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

src/x64/stub-cache-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 820 matching lines @@
   } else if (FLAG_track_fields && representation.IsSmi()) {
     __ JumpIfNotSmi(value_reg, miss_label);
   } else if (FLAG_track_heap_object_fields && representation.IsHeapObject()) {
     __ JumpIfSmi(value_reg, miss_label);
   } else if (FLAG_track_double_fields && representation.IsDouble()) {
     Label do_store, heap_number;
     __ AllocateHeapNumber(storage_reg, scratch1, slow);
 
     __ JumpIfNotSmi(value_reg, &heap_number);
     __ SmiToInteger32(scratch1, value_reg);
-    __ cvtlsi2sd(xmm0, scratch1);
+    __ Cvtlsi2sd(xmm0, scratch1);
     __ jmp(&do_store);
 
     __ bind(&heap_number);
     __ CheckMap(value_reg, masm->isolate()->factory()->heap_number_map(),
                 miss_label, DONT_DO_SMI_CHECK);
     __ movsd(xmm0, FieldOperand(value_reg, HeapNumber::kValueOffset));
 
     __ bind(&do_store);
     __ movsd(FieldOperand(storage_reg, HeapNumber::kValueOffset), xmm0);
   }
@@ skipping 133 matching lines @@
       __ movq(scratch1,
               FieldOperand(receiver_reg, JSObject::kPropertiesOffset));
       int offset = index * kPointerSize + FixedArray::kHeaderSize;
       __ movq(scratch1, FieldOperand(scratch1, offset));
     }
 
     // Store the value into the storage.
     Label do_store, heap_number;
     __ JumpIfNotSmi(value_reg, &heap_number);
     __ SmiToInteger32(scratch2, value_reg);
-    __ cvtlsi2sd(xmm0, scratch2);
+    __ Cvtlsi2sd(xmm0, scratch2);
     __ jmp(&do_store);
 
     __ bind(&heap_number);
     __ CheckMap(value_reg, masm->isolate()->factory()->heap_number_map(),
                 miss_label, DONT_DO_SMI_CHECK);
     __ movsd(xmm0, FieldOperand(value_reg, HeapNumber::kValueOffset));
     __ bind(&do_store);
     __ movsd(FieldOperand(scratch1, HeapNumber::kValueOffset), xmm0);
     // Return the value (register rax).
     ASSERT(value_reg.is(rax));
@@ skipping 2144 matching lines @@
   // -----------------------------------
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_MissForceGeneric);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64