtxt<'tcx>, e: ty::ErrorGuaranteed) -> Const<'tcx> {
+        Const::new(tcx, ty::ConstKind::Error(e))
     }
 
     /// Like [Ty::new_error] but for constants.
     #[track_caller]
-    pub fn new_misc_error(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Const<'tcx> {
+    pub fn new_misc_error(tcx: TyCtxt<'tcx>) -> Const<'tcx> {
         Const::new_error_with_message(
             tcx,
-            ty,
             DUMMY_SP,
             "ty::ConstKind::Error constructed but no error reported",
         )
@@ -166,48 +140,33 @@ impl<'tcx> Const<'tcx> {
     #[track_caller]
     pub fn new_error_with_message<S: Into<MultiSpan>>(
         tcx: TyCtxt<'tcx>,
-        ty: Ty<'tcx>,
         span: S,
         msg: &'static str,
     ) -> Const<'tcx> {
         let reported = tcx.dcx().span_delayed_bug(span, msg);
-        Const::new_error(tcx, reported, ty)
+        Const::new_error(tcx, reported)
     }
 }
 
 impl<'tcx> rustc_type_ir::inherent::Const<TyCtxt<'tcx>> for Const<'tcx> {
-    fn new_infer(tcx: TyCtxt<'tcx>, infer: ty::InferConst, ty: Ty<'tcx>) -> Self {
-        Const::new_infer(tcx, infer, ty)
+    fn new_infer(tcx: TyCtxt<'tcx>, infer: ty::InferConst) -> Self {
+        Const::new_infer(tcx, infer)
     }
 
-    fn new_var(tcx: TyCtxt<'tcx>, vid: ty::ConstVid, ty: Ty<'tcx>) -> Self {
-        Const::new_var(tcx, vid, ty)
+    fn new_var(tcx: TyCtxt<'tcx>, vid: ty::ConstVid) -> Self {
+        Const::new_var(tcx, vid)
     }
 
-    fn new_bound(
-        interner: TyCtxt<'tcx>,
-        debruijn: ty::DebruijnIndex,
-        var: ty::BoundVar,
-        ty: Ty<'tcx>,
-    ) -> Self {
-        Const::new_bound(interner, debruijn, var, ty)
+    fn new_bound(interner: TyCtxt<'tcx>, debruijn: ty::DebruijnIndex, var: ty::BoundVar) -> Self {
+        Const::new_bound(interner, debruijn, var)
     }
 
-    fn new_anon_bound(
-        tcx: TyCtxt<'tcx>,
-        debruijn: ty::DebruijnIndex,
-        var: ty::BoundVar,
-        ty: Ty<'tcx>,
-    ) -> Self {
-        Const::new_bound(tcx, debruijn, var, ty)
+    fn new_anon_bound(tcx: TyCtxt<'tcx>, debruijn: ty::DebruijnIndex, var: ty::BoundVar) -> Self {
+        Const::new_bound(tcx, debruijn, var)
     }
 
-    fn new_unevaluated(
-        interner: TyCtxt<'tcx>,
-        uv: ty::UnevaluatedConst<'tcx>,
-        ty: Ty<'tcx>,
-    ) -> Self {
-        Const::new_unevaluated(interner, uv, ty)
+    fn new_unevaluated(interner: TyCtxt<'tcx>, uv: ty::UnevaluatedConst<'tcx>) -> Self {
+        Const::new_unevaluated(interner, uv)
     }
 
     fn ty(self) -> Ty<'tcx> {
@@ -241,7 +200,6 @@ impl<'tcx> Const<'tcx> {
                     def: def.to_def_id(),
                     args: GenericArgs::identity_for_item(tcx, def.to_def_id()),
                 },
-                ty,
             ),
         }
     }
@@ -293,9 +251,6 @@ impl<'tcx> Const<'tcx> {
                 _,
                 &hir::Path { res: Res::Def(DefKind::ConstParam, def_id), .. },
             )) => {
-                // Use the type from the param's definition, since we can resolve it,
-                // not the expected parameter type from WithOptConstParam.
-                let param_ty = tcx.type_of(def_id).instantiate_identity();
                 match tcx.named_bound_var(expr.hir_id) {
                     Some(rbv::ResolvedArg::EarlyBound(_)) => {
                         // Find the name and index of the const parameter by indexing the generics of
@@ -304,19 +259,12 @@ impl<'tcx> Const<'tcx> {
                         let generics = tcx.generics_of(item_def_id);
                         let index = generics.param_def_id_to_index[&def_id];
                         let name = tcx.item_name(def_id);
-                        Some(ty::Const::new_param(tcx, ty::ParamConst::new(index, name), param_ty))
+                        Some(ty::Const::new_param(tcx, ty::ParamConst::new(index, name)))
                     }
                     Some(rbv::ResolvedArg::LateBound(debruijn, index, _)) => {
-                        Some(ty::Const::new_bound(
-                            tcx,
-                            debruijn,
-                            ty::BoundVar::from_u32(index),
-                            param_ty,
-                        ))
-                    }
-                    Some(rbv::ResolvedArg::Error(guar)) => {
-                        Some(ty::Const::new_error(tcx, guar, param_ty))
+                        Some(ty::Const::new_bound(tcx, debruijn, ty::BoundVar::from_u32(index)))
                     }
+                    Some(rbv::ResolvedArg::Error(guar)) => Some(ty::Const::new_error(tcx, guar)),
                     arg => bug!("unexpected bound var resolution for {:?}: {arg:?}", expr.hir_id),
                 }
             }
@@ -397,8 +345,8 @@ impl<'tcx> Const<'tcx> {
     #[inline]
     pub fn normalize(self, tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>) -> Self {
         match self.eval(tcx, param_env, DUMMY_SP) {
-            Ok(val) => Self::new_value(tcx, val, self.ty()),
-            Err(ErrorHandled::Reported(r, _span)) => Self::new_error(tcx, r.into(), self.ty()),
+            Ok(val) => Self::new_value(tcx, val, self.ty_for_ctfe(tcx).unwrap()),
+            Err(ErrorHandled::Reported(r, _span)) => Self::new_error(tcx, r.into()),
             Err(ErrorHandled::TooGeneric(_span)) => self,
         }
     }
@@ -430,8 +378,12 @@ impl<'tcx> Const<'tcx> {
     /// contains const generic parameters or pointers).
     pub fn try_eval_bits(self, tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>) -> Option<u128> {
         let int = self.try_eval_scalar_int(tcx, param_env)?;
-        let size =
-            tcx.layout_of(param_env.with_reveal_all_normalized(tcx).and(self.ty())).ok()?.size;
+        let size = tcx
+            .layout_of(
+                param_env.with_reveal_all_normalized(tcx).and(self.ty_for_ctfe(tcx).unwrap()),
+            )
+            .ok()?
+            .size;
         // if `ty` does not depend on generic parameters, use an empty param_env
         int.try_to_bits(size).ok()
     }
@@ -440,7 +392,7 @@ impl<'tcx> Const<'tcx> {
     /// Panics if the value cannot be evaluated or doesn't contain a valid integer of the given type.
     pub fn eval_bits(self, tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>) -> u128 {
         self.try_eval_bits(tcx, param_env)
-            .unwrap_or_else(|| bug!("expected bits of {:#?}, got {:#?}", self.ty(), self))
+            .unwrap_or_else(|| bug!("failed to evalate {:#?} to bits", self))
     }
 
     #[inline]
diff --git a/compiler/rustc_middle/src/ty/context.rs b/compiler/rustc_middle/src/ty/context.rs
index 47f66c64406..7e8b3fea1ea 100644
--- a/compiler/rustc_middle/src/ty/context.rs
+++ b/compiler/rustc_middle/src/ty/context.rs
@@ -28,10 +28,10 @@ use crate::traits::solve::{
 };
 use crate::ty::predicate::ExistentialPredicateStableCmpExt as _;
 use crate::ty::{
-    self, AdtDef, AdtDefData, AdtKind, Binder, Clause, Clauses, Const, ConstData,
-    GenericParamDefKind, ImplPolarity, List, ListWithCachedTypeInfo, ParamConst, ParamTy, Pattern,
-    PatternKind, PolyExistentialPredicate, PolyFnSig, Predicate, PredicateKind, PredicatePolarity,
-    Region, RegionKind, ReprOptions, TraitObjectVisitor, Ty, TyKind, TyVid, Visibility,
+    self, AdtDef, AdtDefData, AdtKind, Binder, Clause, Clauses, Const, GenericParamDefKind,
+    ImplPolarity, List, ListWithCachedTypeInfo, ParamConst, ParamTy, Pattern, PatternKind,
+    PolyExistentialPredicate, PolyFnSig, Predicate, PredicateKind, PredicatePolarity, Region,
+    RegionKind, ReprOptions, TraitObjectVisitor, Ty, TyKind, TyVid, Visibility,
 };
 use crate::ty::{GenericArg, GenericArgs, GenericArgsRef};
 use rustc_ast::{self as ast, attr};
@@ -268,7 +268,7 @@ pub struct CtxtInterners<'tcx> {
     clauses: InternedSet<'tcx, ListWithCachedTypeInfo<Clause<'tcx>>>,
     projs: InternedSet<'tcx, List<ProjectionKind>>,
     place_elems: InternedSet<'tcx, List<PlaceElem<'tcx>>>,
-    const_: InternedSet<'tcx, WithCachedTypeInfo<ConstData<'tcx>>>,
+    const_: InternedSet<'tcx, WithCachedTypeInfo<ty::ConstKind<'tcx>>>,
     pat: InternedSet<'tcx, PatternKind<'tcx>>,
     const_allocation: InternedSet<'tcx, Allocation>,
     bound_variable_kinds: InternedSet<'tcx, List<ty::BoundVariableKind>>,
@@ -338,18 +338,18 @@ impl<'tcx> CtxtInterners<'tcx> {
     #[inline(never)]
     fn intern_const(
         &self,
-        data: ty::ConstData<'tcx>,
+        kind: ty::ConstKind<'tcx>,
         sess: &Session,
         untracked: &Untracked,
     ) -> Const<'tcx> {
         Const(Interned::new_unchecked(
             self.const_
-                .intern(data, |data: ConstData<'_>| {
-                    let flags = super::flags::FlagComputation::for_const(&data.kind, data.ty);
-                    let stable_hash = self.stable_hash(&flags, sess, untracked, &data);
+                .intern(kind, |kind: ty::ConstKind<'_>| {
+                    let flags = super::flags::FlagComputation::for_const_kind(&kind);
+                    let stable_hash = self.stable_hash(&flags, sess, untracked, &kind);
 
                     InternedInSet(self.arena.alloc(WithCachedTypeInfo {
-                        internee: data,
+                        internee: kind,
                         stable_hash,
                         flags: flags.flags,
                         outer_exclusive_binder: flags.outer_exclusive_binder,
@@ -601,18 +601,9 @@ impl<'tcx> CommonConsts<'tcx> {
         };
 
