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-rw-r--r--llvm/lib/CodeGen/MachineScheduler.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp
index a148a891a86..e42701b9c6c 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/lib/CodeGen/MachineScheduler.cpp
@@ -1573,6 +1573,8 @@ void BaseMemOpClusterMutation::clusterNeighboringMemOps(
for (unsigned Idx = 0, End = MemOpRecords.size(); Idx < (End - 1); ++Idx) {
SUnit *SUa = MemOpRecords[Idx].SU;
SUnit *SUb = MemOpRecords[Idx+1].SU;
+ if (SUa->NodeNum > SUb->NodeNum)
+ std::swap(SUa, SUb);
if (TII->shouldClusterMemOps(*MemOpRecords[Idx].BaseOp,
*MemOpRecords[Idx + 1].BaseOp,
ClusterLength) &&
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