Encapsulate megamorphic load/tail-call in hydrogen

src/ic/x64/ic-x64.cc

Index: src/ic/x64/ic-x64.cc
diff --git a/src/ic/x64/ic-x64.cc b/src/ic/x64/ic-x64.cc
index b242c1dbcd23813c36d938686a9e20bbc2900db3..84667696f11764326bbef80df967762fb3a9c2bf 100644
--- a/src/ic/x64/ic-x64.cc
+++ b/src/ic/x64/ic-x64.cc
@@ -823,23 +823,6 @@ void KeyedStoreIC::GenerateSloppyArguments(MacroAssembler* masm) {
 }
 
 
-void LoadIC::GenerateMegamorphic(MacroAssembler* masm) {
-  // The return address is on the stack.
-  Register receiver = LoadDescriptor::ReceiverRegister();
-  Register name = LoadDescriptor::NameRegister();
-  DCHECK(receiver.is(rdx));
-  DCHECK(name.is(rcx));
-
-  // Probe the stub cache.
-  Code::Flags flags = Code::RemoveTypeAndHolderFromFlags(
-      Code::ComputeHandlerFlags(Code::LOAD_IC));
-  masm->isolate()->stub_cache()->GenerateProbe(masm, flags, receiver, name, rbx,
-                                               rax);
-
-  GenerateMiss(masm);
-}
-
-
 void LoadIC::GenerateNormal(MacroAssembler* masm) {
   Register dictionary = rax;
   DCHECK(!dictionary.is(LoadDescriptor::ReceiverRegister()));
@@ -934,7 +917,7 @@ void StoreIC::GenerateMegamorphic(MacroAssembler* masm) {
   Code::Flags flags = Code::RemoveTypeAndHolderFromFlags(
       Code::ComputeHandlerFlags(Code::STORE_IC));
   masm->isolate()->stub_cache()->GenerateProbe(
-      masm, flags, StoreDescriptor::ReceiverRegister(),
+      masm, flags, false, StoreDescriptor::ReceiverRegister(),
       StoreDescriptor::NameRegister(), rbx, no_reg);
 
   // Cache miss: Jump to runtime.