Make x64 to use the RecordWrite stub. This is a step towards getting

src/arm/macro-assembler-arm.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 66 matching lines @@
   // Don't load NaNs or infinities, branch to the non number case instead.
   AVOID_NANS_AND_INFINITIES = 1 << 1
 };
 
 
 enum RememberedSetAction { EMIT_REMEMBERED_SET, OMIT_REMEMBERED_SET };
 enum SmiCheck { INLINE_SMI_CHECK, OMIT_SMI_CHECK };
 enum LinkRegisterStatus { kLRHasNotBeenSaved, kLRHasBeenSaved };
 
 
-bool Aliasing(Register r1, Register r2, Register r3, Register r4);
+bool AreAliased(Register r1, Register r2, Register r3, Register r4);
 
 
 // MacroAssembler implements a collection of frequently used macros.
 class MacroAssembler: public Assembler {
  public:
   // The isolate parameter can be NULL if the macro assembler should
   // not use isolate-dependent functionality. In this case, it's the
   // responsibility of the caller to never invoke such function on the
   // macro assembler.
   MacroAssembler(Isolate* isolate, void* buffer, int size);
@@ skipping 72 matching lines @@
 
   void IncrementalMarkingRecordWriteHelper(Register object,
                                            Register value,
                                            Register address);
 
   enum RememberedSetFinalAction {
     kReturnAtEnd,
     kFallThroughAtEnd
   };
 
-  // For page containing |object| mark region covering |addr| dirty.
-  // RememberedSetHelper only works if the object is not in new
-  // space.
+  // Record in the remembered set the fact that we have a pointer to new space
+  // at the address pointed to by the addr register.  Only works if addr is not
+  // in new space.
   void RememberedSetHelper(Register addr,
                            Register scratch,
                            SaveFPRegsMode save_fp,
                            RememberedSetFinalAction and_then);
 
   void CheckPageFlag(Register object,
                      Register scratch,
                      MemoryChunk::MemoryChunkFlags flag,
                      Condition cc,
                      Label* condition_met);
@@ skipping 35 matching lines @@
 
   // Checks whether an object is data-only, ie it does need to be scanned by the
   // garbage collector.
   void IsDataObject(Register value,
                     Register scratch,
                     Label* not_data_object,
                     Label::Distance not_data_object_distance);
 
   // Notify the garbage collector that we wrote a pointer into an object.
   // |object| is the object being stored into, |value| is the object being
-  // stored.  All registers are clobbered by the operation.  RecordWriteField
-  // filters out smis so it does not update the write barrier if the value is a
-  // smi.  The offset is the offset from the start of the object, not the offset
-  // from the tagged HeapObject pointer.  For use with
-  // FieldMemOperand(reg, off)
+  // stored.  value and scratch registers are clobbered by the operation.
+  // The offset is the offset from the start of the object, not the offset from
+  // the tagged HeapObject pointer.  For use with FieldOperand(reg, off).
   void RecordWriteField(
       Register object,
       int offset,
       Register value,
       Register scratch,
       LinkRegisterStatus lr_status,
       SaveFPRegsMode save_fp,
       RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
       SmiCheck smi_check = INLINE_SMI_CHECK);
 
@@ skipping 962 matching lines @@
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_MACRO_ASSEMBLER_ARM_H_