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

src/ic/x64/ic-x64.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_X64
 
 #include "src/codegen.h"
 #include "src/ic/ic.h"
 #include "src/ic/ic-compiler.h"
 #include "src/ic/stub-cache.h"
@@ skipping 180 matching lines @@
 
   __ movp(elements, FieldOperand(receiver, JSObject::kElementsOffset));
   __ AssertFastElements(elements);
   // Check that the key (index) is within bounds.
   __ SmiCompare(key, FieldOperand(elements, FixedArray::kLengthOffset));
   // Unsigned comparison rejects negative indices.
   __ j(below, &in_bounds);
 
   // Out-of-bounds. Check the prototype chain to see if we can just return
   // 'undefined'.
-  __ SmiCompare(key, Smi::kZero);
+  __ SmiCompare(key, Smi::FromInt(0));
   __ j(less, slow);  // Negative keys can't take the fast OOB path.
   __ bind(&check_prototypes);
   __ movp(scratch, FieldOperand(receiver, HeapObject::kMapOffset));
   __ bind(&check_next_prototype);
   __ movp(scratch, FieldOperand(scratch, Map::kPrototypeOffset));
   // scratch: current prototype
   __ CompareRoot(scratch, Heap::kNullValueRootIndex);
   __ j(equal, &absent);
   __ movp(elements, FieldOperand(scratch, JSObject::kElementsOffset));
   __ movp(scratch, FieldOperand(scratch, HeapObject::kMapOffset));
@@ skipping 628 matching lines @@
   Condition cc =
       (check == ENABLE_INLINED_SMI_CHECK)
           ? (*jmp_address == Assembler::kJncShortOpcode ? not_zero : zero)
           : (*jmp_address == Assembler::kJnzShortOpcode ? not_carry : carry);
   *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc);
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64