[stubs] Introducing LoadICTFStub and LoadICTrampolineTFStub and a switch to enable them instead of …

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 {
 namespace internal {
 
 
 // static
 Callable CodeFactory::LoadIC(Isolate* isolate, TypeofMode typeof_mode) {
+  if (FLAG_tf_load_ic_stub) {
+    LoadICTrampolineTFStub stub(isolate, LoadICState(typeof_mode));
+    return Callable(stub.GetCode(), LoadDescriptor(isolate));
+  }
   LoadICTrampolineStub stub(isolate, LoadICState(typeof_mode));
   return Callable(stub.GetCode(), LoadDescriptor(isolate));
 }
 
 // static
 Callable CodeFactory::ApiGetter(Isolate* isolate) {
   CallApiGetterStub stub(isolate);
   return Callable(stub.GetCode(), ApiGetterDescriptor(isolate));
 }
 
@@ skipping 532 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