[stubs] Introduce a dedicated FastNewObjectStub.

src/bailout-reason.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_BAILOUT_REASON_H_
 #define V8_BAILOUT_REASON_H_
 
 namespace v8 {
 namespace internal {
 
@@ skipping 130 matching lines @@
   V(kNotEnoughSpillSlotsForOsr, "Not enough spill slots for OSR")              \
   V(kNotEnoughVirtualRegistersRegalloc,                                        \
     "Not enough virtual registers (regalloc)")                                 \
   V(kObjectFoundInSmiOnlyArray, "Object found in smi-only array")              \
   V(kObjectLiteralWithComplexProperty, "Object literal with complex property") \
   V(kOffsetOutOfRange, "Offset out of range")                                  \
   V(kOperandIsASmiAndNotABoundFunction,                                        \
     "Operand is a smi and not a bound function")                               \
   V(kOperandIsASmiAndNotAFunction, "Operand is a smi and not a function")      \
   V(kOperandIsASmiAndNotAName, "Operand is a smi and not a name")              \
+  V(kOperandIsASmiAndNotAReceiver, "Operand is a smi and not a receiver")      \

[Yang, 2016/02/19 06:51:08]

Imo we don't need to distinguish this case and the one added below.

[Benedikt Meurer, 2016/02/19 06:54:05]

Well, I just followed the approach in the surrounding code. If we want to clean
this up, we should do all of the Assert*'s at once.

   V(kOperandIsASmiAndNotAString, "Operand is a smi and not a string")          \
   V(kOperandIsASmi, "Operand is a smi")                                        \
   V(kOperandIsNotADate, "Operand is not a date")                               \
   V(kOperandIsNotABoundFunction, "Operand is not a bound function")            \
   V(kOperandIsNotAFunction, "Operand is not a function")                       \
   V(kOperandIsNotAName, "Operand is not a name")                               \
   V(kOperandIsNotANumber, "Operand is not a number")                           \
+  V(kOperandIsNotAReceiver, "Operand is not a receiver")                       \
   V(kOperandIsNotASmi, "Operand is not a smi")                                 \
   V(kOperandIsNotAString, "Operand is not a string")                           \
   V(kOperandIsNotSmi, "Operand is not smi")                                    \
   V(kOperandNotANumber, "Operand not a number")                                \
   V(kObjectTagged, "The object is tagged")                                     \
   V(kObjectNotTagged, "The object is not tagged")                              \
   V(kOptimizationDisabled, "Optimization is disabled")                         \
   V(kOptimizedTooManyTimes, "Optimized too many times")                        \
   V(kOutOfVirtualRegistersWhileTryingToAllocateTempRegister,                   \
     "Out of virtual registers while trying to allocate temp register")         \
@@ skipping 105 matching lines @@
 };
 #undef ERROR_MESSAGES_CONSTANTS
 
 
 const char* GetBailoutReason(BailoutReason reason);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BAILOUT_REASON_H_