diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index f9388185b43..b5e24db0634 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -229,6 +229,7 @@ namespace {
     SDValue visitSHL(SDNode *N);
     SDValue visitSRA(SDNode *N);
     SDValue visitSRL(SDNode *N);
+    SDValue visitRotate(SDNode *N);
     SDValue visitCTLZ(SDNode *N);
     SDValue visitCTLZ_ZERO_UNDEF(SDNode *N);
     SDValue visitCTTZ(SDNode *N);
@@ -1194,6 +1195,8 @@ SDValue DAGCombiner::visit(SDNode *N) {
   case ISD::SHL:                return visitSHL(N);
   case ISD::SRA:                return visitSRA(N);
   case ISD::SRL:                return visitSRL(N);
+  case ISD::ROTR:
+  case ISD::ROTL:               return visitRotate(N);
   case ISD::CTLZ:               return visitCTLZ(N);
   case ISD::CTLZ_ZERO_UNDEF:    return visitCTLZ_ZERO_UNDEF(N);
   case ISD::CTTZ:               return visitCTTZ(N);
@@ -3899,6 +3902,19 @@ SDValue DAGCombiner::distributeTruncateThroughAnd(SDNode *N) {
 
   return SDValue();
 }
+
+SDValue DAGCombiner::visitRotate(SDNode *N) {
+  // fold (rot* x, (trunc (and y, c))) -> (rot* x, (and (trunc y), (trunc c))).
+  if (N->getOperand(1).getOpcode() == ISD::TRUNCATE &&
+      N->getOperand(1).getOperand(0).getOpcode() == ISD::AND) {
+    SDValue NewOp1 = distributeTruncateThroughAnd(N->getOperand(1).getNode());
+    if (NewOp1.getNode())
+      return DAG.getNode(N->getOpcode(), SDLoc(N), N->getValueType(0),
+                         N->getOperand(0), NewOp1);
+  }
+  return SDValue();
+}
+
 SDValue DAGCombiner::visitSHL(SDNode *N) {
   SDValue N0 = N->getOperand(0);
   SDValue N1 = N->getOperand(1);