[ignition,modules] Introduce bytecodes for loading/storing module variables.

test/unittests/interpreter/bytecode-array-builder-unittest.cc

 // Copyright 2014 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/v8.h"
 
 #include "src/interpreter/bytecode-array-builder.h"
 #include "src/interpreter/bytecode-array-iterator.h"
 #include "src/interpreter/bytecode-label.h"
 #include "src/interpreter/bytecode-register-allocator.h"
@@ skipping 314 matching lines @@
 
   // CreateClosureWide
   builder.CreateClosure(1000, NOT_TENURED);
 
   // Emit wide variant of literal creation operations.
   builder.CreateRegExpLiteral(factory->NewStringFromStaticChars("wide_literal"),
                               0, 0)
       .CreateArrayLiteral(factory->NewFixedArray(2), 0, 0)
       .CreateObjectLiteral(factory->NewFixedArray(2), 0, 0, reg);
 
-  // Emit generator operations
+  // Emit load and store operations for module variables.
+  builder.LoadModuleVariable(-1, 42)
+      .LoadModuleVariable(0, 42)
+      .LoadModuleVariable(1, 42)
+      .StoreModuleVariable(-1, 42)
+      .StoreModuleVariable(0, 42)
+      .StoreModuleVariable(1, 42);
+
+  // Emit generator operations.
   builder.SuspendGenerator(reg)
       .ResumeGenerator(reg);
 
   // Intrinsics handled by the interpreter.
   builder.CallRuntime(Runtime::kInlineIsArray, reg_list);
 
   // Emit debugger bytecode.
   builder.Debugger();
 
   // Insert dummy ops to force longer jumps.
@@ skipping 392 matching lines @@
     iterator.Advance();
   }
   CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
   iterator.Advance();
   CHECK(iterator.done());
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8