[Heap] Remove concept of MarkingParity.

src/builtins/ppc/builtins-ppc.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_PPC
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 1559 matching lines @@
   __ PrepareCallCFunction(2, 0, r5);
   __ mov(r4, Operand(ExternalReference::isolate_address(masm->isolate())));
   __ CallCFunction(
       ExternalReference::get_make_code_young_function(masm->isolate()), 2);
   __ MultiPop(r0.bit() | r3.bit() | r4.bit() | r6.bit() | fp.bit());
   __ mtlr(r0);
   __ mr(ip, r3);
   __ Jump(ip);
 }
 
-#define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C)                  \
-  void Builtins::Generate_Make##C##CodeYoungAgainEvenMarking( \
-      MacroAssembler* masm) {                                 \
-    GenerateMakeCodeYoungAgainCommon(masm);                   \
-  }                                                           \
-  void Builtins::Generate_Make##C##CodeYoungAgainOddMarking(  \
-      MacroAssembler* masm) {                                 \
-    GenerateMakeCodeYoungAgainCommon(masm);                   \
+#define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C)                              \
+  void Builtins::Generate_Make##C##CodeYoungAgain(MacroAssembler* masm) { \
+    GenerateMakeCodeYoungAgainCommon(masm);                               \
   }
 CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR)
 #undef DEFINE_CODE_AGE_BUILTIN_GENERATOR
 
 void Builtins::Generate_MarkCodeAsExecutedOnce(MacroAssembler* masm) {
   // For now, we are relying on the fact that make_code_young doesn't do any
   // garbage collection which allows us to save/restore the registers without
   // worrying about which of them contain pointers. We also don't build an
   // internal frame to make the code faster, since we shouldn't have to do stack
   // crawls in MakeCodeYoung. This seems a bit fragile.
@@ skipping 1353 matching lines @@
     __ CallRuntime(Runtime::kThrowStackOverflow);
     __ bkpt(0);
   }
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC