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

src/arm64/lithium-codegen-arm64.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"
 
 #include "src/arm64/lithium-codegen-arm64.h"
 #include "src/arm64/lithium-gap-resolver-arm64.h"
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 3353 matching lines @@
   __ Ldr(result, FieldMemOperand(result, Cell::kValueOffset));
   if (instr->hydrogen()->RequiresHoleCheck()) {
     DeoptimizeIfRoot(result, Heap::kTheHoleValueRootIndex, 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()));
-  __ Mov(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();
+  __ Mov(vector_register, vector);
   // No need to allocate this register.
   DCHECK(VectorLoadICDescriptor::SlotRegister().is(x0));
-  __ Mov(VectorLoadICDescriptor::SlotRegister(),
-         Smi::FromInt(instr->hydrogen()->slot().ToInt()));
+  int index = vector->GetIndex(instr->hydrogen()->slot());
+  __ Mov(VectorLoadICDescriptor::SlotRegister(), Smi::FromInt(index));
 }
 
 
 void LCodeGen::DoLoadGlobalGeneric(LLoadGlobalGeneric* instr) {
   DCHECK(ToRegister(instr->context()).is(cp));
   DCHECK(ToRegister(instr->global_object())
              .is(LoadDescriptor::ReceiverRegister()));
   DCHECK(ToRegister(instr->result()).Is(x0));
   __ Mov(LoadDescriptor::NameRegister(), Operand(instr->name()));
   if (FLAG_vector_ics) {
@@ skipping 2649 matching lines @@
   Handle<ScopeInfo> scope_info = instr->scope_info();
   __ Push(scope_info);
   __ Push(ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 
 } }  // namespace v8::internal