Keep new arrays allocated with 'new Array(N)' in fast mode

src/runtime.h

 // 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.
 
 #ifndef V8_RUNTIME_H_
 #define V8_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/zone.h"
 
@@ skipping 422 matching lines @@
                                            \
   /* Harmony generators */                 \
   F(CreateJSGeneratorObject, 0, 1)         \
   F(SuspendJSGeneratorObject, 1, 1)        \
   F(ResumeJSGeneratorObject, 3, 1)         \
   F(ThrowGeneratorStateError, 1, 1)        \
                                            \
   /* Arrays */                             \
   F(ArrayConstructor, -1, 1)               \
   F(InternalArrayConstructor, -1, 1)       \
+  F(NormalizeElements, 1, 1)               \
                                            \
   /* Literals */                           \
   F(MaterializeRegExpLiteral, 4, 1)        \
   F(CreateObjectLiteral, 4, 1)             \
   F(CreateArrayLiteral, 4, 1)              \
   F(CreateArrayLiteralStubBailout, 3, 1)   \
                                            \
   /* Statements */                         \
   F(NewClosure, 3, 1)                      \
   F(NewClosureFromStubFailure, 1, 1)       \
@@ skipping 435 matching lines @@
 class AllocateDoubleAlignFlag:  public BitField<bool,            0, 1> {};
 class AllocateTargetSpace:      public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag:   public BitField<bool,       0, 1> {};
 class DeclareGlobalsNativeFlag: public BitField<bool,       1, 1> {};
 class DeclareGlobalsStrictMode: public BitField<StrictMode, 2, 1> {};
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_