PPC: VectorICs: refactoring to eliminate "for queries only" vector ic mode.

Port 1a5751f9

Original commit message:
    Since we need the notion of a dummy vector ic, we can use that to avoid
    a special case of the IC constructor. Also, consolidate the two dummy
    ICs into one.

R=mvstanton@chromium.org, michael_dawson@ca.ibm.com, jyan@ca.ibm.com, joransiu@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1261433007

Cr-Commit-Position: refs/heads/master@{#29959}

src/ic/ppc/ic-ppc.cc

@@ -441,10 +441,11 @@ void KeyedLoadIC::GenerateMegamorphic(MacroAssembler* masm,
   Register vector = LoadWithVectorDescriptor::VectorRegister();
   Register slot = LoadWithVectorDescriptor::SlotRegister();
   DCHECK(!AreAliased(vector, slot, r7, r8, r9, r10));
-  Handle<TypeFeedbackVector> dummy_vector = Handle<TypeFeedbackVector>::cast(
-      masm->isolate()->factory()->keyed_load_dummy_vector());
-  int slot_index = dummy_vector->GetIndex(FeedbackVectorICSlot(0));
-  __ LoadRoot(vector, Heap::kKeyedLoadDummyVectorRootIndex);
+  Handle<TypeFeedbackVector> dummy_vector =
+      TypeFeedbackVector::DummyVector(masm->isolate());
+  int slot_index = dummy_vector->GetIndex(
+      FeedbackVectorICSlot(TypeFeedbackVector::kDummyKeyedLoadICSlot));
+  __ LoadRoot(vector, Heap::kDummyVectorRootIndex);
   __ LoadSmiLiteral(slot, Smi::FromInt(slot_index));
 
   Code::Flags flags = Code::RemoveTypeAndHolderFromFlags(
@@ -713,10 +714,11 @@ void KeyedStoreIC::GenerateMegamorphic(MacroAssembler* masm,
     Register vector = VectorStoreICDescriptor::VectorRegister();
     Register slot = VectorStoreICDescriptor::SlotRegister();
     DCHECK(!AreAliased(vector, slot, r6, r7, r8, r9));
-    Handle<TypeFeedbackVector> dummy_vector = Handle<TypeFeedbackVector>::cast(
-        masm->isolate()->factory()->keyed_store_dummy_vector());
-    int slot_index = dummy_vector->GetIndex(FeedbackVectorICSlot(0));
-    __ LoadRoot(vector, Heap::kKeyedStoreDummyVectorRootIndex);
+    Handle<TypeFeedbackVector> dummy_vector =
+        TypeFeedbackVector::DummyVector(masm->isolate());
+    int slot_index = dummy_vector->GetIndex(
+        FeedbackVectorICSlot(TypeFeedbackVector::kDummyKeyedStoreICSlot));
+    __ LoadRoot(vector, Heap::kDummyVectorRootIndex);
     __ LoadSmiLiteral(slot, Smi::FromInt(slot_index));
   }
 

src/ppc/builtins-ppc.cc

@@ -1478,7 +1478,8 @@ static void Generate_PushAppliedArguments(MacroAssembler* masm,
   __ LoadP(receiver, MemOperand(fp, argumentsOffset));
 
   // Use inline caching to speed up access to arguments.
-  FeedbackVectorSpec spec(0, Code::KEYED_LOAD_IC);
+  Code::Kind kinds[] = {Code::KEYED_LOAD_IC};
+  FeedbackVectorSpec spec(0, 1, kinds);
   Handle<TypeFeedbackVector> feedback_vector =
       masm->isolate()->factory()->NewTypeFeedbackVector(&spec);
   int index = feedback_vector->GetIndex(FeedbackVectorICSlot(0));