Use Twine instead of utostr


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@77848 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGCall.cpp b/lib/CodeGen/CGCall.cpp
index be30fcc..31ed8a6 100644
--- a/lib/CodeGen/CGCall.cpp
+++ b/lib/CodeGen/CGCall.cpp
@@ -594,7 +594,7 @@
       // Name the arguments used in expansion and increment AI.
       unsigned Index = 0;
       for (; AI != End; ++AI, ++Index)
-        AI->setName(Name + "." + llvm::utostr(Index));
+        AI->setName(Name + "." + llvm::Twine(Index));
       continue;
     }