Use xorps to break the cvtsi2sd unnecessary dependence due to its partially written

src/x64/codegen-x64.cc

 // Copyright 2012 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 368 matching lines @@
   __ jmp(&done);
 
   // Conversion loop.
   __ bind(&loop);
   __ movq(rbx,
           FieldOperand(r8, r9, times_pointer_size, FixedArray::kHeaderSize));
   // r9 : current element's index
   // rbx: current element (smi-tagged)
   __ JumpIfNotSmi(rbx, &convert_hole);
   __ SmiToInteger32(rbx, rbx);
-  __ cvtlsi2sd(xmm0, rbx);
+  __ Cvtlsi2sd(xmm0, rbx);
   __ movsd(FieldOperand(r14, r9, times_8, FixedDoubleArray::kHeaderSize),
            xmm0);
   __ jmp(&entry);
   __ bind(&convert_hole);
 
   if (FLAG_debug_code) {
     __ CompareRoot(rbx, Heap::kTheHoleValueRootIndex);
     __ Assert(equal, kObjectFoundInSmiOnlyArray);
   }
 
@@ skipping 362 matching lines @@
     // argument_count_reg_ * times_pointer_size + (receiver - 1) * kPointerSize.
     return Operand(base_reg_, argument_count_reg_, times_pointer_size,
         displacement_to_last_argument + (receiver - 1 - index) * kPointerSize);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64