[interpreter] Add fast path for dynamic global lookups

src/interpreter/interpreter.h

Index: src/interpreter/interpreter.h
diff --git a/src/interpreter/interpreter.h b/src/interpreter/interpreter.h
index 1e37b11396337eea8ccaeea38383d601cf0644d4..3e6089c15fbf57e500b77db67a13f6aba50cfb6e 100644
--- a/src/interpreter/interpreter.h
+++ b/src/interpreter/interpreter.h
@@ -128,6 +128,12 @@ class Interpreter {
   void DoDelete(Runtime::FunctionId function_id,
                 InterpreterAssembler* assembler);
 
+  // Generates code to perform a lookup slot load via |function_id| by calling
+  // out to the runtime.
+  void DoLdaLookupSlowPath(Runtime::FunctionId function_id,
+                           compiler::Node* name_index, compiler::Node* context,
+                           InterpreterAssembler* assembler);
+
   // Generates code to perform a lookup slot load via |function_id|.
   void DoLdaLookupSlot(Runtime::FunctionId function_id,
                        InterpreterAssembler* assembler);
@@ -137,7 +143,13 @@ class Interpreter {
   void DoLdaLookupContextSlot(Runtime::FunctionId function_id,
                               InterpreterAssembler* assembler);
 
-  // Generates code to perform a lookup slot store depending on |language_mode|.
+  // Generates code to perform a lookup slot load via |function_id| that can
+  // fast path to a global load

[rmcilroy, 2016/09/19 09:04:29]

fullstop

[Leszek Swirski, 2016/09/19 10:34:51]

Obsolete, function got removed.

+  void DoLdaLookupGlobalSlot(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);
 
@@ -145,6 +157,11 @@ class Interpreter {
   compiler::Node* BuildLoadContextSlot(InterpreterAssembler* assembler);
 
   // Generates code to load a global.
+  compiler::Node* BuildLoadGlobal(Callable ic, compiler::Node* context,
+                                  compiler::Node* raw_slot,
+                                  InterpreterAssembler* assembler);
+
+  // Generates code to load a global.
   compiler::Node* BuildLoadGlobal(Callable ic, InterpreterAssembler* assembler);
 
   // Generates code to load a named property.