[compiler][modules] Constant-fold the loads of module cells.

src/compiler/js-typed-lowering.cc

Index: src/compiler/js-typed-lowering.cc
diff --git a/src/compiler/js-typed-lowering.cc b/src/compiler/js-typed-lowering.cc
index b3f6af87b502cf0d60e530be4fe06d004c9682ba..dc39828b09ffaa74b2276f9813b355e590f692a4 100644
--- a/src/compiler/js-typed-lowering.cc
+++ b/src/compiler/js-typed-lowering.cc
@@ -1399,6 +1399,14 @@ Node* JSTypedLowering::BuildGetModuleCell(Node* node) {
 
   int32_t cell_index = OpParameter<int32_t>(node);
   Node* module = NodeProperties::GetValueInput(node, 0);
+  Type* module_type = NodeProperties::GetType(module);
+
+  if (module_type->IsHeapConstant()) {
+    Handle<Module> module_constant =
+        Handle<Module>::cast(module_type->AsHeapConstant()->Value());
+    Handle<Cell> cell_constant(module_constant->GetCell(cell_index), isolate());
+    return jsgraph()->HeapConstant(cell_constant);
+  }
 
   FieldAccess field_access;
   int index;