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

runtime/vm/intermediate_language.h

Index: runtime/vm/intermediate_language.h
diff --git a/runtime/vm/intermediate_language.h b/runtime/vm/intermediate_language.h
index 102f6b8e42283bc0fb7270ddbcd1747cfc1e3082..f35ee3af14fedea5261aa3af53461965c2990a37 100644
--- a/runtime/vm/intermediate_language.h
+++ b/runtime/vm/intermediate_language.h
@@ -2936,6 +2936,10 @@ class PolymorphicInstanceCallInstr : public TemplateDefinition<0, Throws> {
 
   virtual EffectSet Effects() const { return EffectSet::All(); }
 
+  virtual Definition* Canonicalize(FlowGraph* graph);
+
+  static RawType* ComputeRuntimeType(const ICData& ic_data);
+
   PRINT_OPERANDS_TO_SUPPORT
 
  private:
@@ -3293,6 +3297,7 @@ class StaticCallInstr : public TemplateDefinition<0, Throws> {
 
   DECLARE_INSTRUCTION(StaticCall)
   virtual CompileType ComputeType() const;
+  virtual Definition* Canonicalize(FlowGraph* flow_graph);
 
   // Accessors forwarded to the AST node.
   const Function& function() const { return function_; }