vector-based ICs did not update type feedback counts correctly.

src/x64/lithium-codegen-x64.cc

 // Copyright 2013 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"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 2832 matching lines @@
   if (instr->hydrogen()->RequiresHoleCheck()) {
     __ CompareRoot(result, Heap::kTheHoleValueRootIndex);
     DeoptimizeIf(equal, instr, "hole");
   }
 }
 
 
 template <class T>
 void LCodeGen::EmitVectorLoadICRegisters(T* instr) {
   DCHECK(FLAG_vector_ics);
-  Register vector = ToRegister(instr->temp_vector());
-  DCHECK(vector.is(VectorLoadICDescriptor::VectorRegister()));
-  __ Move(vector, instr->hydrogen()->feedback_vector());
+  Register vector_register = ToRegister(instr->temp_vector());
+  DCHECK(vector_register.is(VectorLoadICDescriptor::VectorRegister()));
+  Handle<TypeFeedbackVector> vector = instr->hydrogen()->feedback_vector();
+  __ Move(vector_register, vector);
   // No need to allocate this register.
   DCHECK(VectorLoadICDescriptor::SlotRegister().is(rax));
-  __ Move(VectorLoadICDescriptor::SlotRegister(),
-          Smi::FromInt(instr->hydrogen()->slot().ToInt()));
+  int index = vector->GetIndex(instr->hydrogen()->slot());
+  __ Move(VectorLoadICDescriptor::SlotRegister(), Smi::FromInt(index));
 }
 
 
 void LCodeGen::DoLoadGlobalGeneric(LLoadGlobalGeneric* instr) {
   DCHECK(ToRegister(instr->context()).is(rsi));
   DCHECK(ToRegister(instr->global_object())
              .is(LoadDescriptor::ReceiverRegister()));
   DCHECK(ToRegister(instr->result()).is(rax));
 
   __ Move(LoadDescriptor::NameRegister(), instr->name());
@@ skipping 3011 matching lines @@
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64