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

[Pengcheng Wang via llvm-commits]

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@@ -61,6 +61,11 @@ bool llvm::fuseInstructionPair(ScheduleDAGInstrs &DAG, SUnit &FirstSU,
   for (SDep &SI : SecondSU.Preds)
     if (SI.isCluster())
       return false;
+
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wangpc-pp wrote:

I think the MacroFusion changes have no effect, do I understand it correctly?

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