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

src/x87/code-stubs-x87.cc

Index: src/x87/code-stubs-x87.cc
diff --git a/src/x87/code-stubs-x87.cc b/src/x87/code-stubs-x87.cc
index e0cc2c0f50a9d5ed4ff9c19fe1e76f336bef7822..9ff6a007aa6fe19b4555f645ebd81cc22af2544c 100644
--- a/src/x87/code-stubs-x87.cc
+++ b/src/x87/code-stubs-x87.cc
@@ -3297,10 +3297,8 @@ void LoadICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) {
   __ j(not_equal, &miss);
   __ push(slot);
   __ push(vector);
-  Code::Flags code_flags =
-      Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::LOAD_IC));
-  masm->isolate()->stub_cache()->GenerateProbe(masm, Code::LOAD_IC, code_flags,
-                                               receiver, name, vector, scratch);
+  masm->isolate()->load_stub_cache()->GenerateProbe(masm, receiver, name,
+                                                    vector, scratch);
   __ pop(vector);
   __ pop(slot);
 
@@ -3558,10 +3556,8 @@ void VectorStoreICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) {
   __ pop(value);
   __ push(slot);
   __ push(vector);
-  Code::Flags code_flags =
-      Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::STORE_IC));
-  masm->isolate()->stub_cache()->GenerateProbe(masm, Code::STORE_IC, code_flags,
-                                               receiver, key, slot, no_reg);
+  masm->isolate()->store_stub_cache()->GenerateProbe(masm, receiver, key, slot,
+                                                     no_reg);
   __ pop(vector);
   __ pop(slot);
   Label no_pop_miss;