Fix typo in static_assert for size of LoadSDNodeBitfields.

[fhahn]

Thanks, LGTM. Please wait with committing a bit, in case anyone else wants to chime in.

[jlebar]

Yikes.

Nice catch.

llvm/trunk/include/llvm/CodeGen/SelectionDAGNodes.h

protected:
 
   // RawSDNodeBits must cover the entirety of the union.  This means that all of
   // the union's members must have size <= RawSDNodeBits.  We write the RHS as
   // "2" instead of sizeof(RawSDNodeBits) because MSVC can't handle the latter.
   static_assert(sizeof(SDNodeBitfields) <= 2, "field too wide");
   static_assert(sizeof(ConstantSDNodeBitfields) <= 2, "field too wide");
   static_assert(sizeof(MemSDNodeBitfields) <= 2, "field too wide");
   static_assert(sizeof(LSBaseSDNodeBitfields) <= 2, "field too wide");
-  static_assert(sizeof(LoadSDNodeBitfields) <= 4, "field too wide");
+  static_assert(sizeof(LoadSDNodeBitfields) <= 2, "field too wide");
   static_assert(sizeof(StoreSDNodeBitfields) <= 2, "field too wide");
 
 private:
   friend class SelectionDAG;
   // TODO: unfriend HandleSDNode once we fix its operand handling.
   friend class HandleSDNode;
 
   /// Unique id per SDNode in the DAG.