         CommonConsts {
-            unit: mk_const(ty::ConstData {
-                kind: ty::ConstKind::Value(ty::ValTree::zst()),
-                ty: types.unit,
-            }),
-            true_: mk_const(ty::ConstData {
-                kind: ty::ConstKind::Value(ty::ValTree::Leaf(ty::ScalarInt::TRUE)),
-                ty: types.bool,
-            }),
-            false_: mk_const(ty::ConstData {
-                kind: ty::ConstKind::Value(ty::ValTree::Leaf(ty::ScalarInt::FALSE)),
-                ty: types.bool,
-            }),
+            unit: mk_const(ty::ConstKind::Value(ty::ValTree::zst())),
+            true_: mk_const(ty::ConstKind::Value(ty::ValTree::Leaf(ty::ScalarInt::TRUE))),
+            false_: mk_const(ty::ConstKind::Value(ty::ValTree::Leaf(ty::ScalarInt::FALSE))),
         }
     }
 }
@@ -2225,9 +2216,9 @@ impl<'tcx> TyCtxt<'tcx> {
     }
 
     #[inline]
-    pub fn mk_ct_from_kind(self, kind: ty::ConstKind<'tcx>, ty: Ty<'tcx>) -> Const<'tcx> {
+    pub fn mk_ct_from_kind(self, kind: ty::ConstKind<'tcx>) -> Const<'tcx> {
         self.interners.intern_const(
-            ty::ConstData { kind, ty },
+            kind,
             self.sess,
             // This is only used to create a stable hashing context.
             &self.untracked,
@@ -2252,14 +2243,10 @@ impl<'tcx> TyCtxt<'tcx> {
                 ty::Region::new_early_param(self, param.to_early_bound_region_data()).into()
             }
             GenericParamDefKind::Type { .. } => Ty::new_param(self, param.index, param.name).into(),
-            GenericParamDefKind::Const { .. } => ty::Const::new_param(
-                self,
-                ParamConst { index: param.index, name: param.name },
-                self.type_of(param.def_id)
-                    .no_bound_vars()
-                    .expect("const parameter types cannot be generic"),
-            )
-            .into(),
+            GenericParamDefKind::Const { .. } => {
+                ty::Const::new_param(self, ParamConst { index: param.index, name: param.name })
+                    .into()
+            }
         }
     }
 
diff --git a/compiler/rustc_middle/src/ty/flags.rs b/compiler/rustc_middle/src/ty/flags.rs
index 93a51d3a334..5f653aba485 100644
--- a/compiler/rustc_middle/src/ty/flags.rs
+++ b/compiler/rustc_middle/src/ty/flags.rs
@@ -28,10 +28,9 @@ impl FlagComputation {
         result
     }
 
-    pub fn for_const(c: &ty::ConstKind<'_>, t: Ty<'_>) -> FlagComputation {
+    pub fn for_const_kind(kind: &ty::ConstKind<'_>) -> FlagComputation {
         let mut result = FlagComputation::new();
-        result.add_const_kind(c);
-        result.add_ty(t);
+        result.add_const_kind(kind);
         result
     }
 
diff --git a/compiler/rustc_middle/src/ty/fold.rs b/compiler/rustc_middle/src/ty/fold.rs
index b5b36cbd1ba..9b5b1430c27 100644
--- a/compiler/rustc_middle/src/ty/fold.rs
+++ b/compiler/rustc_middle/src/ty/fold.rs
@@ -134,13 +134,13 @@ impl<'a, 'tcx> TypeFolder<TyCtxt<'tcx>> for RegionFolder<'a, 'tcx> {
 pub trait BoundVarReplacerDelegate<'tcx> {
     fn replace_region(&mut self, br: ty::BoundRegion) -> ty::Region<'tcx>;
     fn replace_ty(&mut self, bt: ty::BoundTy) -> Ty<'tcx>;
-    fn replace_const(&mut self, bv: ty::BoundVar, ty: Ty<'tcx>) -> ty::Const<'tcx>;
+    fn replace_const(&mut self, bv: ty::BoundVar) -> ty::Const<'tcx>;
 }
 
 pub struct FnMutDelegate<'a, 'tcx> {
     pub regions: &'a mut (dyn FnMut(ty::BoundRegion) -> ty::Region<'tcx> + 'a),
     pub types: &'a mut (dyn FnMut(ty::BoundTy) -> Ty<'tcx> + 'a),
-    pub consts: &'a mut (dyn FnMut(ty::BoundVar, Ty<'tcx>) -> ty::Const<'tcx> + 'a),
+    pub consts: &'a mut (dyn FnMut(ty::BoundVar) -> ty::Const<'tcx> + 'a),
 }
 
 impl<'a, 'tcx> BoundVarReplacerDelegate<'tcx> for FnMutDelegate<'a, 'tcx> {
@@ -150,8 +150,8 @@ impl<'a, 'tcx> BoundVarReplacerDelegate<'tcx> for FnMutDelegate<'a, 'tcx> {
     fn replace_ty(&mut self, bt: ty::BoundTy) -> Ty<'tcx> {
         (self.types)(bt)
     }
-    fn replace_const(&mut self, bv: ty::BoundVar, ty: Ty<'tcx>) -> ty::Const<'tcx> {
-        (self.consts)(bv, ty)
+    fn replace_const(&mut self, bv: ty::BoundVar) -> ty::Const<'tcx> {
+        (self.consts)(bv)
     }
 }
 
@@ -224,7 +224,7 @@ where
     fn fold_const(&mut self, ct: ty::Const<'tcx>) -> ty::Const<'tcx> {
         match ct.kind() {
             ty::ConstKind::Bound(debruijn, bound_const) if debruijn == self.current_index => {
-                let ct = self.delegate.replace_const(bound_const, ct.ty());
+                let ct = self.delegate.replace_const(bound_const);
                 debug_assert!(!ct.has_vars_bound_above(ty::INNERMOST));
                 ty::fold::shift_vars(self.tcx, ct, self.current_index.as_u32())
             }
@@ -282,7 +282,7 @@ impl<'tcx> TyCtxt<'tcx> {
             let delegate = FnMutDelegate {
                 regions: &mut replace_regions,
                 types: &mut |b| bug!("unexpected bound ty in binder: {b:?}"),
-                consts: &mut |b, ty| bug!("unexpected bound ct in binder: {b:?} {ty}"),
+                consts: &mut |b| bug!("unexpected bound ct in binder: {b:?}"),
             };
             let mut replacer = BoundVarReplacer::new(self, delegate);
             value.fold_with(&mut replacer)
@@ -353,9 +353,7 @@ impl<'tcx> TyCtxt<'tcx> {
                         ty::BoundTy { var: shift_bv(t.var), kind: t.kind },
                     )
                 },
-                consts: &mut |c, ty: Ty<'tcx>| {
-                    ty::Const::new_bound(self, ty::INNERMOST, shift_bv(c), ty)
-                },
+                consts: &mut |c| ty::Const::new_bound(self, ty::INNERMOST, shift_bv(c)),
             },
         )
     }
@@ -398,12 +396,12 @@ impl<'tcx> TyCtxt<'tcx> {
                     .expect_ty();
                 Ty::new_bound(self.tcx, ty::INNERMOST, BoundTy { var, kind })
             }
-            fn replace_const(&mut self, bv: ty::BoundVar, ty: Ty<'tcx>) -> ty::Const<'tcx> {
+            fn replace_const(&mut self, bv: ty::BoundVar) -> ty::Const<'tcx> {
                 let entry = self.map.entry(bv);
                 let index = entry.index();
                 let var = ty::BoundVar::from_usize(index);
                 let () = entry.or_insert_with(|| ty::BoundVariableKind::Const).expect_const();
-                ty::Const::new_bound(self.tcx, ty::INNERMOST, var, ty)
+                ty::Const::new_bound(self.tcx, ty::INNERMOST, var)
             }
         }
 
diff --git a/compiler/rustc_middle/src/ty/generic_args.rs b/compiler/rustc_middle/src/ty/generic_args.rs
index c3ab755175d..7fff3d01324 100644
--- a/compiler/rustc_middle/src/ty/generic_args.rs
+++ b/compiler/rustc_middle/src/ty/generic_args.rs
@@ -228,7 +228,7 @@ impl<'tcx> GenericArg<'tcx> {
                     ptr.cast::<WithCachedTypeInfo<ty::TyKind<'tcx>>>().as_ref(),
                 ))),
                 CONST_TAG => GenericArgKind::Const(ty::Const(Interned::new_unchecked(
-                    ptr.cast::<WithCachedTypeInfo<ty::ConstData<'tcx>>>().as_ref(),
+                    ptr.cast::<WithCachedTypeInfo<ty::ConstKind<'tcx>>>().as_ref(),
                 ))),
                 _ => intrinsics::unreachable(),
             }
@@ -454,11 +454,11 @@ impl<'tcx> GenericArgs<'tcx> {
         def_id: DefId,
         original_args: &[GenericArg<'tcx>],
     ) -> GenericArgsRef<'tcx> {
-        ty::GenericArgs::for_item(tcx, def_id, |def, args| {
+        ty::GenericArgs::for_item(tcx, def_id, |def, _| {
             if let Some(arg) = original_args.get(def.index as usize) {
                 *arg
             } else {
-                def.to_error(tcx, args)
+                def.to_error(tcx)
             }
         })
     }
diff --git a/compiler/rustc_middle/src/ty/generics.rs b/compiler/rustc_middle/src/ty/generics.rs
index 89ba8cd2ad4..185dbe44735 100644
--- a/compiler/rustc_middle/src/ty/generics.rs
+++ b/compiler/rustc_middle/src/ty/generics.rs
@@ -100,19 +100,11 @@ impl GenericParamDef {
         }
     }
 
