add multifile support

src/PrivateAnalyzer/region.cpp

@@ -14,6 +14,7 @@ using namespace std;
 
 static bool isParentStmt(SgStatement* stmt, SgStatement* parent)
 {
+    // && sgStats.find(stmt->thebif) == sgStats.end()
     for (; stmt; stmt = stmt->controlParent())
         if (stmt == parent)
             return true;