Index: lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
===================================================================
--- lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
+++ lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
@@ -2939,6 +2939,24 @@
             (cast<RegisterSDNode>(N->getOperand(1))->getReg()))
         continue;
 
+    // Try to find the predecessor which is not data dependence.
+    SDNode *PredND = nullptr;
+    for (const SDep &Pred : SU.Preds)
+      if (Pred.isCtrl() && Pred.getSUnit()) {
+        PredND = Pred.getSUnit()->getNode();
+        break;
+      }
+    // If PredND is FrameSetup, we should not pre-scheduled the node,
+    // or else, when bottom up scheduling, ADJCALLSTACKDOWN and
+    // ADJCALLSTACKUP may hold CallResource too long and make other
+    // calls can't be scheduled. If there's no other available node
+    // to schedule, the schedular will try to rename the register by
+    // creating copy to avoid the conflict which will fail because
+    // CallResource is not a real physical register.
+    if (PredND && PredND->isMachineOpcode() &&
+        (PredND->getMachineOpcode() == TII->getCallFrameSetupOpcode()))
+      continue;
+
     // Locate the single data predecessor.
     SUnit *PredSU = nullptr;
     for (const SDep &Pred : SU.Preds)