Fix Win64 build of Dart VM.

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 696 matching lines @@
   void DoubleNegate(XmmRegister d);
   void FloatNegate(XmmRegister f);
 
   void DoubleAbs(XmmRegister reg);
 
   void LockCmpxchgl(const Address& address, Register reg) {
     lock();
     cmpxchgl(address, reg);
   }
 
+  void PushRegisters(intptr_t cpu_register_set, intptr_t xmm_register_set);
+  void PopRegisters(intptr_t cpu_register_set, intptr_t xmm_register_set);
+
   void EnterFrame(intptr_t frame_space);
   void LeaveFrame();
   void ReserveAlignedFrameSpace(intptr_t frame_space);
 
   // Create a frame for calling into runtime that preserves all volatile
   // registers.  Frame's RSP is guaranteed to be correctly aligned and
   // frame_space bytes are reserved under it.
   void EnterCallRuntimeFrame(intptr_t frame_space);
   void LeaveCallRuntimeFrame();
 
   void CallRuntime(const RuntimeEntry& entry, intptr_t argument_count);
 
+  // Call runtime function. Reserves shadow space on the stack before calling
+  // if platform ABI requires that. Does not restore RSP after the call itself.
+  void CallCFunction(const ExternalLabel* label);
+  void CallCFunction(Register reg);
+
   /*
    * Loading and comparing classes of objects.
    */
   void LoadClassId(Register result, Register object);
 
   void LoadClassById(Register result, Register class_id);
 
   void LoadClass(Register result, Register object);
 
   void CompareClassId(Register object, intptr_t class_id);
@@ skipping 328 matching lines @@
 }
 
 
 inline void Assembler::EmitOperandSizeOverride() {
   EmitUint8(0x66);
 }
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_X64_H_