[turbofan] Add inlined Array.prototype.pop support.

src/type-cache.h

 // Copyright 2014 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_TYPE_CACHE_H_
 #define V8_TYPE_CACHE_H_
 
 #include "src/types.h"
 
 namespace v8 {
@@ skipping 20 matching lines @@
   Type* const kUint16 =
       CreateNative(CreateRange<uint16_t>(), Type::UntaggedIntegral16());
   Type* const kInt32 =
       CreateNative(Type::Signed32(), Type::UntaggedIntegral32());
   Type* const kUint32 =
       CreateNative(Type::Unsigned32(), Type::UntaggedIntegral32());
   Type* const kFloat32 = CreateNative(Type::Number(), Type::UntaggedFloat32());
   Type* const kFloat64 = CreateNative(Type::Number(), Type::UntaggedFloat64());
 
   Type* const kSmi = CreateNative(Type::SignedSmall(), Type::TaggedSigned());
+  Type* const kHoleySmi = Type::Union(kSmi, Type::Hole(), zone());
   Type* const kHeapNumber = CreateNative(Type::Number(), Type::TaggedPointer());
 
   Type* const kSingletonZero = CreateRange(0.0, 0.0);
   Type* const kSingletonOne = CreateRange(1.0, 1.0);
   Type* const kSingletonTen = CreateRange(10.0, 10.0);
   Type* const kSingletonMinusOne = CreateRange(-1.0, -1.0);
   Type* const kZeroOrUndefined =
       Type::Union(kSingletonZero, Type::Undefined(), zone());
   Type* const kTenOrUndefined =
       Type::Union(kSingletonTen, Type::Undefined(), zone());
@@ skipping 113 matching lines @@
     return Type::Range(min, max, zone());
   }
 
   Zone* zone() { return &zone_; }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TYPE_CACHE_H_