Index: lib/CodeGen/SelectionDAG/SelectionDAG.cpp
===================================================================
--- lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2563,6 +2563,11 @@
     if (Tmp == 1) return 1;  // Early out.
     Tmp2 = ComputeNumSignBits(Op.getOperand(2), Depth+1);
     return std::min(Tmp, Tmp2);
+  case ISD::SELECT_CC:
+    Tmp = ComputeNumSignBits(Op.getOperand(2), Depth+1);
+    if (Tmp == 1) return 1;  // Early out.
+    Tmp2 = ComputeNumSignBits(Op.getOperand(3), Depth+1);
+    return std::min(Tmp, Tmp2);
   case ISD::SMIN:
   case ISD::SMAX:
   case ISD::UMIN: