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

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index ce903d39958f5e8d0946a62a2f4b36c914bf9985..e945a13c8788df96de7bf578fab5957ccd6f1d75 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -2994,13 +2994,14 @@ void LCodeGen::DoLoadGlobalCell(LLoadGlobalCell* instr) {
 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(r0));
-  __ mov(VectorLoadICDescriptor::SlotRegister(),
-         Operand(Smi::FromInt(instr->hydrogen()->slot().ToInt())));
+  int index = vector->GetIndex(instr->hydrogen()->slot());
+  __ mov(VectorLoadICDescriptor::SlotRegister(), Operand(Smi::FromInt(index)));
 }