1 files changed, 4 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 2523bb2451..e4f3027053 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -4241,12 +4241,15 @@ SDValue DAGCombiner::ReduceLoadWidth(SDNode *N) {
           return SDValue();
       }
 
+      // At this point, we must have a load or else we can't do the transform.
+      if (!isa<LoadSDNode>(N0)) return SDValue();
+      
       // If the shift amount is larger than the input type then we're not
       // accessing any of the loaded bytes.  If the load was a zextload/extload
       // then the result of the shift+trunc is zero/undef (handled elsewhere).
       // If the load was a sextload then the result is a splat of the sign bit
       // of the extended byte.  This is not worth optimizing for.
-      if (ShAmt >= VT.getSizeInBits())
+      if (ShAmt >= cast<LoadSDNode>(N0)->getMemoryVT().getSizeInBits())
         return SDValue();
     }
   }