Remove support for optimized dart leaf functions.

runtime/vm/flow_graph_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_FLOW_GRAPH_OPTIMIZER_H_
 #define VM_FLOW_GRAPH_OPTIMIZER_H_
 
 #include "vm/intermediate_language.h"
 #include "vm/flow_graph.h"
 
@@ skipping 67 matching lines @@
   void InlineGArrayCapacityGetter(InstanceCallInstr* call);
   void InlineStringLengthGetter(InstanceCallInstr* call);
   void InlineStringIsEmptyTester(InstanceCallInstr* call);
 
   FlowGraph* flow_graph_;
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphOptimizer);
 };
 
 
-// Analyze the generated flow graph. Currently only if it is a leaf
-// method, i.e., does not contain any calls to runtime or other Dart code.
-class FlowGraphAnalyzer : public ValueObject {
- public:
-  explicit FlowGraphAnalyzer(const FlowGraph& flow_graph)
-      : blocks_(flow_graph.reverse_postorder()), is_leaf_(false) {}
-  virtual ~FlowGraphAnalyzer() {}
-
-  void Analyze();
-
-  bool is_leaf() const { return is_leaf_; }
-
- private:
-  const GrowableArray<BlockEntryInstr*>& blocks_;
-  bool is_leaf_;
-
-  DISALLOW_COPY_AND_ASSIGN(FlowGraphAnalyzer);
-};
-
-
 class ParsedFunction;
 
 
 class FlowGraphTypePropagator : public FlowGraphVisitor {
  public:
   explicit FlowGraphTypePropagator(FlowGraph* flow_graph)
       : FlowGraphVisitor(flow_graph->reverse_postorder()),
         parsed_function_(flow_graph->parsed_function()),
         flow_graph_(flow_graph),
         still_changing_(false) { }
@@ skipping 109 matching lines @@
 
   // Worklists of blocks and definitions.
   GrowableArray<BlockEntryInstr*> block_worklist_;
   GrowableArray<Definition*> definition_worklist_;
 };
 
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_OPTIMIZER_H_