[interpreter] Add a fast path for dynamic local load

src/interpreter/interpreter.h

Index: src/interpreter/interpreter.h
diff --git a/src/interpreter/interpreter.h b/src/interpreter/interpreter.h
index fda8b5f387daf032c5633b3beb82883adc3deba3..54581884f369af6667537d2ca3a0e0da797d7eee 100644
--- a/src/interpreter/interpreter.h
+++ b/src/interpreter/interpreter.h
@@ -132,6 +132,11 @@ class Interpreter {
   void DoLdaLookupSlot(Runtime::FunctionId function_id,
                        InterpreterAssembler* assembler);
 
+  // Generates code to perform a lookup slot load via |function_id| that can
+  // fast path to a context slot load
+  void DoLdaLookupContextSlot(Runtime::FunctionId function_id,
+                              InterpreterAssembler* assembler);
+
   // Generates code to perform a lookup slot store depending on |language_mode|.
   void DoStaLookupSlot(LanguageMode language_mode,
                        InterpreterAssembler* assembler);