New hydrogen instruction to reduce cost of growing an array on keyed stores.

src/hydrogen-instructions.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/base/bits.h"
 #include "src/double.h"
 #include "src/factory.h"
 #include "src/hydrogen-infer-representation.h"
@@ skipping 856 matching lines @@
     case HValue::kDiv:
     case HValue::kForInCacheArray:
     case HValue::kForInPrepareMap:
     case HValue::kFunctionLiteral:
     case HValue::kInvokeFunction:
     case HValue::kLoadContextSlot:
     case HValue::kLoadFunctionPrototype:
     case HValue::kLoadKeyed:
     case HValue::kLoadKeyedGeneric:
     case HValue::kMathFloorOfDiv:
+    case HValue::kMaybeGrowElements:
     case HValue::kMod:
     case HValue::kMul:
     case HValue::kOsrEntry:
     case HValue::kPower:
     case HValue::kRor:
     case HValue::kSar:
     case HValue::kSeqStringSetChar:
     case HValue::kShl:
     case HValue::kShr:
     case HValue::kSimulate:
@@ skipping 3837 matching lines @@
       break;
     case HObjectAccess::kExternalMemory:
       os << "[external-memory]";
       break;
   }
 
   return os << "@" << access.offset();
 }
 
 } }  // namespace v8::internal