type_ir: add faster exit for types_may_unify

2025-05-13 16:47:10 +00:00
parent a5e1dba0cd
commit febb16a40f
1 changed files with 3 additions and 0 deletions
--- a/compiler/rustc_type_ir/src/fast_reject.rs
+++ b/compiler/rustc_type_ir/src/fast_reject.rs
@@ -232,6 +232,9 @@ impl<I: Interner, const INSTANTIATE_LHS_WITH_INFER: bool, const INSTANTIATE_RHS_
    }

    pub fn types_may_unify(self, lhs: I::Ty, rhs: I::Ty) -> bool {
+        if lhs == rhs {
+            return true;
+        }
        self.types_may_unify_inner(lhs, rhs, Self::STARTING_DEPTH)
    }