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

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

Index: test/unittests/interpreter/bytecode-array-builder-unittest.cc
diff --git a/test/unittests/interpreter/bytecode-array-builder-unittest.cc b/test/unittests/interpreter/bytecode-array-builder-unittest.cc
index 9ce46c4a7534005bc159b731638073b43d36a887..6a5f311108a663f50fcee3990860ad8d392512bd 100644
--- a/test/unittests/interpreter/bytecode-array-builder-unittest.cc
+++ b/test/unittests/interpreter/bytecode-array-builder-unittest.cc
@@ -332,7 +332,15 @@ TEST_F(BytecodeArrayBuilderTest, AllBytecodesGenerated) {
       .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)
+      .LoadModuleVariable(0)
+      .LoadModuleVariable(1)
+      .StoreModuleVariable(-1)
+      .StoreModuleVariable(0)
+      .StoreModuleVariable(1);
+
+  // Emit generator operations.
   builder.SuspendGenerator(reg)
       .ResumeGenerator(reg);