Fast compiler: Load globals variables directly from property cells....

src/fast-codegen.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 51 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(FastCodeGenSyntaxChecker);
 };
 
 
 class FastCodeGenerator: public AstVisitor {
  public:
   explicit FastCodeGenerator(MacroAssembler* masm) : masm_(masm), info_(NULL) {}
 
   static Handle<Code> MakeCode(CompilationInfo* info);
 
-  void Generate(CompilationInfo* info);
+  void Generate(CompilationInfo* compilation_info);
 
  private:
   MacroAssembler* masm() { return masm_; }
+  CompilationInfo* info() { return info_; }
   Label* bailout() { return &bailout_; }
 
-  bool has_receiver() { return !info_->receiver().is_null(); }
-  Handle<Object> receiver() { return info_->receiver(); }
-  bool has_this_properties() { return info_->has_this_properties(); }
   FunctionLiteral* function() { return info_->function(); }
   Scope* scope() { return info_->scope(); }
 
   // AST node visit functions.
 #define DECLARE_VISIT(type) virtual void Visit##type(type* node);
   AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT
 
   // Emit code to load the receiver from the stack into a given register.
   void EmitLoadReceiver(Register reg);
 
   // Emit code to check that the receiver has the same map as the
   // compile-time receiver.  Receiver is expected in {ia32-edx, x64-rdx,
   // arm-r1}.  Emit a branch to the (single) bailout label if check fails.
   void EmitReceiverMapCheck();
 
-  // Emit code to load a global variable value into {is32-eax, x64-rax,
-  // arm-r0}.  Register {ia32-edx, x64-rdx, arm-r1} is preserved if it is
-  // holding the receiver and {is32-ecx, x64-rcx, arm-r2} is always
-  // clobbered.
-  void EmitGlobalVariableLoad(Handle<String> name);
+  // Emit code to check that the global object has the same map as the
+  // global object seen at compile time.
+  void EmitGlobalMapCheck();
+
+  // Emit code to load a global variable directly from a global
+  // property cell into {ia32-eax, x64-rax, arm-r0}.
+  void EmitGlobalVariableLoad(Handle<Object> cell);
 
   // Emit a store to an own property of this.  The stored value is expected
   // in {ia32-eax, x64-rax, arm-r0} and the receiver in {is32-edx, x64-rdx,
   // arm-r1}.  Both are preserve.
   void EmitThisPropertyStore(Handle<String> name);
 
   MacroAssembler* masm_;
 
   CompilationInfo* info_;
 
   Label bailout_;
 
   DISALLOW_COPY_AND_ASSIGN(FastCodeGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FAST_CODEGEN_H_