Silencing an MSVC11 type conversion warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187727 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 90326cb..54063c5 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -5642,7 +5642,7 @@
       break;
     }
     if (cast<ConstantSDNode>(In)->getZExtValue())
-      Immediate |= (1 << idx);
+      Immediate |= (1ULL << idx);
   }
 
   if (AllContants) {