1 files changed, 12 insertions, 4 deletions
diff --git a/clang/include/clang/Analysis/PathSensitive/Checker.h b/clang/include/clang/Analysis/PathSensitive/Checker.h
index 4e00d69cdba..59ce71e616c 100644
--- a/clang/include/clang/Analysis/PathSensitive/Checker.h
+++ b/clang/include/clang/Analysis/PathSensitive/Checker.h
@@ -104,16 +104,24 @@ private:
                 GRStmtNodeBuilder &Builder,
                 GRExprEngine &Eng,
                 const Stmt *stmt,
-                ExplodedNode *Pred, bool isPrevisit) {
-    CheckerContext C(Dst, Builder, Eng, Pred, getTag(), isPrevisit);
+                ExplodedNode *Pred, void *tag, bool isPrevisit) {
+    CheckerContext C(Dst, Builder, Eng, Pred, tag, isPrevisit);
     assert(isPrevisit && "Only previsit supported for now.");
     _PreVisit(C, stmt);
   }
 
+
+
 public:
   virtual ~Checker() {}
-  virtual void _PreVisit(CheckerContext &C, const Stmt *stmt) = 0;
-  virtual const void *getTag() = 0;
+  virtual void _PreVisit(CheckerContext &C, const Stmt *stmt) {}
+  
+  // This is a previsit which takes a node returns a node.
+  virtual ExplodedNode *CheckLocation(const Stmt *S, ExplodedNode *Pred,
+                                      const GRState *state, SVal V,
+                                      GRExprEngine &Eng) {
+    return Pred;
+  }
 };
 
 } // end clang namespace