Fix equality instruction to switch from checked (polymorphic) to megamorphic state. This helps da…

runtime/vm/intermediate_language.cc

Index: runtime/vm/intermediate_language.cc
===================================================================
--- runtime/vm/intermediate_language.cc	(revision 14294)
+++ runtime/vm/intermediate_language.cc	(working copy)
@@ -21,8 +21,8 @@
 namespace dart {
 
 DECLARE_FLAG(bool, enable_type_checks);
+DECLARE_FLAG(int, max_polymorphic_checks);
 
-
 Definition::Definition()
     : range_(NULL),
       temp_index_(-1),
@@ -1074,6 +1074,13 @@
 }
 
 
+bool EqualityCompareInstr::IsPolymorphic() const {
+  return HasICData() &&
+      (ic_data()->NumberOfChecks() > 0) &&
+      (ic_data()->NumberOfChecks() <= FLAG_max_polymorphic_checks);
+}
+
+
 RawAbstractType* RelationalOpInstr::CompileType() const {
   if ((operands_class_id() == kSmiCid) ||
       (operands_class_id() == kDoubleCid) ||