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

src/crankshaft/ia32/lithium-codegen-ia32.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.
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/crankshaft/ia32/lithium-codegen-ia32.h"
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 4797 matching lines @@
     __ FastAllocate(size, result, temp, flags);
   }
 }
 
 void LCodeGen::DoDeferredAllocate(LAllocate* instr) {
   Register result = ToRegister(instr->result());
 
   // TODO(3095996): Get rid of this. For now, we need to make the
   // result register contain a valid pointer because it is already
   // contained in the register pointer map.
-  __ Move(result, Immediate(Smi::FromInt(0)));
+  __ Move(result, Immediate(Smi::kZero));
 
   PushSafepointRegistersScope scope(this);
   if (instr->size()->IsRegister()) {
     Register size = ToRegister(instr->size());
     DCHECK(!size.is(result));
     __ SmiTag(ToRegister(instr->size()));
     __ push(size);
   } else {
     int32_t size = ToInteger32(LConstantOperand::cast(instr->size()));
     if (size >= 0 && size <= Smi::kMaxValue) {
@@ skipping 283 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);
-  __ cmp(result, Immediate(Smi::FromInt(0)));
+  __ cmp(result, Immediate(Smi::kZero));
   __ j(not_equal, &load_cache, Label::kNear);
   __ mov(result, isolate()->factory()->empty_fixed_array());
   __ jmp(&done, Label::kNear);
 
   __ bind(&load_cache);
   __ LoadInstanceDescriptors(map, result);
   __ mov(result,
          FieldOperand(result, DescriptorArray::kEnumCacheOffset));
   __ mov(result,
          FieldOperand(result, FixedArray::SizeFor(instr->idx())));
@@ skipping 80 matching lines @@
   __ bind(deferred->exit());
   __ bind(&done);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_IA32