Use the macro assembler Set instead of explicit xor for clearing registers.

src/ia32/ic-ia32.cc

 // Copyright 2010 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 1181 matching lines @@
     __ bind(&is_nan);
     __ ffree();
     __ fincstp();
     switch (array_type) {
       case kExternalByteArray:
       case kExternalUnsignedByteArray:
         __ mov_b(Operand(edi, ebx, times_1, 0), 0);
         break;
       case kExternalShortArray:
       case kExternalUnsignedShortArray:
-        __ xor_(ecx, Operand(ecx));
+        __ Set(ecx, Immediate(0));
         __ mov_w(Operand(edi, ebx, times_2, 0), ecx);
         break;
       case kExternalIntArray:
       case kExternalUnsignedIntArray:
         __ mov(Operand(edi, ebx, times_4, 0), Immediate(0));
         break;
       default:
         UNREACHABLE();
         break;
     }
@@ skipping 907 matching lines @@
   Condition cc = *jmp_address == Assembler::kJncShortOpcode
       ? not_zero
       : zero;
   *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32