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

src/interpreter/bytecode-array-builder.h

Index: src/interpreter/bytecode-array-builder.h
diff --git a/src/interpreter/bytecode-array-builder.h b/src/interpreter/bytecode-array-builder.h
index 5f37c280d453d3d78e834f81c1a2516288c895be..fbe4655b043489bf02c54bbee0cca17846821ab3 100644
--- a/src/interpreter/bytecode-array-builder.h
+++ b/src/interpreter/bytecode-array-builder.h
@@ -99,6 +99,10 @@ class V8_EXPORT_PRIVATE BytecodeArrayBuilder final
   BytecodeArrayBuilder& StoreContextSlot(Register context, int slot_index,
                                          int depth);
 
+  // Load from/store to the module variable with the given index.

[rmcilroy, 2016/11/03 13:58:06]

nit - load from accumulator / store accumulator to the...

[neis, 2016/11/04 10:37:23]

It loads from the module variable, not from the accumulator.  I tried to make it
clearer now.

+  BytecodeArrayBuilder& LoadModuleVariable(int index);
+  BytecodeArrayBuilder& StoreModuleVariable(int index);
+
   // Register-accumulator transfers.
   BytecodeArrayBuilder& LoadAccumulatorWithRegister(Register reg);
   BytecodeArrayBuilder& StoreAccumulatorInRegister(Register reg);