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src/compiler/graph-replay.h

Index: src/compiler/graph-replay.h
diff --git a/src/compiler/graph-replay.h b/src/compiler/graph-replay.h
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+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_COMPILER_GRAPH_REPLAY_H_
+#define V8_COMPILER_GRAPH_REPLAY_H_
+
+#include "src/v8.h"
+
+#include "src/compiler/node.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+class Graph;
+class Operator;
+
+// Helper class to print a full replay of a graph. This replay can be used to
+// materialize the same graph within a C++ unit test and hence test subsequent
+// optimization passes on a graph without going through the construction steps.
+class GraphReplayPrinter : public NullNodeVisitor {
+ public:
+#ifdef DEBUG
+  static void PrintReplay(Graph* graph);
+#else
+  static void PrintReplay(Graph* graph) { }
+#endif
+
+  GenericGraphVisit::Control Pre(Node* node);
+  void PostEdge(Node* from, int index, Node* to);
+
+ private:
+  GraphReplayPrinter() {}
+
+  static void PrintReplayOpCreator(Operator* op);
+
+  DISALLOW_COPY_AND_ASSIGN(GraphReplayPrinter);
+};
+
+} } }  // namespace v8::internal::compiler
+
+#endif  // V8_COMPILER_GRAPH_REPLAY_H_