Introduce TypeFeedbackVector, as FixedArray grew constrictive.

src/compiler.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/compiler.h"
 
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 156 matching lines @@
 
   if (!shared_info_.is_null()) {
     DCHECK(strict_mode() == SLOPPY);
     SetStrictMode(shared_info_->strict_mode());
   }
   set_bailout_reason(kUnknown);
 
   if (!shared_info().is_null() && shared_info()->is_compiled()) {
     // We should initialize the CompilationInfo feedback vector from the
     // passed in shared info, rather than creating a new one.
-    feedback_vector_ = Handle<FixedArray>(shared_info()->feedback_vector(),
-                                          isolate);
+    feedback_vector_ =
+        Handle<TypeFeedbackVector>(shared_info()->feedback_vector(), isolate);
   }
 }
 
 
 CompilationInfo::~CompilationInfo() {
   delete deferred_handles_;
   delete no_frame_ranges_;
   if (ast_value_factory_owned_) delete ast_value_factory_;
 #ifdef DEBUG
   // Check that no dependent maps have been added or added dependent maps have
@@ skipping 1232 matching lines @@
   AllowHandleDereference allow_deref;
   bool tracing_on = info()->IsStub()
       ? FLAG_trace_hydrogen_stubs
       : (FLAG_trace_hydrogen &&
          info()->closure()->PassesFilter(FLAG_trace_hydrogen_filter));
   return (tracing_on &&
       base::OS::StrChr(const_cast<char*>(FLAG_trace_phase), name_[0]) != NULL);
 }
 
 } }  // namespace v8::internal