X87: Cache IC handlers on the prototype's map if possible

src/x87/ic-x87.cc

Index: src/x87/ic-x87.cc
diff --git a/src/x87/ic-x87.cc b/src/x87/ic-x87.cc
index 8bf3b65501ebe762411fb23416ef0265e798428b..5db259813f05855d37f1fc889c6f222558deaa71 100644
--- a/src/x87/ic-x87.cc
+++ b/src/x87/ic-x87.cc
@@ -893,7 +893,8 @@ void LoadIC::GenerateMegamorphic(MacroAssembler* masm) {
   ASSERT(name.is(ecx));
 
   // Probe the stub cache.
-  Code::Flags flags = Code::ComputeHandlerFlags(Code::LOAD_IC);
+  Code::Flags flags = Code::RemoveTypeAndHolderFromFlags(
+      Code::ComputeHandlerFlags(Code::LOAD_IC));
   masm->isolate()->stub_cache()->GenerateProbe(
       masm, flags, receiver, name, ebx, eax);
 
@@ -1009,7 +1010,8 @@ void KeyedLoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
 
 void StoreIC::GenerateMegamorphic(MacroAssembler* masm) {
   // Return address is on the stack.
-  Code::Flags flags = Code::ComputeHandlerFlags(Code::STORE_IC);
+  Code::Flags flags = Code::RemoveTypeAndHolderFromFlags(
+      Code::ComputeHandlerFlags(Code::STORE_IC));
   masm->isolate()->stub_cache()->GenerateProbe(
       masm, flags, ReceiverRegister(), NameRegister(),
       ebx, no_reg);