Switched FormatAttr to using an IdentifierArgument instead of a StringArgument since that is a more accurate modeling.

llvm-svn: 189851
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index 499c21c..82eca73 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -2141,7 +2141,7 @@
 }
 
 Sema::FormatStringType Sema::GetFormatStringType(const FormatAttr *Format) {
-  return llvm::StringSwitch<FormatStringType>(Format->getType())
+  return llvm::StringSwitch<FormatStringType>(Format->getType()->getName())
   .Case("scanf", FST_Scanf)
   .Cases("printf", "printf0", FST_Printf)
   .Cases("NSString", "CFString", FST_NSString)