Recognize and optimize a.runtimeType == b.runtimeType pattern.

runtime/vm/flow_graph_inliner.cc

Index: runtime/vm/flow_graph_inliner.cc
diff --git a/runtime/vm/flow_graph_inliner.cc b/runtime/vm/flow_graph_inliner.cc
index b42bba53d3ccab8bd7dc7569574db7ba23ee2b94..701d620eeb7be1e3c6a7bdc09537d598fac8aaca 100644
--- a/runtime/vm/flow_graph_inliner.cc
+++ b/runtime/vm/flow_graph_inliner.cc
@@ -829,7 +829,8 @@ class CallSiteInliner : public ValueObject {
           // Deopt-ids overlap between caller and callee.
           if (FLAG_precompiled_mode) {
 #ifdef DART_PRECOMPILER
-            AotOptimizer optimizer(callee_graph,
+            AotOptimizer optimizer(inliner_->precompiler_,
+                                   callee_graph,
                                    inliner_->use_speculative_inlining_,
                                    inliner_->inlining_black_list_);
             optimizer.PopulateWithICData();
@@ -1878,14 +1879,16 @@ FlowGraphInliner::FlowGraphInliner(
     GrowableArray<TokenPosition>* inline_id_to_token_pos,
     GrowableArray<intptr_t>* caller_inline_id,
     bool use_speculative_inlining,
-    GrowableArray<intptr_t>* inlining_black_list)
+    GrowableArray<intptr_t>* inlining_black_list,
+    Precompiler* precompiler)
     : flow_graph_(flow_graph),
       inline_id_to_function_(inline_id_to_function),
       inline_id_to_token_pos_(inline_id_to_token_pos),
       caller_inline_id_(caller_inline_id),
       trace_inlining_(ShouldTraceInlining(flow_graph)),
       use_speculative_inlining_(use_speculative_inlining),
-      inlining_black_list_(inlining_black_list) {
+      inlining_black_list_(inlining_black_list),
+      precompiler_(precompiler) {
   ASSERT(!use_speculative_inlining || (inlining_black_list != NULL));
 }