Basic array capacity feedback via allocation sites.

src/runtime/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/objects.h"
 #include "src/zone.h"
@@ skipping 409 matching lines @@
   F(HasFixedInt16Elements, 1, 1)                       \
   F(HasFixedUint16Elements, 1, 1)                      \
   F(HasFixedInt32Elements, 1, 1)                       \
   F(HasFixedUint32Elements, 1, 1)                      \
   F(HasFixedFloat32Elements, 1, 1)                     \
   F(HasFixedFloat64Elements, 1, 1)                     \
   F(HasFastProperties, 1, 1)                           \
   F(TransitionElementsKind, 2, 1)                      \
   F(HaveSameMap, 2, 1)                                 \
   F(IsJSGlobalProxy, 1, 1)                             \
+  F(GetElementsCapacity, 1, 1)                         \
   F(ForInCacheArrayLength, 2, 1) /* TODO(turbofan): Only temporary */
 
 
 #define RUNTIME_FUNCTION_LIST_ALWAYS_3(F)                    \
   /* String and Regexp */                                    \
   F(NumberToStringRT, 1, 1)                                  \
   F(RegExpConstructResult, 3, 1)                             \
   F(RegExpExecRT, 4, 1)                                      \
   F(StringAdd, 2, 1)                                         \
   F(SubString, 3, 1)                                         \
@@ skipping 464 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_