Land the Fan (disabled)

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index e14c1af6db83bbb880df0768ed2c5fe726cf0a23..5ef23c5789f121c957f98a5853450a98475ff716 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -731,10 +731,19 @@ bool Object::IsDeoptimizationInputData() const {
   // the entry size.
   int length = FixedArray::cast(this)->length();
   if (length == 0) return true;
+  if (length < DeoptimizationInputData::kFirstDeoptEntryIndex) return false;
 
-  length -= DeoptimizationInputData::kFirstDeoptEntryIndex;
-  return length >= 0 &&
-      length % DeoptimizationInputData::kDeoptEntrySize == 0;
+  FixedArray* self = FixedArray::cast(const_cast<Object*>(this));
+  int deopt_count =
+      Smi::cast(self->get(DeoptimizationInputData::kDeoptEntryCountIndex))
+          ->value();
+  int patch_count =
+      Smi::cast(
+          self->get(
+              DeoptimizationInputData::kReturnAddressPatchEntryCountIndex))
+          ->value();
+
+  return length == DeoptimizationInputData::LengthFor(deopt_count, patch_count);
 }
 
 
@@ -1082,6 +1091,12 @@ bool Object::IsNaN() const {
 }
 
 
+bool Object::IsMinusZero() const {
+  return this->IsHeapNumber() &&
+         i::IsMinusZero(HeapNumber::cast(this)->value());
+}
+
+
 MaybeHandle<Smi> Object::ToSmi(Isolate* isolate, Handle<Object> object) {
   if (object->IsSmi()) return Handle<Smi>::cast(object);
   if (object->IsHeapNumber()) {
@@ -4703,6 +4718,21 @@ inline void Code::set_is_crankshafted(bool value) {
 }
 
 
+inline bool Code::is_turbofanned() {
+  ASSERT(kind() == OPTIMIZED_FUNCTION || kind() == STUB);
+  return IsTurbofannedField::decode(
+      READ_UINT32_FIELD(this, kKindSpecificFlags1Offset));
+}
+
+
+inline void Code::set_is_turbofanned(bool value) {
+  ASSERT(kind() == OPTIMIZED_FUNCTION || kind() == STUB);
+  int previous = READ_UINT32_FIELD(this, kKindSpecificFlags1Offset);
+  int updated = IsTurbofannedField::update(previous, value);
+  WRITE_UINT32_FIELD(this, kKindSpecificFlags1Offset, updated);
+}
+
+
 bool Code::optimizable() {
   ASSERT_EQ(FUNCTION, kind());
   return READ_BYTE_FIELD(this, kOptimizableOffset) == 1;