Don't move function calls before the expression (#4413)

src/V3Delayed.cpp

@@ -551,7 +551,9 @@ private:
             }
             if (!lhsp->backp()) VL_DO_DANGLING(pushDeletep(lhsp), lhsp);
         } else {
-            iterateChildren(nodep);
+            iterate(nodep->lhsp());
+            m_inDly = false;
+            iterate(nodep->rhsp());
         }
     }
 
@@ -623,9 +625,9 @@ private:
         m_inLoop = true;
         iterateChildren(nodep);
     }
-    void visit(AstNodeAssign* nodep) override {
+    void visit(AstExprStmt* nodep) override {
         VL_RESTORER(m_inDly);
-        // Restoring is needed in nested assignments, like a <= (x = y);
+        // Restoring is needed, because AstExprStmt may contain assignments
         m_inDly = false;
         iterateChildren(nodep);
     }