-    pub fn to_error<'tcx>(
-        &self,
-        tcx: TyCtxt<'tcx>,
-        preceding_args: &[ty::GenericArg<'tcx>],
-    ) -> ty::GenericArg<'tcx> {
+    pub fn to_error<'tcx>(&self, tcx: TyCtxt<'tcx>) -> ty::GenericArg<'tcx> {
         match &self.kind {
             ty::GenericParamDefKind::Lifetime => ty::Region::new_error_misc(tcx).into(),
             ty::GenericParamDefKind::Type { .. } => Ty::new_misc_error(tcx).into(),
-            ty::GenericParamDefKind::Const { .. } => ty::Const::new_misc_error(
-                tcx,
-                tcx.type_of(self.def_id).instantiate(tcx, preceding_args),
-            )
-            .into(),
+            ty::GenericParamDefKind::Const { .. } => ty::Const::new_misc_error(tcx).into(),
         }
     }
 }
diff --git a/compiler/rustc_middle/src/ty/layout.rs b/compiler/rustc_middle/src/ty/layout.rs
index a2df90b2c0f..142872009bf 100644
--- a/compiler/rustc_middle/src/ty/layout.rs
+++ b/compiler/rustc_middle/src/ty/layout.rs
@@ -385,9 +385,7 @@ impl<'tcx> SizeSkeleton<'tcx> {
                     ),
                 }
             }
-            ty::Array(inner, len)
-                if len.ty() == tcx.types.usize && tcx.features().transmute_generic_consts =>
-            {
+            ty::Array(inner, len) if tcx.features().transmute_generic_consts => {
                 let len_eval = len.try_eval_target_usize(tcx, param_env);
                 if len_eval == Some(0) {
                     return Ok(SizeSkeleton::Known(Size::from_bytes(0)));
diff --git a/compiler/rustc_middle/src/ty/mod.rs b/compiler/rustc_middle/src/ty/mod.rs
index c6028ef74a9..fc42a11cff0 100644
--- a/compiler/rustc_middle/src/ty/mod.rs
+++ b/compiler/rustc_middle/src/ty/mod.rs
@@ -87,7 +87,7 @@ pub use self::closure::{
     CAPTURE_STRUCT_LOCAL,
 };
 pub use self::consts::{
-    Const, ConstData, ConstInt, ConstKind, Expr, ExprKind, ScalarInt, UnevaluatedConst, ValTree,
+    Const, ConstInt, ConstKind, Expr, ExprKind, ScalarInt, UnevaluatedConst, ValTree,
 };
 pub use self::context::{
     tls, CtxtInterners, CurrentGcx, DeducedParamAttrs, Feed, FreeRegionInfo, GlobalCtxt, Lift,
@@ -617,7 +617,7 @@ impl<'tcx> Term<'tcx> {
                     ptr.cast::<WithCachedTypeInfo<ty::TyKind<'tcx>>>().as_ref(),
                 ))),
                 CONST_TAG => TermKind::Const(ty::Const(Interned::new_unchecked(
-                    ptr.cast::<WithCachedTypeInfo<ty::ConstData<'tcx>>>().as_ref(),
+                    ptr.cast::<WithCachedTypeInfo<ty::ConstKind<'tcx>>>().as_ref(),
                 ))),
                 _ => core::intrinsics::unreachable(),
             }
diff --git a/compiler/rustc_middle/src/ty/opaque_types.rs b/compiler/rustc_middle/src/ty/opaque_types.rs
index bbcbcdce1b2..52902aadd7c 100644
--- a/compiler/rustc_middle/src/ty/opaque_types.rs
+++ b/compiler/rustc_middle/src/ty/opaque_types.rs
@@ -216,7 +216,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for ReverseMapper<'tcx> {
                             })
                             .emit_unless(self.ignore_errors);
 
-                        ty::Const::new_error(self.tcx, guar, ct.ty())
+                        ty::Const::new_error(self.tcx, guar)
                     }
                 }
             }
diff --git a/compiler/rustc_middle/src/ty/print/pretty.rs b/compiler/rustc_middle/src/ty/print/pretty.rs
index 1b37078e703..8fec654acc5 100644
--- a/compiler/rustc_middle/src/ty/print/pretty.rs
+++ b/compiler/rustc_middle/src/ty/print/pretty.rs
@@ -1467,7 +1467,7 @@ pub trait PrettyPrinter<'tcx>: Printer<'tcx> + fmt::Write {
                             write!(this, "_")?;
                             Ok(())
                         },
-                        |this| this.print_type(ct.ty()),
+                        |this| this.print_type(todo!()),
                         ": ",
                     )?;
                 } else {
@@ -1512,7 +1512,7 @@ pub trait PrettyPrinter<'tcx>: Printer<'tcx> + fmt::Write {
             },
             ty::ConstKind::Param(ParamConst { name, .. }) => p!(write("{}", name)),
             ty::ConstKind::Value(value) => {
-                return self.pretty_print_const_valtree(value, ct.ty(), print_ty);
+                return self.pretty_print_const_valtree(value, todo!(), print_ty);
             }
 
             ty::ConstKind::Bound(debruijn, bound_var) => {
diff --git a/compiler/rustc_middle/src/ty/relate.rs b/compiler/rustc_middle/src/ty/relate.rs
index a621d255a03..b0581f89380 100644
--- a/compiler/rustc_middle/src/ty/relate.rs
+++ b/compiler/rustc_middle/src/ty/relate.rs
@@ -652,18 +652,17 @@ pub fn structurally_relate_consts<'tcx, R: TypeRelation<'tcx>>(
         // and is the better alternative to waiting until `generic_const_exprs` can
         // be stabilized.
         (ty::ConstKind::Unevaluated(au), ty::ConstKind::Unevaluated(bu)) if au.def == bu.def => {
-            assert_eq!(a.ty(), b.ty());
+            let a_ty = tcx.type_of(au.def).instantiate(tcx, au.args);
+            let b_ty = tcx.type_of(bu.def).instantiate(tcx, bu.args);
+            assert_eq!(a_ty, b_ty);
+
             let args = relation.relate_with_variance(
                 ty::Variance::Invariant,
                 ty::VarianceDiagInfo::default(),
                 au.args,
                 bu.args,
             )?;
-            return Ok(ty::Const::new_unevaluated(
-                tcx,
-                ty::UnevaluatedConst { def: au.def, args },
-                a.ty(),
-            ));
+            return Ok(ty::Const::new_unevaluated(tcx, ty::UnevaluatedConst { def: au.def, args }));
         }
         (ty::ConstKind::Expr(ae), ty::ConstKind::Expr(be)) => {
             match (ae.kind, be.kind) {
@@ -676,7 +675,7 @@ pub fn structurally_relate_consts<'tcx, R: TypeRelation<'tcx>>(
             }
 
             let args = relation.relate(ae.args(), be.args())?;
-            return Ok(ty::Const::new_expr(tcx, ty::Expr::new(ae.kind, args), a.ty()));
+            return Ok(ty::Const::new_expr(tcx, ty::Expr::new(ae.kind, args)));
         }
         _ => false,
     };
diff --git a/compiler/rustc_middle/src/ty/structural_impls.rs b/compiler/rustc_middle/src/ty/structural_impls.rs
index 7a291b4dbff..ee235d3781b 100644
--- a/compiler/rustc_middle/src/ty/structural_impls.rs
+++ b/compiler/rustc_middle/src/ty/structural_impls.rs
@@ -210,17 +210,14 @@ impl<'tcx> DebugWithInfcx<TyCtxt<'tcx>> for ty::Const<'tcx> {
                     bug!("we checked that this is a valtree")
                 };
                 let mut cx = FmtPrinter::new(tcx, Namespace::ValueNS);
-                cx.pretty_print_const_valtree(valtree, lifted.ty(), /*print_ty*/ true)?;
+                // THISPR
+                todo!();
+                // cx.pretty_print_const_valtree(valtree, lifted.ty(), /*print_ty*/ true)?;
                 f.write_str(&cx.into_buffer())
             });
         }
         // Fall back to something verbose.
-        write!(
-            f,
-            "{kind:?}: {ty:?}",
-            ty = &this.map(|data| data.ty()),
-            kind = &this.map(|data| data.kind())
-        )
+        write!(f, "{kind:?}", kind = &this.map(|data| data.kind()))
     }
 }
 
@@ -647,7 +644,6 @@ impl<'tcx> TypeSuperFoldable<TyCtxt<'tcx>> for ty::Const<'tcx> {
         self,
         folder: &mut F,
     ) -> Result<Self, F::Error> {
-        let ty = self.ty().try_fold_with(folder)?;
         let kind = match self.kind() {
             ConstKind::Param(p) => ConstKind::Param(p.try_fold_with(folder)?),
             ConstKind::Infer(i) => ConstKind::Infer(i.try_fold_with(folder)?),
@@ -660,17 +656,12 @@ impl<'tcx> TypeSuperFoldable<TyCtxt<'tcx>> for ty::Const<'tcx> {
             ConstKind::Error(e) => ConstKind::Error(e.try_fold_with(folder)?),
             ConstKind::Expr(e) => ConstKind::Expr(e.try_fold_with(folder)?),
         };
-        if ty != self.ty() || kind != self.kind() {
-            Ok(folder.interner().mk_ct_from_kind(kind, ty))
-        } else {
-            Ok(self)
-        }
+        if kind != self.kind() { Ok(folder.interner().mk_ct_from_kind(kind)) } else { Ok(self) }
     }
 }
 
 impl<'tcx> TypeSuperVisitable<TyCtxt<'tcx>> for ty::Const<'tcx> {
     fn super_visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
-        try_visit!(self.ty().visit_with(visitor));
         match self.kind() {
             ConstKind::Param(p) => p.visit_with(visitor),
             ConstKind::Infer(i) => i.visit_with(visitor),
diff --git a/compiler/rustc_middle/src/ty/walk.rs b/compiler/rustc_middle/src/ty/walk.rs
index 58f69d772ec..9b313fc7bf0 100644
--- a/compiler/rustc_middle/src/ty/walk.rs
+++ b/compiler/rustc_middle/src/ty/walk.rs
@@ -212,21 +212,18 @@ fn push_inner<'tcx>(stack: &mut TypeWalkerStack<'tcx>, parent: GenericArg<'tcx>)
             }
         },
         GenericArgKind::Lifetime(_) => {}
-        GenericArgKind::Const(parent_ct) => {
-            stack.push(parent_ct.ty().into());
-            match parent_ct.kind() {
-                ty::ConstKind::Infer(_)
-                | ty::ConstKind::Param(_)
-                | ty::ConstKind::Placeholder(_)
-                | ty::ConstKind::Bound(..)
-                | ty::ConstKind::Value(_)
-                | ty::ConstKind::Error(_) => {}
+        GenericArgKind::Const(parent_ct) => match parent_ct.kind() {
+            ty::ConstKind::Infer(_)
+            | ty::ConstKind::Param(_)
+            | ty::ConstKind::Placeholder(_)
+            | ty::ConstKind::Bound(..)
+            | ty::ConstKind::Value(_)
+            | ty::ConstKind::Error(_) => {}
 
