Fix Verilog coverage to pass real column information

src/V3AstNodes.h

@@ -3322,14 +3322,12 @@ private:
     string m_page;
     string m_text;
     string m_hier;
-    int m_column;
     int m_binNum;  // Set by V3EmitCSyms to tell final V3Emit what to increment
 public:
-    AstCoverDecl(FileLine* fl, int column, const string& page, const string& comment)
+    AstCoverDecl(FileLine* fl, const string& page, const string& comment)
         : ASTGEN_SUPER(fl) {
-        m_text = comment;
         m_page = page;
-        m_column = column;
+        m_text = comment;
         m_binNum = 0;
         m_dataDeclp = NULL;
     }
@@ -3347,7 +3345,6 @@ public:
     virtual void dump(std::ostream& str) const;
     virtual int instrCount() const { return 1 + 2 * instrCountLd(); }
     virtual bool maybePointedTo() const { return true; }
-    int column() const { return m_column; }
     void binNum(int flag) { m_binNum = flag; }
     int binNum() const { return m_binNum; }
     const string& comment() const { return m_text; }  // text to insert in code
@@ -3359,7 +3356,7 @@ public:
     virtual bool same(const AstNode* samep) const {
         const AstCoverDecl* asamep = static_cast<const AstCoverDecl*>(samep);
         return (fileline() == asamep->fileline() && hier() == asamep->hier()
-                && comment() == asamep->comment() && column() == asamep->column());
+                && comment() == asamep->comment());
     }
     virtual bool isPredictOptimizable() const { return false; }
     void dataDeclp(AstCoverDecl* nodep) { m_dataDeclp = nodep; }

src/V3Coverage.cpp

@@ -40,7 +40,7 @@
 class CoverageVisitor : public AstNVisitor {
 private:
     // TYPES
-    typedef std::map<string, int> FileMap;
+    typedef std::map<string, int> VarNameMap;
 
     struct ToggleEnt {
         string m_comment;  // Comment for coverage dump
@@ -67,7 +67,7 @@ private:
     AstNodeModule* m_modp;  // Current module to add statement to
     bool m_inToggleOff;  // In function/task etc
     bool m_inModOff;  // In module with no coverage
-    FileMap m_fileps;  // Column counts for each fileline
+    VarNameMap m_varnames;  // Uniquification of inserted variable names
     string m_beginHier;  // AstBegin hier name for user coverage points
 
     // METHODS
@@ -98,13 +98,6 @@ private:
         // different types of coverage enabled.)
         string key = fl->filename() + "\001" + cvtToStr(fl->lineno()) + "\001" + hier + "\001"
                      + page_prefix + "\001" + comment;
-        int column = 0;
-        FileMap::iterator it = m_fileps.find(key);
-        if (it == m_fileps.end()) {
-            m_fileps.insert(make_pair(key, column + 1));
-        } else {
-            column = (it->second)++;
-        }
 
         // We could use the basename of the filename to the page, but seems
         // better for code from an include file to be listed under the
@@ -114,7 +107,7 @@ private:
         // Someday the user might be allowed to specify a different page suffix
         string page = page_prefix + "/" + m_modp->prettyName();
 
-        AstCoverDecl* declp = new AstCoverDecl(fl, column, page, comment);
+        AstCoverDecl* declp = new AstCoverDecl(fl, page, comment);
         declp->hier(hier);
         m_modp->addStmtp(declp);
 
@@ -135,8 +128,16 @@ private:
         return incp;
     }
     string traceNameForLine(AstNode* nodep, const string& type) {
-        return "vlCoverageLineTrace_" + nodep->fileline()->filebasenameNoExt() + "__"
-               + cvtToStr(nodep->fileline()->lineno()) + "_" + type;
+        string name = "vlCoverageLineTrace_" + nodep->fileline()->filebasenameNoExt() + "__"
+                      + cvtToStr(nodep->fileline()->lineno()) + "_" + type;
+        VarNameMap::iterator it = m_varnames.find(name);
+        if (it == m_varnames.end()) {
+            m_varnames.insert(make_pair(name, 1));
+        } else {
+            int suffix = (it->second)++;
+            name += "_" + cvtToStr(suffix);
+        }
+        return name;
     }
     // VISITORS - BOTH
     virtual void visit(AstNodeModule* nodep) VL_OVERRIDE {
@@ -145,7 +146,7 @@ private:
         {
             m_modp = nodep;
             m_inModOff = nodep->isTop();  // Ignore coverage on top module; it's a shell we created
-            m_fileps.clear();
+            if (!origModp) m_varnames.clear();
             iterateChildren(nodep);
         }
         m_modp = origModp;

src/V3EmitC.cpp

@@ -400,7 +400,7 @@ public:
         puts(", ");
         puts(cvtToStr(nodep->fileline()->lineno()));
         puts(", ");
-        puts(cvtToStr(nodep->column()));
+        puts(cvtToStr(nodep->fileline()->firstColumn()));
         puts(", ");
         putsQuoted((!nodep->hier().empty() ? "." : "")
                    + protectWordsIf(nodep->hier(), nodep->protect()));