Use off-heap data for type feedback in PolymorphicInstanceCallInstr

runtime/vm/jit_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 RUNTIME_VM_JIT_OPTIMIZER_H_
 #define RUNTIME_VM_JIT_OPTIMIZER_H_
 
 #include "vm/intermediate_language.h"
 #include "vm/flow_graph.h"
 
 namespace dart {
 
+struct CidRangeTarget;
 class CSEInstructionMap;
 template <typename T>
 class GrowableArray;
 class ParsedFunction;
 
 class JitOptimizer : public FlowGraphVisitor {
  public:
   explicit JitOptimizer(FlowGraph* flow_graph)
       : FlowGraphVisitor(flow_graph->reverse_postorder()),
         flow_graph_(flow_graph) {}
@@ skipping 14 matching lines @@
   virtual void VisitAllocateContext(AllocateContextInstr* instr);
   virtual void VisitLoadCodeUnits(LoadCodeUnitsInstr* instr);
 
   void InsertBefore(Instruction* next,
                     Instruction* instr,
                     Environment* env,
                     FlowGraph::UseKind use_kind) {
     flow_graph_->InsertBefore(next, instr, env, use_kind);
   }
 
+  // Creates the off-heap PolymorphicTargets object that reflects the contents
+  // of the on-VM-heap IC data. Also expands the class-ids to neighbouring
+  // classes that inherit the same method.
+  static PolymorphicTargets* CreatePolymorphicTargets(Zone* zone,
+                                                      const ICData& ic_data);
+
  private:
   // Attempt to build ICData for call using propagated class-ids.
   bool TryCreateICData(InstanceCallInstr* call);
 
   void SpecializePolymorphicInstanceCall(PolymorphicInstanceCallInstr* call);
 
   bool TryReplaceWithIndexedOp(InstanceCallInstr* call);
 
-  void TryExpandClassesInICData(const ICData& ic_data);
-  bool LookupMethodFor(int class_id,
-                       const ArgumentsDescriptor& args_desc,
-                       const String& name,
-                       Function* fn_return);
-
   bool TryReplaceWithBinaryOp(InstanceCallInstr* call, Token::Kind op_kind);
   bool TryReplaceWithUnaryOp(InstanceCallInstr* call, Token::Kind op_kind);
 
   bool TryReplaceWithEqualityOp(InstanceCallInstr* call, Token::Kind op_kind);
   bool TryReplaceWithRelationalOp(InstanceCallInstr* call, Token::Kind op_kind);
 
   bool TryInlineInstanceGetter(InstanceCallInstr* call);
   bool TryInlineInstanceSetter(InstanceCallInstr* call,
                                const ICData& unary_ic_data);
 
@@ skipping 59 matching lines @@
 
   FlowGraph* flow_graph_;
 
   DISALLOW_COPY_AND_ASSIGN(JitOptimizer);
 };
 
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_JIT_OPTIMIZER_H_