-                ty::ConstKind::Expr(expr) => stack.extend(expr.args().iter().rev()),
-                ty::ConstKind::Unevaluated(ct) => {
-                    stack.extend(ct.args.iter().rev());
-                }
+            ty::ConstKind::Expr(expr) => stack.extend(expr.args().iter().rev()),
+            ty::ConstKind::Unevaluated(ct) => {
+                stack.extend(ct.args.iter().rev());
             }
-        }
+        },
     }
 }
diff --git a/compiler/rustc_mir_build/src/build/expr/as_constant.rs b/compiler/rustc_mir_build/src/build/expr/as_constant.rs
index f7229326c54..5eed6995fff 100644
--- a/compiler/rustc_mir_build/src/build/expr/as_constant.rs
+++ b/compiler/rustc_mir_build/src/build/expr/as_constant.rs
@@ -50,9 +50,7 @@ pub(crate) fn as_constant_inner<'tcx>(
             let const_ = match lit_to_mir_constant(tcx, LitToConstInput { lit: &lit.node, ty, neg })
             {
                 Ok(c) => c,
-                Err(LitToConstError::Reported(guar)) => {
-                    Const::Ty(ty::Const::new_error(tcx, guar, ty))
-                }
+                Err(LitToConstError::Reported(guar)) => Const::Ty(ty::Const::new_error(tcx, guar)),
                 Err(LitToConstError::TypeError) => {
                     bug!("encountered type error in `lit_to_mir_constant`")
                 }
@@ -83,7 +81,7 @@ pub(crate) fn as_constant_inner<'tcx>(
             ConstOperand { user_ty, span, const_ }
         }
         ExprKind::ConstParam { param, def_id: _ } => {
-            let const_param = ty::Const::new_param(tcx, param, expr.ty);
+            let const_param = ty::Const::new_param(tcx, param);
             let const_ = Const::Ty(const_param);
 
             ConstOperand { user_ty: None, span, const_ }
diff --git a/compiler/rustc_next_trait_solver/src/canonicalizer.rs b/compiler/rustc_next_trait_solver/src/canonicalizer.rs
index 127ebde5fec..8b96519c321 100644
--- a/compiler/rustc_next_trait_solver/src/canonicalizer.rs
+++ b/compiler/rustc_next_trait_solver/src/canonicalizer.rs
@@ -386,23 +386,15 @@ impl<Infcx: InferCtxtLike<Interner = I>, I: Interner> TypeFolder<I>
     }
 
     fn fold_const(&mut self, c: I::Const) -> I::Const {
-        // We could canonicalize all consts with static types, but the only ones we
-        // *really* need to worry about are the ones that we end up putting into `CanonicalVarKind`
-        // since canonical vars can't reference other canonical vars.
-        let ty = c
-            .ty()
-            .fold_with(&mut RegionsToStatic { interner: self.interner(), binder: ty::INNERMOST });
         let kind = match c.kind() {
             ty::ConstKind::Infer(i) => match i {
                 ty::InferConst::Var(vid) => {
-                    // We compare `kind`s here because we've folded the `ty` with `RegionsToStatic`
-                    // so we'll get a mismatch in types if it actually changed any regions.
                     assert_eq!(
-                        self.infcx.opportunistic_resolve_ct_var(vid, ty).kind(),
-                        c.kind(),
-                        "region vid should have been resolved fully before canonicalization"
+                        self.infcx.opportunistic_resolve_ct_var(vid),
+                        c,
+                        "const vid should have been resolved fully before canonicalization"
                     );
-                    CanonicalVarKind::Const(self.infcx.universe_of_ct(vid).unwrap(), ty)
+                    CanonicalVarKind::Const(self.infcx.universe_of_ct(vid).unwrap())
                 }
                 ty::InferConst::EffectVar(_) => CanonicalVarKind::Effect,
                 ty::InferConst::Fresh(_) => todo!(),
@@ -410,16 +402,14 @@ impl<Infcx: InferCtxtLike<Interner = I>, I: Interner> TypeFolder<I>
             ty::ConstKind::Placeholder(placeholder) => match self.canonicalize_mode {
                 CanonicalizeMode::Input => CanonicalVarKind::PlaceholderConst(
                     PlaceholderLike::new(placeholder.universe(), self.variables.len().into()),
-                    ty,
                 ),
                 CanonicalizeMode::Response { .. } => {
-                    CanonicalVarKind::PlaceholderConst(placeholder, ty)
+                    CanonicalVarKind::PlaceholderConst(placeholder)
                 }
             },
             ty::ConstKind::Param(_) => match self.canonicalize_mode {
                 CanonicalizeMode::Input => CanonicalVarKind::PlaceholderConst(
                     PlaceholderLike::new(ty::UniverseIndex::ROOT, self.variables.len().into()),
-                    ty,
                 ),
                 CanonicalizeMode::Response { .. } => panic!("param ty in response: {c:?}"),
             },
@@ -440,34 +430,6 @@ impl<Infcx: InferCtxtLike<Interner = I>, I: Interner> TypeFolder<I>
             }),
         );
 
-        Const::new_anon_bound(self.interner(), self.binder_index, var, ty)
-    }
-}
-
-struct RegionsToStatic<I> {
-    interner: I,
-    binder: ty::DebruijnIndex,
-}
-
-impl<I: Interner> TypeFolder<I> for RegionsToStatic<I> {
-    fn interner(&self) -> I {
-        self.interner
-    }
-
-    fn fold_binder<T>(&mut self, t: ty::Binder<I, T>) -> ty::Binder<I, T>
-    where
-        T: TypeFoldable<I>,
-    {
-        self.binder.shift_in(1);
-        let t = t.super_fold_with(self);
-        self.binder.shift_out(1);
-        t
-    }
-
-    fn fold_region(&mut self, r: I::Region) -> I::Region {
-        match r.kind() {
-            ty::ReBound(db, _) if self.binder > db => r,
-            _ => Region::new_static(self.interner()),
-        }
+        Const::new_anon_bound(self.interner(), self.binder_index, var)
     }
 }
diff --git a/compiler/rustc_next_trait_solver/src/resolve.rs b/compiler/rustc_next_trait_solver/src/resolve.rs
index 1333b4aa7d8..92e05cc4901 100644
--- a/compiler/rustc_next_trait_solver/src/resolve.rs
+++ b/compiler/rustc_next_trait_solver/src/resolve.rs
@@ -58,8 +58,7 @@ impl<Infcx: InferCtxtLike<Interner = I>, I: Interner> TypeFolder<I> for EagerRes
     fn fold_const(&mut self, c: I::Const) -> I::Const {
         match c.kind() {
             ty::ConstKind::Infer(ty::InferConst::Var(vid)) => {
-                let ty = c.ty().fold_with(self);
-                let resolved = self.infcx.opportunistic_resolve_ct_var(vid, ty);
+                let resolved = self.infcx.opportunistic_resolve_ct_var(vid);
                 if c != resolved && resolved.has_infer() {
                     resolved.fold_with(self)
                 } else {
@@ -67,9 +66,7 @@ impl<Infcx: InferCtxtLike<Interner = I>, I: Interner> TypeFolder<I> for EagerRes
                 }
             }
             ty::ConstKind::Infer(ty::InferConst::EffectVar(vid)) => {
-                let bool = Ty::new_bool(self.infcx.interner());
-                debug_assert_eq!(c.ty(), bool);
-                self.infcx.opportunistic_resolve_effect_var(vid, bool)
+                self.infcx.opportunistic_resolve_effect_var(vid)
             }
             _ => {
                 if c.has_infer() {
diff --git a/compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/encode.rs b/compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/encode.rs
index d67132d2dd4..22224e1cc95 100644
--- a/compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/encode.rs
+++ b/compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/encode.rs
@@ -111,7 +111,8 @@ fn encode_const<'tcx>(
             // L<element-type>E as literal argument
 
             // Element type
-            s.push_str(&encode_ty(tcx, c.ty(), dict, options));
+            // THISPR
+            s.push_str(&encode_ty(tcx, todo!(), dict, options));
         }
 
         // Literal arguments
@@ -119,12 +120,14 @@ fn encode_const<'tcx>(
             // L<element-type>[n]<element-value>E as literal argument
 
             // Element type
-            s.push_str(&encode_ty(tcx, c.ty(), dict, options));
+            // THISPR
+            let ct_ty: Ty<'tcx> = todo!();
+            s.push_str(&encode_ty(tcx, ct_ty, dict, options));
 
             // The only allowed types of const values are bool, u8, u16, u32,
             // u64, u128, usize i8, i16, i32, i64, i128, isize, and char. The
             // bool value false is encoded as 0 and true as 1.
-            match c.ty().kind() {
+            match ct_ty.kind() {
                 ty::Int(ity) => {
                     let bits = c.eval_bits(tcx, ty::ParamEnv::reveal_all());
                     let val = Integer::from_int_ty(&tcx, *ity).size().sign_extend(bits) as i128;
@@ -142,7 +145,7 @@ fn encode_const<'tcx>(
                     let _ = write!(s, "{val}");
                 }
                 _ => {
-                    bug!("encode_const: unexpected type `{:?}`", c.ty());
+                    bug!("encode_const: unexpected type `{:?}`", ct_ty);
                 }
             }
         }
diff --git a/compiler/rustc_smir/src/rustc_smir/convert/ty.rs b/compiler/rustc_smir/src/rustc_smir/convert/ty.rs
index 1f3356f579f..4d60dd73c3c 100644
--- a/compiler/rustc_smir/src/rustc_smir/convert/ty.rs
+++ b/compiler/rustc_smir/src/rustc_smir/convert/ty.rs
@@ -463,7 +463,10 @@ impl<'tcx> Stable<'tcx> for ty::Const<'tcx> {
                         ty::ValTree::Branch(tables.tcx.lift(branch).unwrap())
                     }
                 };
-                let ty = tables.tcx.lift(self.ty()).unwrap();
+
+                // THISPR
+                let ty = todo!();
+                // let ty = tables.tcx.lift(c.ty()).unwrap();
                 let const_val = tables.tcx.valtree_to_const_val((ty, val));
                 if matches!(const_val, mir::ConstValue::ZeroSized) {
                     stable_mir::ty::TyConstKind::ZSTValue(ty.stable(tables))
diff --git a/compiler/rustc_symbol_mangling/src/legacy.rs b/compiler/rustc_symbol_mangling/src/legacy.rs
index 0ed1f67bb82..1fea9b561a2 100644
--- a/compiler/rustc_symbol_mangling/src/legacy.rs
+++ b/compiler/rustc_symbol_mangling/src/legacy.rs
@@ -269,16 +269,21 @@ impl<'tcx> Printer<'tcx> for SymbolPrinter<'tcx> {
     }
 
