Reuse the nonexistent handler frontend for transition handlers

src/x64/stub-cache-x64.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/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/arguments.h"
 #include "src/codegen.h"
@@ skipping 349 matching lines @@
 
 void NamedStoreHandlerCompiler::GenerateRestoreName(Label* label,
                                                     Handle<Name> name) {
   if (!label->is_unused()) {
     __ bind(label);
     __ Move(this->name(), name);
   }
 }
 
 
-void NamedStoreHandlerCompiler::GenerateNegativeHolderLookup(
-    Register holder_reg, Handle<Name> name, Label* miss) {
-  if (holder()->IsJSGlobalObject()) {
-    GenerateCheckPropertyCell(masm(), Handle<JSGlobalObject>::cast(holder()),
-                              name, scratch1(), miss);
-  } else if (!holder()->HasFastProperties()) {
-    GenerateDictionaryNegativeLookup(masm(), miss, holder_reg, name, scratch1(),
-                                     scratch2());
-  }
-}
-
-
 // Receiver_reg is preserved on jumps to miss_label, but may be destroyed if
 // store is successful.
 void NamedStoreHandlerCompiler::GenerateStoreTransition(
     Handle<Map> transition, Handle<Name> name, Register receiver_reg,
     Register storage_reg, Register value_reg, Register scratch1,
     Register scratch2, Register unused, Label* miss_label, Label* slow) {
   int descriptor = transition->LastAdded();
   DescriptorArray* descriptors = transition->instance_descriptors();
   PropertyDetails details = descriptors->GetDetails(descriptor);
   Representation representation = details.representation();
@@ skipping 682 matching lines @@
 
   __ bind(&miss);
 
   TailCallBuiltin(masm(), MissBuiltin(kind()));
 
   // Return the generated code.
   return GetCode(kind(), Code::NORMAL, factory()->empty_string(), POLYMORPHIC);
 }
 
 
-Handle<Code> NamedLoadHandlerCompiler::CompileLoadNonexistent(
-    Handle<Name> name) {
-  NonexistentFrontend(name);
-
-  // Return undefined if maps of the full prototype chain are still the
-  // same and no global property with this name contains a value.
-  __ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
-  __ ret(0);
-
-  // Return the generated code.
-  return GetCode(kind(), Code::FAST, name);
-}
-
-
 Register* PropertyAccessCompiler::load_calling_convention() {
   // receiver, name, scratch1, scratch2, scratch3, scratch4.
   Register receiver = LoadIC::ReceiverRegister();
   Register name = LoadIC::NameRegister();
   static Register registers[] = { receiver, name, rax, rbx, rdi, r8 };
   return registers;
 }
 
 
 Register* PropertyAccessCompiler::store_calling_convention() {
@@ skipping 185 matching lines @@
   // -----------------------------------
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64