Add std:: to sort calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43652 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index feb9d75..44d8188 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -1915,7 +1915,7 @@
                          SI.getSuccessorValue(i),
                          SMBB));
   }
-  sort(Cases.begin(), Cases.end(), CaseCmp());
+  std::sort(Cases.begin(), Cases.end(), CaseCmp());
 
   // Merge case into clusters
   if (Cases.size()>=2)