Reuse the nonexistent handler frontend for transition handlers

src/x87/stub-cache-x87.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_X87
 
 #include "src/codegen.h"
 #include "src/ic-inl.h"
@@ skipping 383 matching lines @@
     __ mov(scratch, Immediate(cell));
     __ cmp(FieldOperand(scratch, PropertyCell::kValueOffset),
            Immediate(the_hole));
   } else {
     __ cmp(Operand::ForCell(cell), Immediate(the_hole));
   }
   __ j(not_equal, miss);
 }
 
 
-void NamedStoreHandlerCompiler::GenerateNegativeHolderLookup(
-    MacroAssembler* masm, Handle<JSObject> holder, Register holder_reg,
-    Handle<Name> name, Label* miss) {
-  if (holder->IsJSGlobalObject()) {
-    GenerateCheckPropertyCell(
-        masm, Handle<JSGlobalObject>::cast(holder), name, scratch1(), miss);
-  } else if (!holder->HasFastProperties() && !holder->IsJSGlobalProxy()) {
-    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(
     MacroAssembler* masm, LookupResult* lookup, 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);
@@ skipping 734 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.
-  __ mov(eax, isolate()->factory()->undefined_value());
-  __ 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, ebx, eax, edi, no_reg };
   return registers;
 }
 
 
 Register* PropertyAccessCompiler::store_calling_convention() {
@@ skipping 186 matching lines @@
   // -----------------------------------
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X87