Support default value on module input (#5358) (#5373)

src/V3LinkLValue.cpp

@@ -62,8 +62,11 @@ class LinkLValueVisitor final : public VNVisitor {
             if (m_setForcedByCode) {
                 nodep->varp()->setForcedByCode();
             } else if (!nodep->varp()->isFuncLocal() && nodep->varp()->isReadOnly()) {
-                nodep->v3warn(ASSIGNIN,
-                              "Assigning to input/const variable: " << nodep->prettyNameQ());
+                // This is allowed with IEEE 1800-2009 module input with default value.
+                // the checking now happens in V3Width::visit(AstNodeVarRef*)
+                // If you were to check here, it would fail on module inputs with default value,
+                // because Inputs are isReadOnly()=true, and we don't yet have visibility into
+                // it being an Initial style procedure.
             }
         }
         iterateChildren(nodep);