     fn print_const(&mut self, ct: ty::Const<'tcx>) -> Result<(), PrintError> {
+        // THISPR
+        let ct_ty: Ty<'tcx> = todo!();
+
         // only print integers
-        match (ct.kind(), ct.ty().kind()) {
+        match (ct.kind(), ct_ty.kind()) {
             (ty::ConstKind::Value(ty::ValTree::Leaf(scalar)), ty::Int(_) | ty::Uint(_)) => {
                 // The `pretty_print_const` formatting depends on -Zverbose-internals
                 // flag, so we cannot reuse it here.
-                let signed = matches!(ct.ty().kind(), ty::Int(_));
+                let signed = matches!(ct_ty.kind(), ty::Int(_));
                 write!(
                     self,
                     "{:#?}",
-                    ty::ConstInt::new(scalar, signed, ct.ty().is_ptr_sized_integral())
+                    // THISPR
+                    // ct.ty().is_ptr_sized_integral()
+                    ty::ConstInt::new(scalar, signed, todo!())
                 )?;
             }
             _ => self.write_str("_")?,
diff --git a/compiler/rustc_symbol_mangling/src/v0.rs b/compiler/rustc_symbol_mangling/src/v0.rs
index 57b1542ff5a..bb45fd07bee 100644
--- a/compiler/rustc_symbol_mangling/src/v0.rs
+++ b/compiler/rustc_symbol_mangling/src/v0.rs
@@ -567,7 +567,9 @@ impl<'tcx> Printer<'tcx> for SymbolMangler<'tcx> {
         }
 
         let start = self.out.len();
-        let ty = ct.ty();
+        // THISPR
+        let ty: Ty<'tcx> = todo!();
+        // let ty = ct.ty();
 
         match ty.kind() {
             ty::Uint(_) | ty::Int(_) | ty::Bool | ty::Char => {
@@ -626,12 +628,10 @@ impl<'tcx> Printer<'tcx> for SymbolMangler<'tcx> {
                         }
                     }
                     _ => {
-                        let pointee_ty = ct
-                            .ty()
-                            .builtin_deref(true)
-                            .expect("tried to dereference on non-ptr type");
+                        let pointee_ty =
+                            ty.builtin_deref(true).expect("tried to dereference on non-ptr type");
                         // FIXME(const_generics): add an assert that we only do this for valtrees.
-                        let dereferenced_const = self.tcx.mk_ct_from_kind(ct.kind(), pointee_ty);
+                        let dereferenced_const = self.tcx.mk_ct_from_kind(ct.kind());
                         dereferenced_const.print(self)?;
                     }
                 }
@@ -649,7 +649,7 @@ impl<'tcx> Printer<'tcx> for SymbolMangler<'tcx> {
                     Ok(())
                 };
 
-                match *ct.ty().kind() {
+                match *ty.kind() {
                     ty::Array(..) | ty::Slice(_) => {
                         self.push("A");
                         print_field_list(self)?;
@@ -698,7 +698,7 @@ impl<'tcx> Printer<'tcx> for SymbolMangler<'tcx> {
                 }
             }
             _ => {
-                bug!("symbol_names: unsupported constant of type `{}` ({:?})", ct.ty(), ct);
+                bug!("symbol_names: unsupported constant of type `{}` ({:?})", ty, ct);
             }
         }
 
diff --git a/compiler/rustc_trait_selection/src/solve/eval_ctxt/canonical.rs b/compiler/rustc_trait_selection/src/solve/eval_ctxt/canonical.rs
index 690c1797f23..0e0b9e98339 100644
--- a/compiler/rustc_trait_selection/src/solve/eval_ctxt/canonical.rs
+++ b/compiler/rustc_trait_selection/src/solve/eval_ctxt/canonical.rs
@@ -444,7 +444,7 @@ pub(in crate::solve) fn instantiate_canonical_state<'tcx, T: TypeFoldable<TyCtxt
                 infcx.next_region_var(RegionVariableOrigin::MiscVariable(span)).into()
             }
             ty::GenericArgKind::Type(_) => infcx.next_ty_var(span).into(),
-            ty::GenericArgKind::Const(ct) => infcx.next_const_var(ct.ty(), span).into(),
+            ty::GenericArgKind::Const(_) => infcx.next_const_var(span).into(),
         };
 
         orig_values.push(unconstrained);
diff --git a/compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs b/compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs
index f18f1f4f8f0..eecceaec6a7 100644
--- a/compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs
+++ b/compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs
@@ -609,8 +609,8 @@ impl<'tcx> EvalCtxt<'_, InferCtxt<'tcx>> {
         ty
     }
 
-    pub(super) fn next_const_infer(&mut self, ty: Ty<'tcx>) -> ty::Const<'tcx> {
-        let ct = self.infcx.next_const_var(ty, DUMMY_SP);
+    pub(super) fn next_const_infer(&mut self) -> ty::Const<'tcx> {
+        let ct = self.infcx.next_const_var(DUMMY_SP);
         self.inspect.add_var_value(ct);
         ct
     }
@@ -620,7 +620,7 @@ impl<'tcx> EvalCtxt<'_, InferCtxt<'tcx>> {
     pub(super) fn next_term_infer_of_kind(&mut self, kind: ty::Term<'tcx>) -> ty::Term<'tcx> {
         match kind.unpack() {
             ty::TermKind::Ty(_) => self.next_ty_infer().into(),
-            ty::TermKind::Const(ct) => self.next_const_infer(ct.ty()).into(),
+            ty::TermKind::Const(_) => self.next_const_infer().into(),
         }
     }
 
@@ -1037,14 +1037,14 @@ impl<'tcx> EvalCtxt<'_, InferCtxt<'tcx>> {
         &self,
         param_env: ty::ParamEnv<'tcx>,
         unevaluated: ty::UnevaluatedConst<'tcx>,
-        ty: Ty<'tcx>,
     ) -> Option<ty::Const<'tcx>> {
         use rustc_middle::mir::interpret::ErrorHandled;
         match self.infcx.const_eval_resolve(param_env, unevaluated, DUMMY_SP) {
-            Ok(Some(val)) => Some(ty::Const::new_value(self.interner(), val, ty)),
+            // THISPR
+            Ok(Some(val)) => Some(ty::Const::new_value(self.interner(), val, todo!())),
             Ok(None) | Err(ErrorHandled::TooGeneric(_)) => None,
             Err(ErrorHandled::Reported(e, _)) => {
-                Some(ty::Const::new_error(self.interner(), e.into(), ty))
+                Some(ty::Const::new_error(self.interner(), e.into()))
             }
         }
     }
@@ -1124,7 +1124,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for ReplaceAliasWithInfer<'_, '_, 'tcx> {
     fn fold_const(&mut self, ct: ty::Const<'tcx>) -> ty::Const<'tcx> {
         match ct.kind() {
             ty::ConstKind::Unevaluated(..) if !ct.has_escaping_bound_vars() => {
-                let infer_ct = self.ecx.next_const_infer(ct.ty());
+                let infer_ct = self.ecx.next_const_infer();
                 let normalizes_to = ty::PredicateKind::AliasRelate(
                     ct.into(),
                     infer_ct.into(),
diff --git a/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs b/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs
index 1f27978e5a6..19c95dad48c 100644
--- a/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs
+++ b/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs
@@ -208,7 +208,7 @@ impl<'a, 'tcx> InspectCandidate<'a, 'tcx> {
                 Some(ty::PredicateKind::NormalizesTo(ty::NormalizesTo { alias, term })) => {
                     let unconstrained_term = match term.unpack() {
                         ty::TermKind::Ty(_) => infcx.next_ty_var(span).into(),
-                        ty::TermKind::Const(ct) => infcx.next_const_var(ct.ty(), span).into(),
+                        ty::TermKind::Const(_) => infcx.next_const_var(span).into(),
                     };
                     let goal =
                         goal.with(infcx.tcx, ty::NormalizesTo { alias, term: unconstrained_term });
diff --git a/compiler/rustc_trait_selection/src/solve/mod.rs b/compiler/rustc_trait_selection/src/solve/mod.rs
index 68a4831c335..be5b36c5c8a 100644
--- a/compiler/rustc_trait_selection/src/solve/mod.rs
+++ b/compiler/rustc_trait_selection/src/solve/mod.rs
@@ -169,7 +169,7 @@ impl<'a, 'tcx> EvalCtxt<'a, InferCtxt<'tcx>> {
 
                 // FIXME(generic_const_exprs): Implement handling for generic
                 // const expressions here.
-                if let Some(_normalized) = self.try_const_eval_resolve(param_env, uv, ct.ty()) {
+                if let Some(_normalized) = self.try_const_eval_resolve(param_env, uv) {
                     self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
                 } else {
                     self.evaluate_added_goals_and_make_canonical_response(Certainty::AMBIGUOUS)
@@ -217,7 +217,8 @@ impl<'a, 'tcx> EvalCtxt<'a, InferCtxt<'tcx>> {
                 self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
             }
             _ => {
-                self.eq(goal.param_env, ct.ty(), ty)?;
+                // THISPR
+                self.eq(goal.param_env, todo!(), ty)?;
                 self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
             }
         }
diff --git a/compiler/rustc_trait_selection/src/solve/normalize.rs b/compiler/rustc_trait_selection/src/solve/normalize.rs
index c60d1aed415..f42edebfcc4 100644
--- a/compiler/rustc_trait_selection/src/solve/normalize.rs
+++ b/compiler/rustc_trait_selection/src/solve/normalize.rs
@@ -109,7 +109,6 @@ where
 
     fn normalize_unevaluated_const(
         &mut self,
-        ty: Ty<'tcx>,
         uv: ty::UnevaluatedConst<'tcx>,
     ) -> Result<ty::Const<'tcx>, Vec<E>> {
         let infcx = self.at.infcx;
@@ -126,7 +125,7 @@ where
 
         self.depth += 1;
 
-        let new_infer_ct = infcx.next_const_var(ty, self.at.cause.span);
+        let new_infer_ct = infcx.next_const_var(self.at.cause.span);
         let obligation = Obligation::new(
             tcx,
             self.at.cause.clone(),
@@ -143,7 +142,7 @@ where
             let ct = infcx.resolve_vars_if_possible(new_infer_ct);
             ct.try_fold_with(self)?
         } else {
-            ty::Const::new_unevaluated(tcx, uv, ty).try_super_fold_with(self)?
+            ty::Const::new_unevaluated(tcx, uv).try_super_fold_with(self)?
         };
 
