Internals: Fix VL_LEAK_CHECK (#2542).

src/V3Global.cpp

@@ -35,6 +35,12 @@ AstNetlist* V3Global::makeNetlist() {
     return newp;
 }
 
+void V3Global::clear() {
+#ifdef VL_LEAK_CHECK
+    if (m_rootp) VL_DO_CLEAR(m_rootp->deleteTree(), m_rootp = nullptr);
+#endif
+}
+
 void V3Global::shutdown() {
     VL_DO_CLEAR(delete m_hierPlanp, m_hierPlanp = nullptr);  // delete nullptr is safe
 }

src/V3Global.h

@@ -119,6 +119,7 @@ public:
         UASSERT(!m_rootp, "call once");
         m_rootp = makeNetlist();
     }
+    void clear();
     void shutdown();  // Release allocated resorces
     // ACCESSORS (general)
     AstNetlist* rootp() const { return m_rootp; }

src/Verilator.cpp

@@ -623,10 +623,8 @@ static void verilate(const string& argString) {
 
     // Final writing shouldn't throw warnings, but...
     V3Error::abortIfWarnings();
-#ifdef VL_LEAK_CHECKS
     // Cleanup memory for valgrind leak analysis
     v3Global.clear();
-#endif
     FileLine::deleteAllRemaining();
 }