Teach RetainCountChecker that CFPlugInInstanceCreate  does not
return a CF object at all.

Fixes <rdar://problem/9566345>

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@163362 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp b/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
index e95ba52..5d10575 100644
--- a/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
@@ -1074,6 +1074,8 @@
       // The headers on OS X 10.8 use cf_consumed/ns_returns_retained,
       // but we can fully model NSMakeCollectable ourselves.
       AllowAnnotations = false;
+    } else if (FName == "CFPlugInInstanceCreate") {
+      S = getPersistentSummary(RetEffect::MakeNoRet());
     } else if (FName == "IOBSDNameMatching" ||
                FName == "IOServiceMatching" ||
                FName == "IOServiceNameMatching" ||