Fix null-dereference in r23716.

src/ic/ic.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/arguments.h"
 #include "src/base/bits.h"
@@ skipping 2741 matching lines @@
     case CompareIC::KNOWN_OBJECT:
       return map.is_null() ? Type::Receiver(zone) : Type::Class(map, zone);
     case CompareIC::GENERIC:
       return Type::Any(zone);
   }
   UNREACHABLE();
   return NULL;
 }
 
 
-void CompareIC::StubInfoToType(uint32_t stub_key, Type** left_type,
-                               Type** right_type, Type** overall_type,
-                               Handle<Map> map, Zone* zone) {
-  CompareICStub stub(stub_key, map->GetIsolate());
-  *left_type = StateToType(zone, stub.left());
-  *right_type = StateToType(zone, stub.right());
-  *overall_type = StateToType(zone, stub.state(), map);
-}
-
-
 CompareIC::State CompareIC::NewInputState(State old_state,
                                           Handle<Object> value) {
   switch (old_state) {
     case UNINITIALIZED:
       if (value->IsSmi()) return SMI;
       if (value->IsHeapNumber()) return NUMBER;
       if (value->IsInternalizedString()) return INTERNALIZED_STRING;
       if (value->IsString()) return STRING;
       if (value->IsSymbol()) return UNIQUE_NAME;
       if (value->IsJSObject()) return OBJECT;
@@ skipping 433 matching lines @@
 static const Address IC_utilities[] = {
 #define ADDR(name) FUNCTION_ADDR(name),
     IC_UTIL_LIST(ADDR) NULL
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) { return IC_utilities[id]; }
 }
 }  // namespace v8::internal