Replace ICStub for array.length with hydrogen stub

src/runtime.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 13009 matching lines @@
   ASSERT(args.length() == 2);
   OS::PrintError("abort: %s\n",
                  reinterpret_cast<char*>(args[0]) + args.smi_at(1));
   isolate->PrintStack();
   OS::Abort();
   UNREACHABLE();
   return NULL;
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_UnexpectedDeopt) {
+  ASSERT(args.length() == 0);
+  OS::PrintError("Unexpected deoptimization");
+  isolate->PrintStack();
+  OS::Abort();
+  UNREACHABLE();
+  return NULL;
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_FlattenString) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(String, str, 0);
   FlattenString(str);
   return isolate->heap()->undefined_value();
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFromCache) {
@@ skipping 376 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal