Use off-heap data for class check instructions

runtime/vm/flow_graph_compiler.cc

Index: runtime/vm/flow_graph_compiler.cc
diff --git a/runtime/vm/flow_graph_compiler.cc b/runtime/vm/flow_graph_compiler.cc
index 3fbeb86ece5f866050f9c32d51969abdfe0c183b..398f0566059acee97d253a48616154b2f6994454 100644
--- a/runtime/vm/flow_graph_compiler.cc
+++ b/runtime/vm/flow_graph_compiler.cc
@@ -1634,56 +1634,6 @@ ParallelMoveResolver::ScratchRegisterScope::~ScratchRegisterScope() {
 }
 
 
-template <typename T>
-static int HighestCountFirst(const T* a, const T* b) {
-  // Negative if 'a' should sort before 'b'.
-  return b->count - a->count;
-}
-
-
-static int LowestCidFirst(const CidRangeTarget* a, const CidRangeTarget* b) {
-  // Negative if 'a' should sort before 'b'.
-  return a->cid_start - b->cid_start;
-}
-
-
-// Returns 'sorted' array in decreasing count order.
-// The expected number of elements to sort is less than 10.
-void FlowGraphCompiler::SortICDataByCount(
-    const ICData& ic_data,
-    GrowableArray<CidRangeTarget>* sorted_arg,
-    bool drop_smi) {
-  GrowableArray<CidRangeTarget>& sorted = *sorted_arg;
-  ASSERT(ic_data.NumArgsTested() == 1);
-  const intptr_t len = ic_data.NumberOfChecks();
-  sorted.Clear();
-
-  for (int i = 0; i < len; i++) {
-    intptr_t receiver_cid = ic_data.GetReceiverClassIdAt(i);
-    if (drop_smi && (receiver_cid == kSmiCid)) continue;
-    Function& target = Function::ZoneHandle(ic_data.GetTargetAt(i));
-    sorted.Add(CidRangeTarget(receiver_cid, receiver_cid, &target,
-                              ic_data.GetCountAt(i)));
-  }
-  sorted.Sort(LowestCidFirst);
-  int dest = 0;
-
-  // Merge adjacent ranges.
-  for (int src = 0; src < sorted.length(); src++) {
-    if (src > 0 && sorted[src - 1].cid_end + 1 == sorted[src].cid_start &&
-        sorted[src - 1].target->raw() == sorted[src].target->raw()) {
-      sorted[dest - 1].cid_end++;
-      sorted[dest - 1].count += sorted[dest].count;
-    } else {
-      sorted[dest++] = sorted[src];
-    }
-  }
-
-  sorted.SetLength(dest);
-  sorted.Sort(HighestCountFirst);
-}
-
-
 const ICData* FlowGraphCompiler::GetOrAddInstanceCallICData(
     intptr_t deopt_id,
     const String& target_name,