From 89f3651402d825d46d5aa974839b82ec0b737fe8 Mon Sep 17 00:00:00 2001
From: Michael Goulet <michael@errs.io>
Date: Tue, 28 May 2024 11:38:58 -0400
Subject: Get rid of manual Trace calls

---
 compiler/rustc_trait_selection/src/solve/eval_ctxt/canonical.rs | 1 -
 compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs       | 8 ++------
 compiler/rustc_trait_selection/src/traits/fulfill.rs            | 7 +++++--
 compiler/rustc_trait_selection/src/traits/select/mod.rs         | 7 +++++--
 4 files changed, 12 insertions(+), 11 deletions(-)

(limited to 'compiler/rustc_trait_selection')

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 f6ec6549084..bc248754f16 100644
--- a/compiler/rustc_trait_selection/src/solve/eval_ctxt/canonical.rs
+++ b/compiler/rustc_trait_selection/src/solve/eval_ctxt/canonical.rs
@@ -362,7 +362,6 @@ impl<'tcx> EvalCtxt<'_, InferCtxt<'tcx>> {
         for (&orig, response) in iter::zip(original_values, var_values.var_values) {
             let InferOk { value: (), obligations } = infcx
                 .at(&cause, param_env)
-                .trace(orig, response)
                 .eq_structurally_relating_aliases(orig, response)
                 .unwrap();
             assert!(obligations.is_empty());
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 4cf0af94811..9ae0809e96e 100644
--- a/compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs
+++ b/compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs
@@ -774,7 +774,6 @@ impl<'tcx> EvalCtxt<'_, InferCtxt<'tcx>> {
             let InferOk { value: (), obligations } = self
                 .infcx
                 .at(&ObligationCause::dummy(), param_env)
-                .trace(term, ctor_term)
                 .eq_structurally_relating_aliases(term, ctor_term)?;
             debug_assert!(obligations.is_empty());
             self.relate(param_env, alias, variance, rigid_ctor)
@@ -794,11 +793,8 @@ impl<'tcx> EvalCtxt<'_, InferCtxt<'tcx>> {
         rhs: T,
     ) -> Result<(), NoSolution> {
         let cause = ObligationCause::dummy();
-        let InferOk { value: (), obligations } = self
-            .infcx
-            .at(&cause, param_env)
-            .trace(lhs, rhs)
-            .eq_structurally_relating_aliases(lhs, rhs)?;
+        let InferOk { value: (), obligations } =
+            self.infcx.at(&cause, param_env).eq_structurally_relating_aliases(lhs, rhs)?;
         assert!(obligations.is_empty());
         Ok(())
     }
diff --git a/compiler/rustc_trait_selection/src/traits/fulfill.rs b/compiler/rustc_trait_selection/src/traits/fulfill.rs
index 07fcf109fda..629f6f394af 100644
--- a/compiler/rustc_trait_selection/src/traits/fulfill.rs
+++ b/compiler/rustc_trait_selection/src/traits/fulfill.rs
@@ -566,10 +566,13 @@ impl<'a, 'tcx> ObligationProcessor for FulfillProcessor<'a, 'tcx> {
                             {
                                 if let Ok(new_obligations) = infcx
                                     .at(&obligation.cause, obligation.param_env)
-                                    .trace(c1, c2)
                                     // Can define opaque types as this is only reachable with
                                     // `generic_const_exprs`
-                                    .eq(DefineOpaqueTypes::Yes, a.args, b.args)
+                                    .eq(
+                                        DefineOpaqueTypes::Yes,
+                                        ty::AliasTerm::from(a),
+                                        ty::AliasTerm::from(b),
+                                    )
                                 {
                                     return ProcessResult::Changed(mk_pending(
                                         new_obligations.into_obligations(),
diff --git a/compiler/rustc_trait_selection/src/traits/select/mod.rs b/compiler/rustc_trait_selection/src/traits/select/mod.rs
index 696b1c15115..7aec4e1987e 100644
--- a/compiler/rustc_trait_selection/src/traits/select/mod.rs
+++ b/compiler/rustc_trait_selection/src/traits/select/mod.rs
@@ -910,10 +910,13 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
                                 if let Ok(InferOk { obligations, value: () }) = self
                                     .infcx
                                     .at(&obligation.cause, obligation.param_env)
-                                    .trace(c1, c2)
                                     // Can define opaque types as this is only reachable with
                                     // `generic_const_exprs`
-                                    .eq(DefineOpaqueTypes::Yes, a.args, b.args)
+                                    .eq(
+                                        DefineOpaqueTypes::Yes,
+                                        ty::AliasTerm::from(a),
+                                        ty::AliasTerm::from(b),
+                                    )
                                 {
                                     return self.evaluate_predicates_recursively(
                                         previous_stack,
-- 
cgit 1.4.1-3-g733a5