Fix issue if linking var to child linked var. Now it always replaced to parent.

This allow do in code like this:

    var1 = param1;
    var2 = var1;
    if (var2)
    {
        // do some work with param1 or var1 or var2
    }

2 files changed, 5 insertions, 2 deletions

diff --git a/src/analysis/analysis.cpp b/src/analysis/analysis.cpp
index 7a5ead8..172917c 100644
--- a/src/analysis/analysis.cpp
+++ b/src/analysis/analysis.cpp
@@ -121,9 +121,12 @@ void removeNeedCheckNullVarsSet(WalkItem &wi, std::set<std::string> &vars)
 
 // link var to parent. (type var = parent)
 void addLinkedVar(WalkItem &wi,
-                  const std::string &parent,
+                  std::string parent,
                   const std::string &var)
 {
+    // found parent as already linked var. need change parent to real parent
+    if (wi.linkedReverseVars.find(parent) != wi.linkedReverseVars.end())
+        parent = wi.linkedReverseVars[parent];
     if (wi.linkedVars.find(parent) == wi.linkedVars.end())
         wi.linkedVars[parent] = std::set<std::string>();
     wi.linkedVars[parent].insert(var);
diff --git a/src/analysis/analysis.h b/src/analysis/analysis.h
index 4b3ee28..fb4be9b 100644
--- a/src/analysis/analysis.h
+++ b/src/analysis/analysis.h
@@ -53,7 +53,7 @@ namespace Analysis
                         const WalkItem &wi);
 
     void addLinkedVar(WalkItem &wi,
-                      const std::string &parent,
+                      std::string parent,
                       const std::string &var);
 
     void removeNeedCheckNullVar(WalkItem &wi, std::string str);