objc-arc: enforce performSelector rules in rejecting retaining selectors
passed to it, and unknown selectors causing potential leak.
// rdar://9659270


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134449 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/IdentifierTable.cpp b/lib/Basic/IdentifierTable.cpp
index 109761c..188e2d4 100644
--- a/lib/Basic/IdentifierTable.cpp
+++ b/lib/Basic/IdentifierTable.cpp
@@ -397,6 +397,8 @@
     if (name == "retainCount") return OMF_retainCount;
     if (name == "self") return OMF_self;
   }
+ 
+  if (name == "performSelector") return OMF_performSelector;
 
   // The other method families may begin with a prefix of underscores.
   while (!name.empty() && name.front() == '_')