Index: lib/Transforms/Scalar/LoopStrengthReduce.cpp
===================================================================
--- lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -776,10 +776,17 @@
     // of intrinsics.
     switch (II->getIntrinsicID()) {
       default: break;
+      case Intrinsic::memset:
       case Intrinsic::prefetch:
         if (II->getArgOperand(0) == OperandVal)
           isAddress = true;
         break;
+      case Intrinsic::memmove:
+      case Intrinsic::memcpy:
+        if (II->getArgOperand(0) == OperandVal ||
+            II->getArgOperand(1) == OperandVal)
+          isAddress = true;
+        break;
     }
   } else if (AtomicRMWInst *RMW = dyn_cast<AtomicRMWInst>(Inst)) {
     if (RMW->getPointerOperand() == OperandVal)