[stubs] Drop CallApiCallbackStub::call_data_undefined optimization.

src/ic/arm64/handler-compiler-arm64.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.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/ic/handler-compiler.h"
 
 #include "src/api-arguments.h"
 #include "src/arm64/assembler-arm64-inl.h"
@@ skipping 138 matching lines @@
         __ Ldr(holder, FieldMemOperand(holder, Map::kPrototypeOffset));
       }
       break;
     case CallOptimization::kHolderNotFound:
       UNREACHABLE();
       break;
   }
 
   Isolate* isolate = masm->isolate();
   Handle<CallHandlerInfo> api_call_info = optimization.api_call_info();
-  bool call_data_undefined = false;
   // Put call data in place.
   if (api_call_info->data()->IsUndefined(isolate)) {
-    call_data_undefined = true;
     __ LoadRoot(data, Heap::kUndefinedValueRootIndex);
   } else {
     if (optimization.is_constant_call()) {
       __ Ldr(data,
              FieldMemOperand(callee, JSFunction::kSharedFunctionInfoOffset));
       __ Ldr(data,
              FieldMemOperand(data, SharedFunctionInfo::kFunctionDataOffset));
       __ Ldr(data,
              FieldMemOperand(data, FunctionTemplateInfo::kCallCodeOffset));
     } else {
       __ Ldr(data,
              FieldMemOperand(callee, FunctionTemplateInfo::kCallCodeOffset));
     }
     __ Ldr(data, FieldMemOperand(data, CallHandlerInfo::kDataOffset));
   }
 
   // Put api_function_address in place.
   Address function_address = v8::ToCData<Address>(api_call_info->callback());
   ApiFunction fun(function_address);
   ExternalReference ref = ExternalReference(
       &fun, ExternalReference::DIRECT_API_CALL, masm->isolate());
   __ Mov(api_function_address, ref);
 
   // Jump to stub.
-  CallApiCallbackStub stub(isolate, is_store, call_data_undefined,
-                           !optimization.is_constant_call());
+  CallApiCallbackStub stub(isolate, is_store, !optimization.is_constant_call());
   __ TailCallStub(&stub);
 }
 
 
 void NamedStoreHandlerCompiler::GenerateStoreViaSetter(
     MacroAssembler* masm, Handle<Map> map, Register receiver, Register holder,
     int accessor_index, int expected_arguments, Register scratch) {
   // ----------- S t a t e -------------
   //  -- lr    : return address
   // -----------------------------------
@@ skipping 233 matching lines @@
   // Return the generated code.
   return GetCode(kind(), name);
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_IA32