[turbofan] Run everything after representation selection concurrently.

src/code-stubs.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/code-stubs.h"
 
 #include <sstream>
 
 #include "src/bootstrapper.h"
 #include "src/code-factory.h"
@@ skipping 3988 matching lines @@
 
 #define SIMD128_INIT_DESC(TYPE, Type, type, lane_count, lane_type) \
   void Allocate##Type##Stub::InitializeDescriptor(                 \
       CodeStubDescriptor* descriptor) {                            \
     descriptor->Initialize(                                        \
         Runtime::FunctionForId(Runtime::kCreate##Type)->entry);    \
   }
 SIMD128_TYPES(SIMD128_INIT_DESC)
 #undef SIMD128_INIT_DESC
 
-void AllocateStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {
-  descriptor->Initialize();
-}
-
 void ToBooleanICStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {
   descriptor->Initialize(FUNCTION_ADDR(Runtime_ToBooleanIC_Miss));
   descriptor->SetMissHandler(ExternalReference(
       Runtime::FunctionForId(Runtime::kToBooleanIC_Miss), isolate()));
 }
 
 
 void BinaryOpICStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {
   descriptor->Initialize(FUNCTION_ADDR(Runtime_BinaryOpIC_Miss));
   descriptor->SetMissHandler(ExternalReference(
@@ skipping 223 matching lines @@
   if (type->Is(Type::UntaggedPointer())) {
     return Representation::External();
   }
 
   DCHECK(!type->Is(Type::Untagged()));
   return Representation::Tagged();
 }
 
 }  // namespace internal
 }  // namespace v8