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

src/interface-descriptors.cc

 // 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.
 
 #include "src/interface-descriptors.h"
 
 namespace v8 {
 namespace internal {
 
 namespace {
@@ skipping 57 matching lines @@
     return #NAME " Descriptor";
     INTERFACE_DESCRIPTOR_LIST(DEF_CASE)
 #undef DEF_CASE
     case CallDescriptors::NUMBER_OF_DESCRIPTORS:
       break;
   }
   return "";
 }
 
 
-void AllocateMutableHeapNumberDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  data->InitializePlatformSpecific(0, nullptr, nullptr);
-}
-
-
 void VoidDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   data->InitializePlatformSpecific(0, nullptr);
 }
 
 FunctionType* LoadDescriptor::BuildCallInterfaceDescriptorFunctionType(
     Isolate* isolate, int paramater_count) {
   Zone* zone = isolate->interface_descriptor_zone();
   FunctionType* function =
       Type::Function(AnyTagged(zone), Type::Undefined(), 3, zone)->AsFunction();
@@ skipping 449 matching lines @@
       Type::Function(AnyTagged(zone), Type::Undefined(), 4, zone)->AsFunction();
   function->InitParameter(kAccumulatorParameter, AnyTagged(zone));
   function->InitParameter(kBytecodeOffsetParameter, UntaggedIntegral32(zone));
   function->InitParameter(kBytecodeArrayParameter, AnyTagged(zone));
   function->InitParameter(kDispatchTableParameter, AnyTagged(zone));
   return function;
 }
 
 }  // namespace internal
 }  // namespace v8