Move NormalizesTo back down

I tried to rebase this down into the first commit but it is WAY too
annoying x

Cargo.lock

@@ -4775,11 +4775,13 @@ dependencies = [
  "rustc_next_trait_solver",
  "rustc_parse_format",
  "rustc_query_system",
+ "rustc_serialize",
  "rustc_session",
  "rustc_span",
  "rustc_target",
  "rustc_transmute",
  "rustc_type_ir",
+ "rustc_type_ir_macros",
  "smallvec",
  "tracing",
 ]

compiler/rustc_trait_selection/Cargo.toml

@@ -22,11 +22,13 @@ rustc_middle = { path = "../rustc_middle" }
 rustc_next_trait_solver = { path = "../rustc_next_trait_solver" }
 rustc_parse_format = { path = "../rustc_parse_format" }
 rustc_query_system = { path = "../rustc_query_system" }
+rustc_serialize = { path = "../rustc_serialize" }
 rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
 rustc_transmute = { path = "../rustc_transmute", features = ["rustc"] }
 rustc_type_ir = { path = "../rustc_type_ir" }
+rustc_type_ir_macros = { path = "../rustc_type_ir_macros" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
 tracing = "0.1"
 # tidy-alphabetical-end

compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs

@@ -11,11 +11,11 @@
 use rustc_infer::traits::query::NoSolution;
 use rustc_infer::traits::solve::{MaybeCause, NestedNormalizationGoals};
 use rustc_infer::traits::ObligationCause;
-use rustc_macros::{extension, HashStable};
+use rustc_macros::{extension, HashStable, HashStable_NoContext, TyDecodable, TyEncodable};
 use rustc_middle::bug;
 use rustc_middle::infer::canonical::CanonicalVarInfos;
 use rustc_middle::traits::solve::{
-    inspect, CanonicalInput, CanonicalResponse, Certainty, NestedGoals, PredefinedOpaques,
+    inspect, CanonicalInput, CanonicalResponse, Certainty, PredefinedOpaques,
     PredefinedOpaquesData, QueryResult,
 };
 use rustc_middle::traits::specialization_graph;
@@ -25,6 +25,8 @@
 };
 use rustc_session::config::DumpSolverProofTree;
 use rustc_span::DUMMY_SP;
+use rustc_type_ir::{self as ir, Interner};
+use rustc_type_ir_macros::{Lift_Generic, TypeFoldable_Generic, TypeVisitable_Generic};
 
 use crate::traits::coherence;
 use crate::traits::vtable::{count_own_vtable_entries, prepare_vtable_segments, VtblSegment};
@@ -101,7 +103,7 @@ pub struct EvalCtxt<'a, 'tcx> {
 #[derive(derivative::Derivative)]
 #[derivative(Clone(bound = ""), Debug(bound = ""), Default(bound = ""))]
 #[derive(TypeVisitable_Generic, TypeFoldable_Generic, Lift_Generic)]
-#[cfg_attr(feature = "nightly", derive(TyDecodable, TyEncodable, HashStable_NoContext))]
+#[derive(TyDecodable, TyEncodable, HashStable_NoContext)]
 // FIXME: This can be made crate-private once `EvalCtxt` also lives in this crate.
 pub struct NestedGoals<I: Interner> {
     /// These normalizes-to goals are treated specially during the evaluation
@@ -114,9 +116,9 @@ pub struct NestedGoals<I: Interner> {
     ///
     /// Forgetting to replace the RHS with a fresh inference variable when we evaluate
     /// this goal results in an ICE..
-    pub normalizes_to_goals: Vec<Goal<I, NormalizesTo<I>>>,
+    pub normalizes_to_goals: Vec<ir::solve::Goal<I, ir::NormalizesTo<I>>>,
     /// The rest of the goals which have not yet processed or remain ambiguous.
-    pub goals: Vec<(GoalSource, Goal<I, I::Predicate>)>,
+    pub goals: Vec<(GoalSource, ir::solve::Goal<I, I::Predicate>)>,
 }
 
 impl<I: Interner> NestedGoals<I> {

compiler/rustc_type_ir/src/solve.rs

@@ -7,7 +7,7 @@
 use rustc_macros::{HashStable_NoContext, TyDecodable, TyEncodable};
 use rustc_type_ir_macros::{Lift_Generic, TypeFoldable_Generic, TypeVisitable_Generic};
 
-use crate::{Canonical, CanonicalVarValues, Interner, NormalizesTo, Upcast};
+use crate::{Canonical, CanonicalVarValues, Interner, Upcast};
 
 pub type CanonicalInput<I, T = <I as Interner>::Predicate> = Canonical<I, QueryInput<I, T>>;
 pub type CanonicalResponse<I> = Canonical<I, Response<I>>;