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

runtime/vm/intermediate_language_x64.cc

Index: runtime/vm/intermediate_language_x64.cc
===================================================================
--- runtime/vm/intermediate_language_x64.cc	(revision 14294)
+++ runtime/vm/intermediate_language_x64.cc	(working copy)
@@ -308,7 +308,7 @@
     locs->set_out(Location::RequiresRegister());
     return locs;
   }
-  if (HasICData() && (ic_data()->NumberOfChecks() > 0)) {
+  if (IsPolymorphic()) {
     const intptr_t kNumTemps = 1;
     LocationSummary* locs =
         new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
@@ -700,7 +700,7 @@
                            deopt_id());
     return;
   }
-  if (HasICData() && (ic_data()->NumberOfChecks() > 0)) {
+  if (IsPolymorphic()) {
     EmitGenericEqualityCompare(compiler, locs(), kind(), kNoBranch, *ic_data(),
                                deopt_id(), token_pos());
     return;
@@ -739,7 +739,7 @@
                            deopt_id());
     return;
   }
-  if (HasICData() && (ic_data()->NumberOfChecks() > 0)) {
+  if (IsPolymorphic()) {
     EmitGenericEqualityCompare(compiler, locs(), kind(), branch, *ic_data(),
                                deopt_id(), token_pos());
     return;