Optimize loads from variables that might be shadowed by variables...

src/variables.cc

Index: src/variables.cc
===================================================================
--- src/variables.cc	(revision 1289)
+++ src/variables.cc	(working copy)
@@ -110,6 +110,8 @@
     case VAR: return "VAR";
     case CONST: return "CONST";
     case DYNAMIC: return "DYNAMIC";
+    case DYNAMIC_GLOBAL: return "DYNAMIC_GLOBAL";
+    case DYNAMIC_LOCAL: return "DYNAMIC_LOCAL";
     case INTERNAL: return "INTERNAL";
     case TEMPORARY: return "TEMPORARY";
   }
@@ -143,6 +145,7 @@
     mode_(mode),
     is_valid_LHS_(is_valid_LHS),
     is_this_(is_this),
+    local_if_not_shadowed_(NULL),
     is_accessed_from_inner_scope_(false),
     rewrite_(NULL) {
   // names must be canonicalized for fast equality checks
@@ -156,5 +159,4 @@
   return mode_ != TEMPORARY && scope_ != NULL && scope_->is_global_scope();
 }
 
-
 } }  // namespace v8::internal