Support covergroups, coverpoints, and bins (#784) (#7117)

Fixes #784.

src/Verilator.cpp

@@ -38,6 +38,7 @@
 #include "V3Control.h"
 #include "V3Coverage.h"
 #include "V3CoverageJoin.h"
+#include "V3Covergroup.h"
 #include "V3Dead.h"
 #include "V3Delayed.h"
 #include "V3Depth.h"
@@ -240,6 +241,10 @@ static void process() {
         // the AST context needed to recover and lower FSMs reliably.
         if (v3Global.opt.coverageNonFsm()) V3Coverage::coverage(v3Global.rootp());
 
+        // Functional coverage code generation
+        //    Generate code for covergroups/coverpoints
+        if (v3Global.useCovergroup()) V3Covergroup::covergroup(v3Global.rootp());
+
         // Resolve randsequence if they are used by the design
         if (v3Global.useRandSequence()) V3RandSequence::randSequenceNetlist(v3Global.rootp());