arrange to create prototypes for generators

src/code-stubs.h

 // Copyright 2012 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 375 matching lines @@
   void Generate(MacroAssembler* masm);
 
  private:
   Major MajorKey() { return ToNumber; }
   int MinorKey() { return 0; }
 };
 
 
 class FastNewClosureStub : public PlatformCodeStub {
  public:
-  explicit FastNewClosureStub(LanguageMode language_mode)
-    : language_mode_(language_mode) { }
+  explicit FastNewClosureStub(LanguageMode language_mode, bool is_generator)
+    : language_mode_(language_mode),
+      is_generator_(is_generator) { }
 
   void Generate(MacroAssembler* masm);
 
  private:
+  class StrictModeBits: public BitField<bool, 0, 1> {};
+  class IsGeneratorBits: public BitField<bool, 1, 1> {};
+
   Major MajorKey() { return FastNewClosure; }
-  int MinorKey() { return language_mode_ == CLASSIC_MODE
-        ? kNonStrictMode : kStrictMode; }
+  int MinorKey() {
+    return StrictModeBits::encode(language_mode_ != CLASSIC_MODE) |
+      IsGeneratorBits::encode(is_generator_);
+  }
 
   LanguageMode language_mode_;
+  bool is_generator_;
 };
 
 
 class FastNewContextStub : public PlatformCodeStub {
  public:
   static const int kMaximumSlots = 64;
 
   explicit FastNewContextStub(int slots) : slots_(slots) {
     ASSERT(slots_ > 0 && slots_ <= kMaximumSlots);
   }
@@ skipping 1233 matching lines @@
 
   // The current function entry hook.
   static FunctionEntryHook entry_hook_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileEntryHookStub);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_