[analyzer] Speed up ExplodedNode::Profile by avoiding copy constructors.

ProgramStateRef::Retain isn't free!

llvm-svn: 169525

clang/include/clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h

@@ -174,7 +174,8 @@ public:
   }
 
   void Profile(llvm::FoldingSetNodeID& ID) const {
-    Profile(ID, getLocation(), getState(), isSink());
+    // We avoid copy constructors by not using accessors.
+    Profile(ID, Location, State, isSink());
   }
 
   /// addPredeccessor - Adds a predecessor to the current node, and