Avoid one repeated property lookup when computing store ICs.

src/runtime.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 <stdlib.h>
 #include <limits>
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 10863 matching lines @@
   isolate->stack_guard()->RequestDebugBreak();
   return isolate->heap()->undefined_value();
 }
 
 
 static Handle<Object> DebugLookupResultValue(LookupIterator* it,
                                              bool* has_caught = NULL) {
   for (; it->IsFound(); it->Next()) {
     switch (it->state()) {
       case LookupIterator::NOT_FOUND:
+      case LookupIterator::TRANSITION:
         UNREACHABLE();
       case LookupIterator::ACCESS_CHECK:
         // Ignore access checks.
         break;
       case LookupIterator::INTERCEPTOR:
       case LookupIterator::JSPROXY:
         return it->isolate()->factory()->undefined_value();
       case LookupIterator::PROPERTY:
         if (!it->HasProperty()) continue;
         switch (it->property_kind()) {
@@ skipping 4730 matching lines @@
   }
   return NULL;
 }
 
 
 const Runtime::Function* Runtime::FunctionForId(Runtime::FunctionId id) {
   return &(kIntrinsicFunctions[static_cast<int>(id)]);
 }
 
 } }  // namespace v8::internal