Initial implementation of a flow-graph builder for Dart's AST.

runtime/vm/flow_graph_builder.h

Index: runtime/vm/flow_graph_builder.h
diff --git a/runtime/vm/flow_graph_builder.h b/runtime/vm/flow_graph_builder.h
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+// 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_BUILDER_H_
+#define VM_FLOW_GRAPH_BUILDER_H_
+
+#include "vm/allocation.h"
+
+namespace dart {
+
+class ParsedFunction;
+
+class FlowGraphBuilder: public ValueObject {
+ public:
+  explicit FlowGraphBuilder(const ParsedFunction& parsed_function)
+      : parsed_function_(parsed_function), bailout_reason_(NULL) { }
+
+  void BuildGraph();
+
+  const ParsedFunction& parsed_function() const { return parsed_function_; }
+
+  void Bailout(const char* reason) { bailout_reason_ = reason; }
+  void TraceBailout() const;
+
+ private:
+  const ParsedFunction& parsed_function_;
+  const char* bailout_reason_;
+};
+
+}  // namespace dart
+
+#endif  // VM_FLOW_GRAPH_BUILDER_H_