[Heap] Remove concept of MarkingParity.

src/x64/codegen-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/x64/codegen-x64.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/codegen.h"
 #include "src/macro-assembler.h"
@@ skipping 177 matching lines @@
 }
 #endif
 
 
 bool Code::IsYoungSequence(Isolate* isolate, byte* sequence) {
   bool result = isolate->code_aging_helper()->IsYoung(sequence);
   DCHECK(result || isolate->code_aging_helper()->IsOld(sequence));
   return result;
 }
 
-
-void Code::GetCodeAgeAndParity(Isolate* isolate, byte* sequence, Age* age,
-                               MarkingParity* parity) {
+Code::Age Code::GetCodeAge(Isolate* isolate, byte* sequence) {
   if (IsYoungSequence(isolate, sequence)) {
-    *age = kNoAgeCodeAge;
-    *parity = NO_MARKING_PARITY;
+    return kNoAgeCodeAge;
   } else {
     sequence++;  // Skip the kCallOpcode byte
     Address target_address = sequence + *reinterpret_cast<int*>(sequence) +
         Assembler::kCallTargetAddressOffset;
     Code* stub = GetCodeFromTargetAddress(target_address);
-    GetCodeAgeAndParity(stub, age, parity);
+    return GetAgeOfCodeAgeStub(stub);
   }
 }
 
-
-void Code::PatchPlatformCodeAge(Isolate* isolate,
-                                byte* sequence,
-                                Code::Age age,
-                                MarkingParity parity) {
+void Code::PatchPlatformCodeAge(Isolate* isolate, byte* sequence,
+                                Code::Age age) {
   uint32_t young_length = isolate->code_aging_helper()->young_sequence_length();
   if (age == kNoAgeCodeAge) {
     isolate->code_aging_helper()->CopyYoungSequenceTo(sequence);
     Assembler::FlushICache(isolate, sequence, young_length);
   } else {
-    Code* stub = GetCodeAgeStub(isolate, age, parity);
+    Code* stub = GetCodeAgeStub(isolate, age);
     CodePatcher patcher(isolate, sequence, young_length);
     patcher.masm()->call(stub->instruction_start());
     patcher.masm()->Nop(
         kNoCodeAgeSequenceLength - Assembler::kShortCallInstructionLength);
   }
 }
 
 
 Operand StackArgumentsAccessor::GetArgumentOperand(int index) {
   DCHECK(index >= 0);
@@ skipping 13 matching lines @@
     return Operand(base_reg_, argument_count_reg_, times_pointer_size,
         displacement_to_last_argument + (receiver - 1 - index) * kPointerSize);
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64