Load size in signed int before making negative.

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 2178 matching lines @@
   }
 
   XMMRegister input_reg = ToDoubleRegister(instr->object());
   __ ucomisd(input_reg, input_reg);
   EmitFalseBranch(instr, parity_odd);
 
   __ subq(rsp, Immediate(kDoubleSize));
   __ movsd(MemOperand(rsp, 0), input_reg);
   __ addq(rsp, Immediate(kDoubleSize));
 
-  int size = sizeof(kHoleNanUpper32);
-  __ cmpl(MemOperand(rsp, -size),
-         Immediate(kHoleNanUpper32));
+  int offset = sizeof(kHoleNanUpper32);
+  __ cmpl(MemOperand(rsp, -offset), Immediate(kHoleNanUpper32));
   EmitBranch(instr, equal);
 }
 
 
 Condition LCodeGen::EmitIsObject(Register input,
                                  Label* is_not_object,
                                  Label* is_object) {
   ASSERT(!input.is(kScratchRegister));
 
   __ JumpIfSmi(input, is_not_object);
@@ skipping 3299 matching lines @@
                                FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64