Correct handling of arrays with callbacks in the prototype chain.

src/ia32/macro-assembler-ia32.cc

Index: src/ia32/macro-assembler-ia32.cc
diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc
index ed69fd07686f8d1df9287782fc9f40459744a420..730ec83c4fb4de1967fffdd8416f3b422f1fd835 100644
--- a/src/ia32/macro-assembler-ia32.cc
+++ b/src/ia32/macro-assembler-ia32.cc
@@ -3550,6 +3550,34 @@ void MacroAssembler::TestJSArrayForAllocationMemento(
 }
 
 
+void MacroAssembler::HasDictionaryInPrototypeChain(
+    Register object,
+    Register elements,
+    Register scratch,
+    Label* found) {
+  Factory* factory = isolate()->factory();
+  Register temp = elements;
+  Label loop_again;
+
+  // scratch contained elements pointer.
+  mov(temp, object);
+
+  // Loop based on the map going up the prototype chain.
+  bind(&loop_again);
+  mov(temp, FieldOperand(temp, HeapObject::kMapOffset));
+  mov(scratch, FieldOperand(temp, Map::kBitField2Offset));
+  and_(scratch, Map::kElementsKindMask);
+  shr(scratch, Map::kElementsKindShift);
+  cmp(scratch, Immediate(DICTIONARY_ELEMENTS));
+  j(equal, found);
+  mov(temp, FieldOperand(temp, Map::kPrototypeOffset));
+  cmp(temp, Immediate(factory->null_value()));
+  j(not_equal, &loop_again);
+
+  // Restore elements
+  mov(elements, FieldOperand(object, JSObject::kElementsOffset));
+}
+
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32