Introduce FeedbackVectorSlot type - better than int.

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 3359 matching lines @@
 
 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());
   // No need to allocate this register.
   DCHECK(VectorLoadICDescriptor::SlotRegister().is(x0));
   __ Mov(VectorLoadICDescriptor::SlotRegister(),
-         Smi::FromInt(instr->hydrogen()->slot()));
+         Smi::FromInt(instr->hydrogen()->slot().ToInt()));
 }
 
 
 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