Allow closures to be optimized if outer contexts that call eval are all in strict mode.

src/scopes.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 200 matching lines @@
   bool is_function_scope() const { return type_ == FUNCTION_SCOPE; }
   bool is_global_scope() const { return type_ == GLOBAL_SCOPE; }
   bool is_strict_mode() const { return strict_mode_; }
   bool is_strict_mode_eval_scope() const {
     return is_eval_scope() && is_strict_mode();
   }
 
   // Information about which scopes calls eval.
   bool calls_eval() const { return scope_calls_eval_; }
   bool outer_scope_calls_eval() const { return outer_scope_calls_eval_; }
+  bool outer_scope_calls_non_strict_eval() const {
+    return outer_scope_calls_non_strict_eval_;
+  }
 
   // Is this scope inside a with statement.
   bool inside_with() const { return scope_inside_with_; }
   // Does this scope contain a with statement.
   bool contains_with() const { return scope_contains_with_; }
 
   // The scope immediately surrounding this scope, or NULL.
   Scope* outer_scope() const { return outer_scope_; }
 
   // ---------------------------------------------------------------------------
@@ skipping 134 matching lines @@
   Expression* illegal_redecl_;
 
   // Scope-specific information.
   bool scope_inside_with_;  // this scope is inside a 'with' of some outer scope
   bool scope_contains_with_;  // this scope contains a 'with' statement
   bool scope_calls_eval_;  // this scope contains an 'eval' call
   bool strict_mode_;  // this scope is a strict mode scope
 
   // Computed via PropagateScopeInfo.
   bool outer_scope_calls_eval_;
+  bool outer_scope_calls_non_strict_eval_;
   bool inner_scope_calls_eval_;
   bool outer_scope_is_eval_scope_;
   bool force_eager_compilation_;
 
   // Computed via AllocateVariables; function scopes only.
   int num_stack_slots_;
   int num_heap_slots_;
 
   // Serialized scopes support.
   Handle<SerializedScopeInfo> scope_info_;
   bool resolved() { return !scope_info_.is_null(); }
 
   // Create a non-local variable with a given name.
   // These variables are looked up dynamically at runtime.
   Variable* NonLocal(Handle<String> name, Variable::Mode mode);
 
   // Variable resolution.
   Variable* LookupRecursive(Handle<String> name,
                             bool inner_lookup,
                             Variable** invalidated_local);
   void ResolveVariable(Scope* global_scope,
                        Handle<Context> context,
                        VariableProxy* proxy);
   void ResolveVariablesRecursively(Scope* global_scope,
                                    Handle<Context> context);
 
   // Scope analysis.
   bool PropagateScopeInfo(bool outer_scope_calls_eval,
+                          bool outer_scope_calls_non_strict_eval,
                           bool outer_scope_is_eval_scope);
   bool HasTrivialContext() const;
 
   // Predicates.
   bool MustAllocate(Variable* var);
   bool MustAllocateInContext(Variable* var);
   bool HasArgumentsParameter();
 
   // Variable allocation.
   void AllocateStackSlot(Variable* var);
@@ skipping 67 matching lines @@
   int nesting_level_;
   // Nesting level of outermost scope that is contained in a with statement,
   // or kNotInsideWith if there are no with's around the current scope.
   int inside_with_level_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCOPES_H_