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

src/objects-debug.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/objects.h"
 
 #include "src/bootstrapper.h"
 #include "src/disasm.h"
 #include "src/disassembler.h"
 #include "src/field-type.h"
@@ skipping 659 matching lines @@
   Address last_gc_pc = NULL;
   Isolate* isolate = GetIsolate();
   for (RelocIterator it(this); !it.done(); it.next()) {
     it.rinfo()->Verify(isolate);
     // Ensure that GC will not iterate twice over the same pointer.
     if (RelocInfo::IsGCRelocMode(it.rinfo()->rmode())) {
       CHECK(it.rinfo()->pc() != last_gc_pc);
       last_gc_pc = it.rinfo()->pc();
     }
   }
-  CHECK(raw_type_feedback_info() == Smi::FromInt(0) ||
+  CHECK(raw_type_feedback_info() == Smi::kZero ||
         raw_type_feedback_info()->IsSmi() == IsCodeStubOrIC());
 }
 
 
 void Code::VerifyEmbeddedObjectsDependency() {
   if (!CanContainWeakObjects()) return;
   WeakCell* cell = CachedWeakCell();
   DisallowHeapAllocation no_gc;
   Isolate* isolate = GetIsolate();
   HandleScope scope(isolate);
@@ skipping 174 matching lines @@
         byte_length()->IsUndefined(GetIsolate()));
 }
 
 
 void JSArrayBufferView::JSArrayBufferViewVerify() {
   CHECK(IsJSArrayBufferView());
   JSObjectVerify();
   VerifyPointer(buffer());
   Isolate* isolate = GetIsolate();
   CHECK(buffer()->IsJSArrayBuffer() || buffer()->IsUndefined(isolate) ||
-        buffer() == Smi::FromInt(0));
+        buffer() == Smi::kZero);
 
   VerifyPointer(raw_byte_offset());
   CHECK(raw_byte_offset()->IsSmi() || raw_byte_offset()->IsHeapNumber() ||
         raw_byte_offset()->IsUndefined(isolate));
 
   VerifyPointer(raw_byte_length());
   CHECK(raw_byte_length()->IsSmi() || raw_byte_length()->IsHeapNumber() ||
         raw_byte_length()->IsUndefined(isolate));
 }
 
@@ skipping 476 matching lines @@
 
   // Both are done at the same time.
   CHECK_EQ(new_it.done(), old_it.done());
 }
 
 
 #endif  // DEBUG
 
 }  // namespace internal
 }  // namespace v8