[modules] Maintain array of cells for imports and local exports.

src/ast/modules.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/ast/modules.h"
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/scopes.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 194 matching lines @@
       entry->location = import->second->location;
       entry->local_name = nullptr;
       AddSpecialExport(entry, zone);
       it = regular_exports_.erase(it);
     } else {
       it++;
     }
   }
 }
 
+ModuleDescriptor::CellIndexKind ModuleDescriptor::GetCellIndexKind(
+    int cell_index) {
+  if (cell_index > 0) return kExport;
+  if (cell_index < 0) return kImport;
+  return kInvalid;
+}
+
 void ModuleDescriptor::AssignCellIndices() {
   int export_index = 1;
   for (auto it = regular_exports_.begin(); it != regular_exports_.end();) {
     auto current_key = it->first;
     // This local name may be exported under multiple export names.  Assign the
     // same index to each such entry.
     do {
       Entry* entry = it->second;
       DCHECK_NOT_NULL(entry->local_name);
       DCHECK_NULL(entry->import_name);
@@ skipping 82 matching lines @@
     }
   }
 
   MakeIndirectExportsExplicit(zone);
   AssignCellIndices();
   return true;
 }
 
 }  // namespace internal
 }  // namespace v8