Fix warnings on Win64.

src/ic.cc

 // Copyright 2006-2009 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 108 matching lines @@
   ASSERT(Debug::HasDebugInfo(shared));
   Code* original_code = Debug::GetDebugInfo(shared)->original_code();
   ASSERT(original_code->IsCode());
   // Get the address of the call site in the active code. This is the
   // place where the call to DebugBreakXXX is and where the IC
   // normally would be.
   Address addr = pc() - Assembler::kCallTargetAddressOffset;
   // Return the address in the original code. This is the place where
   // the call which has been overwritten by the DebugBreakXXX resides
   // and the place where the inline cache system should look.
-  int delta = original_code->instruction_start() - code->instruction_start();
+  intptr_t delta =
+      original_code->instruction_start() - code->instruction_start();
   return addr + delta;
 }
 #endif
 
 IC::State IC::StateFrom(Code* target, Object* receiver) {
   IC::State state = target->ic_state();
 
   if (state != MONOMORPHIC) return state;
   if (receiver->IsUndefined() || receiver->IsNull()) return state;
 
@@ skipping 1284 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal