[stubs] Drop CallApiCallbackStub::call_data_undefined optimization.

src/code-stubs.h

 // 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.
 
 #ifndef V8_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 809 matching lines @@
   DEFINE_CALL_INTERFACE_DESCRIPTOR(StoreWithVector);
   DEFINE_TURBOFAN_CODE_STUB(KeyedStoreSloppyArguments, TurboFanCodeStub);
 };
 
 class CallApiCallbackStub : public PlatformCodeStub {
  public:
   static const int kArgBits = 3;
   static const int kArgMax = (1 << kArgBits) - 1;
 
   // CallApiCallbackStub for regular setters and getters.
-  CallApiCallbackStub(Isolate* isolate, bool is_store, bool call_data_undefined,
-                      bool is_lazy)
-      : CallApiCallbackStub(isolate, is_store ? 1 : 0, is_store,
-                            call_data_undefined, is_lazy) {}
+  CallApiCallbackStub(Isolate* isolate, bool is_store, bool is_lazy)
+      : CallApiCallbackStub(isolate, is_store ? 1 : 0, is_store, is_lazy) {}
 
   // CallApiCallbackStub for callback functions.
-  CallApiCallbackStub(Isolate* isolate, int argc, bool call_data_undefined,
-                      bool is_lazy)
-      : CallApiCallbackStub(isolate, argc, false, call_data_undefined,
-                            is_lazy) {}
+  CallApiCallbackStub(Isolate* isolate, int argc, bool is_lazy)
+      : CallApiCallbackStub(isolate, argc, false, is_lazy) {}
 
  private:
-  CallApiCallbackStub(Isolate* isolate, int argc, bool is_store,
-                      bool call_data_undefined, bool is_lazy)
+  CallApiCallbackStub(Isolate* isolate, int argc, bool is_store, bool is_lazy)
       : PlatformCodeStub(isolate) {
     CHECK(0 <= argc && argc <= kArgMax);
     minor_key_ = IsStoreBits::encode(is_store) |
-                 CallDataUndefinedBits::encode(call_data_undefined) |
                  ArgumentBits::encode(argc) |
                  IsLazyAccessorBits::encode(is_lazy);
   }
 
   bool is_store() const { return IsStoreBits::decode(minor_key_); }
   bool is_lazy() const { return IsLazyAccessorBits::decode(minor_key_); }
-  bool call_data_undefined() const {
-    return CallDataUndefinedBits::decode(minor_key_);
-  }
   int argc() const { return ArgumentBits::decode(minor_key_); }
 
   class IsStoreBits: public BitField<bool, 0, 1> {};
-  class CallDataUndefinedBits: public BitField<bool, 1, 1> {};
+  class IsLazyAccessorBits : public BitField<bool, 1, 1> {};
   class ArgumentBits : public BitField<int, 2, kArgBits> {};
-  class IsLazyAccessorBits : public BitField<bool, 3 + kArgBits, 1> {};
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(ApiCallback);
   DEFINE_PLATFORM_CODE_STUB(CallApiCallback, PlatformCodeStub);
 };
 
 
 class CallApiGetterStub : public PlatformCodeStub {
  public:
   explicit CallApiGetterStub(Isolate* isolate) : PlatformCodeStub(isolate) {}
 
@@ skipping 817 matching lines @@
 #undef DEFINE_PLATFORM_CODE_STUB
 #undef DEFINE_HANDLER_CODE_STUB
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODE_STUBS_H_