Only update POLYMORPHIC stubs using other POLYMORPHIC or GENERIC stubs.

src/ic.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 161 matching lines @@
                   Handle<Code> code);
   virtual void UpdateMegamorphicCache(Map* map, String* name, Code* code);
   virtual Handle<Code> megamorphic_stub() {
     UNREACHABLE();
     return Handle<Code>::null();
   }
   virtual Handle<Code> megamorphic_stub_strict() {
     UNREACHABLE();
     return Handle<Code>::null();
   }
+  virtual Handle<Code> generic_stub() const {
+    UNREACHABLE();
+    return Handle<Code>::null();
+  }
+  virtual Handle<Code> generic_stub_strict() const {
+    UNREACHABLE();
+    return Handle<Code>::null();
+  }
 
  private:
   // Frame pointer for the frame that uses (calls) the IC.
   Address fp_;
 
   // All access to the program counter of an IC structure is indirect
   // to make the code GC safe. This feature is crucial since
   // GetProperty and SetProperty are called and they in turn might
   // invoke the garbage collector.
   Address* pc_address_;
@@ skipping 610 matching lines @@
 
 // Helper for BinaryOpIC and CompareIC.
 enum InlinedSmiCheck { ENABLE_INLINED_SMI_CHECK, DISABLE_INLINED_SMI_CHECK };
 void PatchInlinedSmiCode(Address address, InlinedSmiCheck check);
 
 DECLARE_RUNTIME_FUNCTION(MaybeObject*, KeyedLoadIC_Miss);
 
 } }  // namespace v8::internal
 
 #endif  // V8_IC_H_