         self.depth -= 1;
@@ -214,7 +213,7 @@ where
         if uv.has_escaping_bound_vars() {
             let (uv, mapped_regions, mapped_types, mapped_consts) =
                 BoundVarReplacer::replace_bound_vars(infcx, &mut self.universes, uv);
-            let result = ensure_sufficient_stack(|| self.normalize_unevaluated_const(ct.ty(), uv))?;
+            let result = ensure_sufficient_stack(|| self.normalize_unevaluated_const(uv))?;
             Ok(PlaceholderReplacer::replace_placeholders(
                 infcx,
                 mapped_regions,
@@ -224,7 +223,7 @@ where
                 result,
             ))
         } else {
-            ensure_sufficient_stack(|| self.normalize_unevaluated_const(ct.ty(), uv))
+            ensure_sufficient_stack(|| self.normalize_unevaluated_const(uv))
         }
     }
 }
diff --git a/compiler/rustc_trait_selection/src/solve/normalizes_to/anon_const.rs b/compiler/rustc_trait_selection/src/solve/normalizes_to/anon_const.rs
index 362c4072278..a6e4b6ff4a8 100644
--- a/compiler/rustc_trait_selection/src/solve/normalizes_to/anon_const.rs
+++ b/compiler/rustc_trait_selection/src/solve/normalizes_to/anon_const.rs
@@ -12,10 +12,6 @@ impl<'tcx> EvalCtxt<'_, InferCtxt<'tcx>> {
         if let Some(normalized_const) = self.try_const_eval_resolve(
             goal.param_env,
             ty::UnevaluatedConst::new(goal.predicate.alias.def_id, goal.predicate.alias.args),
-            self.interner()
-                .type_of(goal.predicate.alias.def_id)
-                .no_bound_vars()
-                .expect("const ty should not rely on other generics"),
         ) {
             self.instantiate_normalizes_to_term(goal, normalized_const.into());
             self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
diff --git a/compiler/rustc_trait_selection/src/solve/normalizes_to/mod.rs b/compiler/rustc_trait_selection/src/solve/normalizes_to/mod.rs
index 8c63bd824bc..787f08a084e 100644
--- a/compiler/rustc_trait_selection/src/solve/normalizes_to/mod.rs
+++ b/compiler/rustc_trait_selection/src/solve/normalizes_to/mod.rs
@@ -201,13 +201,7 @@ impl<'tcx> assembly::GoalKind<'tcx> for NormalizesTo<'tcx> {
             let error_response = |ecx: &mut EvalCtxt<'_, InferCtxt<'tcx>>, reason| {
                 let guar = tcx.dcx().span_delayed_bug(tcx.def_span(assoc_def.item.def_id), reason);
                 let error_term = match assoc_def.item.kind {
-                    ty::AssocKind::Const => ty::Const::new_error(
-                        tcx,
-                        guar,
-                        tcx.type_of(goal.predicate.def_id())
-                            .instantiate(tcx, goal.predicate.alias.args),
-                    )
-                    .into(),
+                    ty::AssocKind::Const => ty::Const::new_error(tcx, guar).into(),
                     ty::AssocKind::Type => Ty::new_error(tcx, guar).into(),
                     // This makes no sense...
                     ty::AssocKind::Fn => span_bug!(
@@ -253,7 +247,6 @@ impl<'tcx> assembly::GoalKind<'tcx> for NormalizesTo<'tcx> {
                         ty::EarlyBinder::bind(
                             ty::Const::new_error_with_message(
                                 tcx,
-                                tcx.type_of(assoc_def.item.def_id).instantiate_identity(),
                                 DUMMY_SP,
                                 "associated const projection is not supported yet",
                             )
diff --git a/compiler/rustc_trait_selection/src/traits/auto_trait.rs b/compiler/rustc_trait_selection/src/traits/auto_trait.rs
index 6623a86e69f..c3a25a50c7f 100644
--- a/compiler/rustc_trait_selection/src/traits/auto_trait.rs
+++ b/compiler/rustc_trait_selection/src/traits/auto_trait.rs
@@ -765,7 +765,8 @@ impl<'tcx> AutoTraitFinder<'tcx> {
                                 unevaluated,
                                 obligation.cause.span,
                             ) {
-                                Ok(Some(valtree)) => Ok(ty::Const::new_value(selcx.tcx(),valtree, c.ty())),
+                                // THISPR
+                                Ok(Some(valtree)) => Ok(ty::Const::new_value(selcx.tcx(),valtree, todo!())),
                                 Ok(None) => {
                                     let tcx = self.tcx;
                                     let reported =
diff --git a/compiler/rustc_trait_selection/src/traits/coherence.rs b/compiler/rustc_trait_selection/src/traits/coherence.rs
index 7723f2229bf..7120a061e5b 100644
--- a/compiler/rustc_trait_selection/src/traits/coherence.rs
+++ b/compiler/rustc_trait_selection/src/traits/coherence.rs
@@ -529,7 +529,6 @@ fn plug_infer_with_placeholders<'tcx>(
                         ty::Const::new_placeholder(
                             self.infcx.tcx,
                             ty::Placeholder { universe: self.universe, bound: self.next_var() },
-                            ct.ty(),
                         ),
                     )
                 else {
diff --git a/compiler/rustc_trait_selection/src/traits/const_evaluatable.rs b/compiler/rustc_trait_selection/src/traits/const_evaluatable.rs
index 8348482386f..7d9771af5af 100644
--- a/compiler/rustc_trait_selection/src/traits/const_evaluatable.rs
+++ b/compiler/rustc_trait_selection/src/traits/const_evaluatable.rs
@@ -173,8 +173,7 @@ fn satisfied_from_param_env<'tcx>(
             debug!("is_const_evaluatable: candidate={:?}", c);
             if self.infcx.probe(|_| {
                 let ocx = ObligationCtxt::new(self.infcx);
-                ocx.eq(&ObligationCause::dummy(), self.param_env, c.ty(), self.ct.ty()).is_ok()
-                    && ocx.eq(&ObligationCause::dummy(), self.param_env, c, self.ct).is_ok()
+                ocx.eq(&ObligationCause::dummy(), self.param_env, c, self.ct).is_ok()
                     && ocx.select_all_or_error().is_empty()
             }) {
                 self.single_match = match self.single_match {
@@ -215,7 +214,6 @@ fn satisfied_from_param_env<'tcx>(
 
     if let Some(Ok(c)) = single_match {
         let ocx = ObligationCtxt::new(infcx);
-        assert!(ocx.eq(&ObligationCause::dummy(), param_env, c.ty(), ct.ty()).is_ok());
         assert!(ocx.eq(&ObligationCause::dummy(), param_env, c, ct).is_ok());
         assert!(ocx.select_all_or_error().is_empty());
         return true;
diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs
index 9a0929baeaf..416b62226cd 100644
--- a/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs
+++ b/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs
@@ -920,7 +920,8 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
                             &obligation.cause,
                             None,
                             None,
-                            TypeError::Sorts(ty::error::ExpectedFound::new(true, ty, ct.ty())),
+                            // THISPR
+                            TypeError::Sorts(ty::error::ExpectedFound::new(true, ty, todo!())),
                             false,
                             false,
                         );
diff --git a/compiler/rustc_trait_selection/src/traits/fulfill.rs b/compiler/rustc_trait_selection/src/traits/fulfill.rs
index a26288efc96..277b52e274b 100644
--- a/compiler/rustc_trait_selection/src/traits/fulfill.rs
+++ b/compiler/rustc_trait_selection/src/traits/fulfill.rs
@@ -459,7 +459,8 @@ impl<'a, 'tcx> ObligationProcessor for FulfillProcessor<'a, 'tcx> {
                             match self.selcx.infcx.at(&obligation.cause, obligation.param_env).eq(
                                 // Only really excercised by generic_const_exprs
                                 DefineOpaqueTypes::Yes,
-                                ct.ty(),
+                                // THISPR
+                                todo!(),
                                 ty,
                             ) {
                                 Ok(inf_ok) => {
@@ -633,7 +634,6 @@ impl<'a, 'tcx> ObligationProcessor for FulfillProcessor<'a, 'tcx> {
                             match self.selcx.infcx.try_const_eval_resolve(
                                 obligation.param_env,
                                 unevaluated,
-                                c.ty(),
                                 obligation.cause.span,
                             ) {
                                 Ok(val) => Ok(val),
diff --git a/compiler/rustc_trait_selection/src/traits/mod.rs b/compiler/rustc_trait_selection/src/traits/mod.rs
index d918945dbed..7be2c4a85c5 100644
--- a/compiler/rustc_trait_selection/src/traits/mod.rs
+++ b/compiler/rustc_trait_selection/src/traits/mod.rs
@@ -359,7 +359,7 @@ pub fn normalize_param_env_or_error<'tcx>(
                     // `ty::Const::normalize` can only work with properly preserved binders.
 
                     if c.has_escaping_bound_vars() {
-                        return ty::Const::new_misc_error(self.0, c.ty());
+                        return ty::Const::new_misc_error(self.0);
                     }
                     // While it is pretty sus to be evaluating things with an empty param env, it
                     // should actually be okay since without `feature(generic_const_exprs)` the only
diff --git a/compiler/rustc_trait_selection/src/traits/project.rs b/compiler/rustc_trait_selection/src/traits/project.rs
index 501d9c9266e..2c9cb79664b 100644
--- a/compiler/rustc_trait_selection/src/traits/project.rs
+++ b/compiler/rustc_trait_selection/src/traits/project.rs
@@ -523,16 +523,9 @@ fn normalize_to_error<'a, 'tcx>(
         | ty::AliasTermKind::InherentTy
         | ty::AliasTermKind::OpaqueTy
         | ty::AliasTermKind::WeakTy => selcx.infcx.next_ty_var(cause.span).into(),
-        ty::AliasTermKind::UnevaluatedConst | ty::AliasTermKind::ProjectionConst => selcx
-            .infcx
-            .next_const_var(
-                selcx
-                    .tcx()
-                    .type_of(projection_term.def_id)
-                    .instantiate(selcx.tcx(), projection_term.args),
-                cause.span,
-            )
-            .into(),
+        ty::AliasTermKind::UnevaluatedConst | ty::AliasTermKind::ProjectionConst => {
+            selcx.infcx.next_const_var(cause.span).into()
+        }
     };
     let trait_obligation = Obligation {
         cause,
@@ -744,8 +737,6 @@ fn project<'cx, 'tcx>(
                         obligation.predicate.def_id,
                         obligation.predicate.args,
                     ),
-                    tcx.type_of(obligation.predicate.def_id)
-                        .instantiate(tcx, obligation.predicate.args),
                 )
                 .into(),
                 kind => {
@@ -2071,15 +2062,14 @@ fn confirm_impl_candidate<'cx, 'tcx>(
     // * `args` ends up as `[u32, S]`
     let args = obligation.predicate.args.rebase_onto(tcx, trait_def_id, args);
     let args = translate_args(selcx.infcx, param_env, impl_def_id, args, assoc_ty.defining_node);
-    let ty = tcx.type_of(assoc_ty.item.def_id);
     let is_const = matches!(tcx.def_kind(assoc_ty.item.def_id), DefKind::AssocConst);
     let term: ty::EarlyBinder<'tcx, ty::Term<'tcx>> = if is_const {
         let did = assoc_ty.item.def_id;
         let identity_args = crate::traits::GenericArgs::identity_for_item(tcx, did);
         let uv = ty::UnevaluatedConst::new(did, identity_args);
-        ty.map_bound(|ty| ty::Const::new_unevaluated(tcx, uv, ty).into())
+        ty::EarlyBinder::bind(ty::Const::new_unevaluated(tcx, uv).into())
     } else {
-        ty.map_bound(|ty| ty.into())
+        tcx.type_of(assoc_ty.item.def_id).map_bound(|ty| ty.into())
     };
     if !tcx.check_args_compatible(assoc_ty.item.def_id, args) {
         let err = Ty::new_error_with_message(
diff --git a/compiler/rustc_trait_selection/src/traits/select/confirmation.rs b/compiler/rustc_trait_selection/src/traits/select/confirmation.rs
index ef0d8735d35..749081006f3 100644
--- a/compiler/rustc_trait_selection/src/traits/select/confirmation.rs
+++ b/compiler/rustc_trait_selection/src/traits/select/confirmation.rs
@@ -665,9 +665,6 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
                                 tcx,
                                 ty::INNERMOST,
                                 ty::BoundVar::from_usize(bound_vars.len() - 1),
-                                tcx.type_of(param.def_id)
-                                    .no_bound_vars()
-                                    .expect("const parameter types cannot be generic"),
                             )
                             .into()
                         }
diff --git a/compiler/rustc_trait_selection/src/traits/select/mod.rs b/compiler/rustc_trait_selection/src/traits/select/mod.rs
index 2489b8916d1..93e6cbdf69a 100644
--- a/compiler/rustc_trait_selection/src/traits/select/mod.rs
+++ b/compiler/rustc_trait_selection/src/traits/select/mod.rs
@@ -947,7 +947,6 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
                             match self.infcx.try_const_eval_resolve(
                                 obligation.param_env,
                                 unevaluated,
-                                c.ty(),
                                 obligation.cause.span,
                             ) {
                                 Ok(val) => Ok(val),
@@ -1009,7 +1008,9 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
                             return Ok(EvaluatedToAmbig);
                         }
                         ty::ConstKind::Error(_) => return Ok(EvaluatedToOk),
-                        _ => ct.ty(),
+                        // THISPR
+                        _ => todo!(),
+                        // _ => ct.ty(),
                     };
 
