[turbofan] Initial version of allocation folding and write barrier elimination.

src/code-factory.cc

 // 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.
 
 #include "src/code-factory.h"
 
 #include "src/bootstrapper.h"
 #include "src/ic/ic.h"
 
 namespace v8 {
@@ skipping 481 matching lines @@
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
 }
 
 
 // static
 Callable CodeFactory::AllocateHeapNumber(Isolate* isolate) {
   AllocateHeapNumberStub stub(isolate);
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
 }
 
-
-// static
-Callable CodeFactory::AllocateMutableHeapNumber(Isolate* isolate) {
-  AllocateMutableHeapNumberStub stub(isolate);
-  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
-}
-
 #define SIMD128_ALLOC(TYPE, Type, type, lane_count, lane_type)          \
   Callable CodeFactory::Allocate##Type(Isolate* isolate) {              \
     Allocate##Type##Stub stub(isolate);                                 \
     return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor()); \
   }
 SIMD128_TYPES(SIMD128_ALLOC)
 #undef SIMD128_ALLOC
 
 // static
 Callable CodeFactory::ArgumentAdaptor(Isolate* isolate) {
@@ skipping 55 matching lines @@
 // static
 Callable CodeFactory::InterpreterCEntry(Isolate* isolate, int result_size) {
   // Note: If we ever use fpregs in the interpreter then we will need to
   // save fpregs too.
   CEntryStub stub(isolate, result_size, kDontSaveFPRegs, kArgvInRegister);
   return Callable(stub.GetCode(), InterpreterCEntryDescriptor(isolate));
 }
 
 }  // namespace internal
 }  // namespace v8