Fix warning with gcc-4.0 and signed/unsigned.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85648 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index 7243c33..c0d2a4d 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -4233,7 +4233,7 @@
     EVT Ty = Arg.getValueType();
 
     if (CI->getZExtValue() < 2)
-      setValue(&I, DAG.getConstant(-1, Ty));
+      setValue(&I, DAG.getConstant(-1U, Ty));
     else
       setValue(&I, DAG.getConstant(0, Ty));
     return 0;