[ic] Split megamorphic stub cache in two caches (for loads and for stores).

src/ic/arm/ic-arm.cc

Index: src/ic/arm/ic-arm.cc
diff --git a/src/ic/arm/ic-arm.cc b/src/ic/arm/ic-arm.cc
index f3af78581bf746db1003e1c30928598f26363a9f..d9aa1a429bc845bb6f502f65febc98fcf8d9d37b 100644
--- a/src/ic/arm/ic-arm.cc
+++ b/src/ic/arm/ic-arm.cc
@@ -415,10 +415,8 @@ void KeyedLoadIC::GenerateMegamorphic(MacroAssembler* masm) {
   __ LoadRoot(vector, Heap::kDummyVectorRootIndex);
   __ mov(slot, Operand(Smi::FromInt(slot_index)));
 
-  Code::Flags flags =
-      Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::LOAD_IC));
-  masm->isolate()->stub_cache()->GenerateProbe(masm, Code::KEYED_LOAD_IC, flags,
-                                               receiver, key, r4, r5, r6, r9);
+  masm->isolate()->load_stub_cache()->GenerateProbe(masm, receiver, key, r4, r5,
+                                                    r6, r9);
   // Cache miss.
   GenerateMiss(masm);
 
@@ -682,10 +680,8 @@ void KeyedStoreIC::GenerateMegamorphic(MacroAssembler* masm,
   __ LoadRoot(vector, Heap::kDummyVectorRootIndex);
   __ mov(slot, Operand(Smi::FromInt(slot_index)));
 
-  Code::Flags flags =
-      Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::STORE_IC));
-  masm->isolate()->stub_cache()->GenerateProbe(
-      masm, Code::KEYED_STORE_IC, flags, receiver, key, r5, temporary2, r6, r9);
+  masm->isolate()->store_stub_cache()->GenerateProbe(masm, receiver, key, r5,
+                                                     temporary2, r6, r9);
   // Cache miss.
   __ b(&miss);