Adding a type vector to replace type cells.

src/compiler.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 85 matching lines @@
   }
   void MarkAsGlobal() {
     ASSERT(!is_lazy());
     flags_ |= IsGlobal::encode(true);
   }
   void set_parameter_count(int parameter_count) {
     ASSERT(IsStub());
     parameter_count_ = parameter_count;
   }
 
+  void set_feedback_slots(int feedback_slots) {
+    ASSERT(!IsStub());
+    ASSERT(feedback_slots_ == -1);  // Slots shouldn't yet be initialized.
+    feedback_slots_ = feedback_slots;
+  }
+  int feedback_slots() const {
+    ASSERT(feedback_slots_ >= 0);
+    return feedback_slots_;
+  }
+
   void set_this_has_uses(bool has_no_uses) {
     this_has_uses_ = has_no_uses;
   }
   bool this_has_uses() {
     return this_has_uses_;
   }
   void SetLanguageMode(LanguageMode language_mode) {
     ASSERT(this->language_mode() == CLASSIC_MODE ||
            this->language_mode() == language_mode ||
            language_mode == EXTENDED_MODE);
@@ skipping 325 matching lines @@
 
   List<OffsetRange>* no_frame_ranges_;
 
   // A copy of shared_info()->opt_count() to avoid handle deref
   // during graph optimization.
   int opt_count_;
 
   // Number of parameters used for compilation of stubs that require arguments.
   int parameter_count_;
 
+  // Number of feedback slots to allocate for a normal function.
+  int feedback_slots_;
+
   bool this_has_uses_;
 
   Handle<Foreign> object_wrapper_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilationInfo);
 };
 
 
 // Exactly like a CompilationInfo, except also creates and enters a
 // Zone on construction and deallocates it on exit.
@@ skipping 215 matching lines @@
   unsigned info_zone_start_allocation_size_;
   ElapsedTimer timer_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilationPhase);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_COMPILER_H_