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-rw-r--r--compiler/rustc_data_structures/src/graph/dominators/mod.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_data_structures/src/graph/dominators/mod.rs b/compiler/rustc_data_structures/src/graph/dominators/mod.rs
index 07b1ace2189..fb2a22e94a5 100644
--- a/compiler/rustc_data_structures/src/graph/dominators/mod.rs
+++ b/compiler/rustc_data_structures/src/graph/dominators/mod.rs
@@ -299,7 +299,7 @@ impl<Node: Idx> Dominators<Node> {
     /// of two unrelated nodes will also be consistent, but otherwise the order has no
     /// meaning.) This method cannot be used to determine if either Node dominates the other.
     pub fn rank_partial_cmp(&self, lhs: Node, rhs: Node) -> Option<Ordering> {
-        self.post_order_rank[lhs].partial_cmp(&self.post_order_rank[rhs])
+        self.post_order_rank[rhs].partial_cmp(&self.post_order_rank[lhs])
     }
 }