[ignition] Add bytecodes for loads/stores in the current context

src/compiler/bytecode-graph-builder.h

Index: src/compiler/bytecode-graph-builder.h
diff --git a/src/compiler/bytecode-graph-builder.h b/src/compiler/bytecode-graph-builder.h
index 53e77a86f11b3ea9cdb3a5cc44ec4c600ed8890a..c6011a31e0bd5d481baa296d5ef9d5bdfe55239a 100644
--- a/src/compiler/bytecode-graph-builder.h
+++ b/src/compiler/bytecode-graph-builder.h
@@ -135,6 +135,7 @@ class BytecodeGraphBuilder {
 
   void BuildCreateArguments(CreateArgumentsType type);
   Node* BuildLoadContextSlot();
+  Node* BuildLoadLocalContextSlot();

[rmcilroy, 2016/10/27 13:44:09]

Could we call this CurrentContext instead (throughout) - local context is a bit
overloaded (it could mean the function local context, which isn't always the
same as the current context).

   Node* BuildLoadGlobal(uint32_t feedback_slot_index, TypeofMode typeof_mode);
   void BuildStoreGlobal(LanguageMode language_mode);
   Node* BuildNamedLoad();