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

runtime/vm/compiler.cc

Index: runtime/vm/compiler.cc
diff --git a/runtime/vm/compiler.cc b/runtime/vm/compiler.cc
index 25fad986f195719a9875322bf279c3cd151dbf7f..6a9ba75b0e4d0bf960af1c4e680ad978f210a9ef 100644
--- a/runtime/vm/compiler.cc
+++ b/runtime/vm/compiler.cc
@@ -834,7 +834,8 @@ bool CompileParsedFunctionHelper::Compile(CompilationPipeline* pipeline) {
                                    &inline_id_to_token_pos,
                                    &caller_inline_id,
                                    use_speculative_inlining,
-                                   NULL);
+                                   /*inlining_black_list=*/ NULL,
+                                   /*precompiler=*/ NULL);
           inliner.Inline();
           // Use lists are maintained and validated by the inliner.
           DEBUG_ASSERT(flow_graph->VerifyUseLists());
@@ -1442,7 +1443,8 @@ RawError* Compiler::CompileFunction(Thread* thread,
                                     const Function& function) {
 #ifdef DART_PRECOMPILER
   if (FLAG_precompiled_mode) {
-    return Precompiler::CompileFunction(thread, thread->zone(), function);
+    return Precompiler::CompileFunction(
+        /* precompiler = */ NULL, thread, thread->zone(), function);
   }
 #endif
   Isolate* isolate = thread->isolate();