Add UseAny to create a LOperand without register preference....

src/x64/lithium-x64.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 1951 matching lines @@
   // Operand created by UseRegister is guaranteed to be live until the end of
   // instruction. This means that register allocator will not reuse it's
   // register for any other operand inside instruction.
   // Operand created by UseRegisterAtStart is guaranteed to be live only at
   // instruction start. Register allocator is free to assign the same register
   // to some other operand used inside instruction (i.e. temporary or
   // output).
   LOperand* UseRegister(HValue* value);
   LOperand* UseRegisterAtStart(HValue* value);
 
-  // A value in a register that may be trashed.
+  // An operand value in a register that may be trashed.
   LOperand* UseTempRegister(HValue* value);
+
+  // An operand value in a register or stack slot.
   LOperand* Use(HValue* value);
   LOperand* UseAtStart(HValue* value);
+
+  // An operand value in a register, stack slot or a constant operand.
   LOperand* UseOrConstant(HValue* value);
   LOperand* UseOrConstantAtStart(HValue* value);
+
+  // An operand value in a register or a constant operand.
   LOperand* UseRegisterOrConstant(HValue* value);
   LOperand* UseRegisterOrConstantAtStart(HValue* value);
 
+  // An operand value in register, stack slot or a constant operand.
+  // Will not be moved to a register even if one is freely available.
+  LOperand* UseAny(HValue* value);
+
   // Methods for setting up define-use relationships.
   // Return the same instruction that they are passed.
   template<int I, int T>
       LInstruction* Define(LTemplateInstruction<1, I, T>* instr,
                            LUnallocated* result);
   template<int I, int T>
       LInstruction* Define(LTemplateInstruction<1, I, T>* instr);
   template<int I, int T>
       LInstruction* DefineAsRegister(LTemplateInstruction<1, I, T>* instr);
   template<int I, int T>
@@ skipping 57 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_LITHIUM_X64_H_