Re-land r25392 Use a stub in crankshaft for grow store arrays.

src/objects.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.
 
 #include <sstream>
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/allocation-site-scopes.h"
@@ skipping 11249 matching lines @@
       os << "Constant Pool\n";
       pool->Print(os);
       os << "\n";
     }
   }
 #endif
 }
 #endif  // ENABLE_DISASSEMBLER
 
 
-Handle<FixedArray> JSObject::SetFastElementsCapacityAndLength(
-    Handle<JSObject> object,
-    int capacity,
-    int length,
+Handle<FixedArray> JSObject::SetFastElementsCapacity(
+    Handle<JSObject> object, int capacity,
     SetFastElementsCapacitySmiMode smi_mode) {
   // We should never end in here with a pixel or external array.
   DCHECK(!object->HasExternalArrayElements());
 
   // Allocate a new fast elements backing store.
   Handle<FixedArray> new_elements =
       object->GetIsolate()->factory()->NewUninitializedFixedArray(capacity);
 
   ElementsKind elements_kind = object->GetElementsKind();
   ElementsKind new_elements_kind;
@@ skipping 31 matching lines @@
   } else {
     Handle<FixedArray> parameter_map = Handle<FixedArray>::cast(old_elements);
     parameter_map->set(1, *new_elements);
   }
 
   if (FLAG_trace_elements_transitions) {
     PrintElementsTransition(stdout, object, elements_kind, old_elements,
                             object->GetElementsKind(), new_elements);
   }
 
+  return new_elements;
+}
+
+
+Handle<FixedArray> JSObject::SetFastElementsCapacityAndLength(
+    Handle<JSObject> object, int capacity, int length,
+    SetFastElementsCapacitySmiMode smi_mode) {
+  Handle<FixedArray> new_elements =
+      SetFastElementsCapacity(object, capacity, smi_mode);
   if (object->IsJSArray()) {
     Handle<JSArray>::cast(object)->set_length(Smi::FromInt(length));
   }
   return new_elements;
 }
 
 
-void JSObject::SetFastDoubleElementsCapacityAndLength(Handle<JSObject> object,
-                                                      int capacity,
-                                                      int length) {
+Handle<FixedArrayBase> JSObject::SetFastDoubleElementsCapacity(
+    Handle<JSObject> object, int capacity) {
   // We should never end in here with a pixel or external array.
   DCHECK(!object->HasExternalArrayElements());
 
   Handle<FixedArrayBase> elems =
       object->GetIsolate()->factory()->NewFixedDoubleArray(capacity);
 
   ElementsKind elements_kind = object->GetElementsKind();
   CHECK(elements_kind != SLOPPY_ARGUMENTS_ELEMENTS);
   ElementsKind new_elements_kind = elements_kind;
   if (IsHoleyElementsKind(elements_kind)) {
     new_elements_kind = FAST_HOLEY_DOUBLE_ELEMENTS;
   } else {
     new_elements_kind = FAST_DOUBLE_ELEMENTS;
   }
 
   Handle<Map> new_map = GetElementsTransitionMap(object, new_elements_kind);
 
   Handle<FixedArrayBase> old_elements(object->elements());
   ElementsAccessor* accessor = ElementsAccessor::ForKind(FAST_DOUBLE_ELEMENTS);
   accessor->CopyElements(object, elems, elements_kind);
 
   JSObject::ValidateElements(object);
   JSObject::SetMapAndElements(object, new_map, elems);
 
   if (FLAG_trace_elements_transitions) {
     PrintElementsTransition(stdout, object, elements_kind, old_elements,
                             object->GetElementsKind(), elems);
   }
 
+  return elems;
+}
+
+
+Handle<FixedArrayBase> JSObject::SetFastDoubleElementsCapacityAndLength(
+    Handle<JSObject> object, int capacity, int length) {
+  Handle<FixedArrayBase> new_elements =
+      SetFastDoubleElementsCapacity(object, capacity);
   if (object->IsJSArray()) {
     Handle<JSArray>::cast(object)->set_length(Smi::FromInt(length));
   }
+  return new_elements;
 }
 
 
 // static
 void JSArray::Initialize(Handle<JSArray> array, int capacity, int length) {
   DCHECK(capacity >= 0);
   array->GetIsolate()->factory()->NewJSArrayStorage(
       array, length, capacity, INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE);
 }
 
@@ skipping 1904 matching lines @@
       // External arrays are considered 100% used.
       FixedArrayBase* external_array = FixedArrayBase::cast(elements());
       *capacity = external_array->length();
       *used = external_array->length();
       break;
     }
   }
 }
 
 
-bool JSObject::WouldConvertToSlowElements(Handle<Object> key) {
-  uint32_t index;
-  if (HasFastElements() && key->ToArrayIndex(&index)) {
+bool JSObject::WouldConvertToSlowElements(uint32_t index) {
+  if (HasFastElements()) {
     Handle<FixedArrayBase> backing_store(FixedArrayBase::cast(elements()));
     uint32_t capacity = static_cast<uint32_t>(backing_store->length());
     if (index >= capacity) {
       if ((index - capacity) >= kMaxGap) return true;
       uint32_t new_capacity = NewElementsCapacity(index + 1);
       return ShouldConvertToSlowElements(new_capacity);
     }
   }
   return false;
 }
@@ skipping 3525 matching lines @@
   Handle<DependentCode> codes =
       DependentCode::Insert(handle(cell->dependent_code(), info->isolate()),
                             DependentCode::kPropertyCellChangedGroup,
                             info->object_wrapper());
   if (*codes != cell->dependent_code()) cell->set_dependent_code(*codes);
   info->dependencies(DependentCode::kPropertyCellChangedGroup)->Add(
       cell, info->zone());
 }
 
 } }  // namespace v8::internal