Infer whether a variable is assigned

src/scopes.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_SCOPES_H_
 #define V8_SCOPES_H_
 
 #include "src/ast.h"
 #include "src/zone.h"
 
@@ skipping 453 matching lines @@
   bool scope_calls_eval_;
   // The strict mode of this scope.
   StrictMode strict_mode_;
   // Source positions.
   int start_position_;
   int end_position_;
 
   // Computed via PropagateScopeInfo.
   bool outer_scope_calls_sloppy_eval_;
   bool inner_scope_calls_eval_;
+  bool inner_scope_contains_with_;
   bool force_eager_compilation_;
   bool force_context_allocation_;
 
   // True if it doesn't need scope resolution (e.g., if the scope was
   // constructed based on a serialized scope info or a catch context).
   bool already_resolved_;
 
   // Computed as variables are declared.
   int num_var_or_const_;
 
@@ skipping 57 matching lines @@
     //   The variable potentially references a property of the 'with' object.
     // * The code is being executed as part of a call to 'eval' and the calling
     //   context chain contains either a variable binding for the name or it
     //   contains a 'with' context.
     DYNAMIC_LOOKUP
   };
 
   // Lookup a variable reference given by name recursively starting with this
   // scope. If the code is executed because of a call to 'eval', the context
   // parameter should be set to the calling context of 'eval'.
-  Variable* LookupRecursive(Handle<String> name,
+  Variable* LookupRecursive(VariableProxy* proxy,
                             BindingKind* binding_kind,
                             AstNodeFactory<AstNullVisitor>* factory);
   MUST_USE_RESULT
   bool ResolveVariable(CompilationInfo* info,
                        VariableProxy* proxy,
                        AstNodeFactory<AstNullVisitor>* factory);
   MUST_USE_RESULT
   bool ResolveVariablesRecursively(CompilationInfo* info,
                                    AstNodeFactory<AstNullVisitor>* factory);
 
   // Scope analysis.
-  bool PropagateScopeInfo(bool outer_scope_calls_sloppy_eval);
+  void PropagateScopeInfo(bool outer_scope_calls_sloppy_eval);
   bool HasTrivialContext() const;
 
   // Predicates.
   bool MustAllocate(Variable* var);
   bool MustAllocateInContext(Variable* var);
   bool HasArgumentsParameter();
 
   // Variable allocation.
   void AllocateStackSlot(Variable* var);
   void AllocateHeapSlot(Variable* var);
@@ skipping 33 matching lines @@
   void SetDefaults(ScopeType type,
                    Scope* outer_scope,
                    Handle<ScopeInfo> scope_info);
 
   Zone* zone_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCOPES_H_