Add Smi::Zero and replace all Smi::FromInt(0) calls

src/crankshaft/mips64/lithium-codegen-mips64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/crankshaft/mips64/lithium-codegen-mips64.h"
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/crankshaft/hydrogen-osr.h"
 #include "src/crankshaft/mips64/lithium-gap-resolver-mips64.h"
@@ skipping 5561 matching lines @@
   CallRuntime(Runtime::kForInEnumerate, instr);
   __ bind(&use_cache);
 }
 
 
 void LCodeGen::DoForInCacheArray(LForInCacheArray* instr) {
   Register map = ToRegister(instr->map());
   Register result = ToRegister(instr->result());
   Label load_cache, done;
   __ EnumLength(result, map);
-  __ Branch(&load_cache, ne, result, Operand(Smi::FromInt(0)));
+  __ Branch(&load_cache, ne, result, Operand(Smi::kZero));
   __ li(result, Operand(isolate()->factory()->empty_fixed_array()));
   __ jmp(&done);
 
   __ bind(&load_cache);
   __ LoadInstanceDescriptors(map, result);
   __ ld(result,
         FieldMemOperand(result, DescriptorArray::kEnumCacheOffset));
   __ ld(result,
         FieldMemOperand(result, FixedArray::SizeFor(instr->idx())));
   DeoptimizeIf(eq, instr, DeoptimizeReason::kNoCache, result,
@@ skipping 81 matching lines @@
   __ ld(result, FieldMemOperand(scratch,
                                 FixedArray::kHeaderSize - kPointerSize));
   __ bind(deferred->exit());
   __ bind(&done);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8