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

src/ia32/macro-assembler-ia32.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 36 matching lines @@
 
 
 // Convenience for platform-independent signatures.  We do not normally
 // distinguish memory operands from other operands on ia32.
 typedef Operand MemOperand;
 
 enum RememberedSetAction { EMIT_REMEMBERED_SET, OMIT_REMEMBERED_SET };
 enum SmiCheck { INLINE_SMI_CHECK, OMIT_SMI_CHECK };
 
 
-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);
 
   // ---------------------------------------------------------------------------
   // GC Support
 
   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 37 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 FieldOperand(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,
       SaveFPRegsMode save_fp,
       RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
       SmiCheck smi_check = INLINE_SMI_CHECK);
 
   // As above, but the offset has the tag presubtracted.  For use with
@@ skipping 219 matching lines @@
 
   // Modifies the register even if it does not contain a Smi!
   void SmiUntag(Register reg, Label* is_smi) {
     ASSERT(kSmiTagSize == 1);
     sar(reg, kSmiTagSize);
     ASSERT(kSmiTag == 0);
     j(not_carry, is_smi);
   }
 
   // Jump the register contains a smi.
-  inline void JumpIfSmi(Register value, Label* smi_label) {
+  inline void JumpIfSmi(Register value,
+                        Label* smi_label,
+                        Label::Distance distance = Label::kFar) {
     test(value, Immediate(kSmiTagMask));
-    j(zero, smi_label);
+    j(zero, smi_label, distance);
   }
   // Jump if register contain a non-smi.
   inline void JumpIfNotSmi(Register value, Label* not_smi_label) {
     test(value, Immediate(kSmiTagMask));
     j(not_zero, not_smi_label);
   }
 
   void LoadInstanceDescriptors(Register map, Register descriptors);
 
   void LoadPowerOf2(XMMRegister dst, Register scratch, int power);
@@ skipping 475 matching lines @@
   }                                                                       \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_MACRO_ASSEMBLER_IA32_H_