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

src/ic/arm64/ic-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/codegen.h"
 #include "src/ic/ic.h"
 #include "src/ic/ic-compiler.h"
 #include "src/ic/stub-cache.h"
@@ skipping 163 matching lines @@
   __ Ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
   __ AssertFastElements(elements);
 
   // Check that the key (index) is within bounds.
   __ Ldr(scratch1, FieldMemOperand(elements, FixedArray::kLengthOffset));
   __ Cmp(key, scratch1);
   __ B(lo, &in_bounds);
 
   // Out of bounds. Check the prototype chain to see if we can just return
   // 'undefined'.
-  __ Cmp(key, Operand(Smi::FromInt(0)));
+  __ Cmp(key, Operand(Smi::kZero));
   __ B(lt, slow);  // Negative keys can't take the fast OOB path.
   __ Bind(&check_prototypes);
   __ Ldr(scratch2, FieldMemOperand(receiver, HeapObject::kMapOffset));
   __ Bind(&check_next_prototype);
   __ Ldr(scratch2, FieldMemOperand(scratch2, Map::kPrototypeOffset));
   // scratch2: current prototype
   __ JumpIfRoot(scratch2, Heap::kNullValueRootIndex, &absent);
   __ Ldr(elements, FieldMemOperand(scratch2, JSObject::kElementsOffset));
   __ Ldr(scratch2, FieldMemOperand(scratch2, HeapObject::kMapOffset));
   // elements: elements of current prototype
@@ skipping 649 matching lines @@
   } else {
     DCHECK(to_patch->Mask(TestBranchMask) == TBNZ);
     // This is JumpIfSmi(smi_reg, branch_imm).
     patcher.tbz(smi_reg, 0, branch_imm);
   }
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64