Deletion barrier: Distinguish+verify field initialization in ia32 generated code.

runtime/vm/assembler_x64.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ASSEMBLER_X64_H_
 #define VM_ASSEMBLER_X64_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_x64.h directly; use assembler.h instead.
 #endif
@@ skipping 754 matching lines @@
   void StoreIntoObjectNoBarrier(Register object,
                                 const Address& dest,
                                 Register value);
   void StoreIntoObjectNoBarrier(Register object,
                                 const Address& dest,
                                 const Object& value,
                                 Register pp);
 
   // Stores a Smi value into a heap object field that always contains a Smi.
   void StoreIntoSmiField(const Address& dest, Register value);
-  void ZeroSmiField(const Address& dest);
+  void ZeroInitSmiField(const Address& dest);
   // Increments a Smi field. Leaves flags in same state as an 'addq'.
   void IncrementSmiField(const Address& dest, int64_t increment);
 
   void DoubleNegate(XmmRegister d);
   void FloatNegate(XmmRegister f);
 
   void DoubleAbs(XmmRegister reg);
 
   void LockCmpxchgq(const Address& address, Register reg) {
     lock();
@@ skipping 412 matching lines @@
 }
 
 
 inline void Assembler::EmitOperandSizeOverride() {
   EmitUint8(0x66);
 }
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_X64_H_