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

src/ppc/code-stubs-ppc.cc

Index: src/ppc/code-stubs-ppc.cc
diff --git a/src/ppc/code-stubs-ppc.cc b/src/ppc/code-stubs-ppc.cc
index b6cfec77b8b656f8173fef5c57847652ebbdd49d..b5d9f8b5b14796303806ca8d337102df23158bd3 100644
--- a/src/ppc/code-stubs-ppc.cc
+++ b/src/ppc/code-stubs-ppc.cc
@@ -3655,11 +3655,8 @@ void LoadICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) {
   __ bind(&not_array);
   __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex);
   __ bne(&miss);
-  Code::Flags code_flags =
-      Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::LOAD_IC));
-  masm->isolate()->stub_cache()->GenerateProbe(masm, Code::LOAD_IC, code_flags,
-                                               receiver, name, feedback,
-                                               receiver_map, scratch1, r10);
+  masm->isolate()->load_stub_cache()->GenerateProbe(
+      masm, receiver, name, feedback, receiver_map, scratch1, r10);
 
   __ bind(&miss);
   LoadIC::GenerateMiss(masm);
@@ -3800,11 +3797,8 @@ void VectorStoreICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) {
   __ bind(&not_array);
   __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex);
   __ bne(&miss);
-  Code::Flags code_flags =
-      Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::STORE_IC));
-  masm->isolate()->stub_cache()->GenerateProbe(
-      masm, Code::STORE_IC, code_flags, receiver, key, feedback, receiver_map,
-      scratch1, scratch2);
+  masm->isolate()->store_stub_cache()->GenerateProbe(
+      masm, receiver, key, feedback, receiver_map, scratch1, scratch2);
 
   __ bind(&miss);
   StoreIC::GenerateMiss(masm);