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

src/crankshaft/s390/lithium-codegen-s390.cc

 // Copyright 2014 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/s390/lithium-codegen-s390.h"
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 5176 matching lines @@
     __ bge(&loop);
   }
 }
 
 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.
-  __ LoadSmiLiteral(result, Smi::FromInt(0));
+  __ LoadSmiLiteral(result, Smi::kZero);
 
   PushSafepointRegistersScope scope(this);
   if (instr->size()->IsRegister()) {
     Register size = ToRegister(instr->size());
     DCHECK(!size.is(result));
     __ SmiTag(size);
     __ push(size);
   } else {
     int32_t size = ToInteger32(LConstantOperand::cast(instr->size()));
 #if !V8_TARGET_ARCH_S390X
@@ skipping 297 matching lines @@
   __ push(r2);
   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);
-  __ CmpSmiLiteral(result, Smi::FromInt(0), r0);
+  __ CmpSmiLiteral(result, Smi::kZero, r0);
   __ bne(&load_cache, Label::kNear);
   __ mov(result, Operand(isolate()->factory()->empty_fixed_array()));
   __ b(&done, Label::kNear);
 
   __ bind(&load_cache);
   __ LoadInstanceDescriptors(map, result);
   __ LoadP(result, FieldMemOperand(result, DescriptorArray::kEnumCacheOffset));
   __ LoadP(result, FieldMemOperand(result, FixedArray::SizeFor(instr->idx())));
   __ CmpP(result, Operand::Zero());
   DeoptimizeIf(eq, instr, DeoptimizeReason::kNoCache);
@@ skipping 75 matching lines @@
   __ LoadP(result,
            FieldMemOperand(scratch, FixedArray::kHeaderSize - kPointerSize));
   __ bind(deferred->exit());
   __ bind(&done);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8