                     match self.infcx.at(&obligation.cause, obligation.param_env).eq(
diff --git a/compiler/rustc_trait_selection/src/traits/util.rs b/compiler/rustc_trait_selection/src/traits/util.rs
index 5d5a22e189c..960c27b636e 100644
--- a/compiler/rustc_trait_selection/src/traits/util.rs
+++ b/compiler/rustc_trait_selection/src/traits/util.rs
@@ -483,7 +483,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for BoundVarReplacer<'_, 'tcx> {
                 let universe = self.universe_for(debruijn);
                 let p = ty::PlaceholderConst { universe, bound: bound_const };
                 self.mapped_consts.insert(p, bound_const);
-                ty::Const::new_placeholder(self.infcx.tcx, p, ct.ty())
+                ty::Const::new_placeholder(self.infcx.tcx, p)
             }
             _ => ct.super_fold_with(self),
         }
@@ -626,7 +626,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for PlaceholderReplacer<'_, 'tcx> {
                     let db = ty::DebruijnIndex::from_usize(
                         self.universe_indices.len() - index + self.current_index.as_usize() - 1,
                     );
-                    ty::Const::new_bound(self.infcx.tcx, db, *replace_var, ct.ty())
+                    ty::Const::new_bound(self.infcx.tcx, db, *replace_var)
                 }
                 None => {
                     if ct.has_infer() {
diff --git a/compiler/rustc_transmute/src/lib.rs b/compiler/rustc_transmute/src/lib.rs
index 8d7d81d8f73..ccbcfed056f 100644
--- a/compiler/rustc_transmute/src/lib.rs
+++ b/compiler/rustc_transmute/src/lib.rs
@@ -144,7 +144,8 @@ mod rustc {
                 });
             };
 
-            let adt_def = c.ty().ty_adt_def()?;
+            let assume_def_id = tcx.get_lang_items(()).get(LangItem::TransmuteOpts)?;
+            let adt_def = tcx.adt_def(assume_def_id);
 
             assert_eq!(
                 tcx.require_lang_item(LangItem::TransmuteOpts, None),
diff --git a/compiler/rustc_ty_utils/src/consts.rs b/compiler/rustc_ty_utils/src/consts.rs
index 8a42298f216..b403e063d40 100644
--- a/compiler/rustc_ty_utils/src/consts.rs
+++ b/compiler/rustc_ty_utils/src/consts.rs
@@ -32,7 +32,10 @@ fn destructure_const<'tcx>(
         _ => bug!("cannot destructure constant {:?}", const_),
     };
 
-    let (fields, variant) = match const_.ty().kind() {
+    // THISPR
+    let ct_ty: Ty<'tcx> = todo!();
+
+    let (fields, variant) = match ct_ty.kind() {
         ty::Array(inner_ty, _) | ty::Slice(inner_ty) => {
             // construct the consts for the elements of the array/slice
             let field_consts = branches
@@ -121,7 +124,7 @@ fn recurse_build<'tcx>(
             let sp = node.span;
             match tcx.at(sp).lit_to_const(LitToConstInput { lit: &lit.node, ty: node.ty, neg }) {
                 Ok(c) => c,
-                Err(LitToConstError::Reported(guar)) => ty::Const::new_error(tcx, guar, node.ty),
+                Err(LitToConstError::Reported(guar)) => ty::Const::new_error(tcx, guar),
                 Err(LitToConstError::TypeError) => {
                     bug!("encountered type error in lit_to_const")
                 }
@@ -137,35 +140,31 @@ fn recurse_build<'tcx>(
         }
         &ExprKind::NamedConst { def_id, args, user_ty: _ } => {
             let uneval = ty::UnevaluatedConst::new(def_id, args);
-            ty::Const::new_unevaluated(tcx, uneval, node.ty)
+            ty::Const::new_unevaluated(tcx, uneval)
         }
-        ExprKind::ConstParam { param, .. } => ty::Const::new_param(tcx, *param, node.ty),
+        ExprKind::ConstParam { param, .. } => ty::Const::new_param(tcx, *param),
 
         ExprKind::Call { fun, args, .. } => {
+            let fun_ty = body.exprs[*fun].ty;
             let fun = recurse_build(tcx, body, *fun, root_span)?;
 
             let mut new_args = Vec::<ty::Const<'tcx>>::with_capacity(args.len());
             for &id in args.iter() {
                 new_args.push(recurse_build(tcx, body, id, root_span)?);
             }
-            ty::Const::new_expr(
-                tcx,
-                Expr::new_call(tcx, fun.ty(), fun, new_args.into_iter()),
-                node.ty,
-            )
+            ty::Const::new_expr(tcx, Expr::new_call(tcx, fun_ty, fun, new_args.into_iter()))
         }
         &ExprKind::Binary { op, lhs, rhs } if check_binop(op) => {
+            let lhs_ty = body.exprs[lhs].ty;
             let lhs = recurse_build(tcx, body, lhs, root_span)?;
+            let rhs_ty = body.exprs[rhs].ty;
             let rhs = recurse_build(tcx, body, rhs, root_span)?;
-            ty::Const::new_expr(
-                tcx,
-                Expr::new_binop(tcx, op, lhs.ty(), rhs.ty(), lhs, rhs),
-                node.ty,
-            )
+            ty::Const::new_expr(tcx, Expr::new_binop(tcx, op, lhs_ty, rhs_ty, lhs, rhs))
         }
         &ExprKind::Unary { op, arg } if check_unop(op) => {
+            let arg_ty = body.exprs[arg].ty;
             let arg = recurse_build(tcx, body, arg, root_span)?;
-            ty::Const::new_expr(tcx, Expr::new_unop(tcx, op, arg.ty(), arg), node.ty)
+            ty::Const::new_expr(tcx, Expr::new_unop(tcx, op, arg_ty, arg))
         }
         // This is necessary so that the following compiles:
         //
@@ -187,20 +186,12 @@ fn recurse_build<'tcx>(
         &ExprKind::Use { source } => {
             let value_ty = body.exprs[source].ty;
             let value = recurse_build(tcx, body, source, root_span)?;
-            ty::Const::new_expr(
-                tcx,
-                Expr::new_cast(tcx, CastKind::Use, value_ty, value, node.ty),
-                node.ty,
-            )
+            ty::Const::new_expr(tcx, Expr::new_cast(tcx, CastKind::Use, value_ty, value, node.ty))
         }
         &ExprKind::Cast { source } => {
             let value_ty = body.exprs[source].ty;
             let value = recurse_build(tcx, body, source, root_span)?;
-            ty::Const::new_expr(
-                tcx,
-                Expr::new_cast(tcx, CastKind::As, value_ty, value, node.ty),
-                node.ty,
-            )
+            ty::Const::new_expr(tcx, Expr::new_cast(tcx, CastKind::As, value_ty, value, node.ty))
         }
         ExprKind::Borrow { arg, .. } => {
             let arg_node = &body.exprs[*arg];
diff --git a/compiler/rustc_type_ir/src/canonical.rs b/compiler/rustc_type_ir/src/canonical.rs
index 1c30f03c693..61ae36265ec 100644
--- a/compiler/rustc_type_ir/src/canonical.rs
+++ b/compiler/rustc_type_ir/src/canonical.rs
@@ -115,8 +115,8 @@ impl<I: Interner> CanonicalVarInfo<I> {
             CanonicalVarKind::PlaceholderTy(_) => false,
             CanonicalVarKind::Region(_) => true,
             CanonicalVarKind::PlaceholderRegion(..) => false,
-            CanonicalVarKind::Const(..) => true,
-            CanonicalVarKind::PlaceholderConst(_, _) => false,
+            CanonicalVarKind::Const(_) => true,
+            CanonicalVarKind::PlaceholderConst(_) => false,
             CanonicalVarKind::Effect => true,
         }
     }
@@ -126,8 +126,8 @@ impl<I: Interner> CanonicalVarInfo<I> {
             CanonicalVarKind::Region(_) | CanonicalVarKind::PlaceholderRegion(_) => true,
             CanonicalVarKind::Ty(_)
             | CanonicalVarKind::PlaceholderTy(_)
-            | CanonicalVarKind::Const(_, _)
-            | CanonicalVarKind::PlaceholderConst(_, _)
+            | CanonicalVarKind::Const(_)
+            | CanonicalVarKind::PlaceholderConst(_)
             | CanonicalVarKind::Effect => false,
         }
     }
@@ -136,12 +136,12 @@ impl<I: Interner> CanonicalVarInfo<I> {
         match self.kind {
             CanonicalVarKind::Ty(_)
             | CanonicalVarKind::Region(_)
-            | CanonicalVarKind::Const(_, _)
+            | CanonicalVarKind::Const(_)
             | CanonicalVarKind::Effect => panic!("expected placeholder: {self:?}"),
 
             CanonicalVarKind::PlaceholderRegion(placeholder) => placeholder.var().as_usize(),
             CanonicalVarKind::PlaceholderTy(placeholder) => placeholder.var().as_usize(),
-            CanonicalVarKind::PlaceholderConst(placeholder, _) => placeholder.var().as_usize(),
+            CanonicalVarKind::PlaceholderConst(placeholder) => placeholder.var().as_usize(),
         }
     }
 }
@@ -169,13 +169,13 @@ pub enum CanonicalVarKind<I: Interner> {
     PlaceholderRegion(I::PlaceholderRegion),
 
