[MachinePipeliner] Fix incorrect dependency direction (#149436)

This patch fixes a bug introduced in #145878. A dependency was added in
the wrong direction, causing an assertion failure due to broken
topological order.

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/MachinePipeliner.cpp b/llvm/lib/CodeGen/MachinePipeliner.cpp
index b38a4d1c..90005bd 100644
--- a/llvm/lib/CodeGen/MachinePipeliner.cpp
+++ b/llvm/lib/CodeGen/MachinePipeliner.cpp
@@ -4279,8 +4279,8 @@ void LoopCarriedEdges::modifySUnits(std::vector<SUnit> &SUnits,
             !TII->isGlobalMemoryObject(FromMI) &&
             !TII->isGlobalMemoryObject(ToMI) && !isSuccOrder(From, To)) {
           SDep Pred = Dep;
-          Pred.setSUnit(Src);
-          Dst->addPred(Pred);
+          Pred.setSUnit(From);
+          To->addPred(Pred);
         }
       }
     }