Allow miss in GENERIC keyed load/store.

src/ic.cc

 // 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 1325 matching lines @@
     case POLYMORPHIC:
       set_target(*code);
       break;
     case MONOMORPHIC:
       // Only move to megamorphic if the target changes.
       if (target() != *code) {
         set_target(*megamorphic_stub());
       }
       break;
     case MEGAMORPHIC:
+    case GENERIC:
     case DEBUG_STUB:
       break;
     case MONOMORPHIC_PROTOTYPE_FAILURE:
-    case GENERIC:
       UNREACHABLE();
       break;
   }
 
   TRACE_IC("KeyedLoadIC", name, state, target());
 }
 
 
 static bool StoreICableLookup(LookupResult* lookup) {
   // Bail out if we didn't find a result.
@@ skipping 757 matching lines @@
       break;
     case MONOMORPHIC:
       // Only move to megamorphic if the target changes.
       if (target() != *code) {
         set_target((strict_mode == kStrictMode)
                      ? *megamorphic_stub_strict()
                      : *megamorphic_stub());
       }
       break;
     case MEGAMORPHIC:
+    case GENERIC:
     case DEBUG_STUB:
       break;
     case MONOMORPHIC_PROTOTYPE_FAILURE:
-    case GENERIC:
       UNREACHABLE();
       break;
   }
 
   TRACE_IC("KeyedStoreIC", name, state, target());
 }
 
 
 #undef TRACE_IC
 
@@ skipping 736 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal