Generate code for store buffer updates in open-coded object field stores.

runtime/vm/assembler_ia32.h

 // Copyright (c) 2012, 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_IA32_H_
 #define VM_ASSEMBLER_IA32_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_ia32.h directly; use assembler.h instead.
 #endif
@@ skipping 284 matching lines @@
 
   static const intptr_t kCallExternalLabelSize = 5;
 
   void pushl(Register reg);
   void pushl(const Address& address);
   void pushl(const Immediate& imm);
 
   void popl(Register reg);
   void popl(const Address& address);
 
+  void pushal();
+  void popal();
+
   void movl(Register dst, const Immediate& src);
   void movl(Register dst, Register src);
 
   void movl(Register dst, const Address& src);
   void movl(const Address& dst, Register src);
   void movl(const Address& dst, const Immediate& imm);
 
   void movzxb(Register dst, ByteRegister src);
   void movzxb(Register dst, const Address& src);
   void movsxb(Register dst, ByteRegister src);
@@ skipping 198 matching lines @@
   void Drop(intptr_t stack_elements);
 
   void LoadObject(Register dst, const Object& object);
   void PushObject(const Object& object);
   void CompareObject(Register reg, const Object& object);
   void LoadDoubleConstant(XmmRegister dst, double value);
 
   void StoreIntoObject(Register object,  // Object we are storing into.
                        const FieldAddress& dest,  // Where we are storing into.
                        Register value);  // Value we are storing.
+  void StoreNullIntoObject(Register object,
+                           const FieldAddress& dest);
 
   void DoubleNegate(XmmRegister d);
   void FloatNegate(XmmRegister f);
 
   void DoubleAbs(XmmRegister reg);
 
   void LockCmpxchgl(const Address& address, Register reg) {
     lock();
     cmpxchgl(address, reg);
   }
@@ skipping 121 matching lines @@
 }
 
 
 inline void Assembler::EmitOperandSizeOverride() {
   EmitUint8(0x66);
 }
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_IA32_H_