1 files changed, 6 insertions, 1 deletions
diff --git a/compiler/rustc_middle/src/mir/basic_blocks.rs b/compiler/rustc_middle/src/mir/basic_blocks.rs
index 1319ddbb877..f5157e18e6d 100644
--- a/compiler/rustc_middle/src/mir/basic_blocks.rs
+++ b/compiler/rustc_middle/src/mir/basic_blocks.rs
@@ -3,6 +3,7 @@ use crate::mir::{BasicBlock, BasicBlockData, Successors, Terminator, TerminatorK
 
 use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::graph;
+use rustc_data_structures::graph::dominators::{dominator_tree, DominatorTree};
 use rustc_data_structures::graph::dominators::{dominators, Dominators};
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
 use rustc_data_structures::sync::OnceCell;
@@ -41,8 +42,12 @@ impl<'tcx> BasicBlocks<'tcx> {
         *self.cache.is_cyclic.get_or_init(|| graph::is_cyclic(self))
     }
 
+    pub fn dominator_tree(&self) -> DominatorTree<BasicBlock> {
+        dominator_tree(&self)
+    }
+
     pub fn dominators(&self) -> Dominators<BasicBlock> {
-        dominators(&self)
+        dominators(&self.dominator_tree())
     }
 
     /// Returns predecessors for each basic block.