When pretty-printing an anonymous tag type that is associated with a typedef, use the name of the typedef rather than <anonymous>

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66559 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Type.cpp b/lib/AST/Type.cpp
index 412b0cf..f9cf847 100644
--- a/lib/AST/Type.cpp
+++ b/lib/AST/Type.cpp
@@ -1388,8 +1388,15 @@
   const char *ID;
   if (const IdentifierInfo *II = getDecl()->getIdentifier())
     ID = II->getName();
-  else
+  else if (TypedefDecl *Typedef = getDecl()->getTypedefForAnonDecl()) {
+    Kind = 0;
+    assert(Typedef->getIdentifier() && "Typedef without identifier?");
+    ID = Typedef->getIdentifier()->getName();
+  } else
     ID = "<anonymous>";
 
-  InnerString = std::string(Kind) + " " + ID + InnerString;
+  if (Kind)
+    InnerString = std::string(Kind) + " " + ID + InnerString;
+  else
+    InnerString = ID + InnerString;
 }