Fixed build (unused vars in release mode).

src/x64/lithium-codegen-x64.cc

 // Copyright 2013 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 1313 matching lines @@
   }
 }
 
 
 // TODO(svenpanne) Refactor this to avoid code duplication with DoFlooringDivI.
 void LCodeGen::DoDivI(LDivI* instr) {
   HBinaryOperation* hdiv = instr->hydrogen();
   Register dividend = ToRegister(instr->dividend());
   Register divisor = ToRegister(instr->divisor());
   Register remainder = ToRegister(instr->temp());
-  Register result = ToRegister(instr->result());
   ASSERT(dividend.is(rax));
   ASSERT(remainder.is(rdx));
-  ASSERT(result.is(rax));
+  ASSERT(ToRegister(instr->result()).is(rax));
   ASSERT(!divisor.is(rax));
   ASSERT(!divisor.is(rdx));
 
   // Check for x / 0.
   if (hdiv->CheckFlag(HValue::kCanBeDivByZero)) {
     __ testl(divisor, divisor);
     DeoptimizeIf(zero, instr->environment());
   }
 
   // Check for (0 / -x) that will produce negative zero.
@@ skipping 4331 matching lines @@
   __ bind(deferred->exit());
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64