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

runtime/vm/aot_optimizer.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_AOT_OPTIMIZER_H_
 #define VM_AOT_OPTIMIZER_H_
 
 #include "vm/intermediate_language.h"
 #include "vm/flow_graph.h"
 
 namespace dart {
 
 class CSEInstructionMap;
 template <typename T> class GrowableArray;
 class ParsedFunction;
+class Precompiler;
 class RawBool;
 
 class AotOptimizer : public FlowGraphVisitor {
  public:
   AotOptimizer(
+      Precompiler* precompiler,
       FlowGraph* flow_graph,
       bool use_speculative_inlining,
       GrowableArray<intptr_t>* inlining_black_list)
       : FlowGraphVisitor(flow_graph->reverse_postorder()),
+        precompiler_(precompiler),
         flow_graph_(flow_graph),
         use_speculative_inlining_(use_speculative_inlining),
         inlining_black_list_(inlining_black_list) {
     ASSERT(!use_speculative_inlining || (inlining_black_list != NULL));
   }
   virtual ~AotOptimizer() {}
 
   FlowGraph* flow_graph() const { return flow_graph_; }
 
   // Add ICData to InstanceCalls, so that optimizations can be run on them.
@@ skipping 64 matching lines @@
                    Environment* deopt_environment,
                    Instruction* insert_before);
 
   // Add a class check for a call's first argument immediately before the
   // call, using the call's IC data to determine the check, and the call's
   // deopt ID and deoptimization environment if the check fails.
   void AddReceiverCheck(InstanceCallInstr* call);
 
   void ReplaceCall(Definition* call, Definition* replacement);
 
+  bool RecognizeRuntimeTypeGetter(InstanceCallInstr* call);
+
   bool InstanceCallNeedsClassCheck(InstanceCallInstr* call,
                                    RawFunction::Kind kind) const;
 
   bool InlineFloat32x4BinaryOp(InstanceCallInstr* call,
                                Token::Kind op_kind);
   bool InlineInt32x4BinaryOp(InstanceCallInstr* call,
                               Token::Kind op_kind);
   bool InlineFloat64x2BinaryOp(InstanceCallInstr* call,
                                Token::Kind op_kind);
   bool InlineImplicitInstanceGetter(InstanceCallInstr* call);
@@ skipping 10 matching lines @@
   RawField* GetField(intptr_t class_id, const String& field_name);
 
   Thread* thread() const { return flow_graph_->thread(); }
   Isolate* isolate() const { return flow_graph_->isolate(); }
   Zone* zone() const { return flow_graph_->zone(); }
 
   const Function& function() const { return flow_graph_->function(); }
 
   bool IsAllowedForInlining(intptr_t deopt_id);
 
+  Precompiler* precompiler_;
   FlowGraph* flow_graph_;
 
   const bool use_speculative_inlining_;
 
   GrowableArray<intptr_t>* inlining_black_list_;
 
   DISALLOW_COPY_AND_ASSIGN(AotOptimizer);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_AOT_OPTIMIZER_H_