     /// Some kind of const inference variable.
-    Const(UniverseIndex, I::Ty),
+    Const(UniverseIndex),
 
     /// Effect variable `'?E`.
     Effect,
 
     /// A "placeholder" that represents "any const".
-    PlaceholderConst(I::PlaceholderConst, I::Ty),
+    PlaceholderConst(I::PlaceholderConst),
 }
 
 impl<I: Interner> PartialEq for CanonicalVarKind<I> {
@@ -185,10 +185,8 @@ impl<I: Interner> PartialEq for CanonicalVarKind<I> {
             (Self::PlaceholderTy(l0), Self::PlaceholderTy(r0)) => l0 == r0,
             (Self::Region(l0), Self::Region(r0)) => l0 == r0,
             (Self::PlaceholderRegion(l0), Self::PlaceholderRegion(r0)) => l0 == r0,
-            (Self::Const(l0, l1), Self::Const(r0, r1)) => l0 == r0 && l1 == r1,
-            (Self::PlaceholderConst(l0, l1), Self::PlaceholderConst(r0, r1)) => {
-                l0 == r0 && l1 == r1
-            }
+            (Self::Const(l0), Self::Const(r0)) => l0 == r0,
+            (Self::PlaceholderConst(l0), Self::PlaceholderConst(r0)) => l0 == r0,
             _ => std::mem::discriminant(self) == std::mem::discriminant(other),
         }
     }
@@ -199,10 +197,10 @@ impl<I: Interner> CanonicalVarKind<I> {
         match self {
             CanonicalVarKind::Ty(CanonicalTyVarKind::General(ui)) => ui,
             CanonicalVarKind::Region(ui) => ui,
-            CanonicalVarKind::Const(ui, _) => ui,
+            CanonicalVarKind::Const(ui) => ui,
             CanonicalVarKind::PlaceholderTy(placeholder) => placeholder.universe(),
             CanonicalVarKind::PlaceholderRegion(placeholder) => placeholder.universe(),
-            CanonicalVarKind::PlaceholderConst(placeholder, _) => placeholder.universe(),
+            CanonicalVarKind::PlaceholderConst(placeholder) => placeholder.universe(),
             CanonicalVarKind::Ty(CanonicalTyVarKind::Float | CanonicalTyVarKind::Int) => {
                 UniverseIndex::ROOT
             }
@@ -220,7 +218,7 @@ impl<I: Interner> CanonicalVarKind<I> {
                 CanonicalVarKind::Ty(CanonicalTyVarKind::General(ui))
             }
             CanonicalVarKind::Region(_) => CanonicalVarKind::Region(ui),
-            CanonicalVarKind::Const(_, ty) => CanonicalVarKind::Const(ui, ty),
+            CanonicalVarKind::Const(_) => CanonicalVarKind::Const(ui),
 
             CanonicalVarKind::PlaceholderTy(placeholder) => {
                 CanonicalVarKind::PlaceholderTy(placeholder.with_updated_universe(ui))
@@ -228,8 +226,8 @@ impl<I: Interner> CanonicalVarKind<I> {
             CanonicalVarKind::PlaceholderRegion(placeholder) => {
                 CanonicalVarKind::PlaceholderRegion(placeholder.with_updated_universe(ui))
             }
-            CanonicalVarKind::PlaceholderConst(placeholder, ty) => {
-                CanonicalVarKind::PlaceholderConst(placeholder.with_updated_universe(ui), ty)
+            CanonicalVarKind::PlaceholderConst(placeholder) => {
+                CanonicalVarKind::PlaceholderConst(placeholder.with_updated_universe(ui))
             }
             CanonicalVarKind::Ty(CanonicalTyVarKind::Int | CanonicalTyVarKind::Float)
             | CanonicalVarKind::Effect => {
@@ -345,21 +343,14 @@ impl<I: Interner> CanonicalVarValues<I> {
                             Region::new_anon_bound(tcx, ty::INNERMOST, ty::BoundVar::from_usize(i))
                                 .into()
                         }
-                        CanonicalVarKind::Effect => Const::new_anon_bound(
-                            tcx,
-                            ty::INNERMOST,
-                            ty::BoundVar::from_usize(i),
-                            Ty::new_bool(tcx),
-                        )
-                        .into(),
-                        CanonicalVarKind::Const(_, ty)
-                        | CanonicalVarKind::PlaceholderConst(_, ty) => Const::new_anon_bound(
-                            tcx,
-                            ty::INNERMOST,
-                            ty::BoundVar::from_usize(i),
-                            ty,
-                        )
-                        .into(),
+                        CanonicalVarKind::Effect => {
+                            Const::new_anon_bound(tcx, ty::INNERMOST, ty::BoundVar::from_usize(i))
+                                .into()
+                        }
+                        CanonicalVarKind::Const(_) | CanonicalVarKind::PlaceholderConst(_) => {
+                            Const::new_anon_bound(tcx, ty::INNERMOST, ty::BoundVar::from_usize(i))
+                                .into()
+                        }
                     }
                 },
             )),
diff --git a/compiler/rustc_type_ir/src/debug.rs b/compiler/rustc_type_ir/src/debug.rs
index 4e8be1ee4c2..c206f3ccdb5 100644
--- a/compiler/rustc_type_ir/src/debug.rs
+++ b/compiler/rustc_type_ir/src/debug.rs
@@ -38,11 +38,11 @@ impl<I: Interner> InferCtxtLike for NoInfcx<I> {
         panic!("cannot resolve {vid:?}")
     }
 
-    fn opportunistic_resolve_ct_var(&self, vid: ConstVid, _: I::Ty) -> I::Const {
+    fn opportunistic_resolve_ct_var(&self, vid: ConstVid) -> I::Const {
         panic!("cannot resolve {vid:?}")
     }
 
-    fn opportunistic_resolve_effect_var(&self, vid: EffectVid, _: I::Ty) -> I::Const {
+    fn opportunistic_resolve_effect_var(&self, vid: EffectVid) -> I::Const {
         panic!("cannot resolve {vid:?}")
     }
 
diff --git a/compiler/rustc_type_ir/src/fold.rs b/compiler/rustc_type_ir/src/fold.rs
index 501311ff72f..ee3e5ce66d0 100644
--- a/compiler/rustc_type_ir/src/fold.rs
+++ b/compiler/rustc_type_ir/src/fold.rs
@@ -387,7 +387,7 @@ impl<I: Interner> TypeFolder<I> for Shifter<I> {
         match ct.kind() {
             ty::ConstKind::Bound(debruijn, bound_ct) if debruijn >= self.current_index => {
                 let debruijn = debruijn.shifted_in(self.amount);
-                Const::new_bound(self.tcx, debruijn, bound_ct, ct.ty())
+                Const::new_bound(self.tcx, debruijn, bound_ct)
             }
             _ => ct.super_fold_with(self),
         }
diff --git a/compiler/rustc_type_ir/src/infcx.rs b/compiler/rustc_type_ir/src/infcx.rs
index bb5081fb335..24e10722448 100644
--- a/compiler/rustc_type_ir/src/infcx.rs
+++ b/compiler/rustc_type_ir/src/infcx.rs
@@ -12,15 +12,10 @@ pub trait InferCtxtLike {
     fn opportunistic_resolve_ty_var(&self, vid: TyVid) -> <Self::Interner as Interner>::Ty;
     fn opportunistic_resolve_int_var(&self, vid: IntVid) -> <Self::Interner as Interner>::Ty;
     fn opportunistic_resolve_float_var(&self, vid: FloatVid) -> <Self::Interner as Interner>::Ty;
-    fn opportunistic_resolve_ct_var(
-        &self,
-        vid: ConstVid,
-        ty: <Self::Interner as Interner>::Ty,
-    ) -> <Self::Interner as Interner>::Const;
+    fn opportunistic_resolve_ct_var(&self, vid: ConstVid) -> <Self::Interner as Interner>::Const;
     fn opportunistic_resolve_effect_var(
         &self,
         vid: EffectVid,
-        ty: <Self::Interner as Interner>::Ty,
     ) -> <Self::Interner as Interner>::Const;
     fn opportunistic_resolve_lt_var(&self, vid: RegionVid) -> <Self::Interner as Interner>::Region;
 
diff --git a/compiler/rustc_type_ir/src/inherent.rs b/compiler/rustc_type_ir/src/inherent.rs
index f305ed9b5d7..94874a6acfc 100644
--- a/compiler/rustc_type_ir/src/inherent.rs
+++ b/compiler/rustc_type_ir/src/inherent.rs
@@ -104,22 +104,15 @@ pub trait Const<I: Interner<Const = Self>>:
     + TypeSuperFoldable<I>
     + Flags
 {
-    fn new_infer(interner: I, var: ty::InferConst, ty: I::Ty) -> Self;
+    fn new_infer(interner: I, var: ty::InferConst) -> Self;
 
-    fn new_var(interner: I, var: ty::ConstVid, ty: I::Ty) -> Self;
+    fn new_var(interner: I, var: ty::ConstVid) -> Self;
 
-    fn new_bound(interner: I, debruijn: ty::DebruijnIndex, var: I::BoundConst, ty: I::Ty) -> Self;
+    fn new_bound(interner: I, debruijn: ty::DebruijnIndex, var: I::BoundConst) -> Self;
 
-    fn new_anon_bound(
-        interner: I,
-        debruijn: ty::DebruijnIndex,
-        var: ty::BoundVar,
-        ty: I::Ty,
-    ) -> Self;
-
-    fn new_unevaluated(interner: I, uv: ty::UnevaluatedConst<I>, ty: I::Ty) -> Self;
+    fn new_anon_bound(interner: I, debruijn: ty::DebruijnIndex, var: ty::BoundVar) -> Self;
 
-    fn ty(self) -> I::Ty;
+    fn new_unevaluated(interner: I, uv: ty::UnevaluatedConst<I>) -> Self;
 }
 
 pub trait GenericsOf<I: Interner<GenericsOf = Self>> {
diff --git a/compiler/rustc_type_ir/src/predicate.rs b/compiler/rustc_type_ir/src/predicate.rs
index e7039583c91..9e0e52cfb4b 100644
--- a/compiler/rustc_type_ir/src/predicate.rs
+++ b/compiler/rustc_type_ir/src/predicate.rs
@@ -567,7 +567,6 @@ impl<I: Interner> AliasTerm<I> {
                 I::Const::new_unevaluated(
                     interner,
                     ty::UnevaluatedConst::new(self.def_id, self.args),
-                    interner.type_of(self.def_id).instantiate(interner, &self.args),
                 )
                 .into()
             }