[compiler,modules] Introduce JS operators for module loads and stores.

src/compiler/js-generic-lowering.cc

Index: src/compiler/js-generic-lowering.cc
diff --git a/src/compiler/js-generic-lowering.cc b/src/compiler/js-generic-lowering.cc
index 84638147ea0a0c96783f248e3563af8c54e5e756..57b976976c20f804b9e28d51ae8a55605a3e11c4 100644
--- a/src/compiler/js-generic-lowering.cc
+++ b/src/compiler/js-generic-lowering.cc
@@ -625,6 +625,14 @@ void JSGenericLowering::LowerJSStoreMessage(Node* node) {
   NodeProperties::ChangeOp(node, machine()->Store(representation));
 }
 
+void JSGenericLowering::LowerJSLoadModule(Node* node) {
+  UNREACHABLE();  // Eliminated in typed lowering.
+}
+
+void JSGenericLowering::LowerJSStoreModule(Node* node) {
+  UNREACHABLE();  // Eliminated in typed lowering.
+}
+
 void JSGenericLowering::LowerJSGeneratorStore(Node* node) {
   UNREACHABLE();  // Eliminated in typed lowering.
 }