Add optimized compiler support for generic global loads....

src/hydrogen.h

 // Copyright 2011 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 427 matching lines @@
   // have already been inserted in the instruction stream (or not need to
   // be, e.g., HPhi).  Call this function in tail position in the Visit
   // functions for expressions.
   virtual void ReturnValue(HValue* value) = 0;
 
   // Add a hydrogen instruction to the instruction stream (recording an
   // environment simulation if necessary) and then fill this context with
   // the instruction as value.
   virtual void ReturnInstruction(HInstruction* instr, int ast_id) = 0;
 
+  virtual bool IsTypeof() { return false; }
+
  protected:
   AstContext(HGraphBuilder* owner, Expression::Context kind);
   virtual ~AstContext();
 
   HGraphBuilder* owner() const { return owner_; }
 
   // We want to be able to assert, in a context-specific way, that the stack
   // height makes sense when the context is filled.
 #ifdef DEBUG
   int original_length_;
@@ skipping 14 matching lines @@
   virtual ~EffectContext();
 
   virtual void ReturnValue(HValue* value);
   virtual void ReturnInstruction(HInstruction* instr, int ast_id);
 };
 
 
 class ValueContext: public AstContext {
  public:
   explicit ValueContext(HGraphBuilder* owner)
-      : AstContext(owner, Expression::kValue) {
+      : AstContext(owner, Expression::kValue), is_typeof_(false) {
   }
   virtual ~ValueContext();
 
   virtual void ReturnValue(HValue* value);
   virtual void ReturnInstruction(HInstruction* instr, int ast_id);
+  virtual bool IsTypeof() { return is_typeof_; }
+  void MarkAsTypeof() { is_typeof_ = true; }
+
+ private:
+  bool is_typeof_;
 };
 
 
 class TestContext: public AstContext {
  public:
   TestContext(HGraphBuilder* owner,
               HBasicBlock* if_true,
               HBasicBlock* if_false)
       : AstContext(owner, Expression::kTest),
         if_true_(if_true),
@@ skipping 222 matching lines @@
 
   HBasicBlock* JoinContinue(IterationStatement* statement,
                             HBasicBlock* exit_block,
                             HBasicBlock* continue_block);
 
   HValue* Top() const { return environment()->Top(); }
   void Drop(int n) { environment()->Drop(n); }
   void Bind(Variable* var, HValue* value) { environment()->Bind(var, value); }
 
   void VisitForValue(Expression* expr);
+  void VisitForTypeofValue(Expression* expr);
   void VisitForEffect(Expression* expr);
   void VisitForControl(Expression* expr,
                        HBasicBlock* true_block,
                        HBasicBlock* false_block);
 
   // Visit an argument subexpression and emit a push to the outgoing
   // arguments.
   void VisitArgument(Expression* expr);
   void VisitArgumentList(ZoneList<Expression*>* arguments);
 
@@ skipping 15 matching lines @@
   virtual void VisitStatements(ZoneList<Statement*>* statements);
 
 #define DECLARE_VISIT(type) virtual void Visit##type(type* node);
   AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT
 
   HBasicBlock* CreateBasicBlock(HEnvironment* env);
   HBasicBlock* CreateLoopHeaderBlock();
 
   // Helpers for flow graph construction.
-  void LookupGlobalPropertyCell(Variable* var,
+  bool LookupGlobalPropertyCell(Variable* var,
                                 LookupResult* lookup,
                                 bool is_store);
 
   bool TryArgumentsAccess(Property* expr);
   bool TryCallApply(Call* expr);
   bool TryInline(Call* expr);
   bool TryInlineBuiltinFunction(Call* expr,
                                 HValue* receiver,
                                 Handle<Map> receiver_map,
                                 CheckType check_type);
@@ skipping 318 matching lines @@
   const char* filename_;
   HeapStringAllocator string_allocator_;
   StringStream trace_;
   int indent_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_