Index: include/llvm/CodeGen/MachineInstr.h
===================================================================
--- include/llvm/CodeGen/MachineInstr.h
+++ include/llvm/CodeGen/MachineInstr.h
@@ -369,6 +369,9 @@
     return NumMemRefs == 1;
   }
 
+  /// Returns the number of MachineMemOperands.
+  unsigned numMemOperands() const { return NumMemRefs; }
+
   /// API for querying MachineInstr properties. They are the same as MCInstrDesc
   /// queries but they are bundle aware.
 
Index: lib/CodeGen/ScheduleDAGInstrs.cpp
===================================================================
--- lib/CodeGen/ScheduleDAGInstrs.cpp
+++ lib/CodeGen/ScheduleDAGInstrs.cpp
@@ -519,7 +519,8 @@
 /// (like a call or something with unmodeled side effects).
 static inline bool isGlobalMemoryObject(AliasAnalysis *AA, MachineInstr *MI) {
   return MI->isCall() || MI->hasUnmodeledSideEffects() ||
-         (MI->hasOrderedMemoryRef() && !MI->isInvariantLoad(AA));
+         ((MI->hasOrderedMemoryRef() || MI->numMemOperands() > 1) &&
+          !MI->isInvariantLoad(AA));
 }
 
 // This MI might have either incomplete info, or known to be unsafe