[llvm] MachineScheduler: Improve instruction clustering (PR #137784)

[Matt Arsenault via llvm-commits]

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@@ -2093,6 +2090,21 @@ void BaseMemOpClusterMutation::clusterNeighboringMemOps(
                       << ", Curr cluster bytes: " << CurrentClusterBytes
                       << "\n");
   }
+
+  // Add cluster group information.
+  // Iterate over all of the equivalence sets.
+  auto &AllClusters = DAG->getClusters();
+  for (auto &I : Clusters) {
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arsenm wrote:

No auto, I have no idea what these types are 

https://github.com/llvm/llvm-project/pull/137784