Add support for XMM registers in SSA code generation pipeline.

runtime/vm/assembler_x64.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_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 325 matching lines @@
 
   void addss(XmmRegister dst, XmmRegister src);
   void subss(XmmRegister dst, XmmRegister src);
   void mulss(XmmRegister dst, XmmRegister src);
   void divss(XmmRegister dst, XmmRegister src);
 
   void movsd(XmmRegister dst, const Address& src);
   void movsd(const Address& dst, XmmRegister src);
   void movsd(XmmRegister dst, XmmRegister src);
 
+  void movaps(XmmRegister dst, XmmRegister src);
+
   void addsd(XmmRegister dst, XmmRegister src);
   void subsd(XmmRegister dst, XmmRegister src);
   void mulsd(XmmRegister dst, XmmRegister src);
   void divsd(XmmRegister dst, XmmRegister src);
 
   void comisd(XmmRegister a, XmmRegister b);
   void cvtsi2sd(XmmRegister a, Register b);
 
   void xchgl(Register dst, Register src);
   void xchgq(Register dst, Register src);
@@ skipping 253 matching lines @@
   // Debugging and bringup support.
   void Stop(const char* message);
   void Unimplemented(const char* message);
   void Untested(const char* message);
   void Unreachable(const char* message);
 
   static void InitializeMemoryWithBreakpoints(uword data, int length);
 
   static const char* RegisterName(Register reg);
 
+  static const char* XmmRegisterName(XmmRegister reg);
+
  private:
   AssemblerBuffer buffer_;
   int prolog_offset_;
 
   class CodeComment : public ZoneAllocated {
    public:
     CodeComment(intptr_t pc_offset, const String& comment)
         : pc_offset_(pc_offset), comment_(comment) { }
 
     intptr_t pc_offset() const { return pc_offset_; }
@@ skipping 71 matching lines @@
 }
 
 
 inline void Assembler::EmitOperandSizeOverride() {
   EmitUint8(0x66);
 }
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_X64_H_