Refactored FlowGraphBuilder into a separate FlowGraph representation.

runtime/vm/flow_graph_compiler_x64.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_COMPILER_X64_H_
 #define VM_FLOW_GRAPH_COMPILER_X64_H_
 
 #ifndef VM_FLOW_GRAPH_COMPILER_H_
 #error Include flow_graph_compiler.h instead of flow_graph_compiler_x64.h.
 #endif
 
 namespace dart {
 
 class Code;
 class DeoptimizationStub;
+class FlowGraph;
 template <typename T> class GrowableArray;
 class ParsedFunction;
 
 class FlowGraphCompiler : public ValueObject {
  private:
   struct BlockInfo : public ZoneAllocated {
    public:
     BlockInfo() : label() { }
     Label label;
   };
 
  public:
   FlowGraphCompiler(Assembler* assembler,
-                    const ParsedFunction& parsed_function,
-                    const GrowableArray<BlockEntryInstr*>& block_order,
+                    const FlowGraph& flow_graph,
                     bool is_optimizing,
                     bool is_ssa,
                     bool is_leaf);
 
   ~FlowGraphCompiler();
 
   // Accessors.
   Assembler* assembler() const { return assembler_; }
   const ParsedFunction& parsed_function() const { return parsed_function_; }
   const GrowableArray<BlockEntryInstr*>& block_order() const {
@@ skipping 286 matching lines @@
   // that should be used when deoptimizing we store it in this variable.
   // In future AddDeoptStub should be moved out of the instruction template.
   Environment* pending_deoptimization_env_;
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphCompiler);
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_COMPILER_X64_H_